/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/parallel/misc-1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d47b94137d5c7dd60722882962a90fb345e61909-d47b941 [2021-05-03 15:03:22,665 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 15:03:22,666 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 15:03:22,691 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-03 15:03:22,692 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-03 15:03:22,695 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-03 15:03:22,699 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-03 15:03:22,705 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-03 15:03:22,707 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-03 15:03:22,712 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-03 15:03:22,713 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-03 15:03:22,714 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-03 15:03:22,714 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-03 15:03:22,716 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-03 15:03:22,718 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-03 15:03:22,719 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-03 15:03:22,720 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-03 15:03:22,721 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-03 15:03:22,725 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-03 15:03:22,732 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-03 15:03:22,733 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-03 15:03:22,737 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-03 15:03:22,738 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-03 15:03:22,740 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-03 15:03:22,742 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-03 15:03:22,742 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-03 15:03:22,743 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-03 15:03:22,744 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-03 15:03:22,744 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-03 15:03:22,745 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-03 15:03:22,745 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-03 15:03:22,746 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-03 15:03:22,747 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-03 15:03:22,748 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-03 15:03:22,749 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-03 15:03:22,749 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-03 15:03:22,750 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-03 15:03:22,750 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-03 15:03:22,750 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-03 15:03:22,751 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-03 15:03:22,751 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-03 15:03:22,755 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 [2021-05-03 15:03:22,789 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 15:03:22,790 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 15:03:22,790 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-03 15:03:22,790 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-03 15:03:22,793 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-03 15:03:22,793 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-03 15:03:22,793 INFO L138 SettingsManager]: * Use SBE=true [2021-05-03 15:03:22,793 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 15:03:22,793 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 15:03:22,793 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 15:03:22,794 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 15:03:22,794 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 15:03:22,794 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 15:03:22,794 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 15:03:22,794 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 15:03:22,795 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 15:03:22,795 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 15:03:22,795 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 15:03:22,795 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 15:03:22,795 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 15:03:22,795 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 15:03:22,795 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 15:03:22,795 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 15:03:22,795 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 15:03:22,795 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 15:03:22,795 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-03 15:03:22,796 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-03 15:03:22,796 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-03 15:03:22,796 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-03 15:03:22,796 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-03 15:03:22,796 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 15:03:22,796 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-03 15:03:23,080 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 15:03:23,097 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 15:03:23,099 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 15:03:23,101 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-03 15:03:23,102 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-03 15:03:23,102 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-1.wvr.bpl [2021-05-03 15:03:23,103 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-1.wvr.bpl' [2021-05-03 15:03:23,137 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 15:03:23,140 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 15:03:23,141 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-03 15:03:23,141 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-03 15:03:23,141 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-03 15:03:23,151 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:03:23" (1/1) ... [2021-05-03 15:03:23,159 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:03:23" (1/1) ... [2021-05-03 15:03:23,165 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-03 15:03:23,167 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 15:03:23,167 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 15:03:23,167 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 15:03:23,174 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:03:23" (1/1) ... [2021-05-03 15:03:23,174 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:03:23" (1/1) ... [2021-05-03 15:03:23,175 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:03:23" (1/1) ... [2021-05-03 15:03:23,175 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:03:23" (1/1) ... [2021-05-03 15:03:23,179 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:03:23" (1/1) ... [2021-05-03 15:03:23,182 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:03:23" (1/1) ... [2021-05-03 15:03:23,182 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:03:23" (1/1) ... [2021-05-03 15:03:23,183 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 15:03:23,184 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 15:03:23,184 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 15:03:23,184 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 15:03:23,185 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:03:23" (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 [2021-05-03 15:03:23,237 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-03 15:03:23,237 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-03 15:03:23,237 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-03 15:03:23,237 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-03 15:03:23,237 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-03 15:03:23,237 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-03 15:03:23,237 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-03 15:03:23,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 15:03:23,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 15:03:23,238 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-03 15:03:23,464 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 15:03:23,464 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-03 15:03:23,466 INFO L202 PluginConnector]: Adding new model misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 03:03:23 BoogieIcfgContainer [2021-05-03 15:03:23,466 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 15:03:23,467 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 15:03:23,467 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 15:03:23,470 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 15:03:23,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:03:23" (1/2) ... [2021-05-03 15:03:23,471 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33a69fc0 and model type misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 03:03:23, skipping insertion in model container [2021-05-03 15:03:23,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 03:03:23" (2/2) ... [2021-05-03 15:03:23,478 INFO L111 eAbstractionObserver]: Analyzing ICFG misc-1.wvr.bpl [2021-05-03 15:03:23,484 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-03 15:03:23,484 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-03 15:03:23,487 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 15:03:23,488 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-03 15:03:23,515 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-05-03 15:03:23,547 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-05-03 15:03:23,579 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 15:03:23,579 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 15:03:23,579 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-03 15:03:23,579 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 15:03:23,579 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 15:03:23,579 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 15:03:23,579 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 15:03:23,580 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 15:03:23,588 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 31 transitions, 78 flow [2021-05-03 15:03:23,617 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 106 states, 104 states have (on average 2.1634615384615383) internal successors, (225), 105 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:03:23,619 INFO L276 IsEmpty]: Start isEmpty. Operand has 106 states, 104 states have (on average 2.1634615384615383) internal successors, (225), 105 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:03:23,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-03 15:03:23,626 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:03:23,626 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:03:23,627 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:03:23,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:03:23,633 INFO L82 PathProgramCache]: Analyzing trace with hash -884848578, now seen corresponding path program 1 times [2021-05-03 15:03:23,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:03:23,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225106625] [2021-05-03 15:03:23,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:03:23,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:03:23,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:23,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225106625] [2021-05-03 15:03:23,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 15:03:23,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 15:03:23,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127814427] [2021-05-03 15:03:23,944 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 15:03:23,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:03:23,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 15:03:23,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-03 15:03:23,965 INFO L87 Difference]: Start difference. First operand has 106 states, 104 states have (on average 2.1634615384615383) internal successors, (225), 105 states have internal predecessors, (225), 0 states have call successors, (0), 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 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:03:24,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:03:24,148 INFO L93 Difference]: Finished difference Result 299 states and 680 transitions. [2021-05-03 15:03:24,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 15:03:24,149 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2021-05-03 15:03:24,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:03:24,172 INFO L225 Difference]: With dead ends: 299 [2021-05-03 15:03:24,172 INFO L226 Difference]: Without dead ends: 286 [2021-05-03 15:03:24,174 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 92.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-03 15:03:24,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-05-03 15:03:24,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 116. [2021-05-03 15:03:24,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.1478260869565218) internal successors, (247), 115 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:03:24,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 247 transitions. [2021-05-03 15:03:24,227 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 247 transitions. Word has length 13 [2021-05-03 15:03:24,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:03:24,228 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 247 transitions. [2021-05-03 15:03:24,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:03:24,228 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 247 transitions. [2021-05-03 15:03:24,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 15:03:24,229 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:03:24,229 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:03:24,229 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 15:03:24,230 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:03:24,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:03:24,230 INFO L82 PathProgramCache]: Analyzing trace with hash 961813113, now seen corresponding path program 1 times [2021-05-03 15:03:24,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:03:24,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146318176] [2021-05-03 15:03:24,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:03:24,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:03:24,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:24,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146318176] [2021-05-03 15:03:24,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014410754] [2021-05-03 15:03:24,275 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 [2021-05-03 15:03:24,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:03:24,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-03 15:03:24,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:03:24,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:24,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:03:24,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-05-03 15:03:24,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073418029] [2021-05-03 15:03:24,478 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 15:03:24,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:03:24,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 15:03:24,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-03 15:03:24,479 INFO L87 Difference]: Start difference. First operand 116 states and 247 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) [2021-05-03 15:03:24,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:03:24,540 INFO L93 Difference]: Finished difference Result 284 states and 599 transitions. [2021-05-03 15:03:24,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 15:03:24,540 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 17 [2021-05-03 15:03:24,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:03:24,542 INFO L225 Difference]: With dead ends: 284 [2021-05-03 15:03:24,542 INFO L226 Difference]: Without dead ends: 284 [2021-05-03 15:03:24,542 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 24.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-03 15:03:24,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-05-03 15:03:24,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 124. [2021-05-03 15:03:24,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.1707317073170733) internal successors, (267), 123 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:03:24,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 267 transitions. [2021-05-03 15:03:24,552 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 267 transitions. Word has length 17 [2021-05-03 15:03:24,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:03:24,552 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 267 transitions. [2021-05-03 15:03:24,552 INFO L481 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) [2021-05-03 15:03:24,552 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 267 transitions. [2021-05-03 15:03:24,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 15:03:24,553 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:03:24,553 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:03:24,769 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-03 15:03:24,769 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:03:24,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:03:24,770 INFO L82 PathProgramCache]: Analyzing trace with hash 713419811, now seen corresponding path program 1 times [2021-05-03 15:03:24,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:03:24,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642488140] [2021-05-03 15:03:24,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:03:24,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:03:24,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:24,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642488140] [2021-05-03 15:03:24,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 15:03:24,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 15:03:24,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843652095] [2021-05-03 15:03:24,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 15:03:24,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:03:24,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 15:03:24,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 15:03:24,809 INFO L87 Difference]: Start difference. First operand 124 states and 267 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:03:24,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:03:24,861 INFO L93 Difference]: Finished difference Result 166 states and 354 transitions. [2021-05-03 15:03:24,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 15:03:24,862 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2021-05-03 15:03:24,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:03:24,863 INFO L225 Difference]: With dead ends: 166 [2021-05-03 15:03:24,866 INFO L226 Difference]: Without dead ends: 156 [2021-05-03 15:03:24,866 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 15:03:24,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-05-03 15:03:24,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 121. [2021-05-03 15:03:24,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.158333333333333) internal successors, (259), 120 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:03:24,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 259 transitions. [2021-05-03 15:03:24,882 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 259 transitions. Word has length 17 [2021-05-03 15:03:24,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:03:24,882 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 259 transitions. [2021-05-03 15:03:24,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:03:24,883 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 259 transitions. [2021-05-03 15:03:24,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 15:03:24,883 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:03:24,883 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:03:24,884 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-03 15:03:24,884 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:03:24,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:03:24,884 INFO L82 PathProgramCache]: Analyzing trace with hash 2033378241, now seen corresponding path program 2 times [2021-05-03 15:03:24,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:03:24,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51946888] [2021-05-03 15:03:24,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:03:24,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:03:24,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:24,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51946888] [2021-05-03 15:03:24,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780132353] [2021-05-03 15:03:24,939 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 [2021-05-03 15:03:24,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:03:24,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:03:24,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-03 15:03:24,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:03:25,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:25,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:03:25,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-05-03 15:03:25,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253602557] [2021-05-03 15:03:25,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 15:03:25,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:03:25,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 15:03:25,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-03 15:03:25,008 INFO L87 Difference]: Start difference. First operand 121 states and 259 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:03:25,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:03:25,127 INFO L93 Difference]: Finished difference Result 242 states and 545 transitions. [2021-05-03 15:03:25,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 15:03:25,128 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 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 17 [2021-05-03 15:03:25,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:03:25,130 INFO L225 Difference]: With dead ends: 242 [2021-05-03 15:03:25,130 INFO L226 Difference]: Without dead ends: 242 [2021-05-03 15:03:25,131 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 40.7ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-05-03 15:03:25,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-05-03 15:03:25,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 125. [2021-05-03 15:03:25,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.153225806451613) internal successors, (267), 124 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:03:25,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 267 transitions. [2021-05-03 15:03:25,151 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 267 transitions. Word has length 17 [2021-05-03 15:03:25,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:03:25,151 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 267 transitions. [2021-05-03 15:03:25,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:03:25,152 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 267 transitions. [2021-05-03 15:03:25,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 15:03:25,153 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:03:25,153 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:03:25,353 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:03:25,354 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:03:25,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:03:25,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1164039970, now seen corresponding path program 1 times [2021-05-03 15:03:25,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:03:25,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924907908] [2021-05-03 15:03:25,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:03:25,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:03:25,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:25,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924907908] [2021-05-03 15:03:25,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875956011] [2021-05-03 15:03:25,513 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 [2021-05-03 15:03:25,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:03:25,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 15:03:25,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:03:25,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-05-03 15:03:25,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:25,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:03:25,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:03:25,733 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:14, output treesize:7 [2021-05-03 15:03:25,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:25,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:03:25,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-05-03 15:03:25,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919318711] [2021-05-03 15:03:25,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 15:03:25,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:03:25,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 15:03:25,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-05-03 15:03:25,789 INFO L87 Difference]: Start difference. First operand 125 states and 267 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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) [2021-05-03 15:03:26,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:03:26,091 INFO L93 Difference]: Finished difference Result 441 states and 1008 transitions. [2021-05-03 15:03:26,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 15:03:26,091 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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 21 [2021-05-03 15:03:26,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:03:26,094 INFO L225 Difference]: With dead ends: 441 [2021-05-03 15:03:26,094 INFO L226 Difference]: Without dead ends: 431 [2021-05-03 15:03:26,094 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 204.0ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-05-03 15:03:26,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-05-03 15:03:26,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 191. [2021-05-03 15:03:26,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.1842105263157894) internal successors, (415), 190 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:03:26,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 415 transitions. [2021-05-03 15:03:26,103 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 415 transitions. Word has length 21 [2021-05-03 15:03:26,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:03:26,103 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 415 transitions. [2021-05-03 15:03:26,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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) [2021-05-03 15:03:26,103 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 415 transitions. [2021-05-03 15:03:26,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 15:03:26,105 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:03:26,105 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:03:26,320 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:03:26,323 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:03:26,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:03:26,323 INFO L82 PathProgramCache]: Analyzing trace with hash 501161696, now seen corresponding path program 2 times [2021-05-03 15:03:26,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:03:26,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420023843] [2021-05-03 15:03:26,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:03:26,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:03:26,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:26,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420023843] [2021-05-03 15:03:26,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404269046] [2021-05-03 15:03:26,463 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 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 [2021-05-03 15:03:26,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:03:26,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:03:26,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 15:03:26,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:03:26,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 15:03:26,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:26,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:03:26,614 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:03:26,614 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:10 [2021-05-03 15:03:26,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:26,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:03:26,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-05-03 15:03:26,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584250678] [2021-05-03 15:03:26,669 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 15:03:26,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:03:26,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 15:03:26,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-03 15:03:26,670 INFO L87 Difference]: Start difference. First operand 191 states and 415 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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) [2021-05-03 15:03:26,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:03:26,842 INFO L93 Difference]: Finished difference Result 432 states and 992 transitions. [2021-05-03 15:03:26,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 15:03:26,843 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 21 [2021-05-03 15:03:26,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:03:26,847 INFO L225 Difference]: With dead ends: 432 [2021-05-03 15:03:26,847 INFO L226 Difference]: Without dead ends: 423 [2021-05-03 15:03:26,848 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 164.7ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-05-03 15:03:26,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-05-03 15:03:26,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 202. [2021-05-03 15:03:26,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.1940298507462686) internal successors, (441), 201 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:03:26,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 441 transitions. [2021-05-03 15:03:26,858 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 441 transitions. Word has length 21 [2021-05-03 15:03:26,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:03:26,858 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 441 transitions. [2021-05-03 15:03:26,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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) [2021-05-03 15:03:26,859 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 441 transitions. [2021-05-03 15:03:26,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 15:03:26,860 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:03:26,860 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:03:27,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:03:27,073 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:03:27,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:03:27,074 INFO L82 PathProgramCache]: Analyzing trace with hash -2037404550, now seen corresponding path program 3 times [2021-05-03 15:03:27,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:03:27,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14569455] [2021-05-03 15:03:27,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:03:27,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:03:27,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:27,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14569455] [2021-05-03 15:03:27,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057353805] [2021-05-03 15:03:27,223 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 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 [2021-05-03 15:03:27,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 15:03:27,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:03:27,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 15:03:27,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:03:27,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 15:03:27,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:27,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:03:27,363 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:03:27,363 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:10 [2021-05-03 15:03:27,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:27,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:03:27,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-05-03 15:03:27,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201917167] [2021-05-03 15:03:27,417 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 15:03:27,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:03:27,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 15:03:27,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-05-03 15:03:27,418 INFO L87 Difference]: Start difference. First operand 202 states and 441 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 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) [2021-05-03 15:03:27,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:03:27,636 INFO L93 Difference]: Finished difference Result 440 states and 1008 transitions. [2021-05-03 15:03:27,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 15:03:27,637 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 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 21 [2021-05-03 15:03:27,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:03:27,639 INFO L225 Difference]: With dead ends: 440 [2021-05-03 15:03:27,639 INFO L226 Difference]: Without dead ends: 429 [2021-05-03 15:03:27,639 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 180.0ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-05-03 15:03:27,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-05-03 15:03:27,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 199. [2021-05-03 15:03:27,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.191919191919192) internal successors, (434), 198 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:03:27,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 434 transitions. [2021-05-03 15:03:27,647 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 434 transitions. Word has length 21 [2021-05-03 15:03:27,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:03:27,647 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 434 transitions. [2021-05-03 15:03:27,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 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) [2021-05-03 15:03:27,647 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 434 transitions. [2021-05-03 15:03:27,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 15:03:27,648 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:03:27,648 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:03:27,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-03 15:03:27,857 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:03:27,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:03:27,857 INFO L82 PathProgramCache]: Analyzing trace with hash 107399676, now seen corresponding path program 4 times [2021-05-03 15:03:27,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:03:27,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857475847] [2021-05-03 15:03:27,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:03:27,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:03:28,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:28,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857475847] [2021-05-03 15:03:28,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957173245] [2021-05-03 15:03:28,007 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 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 [2021-05-03 15:03:28,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:03:28,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:03:28,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 15:03:28,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:03:28,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-05-03 15:03:28,113 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:28,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:03:28,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:03:28,116 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:14, output treesize:7 [2021-05-03 15:03:28,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:28,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:03:28,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2021-05-03 15:03:28,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723926203] [2021-05-03 15:03:28,152 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 15:03:28,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:03:28,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 15:03:28,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-05-03 15:03:28,153 INFO L87 Difference]: Start difference. First operand 199 states and 434 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 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) [2021-05-03 15:03:28,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:03:28,433 INFO L93 Difference]: Finished difference Result 471 states and 1075 transitions. [2021-05-03 15:03:28,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 15:03:28,434 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 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 21 [2021-05-03 15:03:28,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:03:28,436 INFO L225 Difference]: With dead ends: 471 [2021-05-03 15:03:28,436 INFO L226 Difference]: Without dead ends: 462 [2021-05-03 15:03:28,436 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 199.4ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-05-03 15:03:28,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-05-03 15:03:28,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 224. [2021-05-03 15:03:28,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.192825112107623) internal successors, (489), 223 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:03:28,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 489 transitions. [2021-05-03 15:03:28,444 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 489 transitions. Word has length 21 [2021-05-03 15:03:28,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:03:28,444 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 489 transitions. [2021-05-03 15:03:28,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 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) [2021-05-03 15:03:28,444 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 489 transitions. [2021-05-03 15:03:28,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 15:03:28,445 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:03:28,445 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:03:28,664 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:03:28,665 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:03:28,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:03:28,665 INFO L82 PathProgramCache]: Analyzing trace with hash 286917116, now seen corresponding path program 5 times [2021-05-03 15:03:28,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:03:28,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023350669] [2021-05-03 15:03:28,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:03:28,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:03:28,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:28,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023350669] [2021-05-03 15:03:28,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46427045] [2021-05-03 15:03:28,826 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 15:03:28,855 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 15:03:28,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:03:28,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:03:28,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:03:28,939 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-05-03 15:03:28,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 36 [2021-05-03 15:03:28,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:28,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:03:28,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:03:28,949 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:10 [2021-05-03 15:03:29,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:29,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:03:29,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2021-05-03 15:03:29,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730767545] [2021-05-03 15:03:29,006 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 15:03:29,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:03:29,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 15:03:29,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-05-03 15:03:29,007 INFO L87 Difference]: Start difference. First operand 224 states and 489 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 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) [2021-05-03 15:03:29,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:03:29,319 INFO L93 Difference]: Finished difference Result 472 states and 1084 transitions. [2021-05-03 15:03:29,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 15:03:29,320 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 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 21 [2021-05-03 15:03:29,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:03:29,322 INFO L225 Difference]: With dead ends: 472 [2021-05-03 15:03:29,322 INFO L226 Difference]: Without dead ends: 463 [2021-05-03 15:03:29,322 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 198.3ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-05-03 15:03:29,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-05-03 15:03:29,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 233. [2021-05-03 15:03:29,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.206896551724138) internal successors, (512), 232 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:03:29,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 512 transitions. [2021-05-03 15:03:29,330 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 512 transitions. Word has length 21 [2021-05-03 15:03:29,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:03:29,330 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 512 transitions. [2021-05-03 15:03:29,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 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) [2021-05-03 15:03:29,330 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 512 transitions. [2021-05-03 15:03:29,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 15:03:29,331 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:03:29,331 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:03:29,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:03:29,545 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:03:29,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:03:29,545 INFO L82 PathProgramCache]: Analyzing trace with hash 152115708, now seen corresponding path program 6 times [2021-05-03 15:03:29,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:03:29,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397590216] [2021-05-03 15:03:29,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:03:29,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:03:29,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:29,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397590216] [2021-05-03 15:03:29,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014679571] [2021-05-03 15:03:29,673 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 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 [2021-05-03 15:03:29,694 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 15:03:29,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:03:29,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 15:03:29,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:03:29,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 15:03:29,757 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:29,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:03:29,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:03:29,761 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:10 [2021-05-03 15:03:29,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:29,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:03:29,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2021-05-03 15:03:29,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385793973] [2021-05-03 15:03:29,811 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 15:03:29,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:03:29,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 15:03:29,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-05-03 15:03:29,812 INFO L87 Difference]: Start difference. First operand 233 states and 512 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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) [2021-05-03 15:03:30,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:03:30,073 INFO L93 Difference]: Finished difference Result 469 states and 1074 transitions. [2021-05-03 15:03:30,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 15:03:30,073 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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 21 [2021-05-03 15:03:30,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:03:30,075 INFO L225 Difference]: With dead ends: 469 [2021-05-03 15:03:30,075 INFO L226 Difference]: Without dead ends: 458 [2021-05-03 15:03:30,075 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 194.8ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-05-03 15:03:30,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-05-03 15:03:30,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 224. [2021-05-03 15:03:30,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.192825112107623) internal successors, (489), 223 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:03:30,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 489 transitions. [2021-05-03 15:03:30,082 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 489 transitions. Word has length 21 [2021-05-03 15:03:30,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:03:30,082 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 489 transitions. [2021-05-03 15:03:30,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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) [2021-05-03 15:03:30,082 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 489 transitions. [2021-05-03 15:03:30,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 15:03:30,083 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:03:30,083 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:03:30,302 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-03 15:03:30,303 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:03:30,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:03:30,303 INFO L82 PathProgramCache]: Analyzing trace with hash -696020967, now seen corresponding path program 7 times [2021-05-03 15:03:30,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:03:30,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693695605] [2021-05-03 15:03:30,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:03:30,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:03:30,332 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:30,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693695605] [2021-05-03 15:03:30,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637663721] [2021-05-03 15:03:30,333 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 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 [2021-05-03 15:03:30,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:03:30,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 15:03:30,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:03:30,431 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:30,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:03:30,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-05-03 15:03:30,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11917640] [2021-05-03 15:03:30,433 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 15:03:30,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:03:30,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 15:03:30,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-03 15:03:30,433 INFO L87 Difference]: Start difference. First operand 224 states and 489 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:03:30,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:03:30,542 INFO L93 Difference]: Finished difference Result 475 states and 1004 transitions. [2021-05-03 15:03:30,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 15:03:30,543 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 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 [2021-05-03 15:03:30,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:03:30,544 INFO L225 Difference]: With dead ends: 475 [2021-05-03 15:03:30,545 INFO L226 Difference]: Without dead ends: 475 [2021-05-03 15:03:30,545 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 39.0ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-03 15:03:30,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-05-03 15:03:30,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 295. [2021-05-03 15:03:30,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.302721088435374) internal successors, (677), 294 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:03:30,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 677 transitions. [2021-05-03 15:03:30,553 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 677 transitions. Word has length 25 [2021-05-03 15:03:30,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:03:30,554 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 677 transitions. [2021-05-03 15:03:30,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:03:30,554 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 677 transitions. [2021-05-03 15:03:30,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 15:03:30,555 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:03:30,555 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:03:30,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:03:30,773 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:03:30,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:03:30,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1371569347, now seen corresponding path program 8 times [2021-05-03 15:03:30,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:03:30,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144420626] [2021-05-03 15:03:30,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:03:30,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:03:30,806 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:30,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144420626] [2021-05-03 15:03:30,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421883399] [2021-05-03 15:03:30,807 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) [2021-05-03 15:03:30,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:03:30,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:03:30,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 15:03:30,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:03:30,885 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:30,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:03:30,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-05-03 15:03:30,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91529405] [2021-05-03 15:03:30,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 15:03:30,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:03:30,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 15:03:30,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-03 15:03:30,887 INFO L87 Difference]: Start difference. First operand 295 states and 677 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:03:31,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:03:31,001 INFO L93 Difference]: Finished difference Result 596 states and 1335 transitions. [2021-05-03 15:03:31,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 15:03:31,001 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 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 [2021-05-03 15:03:31,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:03:31,004 INFO L225 Difference]: With dead ends: 596 [2021-05-03 15:03:31,004 INFO L226 Difference]: Without dead ends: 565 [2021-05-03 15:03:31,004 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 26.5ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-03 15:03:31,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-05-03 15:03:31,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 476. [2021-05-03 15:03:31,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 2.351578947368421) internal successors, (1117), 475 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:03:31,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1117 transitions. [2021-05-03 15:03:31,017 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1117 transitions. Word has length 25 [2021-05-03 15:03:31,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:03:31,018 INFO L480 AbstractCegarLoop]: Abstraction has 476 states and 1117 transitions. [2021-05-03 15:03:31,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:03:31,018 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1117 transitions. [2021-05-03 15:03:31,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 15:03:31,019 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:03:31,019 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:03:31,232 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:03:31,233 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:03:31,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:03:31,233 INFO L82 PathProgramCache]: Analyzing trace with hash -2027124135, now seen corresponding path program 9 times [2021-05-03 15:03:31,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:03:31,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413919751] [2021-05-03 15:03:31,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:03:31,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:03:31,260 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:31,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413919751] [2021-05-03 15:03:31,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909639573] [2021-05-03 15:03:31,260 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 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 [2021-05-03 15:03:31,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 15:03:31,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:03:31,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 15:03:31,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:03:31,334 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:31,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:03:31,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-05-03 15:03:31,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261364287] [2021-05-03 15:03:31,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 15:03:31,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:03:31,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 15:03:31,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-03 15:03:31,336 INFO L87 Difference]: Start difference. First operand 476 states and 1117 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:03:31,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:03:31,421 INFO L93 Difference]: Finished difference Result 552 states and 1237 transitions. [2021-05-03 15:03:31,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 15:03:31,422 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 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 [2021-05-03 15:03:31,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:03:31,424 INFO L225 Difference]: With dead ends: 552 [2021-05-03 15:03:31,424 INFO L226 Difference]: Without dead ends: 552 [2021-05-03 15:03:31,424 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 26.0ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-03 15:03:31,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-05-03 15:03:31,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 471. [2021-05-03 15:03:31,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 2.331914893617021) internal successors, (1096), 470 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:03:31,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1096 transitions. [2021-05-03 15:03:31,435 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1096 transitions. Word has length 25 [2021-05-03 15:03:31,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:03:31,435 INFO L480 AbstractCegarLoop]: Abstraction has 471 states and 1096 transitions. [2021-05-03 15:03:31,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:03:31,435 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1096 transitions. [2021-05-03 15:03:31,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 15:03:31,436 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:03:31,437 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:03:31,645 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-03 15:03:31,645 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:03:31,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:03:31,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1525256391, now seen corresponding path program 10 times [2021-05-03 15:03:31,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:03:31,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655713657] [2021-05-03 15:03:31,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:03:31,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:03:31,674 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:31,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655713657] [2021-05-03 15:03:31,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125098562] [2021-05-03 15:03:31,675 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 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 [2021-05-03 15:03:31,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:03:31,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:03:31,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 15:03:31,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:03:31,750 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:31,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:03:31,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-05-03 15:03:31,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115690439] [2021-05-03 15:03:31,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 15:03:31,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:03:31,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 15:03:31,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-03 15:03:31,751 INFO L87 Difference]: Start difference. First operand 471 states and 1096 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:03:31,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:03:31,838 INFO L93 Difference]: Finished difference Result 568 states and 1272 transitions. [2021-05-03 15:03:31,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 15:03:31,839 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 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 [2021-05-03 15:03:31,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:03:31,841 INFO L225 Difference]: With dead ends: 568 [2021-05-03 15:03:31,841 INFO L226 Difference]: Without dead ends: 565 [2021-05-03 15:03:31,841 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 22.7ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-03 15:03:31,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-05-03 15:03:31,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 474. [2021-05-03 15:03:31,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 2.3255813953488373) internal successors, (1100), 473 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:03:31,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1100 transitions. [2021-05-03 15:03:31,853 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1100 transitions. Word has length 25 [2021-05-03 15:03:31,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:03:31,853 INFO L480 AbstractCegarLoop]: Abstraction has 474 states and 1100 transitions. [2021-05-03 15:03:31,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:03:31,853 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1100 transitions. [2021-05-03 15:03:31,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 15:03:31,854 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:03:31,854 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:03:32,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-03 15:03:32,061 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:03:32,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:03:32,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1162212465, now seen corresponding path program 11 times [2021-05-03 15:03:32,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:03:32,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245280617] [2021-05-03 15:03:32,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:03:32,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:03:32,085 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:32,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245280617] [2021-05-03 15:03:32,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786768856] [2021-05-03 15:03:32,086 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 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 [2021-05-03 15:03:32,127 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 15:03:32,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:03:32,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 15:03:32,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:03:32,173 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 15:03:32,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:03:32,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-05-03 15:03:32,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704498202] [2021-05-03 15:03:32,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 15:03:32,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:03:32,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 15:03:32,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-03 15:03:32,174 INFO L87 Difference]: Start difference. First operand 474 states and 1100 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 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) [2021-05-03 15:03:32,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:03:32,280 INFO L93 Difference]: Finished difference Result 699 states and 1561 transitions. [2021-05-03 15:03:32,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 15:03:32,281 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 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 25 [2021-05-03 15:03:32,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:03:32,283 INFO L225 Difference]: With dead ends: 699 [2021-05-03 15:03:32,283 INFO L226 Difference]: Without dead ends: 699 [2021-05-03 15:03:32,283 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 29.4ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-03 15:03:32,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2021-05-03 15:03:32,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 552. [2021-05-03 15:03:32,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 551 states have (on average 2.3611615245009077) internal successors, (1301), 551 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:03:32,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 1301 transitions. [2021-05-03 15:03:32,293 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 1301 transitions. Word has length 25 [2021-05-03 15:03:32,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:03:32,294 INFO L480 AbstractCegarLoop]: Abstraction has 552 states and 1301 transitions. [2021-05-03 15:03:32,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 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) [2021-05-03 15:03:32,294 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 1301 transitions. [2021-05-03 15:03:32,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 15:03:32,295 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:03:32,295 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:03:32,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-03 15:03:32,509 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:03:32,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:03:32,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1664080209, now seen corresponding path program 12 times [2021-05-03 15:03:32,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:03:32,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998739947] [2021-05-03 15:03:32,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:03:32,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:03:32,531 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:32,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998739947] [2021-05-03 15:03:32,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077798746] [2021-05-03 15:03:32,531 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 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 [2021-05-03 15:03:32,561 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 15:03:32,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:03:32,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 15:03:32,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:03:32,641 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 15:03:32,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:03:32,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-05-03 15:03:32,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496110383] [2021-05-03 15:03:32,642 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 15:03:32,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:03:32,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 15:03:32,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-03 15:03:32,642 INFO L87 Difference]: Start difference. First operand 552 states and 1301 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 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) [2021-05-03 15:03:32,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:03:32,742 INFO L93 Difference]: Finished difference Result 875 states and 2015 transitions. [2021-05-03 15:03:32,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 15:03:32,742 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 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 25 [2021-05-03 15:03:32,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:03:32,745 INFO L225 Difference]: With dead ends: 875 [2021-05-03 15:03:32,745 INFO L226 Difference]: Without dead ends: 872 [2021-05-03 15:03:32,746 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 19.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-03 15:03:32,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2021-05-03 15:03:32,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 717. [2021-05-03 15:03:32,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 716 states have (on average 2.403631284916201) internal successors, (1721), 716 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:03:32,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 1721 transitions. [2021-05-03 15:03:32,762 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 1721 transitions. Word has length 25 [2021-05-03 15:03:32,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:03:32,763 INFO L480 AbstractCegarLoop]: Abstraction has 717 states and 1721 transitions. [2021-05-03 15:03:32,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 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) [2021-05-03 15:03:32,763 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 1721 transitions. [2021-05-03 15:03:32,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 15:03:32,764 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:03:32,764 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:03:32,980 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:03:32,981 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:03:32,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:03:32,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1322657579, now seen corresponding path program 13 times [2021-05-03 15:03:32,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:03:32,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488515213] [2021-05-03 15:03:32,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:03:32,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:03:33,008 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:33,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488515213] [2021-05-03 15:03:33,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986030717] [2021-05-03 15:03:33,008 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 [2021-05-03 15:03:33,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:03:33,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 15:03:33,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:03:33,068 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 15:03:33,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:03:33,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-05-03 15:03:33,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046240597] [2021-05-03 15:03:33,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 15:03:33,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:03:33,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 15:03:33,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-03 15:03:33,070 INFO L87 Difference]: Start difference. First operand 717 states and 1721 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 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) [2021-05-03 15:03:33,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:03:33,152 INFO L93 Difference]: Finished difference Result 880 states and 2012 transitions. [2021-05-03 15:03:33,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 15:03:33,152 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 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 25 [2021-05-03 15:03:33,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:03:33,155 INFO L225 Difference]: With dead ends: 880 [2021-05-03 15:03:33,155 INFO L226 Difference]: Without dead ends: 880 [2021-05-03 15:03:33,156 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 26.0ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-03 15:03:33,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2021-05-03 15:03:33,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 703. [2021-05-03 15:03:33,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 2.4017094017094016) internal successors, (1686), 702 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:03:33,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1686 transitions. [2021-05-03 15:03:33,171 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1686 transitions. Word has length 25 [2021-05-03 15:03:33,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:03:33,171 INFO L480 AbstractCegarLoop]: Abstraction has 703 states and 1686 transitions. [2021-05-03 15:03:33,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 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) [2021-05-03 15:03:33,172 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1686 transitions. [2021-05-03 15:03:33,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 15:03:33,174 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:03:33,174 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:03:33,392 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-03 15:03:33,393 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:03:33,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:03:33,394 INFO L82 PathProgramCache]: Analyzing trace with hash -2065651895, now seen corresponding path program 14 times [2021-05-03 15:03:33,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:03:33,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146024054] [2021-05-03 15:03:33,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:03:33,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:03:33,442 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:33,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146024054] [2021-05-03 15:03:33,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711064291] [2021-05-03 15:03:33,442 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 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 [2021-05-03 15:03:33,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:03:33,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:03:33,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 15:03:33,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:03:33,494 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 15:03:33,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:03:33,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-05-03 15:03:33,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610307005] [2021-05-03 15:03:33,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 15:03:33,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:03:33,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 15:03:33,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-03 15:03:33,496 INFO L87 Difference]: Start difference. First operand 703 states and 1686 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 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) [2021-05-03 15:03:33,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:03:33,597 INFO L93 Difference]: Finished difference Result 810 states and 1869 transitions. [2021-05-03 15:03:33,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 15:03:33,597 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 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 25 [2021-05-03 15:03:33,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:03:33,600 INFO L225 Difference]: With dead ends: 810 [2021-05-03 15:03:33,600 INFO L226 Difference]: Without dead ends: 806 [2021-05-03 15:03:33,600 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-03 15:03:33,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2021-05-03 15:03:33,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 703. [2021-05-03 15:03:33,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 2.4002849002849005) internal successors, (1685), 702 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:03:33,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1685 transitions. [2021-05-03 15:03:33,615 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1685 transitions. Word has length 25 [2021-05-03 15:03:33,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:03:33,615 INFO L480 AbstractCegarLoop]: Abstraction has 703 states and 1685 transitions. [2021-05-03 15:03:33,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 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) [2021-05-03 15:03:33,615 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1685 transitions. [2021-05-03 15:03:33,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 15:03:33,617 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:03:33,617 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:03:33,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-03 15:03:33,833 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:03:33,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:03:33,833 INFO L82 PathProgramCache]: Analyzing trace with hash 893466037, now seen corresponding path program 15 times [2021-05-03 15:03:33,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:03:33,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243512173] [2021-05-03 15:03:33,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:03:33,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:03:33,861 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:33,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243512173] [2021-05-03 15:03:33,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529938015] [2021-05-03 15:03:33,861 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 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 [2021-05-03 15:03:33,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 15:03:33,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:03:33,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 15:03:33,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:03:33,922 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:33,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:03:33,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-05-03 15:03:33,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626687785] [2021-05-03 15:03:33,923 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 15:03:33,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:03:33,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 15:03:33,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-03 15:03:33,923 INFO L87 Difference]: Start difference. First operand 703 states and 1685 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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) [2021-05-03 15:03:34,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:03:34,036 INFO L93 Difference]: Finished difference Result 795 states and 1844 transitions. [2021-05-03 15:03:34,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 15:03:34,037 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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 25 [2021-05-03 15:03:34,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:03:34,039 INFO L225 Difference]: With dead ends: 795 [2021-05-03 15:03:34,039 INFO L226 Difference]: Without dead ends: 795 [2021-05-03 15:03:34,040 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 37.4ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-03 15:03:34,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2021-05-03 15:03:34,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 698. [2021-05-03 15:03:34,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 697 states have (on average 2.3916786226685796) internal successors, (1667), 697 states have internal predecessors, (1667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:03:34,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 1667 transitions. [2021-05-03 15:03:34,053 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 1667 transitions. Word has length 25 [2021-05-03 15:03:34,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:03:34,053 INFO L480 AbstractCegarLoop]: Abstraction has 698 states and 1667 transitions. [2021-05-03 15:03:34,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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) [2021-05-03 15:03:34,053 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 1667 transitions. [2021-05-03 15:03:34,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 15:03:34,055 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:03:34,055 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:03:34,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:03:34,269 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:03:34,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:03:34,269 INFO L82 PathProgramCache]: Analyzing trace with hash -886523081, now seen corresponding path program 16 times [2021-05-03 15:03:34,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:03:34,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086972237] [2021-05-03 15:03:34,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:03:34,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:03:34,293 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:34,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086972237] [2021-05-03 15:03:34,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530714978] [2021-05-03 15:03:34,293 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 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 [2021-05-03 15:03:34,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:03:34,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:03:34,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 15:03:34,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:03:34,367 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:34,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:03:34,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-05-03 15:03:34,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421882533] [2021-05-03 15:03:34,367 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 15:03:34,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:03:34,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 15:03:34,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-03 15:03:34,368 INFO L87 Difference]: Start difference. First operand 698 states and 1667 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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) [2021-05-03 15:03:34,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:03:34,499 INFO L93 Difference]: Finished difference Result 856 states and 1953 transitions. [2021-05-03 15:03:34,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 15:03:34,505 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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 25 [2021-05-03 15:03:34,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:03:34,508 INFO L225 Difference]: With dead ends: 856 [2021-05-03 15:03:34,508 INFO L226 Difference]: Without dead ends: 835 [2021-05-03 15:03:34,508 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 37.1ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-03 15:03:34,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2021-05-03 15:03:34,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 719. [2021-05-03 15:03:34,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 2.370473537604457) internal successors, (1702), 718 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:03:34,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 1702 transitions. [2021-05-03 15:03:34,524 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 1702 transitions. Word has length 25 [2021-05-03 15:03:34,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:03:34,524 INFO L480 AbstractCegarLoop]: Abstraction has 719 states and 1702 transitions. [2021-05-03 15:03:34,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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) [2021-05-03 15:03:34,524 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 1702 transitions. [2021-05-03 15:03:34,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:03:34,526 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:03:34,526 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:03:34,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:03:34,733 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:03:34,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:03:34,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1579561346, now seen corresponding path program 17 times [2021-05-03 15:03:34,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:03:34,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446949899] [2021-05-03 15:03:34,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:03:34,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:03:35,034 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:35,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446949899] [2021-05-03 15:03:35,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408657336] [2021-05-03 15:03:35,034 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 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 [2021-05-03 15:03:35,073 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 15:03:35,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:03:35,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:03:35,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:03:35,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 15:03:35,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:35,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:03:35,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:03:35,236 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-05-03 15:03:35,261 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:35,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:03:35,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-05-03 15:03:35,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251138235] [2021-05-03 15:03:35,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 15:03:35,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:03:35,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 15:03:35,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-05-03 15:03:35,262 INFO L87 Difference]: Start difference. First operand 719 states and 1702 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-05-03 15:03:36,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:03:36,333 INFO L93 Difference]: Finished difference Result 1938 states and 4685 transitions. [2021-05-03 15:03:36,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 15:03:36,333 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 [2021-05-03 15:03:36,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:03:36,339 INFO L225 Difference]: With dead ends: 1938 [2021-05-03 15:03:36,340 INFO L226 Difference]: Without dead ends: 1928 [2021-05-03 15:03:36,340 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 641.3ms TimeCoverageRelationStatistics Valid=189, Invalid=681, Unknown=0, NotChecked=0, Total=870 [2021-05-03 15:03:36,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2021-05-03 15:03:36,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 773. [2021-05-03 15:03:36,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 2.36139896373057) internal successors, (1823), 772 states have internal predecessors, (1823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:03:36,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 1823 transitions. [2021-05-03 15:03:36,359 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 1823 transitions. Word has length 29 [2021-05-03 15:03:36,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:03:36,361 INFO L480 AbstractCegarLoop]: Abstraction has 773 states and 1823 transitions. [2021-05-03 15:03:36,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-05-03 15:03:36,361 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 1823 transitions. [2021-05-03 15:03:36,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:03:36,363 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:03:36,363 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:03:36,576 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:03:36,577 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:03:36,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:03:36,577 INFO L82 PathProgramCache]: Analyzing trace with hash 298021654, now seen corresponding path program 18 times [2021-05-03 15:03:36,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:03:36,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554154229] [2021-05-03 15:03:36,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:03:36,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:03:36,849 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:36,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554154229] [2021-05-03 15:03:36,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349053922] [2021-05-03 15:03:36,849 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 15:03:36,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 15:03:36,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:03:36,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:03:36,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:03:37,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 15:03:37,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:37,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:03:37,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:03:37,020 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:13 [2021-05-03 15:03:37,047 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:37,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:03:37,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 18 [2021-05-03 15:03:37,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725489464] [2021-05-03 15:03:37,047 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 15:03:37,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:03:37,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 15:03:37,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:03:37,048 INFO L87 Difference]: Start difference. First operand 773 states and 1823 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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) [2021-05-03 15:03:38,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:03:38,082 INFO L93 Difference]: Finished difference Result 2173 states and 5321 transitions. [2021-05-03 15:03:38,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 15:03:38,082 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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 29 [2021-05-03 15:03:38,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:03:38,090 INFO L225 Difference]: With dead ends: 2173 [2021-05-03 15:03:38,090 INFO L226 Difference]: Without dead ends: 2162 [2021-05-03 15:03:38,090 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 785.5ms TimeCoverageRelationStatistics Valid=197, Invalid=859, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 15:03:38,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2162 states. [2021-05-03 15:03:38,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2162 to 807. [2021-05-03 15:03:38,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 2.3734491315136474) internal successors, (1913), 806 states have internal predecessors, (1913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:03:38,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1913 transitions. [2021-05-03 15:03:38,114 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1913 transitions. Word has length 29 [2021-05-03 15:03:38,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:03:38,114 INFO L480 AbstractCegarLoop]: Abstraction has 807 states and 1913 transitions. [2021-05-03 15:03:38,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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) [2021-05-03 15:03:38,114 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1913 transitions. [2021-05-03 15:03:38,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:03:38,116 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:03:38,116 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:03:38,328 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-03 15:03:38,329 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:03:38,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:03:38,329 INFO L82 PathProgramCache]: Analyzing trace with hash 2054422704, now seen corresponding path program 19 times [2021-05-03 15:03:38,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:03:38,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168526380] [2021-05-03 15:03:38,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:03:38,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:03:38,601 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:38,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168526380] [2021-05-03 15:03:38,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713719857] [2021-05-03 15:03:38,601 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 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 [2021-05-03 15:03:38,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:03:38,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:03:38,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:03:38,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 15:03:38,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:38,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:03:38,772 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:03:38,772 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:13 [2021-05-03 15:03:38,799 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:38,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:03:38,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 18 [2021-05-03 15:03:38,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703047218] [2021-05-03 15:03:38,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 15:03:38,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:03:38,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 15:03:38,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:03:38,800 INFO L87 Difference]: Start difference. First operand 807 states and 1913 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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) [2021-05-03 15:03:40,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:03:40,033 INFO L93 Difference]: Finished difference Result 2310 states and 5631 transitions. [2021-05-03 15:03:40,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 15:03:40,037 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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 29 [2021-05-03 15:03:40,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:03:40,044 INFO L225 Difference]: With dead ends: 2310 [2021-05-03 15:03:40,045 INFO L226 Difference]: Without dead ends: 2290 [2021-05-03 15:03:40,045 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 815.4ms TimeCoverageRelationStatistics Valid=251, Invalid=871, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 15:03:40,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2021-05-03 15:03:40,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 796. [2021-05-03 15:03:40,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 795 states have (on average 2.372327044025157) internal successors, (1886), 795 states have internal predecessors, (1886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:03:40,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1886 transitions. [2021-05-03 15:03:40,066 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1886 transitions. Word has length 29 [2021-05-03 15:03:40,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:03:40,066 INFO L480 AbstractCegarLoop]: Abstraction has 796 states and 1886 transitions. [2021-05-03 15:03:40,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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) [2021-05-03 15:03:40,066 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1886 transitions. [2021-05-03 15:03:40,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:03:40,068 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:03:40,068 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:03:40,284 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-03 15:03:40,285 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:03:40,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:03:40,285 INFO L82 PathProgramCache]: Analyzing trace with hash 483082792, now seen corresponding path program 20 times [2021-05-03 15:03:40,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:03:40,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670822932] [2021-05-03 15:03:40,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:03:40,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:03:40,561 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:40,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670822932] [2021-05-03 15:03:40,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189360198] [2021-05-03 15:03:40,561 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 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 [2021-05-03 15:03:40,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:03:40,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:03:40,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:03:40,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:03:40,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 15:03:40,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:40,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:03:40,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:03:40,757 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-05-03 15:03:40,782 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:40,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:03:40,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-05-03 15:03:40,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665011192] [2021-05-03 15:03:40,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 15:03:40,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:03:40,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 15:03:40,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-05-03 15:03:40,783 INFO L87 Difference]: Start difference. First operand 796 states and 1886 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 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) [2021-05-03 15:03:41,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:03:41,998 INFO L93 Difference]: Finished difference Result 2101 states and 5071 transitions. [2021-05-03 15:03:41,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 15:03:41,999 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 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 [2021-05-03 15:03:41,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:03:42,005 INFO L225 Difference]: With dead ends: 2101 [2021-05-03 15:03:42,006 INFO L226 Difference]: Without dead ends: 2078 [2021-05-03 15:03:42,006 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 800.2ms TimeCoverageRelationStatistics Valid=252, Invalid=804, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 15:03:42,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2078 states. [2021-05-03 15:03:42,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2078 to 800. [2021-05-03 15:03:42,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 2.3667083854818523) internal successors, (1891), 799 states have internal predecessors, (1891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:03:42,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1891 transitions. [2021-05-03 15:03:42,023 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1891 transitions. Word has length 29 [2021-05-03 15:03:42,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:03:42,024 INFO L480 AbstractCegarLoop]: Abstraction has 800 states and 1891 transitions. [2021-05-03 15:03:42,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 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) [2021-05-03 15:03:42,024 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1891 transitions. [2021-05-03 15:03:42,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:03:42,025 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:03:42,025 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:03:42,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:03:42,241 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:03:42,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:03:42,241 INFO L82 PathProgramCache]: Analyzing trace with hash -830162232, now seen corresponding path program 21 times [2021-05-03 15:03:42,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:03:42,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970057235] [2021-05-03 15:03:42,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:03:42,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:03:42,513 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:42,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970057235] [2021-05-03 15:03:42,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948187587] [2021-05-03 15:03:42,514 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 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 [2021-05-03 15:03:42,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 15:03:42,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:03:42,534 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 15:03:42,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:03:42,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:03:42,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:03:42,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 15:03:42,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:42,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:03:42,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:03:42,892 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:10 [2021-05-03 15:03:42,919 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:42,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:03:42,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-05-03 15:03:42,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673584500] [2021-05-03 15:03:42,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 15:03:42,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:03:42,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 15:03:42,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-05-03 15:03:42,922 INFO L87 Difference]: Start difference. First operand 800 states and 1891 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 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) [2021-05-03 15:03:44,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:03:44,338 INFO L93 Difference]: Finished difference Result 1859 states and 4469 transitions. [2021-05-03 15:03:44,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 15:03:44,339 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 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 [2021-05-03 15:03:44,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:03:44,343 INFO L225 Difference]: With dead ends: 1859 [2021-05-03 15:03:44,343 INFO L226 Difference]: Without dead ends: 1849 [2021-05-03 15:03:44,344 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 998.7ms TimeCoverageRelationStatistics Valid=268, Invalid=1064, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 15:03:44,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1849 states. [2021-05-03 15:03:44,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1849 to 800. [2021-05-03 15:03:44,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 2.3667083854818523) internal successors, (1891), 799 states have internal predecessors, (1891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:03:44,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1891 transitions. [2021-05-03 15:03:44,365 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1891 transitions. Word has length 29 [2021-05-03 15:03:44,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:03:44,365 INFO L480 AbstractCegarLoop]: Abstraction has 800 states and 1891 transitions. [2021-05-03 15:03:44,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 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) [2021-05-03 15:03:44,366 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1891 transitions. [2021-05-03 15:03:44,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:03:44,367 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:03:44,367 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:03:44,580 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-03 15:03:44,581 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:03:44,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:03:44,581 INFO L82 PathProgramCache]: Analyzing trace with hash 813575516, now seen corresponding path program 22 times [2021-05-03 15:03:44,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:03:44,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113751490] [2021-05-03 15:03:44,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:03:44,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:03:44,842 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:44,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113751490] [2021-05-03 15:03:44,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521659775] [2021-05-03 15:03:44,843 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 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 [2021-05-03 15:03:44,861 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:03:44,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:03:44,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:03:44,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:03:45,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 15:03:45,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:45,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:03:45,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:03:45,048 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-05-03 15:03:45,073 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:45,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:03:45,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2021-05-03 15:03:45,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493515835] [2021-05-03 15:03:45,074 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 15:03:45,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:03:45,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 15:03:45,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:03:45,075 INFO L87 Difference]: Start difference. First operand 800 states and 1891 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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) [2021-05-03 15:03:46,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:03:46,600 INFO L93 Difference]: Finished difference Result 2092 states and 5123 transitions. [2021-05-03 15:03:46,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 15:03:46,600 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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 29 [2021-05-03 15:03:46,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:03:46,605 INFO L225 Difference]: With dead ends: 2092 [2021-05-03 15:03:46,605 INFO L226 Difference]: Without dead ends: 2083 [2021-05-03 15:03:46,605 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 922.6ms TimeCoverageRelationStatistics Valid=192, Invalid=1068, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 15:03:46,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2083 states. [2021-05-03 15:03:46,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2083 to 825. [2021-05-03 15:03:46,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 824 states have (on average 2.371359223300971) internal successors, (1954), 824 states have internal predecessors, (1954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:03:46,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 1954 transitions. [2021-05-03 15:03:46,624 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 1954 transitions. Word has length 29 [2021-05-03 15:03:46,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:03:46,624 INFO L480 AbstractCegarLoop]: Abstraction has 825 states and 1954 transitions. [2021-05-03 15:03:46,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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) [2021-05-03 15:03:46,624 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 1954 transitions. [2021-05-03 15:03:46,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:03:46,626 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:03:46,626 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:03:46,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:03:46,841 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:03:46,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:03:46,841 INFO L82 PathProgramCache]: Analyzing trace with hash 993092956, now seen corresponding path program 23 times [2021-05-03 15:03:46,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:03:46,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310291696] [2021-05-03 15:03:46,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:03:46,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:03:47,132 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:47,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310291696] [2021-05-03 15:03:47,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100118672] [2021-05-03 15:03:47,132 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 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 [2021-05-03 15:03:47,153 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 15:03:47,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:03:47,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:03:47,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:03:47,325 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-05-03 15:03:47,325 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 90 treesize of output 51 [2021-05-03 15:03:47,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:47,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:03:47,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:03:47,334 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:96, output treesize:13 [2021-05-03 15:03:47,361 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:47,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:03:47,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 17 [2021-05-03 15:03:47,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624543858] [2021-05-03 15:03:47,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 15:03:47,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:03:47,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 15:03:47,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-05-03 15:03:47,362 INFO L87 Difference]: Start difference. First operand 825 states and 1954 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:03:48,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:03:48,627 INFO L93 Difference]: Finished difference Result 2113 states and 5192 transitions. [2021-05-03 15:03:48,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 15:03:48,628 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 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 [2021-05-03 15:03:48,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:03:48,632 INFO L225 Difference]: With dead ends: 2113 [2021-05-03 15:03:48,632 INFO L226 Difference]: Without dead ends: 2102 [2021-05-03 15:03:48,633 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 844.9ms TimeCoverageRelationStatistics Valid=200, Invalid=922, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 15:03:48,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2102 states. [2021-05-03 15:03:48,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2102 to 837. [2021-05-03 15:03:48,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 836 states have (on average 2.373205741626794) internal successors, (1984), 836 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:03:48,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1984 transitions. [2021-05-03 15:03:48,652 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1984 transitions. Word has length 29 [2021-05-03 15:03:48,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:03:48,652 INFO L480 AbstractCegarLoop]: Abstraction has 837 states and 1984 transitions. [2021-05-03 15:03:48,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:03:48,652 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1984 transitions. [2021-05-03 15:03:48,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:03:48,654 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:03:48,654 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:03:48,869 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-03 15:03:48,870 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:03:48,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:03:48,870 INFO L82 PathProgramCache]: Analyzing trace with hash 858291548, now seen corresponding path program 24 times [2021-05-03 15:03:48,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:03:48,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411746890] [2021-05-03 15:03:48,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:03:48,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:03:49,161 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:49,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411746890] [2021-05-03 15:03:49,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835808084] [2021-05-03 15:03:49,161 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 15:03:49,198 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 15:03:49,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:03:49,199 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:03:49,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:03:49,362 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:03:49,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-05-03 15:03:49,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-03 15:03:49,420 INFO L628 ElimStorePlain]: treesize reduction 24, result has 65.2 percent of original size [2021-05-03 15:03:49,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:03:49,425 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:45 [2021-05-03 15:03:49,547 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:49,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:03:49,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-05-03 15:03:49,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252413356] [2021-05-03 15:03:49,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 15:03:49,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:03:49,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 15:03:49,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:03:49,549 INFO L87 Difference]: Start difference. First operand 837 states and 1984 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 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) [2021-05-03 15:03:51,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:03:51,853 INFO L93 Difference]: Finished difference Result 2343 states and 5770 transitions. [2021-05-03 15:03:51,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-03 15:03:51,853 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 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 29 [2021-05-03 15:03:51,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:03:51,858 INFO L225 Difference]: With dead ends: 2343 [2021-05-03 15:03:51,858 INFO L226 Difference]: Without dead ends: 2322 [2021-05-03 15:03:51,858 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 1718.1ms TimeCoverageRelationStatistics Valid=378, Invalid=2072, Unknown=0, NotChecked=0, Total=2450 [2021-05-03 15:03:51,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2322 states. [2021-05-03 15:03:51,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2322 to 824. [2021-05-03 15:03:51,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 823 states have (on average 2.3718104495747268) internal successors, (1952), 823 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:03:51,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 1952 transitions. [2021-05-03 15:03:51,877 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 1952 transitions. Word has length 29 [2021-05-03 15:03:51,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:03:51,877 INFO L480 AbstractCegarLoop]: Abstraction has 824 states and 1952 transitions. [2021-05-03 15:03:51,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 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) [2021-05-03 15:03:51,877 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 1952 transitions. [2021-05-03 15:03:51,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:03:51,878 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:03:51,878 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:03:52,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-03 15:03:52,084 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:03:52,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:03:52,084 INFO L82 PathProgramCache]: Analyzing trace with hash -949069254, now seen corresponding path program 25 times [2021-05-03 15:03:52,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:03:52,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879388383] [2021-05-03 15:03:52,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:03:52,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:03:52,412 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:52,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879388383] [2021-05-03 15:03:52,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343532685] [2021-05-03 15:03:52,413 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 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 [2021-05-03 15:03:52,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:03:52,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:03:52,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:03:52,602 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-05-03 15:03:52,603 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 90 treesize of output 51 [2021-05-03 15:03:52,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:52,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:03:52,613 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:03:52,613 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:96, output treesize:13 [2021-05-03 15:03:52,643 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:52,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:03:52,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 18 [2021-05-03 15:03:52,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939201666] [2021-05-03 15:03:52,644 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 15:03:52,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:03:52,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 15:03:52,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:03:52,645 INFO L87 Difference]: Start difference. First operand 824 states and 1952 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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) [2021-05-03 15:03:53,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:03:53,905 INFO L93 Difference]: Finished difference Result 2128 states and 5217 transitions. [2021-05-03 15:03:53,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 15:03:53,905 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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 29 [2021-05-03 15:03:53,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:03:53,910 INFO L225 Difference]: With dead ends: 2128 [2021-05-03 15:03:53,910 INFO L226 Difference]: Without dead ends: 2117 [2021-05-03 15:03:53,910 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 944.8ms TimeCoverageRelationStatistics Valid=215, Invalid=907, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 15:03:53,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2117 states. [2021-05-03 15:03:53,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2117 to 845. [2021-05-03 15:03:53,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 2.376777251184834) internal successors, (2006), 844 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:03:53,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2006 transitions. [2021-05-03 15:03:53,930 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2006 transitions. Word has length 29 [2021-05-03 15:03:53,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:03:53,930 INFO L480 AbstractCegarLoop]: Abstraction has 845 states and 2006 transitions. [2021-05-03 15:03:53,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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) [2021-05-03 15:03:53,930 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2006 transitions. [2021-05-03 15:03:53,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:03:53,931 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:03:53,931 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:03:54,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-03 15:03:54,145 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:03:54,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:03:54,145 INFO L82 PathProgramCache]: Analyzing trace with hash 807331796, now seen corresponding path program 26 times [2021-05-03 15:03:54,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:03:54,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306093853] [2021-05-03 15:03:54,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:03:54,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:03:54,453 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:54,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306093853] [2021-05-03 15:03:54,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140124173] [2021-05-03 15:03:54,453 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 15:03:54,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:03:54,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:03:54,483 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 15:03:54,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:03:54,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:03:54,629 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:03:54,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-05-03 15:03:54,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:54,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:03:54,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:03:54,667 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:47 [2021-05-03 15:03:54,816 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:54,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:03:54,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2021-05-03 15:03:54,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492833333] [2021-05-03 15:03:54,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 15:03:54,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:03:54,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 15:03:54,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-05-03 15:03:54,818 INFO L87 Difference]: Start difference. First operand 845 states and 2006 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 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) [2021-05-03 15:03:56,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:03:56,765 INFO L93 Difference]: Finished difference Result 2249 states and 5506 transitions. [2021-05-03 15:03:56,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 15:03:56,765 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 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 29 [2021-05-03 15:03:56,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:03:56,770 INFO L225 Difference]: With dead ends: 2249 [2021-05-03 15:03:56,770 INFO L226 Difference]: Without dead ends: 2237 [2021-05-03 15:03:56,771 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 1455.1ms TimeCoverageRelationStatistics Valid=367, Invalid=1355, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 15:03:56,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2237 states. [2021-05-03 15:03:56,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2237 to 870. [2021-05-03 15:03:56,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 2.384349827387802) internal successors, (2072), 869 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:03:56,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 2072 transitions. [2021-05-03 15:03:56,791 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 2072 transitions. Word has length 29 [2021-05-03 15:03:56,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:03:56,791 INFO L480 AbstractCegarLoop]: Abstraction has 870 states and 2072 transitions. [2021-05-03 15:03:56,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 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) [2021-05-03 15:03:56,792 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 2072 transitions. [2021-05-03 15:03:56,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:03:56,793 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:03:56,793 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:03:57,003 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-03 15:03:57,004 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:03:57,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:03:57,004 INFO L82 PathProgramCache]: Analyzing trace with hash -110618394, now seen corresponding path program 27 times [2021-05-03 15:03:57,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:03:57,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394007253] [2021-05-03 15:03:57,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:03:57,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:03:57,290 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:57,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394007253] [2021-05-03 15:03:57,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192092453] [2021-05-03 15:03:57,290 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 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 [2021-05-03 15:03:57,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 15:03:57,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:03:57,312 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 15:03:57,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:03:57,521 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:03:57,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-05-03 15:03:57,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:57,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:03:57,543 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:03:57,543 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:38 [2021-05-03 15:03:57,775 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:57,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:03:57,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 24 [2021-05-03 15:03:57,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643411358] [2021-05-03 15:03:57,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 15:03:57,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:03:57,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 15:03:57,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2021-05-03 15:03:57,777 INFO L87 Difference]: Start difference. First operand 870 states and 2072 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 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) [2021-05-03 15:04:00,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:04:00,269 INFO L93 Difference]: Finished difference Result 2369 states and 5745 transitions. [2021-05-03 15:04:00,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-03 15:04:00,269 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 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 [2021-05-03 15:04:00,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:04:00,274 INFO L225 Difference]: With dead ends: 2369 [2021-05-03 15:04:00,275 INFO L226 Difference]: Without dead ends: 2348 [2021-05-03 15:04:00,275 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 2250.2ms TimeCoverageRelationStatistics Valid=651, Invalid=2655, Unknown=0, NotChecked=0, Total=3306 [2021-05-03 15:04:00,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2348 states. [2021-05-03 15:04:00,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2348 to 865. [2021-05-03 15:04:00,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 864 states have (on average 2.3819444444444446) internal successors, (2058), 864 states have internal predecessors, (2058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:04:00,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 2058 transitions. [2021-05-03 15:04:00,292 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 2058 transitions. Word has length 29 [2021-05-03 15:04:00,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:04:00,292 INFO L480 AbstractCegarLoop]: Abstraction has 865 states and 2058 transitions. [2021-05-03 15:04:00,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 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) [2021-05-03 15:04:00,292 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 2058 transitions. [2021-05-03 15:04:00,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:04:00,293 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:04:00,293 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:04:00,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-05-03 15:04:00,508 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:04:00,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:04:00,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1188955326, now seen corresponding path program 28 times [2021-05-03 15:04:00,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:04:00,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158923610] [2021-05-03 15:04:00,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:04:00,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:04:00,824 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:04:00,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158923610] [2021-05-03 15:04:00,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300231589] [2021-05-03 15:04:00,825 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 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 [2021-05-03 15:04:00,845 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:04:00,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:04:00,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:04:00,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:04:00,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 15:04:00,992 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:04:00,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:04:00,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:04:00,999 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:13 [2021-05-03 15:04:01,051 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:04:01,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:04:01,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-05-03 15:04:01,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151009553] [2021-05-03 15:04:01,052 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 15:04:01,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:04:01,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 15:04:01,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-05-03 15:04:01,053 INFO L87 Difference]: Start difference. First operand 865 states and 2058 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 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) [2021-05-03 15:04:02,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:04:02,548 INFO L93 Difference]: Finished difference Result 2135 states and 5176 transitions. [2021-05-03 15:04:02,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 15:04:02,548 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 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 [2021-05-03 15:04:02,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:04:02,551 INFO L225 Difference]: With dead ends: 2135 [2021-05-03 15:04:02,551 INFO L226 Difference]: Without dead ends: 2114 [2021-05-03 15:04:02,552 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 1197.4ms TimeCoverageRelationStatistics Valid=323, Invalid=1083, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 15:04:02,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2114 states. [2021-05-03 15:04:02,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2114 to 833. [2021-05-03 15:04:02,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 2.373798076923077) internal successors, (1975), 832 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:04:02,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1975 transitions. [2021-05-03 15:04:02,569 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1975 transitions. Word has length 29 [2021-05-03 15:04:02,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:04:02,569 INFO L480 AbstractCegarLoop]: Abstraction has 833 states and 1975 transitions. [2021-05-03 15:04:02,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 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) [2021-05-03 15:04:02,570 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1975 transitions. [2021-05-03 15:04:02,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:04:02,571 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:04:02,571 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:04:02,771 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:04:02,771 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:04:02,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:04:02,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1958681432, now seen corresponding path program 29 times [2021-05-03 15:04:02,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:04:02,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106567484] [2021-05-03 15:04:02,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:04:02,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:04:03,111 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:04:03,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106567484] [2021-05-03 15:04:03,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280481969] [2021-05-03 15:04:03,112 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 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 [2021-05-03 15:04:03,131 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 15:04:03,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:04:03,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:04:03,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:04:03,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 15:04:03,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:04:03,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:04:03,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:04:03,312 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-05-03 15:04:03,343 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:04:03,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:04:03,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-05-03 15:04:03,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792399724] [2021-05-03 15:04:03,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 15:04:03,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:04:03,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 15:04:03,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-05-03 15:04:03,345 INFO L87 Difference]: Start difference. First operand 833 states and 1975 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 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) [2021-05-03 15:04:05,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:04:05,186 INFO L93 Difference]: Finished difference Result 1995 states and 4831 transitions. [2021-05-03 15:04:05,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 15:04:05,186 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 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 [2021-05-03 15:04:05,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:04:05,189 INFO L225 Difference]: With dead ends: 1995 [2021-05-03 15:04:05,189 INFO L226 Difference]: Without dead ends: 1972 [2021-05-03 15:04:05,190 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 1369.6ms TimeCoverageRelationStatistics Valid=334, Invalid=1226, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 15:04:05,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1972 states. [2021-05-03 15:04:05,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1972 to 824. [2021-05-03 15:04:05,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 823 states have (on average 2.3718104495747268) internal successors, (1952), 823 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:04:05,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 1952 transitions. [2021-05-03 15:04:05,206 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 1952 transitions. Word has length 29 [2021-05-03 15:04:05,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:04:05,206 INFO L480 AbstractCegarLoop]: Abstraction has 824 states and 1952 transitions. [2021-05-03 15:04:05,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 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) [2021-05-03 15:04:05,206 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 1952 transitions. [2021-05-03 15:04:05,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:04:05,208 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:04:05,208 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:04:05,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:04:05,408 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:04:05,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:04:05,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1911744554, now seen corresponding path program 30 times [2021-05-03 15:04:05,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:04:05,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406678091] [2021-05-03 15:04:05,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:04:05,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:04:05,653 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:04:05,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406678091] [2021-05-03 15:04:05,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514998720] [2021-05-03 15:04:05,653 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 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 [2021-05-03 15:04:05,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 15:04:05,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:04:05,680 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:04:05,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:04:05,961 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:04:05,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 35 [2021-05-03 15:04:05,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:04:05,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:04:06,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:04:06,025 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:192 [2021-05-03 15:04:06,158 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2021-05-03 15:04:06,350 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:04:06,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:04:06,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-05-03 15:04:06,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340075705] [2021-05-03 15:04:06,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 15:04:06,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:04:06,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 15:04:06,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-05-03 15:04:06,352 INFO L87 Difference]: Start difference. First operand 824 states and 1952 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 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) [2021-05-03 15:04:07,423 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-05-03 15:04:08,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:04:08,529 INFO L93 Difference]: Finished difference Result 2137 states and 5234 transitions. [2021-05-03 15:04:08,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 15:04:08,529 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 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 [2021-05-03 15:04:08,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:04:08,533 INFO L225 Difference]: With dead ends: 2137 [2021-05-03 15:04:08,533 INFO L226 Difference]: Without dead ends: 2126 [2021-05-03 15:04:08,533 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 2072.4ms TimeCoverageRelationStatistics Valid=402, Invalid=2048, Unknown=0, NotChecked=0, Total=2450 [2021-05-03 15:04:08,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2126 states. [2021-05-03 15:04:08,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2126 to 860. [2021-05-03 15:04:08,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 2.383003492433062) internal successors, (2047), 859 states have internal predecessors, (2047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:04:08,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2047 transitions. [2021-05-03 15:04:08,550 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2047 transitions. Word has length 29 [2021-05-03 15:04:08,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:04:08,550 INFO L480 AbstractCegarLoop]: Abstraction has 860 states and 2047 transitions. [2021-05-03 15:04:08,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 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) [2021-05-03 15:04:08,550 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2047 transitions. [2021-05-03 15:04:08,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:04:08,552 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:04:08,552 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:04:08,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-05-03 15:04:08,753 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:04:08,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:04:08,753 INFO L82 PathProgramCache]: Analyzing trace with hash -626821692, now seen corresponding path program 31 times [2021-05-03 15:04:08,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:04:08,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022842657] [2021-05-03 15:04:08,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:04:08,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:04:09,002 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:04:09,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022842657] [2021-05-03 15:04:09,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521522768] [2021-05-03 15:04:09,003 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 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 [2021-05-03 15:04:09,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:04:09,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:04:09,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:04:09,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 15:04:09,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:04:09,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:04:09,194 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:04:09,195 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:13 [2021-05-03 15:04:09,224 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:04:09,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:04:09,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 18 [2021-05-03 15:04:09,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168133086] [2021-05-03 15:04:09,225 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 15:04:09,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:04:09,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 15:04:09,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:04:09,226 INFO L87 Difference]: Start difference. First operand 860 states and 2047 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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) [2021-05-03 15:04:10,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:04:10,510 INFO L93 Difference]: Finished difference Result 2361 states and 5775 transitions. [2021-05-03 15:04:10,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 15:04:10,511 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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 29 [2021-05-03 15:04:10,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:04:10,515 INFO L225 Difference]: With dead ends: 2361 [2021-05-03 15:04:10,515 INFO L226 Difference]: Without dead ends: 2341 [2021-05-03 15:04:10,515 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 896.8ms TimeCoverageRelationStatistics Valid=244, Invalid=878, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 15:04:10,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2341 states. [2021-05-03 15:04:10,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2341 to 878. [2021-05-03 15:04:10,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 877 states have (on average 2.3865450399087798) internal successors, (2093), 877 states have internal predecessors, (2093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:04:10,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 2093 transitions. [2021-05-03 15:04:10,534 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 2093 transitions. Word has length 29 [2021-05-03 15:04:10,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:04:10,534 INFO L480 AbstractCegarLoop]: Abstraction has 878 states and 2093 transitions. [2021-05-03 15:04:10,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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) [2021-05-03 15:04:10,534 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 2093 transitions. [2021-05-03 15:04:10,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:04:10,536 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:04:10,536 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:04:10,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:04:10,736 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:04:10,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:04:10,737 INFO L82 PathProgramCache]: Analyzing trace with hash 2096805692, now seen corresponding path program 32 times [2021-05-03 15:04:10,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:04:10,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6356040] [2021-05-03 15:04:10,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:04:10,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:04:11,047 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:04:11,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6356040] [2021-05-03 15:04:11,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878719345] [2021-05-03 15:04:11,047 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 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 [2021-05-03 15:04:11,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:04:11,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:04:11,074 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:04:11,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:04:11,270 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:04:11,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-05-03 15:04:11,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:04:11,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:04:11,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:04:11,299 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:32 [2021-05-03 15:04:11,423 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:04:11,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:04:11,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-05-03 15:04:11,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476575956] [2021-05-03 15:04:11,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 15:04:11,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:04:11,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 15:04:11,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2021-05-03 15:04:11,425 INFO L87 Difference]: Start difference. First operand 878 states and 2093 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 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) [2021-05-03 15:04:13,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:04:13,544 INFO L93 Difference]: Finished difference Result 2298 states and 5548 transitions. [2021-05-03 15:04:13,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 15:04:13,545 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 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 [2021-05-03 15:04:13,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:04:13,548 INFO L225 Difference]: With dead ends: 2298 [2021-05-03 15:04:13,549 INFO L226 Difference]: Without dead ends: 2278 [2021-05-03 15:04:13,549 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1666.5ms TimeCoverageRelationStatistics Valid=418, Invalid=1304, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 15:04:13,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2278 states. [2021-05-03 15:04:13,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2278 to 863. [2021-05-03 15:04:13,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 2.3816705336426915) internal successors, (2053), 862 states have internal predecessors, (2053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:04:13,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 2053 transitions. [2021-05-03 15:04:13,565 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 2053 transitions. Word has length 29 [2021-05-03 15:04:13,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:04:13,565 INFO L480 AbstractCegarLoop]: Abstraction has 863 states and 2053 transitions. [2021-05-03 15:04:13,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 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) [2021-05-03 15:04:13,565 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 2053 transitions. [2021-05-03 15:04:13,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:04:13,567 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:04:13,567 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:04:13,767 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-05-03 15:04:13,767 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:04:13,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:04:13,767 INFO L82 PathProgramCache]: Analyzing trace with hash 783560668, now seen corresponding path program 33 times [2021-05-03 15:04:13,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:04:13,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112063003] [2021-05-03 15:04:13,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:04:13,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:04:14,032 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:04:14,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112063003] [2021-05-03 15:04:14,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508203164] [2021-05-03 15:04:14,032 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 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 [2021-05-03 15:04:14,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 15:04:14,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:04:14,053 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:04:14,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:04:14,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 15:04:14,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:04:14,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:04:14,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:04:14,289 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-05-03 15:04:14,315 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:04:14,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:04:14,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2021-05-03 15:04:14,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386128832] [2021-05-03 15:04:14,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 15:04:14,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:04:14,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 15:04:14,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:04:14,317 INFO L87 Difference]: Start difference. First operand 863 states and 2053 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 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) [2021-05-03 15:04:15,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:04:15,450 INFO L93 Difference]: Finished difference Result 2024 states and 4904 transitions. [2021-05-03 15:04:15,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 15:04:15,451 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 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 [2021-05-03 15:04:15,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:04:15,454 INFO L225 Difference]: With dead ends: 2024 [2021-05-03 15:04:15,454 INFO L226 Difference]: Without dead ends: 2014 [2021-05-03 15:04:15,454 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 818.7ms TimeCoverageRelationStatistics Valid=201, Invalid=791, Unknown=0, NotChecked=0, Total=992 [2021-05-03 15:04:15,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2014 states. [2021-05-03 15:04:15,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2014 to 860. [2021-05-03 15:04:15,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 2.3818393480791618) internal successors, (2046), 859 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:04:15,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2046 transitions. [2021-05-03 15:04:15,470 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2046 transitions. Word has length 29 [2021-05-03 15:04:15,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:04:15,470 INFO L480 AbstractCegarLoop]: Abstraction has 860 states and 2046 transitions. [2021-05-03 15:04:15,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 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) [2021-05-03 15:04:15,470 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2046 transitions. [2021-05-03 15:04:15,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:04:15,471 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:04:15,471 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:04:15,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:04:15,672 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:04:15,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:04:15,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1396239190, now seen corresponding path program 34 times [2021-05-03 15:04:15,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:04:15,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288660329] [2021-05-03 15:04:15,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:04:15,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:04:15,932 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:04:15,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288660329] [2021-05-03 15:04:15,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787540486] [2021-05-03 15:04:15,933 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 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 [2021-05-03 15:04:15,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:04:15,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:04:15,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:04:15,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:04:16,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 15:04:16,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:04:16,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:04:16,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:04:16,099 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:13 [2021-05-03 15:04:16,126 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:04:16,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:04:16,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 18 [2021-05-03 15:04:16,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522870312] [2021-05-03 15:04:16,127 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 15:04:16,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:04:16,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 15:04:16,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:04:16,128 INFO L87 Difference]: Start difference. First operand 860 states and 2046 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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) [2021-05-03 15:04:17,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:04:17,395 INFO L93 Difference]: Finished difference Result 2251 states and 5520 transitions. [2021-05-03 15:04:17,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 15:04:17,396 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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 29 [2021-05-03 15:04:17,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:04:17,399 INFO L225 Difference]: With dead ends: 2251 [2021-05-03 15:04:17,400 INFO L226 Difference]: Without dead ends: 2236 [2021-05-03 15:04:17,400 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 835.6ms TimeCoverageRelationStatistics Valid=208, Invalid=848, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 15:04:17,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2236 states. [2021-05-03 15:04:17,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2236 to 844. [2021-05-03 15:04:17,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 843 states have (on average 2.377224199288256) internal successors, (2004), 843 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:04:17,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 2004 transitions. [2021-05-03 15:04:17,424 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 2004 transitions. Word has length 29 [2021-05-03 15:04:17,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:04:17,424 INFO L480 AbstractCegarLoop]: Abstraction has 844 states and 2004 transitions. [2021-05-03 15:04:17,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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) [2021-05-03 15:04:17,424 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 2004 transitions. [2021-05-03 15:04:17,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:04:17,425 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:04:17,426 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:04:17,626 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:04:17,626 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:04:17,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:04:17,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1211178052, now seen corresponding path program 35 times [2021-05-03 15:04:17,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:04:17,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408563913] [2021-05-03 15:04:17,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:04:17,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:04:17,902 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:04:17,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408563913] [2021-05-03 15:04:17,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340871585] [2021-05-03 15:04:17,903 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 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 [2021-05-03 15:04:17,926 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 15:04:17,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:04:17,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:04:17,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:04:18,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 15:04:18,103 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:04:18,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:04:18,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:04:18,109 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-05-03 15:04:18,137 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:04:18,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:04:18,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-05-03 15:04:18,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13664038] [2021-05-03 15:04:18,137 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 15:04:18,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:04:18,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 15:04:18,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-05-03 15:04:18,138 INFO L87 Difference]: Start difference. First operand 844 states and 2004 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 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) [2021-05-03 15:04:19,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:04:19,744 INFO L93 Difference]: Finished difference Result 2149 states and 5171 transitions. [2021-05-03 15:04:19,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 15:04:19,745 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 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 [2021-05-03 15:04:19,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:04:19,751 INFO L225 Difference]: With dead ends: 2149 [2021-05-03 15:04:19,752 INFO L226 Difference]: Without dead ends: 2126 [2021-05-03 15:04:19,752 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 1047.8ms TimeCoverageRelationStatistics Valid=260, Invalid=1000, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 15:04:19,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2126 states. [2021-05-03 15:04:19,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2126 to 824. [2021-05-03 15:04:19,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 823 states have (on average 2.3718104495747268) internal successors, (1952), 823 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:04:19,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 1952 transitions. [2021-05-03 15:04:19,769 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 1952 transitions. Word has length 29 [2021-05-03 15:04:19,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:04:19,769 INFO L480 AbstractCegarLoop]: Abstraction has 824 states and 1952 transitions. [2021-05-03 15:04:19,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 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) [2021-05-03 15:04:19,769 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 1952 transitions. [2021-05-03 15:04:19,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:04:19,770 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:04:19,770 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:04:19,971 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-05-03 15:04:19,971 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:04:19,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:04:19,971 INFO L82 PathProgramCache]: Analyzing trace with hash -2108871402, now seen corresponding path program 36 times [2021-05-03 15:04:19,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:04:19,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025377692] [2021-05-03 15:04:19,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:04:19,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:04:20,216 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:04:20,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025377692] [2021-05-03 15:04:20,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518045801] [2021-05-03 15:04:20,216 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:04:20,235 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 15:04:20,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:04:20,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:04:20,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:04:20,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:04:20,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-05-03 15:04:20,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:04:20,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:04:20,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:04:20,470 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:9 [2021-05-03 15:04:20,508 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:04:20,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:04:20,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-05-03 15:04:20,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268792062] [2021-05-03 15:04:20,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 15:04:20,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:04:20,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 15:04:20,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:04:20,509 INFO L87 Difference]: Start difference. First operand 824 states and 1952 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 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) [2021-05-03 15:04:22,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:04:22,255 INFO L93 Difference]: Finished difference Result 2144 states and 5261 transitions. [2021-05-03 15:04:22,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 15:04:22,256 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 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 [2021-05-03 15:04:22,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:04:22,260 INFO L225 Difference]: With dead ends: 2144 [2021-05-03 15:04:22,260 INFO L226 Difference]: Without dead ends: 2135 [2021-05-03 15:04:22,260 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 977.2ms TimeCoverageRelationStatistics Valid=195, Invalid=1065, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 15:04:22,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2135 states. [2021-05-03 15:04:22,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2135 to 846. [2021-05-03 15:04:22,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 845 states have (on average 2.3775147928994085) internal successors, (2009), 845 states have internal predecessors, (2009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:04:22,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 2009 transitions. [2021-05-03 15:04:22,280 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 2009 transitions. Word has length 29 [2021-05-03 15:04:22,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:04:22,280 INFO L480 AbstractCegarLoop]: Abstraction has 846 states and 2009 transitions. [2021-05-03 15:04:22,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 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) [2021-05-03 15:04:22,280 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 2009 transitions. [2021-05-03 15:04:22,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:04:22,282 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:04:22,282 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:04:22,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:04:22,496 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:04:22,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:04:22,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1035195088, now seen corresponding path program 37 times [2021-05-03 15:04:22,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:04:22,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747567617] [2021-05-03 15:04:22,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:04:22,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:04:22,802 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:04:22,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747567617] [2021-05-03 15:04:22,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051134934] [2021-05-03 15:04:22,802 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 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 [2021-05-03 15:04:22,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:04:22,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:04:22,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:04:22,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:04:22,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-05-03 15:04:22,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:04:23,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:04:23,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:04:23,004 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-05-03 15:04:23,054 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:04:23,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:04:23,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-05-03 15:04:23,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37613566] [2021-05-03 15:04:23,055 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 15:04:23,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:04:23,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 15:04:23,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-05-03 15:04:23,056 INFO L87 Difference]: Start difference. First operand 846 states and 2009 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-05-03 15:04:24,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:04:24,329 INFO L93 Difference]: Finished difference Result 2161 states and 5322 transitions. [2021-05-03 15:04:24,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 15:04:24,330 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 [2021-05-03 15:04:24,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:04:24,333 INFO L225 Difference]: With dead ends: 2161 [2021-05-03 15:04:24,333 INFO L226 Difference]: Without dead ends: 2150 [2021-05-03 15:04:24,334 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 905.3ms TimeCoverageRelationStatistics Valid=207, Invalid=915, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 15:04:24,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2150 states. [2021-05-03 15:04:24,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2150 to 858. [2021-05-03 15:04:24,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 2.379229871645274) internal successors, (2039), 857 states have internal predecessors, (2039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:04:24,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 2039 transitions. [2021-05-03 15:04:24,351 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 2039 transitions. Word has length 29 [2021-05-03 15:04:24,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:04:24,351 INFO L480 AbstractCegarLoop]: Abstraction has 858 states and 2039 transitions. [2021-05-03 15:04:24,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-05-03 15:04:24,352 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 2039 transitions. [2021-05-03 15:04:24,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:04:24,353 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:04:24,353 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:04:24,557 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:04:24,557 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:04:24,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:04:24,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1169996496, now seen corresponding path program 38 times [2021-05-03 15:04:24,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:04:24,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844703397] [2021-05-03 15:04:24,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:04:24,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:04:24,848 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:04:24,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844703397] [2021-05-03 15:04:24,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727514443] [2021-05-03 15:04:24,848 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 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 [2021-05-03 15:04:24,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:04:24,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:04:24,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:04:24,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:04:25,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-05-03 15:04:25,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:04:25,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:04:25,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:04:25,065 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-05-03 15:04:25,105 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:04:25,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:04:25,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-05-03 15:04:25,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726632623] [2021-05-03 15:04:25,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 15:04:25,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:04:25,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 15:04:25,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-05-03 15:04:25,108 INFO L87 Difference]: Start difference. First operand 858 states and 2039 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-05-03 15:04:26,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:04:26,226 INFO L93 Difference]: Finished difference Result 2231 states and 5485 transitions. [2021-05-03 15:04:26,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 15:04:26,227 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 [2021-05-03 15:04:26,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:04:26,231 INFO L225 Difference]: With dead ends: 2231 [2021-05-03 15:04:26,231 INFO L226 Difference]: Without dead ends: 2211 [2021-05-03 15:04:26,232 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 892.3ms TimeCoverageRelationStatistics Valid=199, Invalid=857, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 15:04:26,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2211 states. [2021-05-03 15:04:26,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2211 to 837. [2021-05-03 15:04:26,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 836 states have (on average 2.374401913875598) internal successors, (1985), 836 states have internal predecessors, (1985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:04:26,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1985 transitions. [2021-05-03 15:04:26,259 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1985 transitions. Word has length 29 [2021-05-03 15:04:26,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:04:26,259 INFO L480 AbstractCegarLoop]: Abstraction has 837 states and 1985 transitions. [2021-05-03 15:04:26,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-05-03 15:04:26,259 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1985 transitions. [2021-05-03 15:04:26,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:04:26,260 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:04:26,260 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:04:26,461 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:04:26,461 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:04:26,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:04:26,462 INFO L82 PathProgramCache]: Analyzing trace with hash -476095038, now seen corresponding path program 39 times [2021-05-03 15:04:26,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:04:26,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716690240] [2021-05-03 15:04:26,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:04:26,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:04:26,845 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:04:26,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716690240] [2021-05-03 15:04:26,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677174399] [2021-05-03 15:04:26,846 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 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 [2021-05-03 15:04:26,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 15:04:26,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:04:26,868 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:04:26,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:04:27,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:04:27,043 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 25 treesize of output 13 [2021-05-03 15:04:27,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:04:27,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:04:27,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:04:27,052 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:15 [2021-05-03 15:04:27,116 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:04:27,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:04:27,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-05-03 15:04:27,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347540330] [2021-05-03 15:04:27,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 15:04:27,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:04:27,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 15:04:27,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:04:27,118 INFO L87 Difference]: Start difference. First operand 837 states and 1985 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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) [2021-05-03 15:04:28,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:04:28,516 INFO L93 Difference]: Finished difference Result 2169 states and 5328 transitions. [2021-05-03 15:04:28,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 15:04:28,517 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 [2021-05-03 15:04:28,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:04:28,520 INFO L225 Difference]: With dead ends: 2169 [2021-05-03 15:04:28,521 INFO L226 Difference]: Without dead ends: 2158 [2021-05-03 15:04:28,521 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 1138.1ms TimeCoverageRelationStatistics Valid=272, Invalid=1134, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 15:04:28,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2158 states. [2021-05-03 15:04:28,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2158 to 858. [2021-05-03 15:04:28,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 2.379229871645274) internal successors, (2039), 857 states have internal predecessors, (2039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:04:28,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 2039 transitions. [2021-05-03 15:04:28,542 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 2039 transitions. Word has length 29 [2021-05-03 15:04:28,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:04:28,544 INFO L480 AbstractCegarLoop]: Abstraction has 858 states and 2039 transitions. [2021-05-03 15:04:28,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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) [2021-05-03 15:04:28,544 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 2039 transitions. [2021-05-03 15:04:28,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:04:28,545 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:04:28,545 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:04:28,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-05-03 15:04:28,761 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:04:28,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:04:28,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1280306012, now seen corresponding path program 40 times [2021-05-03 15:04:28,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:04:28,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864086696] [2021-05-03 15:04:28,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:04:28,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:04:29,093 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:04:29,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864086696] [2021-05-03 15:04:29,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064970281] [2021-05-03 15:04:29,093 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 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 [2021-05-03 15:04:29,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:04:29,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:04:29,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:04:29,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:04:29,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:04:29,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-05-03 15:04:29,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:04:29,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:04:29,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:04:29,301 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-05-03 15:04:29,343 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:04:29,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:04:29,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-05-03 15:04:29,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358133557] [2021-05-03 15:04:29,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 15:04:29,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:04:29,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 15:04:29,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:04:29,345 INFO L87 Difference]: Start difference. First operand 858 states and 2039 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 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) [2021-05-03 15:04:30,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:04:30,937 INFO L93 Difference]: Finished difference Result 2228 states and 5468 transitions. [2021-05-03 15:04:30,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 15:04:30,938 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 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 [2021-05-03 15:04:30,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:04:30,941 INFO L225 Difference]: With dead ends: 2228 [2021-05-03 15:04:30,941 INFO L226 Difference]: Without dead ends: 2208 [2021-05-03 15:04:30,942 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1155.1ms TimeCoverageRelationStatistics Valid=263, Invalid=1069, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 15:04:30,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2208 states. [2021-05-03 15:04:30,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2208 to 846. [2021-05-03 15:04:30,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 845 states have (on average 2.3763313609467454) internal successors, (2008), 845 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:04:30,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 2008 transitions. [2021-05-03 15:04:30,960 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 2008 transitions. Word has length 29 [2021-05-03 15:04:30,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:04:30,960 INFO L480 AbstractCegarLoop]: Abstraction has 846 states and 2008 transitions. [2021-05-03 15:04:30,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 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) [2021-05-03 15:04:30,961 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 2008 transitions. [2021-05-03 15:04:30,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:04:30,962 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:04:30,962 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:04:31,168 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:04:31,169 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:04:31,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:04:31,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1485707216, now seen corresponding path program 41 times [2021-05-03 15:04:31,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:04:31,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155906119] [2021-05-03 15:04:31,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:04:31,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:04:31,488 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:04:31,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155906119] [2021-05-03 15:04:31,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388893307] [2021-05-03 15:04:31,488 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 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 [2021-05-03 15:04:31,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 15:04:31,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:04:31,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:04:31,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:04:31,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-05-03 15:04:31,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:04:31,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:04:31,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:04:31,699 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-05-03 15:04:31,736 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:04:31,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:04:31,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-05-03 15:04:31,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89936981] [2021-05-03 15:04:31,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 15:04:31,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:04:31,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 15:04:31,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:04:31,737 INFO L87 Difference]: Start difference. First operand 846 states and 2008 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 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) [2021-05-03 15:04:33,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:04:33,492 INFO L93 Difference]: Finished difference Result 1958 states and 4753 transitions. [2021-05-03 15:04:33,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 15:04:33,492 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 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 [2021-05-03 15:04:33,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:04:33,495 INFO L225 Difference]: With dead ends: 1958 [2021-05-03 15:04:33,495 INFO L226 Difference]: Without dead ends: 1935 [2021-05-03 15:04:33,496 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 1178.6ms TimeCoverageRelationStatistics Valid=248, Invalid=1234, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 15:04:33,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1935 states. [2021-05-03 15:04:33,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1935 to 828. [2021-05-03 15:04:33,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 827 states have (on average 2.3712212817412333) internal successors, (1961), 827 states have internal predecessors, (1961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:04:33,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1961 transitions. [2021-05-03 15:04:33,514 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1961 transitions. Word has length 29 [2021-05-03 15:04:33,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:04:33,514 INFO L480 AbstractCegarLoop]: Abstraction has 828 states and 1961 transitions. [2021-05-03 15:04:33,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 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) [2021-05-03 15:04:33,514 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1961 transitions. [2021-05-03 15:04:33,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:04:33,515 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:04:33,515 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:04:33,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:04:33,729 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:04:33,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:04:33,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1983699818, now seen corresponding path program 42 times [2021-05-03 15:04:33,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:04:33,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544069256] [2021-05-03 15:04:33,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:04:33,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:04:34,002 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:04:34,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544069256] [2021-05-03 15:04:34,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347531163] [2021-05-03 15:04:34,003 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 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 [2021-05-03 15:04:34,023 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 15:04:34,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:04:34,024 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:04:34,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:04:34,336 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:04:34,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-05-03 15:04:34,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:04:34,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:04:34,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:04:34,390 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:133 [2021-05-03 15:04:34,744 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-05-03 15:04:34,803 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:04:34,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:04:34,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-05-03 15:04:34,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024813589] [2021-05-03 15:04:34,804 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 15:04:34,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:04:34,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 15:04:34,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-05-03 15:04:34,805 INFO L87 Difference]: Start difference. First operand 828 states and 1961 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 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) [2021-05-03 15:04:37,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:04:37,201 INFO L93 Difference]: Finished difference Result 2172 states and 5333 transitions. [2021-05-03 15:04:37,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-03 15:04:37,202 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 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 [2021-05-03 15:04:37,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:04:37,206 INFO L225 Difference]: With dead ends: 2172 [2021-05-03 15:04:37,206 INFO L226 Difference]: Without dead ends: 2161 [2021-05-03 15:04:37,207 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 2169.8ms TimeCoverageRelationStatistics Valid=400, Invalid=2150, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 15:04:37,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2161 states. [2021-05-03 15:04:37,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2161 to 868. [2021-05-03 15:04:37,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 2.381776239907728) internal successors, (2065), 867 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:04:37,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 2065 transitions. [2021-05-03 15:04:37,227 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 2065 transitions. Word has length 29 [2021-05-03 15:04:37,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:04:37,227 INFO L480 AbstractCegarLoop]: Abstraction has 868 states and 2065 transitions. [2021-05-03 15:04:37,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 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) [2021-05-03 15:04:37,227 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 2065 transitions. [2021-05-03 15:04:37,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:04:37,229 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:04:37,229 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:04:37,447 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:04:37,448 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:04:37,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:04:37,448 INFO L82 PathProgramCache]: Analyzing trace with hash -227298768, now seen corresponding path program 43 times [2021-05-03 15:04:37,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:04:37,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528731647] [2021-05-03 15:04:37,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:04:37,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:04:37,740 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:04:37,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528731647] [2021-05-03 15:04:37,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934477878] [2021-05-03 15:04:37,740 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 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 [2021-05-03 15:04:37,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:04:37,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:04:37,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:04:37,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-05-03 15:04:37,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:04:37,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:04:37,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:04:37,965 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-05-03 15:04:38,004 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:04:38,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:04:38,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-05-03 15:04:38,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192009202] [2021-05-03 15:04:38,005 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 15:04:38,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:04:38,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 15:04:38,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:04:38,006 INFO L87 Difference]: Start difference. First operand 868 states and 2065 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 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) [2021-05-03 15:04:39,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:04:39,378 INFO L93 Difference]: Finished difference Result 2398 states and 5869 transitions. [2021-05-03 15:04:39,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 15:04:39,379 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 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 [2021-05-03 15:04:39,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:04:39,383 INFO L225 Difference]: With dead ends: 2398 [2021-05-03 15:04:39,383 INFO L226 Difference]: Without dead ends: 2378 [2021-05-03 15:04:39,383 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 1146.4ms TimeCoverageRelationStatistics Valid=283, Invalid=1123, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 15:04:39,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2378 states. [2021-05-03 15:04:39,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2378 to 858. [2021-05-03 15:04:39,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 2.3745624270711785) internal successors, (2035), 857 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:04:39,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 2035 transitions. [2021-05-03 15:04:39,405 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 2035 transitions. Word has length 29 [2021-05-03 15:04:39,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:04:39,405 INFO L480 AbstractCegarLoop]: Abstraction has 858 states and 2035 transitions. [2021-05-03 15:04:39,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 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) [2021-05-03 15:04:39,405 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 2035 transitions. [2021-05-03 15:04:39,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:04:39,407 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:04:39,407 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:04:39,620 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:04:39,621 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:04:39,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:04:39,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1798638680, now seen corresponding path program 44 times [2021-05-03 15:04:39,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:04:39,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299696686] [2021-05-03 15:04:39,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:04:39,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:04:39,912 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:04:39,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299696686] [2021-05-03 15:04:39,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175257509] [2021-05-03 15:04:39,912 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 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 [2021-05-03 15:04:39,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:04:39,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:04:39,936 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 15:04:39,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:04:40,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:04:40,317 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:04:40,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-05-03 15:04:40,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:04:40,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:04:40,348 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:04:40,348 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:67 [2021-05-03 15:04:40,523 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:04:40,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:04:40,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-05-03 15:04:40,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759235054] [2021-05-03 15:04:40,524 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 15:04:40,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:04:40,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 15:04:40,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-05-03 15:04:40,525 INFO L87 Difference]: Start difference. First operand 858 states and 2035 transitions. Second operand has 25 states, 25 states have (on average 2.04) 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) [2021-05-03 15:04:42,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:04:42,182 INFO L93 Difference]: Finished difference Result 2184 states and 5285 transitions. [2021-05-03 15:04:42,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 15:04:42,183 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) 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 [2021-05-03 15:04:42,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:04:42,186 INFO L225 Difference]: With dead ends: 2184 [2021-05-03 15:04:42,186 INFO L226 Difference]: Without dead ends: 2164 [2021-05-03 15:04:42,186 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1467.3ms TimeCoverageRelationStatistics Valid=269, Invalid=1213, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 15:04:42,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2164 states. [2021-05-03 15:04:42,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2164 to 843. [2021-05-03 15:04:42,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 842 states have (on average 2.369358669833729) internal successors, (1995), 842 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:04:42,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1995 transitions. [2021-05-03 15:04:42,203 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1995 transitions. Word has length 29 [2021-05-03 15:04:42,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:04:42,203 INFO L480 AbstractCegarLoop]: Abstraction has 843 states and 1995 transitions. [2021-05-03 15:04:42,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) 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) [2021-05-03 15:04:42,203 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1995 transitions. [2021-05-03 15:04:42,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:04:42,204 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:04:42,204 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:04:42,405 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-05-03 15:04:42,405 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:04:42,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:04:42,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1183083592, now seen corresponding path program 45 times [2021-05-03 15:04:42,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:04:42,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939148723] [2021-05-03 15:04:42,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:04:42,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:04:42,672 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:04:42,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939148723] [2021-05-03 15:04:42,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224173559] [2021-05-03 15:04:42,672 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 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 [2021-05-03 15:04:42,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 15:04:42,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:04:42,692 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:04:42,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:04:42,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:04:42,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-05-03 15:04:42,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:04:42,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:04:42,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:04:42,955 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:9 [2021-05-03 15:04:42,995 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:04:42,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:04:42,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-05-03 15:04:42,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957813469] [2021-05-03 15:04:42,996 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 15:04:42,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:04:42,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 15:04:42,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-05-03 15:04:42,996 INFO L87 Difference]: Start difference. First operand 843 states and 1995 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) [2021-05-03 15:04:44,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:04:44,047 INFO L93 Difference]: Finished difference Result 1963 states and 4750 transitions. [2021-05-03 15:04:44,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 15:04:44,048 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 [2021-05-03 15:04:44,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:04:44,051 INFO L225 Difference]: With dead ends: 1963 [2021-05-03 15:04:44,051 INFO L226 Difference]: Without dead ends: 1953 [2021-05-03 15:04:44,051 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 859.3ms TimeCoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 15:04:44,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953 states. [2021-05-03 15:04:44,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953 to 837. [2021-05-03 15:04:44,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 836 states have (on average 2.3696172248803826) internal successors, (1981), 836 states have internal predecessors, (1981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:04:44,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1981 transitions. [2021-05-03 15:04:44,069 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1981 transitions. Word has length 29 [2021-05-03 15:04:44,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:04:44,069 INFO L480 AbstractCegarLoop]: Abstraction has 837 states and 1981 transitions. [2021-05-03 15:04:44,069 INFO L481 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) [2021-05-03 15:04:44,069 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1981 transitions. [2021-05-03 15:04:44,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:04:44,071 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:04:44,071 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:04:44,284 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:04:44,285 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:04:44,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:04:44,285 INFO L82 PathProgramCache]: Analyzing trace with hash -644766292, now seen corresponding path program 46 times [2021-05-03 15:04:44,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:04:44,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711699753] [2021-05-03 15:04:44,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:04:44,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:04:44,637 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:04:44,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711699753] [2021-05-03 15:04:44,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702228921] [2021-05-03 15:04:44,638 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) [2021-05-03 15:04:44,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:04:44,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:04:44,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:04:44,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:04:44,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-05-03 15:04:44,909 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:04:44,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:04:44,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:04:44,914 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-05-03 15:04:44,956 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:04:44,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:04:44,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-05-03 15:04:44,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111010538] [2021-05-03 15:04:44,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 15:04:44,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:04:44,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 15:04:44,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:04:44,958 INFO L87 Difference]: Start difference. First operand 837 states and 1981 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:04:47,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:04:47,093 INFO L93 Difference]: Finished difference Result 2002 states and 4888 transitions. [2021-05-03 15:04:47,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 15:04:47,094 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 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 [2021-05-03 15:04:47,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:04:47,097 INFO L225 Difference]: With dead ends: 2002 [2021-05-03 15:04:47,097 INFO L226 Difference]: Without dead ends: 1985 [2021-05-03 15:04:47,098 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1561.1ms TimeCoverageRelationStatistics Valid=271, Invalid=1535, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 15:04:47,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2021-05-03 15:04:47,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 858. [2021-05-03 15:04:47,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 2.371061843640607) internal successors, (2032), 857 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:04:47,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 2032 transitions. [2021-05-03 15:04:47,112 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 2032 transitions. Word has length 29 [2021-05-03 15:04:47,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:04:47,112 INFO L480 AbstractCegarLoop]: Abstraction has 858 states and 2032 transitions. [2021-05-03 15:04:47,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:04:47,112 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 2032 transitions. [2021-05-03 15:04:47,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:04:47,114 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:04:47,114 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:04:47,314 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-05-03 15:04:47,314 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:04:47,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:04:47,315 INFO L82 PathProgramCache]: Analyzing trace with hash 428910022, now seen corresponding path program 47 times [2021-05-03 15:04:47,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:04:47,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466398230] [2021-05-03 15:04:47,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:04:47,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:04:47,675 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:04:47,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466398230] [2021-05-03 15:04:47,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11326635] [2021-05-03 15:04:47,676 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) [2021-05-03 15:04:47,705 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 15:04:47,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:04:47,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:04:47,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:04:47,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:04:47,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-05-03 15:04:47,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:04:47,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:04:47,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:04:47,913 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-05-03 15:04:47,979 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:04:47,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:04:47,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-05-03 15:04:47,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165223251] [2021-05-03 15:04:47,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 15:04:47,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:04:47,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 15:04:47,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:04:47,980 INFO L87 Difference]: Start difference. First operand 858 states and 2032 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:04:50,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:04:50,818 INFO L93 Difference]: Finished difference Result 2515 states and 6171 transitions. [2021-05-03 15:04:50,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-03 15:04:50,818 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 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 [2021-05-03 15:04:50,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:04:50,822 INFO L225 Difference]: With dead ends: 2515 [2021-05-03 15:04:50,822 INFO L226 Difference]: Without dead ends: 2500 [2021-05-03 15:04:50,823 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 2104.0ms TimeCoverageRelationStatistics Valid=495, Invalid=2157, Unknown=0, NotChecked=0, Total=2652 [2021-05-03 15:04:50,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2500 states. [2021-05-03 15:04:50,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2500 to 867. [2021-05-03 15:04:50,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 866 states have (on average 2.3729792147806004) internal successors, (2055), 866 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:04:50,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 2055 transitions. [2021-05-03 15:04:50,840 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 2055 transitions. Word has length 29 [2021-05-03 15:04:50,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:04:50,841 INFO L480 AbstractCegarLoop]: Abstraction has 867 states and 2055 transitions. [2021-05-03 15:04:50,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:04:50,841 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 2055 transitions. [2021-05-03 15:04:50,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:04:50,842 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:04:50,842 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:04:51,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-05-03 15:04:51,043 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:04:51,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:04:51,043 INFO L82 PathProgramCache]: Analyzing trace with hash 294108614, now seen corresponding path program 48 times [2021-05-03 15:04:51,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:04:51,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556138140] [2021-05-03 15:04:51,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:04:51,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:04:51,406 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:04:51,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556138140] [2021-05-03 15:04:51,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132628425] [2021-05-03 15:04:51,406 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 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 [2021-05-03 15:04:51,426 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 15:04:51,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:04:51,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:04:51,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:04:51,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-05-03 15:04:51,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:04:51,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:04:51,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:04:51,596 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-05-03 15:04:51,639 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:04:51,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:04:51,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-05-03 15:04:51,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244689809] [2021-05-03 15:04:51,639 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 15:04:51,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:04:51,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 15:04:51,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:04:51,640 INFO L87 Difference]: Start difference. First operand 867 states and 2055 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 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) [2021-05-03 15:04:53,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:04:53,578 INFO L93 Difference]: Finished difference Result 2120 states and 5191 transitions. [2021-05-03 15:04:53,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 15:04:53,579 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 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 [2021-05-03 15:04:53,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:04:53,582 INFO L225 Difference]: With dead ends: 2120 [2021-05-03 15:04:53,583 INFO L226 Difference]: Without dead ends: 2101 [2021-05-03 15:04:53,583 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1378.0ms TimeCoverageRelationStatistics Valid=296, Invalid=1264, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 15:04:53,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2101 states. [2021-05-03 15:04:53,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2101 to 859. [2021-05-03 15:04:53,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 2.3729603729603728) internal successors, (2036), 858 states have internal predecessors, (2036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:04:53,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 2036 transitions. [2021-05-03 15:04:53,599 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 2036 transitions. Word has length 29 [2021-05-03 15:04:53,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:04:53,599 INFO L480 AbstractCegarLoop]: Abstraction has 859 states and 2036 transitions. [2021-05-03 15:04:53,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 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) [2021-05-03 15:04:53,600 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 2036 transitions. [2021-05-03 15:04:53,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:04:53,601 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:04:53,601 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:04:53,801 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:04:53,801 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:04:53,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:04:53,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1194528790, now seen corresponding path program 49 times [2021-05-03 15:04:53,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:04:53,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649834110] [2021-05-03 15:04:53,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:04:53,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:04:54,128 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:04:54,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649834110] [2021-05-03 15:04:54,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495637193] [2021-05-03 15:04:54,128 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 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 [2021-05-03 15:04:54,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:04:54,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:04:54,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:04:54,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-05-03 15:04:54,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:04:54,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:04:54,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:04:54,343 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-05-03 15:04:54,387 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:04:54,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:04:54,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-05-03 15:04:54,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772234782] [2021-05-03 15:04:54,388 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 15:04:54,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:04:54,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 15:04:54,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-05-03 15:04:54,389 INFO L87 Difference]: Start difference. First operand 859 states and 2036 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-05-03 15:04:56,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:04:56,001 INFO L93 Difference]: Finished difference Result 2618 states and 6519 transitions. [2021-05-03 15:04:56,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 15:04:56,002 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 [2021-05-03 15:04:56,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:04:56,007 INFO L225 Difference]: With dead ends: 2618 [2021-05-03 15:04:56,007 INFO L226 Difference]: Without dead ends: 2605 [2021-05-03 15:04:56,007 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 1330.9ms TimeCoverageRelationStatistics Valid=290, Invalid=1116, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 15:04:56,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2605 states. [2021-05-03 15:04:56,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2605 to 872. [2021-05-03 15:04:56,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 2.377726750861079) internal successors, (2071), 871 states have internal predecessors, (2071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:04:56,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 2071 transitions. [2021-05-03 15:04:56,027 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 2071 transitions. Word has length 29 [2021-05-03 15:04:56,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:04:56,028 INFO L480 AbstractCegarLoop]: Abstraction has 872 states and 2071 transitions. [2021-05-03 15:04:56,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-05-03 15:04:56,028 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 2071 transitions. [2021-05-03 15:04:56,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:04:56,029 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:04:56,029 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:04:56,230 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-05-03 15:04:56,230 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:04:56,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:04:56,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1344037456, now seen corresponding path program 50 times [2021-05-03 15:04:56,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:04:56,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528343111] [2021-05-03 15:04:56,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:04:56,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:04:56,561 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:04:56,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528343111] [2021-05-03 15:04:56,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638452030] [2021-05-03 15:04:56,562 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 15:04:56,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:04:56,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:04:56,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:04:56,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:04:56,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-05-03 15:04:56,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:04:56,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:04:56,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:04:56,829 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-05-03 15:04:56,875 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:04:56,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:04:56,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-05-03 15:04:56,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177704610] [2021-05-03 15:04:56,876 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 15:04:56,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:04:56,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 15:04:56,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-05-03 15:04:56,877 INFO L87 Difference]: Start difference. First operand 872 states and 2071 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-05-03 15:04:58,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:04:58,751 INFO L93 Difference]: Finished difference Result 2318 states and 5736 transitions. [2021-05-03 15:04:58,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 15:04:58,752 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 [2021-05-03 15:04:58,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:04:58,757 INFO L225 Difference]: With dead ends: 2318 [2021-05-03 15:04:58,757 INFO L226 Difference]: Without dead ends: 2301 [2021-05-03 15:04:58,757 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1362.7ms TimeCoverageRelationStatistics Valid=278, Invalid=1054, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 15:04:58,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2021-05-03 15:04:58,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 860. [2021-05-03 15:04:58,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 2.377182770663562) internal successors, (2042), 859 states have internal predecessors, (2042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:04:58,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2042 transitions. [2021-05-03 15:04:58,776 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2042 transitions. Word has length 29 [2021-05-03 15:04:58,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:04:58,776 INFO L480 AbstractCegarLoop]: Abstraction has 860 states and 2042 transitions. [2021-05-03 15:04:58,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-05-03 15:04:58,776 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2042 transitions. [2021-05-03 15:04:58,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:04:58,785 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:04:58,785 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:04:58,993 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-05-03 15:04:58,993 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:04:58,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:04:58,993 INFO L82 PathProgramCache]: Analyzing trace with hash 184916612, now seen corresponding path program 51 times [2021-05-03 15:04:58,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:04:58,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851348113] [2021-05-03 15:04:58,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:04:58,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:04:59,304 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:04:59,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851348113] [2021-05-03 15:04:59,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722585985] [2021-05-03 15:04:59,305 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 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 [2021-05-03 15:04:59,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 15:04:59,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:04:59,326 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:04:59,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:04:59,677 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:04:59,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-05-03 15:04:59,684 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:04:59,717 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:04:59,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:04:59,728 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:130 [2021-05-03 15:04:59,866 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 15:05:00,174 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-05-03 15:05:00,217 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:05:00,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:05:00,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-05-03 15:05:00,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694438754] [2021-05-03 15:05:00,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 15:05:00,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:05:00,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 15:05:00,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-05-03 15:05:00,218 INFO L87 Difference]: Start difference. First operand 860 states and 2042 transitions. Second operand has 25 states, 25 states have (on average 2.04) 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) [2021-05-03 15:05:03,446 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2021-05-03 15:05:03,611 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2021-05-03 15:05:05,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:05:05,256 INFO L93 Difference]: Finished difference Result 2092 states and 5108 transitions. [2021-05-03 15:05:05,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-03 15:05:05,261 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) 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 [2021-05-03 15:05:05,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:05:05,265 INFO L225 Difference]: With dead ends: 2092 [2021-05-03 15:05:05,265 INFO L226 Difference]: Without dead ends: 2079 [2021-05-03 15:05:05,265 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 3925.1ms TimeCoverageRelationStatistics Valid=462, Invalid=3320, Unknown=0, NotChecked=0, Total=3782 [2021-05-03 15:05:05,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2079 states. [2021-05-03 15:05:05,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2079 to 864. [2021-05-03 15:05:05,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 2.3800695249130936) internal successors, (2054), 863 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:05:05,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2054 transitions. [2021-05-03 15:05:05,281 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2054 transitions. Word has length 29 [2021-05-03 15:05:05,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:05:05,281 INFO L480 AbstractCegarLoop]: Abstraction has 864 states and 2054 transitions. [2021-05-03 15:05:05,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) 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) [2021-05-03 15:05:05,281 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2054 transitions. [2021-05-03 15:05:05,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:05:05,283 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:05:05,283 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:05:05,483 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-05-03 15:05:05,484 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:05:05,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:05:05,484 INFO L82 PathProgramCache]: Analyzing trace with hash -586222012, now seen corresponding path program 52 times [2021-05-03 15:05:05,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:05:05,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978024737] [2021-05-03 15:05:05,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:05:05,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:05:05,818 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:05:05,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978024737] [2021-05-03 15:05:05,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449284569] [2021-05-03 15:05:05,819 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 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 [2021-05-03 15:05:05,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:05:05,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:05:05,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:05:05,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:05:06,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-05-03 15:05:06,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:05:06,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:05:06,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:05:06,114 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-05-03 15:05:06,159 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:05:06,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:05:06,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-05-03 15:05:06,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894306524] [2021-05-03 15:05:06,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 15:05:06,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:05:06,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 15:05:06,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:05:06,160 INFO L87 Difference]: Start difference. First operand 864 states and 2054 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 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) [2021-05-03 15:05:08,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:05:08,170 INFO L93 Difference]: Finished difference Result 2146 states and 5242 transitions. [2021-05-03 15:05:08,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 15:05:08,172 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 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 [2021-05-03 15:05:08,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:05:08,175 INFO L225 Difference]: With dead ends: 2146 [2021-05-03 15:05:08,175 INFO L226 Difference]: Without dead ends: 2136 [2021-05-03 15:05:08,175 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 1237.4ms TimeCoverageRelationStatistics Valid=262, Invalid=1144, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 15:05:08,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2136 states. [2021-05-03 15:05:08,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2136 to 857. [2021-05-03 15:05:08,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 2.3773364485981308) internal successors, (2035), 856 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:05:08,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 2035 transitions. [2021-05-03 15:05:08,190 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 2035 transitions. Word has length 29 [2021-05-03 15:05:08,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:05:08,190 INFO L480 AbstractCegarLoop]: Abstraction has 857 states and 2035 transitions. [2021-05-03 15:05:08,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 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) [2021-05-03 15:05:08,191 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 2035 transitions. [2021-05-03 15:05:08,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:05:08,192 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:05:08,192 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:05:08,392 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:05:08,393 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:05:08,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:05:08,393 INFO L82 PathProgramCache]: Analyzing trace with hash -989153706, now seen corresponding path program 53 times [2021-05-03 15:05:08,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:05:08,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314248172] [2021-05-03 15:05:08,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:05:08,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:05:08,784 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:05:08,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314248172] [2021-05-03 15:05:08,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208058380] [2021-05-03 15:05:08,785 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 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 [2021-05-03 15:05:08,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 15:05:08,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:05:08,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:05:08,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:05:09,121 INFO L354 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2021-05-03 15:05:09,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 62 [2021-05-03 15:05:09,126 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:05:09,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:05:09,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:05:09,134 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:90, output treesize:7 [2021-05-03 15:05:09,181 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:05:09,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:05:09,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-05-03 15:05:09,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666863658] [2021-05-03 15:05:09,182 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 15:05:09,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:05:09,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 15:05:09,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:05:09,183 INFO L87 Difference]: Start difference. First operand 857 states and 2035 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:05:11,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:05:11,989 INFO L93 Difference]: Finished difference Result 2191 states and 5325 transitions. [2021-05-03 15:05:11,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-03 15:05:11,990 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 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 [2021-05-03 15:05:11,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:05:11,994 INFO L225 Difference]: With dead ends: 2191 [2021-05-03 15:05:11,994 INFO L226 Difference]: Without dead ends: 2174 [2021-05-03 15:05:11,994 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 1850.6ms TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 15:05:11,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2174 states. [2021-05-03 15:05:12,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2174 to 875. [2021-05-03 15:05:12,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 2.3821510297482837) internal successors, (2082), 874 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:05:12,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 2082 transitions. [2021-05-03 15:05:12,010 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 2082 transitions. Word has length 29 [2021-05-03 15:05:12,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:05:12,010 INFO L480 AbstractCegarLoop]: Abstraction has 875 states and 2082 transitions. [2021-05-03 15:05:12,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:05:12,010 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 2082 transitions. [2021-05-03 15:05:12,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:05:12,011 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:05:12,012 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:05:12,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:05:12,212 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:05:12,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:05:12,213 INFO L82 PathProgramCache]: Analyzing trace with hash 84522608, now seen corresponding path program 54 times [2021-05-03 15:05:12,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:05:12,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708065563] [2021-05-03 15:05:12,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:05:12,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:05:12,563 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:05:12,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708065563] [2021-05-03 15:05:12,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240340147] [2021-05-03 15:05:12,563 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 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 [2021-05-03 15:05:12,584 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 15:05:12,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:05:12,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:05:12,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:05:12,849 INFO L354 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2021-05-03 15:05:12,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 96 treesize of output 62 [2021-05-03 15:05:12,853 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:05:12,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:05:12,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:05:12,861 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:96, output treesize:10 [2021-05-03 15:05:12,928 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:05:12,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:05:12,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-05-03 15:05:12,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446302429] [2021-05-03 15:05:12,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 15:05:12,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:05:12,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 15:05:12,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:05:12,930 INFO L87 Difference]: Start difference. First operand 875 states and 2082 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:05:15,094 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-05-03 15:05:16,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:05:16,019 INFO L93 Difference]: Finished difference Result 2635 states and 6476 transitions. [2021-05-03 15:05:16,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-03 15:05:16,020 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 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 [2021-05-03 15:05:16,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:05:16,025 INFO L225 Difference]: With dead ends: 2635 [2021-05-03 15:05:16,025 INFO L226 Difference]: Without dead ends: 2622 [2021-05-03 15:05:16,025 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 2527.3ms TimeCoverageRelationStatistics Valid=481, Invalid=2069, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 15:05:16,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2622 states. [2021-05-03 15:05:16,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2622 to 891. [2021-05-03 15:05:16,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 2.385393258426966) internal successors, (2123), 890 states have internal predecessors, (2123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:05:16,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 2123 transitions. [2021-05-03 15:05:16,047 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 2123 transitions. Word has length 29 [2021-05-03 15:05:16,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:05:16,047 INFO L480 AbstractCegarLoop]: Abstraction has 891 states and 2123 transitions. [2021-05-03 15:05:16,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:05:16,048 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 2123 transitions. [2021-05-03 15:05:16,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:05:16,049 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:05:16,049 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:05:16,265 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-05-03 15:05:16,265 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:05:16,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:05:16,265 INFO L82 PathProgramCache]: Analyzing trace with hash -50278800, now seen corresponding path program 55 times [2021-05-03 15:05:16,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:05:16,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279670984] [2021-05-03 15:05:16,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:05:16,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:05:16,752 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:05:16,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279670984] [2021-05-03 15:05:16,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202067168] [2021-05-03 15:05:16,753 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 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 [2021-05-03 15:05:16,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:05:16,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:05:16,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:05:17,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:05:17,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-05-03 15:05:17,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:05:17,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:05:17,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:05:17,037 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-05-03 15:05:17,087 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:05:17,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:05:17,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-05-03 15:05:17,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855406557] [2021-05-03 15:05:17,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 15:05:17,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:05:17,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 15:05:17,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:05:17,088 INFO L87 Difference]: Start difference. First operand 891 states and 2123 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 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) [2021-05-03 15:05:19,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:05:19,183 INFO L93 Difference]: Finished difference Result 2228 states and 5467 transitions. [2021-05-03 15:05:19,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 15:05:19,184 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 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 [2021-05-03 15:05:19,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:05:19,188 INFO L225 Difference]: With dead ends: 2228 [2021-05-03 15:05:19,188 INFO L226 Difference]: Without dead ends: 2210 [2021-05-03 15:05:19,188 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1640.9ms TimeCoverageRelationStatistics Valid=258, Invalid=1074, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 15:05:19,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2210 states. [2021-05-03 15:05:19,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2210 to 864. [2021-05-03 15:05:19,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 2.381228273464658) internal successors, (2055), 863 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:05:19,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2055 transitions. [2021-05-03 15:05:19,208 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2055 transitions. Word has length 29 [2021-05-03 15:05:19,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:05:19,209 INFO L480 AbstractCegarLoop]: Abstraction has 864 states and 2055 transitions. [2021-05-03 15:05:19,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 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) [2021-05-03 15:05:19,209 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2055 transitions. [2021-05-03 15:05:19,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:05:19,210 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:05:19,210 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:05:19,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:05:19,425 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:05:19,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:05:19,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1301042010, now seen corresponding path program 56 times [2021-05-03 15:05:19,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:05:19,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339803544] [2021-05-03 15:05:19,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:05:19,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:05:19,809 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:05:19,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339803544] [2021-05-03 15:05:19,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736257819] [2021-05-03 15:05:19,810 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 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 [2021-05-03 15:05:19,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:05:19,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:05:19,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:05:19,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:05:20,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-05-03 15:05:20,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:05:20,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:05:20,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:05:20,148 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-05-03 15:05:20,199 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:05:20,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:05:20,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-05-03 15:05:20,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523374604] [2021-05-03 15:05:20,200 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 15:05:20,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:05:20,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 15:05:20,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:05:20,201 INFO L87 Difference]: Start difference. First operand 864 states and 2055 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:05:21,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:05:21,913 INFO L93 Difference]: Finished difference Result 2015 states and 4908 transitions. [2021-05-03 15:05:21,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 15:05:21,914 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 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 [2021-05-03 15:05:21,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:05:21,917 INFO L225 Difference]: With dead ends: 2015 [2021-05-03 15:05:21,917 INFO L226 Difference]: Without dead ends: 2006 [2021-05-03 15:05:21,917 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 1338.2ms TimeCoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 15:05:21,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2006 states. [2021-05-03 15:05:21,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2006 to 866. [2021-05-03 15:05:21,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 2.3791907514450865) internal successors, (2058), 865 states have internal predecessors, (2058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:05:21,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2058 transitions. [2021-05-03 15:05:21,929 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2058 transitions. Word has length 29 [2021-05-03 15:05:21,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:05:21,930 INFO L480 AbstractCegarLoop]: Abstraction has 866 states and 2058 transitions. [2021-05-03 15:05:21,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:05:21,930 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2058 transitions. [2021-05-03 15:05:21,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:05:21,931 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:05:21,931 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:05:22,131 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-05-03 15:05:22,132 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:05:22,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:05:22,132 INFO L82 PathProgramCache]: Analyzing trace with hash 880815196, now seen corresponding path program 57 times [2021-05-03 15:05:22,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:05:22,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183379806] [2021-05-03 15:05:22,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:05:22,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:05:22,498 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:05:22,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183379806] [2021-05-03 15:05:22,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956832102] [2021-05-03 15:05:22,498 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 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 [2021-05-03 15:05:22,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 15:05:22,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:05:22,520 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:05:22,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:05:22,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-05-03 15:05:22,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:05:22,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:05:22,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:05:22,843 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-05-03 15:05:22,900 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:05:22,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:05:22,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-05-03 15:05:22,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907520741] [2021-05-03 15:05:22,901 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 15:05:22,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:05:22,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 15:05:22,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-05-03 15:05:22,902 INFO L87 Difference]: Start difference. First operand 866 states and 2058 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:05:24,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:05:24,685 INFO L93 Difference]: Finished difference Result 2129 states and 5184 transitions. [2021-05-03 15:05:24,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 15:05:24,686 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 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 [2021-05-03 15:05:24,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:05:24,690 INFO L225 Difference]: With dead ends: 2129 [2021-05-03 15:05:24,690 INFO L226 Difference]: Without dead ends: 2120 [2021-05-03 15:05:24,690 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1119.5ms TimeCoverageRelationStatistics Valid=198, Invalid=858, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 15:05:24,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2120 states. [2021-05-03 15:05:24,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2120 to 902. [2021-05-03 15:05:24,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 2.3773584905660377) internal successors, (2142), 901 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:05:24,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 2142 transitions. [2021-05-03 15:05:24,707 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 2142 transitions. Word has length 29 [2021-05-03 15:05:24,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:05:24,707 INFO L480 AbstractCegarLoop]: Abstraction has 902 states and 2142 transitions. [2021-05-03 15:05:24,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:05:24,707 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 2142 transitions. [2021-05-03 15:05:24,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:05:24,709 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:05:24,709 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:05:24,909 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:05:24,910 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:05:24,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:05:24,910 INFO L82 PathProgramCache]: Analyzing trace with hash 591087582, now seen corresponding path program 58 times [2021-05-03 15:05:24,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:05:24,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067813335] [2021-05-03 15:05:24,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:05:24,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:05:25,266 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:05:25,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067813335] [2021-05-03 15:05:25,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178454015] [2021-05-03 15:05:25,267 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 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 [2021-05-03 15:05:25,287 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:05:25,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:05:25,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:05:25,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:05:25,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:05:25,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-05-03 15:05:25,579 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:05:25,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:05:25,585 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:05:25,585 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:9 [2021-05-03 15:05:25,631 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:05:25,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:05:25,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-05-03 15:05:25,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191247743] [2021-05-03 15:05:25,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 15:05:25,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:05:25,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 15:05:25,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:05:25,633 INFO L87 Difference]: Start difference. First operand 902 states and 2142 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:05:27,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:05:27,673 INFO L93 Difference]: Finished difference Result 2272 states and 5520 transitions. [2021-05-03 15:05:27,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 15:05:27,674 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 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 [2021-05-03 15:05:27,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:05:27,678 INFO L225 Difference]: With dead ends: 2272 [2021-05-03 15:05:27,678 INFO L226 Difference]: Without dead ends: 2255 [2021-05-03 15:05:27,678 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 1316.9ms TimeCoverageRelationStatistics Valid=251, Invalid=939, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 15:05:27,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2255 states. [2021-05-03 15:05:27,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2255 to 920. [2021-05-03 15:05:27,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 919 states have (on average 2.381936887921654) internal successors, (2189), 919 states have internal predecessors, (2189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:05:27,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 2189 transitions. [2021-05-03 15:05:27,696 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 2189 transitions. Word has length 29 [2021-05-03 15:05:27,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:05:27,697 INFO L480 AbstractCegarLoop]: Abstraction has 920 states and 2189 transitions. [2021-05-03 15:05:27,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:05:27,697 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 2189 transitions. [2021-05-03 15:05:27,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:05:27,698 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:05:27,698 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:05:27,899 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-05-03 15:05:27,899 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:05:27,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:05:27,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1010370532, now seen corresponding path program 59 times [2021-05-03 15:05:27,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:05:27,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834330236] [2021-05-03 15:05:27,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:05:27,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:05:28,236 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:05:28,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834330236] [2021-05-03 15:05:28,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752741764] [2021-05-03 15:05:28,236 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 [2021-05-03 15:05:28,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 15:05:28,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:05:28,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:05:28,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:05:28,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:05:28,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-05-03 15:05:28,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:05:28,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:05:28,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:05:28,527 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-05-03 15:05:28,603 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:05:28,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:05:28,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-05-03 15:05:28,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680790546] [2021-05-03 15:05:28,604 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 15:05:28,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:05:28,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 15:05:28,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:05:28,605 INFO L87 Difference]: Start difference. First operand 920 states and 2189 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:05:30,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:05:30,867 INFO L93 Difference]: Finished difference Result 2706 states and 6630 transitions. [2021-05-03 15:05:30,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 15:05:30,868 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 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 [2021-05-03 15:05:30,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:05:30,872 INFO L225 Difference]: With dead ends: 2706 [2021-05-03 15:05:30,873 INFO L226 Difference]: Without dead ends: 2693 [2021-05-03 15:05:30,873 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 1731.1ms TimeCoverageRelationStatistics Valid=357, Invalid=1283, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 15:05:30,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-05-03 15:05:30,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 936. [2021-05-03 15:05:30,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 935 states have (on average 2.3850267379679146) internal successors, (2230), 935 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:05:30,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 2230 transitions. [2021-05-03 15:05:30,896 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 2230 transitions. Word has length 29 [2021-05-03 15:05:30,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:05:30,896 INFO L480 AbstractCegarLoop]: Abstraction has 936 states and 2230 transitions. [2021-05-03 15:05:30,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:05:30,896 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 2230 transitions. [2021-05-03 15:05:30,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:05:30,898 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:05:30,898 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:05:31,117 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:05:31,117 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:05:31,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:05:31,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1145171940, now seen corresponding path program 60 times [2021-05-03 15:05:31,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:05:31,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170035846] [2021-05-03 15:05:31,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:05:31,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:05:31,495 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:05:31,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170035846] [2021-05-03 15:05:31,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660827928] [2021-05-03 15:05:31,496 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) [2021-05-03 15:05:31,553 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 15:05:31,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:05:31,554 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:05:31,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:05:31,997 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:05:31,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-05-03 15:05:32,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:05:32,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:05:32,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:05:32,091 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:244 [2021-05-03 15:05:32,311 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 38 [2021-05-03 15:05:32,470 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 15:05:32,519 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:05:32,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:05:32,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-05-03 15:05:32,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669871681] [2021-05-03 15:05:32,520 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 15:05:32,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:05:32,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 15:05:32,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-05-03 15:05:32,521 INFO L87 Difference]: Start difference. First operand 936 states and 2230 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 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) [2021-05-03 15:05:34,016 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 35 [2021-05-03 15:05:35,183 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-05-03 15:05:35,859 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-05-03 15:05:36,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:05:36,557 INFO L93 Difference]: Finished difference Result 2169 states and 5302 transitions. [2021-05-03 15:05:36,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 15:05:36,558 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 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 [2021-05-03 15:05:36,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:05:36,562 INFO L225 Difference]: With dead ends: 2169 [2021-05-03 15:05:36,562 INFO L226 Difference]: Without dead ends: 2150 [2021-05-03 15:05:36,562 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 3248.3ms TimeCoverageRelationStatistics Valid=378, Invalid=1784, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 15:05:36,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2150 states. [2021-05-03 15:05:36,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2150 to 905. [2021-05-03 15:05:36,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 904 states have (on average 2.377212389380531) internal successors, (2149), 904 states have internal predecessors, (2149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:05:36,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 2149 transitions. [2021-05-03 15:05:36,581 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 2149 transitions. Word has length 29 [2021-05-03 15:05:36,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:05:36,581 INFO L480 AbstractCegarLoop]: Abstraction has 905 states and 2149 transitions. [2021-05-03 15:05:36,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 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) [2021-05-03 15:05:36,581 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 2149 transitions. [2021-05-03 15:05:36,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:05:36,583 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:05:36,583 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:05:36,783 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-05-03 15:05:36,783 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:05:36,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:05:36,784 INFO L82 PathProgramCache]: Analyzing trace with hash -681846126, now seen corresponding path program 61 times [2021-05-03 15:05:36,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:05:36,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274849935] [2021-05-03 15:05:36,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:05:36,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:05:37,157 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:05:37,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274849935] [2021-05-03 15:05:37,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979712750] [2021-05-03 15:05:37,158 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 [2021-05-03 15:05:37,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:05:37,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:05:37,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:05:37,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-05-03 15:05:37,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:05:37,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:05:37,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:05:37,554 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-05-03 15:05:37,607 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:05:37,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:05:37,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-05-03 15:05:37,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334328426] [2021-05-03 15:05:37,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 15:05:37,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:05:37,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 15:05:37,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:05:37,609 INFO L87 Difference]: Start difference. First operand 905 states and 2149 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:05:39,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:05:39,538 INFO L93 Difference]: Finished difference Result 2101 states and 5115 transitions. [2021-05-03 15:05:39,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 15:05:39,540 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 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 [2021-05-03 15:05:39,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:05:39,543 INFO L225 Difference]: With dead ends: 2101 [2021-05-03 15:05:39,543 INFO L226 Difference]: Without dead ends: 2092 [2021-05-03 15:05:39,544 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1260.5ms TimeCoverageRelationStatistics Valid=193, Invalid=799, Unknown=0, NotChecked=0, Total=992 [2021-05-03 15:05:39,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2092 states. [2021-05-03 15:05:39,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2092 to 902. [2021-05-03 15:05:39,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 2.3773584905660377) internal successors, (2142), 901 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:05:39,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 2142 transitions. [2021-05-03 15:05:39,561 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 2142 transitions. Word has length 29 [2021-05-03 15:05:39,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:05:39,562 INFO L480 AbstractCegarLoop]: Abstraction has 902 states and 2142 transitions. [2021-05-03 15:05:39,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:05:39,562 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 2142 transitions. [2021-05-03 15:05:39,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:05:39,563 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:05:39,563 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:05:39,764 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:05:39,764 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:05:39,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:05:39,765 INFO L82 PathProgramCache]: Analyzing trace with hash -2034498886, now seen corresponding path program 62 times [2021-05-03 15:05:39,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:05:39,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727237557] [2021-05-03 15:05:39,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:05:39,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:05:40,221 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:05:40,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727237557] [2021-05-03 15:05:40,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458680585] [2021-05-03 15:05:40,222 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 [2021-05-03 15:05:40,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:05:40,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:05:40,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:05:40,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:05:40,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:05:40,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-05-03 15:05:40,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:05:40,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:05:40,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:05:40,602 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:9 [2021-05-03 15:05:40,660 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:05:40,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:05:40,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-05-03 15:05:40,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260101715] [2021-05-03 15:05:40,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 15:05:40,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:05:40,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 15:05:40,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:05:40,662 INFO L87 Difference]: Start difference. First operand 902 states and 2142 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:05:42,130 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-05-03 15:05:43,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:05:43,626 INFO L93 Difference]: Finished difference Result 2094 states and 5113 transitions. [2021-05-03 15:05:43,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 15:05:43,627 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 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 [2021-05-03 15:05:43,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:05:43,631 INFO L225 Difference]: With dead ends: 2094 [2021-05-03 15:05:43,631 INFO L226 Difference]: Without dead ends: 2077 [2021-05-03 15:05:43,632 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1968.7ms TimeCoverageRelationStatistics Valid=271, Invalid=1211, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 15:05:43,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2077 states. [2021-05-03 15:05:43,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2077 to 923. [2021-05-03 15:05:43,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 922 states have (on average 2.3817787418655096) internal successors, (2196), 922 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:05:43,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 2196 transitions. [2021-05-03 15:05:43,650 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 2196 transitions. Word has length 29 [2021-05-03 15:05:43,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:05:43,650 INFO L480 AbstractCegarLoop]: Abstraction has 923 states and 2196 transitions. [2021-05-03 15:05:43,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:05:43,650 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 2196 transitions. [2021-05-03 15:05:43,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:05:43,651 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:05:43,651 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:05:43,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-05-03 15:05:43,852 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:05:43,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:05:43,852 INFO L82 PathProgramCache]: Analyzing trace with hash -960822572, now seen corresponding path program 63 times [2021-05-03 15:05:43,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:05:43,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758827187] [2021-05-03 15:05:43,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:05:43,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:05:44,213 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:05:44,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758827187] [2021-05-03 15:05:44,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316234681] [2021-05-03 15:05:44,213 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 [2021-05-03 15:05:44,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 15:05:44,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:05:44,235 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:05:44,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:05:44,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-05-03 15:05:44,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:05:44,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:05:44,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:05:44,569 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-05-03 15:05:44,658 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:05:44,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:05:44,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-05-03 15:05:44,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891508654] [2021-05-03 15:05:44,659 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 15:05:44,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:05:44,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 15:05:44,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-05-03 15:05:44,660 INFO L87 Difference]: Start difference. First operand 923 states and 2196 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:05:46,696 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-05-03 15:05:48,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:05:48,088 INFO L93 Difference]: Finished difference Result 2616 states and 6420 transitions. [2021-05-03 15:05:48,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-03 15:05:48,090 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 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 [2021-05-03 15:05:48,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:05:48,093 INFO L225 Difference]: With dead ends: 2616 [2021-05-03 15:05:48,093 INFO L226 Difference]: Without dead ends: 2601 [2021-05-03 15:05:48,094 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 2474.5ms TimeCoverageRelationStatistics Valid=436, Invalid=1820, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 15:05:48,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2601 states. [2021-05-03 15:05:48,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2601 to 935. [2021-05-03 15:05:48,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 935 states, 934 states have (on average 2.3822269807280514) internal successors, (2225), 934 states have internal predecessors, (2225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:05:48,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 2225 transitions. [2021-05-03 15:05:48,116 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 2225 transitions. Word has length 29 [2021-05-03 15:05:48,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:05:48,116 INFO L480 AbstractCegarLoop]: Abstraction has 935 states and 2225 transitions. [2021-05-03 15:05:48,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:05:48,116 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 2225 transitions. [2021-05-03 15:05:48,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:05:48,117 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:05:48,117 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:05:48,318 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-05-03 15:05:48,319 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:05:48,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:05:48,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1095623980, now seen corresponding path program 64 times [2021-05-03 15:05:48,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:05:48,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384969065] [2021-05-03 15:05:48,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:05:48,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:05:48,827 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:05:48,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384969065] [2021-05-03 15:05:48,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860328313] [2021-05-03 15:05:48,827 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 [2021-05-03 15:05:48,846 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:05:48,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:05:48,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:05:48,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:05:49,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-05-03 15:05:49,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:05:49,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:05:49,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:05:49,131 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-05-03 15:05:49,189 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:05:49,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:05:49,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-05-03 15:05:49,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837420704] [2021-05-03 15:05:49,190 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 15:05:49,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:05:49,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 15:05:49,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:05:49,191 INFO L87 Difference]: Start difference. First operand 935 states and 2225 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 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) [2021-05-03 15:05:51,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:05:51,414 INFO L93 Difference]: Finished difference Result 2210 states and 5419 transitions. [2021-05-03 15:05:51,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 15:05:51,415 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 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 [2021-05-03 15:05:51,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:05:51,419 INFO L225 Difference]: With dead ends: 2210 [2021-05-03 15:05:51,419 INFO L226 Difference]: Without dead ends: 2191 [2021-05-03 15:05:51,419 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1686.1ms TimeCoverageRelationStatistics Valid=232, Invalid=1028, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 15:05:51,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2191 states. [2021-05-03 15:05:51,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2191 to 914. [2021-05-03 15:05:51,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 913 states have (on average 2.380065717415115) internal successors, (2173), 913 states have internal predecessors, (2173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:05:51,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 2173 transitions. [2021-05-03 15:05:51,436 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 2173 transitions. Word has length 29 [2021-05-03 15:05:51,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:05:51,437 INFO L480 AbstractCegarLoop]: Abstraction has 914 states and 2173 transitions. [2021-05-03 15:05:51,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 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) [2021-05-03 15:05:51,437 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 2173 transitions. [2021-05-03 15:05:51,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:05:51,438 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:05:51,438 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:05:51,639 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-05-03 15:05:51,639 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:05:51,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:05:51,639 INFO L82 PathProgramCache]: Analyzing trace with hash -195203804, now seen corresponding path program 65 times [2021-05-03 15:05:51,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:05:51,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967934672] [2021-05-03 15:05:51,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:05:51,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:05:52,031 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:05:52,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967934672] [2021-05-03 15:05:52,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453367490] [2021-05-03 15:05:52,031 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 [2021-05-03 15:05:52,051 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 15:05:52,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:05:52,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:05:52,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:05:52,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-05-03 15:05:52,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:05:52,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:05:52,347 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:05:52,347 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-05-03 15:05:52,405 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:05:52,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:05:52,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-05-03 15:05:52,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746515510] [2021-05-03 15:05:52,406 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 15:05:52,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:05:52,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 15:05:52,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-05-03 15:05:52,406 INFO L87 Difference]: Start difference. First operand 914 states and 2173 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-05-03 15:05:55,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:05:55,411 INFO L93 Difference]: Finished difference Result 2713 states and 6752 transitions. [2021-05-03 15:05:55,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 15:05:55,413 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 [2021-05-03 15:05:55,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:05:55,417 INFO L225 Difference]: With dead ends: 2713 [2021-05-03 15:05:55,417 INFO L226 Difference]: Without dead ends: 2700 [2021-05-03 15:05:55,418 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 2129.3ms TimeCoverageRelationStatistics Valid=354, Invalid=1452, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 15:05:55,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2700 states. [2021-05-03 15:05:55,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2700 to 935. [2021-05-03 15:05:55,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 935 states, 934 states have (on average 2.3832976445396143) internal successors, (2226), 934 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:05:55,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 2226 transitions. [2021-05-03 15:05:55,439 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 2226 transitions. Word has length 29 [2021-05-03 15:05:55,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:05:55,439 INFO L480 AbstractCegarLoop]: Abstraction has 935 states and 2226 transitions. [2021-05-03 15:05:55,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-05-03 15:05:55,439 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 2226 transitions. [2021-05-03 15:05:55,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:05:55,440 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:05:55,441 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:05:55,641 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-05-03 15:05:55,641 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:05:55,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:05:55,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1561197246, now seen corresponding path program 66 times [2021-05-03 15:05:55,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:05:55,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889484664] [2021-05-03 15:05:55,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:05:55,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:05:56,060 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:05:56,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889484664] [2021-05-03 15:05:56,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672710035] [2021-05-03 15:05:56,060 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 [2021-05-03 15:05:56,080 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 15:05:56,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:05:56,081 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:05:56,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:05:56,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:05:56,516 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:05:56,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 31 [2021-05-03 15:05:56,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:05:56,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:05:56,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:05:56,569 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:79 [2021-05-03 15:05:56,716 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:05:56,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:05:56,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-05-03 15:05:56,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46277003] [2021-05-03 15:05:56,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 15:05:56,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:05:56,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 15:05:56,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-05-03 15:05:56,719 INFO L87 Difference]: Start difference. First operand 935 states and 2226 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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) [2021-05-03 15:05:59,624 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-05-03 15:06:00,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:06:00,205 INFO L93 Difference]: Finished difference Result 2404 states and 5965 transitions. [2021-05-03 15:06:00,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 15:06:00,206 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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 [2021-05-03 15:06:00,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:06:00,211 INFO L225 Difference]: With dead ends: 2404 [2021-05-03 15:06:00,211 INFO L226 Difference]: Without dead ends: 2392 [2021-05-03 15:06:00,211 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 2465.0ms TimeCoverageRelationStatistics Valid=325, Invalid=1481, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 15:06:00,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2392 states. [2021-05-03 15:06:00,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2392 to 948. [2021-05-03 15:06:00,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 947 states have (on average 2.3885955649419217) internal successors, (2262), 947 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:06:00,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 2262 transitions. [2021-05-03 15:06:00,232 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 2262 transitions. Word has length 29 [2021-05-03 15:06:00,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:06:00,232 INFO L480 AbstractCegarLoop]: Abstraction has 948 states and 2262 transitions. [2021-05-03 15:06:00,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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) [2021-05-03 15:06:00,232 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 2262 transitions. [2021-05-03 15:06:00,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:06:00,234 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:06:00,234 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:06:00,434 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-05-03 15:06:00,435 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:06:00,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:06:00,435 INFO L82 PathProgramCache]: Analyzing trace with hash 366523930, now seen corresponding path program 67 times [2021-05-03 15:06:00,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:06:00,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986079784] [2021-05-03 15:06:00,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:06:00,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:06:00,837 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:06:00,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986079784] [2021-05-03 15:06:00,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698957912] [2021-05-03 15:06:00,837 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 [2021-05-03 15:06:00,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:06:00,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:06:00,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:06:01,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:06:01,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-05-03 15:06:01,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:06:01,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:06:01,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:06:01,147 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-05-03 15:06:01,209 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:06:01,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:06:01,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-05-03 15:06:01,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441268914] [2021-05-03 15:06:01,209 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 15:06:01,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:06:01,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 15:06:01,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-05-03 15:06:01,210 INFO L87 Difference]: Start difference. First operand 948 states and 2262 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-05-03 15:06:03,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:06:03,460 INFO L93 Difference]: Finished difference Result 2221 states and 5461 transitions. [2021-05-03 15:06:03,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 15:06:03,461 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 [2021-05-03 15:06:03,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:06:03,465 INFO L225 Difference]: With dead ends: 2221 [2021-05-03 15:06:03,465 INFO L226 Difference]: Without dead ends: 2204 [2021-05-03 15:06:03,466 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1500.3ms TimeCoverageRelationStatistics Valid=213, Invalid=1047, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 15:06:03,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2204 states. [2021-05-03 15:06:03,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2204 to 923. [2021-05-03 15:06:03,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 922 states have (on average 2.382863340563991) internal successors, (2197), 922 states have internal predecessors, (2197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:06:03,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 2197 transitions. [2021-05-03 15:06:03,485 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 2197 transitions. Word has length 29 [2021-05-03 15:06:03,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:06:03,485 INFO L480 AbstractCegarLoop]: Abstraction has 923 states and 2197 transitions. [2021-05-03 15:06:03,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-05-03 15:06:03,485 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 2197 transitions. [2021-05-03 15:06:03,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:06:03,486 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:06:03,486 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:06:03,687 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:06:03,687 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:06:03,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:06:03,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1204815982, now seen corresponding path program 68 times [2021-05-03 15:06:03,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:06:03,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162326768] [2021-05-03 15:06:03,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:06:03,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:06:04,144 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:06:04,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162326768] [2021-05-03 15:06:04,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751908241] [2021-05-03 15:06:04,144 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) [2021-05-03 15:06:04,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:06:04,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:06:04,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:06:04,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:06:04,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-05-03 15:06:04,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:06:04,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:06:04,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:06:04,580 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-05-03 15:06:04,635 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:06:04,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:06:04,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-05-03 15:06:04,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075913963] [2021-05-03 15:06:04,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 15:06:04,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:06:04,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 15:06:04,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:06:04,637 INFO L87 Difference]: Start difference. First operand 923 states and 2197 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 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) [2021-05-03 15:06:07,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:06:07,379 INFO L93 Difference]: Finished difference Result 2192 states and 5373 transitions. [2021-05-03 15:06:07,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 15:06:07,380 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 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 [2021-05-03 15:06:07,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:06:07,384 INFO L225 Difference]: With dead ends: 2192 [2021-05-03 15:06:07,384 INFO L226 Difference]: Without dead ends: 2182 [2021-05-03 15:06:07,385 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 1803.4ms TimeCoverageRelationStatistics Valid=204, Invalid=1202, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 15:06:07,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2182 states. [2021-05-03 15:06:07,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2182 to 905. [2021-05-03 15:06:07,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 904 states have (on average 2.377212389380531) internal successors, (2149), 904 states have internal predecessors, (2149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:06:07,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 2149 transitions. [2021-05-03 15:06:07,404 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 2149 transitions. Word has length 29 [2021-05-03 15:06:07,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:06:07,404 INFO L480 AbstractCegarLoop]: Abstraction has 905 states and 2149 transitions. [2021-05-03 15:06:07,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 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) [2021-05-03 15:06:07,404 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 2149 transitions. [2021-05-03 15:06:07,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:06:07,406 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:06:07,406 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:06:07,608 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-05-03 15:06:07,608 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:06:07,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:06:07,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1872493656, now seen corresponding path program 69 times [2021-05-03 15:06:07,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:06:07,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95894184] [2021-05-03 15:06:07,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:06:07,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:06:08,032 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:06:08,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95894184] [2021-05-03 15:06:08,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665394769] [2021-05-03 15:06:08,033 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 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 [2021-05-03 15:06:08,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 15:06:08,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:06:08,054 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:06:08,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:06:08,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-05-03 15:06:08,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:06:08,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:06:08,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:06:08,471 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-05-03 15:06:08,530 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:06:08,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:06:08,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-05-03 15:06:08,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410611845] [2021-05-03 15:06:08,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 15:06:08,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:06:08,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 15:06:08,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-05-03 15:06:08,532 INFO L87 Difference]: Start difference. First operand 905 states and 2149 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:06:11,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:06:11,292 INFO L93 Difference]: Finished difference Result 2077 states and 5071 transitions. [2021-05-03 15:06:11,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 15:06:11,293 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 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 [2021-05-03 15:06:11,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:06:11,296 INFO L225 Difference]: With dead ends: 2077 [2021-05-03 15:06:11,296 INFO L226 Difference]: Without dead ends: 2060 [2021-05-03 15:06:11,296 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1847.1ms TimeCoverageRelationStatistics Valid=267, Invalid=1139, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 15:06:11,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2060 states. [2021-05-03 15:06:11,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2060 to 915. [2021-05-03 15:06:11,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 914 states have (on average 2.3785557986870898) internal successors, (2174), 914 states have internal predecessors, (2174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:06:11,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 2174 transitions. [2021-05-03 15:06:11,312 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 2174 transitions. Word has length 29 [2021-05-03 15:06:11,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:06:11,312 INFO L480 AbstractCegarLoop]: Abstraction has 915 states and 2174 transitions. [2021-05-03 15:06:11,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:06:11,312 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 2174 transitions. [2021-05-03 15:06:11,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:06:11,313 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:06:11,314 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:06:11,514 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-05-03 15:06:11,514 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:06:11,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:06:11,515 INFO L82 PathProgramCache]: Analyzing trace with hash -798817342, now seen corresponding path program 70 times [2021-05-03 15:06:11,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:06:11,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580852082] [2021-05-03 15:06:11,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:06:11,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:06:11,907 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:06:11,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580852082] [2021-05-03 15:06:11,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800649204] [2021-05-03 15:06:11,907 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 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 [2021-05-03 15:06:11,925 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:06:11,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:06:11,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:06:11,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:06:12,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:06:12,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-05-03 15:06:12,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:06:12,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:06:12,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:06:12,265 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-05-03 15:06:12,369 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:06:12,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:06:12,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-05-03 15:06:12,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793501061] [2021-05-03 15:06:12,370 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 15:06:12,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:06:12,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 15:06:12,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:06:12,370 INFO L87 Difference]: Start difference. First operand 915 states and 2174 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:06:14,438 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-05-03 15:06:15,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:06:15,323 INFO L93 Difference]: Finished difference Result 2689 states and 6592 transitions. [2021-05-03 15:06:15,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 15:06:15,324 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 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 [2021-05-03 15:06:15,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:06:15,329 INFO L225 Difference]: With dead ends: 2689 [2021-05-03 15:06:15,329 INFO L226 Difference]: Without dead ends: 2676 [2021-05-03 15:06:15,330 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 2162.5ms TimeCoverageRelationStatistics Valid=379, Invalid=1427, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 15:06:15,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2676 states. [2021-05-03 15:06:15,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2676 to 939. [2021-05-03 15:06:15,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 938 states have (on average 2.384861407249467) internal successors, (2237), 938 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:06:15,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 2237 transitions. [2021-05-03 15:06:15,350 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 2237 transitions. Word has length 29 [2021-05-03 15:06:15,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:06:15,350 INFO L480 AbstractCegarLoop]: Abstraction has 939 states and 2237 transitions. [2021-05-03 15:06:15,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:06:15,351 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 2237 transitions. [2021-05-03 15:06:15,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:06:15,352 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:06:15,352 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:06:15,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-05-03 15:06:15,553 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:06:15,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:06:15,553 INFO L82 PathProgramCache]: Analyzing trace with hash -933618750, now seen corresponding path program 71 times [2021-05-03 15:06:15,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:06:15,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016456405] [2021-05-03 15:06:15,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:06:15,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:06:15,963 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:06:15,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016456405] [2021-05-03 15:06:15,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457918714] [2021-05-03 15:06:15,963 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 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 [2021-05-03 15:06:15,983 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 15:06:15,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:06:15,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:06:15,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:06:16,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:06:16,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-05-03 15:06:16,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:06:16,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:06:16,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:06:16,294 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-05-03 15:06:16,355 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:06:16,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:06:16,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-05-03 15:06:16,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620230987] [2021-05-03 15:06:16,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 15:06:16,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:06:16,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 15:06:16,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:06:16,357 INFO L87 Difference]: Start difference. First operand 939 states and 2237 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 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) [2021-05-03 15:06:18,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:06:18,189 INFO L93 Difference]: Finished difference Result 2287 states and 5614 transitions. [2021-05-03 15:06:18,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 15:06:18,190 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 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 [2021-05-03 15:06:18,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:06:18,194 INFO L225 Difference]: With dead ends: 2287 [2021-05-03 15:06:18,194 INFO L226 Difference]: Without dead ends: 2269 [2021-05-03 15:06:18,194 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 1577.2ms TimeCoverageRelationStatistics Valid=220, Invalid=970, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 15:06:18,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2269 states. [2021-05-03 15:06:18,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2269 to 914. [2021-05-03 15:06:18,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 913 states have (on average 2.380065717415115) internal successors, (2173), 913 states have internal predecessors, (2173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:06:18,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 2173 transitions. [2021-05-03 15:06:18,213 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 2173 transitions. Word has length 29 [2021-05-03 15:06:18,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:06:18,213 INFO L480 AbstractCegarLoop]: Abstraction has 914 states and 2173 transitions. [2021-05-03 15:06:18,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 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) [2021-05-03 15:06:18,214 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 2173 transitions. [2021-05-03 15:06:18,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:06:18,217 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:06:18,217 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:06:18,418 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-05-03 15:06:18,418 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:06:18,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:06:18,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1639155038, now seen corresponding path program 72 times [2021-05-03 15:06:18,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:06:18,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989704076] [2021-05-03 15:06:18,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:06:18,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:06:18,715 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:06:18,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989704076] [2021-05-03 15:06:18,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316476690] [2021-05-03 15:06:18,716 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 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 [2021-05-03 15:06:18,738 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 15:06:18,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:06:18,739 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:06:18,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:06:19,154 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:06:19,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-05-03 15:06:19,164 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:06:19,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:06:19,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:06:19,193 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:38 [2021-05-03 15:06:19,415 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:06:19,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:06:19,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-05-03 15:06:19,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953071484] [2021-05-03 15:06:19,416 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 15:06:19,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:06:19,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 15:06:19,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-05-03 15:06:19,417 INFO L87 Difference]: Start difference. First operand 914 states and 2173 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:06:20,179 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2021-05-03 15:06:21,191 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2021-05-03 15:06:22,041 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-05-03 15:06:22,426 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-05-03 15:06:23,015 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-05-03 15:06:23,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:06:23,294 INFO L93 Difference]: Finished difference Result 2380 states and 5786 transitions. [2021-05-03 15:06:23,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 15:06:23,296 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 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 [2021-05-03 15:06:23,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:06:23,300 INFO L225 Difference]: With dead ends: 2380 [2021-05-03 15:06:23,300 INFO L226 Difference]: Without dead ends: 2371 [2021-05-03 15:06:23,300 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 2794.1ms TimeCoverageRelationStatistics Valid=399, Invalid=1493, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 15:06:23,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2371 states. [2021-05-03 15:06:23,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2371 to 919. [2021-05-03 15:06:23,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 2.3801742919389977) internal successors, (2185), 918 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:06:23,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 2185 transitions. [2021-05-03 15:06:23,318 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 2185 transitions. Word has length 29 [2021-05-03 15:06:23,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:06:23,318 INFO L480 AbstractCegarLoop]: Abstraction has 919 states and 2185 transitions. [2021-05-03 15:06:23,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:06:23,319 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 2185 transitions. [2021-05-03 15:06:23,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:06:23,320 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:06:23,320 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:06:23,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-05-03 15:06:23,521 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:06:23,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:06:23,521 INFO L82 PathProgramCache]: Analyzing trace with hash 2110585336, now seen corresponding path program 73 times [2021-05-03 15:06:23,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:06:23,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013724717] [2021-05-03 15:06:23,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:06:23,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:06:23,909 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:06:23,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013724717] [2021-05-03 15:06:23,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143739808] [2021-05-03 15:06:23,909 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 [2021-05-03 15:06:23,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:06:23,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:06:23,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:06:24,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-05-03 15:06:24,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:06:24,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:06:24,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:06:24,286 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-05-03 15:06:24,342 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:06:24,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:06:24,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-05-03 15:06:24,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794529158] [2021-05-03 15:06:24,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 15:06:24,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:06:24,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 15:06:24,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:06:24,343 INFO L87 Difference]: Start difference. First operand 919 states and 2185 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:06:26,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:06:26,299 INFO L93 Difference]: Finished difference Result 2147 states and 5229 transitions. [2021-05-03 15:06:26,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 15:06:26,301 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 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 [2021-05-03 15:06:26,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:06:26,305 INFO L225 Difference]: With dead ends: 2147 [2021-05-03 15:06:26,305 INFO L226 Difference]: Without dead ends: 2138 [2021-05-03 15:06:26,305 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1337.1ms TimeCoverageRelationStatistics Valid=197, Invalid=859, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 15:06:26,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2138 states. [2021-05-03 15:06:26,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2138 to 914. [2021-05-03 15:06:26,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 913 states have (on average 2.380065717415115) internal successors, (2173), 913 states have internal predecessors, (2173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:06:26,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 2173 transitions. [2021-05-03 15:06:26,323 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 2173 transitions. Word has length 29 [2021-05-03 15:06:26,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:06:26,323 INFO L480 AbstractCegarLoop]: Abstraction has 914 states and 2173 transitions. [2021-05-03 15:06:26,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:06:26,323 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 2173 transitions. [2021-05-03 15:06:26,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:06:26,325 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:06:26,325 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:06:26,525 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:06:26,525 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:06:26,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:06:26,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1607286566, now seen corresponding path program 74 times [2021-05-03 15:06:26,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:06:26,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968678037] [2021-05-03 15:06:26,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:06:26,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:06:26,968 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:06:26,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968678037] [2021-05-03 15:06:26,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131488743] [2021-05-03 15:06:26,969 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 [2021-05-03 15:06:26,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:06:26,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:06:26,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:06:26,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:06:27,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:06:27,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-05-03 15:06:27,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:06:27,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:06:27,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:06:27,392 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:9 [2021-05-03 15:06:27,460 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:06:27,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:06:27,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-05-03 15:06:27,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734887338] [2021-05-03 15:06:27,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 15:06:27,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:06:27,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 15:06:27,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:06:27,462 INFO L87 Difference]: Start difference. First operand 914 states and 2173 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:06:30,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:06:30,493 INFO L93 Difference]: Finished difference Result 2251 states and 5462 transitions. [2021-05-03 15:06:30,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 15:06:30,494 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 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 [2021-05-03 15:06:30,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:06:30,499 INFO L225 Difference]: With dead ends: 2251 [2021-05-03 15:06:30,499 INFO L226 Difference]: Without dead ends: 2242 [2021-05-03 15:06:30,499 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 2023.2ms TimeCoverageRelationStatistics Valid=269, Invalid=1137, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 15:06:30,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2021-05-03 15:06:30,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 902. [2021-05-03 15:06:30,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 2.3773584905660377) internal successors, (2142), 901 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:06:30,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 2142 transitions. [2021-05-03 15:06:30,523 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 2142 transitions. Word has length 29 [2021-05-03 15:06:30,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:06:30,523 INFO L480 AbstractCegarLoop]: Abstraction has 902 states and 2142 transitions. [2021-05-03 15:06:30,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:06:30,523 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 2142 transitions. [2021-05-03 15:06:30,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:06:30,525 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:06:30,525 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:06:30,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-05-03 15:06:30,726 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:06:30,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:06:30,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1416027862, now seen corresponding path program 75 times [2021-05-03 15:06:30,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:06:30,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216841490] [2021-05-03 15:06:30,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:06:30,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:06:31,200 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:06:31,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216841490] [2021-05-03 15:06:31,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506138721] [2021-05-03 15:06:31,201 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 [2021-05-03 15:06:31,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 15:06:31,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:06:31,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:06:31,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:06:31,646 INFO L354 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2021-05-03 15:06:31,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 62 [2021-05-03 15:06:31,651 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:06:31,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:06:31,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:06:31,661 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:90, output treesize:19 [2021-05-03 15:06:31,722 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:06:31,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:06:31,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-05-03 15:06:31,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620117284] [2021-05-03 15:06:31,723 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 15:06:31,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:06:31,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 15:06:31,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:06:31,724 INFO L87 Difference]: Start difference. First operand 902 states and 2142 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 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) [2021-05-03 15:06:34,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:06:34,344 INFO L93 Difference]: Finished difference Result 2270 states and 5585 transitions. [2021-05-03 15:06:34,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 15:06:34,346 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 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 [2021-05-03 15:06:34,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:06:34,350 INFO L225 Difference]: With dead ends: 2270 [2021-05-03 15:06:34,350 INFO L226 Difference]: Without dead ends: 2261 [2021-05-03 15:06:34,351 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1597.0ms TimeCoverageRelationStatistics Valid=180, Invalid=876, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 15:06:34,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2261 states. [2021-05-03 15:06:34,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2261 to 923. [2021-05-03 15:06:34,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 922 states have (on average 2.382863340563991) internal successors, (2197), 922 states have internal predecessors, (2197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:06:34,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 2197 transitions. [2021-05-03 15:06:34,373 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 2197 transitions. Word has length 29 [2021-05-03 15:06:34,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:06:34,373 INFO L480 AbstractCegarLoop]: Abstraction has 923 states and 2197 transitions. [2021-05-03 15:06:34,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 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) [2021-05-03 15:06:34,373 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 2197 transitions. [2021-05-03 15:06:34,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:06:34,375 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:06:34,375 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:06:34,580 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-05-03 15:06:34,581 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:06:34,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:06:34,581 INFO L82 PathProgramCache]: Analyzing trace with hash -342351548, now seen corresponding path program 76 times [2021-05-03 15:06:34,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:06:34,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323301998] [2021-05-03 15:06:34,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:06:34,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:06:35,082 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:06:35,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323301998] [2021-05-03 15:06:35,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039510997] [2021-05-03 15:06:35,083 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 [2021-05-03 15:06:35,103 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:06:35,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:06:35,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:06:35,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:06:35,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:06:35,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-05-03 15:06:35,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:06:35,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:06:35,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:06:35,417 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-05-03 15:06:35,484 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:06:35,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:06:35,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-05-03 15:06:35,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044860104] [2021-05-03 15:06:35,484 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 15:06:35,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:06:35,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 15:06:35,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-05-03 15:06:35,485 INFO L87 Difference]: Start difference. First operand 923 states and 2197 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-05-03 15:06:36,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:06:36,938 INFO L93 Difference]: Finished difference Result 2303 states and 5689 transitions. [2021-05-03 15:06:36,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 15:06:36,940 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 [2021-05-03 15:06:36,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:06:36,944 INFO L225 Difference]: With dead ends: 2303 [2021-05-03 15:06:36,944 INFO L226 Difference]: Without dead ends: 2292 [2021-05-03 15:06:36,944 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 1360.3ms TimeCoverageRelationStatistics Valid=190, Invalid=740, Unknown=0, NotChecked=0, Total=930 [2021-05-03 15:06:36,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2292 states. [2021-05-03 15:06:36,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2292 to 935. [2021-05-03 15:06:36,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 935 states, 934 states have (on average 2.3843683083511777) internal successors, (2227), 934 states have internal predecessors, (2227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:06:36,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 2227 transitions. [2021-05-03 15:06:36,964 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 2227 transitions. Word has length 29 [2021-05-03 15:06:36,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:06:36,964 INFO L480 AbstractCegarLoop]: Abstraction has 935 states and 2227 transitions. [2021-05-03 15:06:36,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-05-03 15:06:36,965 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 2227 transitions. [2021-05-03 15:06:36,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:06:36,966 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:06:36,966 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:06:37,180 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-05-03 15:06:37,181 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:06:37,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:06:37,181 INFO L82 PathProgramCache]: Analyzing trace with hash -477152956, now seen corresponding path program 77 times [2021-05-03 15:06:37,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:06:37,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745121015] [2021-05-03 15:06:37,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:06:37,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:06:37,631 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:06:37,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745121015] [2021-05-03 15:06:37,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970641003] [2021-05-03 15:06:37,631 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 [2021-05-03 15:06:37,652 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 15:06:37,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:06:37,653 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:06:37,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:06:38,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:06:38,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:06:38,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:06:38,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:06:38,234 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 21 treesize of output 11 [2021-05-03 15:06:38,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:06:38,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:06:38,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:06:38,253 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:10 [2021-05-03 15:06:38,316 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:06:38,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:06:38,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-05-03 15:06:38,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259248261] [2021-05-03 15:06:38,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 15:06:38,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:06:38,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 15:06:38,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-05-03 15:06:38,317 INFO L87 Difference]: Start difference. First operand 935 states and 2227 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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) [2021-05-03 15:06:41,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:06:41,150 INFO L93 Difference]: Finished difference Result 2242 states and 5540 transitions. [2021-05-03 15:06:41,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 15:06:41,152 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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 [2021-05-03 15:06:41,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:06:41,156 INFO L225 Difference]: With dead ends: 2242 [2021-05-03 15:06:41,156 INFO L226 Difference]: Without dead ends: 2231 [2021-05-03 15:06:41,157 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 2091.3ms TimeCoverageRelationStatistics Valid=216, Invalid=1190, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 15:06:41,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2231 states. [2021-05-03 15:06:41,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2231 to 945. [2021-05-03 15:06:41,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 944 states have (on average 2.389830508474576) internal successors, (2256), 944 states have internal predecessors, (2256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:06:41,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 2256 transitions. [2021-05-03 15:06:41,187 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 2256 transitions. Word has length 29 [2021-05-03 15:06:41,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:06:41,187 INFO L480 AbstractCegarLoop]: Abstraction has 945 states and 2256 transitions. [2021-05-03 15:06:41,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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) [2021-05-03 15:06:41,187 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 2256 transitions. [2021-05-03 15:06:41,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:06:41,188 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:06:41,189 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:06:41,392 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-05-03 15:06:41,393 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:06:41,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:06:41,393 INFO L82 PathProgramCache]: Analyzing trace with hash 865294968, now seen corresponding path program 78 times [2021-05-03 15:06:41,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:06:41,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611316316] [2021-05-03 15:06:41,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:06:41,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:06:41,846 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:06:41,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611316316] [2021-05-03 15:06:41,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331055560] [2021-05-03 15:06:41,846 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 [2021-05-03 15:06:41,867 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 15:06:41,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:06:41,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:06:41,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:06:42,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:06:42,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-05-03 15:06:42,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:06:42,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:06:42,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:06:42,162 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-05-03 15:06:42,231 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:06:42,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:06:42,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-05-03 15:06:42,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619790337] [2021-05-03 15:06:42,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 15:06:42,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:06:42,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 15:06:42,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-05-03 15:06:42,233 INFO L87 Difference]: Start difference. First operand 945 states and 2256 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 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) [2021-05-03 15:06:44,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:06:44,779 INFO L93 Difference]: Finished difference Result 2742 states and 6812 transitions. [2021-05-03 15:06:44,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 15:06:44,780 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 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 [2021-05-03 15:06:44,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:06:44,785 INFO L225 Difference]: With dead ends: 2742 [2021-05-03 15:06:44,785 INFO L226 Difference]: Without dead ends: 2722 [2021-05-03 15:06:44,785 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 1986.9ms TimeCoverageRelationStatistics Valid=290, Invalid=1116, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 15:06:44,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2722 states. [2021-05-03 15:06:44,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2722 to 914. [2021-05-03 15:06:44,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 913 states have (on average 2.380065717415115) internal successors, (2173), 913 states have internal predecessors, (2173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:06:44,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 2173 transitions. [2021-05-03 15:06:44,807 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 2173 transitions. Word has length 29 [2021-05-03 15:06:44,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:06:44,807 INFO L480 AbstractCegarLoop]: Abstraction has 914 states and 2173 transitions. [2021-05-03 15:06:44,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 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) [2021-05-03 15:06:44,808 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 2173 transitions. [2021-05-03 15:06:44,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:06:44,809 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:06:44,809 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:06:45,010 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:06:45,011 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:06:45,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:06:45,011 INFO L82 PathProgramCache]: Analyzing trace with hash 216748502, now seen corresponding path program 79 times [2021-05-03 15:06:45,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:06:45,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272692841] [2021-05-03 15:06:45,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:06:45,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:06:45,546 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:06:45,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272692841] [2021-05-03 15:06:45,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033100581] [2021-05-03 15:06:45,546 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 [2021-05-03 15:06:45,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:06:45,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:06:45,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:06:45,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:06:45,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-05-03 15:06:45,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:06:45,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:06:45,955 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:06:45,956 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-05-03 15:06:46,043 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:06:46,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:06:46,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-05-03 15:06:46,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028829190] [2021-05-03 15:06:46,044 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 15:06:46,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:06:46,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 15:06:46,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:06:46,045 INFO L87 Difference]: Start difference. First operand 914 states and 2173 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 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) [2021-05-03 15:06:46,484 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-05-03 15:06:47,769 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-05-03 15:06:48,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:06:48,854 INFO L93 Difference]: Finished difference Result 2294 states and 5646 transitions. [2021-05-03 15:06:48,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 15:06:48,856 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 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 [2021-05-03 15:06:48,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:06:48,860 INFO L225 Difference]: With dead ends: 2294 [2021-05-03 15:06:48,860 INFO L226 Difference]: Without dead ends: 2283 [2021-05-03 15:06:48,860 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 2343.9ms TimeCoverageRelationStatistics Valid=301, Invalid=1259, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 15:06:48,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2283 states. [2021-05-03 15:06:48,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2283 to 935. [2021-05-03 15:06:48,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 935 states, 934 states have (on average 2.3843683083511777) internal successors, (2227), 934 states have internal predecessors, (2227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:06:48,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 2227 transitions. [2021-05-03 15:06:48,880 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 2227 transitions. Word has length 29 [2021-05-03 15:06:48,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:06:48,880 INFO L480 AbstractCegarLoop]: Abstraction has 935 states and 2227 transitions. [2021-05-03 15:06:48,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 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) [2021-05-03 15:06:48,881 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 2227 transitions. [2021-05-03 15:06:48,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:06:48,882 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:06:48,882 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:06:49,082 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:06:49,083 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:06:49,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:06:49,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1973149552, now seen corresponding path program 80 times [2021-05-03 15:06:49,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:06:49,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56150360] [2021-05-03 15:06:49,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:06:49,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:06:49,668 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:06:49,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56150360] [2021-05-03 15:06:49,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333586793] [2021-05-03 15:06:49,668 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 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 [2021-05-03 15:06:49,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:06:49,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:06:49,701 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 15:06:49,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:06:50,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:06:50,173 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:06:50,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-05-03 15:06:50,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:06:50,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:06:50,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:06:50,230 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:90 [2021-05-03 15:06:50,550 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-05-03 15:06:50,653 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:06:50,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:06:50,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-05-03 15:06:50,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674590928] [2021-05-03 15:06:50,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 15:06:50,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:06:50,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 15:06:50,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2021-05-03 15:06:50,654 INFO L87 Difference]: Start difference. First operand 935 states and 2227 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 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) [2021-05-03 15:06:51,163 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-05-03 15:06:51,441 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2021-05-03 15:06:52,860 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2021-05-03 15:06:53,222 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-05-03 15:06:53,894 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-05-03 15:06:54,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:06:54,329 INFO L93 Difference]: Finished difference Result 2334 states and 5752 transitions. [2021-05-03 15:06:54,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 15:06:54,329 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 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 [2021-05-03 15:06:54,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:06:54,333 INFO L225 Difference]: With dead ends: 2334 [2021-05-03 15:06:54,333 INFO L226 Difference]: Without dead ends: 2322 [2021-05-03 15:06:54,333 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 3127.5ms TimeCoverageRelationStatistics Valid=311, Invalid=1411, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 15:06:54,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2322 states. [2021-05-03 15:06:54,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2322 to 958. [2021-05-03 15:06:54,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 957 states have (on average 2.3908045977011496) internal successors, (2288), 957 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:06:54,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 2288 transitions. [2021-05-03 15:06:54,346 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 2288 transitions. Word has length 29 [2021-05-03 15:06:54,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:06:54,346 INFO L480 AbstractCegarLoop]: Abstraction has 958 states and 2288 transitions. [2021-05-03 15:06:54,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 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) [2021-05-03 15:06:54,346 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 2288 transitions. [2021-05-03 15:06:54,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:06:54,347 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:06:54,347 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:06:54,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-05-03 15:06:54,549 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:06:54,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:06:54,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1055199362, now seen corresponding path program 81 times [2021-05-03 15:06:54,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:06:54,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550432470] [2021-05-03 15:06:54,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:06:54,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:06:55,148 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:06:55,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550432470] [2021-05-03 15:06:55,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581922652] [2021-05-03 15:06:55,149 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 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 [2021-05-03 15:06:55,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 15:06:55,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:06:55,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:06:55,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:06:55,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-05-03 15:06:55,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:06:55,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:06:55,568 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:06:55,568 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-05-03 15:06:55,686 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:06:55,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:06:55,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-05-03 15:06:55,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018533986] [2021-05-03 15:06:55,687 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 15:06:55,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:06:55,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 15:06:55,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:06:55,688 INFO L87 Difference]: Start difference. First operand 958 states and 2288 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 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) [2021-05-03 15:06:56,254 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-05-03 15:06:56,542 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2021-05-03 15:06:56,982 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-05-03 15:06:58,923 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-05-03 15:06:59,296 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-05-03 15:06:59,541 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-05-03 15:06:59,909 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-05-03 15:07:00,108 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-05-03 15:07:00,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:07:00,750 INFO L93 Difference]: Finished difference Result 2645 states and 6489 transitions. [2021-05-03 15:07:00,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-03 15:07:00,751 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 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 [2021-05-03 15:07:00,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:07:00,755 INFO L225 Difference]: With dead ends: 2645 [2021-05-03 15:07:00,755 INFO L226 Difference]: Without dead ends: 2618 [2021-05-03 15:07:00,755 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 4001.0ms TimeCoverageRelationStatistics Valid=500, Invalid=2152, Unknown=0, NotChecked=0, Total=2652 [2021-05-03 15:07:00,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2618 states. [2021-05-03 15:07:00,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2618 to 923. [2021-05-03 15:07:00,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 922 states have (on average 2.3817787418655096) internal successors, (2196), 922 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:07:00,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 2196 transitions. [2021-05-03 15:07:00,769 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 2196 transitions. Word has length 29 [2021-05-03 15:07:00,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:07:00,769 INFO L480 AbstractCegarLoop]: Abstraction has 923 states and 2196 transitions. [2021-05-03 15:07:00,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 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) [2021-05-03 15:07:00,769 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 2196 transitions. [2021-05-03 15:07:00,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:07:00,770 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:07:00,770 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:07:00,971 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:07:00,971 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:07:00,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:07:00,971 INFO L82 PathProgramCache]: Analyzing trace with hash -792863676, now seen corresponding path program 82 times [2021-05-03 15:07:00,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:07:00,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84359421] [2021-05-03 15:07:00,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:07:00,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:07:01,571 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:07:01,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84359421] [2021-05-03 15:07:01,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169344558] [2021-05-03 15:07:01,572 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 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 [2021-05-03 15:07:01,592 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:07:01,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:07:01,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:07:01,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:07:02,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-05-03 15:07:02,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:07:02,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:07:02,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:07:02,052 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-05-03 15:07:02,125 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:07:02,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:07:02,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-05-03 15:07:02,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123544395] [2021-05-03 15:07:02,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 15:07:02,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:07:02,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 15:07:02,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:07:02,127 INFO L87 Difference]: Start difference. First operand 923 states and 2196 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 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) [2021-05-03 15:07:04,560 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-05-03 15:07:05,014 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-05-03 15:07:05,193 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2021-05-03 15:07:06,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:07:06,713 INFO L93 Difference]: Finished difference Result 2095 states and 5104 transitions. [2021-05-03 15:07:06,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 15:07:06,715 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 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 [2021-05-03 15:07:06,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:07:06,719 INFO L225 Difference]: With dead ends: 2095 [2021-05-03 15:07:06,719 INFO L226 Difference]: Without dead ends: 2072 [2021-05-03 15:07:06,719 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 3013.3ms TimeCoverageRelationStatistics Valid=273, Invalid=1533, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 15:07:06,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2021-05-03 15:07:06,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 905. [2021-05-03 15:07:06,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 904 states have (on average 2.377212389380531) internal successors, (2149), 904 states have internal predecessors, (2149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:07:06,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 2149 transitions. [2021-05-03 15:07:06,737 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 2149 transitions. Word has length 29 [2021-05-03 15:07:06,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:07:06,738 INFO L480 AbstractCegarLoop]: Abstraction has 905 states and 2149 transitions. [2021-05-03 15:07:06,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 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) [2021-05-03 15:07:06,738 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 2149 transitions. [2021-05-03 15:07:06,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:07:06,739 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:07:06,739 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:07:06,940 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-05-03 15:07:06,940 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:07:06,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:07:06,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1290856278, now seen corresponding path program 83 times [2021-05-03 15:07:06,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:07:06,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121922724] [2021-05-03 15:07:06,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:07:06,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:07:07,521 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:07:07,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121922724] [2021-05-03 15:07:07,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943787992] [2021-05-03 15:07:07,522 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 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 [2021-05-03 15:07:07,544 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 15:07:07,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:07:07,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:07:07,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:07:07,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-05-03 15:07:07,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:07:07,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:07:07,939 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:07:07,939 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-05-03 15:07:08,021 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:07:08,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:07:08,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-05-03 15:07:08,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536056258] [2021-05-03 15:07:08,021 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 15:07:08,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:07:08,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 15:07:08,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:07:08,022 INFO L87 Difference]: Start difference. First operand 905 states and 2149 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 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) [2021-05-03 15:07:10,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:07:10,632 INFO L93 Difference]: Finished difference Result 2445 states and 6022 transitions. [2021-05-03 15:07:10,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 15:07:10,633 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 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 [2021-05-03 15:07:10,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:07:10,637 INFO L225 Difference]: With dead ends: 2445 [2021-05-03 15:07:10,638 INFO L226 Difference]: Without dead ends: 2434 [2021-05-03 15:07:10,638 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 1992.6ms TimeCoverageRelationStatistics Valid=245, Invalid=945, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 15:07:10,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2434 states. [2021-05-03 15:07:10,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2434 to 939. [2021-05-03 15:07:10,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 938 states have (on average 2.386993603411514) internal successors, (2239), 938 states have internal predecessors, (2239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:07:10,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 2239 transitions. [2021-05-03 15:07:10,659 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 2239 transitions. Word has length 29 [2021-05-03 15:07:10,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:07:10,659 INFO L480 AbstractCegarLoop]: Abstraction has 939 states and 2239 transitions. [2021-05-03 15:07:10,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 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) [2021-05-03 15:07:10,659 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 2239 transitions. [2021-05-03 15:07:10,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:07:10,660 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:07:10,660 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:07:10,861 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:07:10,861 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:07:10,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:07:10,861 INFO L82 PathProgramCache]: Analyzing trace with hash 465544772, now seen corresponding path program 84 times [2021-05-03 15:07:10,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:07:10,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381115901] [2021-05-03 15:07:10,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:07:10,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:07:11,355 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:07:11,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381115901] [2021-05-03 15:07:11,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960004705] [2021-05-03 15:07:11,356 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 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 [2021-05-03 15:07:11,375 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 15:07:11,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:07:11,376 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:07:11,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:07:11,939 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:07:11,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 35 [2021-05-03 15:07:11,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:07:12,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:07:12,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:07:12,050 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:180 [2021-05-03 15:07:12,442 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-05-03 15:07:12,794 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-05-03 15:07:12,895 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:07:12,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:07:12,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-05-03 15:07:12,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548451695] [2021-05-03 15:07:12,896 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 15:07:12,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:07:12,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 15:07:12,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-05-03 15:07:12,897 INFO L87 Difference]: Start difference. First operand 939 states and 2239 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 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) [2021-05-03 15:07:13,479 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 34 [2021-05-03 15:07:15,739 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-05-03 15:07:17,141 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 42 [2021-05-03 15:07:18,438 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 27 [2021-05-03 15:07:18,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:07:18,588 INFO L93 Difference]: Finished difference Result 2351 states and 5788 transitions. [2021-05-03 15:07:18,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-03 15:07:18,590 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 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 [2021-05-03 15:07:18,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:07:18,594 INFO L225 Difference]: With dead ends: 2351 [2021-05-03 15:07:18,594 INFO L226 Difference]: Without dead ends: 2338 [2021-05-03 15:07:18,595 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 708 ImplicationChecksByTransitivity, 4465.4ms TimeCoverageRelationStatistics Valid=404, Invalid=2248, Unknown=0, NotChecked=0, Total=2652 [2021-05-03 15:07:18,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2338 states. [2021-05-03 15:07:18,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2338 to 947. [2021-05-03 15:07:18,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 946 states have (on average 2.383720930232558) internal successors, (2255), 946 states have internal predecessors, (2255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:07:18,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 2255 transitions. [2021-05-03 15:07:18,613 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 2255 transitions. Word has length 29 [2021-05-03 15:07:18,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:07:18,613 INFO L480 AbstractCegarLoop]: Abstraction has 947 states and 2255 transitions. [2021-05-03 15:07:18,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 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) [2021-05-03 15:07:18,613 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 2255 transitions. [2021-05-03 15:07:18,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:07:18,615 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:07:18,615 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:07:18,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:07:18,817 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:07:18,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:07:18,817 INFO L82 PathProgramCache]: Analyzing trace with hash -452405418, now seen corresponding path program 85 times [2021-05-03 15:07:18,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:07:18,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124119472] [2021-05-03 15:07:18,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:07:18,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:07:19,401 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:07:19,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124119472] [2021-05-03 15:07:19,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482775417] [2021-05-03 15:07:19,402 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 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 [2021-05-03 15:07:19,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:07:19,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:07:19,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:07:19,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-05-03 15:07:19,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:07:19,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:07:19,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:07:19,874 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-05-03 15:07:20,001 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:07:20,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:07:20,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-05-03 15:07:20,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788292232] [2021-05-03 15:07:20,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 15:07:20,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:07:20,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 15:07:20,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:07:20,003 INFO L87 Difference]: Start difference. First operand 947 states and 2255 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 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) [2021-05-03 15:07:20,402 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2021-05-03 15:07:23,096 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-05-03 15:07:23,331 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-05-03 15:07:23,644 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-05-03 15:07:23,950 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-05-03 15:07:24,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:07:24,234 INFO L93 Difference]: Finished difference Result 2777 states and 6800 transitions. [2021-05-03 15:07:24,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-03 15:07:24,236 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 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 [2021-05-03 15:07:24,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:07:24,241 INFO L225 Difference]: With dead ends: 2777 [2021-05-03 15:07:24,241 INFO L226 Difference]: Without dead ends: 2759 [2021-05-03 15:07:24,241 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 3438.4ms TimeCoverageRelationStatistics Valid=431, Invalid=1731, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 15:07:24,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2759 states. [2021-05-03 15:07:24,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2759 to 935. [2021-05-03 15:07:24,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 935 states, 934 states have (on average 2.380085653104925) internal successors, (2223), 934 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:07:24,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 2223 transitions. [2021-05-03 15:07:24,263 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 2223 transitions. Word has length 29 [2021-05-03 15:07:24,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:07:24,263 INFO L480 AbstractCegarLoop]: Abstraction has 935 states and 2223 transitions. [2021-05-03 15:07:24,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 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) [2021-05-03 15:07:24,264 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 2223 transitions. [2021-05-03 15:07:24,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:07:24,265 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:07:24,265 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:07:24,466 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:07:24,467 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:07:24,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:07:24,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1105795140, now seen corresponding path program 86 times [2021-05-03 15:07:24,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:07:24,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830406560] [2021-05-03 15:07:24,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:07:24,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:07:25,073 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:07:25,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830406560] [2021-05-03 15:07:25,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281130360] [2021-05-03 15:07:25,073 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 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 [2021-05-03 15:07:25,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:07:25,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:07:25,093 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 15:07:25,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:07:25,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:07:25,875 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:07:25,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-05-03 15:07:25,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:07:25,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:07:25,932 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:07:25,932 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:53 [2021-05-03 15:07:26,272 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:07:26,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:07:26,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-05-03 15:07:26,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653962491] [2021-05-03 15:07:26,273 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 15:07:26,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:07:26,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 15:07:26,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-05-03 15:07:26,274 INFO L87 Difference]: Start difference. First operand 935 states and 2223 transitions. Second operand has 25 states, 25 states have (on average 2.04) 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) [2021-05-03 15:07:28,684 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2021-05-03 15:07:29,388 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2021-05-03 15:07:29,806 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-05-03 15:07:30,597 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2021-05-03 15:07:30,953 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2021-05-03 15:07:31,301 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2021-05-03 15:07:31,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:07:31,866 INFO L93 Difference]: Finished difference Result 2321 states and 5636 transitions. [2021-05-03 15:07:31,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 15:07:31,868 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) 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 [2021-05-03 15:07:31,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:07:31,872 INFO L225 Difference]: With dead ends: 2321 [2021-05-03 15:07:31,872 INFO L226 Difference]: Without dead ends: 2301 [2021-05-03 15:07:31,872 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 3602.1ms TimeCoverageRelationStatistics Valid=283, Invalid=1439, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 15:07:31,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2021-05-03 15:07:31,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 920. [2021-05-03 15:07:31,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 919 states have (on average 2.3754080522306857) internal successors, (2183), 919 states have internal predecessors, (2183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:07:31,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 2183 transitions. [2021-05-03 15:07:31,899 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 2183 transitions. Word has length 29 [2021-05-03 15:07:31,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:07:31,900 INFO L480 AbstractCegarLoop]: Abstraction has 920 states and 2183 transitions. [2021-05-03 15:07:31,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) 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) [2021-05-03 15:07:31,900 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 2183 transitions. [2021-05-03 15:07:31,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:07:31,901 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:07:31,901 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:07:32,117 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:07:32,118 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:07:32,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:07:32,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1875927132, now seen corresponding path program 87 times [2021-05-03 15:07:32,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:07:32,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736339624] [2021-05-03 15:07:32,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:07:32,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:07:32,687 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:07:32,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736339624] [2021-05-03 15:07:32,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546900554] [2021-05-03 15:07:32,688 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 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 [2021-05-03 15:07:32,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 15:07:32,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:07:32,708 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:07:32,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:07:33,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-05-03 15:07:33,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:07:33,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:07:33,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:07:33,325 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-05-03 15:07:33,407 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:07:33,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:07:33,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-05-03 15:07:33,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855849265] [2021-05-03 15:07:33,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 15:07:33,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:07:33,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 15:07:33,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-05-03 15:07:33,408 INFO L87 Difference]: Start difference. First operand 920 states and 2183 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) [2021-05-03 15:07:36,243 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-05-03 15:07:37,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:07:37,476 INFO L93 Difference]: Finished difference Result 2100 states and 5101 transitions. [2021-05-03 15:07:37,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 15:07:37,478 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 [2021-05-03 15:07:37,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:07:37,481 INFO L225 Difference]: With dead ends: 2100 [2021-05-03 15:07:37,481 INFO L226 Difference]: Without dead ends: 2090 [2021-05-03 15:07:37,481 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 2488.4ms TimeCoverageRelationStatistics Valid=204, Invalid=1128, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 15:07:37,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2021-05-03 15:07:37,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 914. [2021-05-03 15:07:37,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 913 states have (on average 2.375684556407448) internal successors, (2169), 913 states have internal predecessors, (2169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:07:37,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 2169 transitions. [2021-05-03 15:07:37,499 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 2169 transitions. Word has length 29 [2021-05-03 15:07:37,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:07:37,500 INFO L480 AbstractCegarLoop]: Abstraction has 914 states and 2169 transitions. [2021-05-03 15:07:37,500 INFO L481 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) [2021-05-03 15:07:37,500 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 2169 transitions. [2021-05-03 15:07:37,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:07:37,501 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:07:37,501 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:07:37,702 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:07:37,702 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:07:37,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:07:37,702 INFO L82 PathProgramCache]: Analyzing trace with hash 48077248, now seen corresponding path program 88 times [2021-05-03 15:07:37,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:07:37,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004112026] [2021-05-03 15:07:37,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:07:37,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:07:38,109 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-05-03 15:07:38,236 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-05-03 15:07:38,513 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:07:38,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004112026] [2021-05-03 15:07:38,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550547110] [2021-05-03 15:07:38,514 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 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 [2021-05-03 15:07:38,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:07:38,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:07:38,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:07:38,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:07:39,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-05-03 15:07:39,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:07:39,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:07:39,078 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:07:39,078 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-05-03 15:07:39,194 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:07:39,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:07:39,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-05-03 15:07:39,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713041869] [2021-05-03 15:07:39,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 15:07:39,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:07:39,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 15:07:39,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:07:39,195 INFO L87 Difference]: Start difference. First operand 914 states and 2169 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:07:40,165 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 31 [2021-05-03 15:07:41,061 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-05-03 15:07:41,211 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-05-03 15:07:41,525 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-05-03 15:07:41,787 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2021-05-03 15:07:42,517 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-05-03 15:07:42,749 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-05-03 15:07:42,978 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-05-03 15:07:43,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:07:43,921 INFO L93 Difference]: Finished difference Result 2106 states and 5144 transitions. [2021-05-03 15:07:43,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 15:07:43,924 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 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 [2021-05-03 15:07:43,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:07:43,927 INFO L225 Difference]: With dead ends: 2106 [2021-05-03 15:07:43,928 INFO L226 Difference]: Without dead ends: 2089 [2021-05-03 15:07:43,928 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 3379.4ms TimeCoverageRelationStatistics Valid=244, Invalid=1238, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 15:07:43,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-05-03 15:07:43,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 931. [2021-05-03 15:07:43,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 2.3806451612903228) internal successors, (2214), 930 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:07:43,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 2214 transitions. [2021-05-03 15:07:43,946 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 2214 transitions. Word has length 29 [2021-05-03 15:07:43,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:07:43,947 INFO L480 AbstractCegarLoop]: Abstraction has 931 states and 2214 transitions. [2021-05-03 15:07:43,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:07:43,947 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 2214 transitions. [2021-05-03 15:07:43,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:07:43,948 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:07:43,948 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:07:44,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:07:44,149 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:07:44,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:07:44,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1121753562, now seen corresponding path program 89 times [2021-05-03 15:07:44,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:07:44,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640147676] [2021-05-03 15:07:44,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:07:44,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:07:44,502 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-05-03 15:07:44,814 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:07:44,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640147676] [2021-05-03 15:07:44,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881180927] [2021-05-03 15:07:44,815 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 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 [2021-05-03 15:07:44,835 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 15:07:44,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:07:44,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:07:44,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:07:45,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-05-03 15:07:45,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:07:45,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:07:45,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:07:45,299 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-05-03 15:07:45,463 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:07:45,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:07:45,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-05-03 15:07:45,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539564210] [2021-05-03 15:07:45,464 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 15:07:45,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:07:45,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 15:07:45,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:07:45,465 INFO L87 Difference]: Start difference. First operand 931 states and 2214 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:07:45,782 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-05-03 15:07:46,275 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2021-05-03 15:07:47,767 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2021-05-03 15:07:48,673 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-05-03 15:07:48,827 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-05-03 15:07:49,085 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-05-03 15:07:49,471 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-05-03 15:07:49,808 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2021-05-03 15:07:50,174 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-05-03 15:07:50,487 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-05-03 15:07:50,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:07:50,980 INFO L93 Difference]: Finished difference Result 2627 states and 6455 transitions. [2021-05-03 15:07:50,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-03 15:07:50,983 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 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 [2021-05-03 15:07:50,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:07:50,987 INFO L225 Difference]: With dead ends: 2627 [2021-05-03 15:07:50,987 INFO L226 Difference]: Without dead ends: 2612 [2021-05-03 15:07:50,988 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 4527.8ms TimeCoverageRelationStatistics Valid=445, Invalid=1811, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 15:07:50,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2612 states. [2021-05-03 15:07:51,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2612 to 943. [2021-05-03 15:07:51,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 943 states, 942 states have (on average 2.381104033970276) internal successors, (2243), 942 states have internal predecessors, (2243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:07:51,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 2243 transitions. [2021-05-03 15:07:51,010 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 2243 transitions. Word has length 29 [2021-05-03 15:07:51,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:07:51,010 INFO L480 AbstractCegarLoop]: Abstraction has 943 states and 2243 transitions. [2021-05-03 15:07:51,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:07:51,010 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 2243 transitions. [2021-05-03 15:07:51,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:07:51,011 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:07:51,011 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:07:51,211 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2021-05-03 15:07:51,212 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:07:51,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:07:51,212 INFO L82 PathProgramCache]: Analyzing trace with hash 986952154, now seen corresponding path program 90 times [2021-05-03 15:07:51,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:07:51,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216167193] [2021-05-03 15:07:51,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:07:51,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:07:51,833 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-05-03 15:07:52,113 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:07:52,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216167193] [2021-05-03 15:07:52,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337180406] [2021-05-03 15:07:52,114 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 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 [2021-05-03 15:07:52,134 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 15:07:52,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:07:52,135 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:07:52,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:07:52,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:07:52,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-05-03 15:07:52,796 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:07:52,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:07:52,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:07:52,810 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-05-03 15:07:52,921 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:07:52,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:07:52,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-05-03 15:07:52,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114420894] [2021-05-03 15:07:52,922 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 15:07:52,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:07:52,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 15:07:52,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:07:52,922 INFO L87 Difference]: Start difference. First operand 943 states and 2243 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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) [2021-05-03 15:07:53,762 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-05-03 15:07:54,606 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-05-03 15:07:55,200 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-05-03 15:07:55,360 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2021-05-03 15:07:55,686 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-05-03 15:07:55,899 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-05-03 15:07:56,208 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-05-03 15:07:56,970 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-05-03 15:07:57,423 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-05-03 15:07:57,700 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-05-03 15:07:57,861 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-05-03 15:07:57,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:07:57,933 INFO L93 Difference]: Finished difference Result 2335 states and 5745 transitions. [2021-05-03 15:07:57,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-03 15:07:57,935 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 [2021-05-03 15:07:57,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:07:57,940 INFO L225 Difference]: With dead ends: 2335 [2021-05-03 15:07:57,940 INFO L226 Difference]: Without dead ends: 2312 [2021-05-03 15:07:57,940 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 4146.2ms TimeCoverageRelationStatistics Valid=342, Invalid=1380, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 15:07:57,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2312 states. [2021-05-03 15:07:57,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2312 to 956. [2021-05-03 15:07:57,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 955 states have (on average 2.386387434554974) internal successors, (2279), 955 states have internal predecessors, (2279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:07:57,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 2279 transitions. [2021-05-03 15:07:57,961 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 2279 transitions. Word has length 29 [2021-05-03 15:07:57,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:07:57,961 INFO L480 AbstractCegarLoop]: Abstraction has 956 states and 2279 transitions. [2021-05-03 15:07:57,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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) [2021-05-03 15:07:57,961 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 2279 transitions. [2021-05-03 15:07:57,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:07:57,963 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:07:57,963 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:07:58,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:07:58,163 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:07:58,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:07:58,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1887372330, now seen corresponding path program 91 times [2021-05-03 15:07:58,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:07:58,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960562114] [2021-05-03 15:07:58,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:07:58,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:07:58,655 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-05-03 15:07:58,833 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-05-03 15:07:59,089 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:07:59,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960562114] [2021-05-03 15:07:59,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325003425] [2021-05-03 15:07:59,090 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:07:59,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:07:59,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:07:59,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:07:59,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:07:59,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-05-03 15:07:59,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:07:59,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:07:59,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:07:59,608 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-05-03 15:07:59,731 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:07:59,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:07:59,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-05-03 15:07:59,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835925696] [2021-05-03 15:07:59,740 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 15:07:59,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:07:59,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 15:07:59,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-05-03 15:07:59,741 INFO L87 Difference]: Start difference. First operand 956 states and 2279 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-05-03 15:08:00,102 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-05-03 15:08:00,453 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2021-05-03 15:08:00,632 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-05-03 15:08:01,120 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-05-03 15:08:01,365 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-05-03 15:08:02,420 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2021-05-03 15:08:03,100 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-05-03 15:08:03,429 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-05-03 15:08:04,144 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-05-03 15:08:04,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:08:04,563 INFO L93 Difference]: Finished difference Result 2784 states and 6931 transitions. [2021-05-03 15:08:04,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 15:08:04,567 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 [2021-05-03 15:08:04,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:08:04,571 INFO L225 Difference]: With dead ends: 2784 [2021-05-03 15:08:04,571 INFO L226 Difference]: Without dead ends: 2770 [2021-05-03 15:08:04,572 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 3902.7ms TimeCoverageRelationStatistics Valid=318, Invalid=1242, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 15:08:04,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2770 states. [2021-05-03 15:08:04,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2770 to 974. [2021-05-03 15:08:04,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 973 states have (on average 2.3884892086330933) internal successors, (2324), 973 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:08:04,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 2324 transitions. [2021-05-03 15:08:04,599 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 2324 transitions. Word has length 29 [2021-05-03 15:08:04,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:08:04,599 INFO L480 AbstractCegarLoop]: Abstraction has 974 states and 2324 transitions. [2021-05-03 15:08:04,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-05-03 15:08:04,599 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 2324 transitions. [2021-05-03 15:08:04,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:08:04,600 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:08:04,600 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:08:04,801 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-05-03 15:08:04,801 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:08:04,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:08:04,802 INFO L82 PathProgramCache]: Analyzing trace with hash -651193916, now seen corresponding path program 92 times [2021-05-03 15:08:04,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:08:04,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629421071] [2021-05-03 15:08:04,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:08:04,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:08:05,337 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-05-03 15:08:05,565 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:08:05,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629421071] [2021-05-03 15:08:05,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056665801] [2021-05-03 15:08:05,565 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:08:05,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:08:05,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:08:05,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:08:05,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:08:05,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-05-03 15:08:05,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:08:05,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:08:05,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:08:05,991 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-05-03 15:08:06,108 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:08:06,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:08:06,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-05-03 15:08:06,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404130155] [2021-05-03 15:08:06,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 15:08:06,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:08:06,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 15:08:06,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-05-03 15:08:06,110 INFO L87 Difference]: Start difference. First operand 974 states and 2324 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-05-03 15:08:06,496 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-05-03 15:08:06,885 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2021-05-03 15:08:07,079 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-05-03 15:08:07,492 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-05-03 15:08:07,927 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-05-03 15:08:08,691 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-05-03 15:08:09,538 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-05-03 15:08:10,064 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-05-03 15:08:10,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:08:10,552 INFO L93 Difference]: Finished difference Result 2499 states and 6199 transitions. [2021-05-03 15:08:10,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 15:08:10,555 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 [2021-05-03 15:08:10,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:08:10,559 INFO L225 Difference]: With dead ends: 2499 [2021-05-03 15:08:10,559 INFO L226 Difference]: Without dead ends: 2482 [2021-05-03 15:08:10,559 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 3483.6ms TimeCoverageRelationStatistics Valid=294, Invalid=1188, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 15:08:10,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2482 states. [2021-05-03 15:08:10,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2482 to 958. [2021-05-03 15:08:10,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 957 states have (on average 2.3887147335423196) internal successors, (2286), 957 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:08:10,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 2286 transitions. [2021-05-03 15:08:10,579 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 2286 transitions. Word has length 29 [2021-05-03 15:08:10,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:08:10,579 INFO L480 AbstractCegarLoop]: Abstraction has 958 states and 2286 transitions. [2021-05-03 15:08:10,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-05-03 15:08:10,580 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 2286 transitions. [2021-05-03 15:08:10,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:08:10,581 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:08:10,581 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:08:10,781 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-05-03 15:08:10,781 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:08:10,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:08:10,782 INFO L82 PathProgramCache]: Analyzing trace with hash 877760152, now seen corresponding path program 93 times [2021-05-03 15:08:10,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:08:10,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214950981] [2021-05-03 15:08:10,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:08:10,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:08:11,162 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-05-03 15:08:11,290 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-05-03 15:08:11,489 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:08:11,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214950981] [2021-05-03 15:08:11,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910238970] [2021-05-03 15:08:11,489 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:08:11,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 15:08:11,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:08:11,511 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:08:11,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:08:12,334 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:08:12,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-05-03 15:08:12,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:08:12,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:08:12,457 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:08:12,457 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:132 [2021-05-03 15:08:12,835 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-05-03 15:08:13,475 WARN L205 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-05-03 15:08:13,593 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:08:13,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:08:13,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-05-03 15:08:13,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270290079] [2021-05-03 15:08:13,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 15:08:13,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:08:13,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 15:08:13,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-05-03 15:08:13,594 INFO L87 Difference]: Start difference. First operand 958 states and 2286 transitions. Second operand has 25 states, 25 states have (on average 2.04) 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) [2021-05-03 15:08:14,011 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 25 [2021-05-03 15:08:14,509 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 32 [2021-05-03 15:08:15,318 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-05-03 15:08:15,710 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-05-03 15:08:16,321 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-05-03 15:08:16,823 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 26 [2021-05-03 15:08:17,381 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-05-03 15:08:18,560 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-05-03 15:08:18,780 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-05-03 15:08:18,978 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-05-03 15:08:19,512 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2021-05-03 15:08:19,921 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2021-05-03 15:08:20,255 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-05-03 15:08:21,602 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-05-03 15:08:21,971 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-05-03 15:08:22,383 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-05-03 15:08:23,028 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-05-03 15:08:23,293 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-05-03 15:08:24,277 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 23 [2021-05-03 15:08:24,566 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 23 [2021-05-03 15:08:24,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:08:24,733 INFO L93 Difference]: Finished difference Result 2330 states and 5706 transitions. [2021-05-03 15:08:24,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-03 15:08:24,737 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) 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 [2021-05-03 15:08:24,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:08:24,740 INFO L225 Difference]: With dead ends: 2330 [2021-05-03 15:08:24,740 INFO L226 Difference]: Without dead ends: 2317 [2021-05-03 15:08:24,741 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 863 ImplicationChecksByTransitivity, 8294.4ms TimeCoverageRelationStatistics Valid=409, Invalid=3013, Unknown=0, NotChecked=0, Total=3422 [2021-05-03 15:08:24,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2317 states. [2021-05-03 15:08:24,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2317 to 958. [2021-05-03 15:08:24,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 957 states have (on average 2.3887147335423196) internal successors, (2286), 957 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:08:24,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 2286 transitions. [2021-05-03 15:08:24,759 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 2286 transitions. Word has length 29 [2021-05-03 15:08:24,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:08:24,759 INFO L480 AbstractCegarLoop]: Abstraction has 958 states and 2286 transitions. [2021-05-03 15:08:24,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) 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) [2021-05-03 15:08:24,759 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 2286 transitions. [2021-05-03 15:08:24,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:08:24,761 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:08:24,761 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:08:24,961 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-05-03 15:08:24,961 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:08:24,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:08:24,962 INFO L82 PathProgramCache]: Analyzing trace with hash 106621528, now seen corresponding path program 94 times [2021-05-03 15:08:24,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:08:24,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806441072] [2021-05-03 15:08:24,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:08:24,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:08:25,686 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:08:25,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806441072] [2021-05-03 15:08:25,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778614907] [2021-05-03 15:08:25,687 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:08:25,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:08:25,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:08:25,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:08:25,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:08:26,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-05-03 15:08:26,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:08:26,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:08:26,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:08:26,280 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-05-03 15:08:26,403 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:08:26,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:08:26,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-05-03 15:08:26,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211828045] [2021-05-03 15:08:26,403 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 15:08:26,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:08:26,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 15:08:26,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:08:26,404 INFO L87 Difference]: Start difference. First operand 958 states and 2286 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 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) [2021-05-03 15:08:26,759 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-05-03 15:08:27,563 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-05-03 15:08:27,741 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-05-03 15:08:28,127 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-05-03 15:08:28,480 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2021-05-03 15:08:28,910 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2021-05-03 15:08:31,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:08:31,372 INFO L93 Difference]: Finished difference Result 2327 states and 5701 transitions. [2021-05-03 15:08:31,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 15:08:31,375 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 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 [2021-05-03 15:08:31,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:08:31,379 INFO L225 Difference]: With dead ends: 2327 [2021-05-03 15:08:31,379 INFO L226 Difference]: Without dead ends: 2317 [2021-05-03 15:08:31,379 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 3255.2ms TimeCoverageRelationStatistics Valid=285, Invalid=1355, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 15:08:31,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2317 states. [2021-05-03 15:08:31,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2317 to 949. [2021-05-03 15:08:31,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 949 states, 948 states have (on average 2.3860759493670884) internal successors, (2262), 948 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:08:31,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 2262 transitions. [2021-05-03 15:08:31,398 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 2262 transitions. Word has length 29 [2021-05-03 15:08:31,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:08:31,398 INFO L480 AbstractCegarLoop]: Abstraction has 949 states and 2262 transitions. [2021-05-03 15:08:31,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 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) [2021-05-03 15:08:31,399 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 2262 transitions. [2021-05-03 15:08:31,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:08:31,400 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:08:31,400 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:08:31,612 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-05-03 15:08:31,613 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:08:31,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:08:31,613 INFO L82 PathProgramCache]: Analyzing trace with hash -296310166, now seen corresponding path program 95 times [2021-05-03 15:08:31,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:08:31,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097860804] [2021-05-03 15:08:31,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:08:31,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:08:32,109 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-05-03 15:08:32,392 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:08:32,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097860804] [2021-05-03 15:08:32,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86818953] [2021-05-03 15:08:32,393 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:08:32,411 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 15:08:32,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:08:32,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:08:32,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:08:32,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-05-03 15:08:32,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:08:32,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:08:32,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:08:32,968 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-05-03 15:08:33,082 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:08:33,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:08:33,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-05-03 15:08:33,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280203922] [2021-05-03 15:08:33,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 15:08:33,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:08:33,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 15:08:33,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:08:33,083 INFO L87 Difference]: Start difference. First operand 949 states and 2262 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:08:34,394 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 25 [2021-05-03 15:08:35,150 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-05-03 15:08:35,531 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-05-03 15:08:35,755 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-05-03 15:08:35,954 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-05-03 15:08:36,356 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-05-03 15:08:37,065 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-05-03 15:08:37,456 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-05-03 15:08:37,871 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 [2021-05-03 15:08:38,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:08:38,429 INFO L93 Difference]: Finished difference Result 2318 states and 5637 transitions. [2021-05-03 15:08:38,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 15:08:38,432 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 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 [2021-05-03 15:08:38,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:08:38,436 INFO L225 Difference]: With dead ends: 2318 [2021-05-03 15:08:38,436 INFO L226 Difference]: Without dead ends: 2301 [2021-05-03 15:08:38,437 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 3571.1ms TimeCoverageRelationStatistics Valid=266, Invalid=1294, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 15:08:38,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2021-05-03 15:08:38,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 967. [2021-05-03 15:08:38,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 967 states, 966 states have (on average 2.390269151138716) internal successors, (2309), 966 states have internal predecessors, (2309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:08:38,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 2309 transitions. [2021-05-03 15:08:38,456 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 2309 transitions. Word has length 29 [2021-05-03 15:08:38,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:08:38,456 INFO L480 AbstractCegarLoop]: Abstraction has 967 states and 2309 transitions. [2021-05-03 15:08:38,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:08:38,456 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 2309 transitions. [2021-05-03 15:08:38,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:08:38,458 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:08:38,458 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:08:38,658 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2021-05-03 15:08:38,658 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:08:38,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:08:38,659 INFO L82 PathProgramCache]: Analyzing trace with hash 777366148, now seen corresponding path program 96 times [2021-05-03 15:08:38,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:08:38,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639919363] [2021-05-03 15:08:38,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:08:38,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:08:39,200 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-05-03 15:08:39,533 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:08:39,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639919363] [2021-05-03 15:08:39,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680747782] [2021-05-03 15:08:39,533 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:08:39,552 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 15:08:39,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:08:39,553 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 15:08:39,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:08:40,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:08:40,175 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 25 treesize of output 13 [2021-05-03 15:08:40,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:08:40,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:08:40,199 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:08:40,199 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:15 [2021-05-03 15:08:40,440 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:08:40,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:08:40,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-05-03 15:08:40,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753397852] [2021-05-03 15:08:40,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 15:08:40,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:08:40,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 15:08:40,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2021-05-03 15:08:40,441 INFO L87 Difference]: Start difference. First operand 967 states and 2309 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:08:40,810 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-05-03 15:08:41,317 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2021-05-03 15:08:42,266 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2021-05-03 15:08:42,458 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-05-03 15:08:44,266 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-05-03 15:08:44,661 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-05-03 15:08:45,058 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-05-03 15:08:45,298 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-05-03 15:08:45,697 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-05-03 15:08:45,866 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-05-03 15:08:46,099 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-05-03 15:08:46,393 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-05-03 15:08:47,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:08:47,575 INFO L93 Difference]: Finished difference Result 2746 states and 6763 transitions. [2021-05-03 15:08:47,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-03 15:08:47,578 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 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 [2021-05-03 15:08:47,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:08:47,582 INFO L225 Difference]: With dead ends: 2746 [2021-05-03 15:08:47,582 INFO L226 Difference]: Without dead ends: 2731 [2021-05-03 15:08:47,583 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 5536.1ms TimeCoverageRelationStatistics Valid=540, Invalid=2322, Unknown=0, NotChecked=0, Total=2862 [2021-05-03 15:08:47,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2731 states. [2021-05-03 15:08:47,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2731 to 995. [2021-05-03 15:08:47,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 994 states have (on average 2.393360160965795) internal successors, (2379), 994 states have internal predecessors, (2379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:08:47,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 2379 transitions. [2021-05-03 15:08:47,604 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 2379 transitions. Word has length 29 [2021-05-03 15:08:47,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:08:47,605 INFO L480 AbstractCegarLoop]: Abstraction has 995 states and 2379 transitions. [2021-05-03 15:08:47,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:08:47,605 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 2379 transitions. [2021-05-03 15:08:47,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:08:47,606 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:08:47,606 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:08:47,806 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:08:47,807 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:08:47,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:08:47,807 INFO L82 PathProgramCache]: Analyzing trace with hash 642564740, now seen corresponding path program 97 times [2021-05-03 15:08:47,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:08:47,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301990361] [2021-05-03 15:08:47,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:08:47,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:08:48,074 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2021-05-03 15:08:48,376 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-05-03 15:08:48,686 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:08:48,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301990361] [2021-05-03 15:08:48,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672677824] [2021-05-03 15:08:48,687 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:08:48,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:08:48,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:08:48,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:08:49,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:08:49,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-05-03 15:08:49,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:08:49,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:08:49,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:08:49,257 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-05-03 15:08:49,355 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:08:49,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:08:49,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-05-03 15:08:49,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382946627] [2021-05-03 15:08:49,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 15:08:49,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:08:49,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 15:08:49,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:08:49,356 INFO L87 Difference]: Start difference. First operand 995 states and 2379 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 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) [2021-05-03 15:08:50,058 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-05-03 15:08:51,672 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2021-05-03 15:08:51,927 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-05-03 15:08:52,165 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-05-03 15:08:52,371 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-05-03 15:08:52,675 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-05-03 15:08:52,856 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2021-05-03 15:08:53,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:08:53,746 INFO L93 Difference]: Finished difference Result 2430 states and 5984 transitions. [2021-05-03 15:08:53,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 15:08:53,749 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 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 [2021-05-03 15:08:53,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:08:53,753 INFO L225 Difference]: With dead ends: 2430 [2021-05-03 15:08:53,753 INFO L226 Difference]: Without dead ends: 2412 [2021-05-03 15:08:53,753 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 3334.7ms TimeCoverageRelationStatistics Valid=266, Invalid=1066, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 15:08:53,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-05-03 15:08:53,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 991. [2021-05-03 15:08:53,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 990 states have (on average 2.393939393939394) internal successors, (2370), 990 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:08:53,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 2370 transitions. [2021-05-03 15:08:53,777 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 2370 transitions. Word has length 29 [2021-05-03 15:08:53,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:08:53,777 INFO L480 AbstractCegarLoop]: Abstraction has 991 states and 2370 transitions. [2021-05-03 15:08:53,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 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) [2021-05-03 15:08:53,777 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 2370 transitions. [2021-05-03 15:08:53,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:08:53,779 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:08:53,779 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:08:53,981 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-05-03 15:08:53,981 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:08:53,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:08:53,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1613880414, now seen corresponding path program 98 times [2021-05-03 15:08:53,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:08:53,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977594451] [2021-05-03 15:08:53,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:08:53,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:08:54,741 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:08:54,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977594451] [2021-05-03 15:08:54,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528888637] [2021-05-03 15:08:54,741 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:08:54,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:08:54,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:08:54,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:08:54,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:08:55,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:08:55,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-05-03 15:08:55,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:08:55,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:08:55,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:08:55,361 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-05-03 15:08:55,514 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:08:55,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:08:55,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-05-03 15:08:55,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559927379] [2021-05-03 15:08:55,515 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 15:08:55,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:08:55,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 15:08:55,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:08:55,515 INFO L87 Difference]: Start difference. First operand 991 states and 2370 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:08:55,891 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-05-03 15:08:56,042 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-05-03 15:08:56,462 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2021-05-03 15:08:56,667 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 21 [2021-05-03 15:08:57,406 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2021-05-03 15:08:57,607 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-05-03 15:08:58,558 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2021-05-03 15:08:58,805 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-05-03 15:08:59,180 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-05-03 15:08:59,392 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-05-03 15:08:59,670 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-05-03 15:09:00,022 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-05-03 15:09:00,468 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-05-03 15:09:00,893 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-05-03 15:09:01,288 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-05-03 15:09:01,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:09:01,618 INFO L93 Difference]: Finished difference Result 2822 states and 6939 transitions. [2021-05-03 15:09:01,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-03 15:09:01,621 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 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 [2021-05-03 15:09:01,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:09:01,625 INFO L225 Difference]: With dead ends: 2822 [2021-05-03 15:09:01,626 INFO L226 Difference]: Without dead ends: 2812 [2021-05-03 15:09:01,626 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 4839.6ms TimeCoverageRelationStatistics Valid=448, Invalid=1714, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 15:09:01,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2812 states. [2021-05-03 15:09:01,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2812 to 981. [2021-05-03 15:09:01,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 980 states have (on average 2.3887755102040815) internal successors, (2341), 980 states have internal predecessors, (2341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:09:01,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 2341 transitions. [2021-05-03 15:09:01,649 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 2341 transitions. Word has length 29 [2021-05-03 15:09:01,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:09:01,650 INFO L480 AbstractCegarLoop]: Abstraction has 981 states and 2341 transitions. [2021-05-03 15:09:01,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:09:01,650 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 2341 transitions. [2021-05-03 15:09:01,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:09:01,651 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:09:01,651 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:09:01,868 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:09:01,869 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:09:01,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:09:01,869 INFO L82 PathProgramCache]: Analyzing trace with hash -608198470, now seen corresponding path program 99 times [2021-05-03 15:09:01,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:09:01,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849327129] [2021-05-03 15:09:01,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:09:01,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:09:02,603 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:09:02,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849327129] [2021-05-03 15:09:02,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436371303] [2021-05-03 15:09:02,604 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:09:02,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 15:09:02,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:09:02,624 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:09:02,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:09:03,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-05-03 15:09:03,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:09:03,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:09:03,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:09:03,450 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-05-03 15:09:03,564 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:09:03,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:09:03,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-05-03 15:09:03,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168461067] [2021-05-03 15:09:03,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 15:09:03,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:09:03,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 15:09:03,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-05-03 15:09:03,565 INFO L87 Difference]: Start difference. First operand 981 states and 2341 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:09:05,786 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-05-03 15:09:06,362 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 [2021-05-03 15:09:06,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:09:06,507 INFO L93 Difference]: Finished difference Result 2159 states and 5265 transitions. [2021-05-03 15:09:06,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 15:09:06,510 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 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 [2021-05-03 15:09:06,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:09:06,514 INFO L225 Difference]: With dead ends: 2159 [2021-05-03 15:09:06,514 INFO L226 Difference]: Without dead ends: 2150 [2021-05-03 15:09:06,514 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 2635.4ms TimeCoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 15:09:06,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2150 states. [2021-05-03 15:09:06,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2150 to 979. [2021-05-03 15:09:06,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 979 states, 978 states have (on average 2.3885480572597135) internal successors, (2336), 978 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:09:06,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 979 states to 979 states and 2336 transitions. [2021-05-03 15:09:06,533 INFO L78 Accepts]: Start accepts. Automaton has 979 states and 2336 transitions. Word has length 29 [2021-05-03 15:09:06,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:09:06,533 INFO L480 AbstractCegarLoop]: Abstraction has 979 states and 2336 transitions. [2021-05-03 15:09:06,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:09:06,533 INFO L276 IsEmpty]: Start isEmpty. Operand 979 states and 2336 transitions. [2021-05-03 15:09:06,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:09:06,534 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:09:06,535 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:09:06,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:09:06,736 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:09:06,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:09:06,736 INFO L82 PathProgramCache]: Analyzing trace with hash -154214669, now seen corresponding path program 1 times [2021-05-03 15:09:06,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:09:06,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193791638] [2021-05-03 15:09:06,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:09:06,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:09:07,656 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:09:07,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193791638] [2021-05-03 15:09:07,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132839075] [2021-05-03 15:09:07,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:09:07,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:09:07,676 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:09:07,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:09:08,392 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-05-03 15:09:08,393 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 44 [2021-05-03 15:09:08,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:09:08,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:09:08,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:09:08,413 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:11 [2021-05-03 15:09:08,509 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:09:08,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:09:08,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-05-03 15:09:08,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321580958] [2021-05-03 15:09:08,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 15:09:08,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:09:08,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 15:09:08,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:09:08,510 INFO L87 Difference]: Start difference. First operand 979 states and 2336 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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) [2021-05-03 15:09:10,347 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-05-03 15:09:11,018 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-03 15:09:13,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:09:13,068 INFO L93 Difference]: Finished difference Result 2371 states and 5769 transitions. [2021-05-03 15:09:13,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 15:09:13,071 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 30 [2021-05-03 15:09:13,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:09:13,074 INFO L225 Difference]: With dead ends: 2371 [2021-05-03 15:09:13,075 INFO L226 Difference]: Without dead ends: 2361 [2021-05-03 15:09:13,075 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 2662.6ms TimeCoverageRelationStatistics Valid=206, Invalid=850, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 15:09:13,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2021-05-03 15:09:13,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 982. [2021-05-03 15:09:13,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 981 states have (on average 2.3863404689092764) internal successors, (2341), 981 states have internal predecessors, (2341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:09:13,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 2341 transitions. [2021-05-03 15:09:13,095 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 2341 transitions. Word has length 30 [2021-05-03 15:09:13,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:09:13,095 INFO L480 AbstractCegarLoop]: Abstraction has 982 states and 2341 transitions. [2021-05-03 15:09:13,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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) [2021-05-03 15:09:13,095 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 2341 transitions. [2021-05-03 15:09:13,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:09:13,096 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:09:13,096 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:09:13,297 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:09:13,297 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:09:13,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:09:13,299 INFO L82 PathProgramCache]: Analyzing trace with hash 351841351, now seen corresponding path program 2 times [2021-05-03 15:09:13,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:09:13,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878404608] [2021-05-03 15:09:13,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:09:13,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:09:14,177 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:09:14,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878404608] [2021-05-03 15:09:14,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371942011] [2021-05-03 15:09:14,177 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:09:14,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:09:14,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:09:14,204 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:09:14,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:09:14,836 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-05-03 15:09:14,836 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 44 [2021-05-03 15:09:14,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:09:14,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:09:14,857 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:09:14,857 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:14 [2021-05-03 15:09:14,969 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:09:14,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:09:14,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-05-03 15:09:14,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119068540] [2021-05-03 15:09:14,969 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 15:09:14,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:09:14,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 15:09:14,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:09:14,970 INFO L87 Difference]: Start difference. First operand 982 states and 2341 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) [2021-05-03 15:09:15,649 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-05-03 15:09:15,938 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-05-03 15:09:16,508 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-05-03 15:09:17,687 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2021-05-03 15:09:18,540 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-05-03 15:09:19,192 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2021-05-03 15:09:21,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:09:21,050 INFO L93 Difference]: Finished difference Result 2565 states and 6278 transitions. [2021-05-03 15:09:21,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 15:09:21,052 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 30 [2021-05-03 15:09:21,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:09:21,056 INFO L225 Difference]: With dead ends: 2565 [2021-05-03 15:09:21,056 INFO L226 Difference]: Without dead ends: 2554 [2021-05-03 15:09:21,056 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 3373.0ms TimeCoverageRelationStatistics Valid=241, Invalid=1165, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 15:09:21,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2554 states. [2021-05-03 15:09:21,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2554 to 1016. [2021-05-03 15:09:21,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 1015 states have (on average 2.3970443349753694) internal successors, (2433), 1015 states have internal predecessors, (2433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:09:21,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 2433 transitions. [2021-05-03 15:09:21,076 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 2433 transitions. Word has length 30 [2021-05-03 15:09:21,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:09:21,076 INFO L480 AbstractCegarLoop]: Abstraction has 1016 states and 2433 transitions. [2021-05-03 15:09:21,076 INFO L481 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) [2021-05-03 15:09:21,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 2433 transitions. [2021-05-03 15:09:21,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:09:21,077 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:09:21,077 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:09:21,278 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-05-03 15:09:21,278 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:09:21,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:09:21,278 INFO L82 PathProgramCache]: Analyzing trace with hash 2108242401, now seen corresponding path program 3 times [2021-05-03 15:09:21,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:09:21,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037974632] [2021-05-03 15:09:21,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:09:21,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:09:22,077 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:09:22,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037974632] [2021-05-03 15:09:22,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354411537] [2021-05-03 15:09:22,077 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:09:22,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 15:09:22,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:09:22,099 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 15:09:22,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:09:23,039 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:09:23,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-05-03 15:09:23,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:09:23,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:09:23,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:09:23,132 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:95 [2021-05-03 15:09:23,449 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-05-03 15:09:23,866 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-05-03 15:09:24,010 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:09:24,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:09:24,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-05-03 15:09:24,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110169930] [2021-05-03 15:09:24,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 15:09:24,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:09:24,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 15:09:24,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-05-03 15:09:24,011 INFO L87 Difference]: Start difference. First operand 1016 states and 2433 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) 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) [2021-05-03 15:09:24,641 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-05-03 15:09:25,038 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-05-03 15:09:25,243 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 22 [2021-05-03 15:09:25,750 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 24 [2021-05-03 15:09:25,983 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-05-03 15:09:26,554 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2021-05-03 15:09:27,091 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 30 [2021-05-03 15:09:27,512 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-05-03 15:09:28,368 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 35 [2021-05-03 15:09:28,691 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 26 [2021-05-03 15:09:28,992 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-05-03 15:09:29,333 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-05-03 15:09:29,780 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 26 [2021-05-03 15:09:30,864 WARN L205 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-05-03 15:09:31,365 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2021-05-03 15:09:31,664 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 31 [2021-05-03 15:09:31,930 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-05-03 15:09:32,470 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 22 [2021-05-03 15:09:32,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:09:32,662 INFO L93 Difference]: Finished difference Result 2563 states and 6314 transitions. [2021-05-03 15:09:32,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-03 15:09:32,665 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) 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 30 [2021-05-03 15:09:32,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:09:32,668 INFO L225 Difference]: With dead ends: 2563 [2021-05-03 15:09:32,669 INFO L226 Difference]: Without dead ends: 2550 [2021-05-03 15:09:32,669 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 7009.3ms TimeCoverageRelationStatistics Valid=486, Invalid=2270, Unknown=0, NotChecked=0, Total=2756 [2021-05-03 15:09:32,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2550 states. [2021-05-03 15:09:32,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2550 to 1017. [2021-05-03 15:09:32,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1017 states, 1016 states have (on average 2.392716535433071) internal successors, (2431), 1016 states have internal predecessors, (2431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:09:32,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 2431 transitions. [2021-05-03 15:09:32,689 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 2431 transitions. Word has length 30 [2021-05-03 15:09:32,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:09:32,689 INFO L480 AbstractCegarLoop]: Abstraction has 1017 states and 2431 transitions. [2021-05-03 15:09:32,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8461538461538463) 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) [2021-05-03 15:09:32,689 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 2431 transitions. [2021-05-03 15:09:32,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:09:32,690 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:09:32,691 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:09:32,892 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-05-03 15:09:32,892 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:09:32,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:09:32,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1190292211, now seen corresponding path program 4 times [2021-05-03 15:09:32,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:09:32,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445065494] [2021-05-03 15:09:32,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:09:32,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:09:33,773 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:09:33,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445065494] [2021-05-03 15:09:33,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036774373] [2021-05-03 15:09:33,774 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:09:33,793 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:09:33,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:09:33,795 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 15:09:33,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:09:34,575 INFO L354 Elim1Store]: treesize reduction 29, result has 40.8 percent of original size [2021-05-03 15:09:34,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 64 [2021-05-03 15:09:34,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:09:34,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:09:34,660 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:09:34,661 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:80, output treesize:34 [2021-05-03 15:09:35,111 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:09:35,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:09:35,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 24 [2021-05-03 15:09:35,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246607855] [2021-05-03 15:09:35,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 15:09:35,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:09:35,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 15:09:35,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2021-05-03 15:09:35,113 INFO L87 Difference]: Start difference. First operand 1017 states and 2431 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 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) [2021-05-03 15:09:35,565 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-05-03 15:09:35,830 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-05-03 15:09:36,517 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-05-03 15:09:36,889 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-05-03 15:09:37,115 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-05-03 15:09:38,330 WARN L205 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-05-03 15:09:39,275 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 34 [2021-05-03 15:09:39,768 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-05-03 15:09:40,805 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-05-03 15:09:41,042 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-05-03 15:09:41,449 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-05-03 15:09:41,697 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-05-03 15:09:41,934 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-05-03 15:09:42,734 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-05-03 15:09:43,389 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-05-03 15:09:43,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:09:43,804 INFO L93 Difference]: Finished difference Result 2943 states and 7182 transitions. [2021-05-03 15:09:43,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-03 15:09:43,806 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 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 30 [2021-05-03 15:09:43,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:09:43,810 INFO L225 Difference]: With dead ends: 2943 [2021-05-03 15:09:43,811 INFO L226 Difference]: Without dead ends: 2929 [2021-05-03 15:09:43,811 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 6462.3ms TimeCoverageRelationStatistics Valid=567, Invalid=1983, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 15:09:43,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2929 states. [2021-05-03 15:09:43,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2929 to 1010. [2021-05-03 15:09:43,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1010 states, 1009 states have (on average 2.389494549058474) internal successors, (2411), 1009 states have internal predecessors, (2411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:09:43,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 2411 transitions. [2021-05-03 15:09:43,832 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 2411 transitions. Word has length 30 [2021-05-03 15:09:43,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:09:43,832 INFO L480 AbstractCegarLoop]: Abstraction has 1010 states and 2411 transitions. [2021-05-03 15:09:43,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 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) [2021-05-03 15:09:43,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 2411 transitions. [2021-05-03 15:09:43,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:09:43,833 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:09:43,833 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:09:44,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:09:44,034 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:09:44,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:09:44,034 INFO L82 PathProgramCache]: Analyzing trace with hash 111955279, now seen corresponding path program 5 times [2021-05-03 15:09:44,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:09:44,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380986878] [2021-05-03 15:09:44,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:09:44,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:09:44,881 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:09:44,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380986878] [2021-05-03 15:09:44,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407725637] [2021-05-03 15:09:44,882 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:09:44,900 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 15:09:44,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:09:44,901 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:09:44,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:09:45,506 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-05-03 15:09:45,506 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 44 [2021-05-03 15:09:45,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:09:45,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:09:45,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:09:45,526 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:14 [2021-05-03 15:09:45,694 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:09:45,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:09:45,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-05-03 15:09:45,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264703332] [2021-05-03 15:09:45,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 15:09:45,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:09:45,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 15:09:45,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:09:45,695 INFO L87 Difference]: Start difference. First operand 1010 states and 2411 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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) [2021-05-03 15:09:46,649 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-05-03 15:09:46,875 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-05-03 15:09:47,616 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-05-03 15:09:48,321 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-05-03 15:09:48,901 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-05-03 15:09:49,825 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-05-03 15:09:50,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:09:50,864 INFO L93 Difference]: Finished difference Result 2643 states and 6445 transitions. [2021-05-03 15:09:50,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 15:09:50,867 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 30 [2021-05-03 15:09:50,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:09:50,870 INFO L225 Difference]: With dead ends: 2643 [2021-05-03 15:09:50,870 INFO L226 Difference]: Without dead ends: 2626 [2021-05-03 15:09:50,870 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 3453.2ms TimeCoverageRelationStatistics Valid=315, Invalid=1325, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 15:09:50,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2626 states. [2021-05-03 15:09:50,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2626 to 1005. [2021-05-03 15:09:50,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1005 states, 1004 states have (on average 2.389442231075697) internal successors, (2399), 1004 states have internal predecessors, (2399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:09:50,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 2399 transitions. [2021-05-03 15:09:50,889 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 2399 transitions. Word has length 30 [2021-05-03 15:09:50,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:09:50,889 INFO L480 AbstractCegarLoop]: Abstraction has 1005 states and 2399 transitions. [2021-05-03 15:09:50,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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) [2021-05-03 15:09:50,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 2399 transitions. [2021-05-03 15:09:50,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:09:50,891 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:09:50,891 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:09:51,091 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable246,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:09:51,091 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:09:51,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:09:51,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1651280687, now seen corresponding path program 6 times [2021-05-03 15:09:51,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:09:51,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732007459] [2021-05-03 15:09:51,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:09:51,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:09:51,887 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:09:51,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732007459] [2021-05-03 15:09:51,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073145469] [2021-05-03 15:09:51,887 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:09:51,907 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 15:09:51,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:09:51,908 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:09:51,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:09:52,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-05-03 15:09:52,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:09:52,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:09:52,544 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:09:52,545 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:11 [2021-05-03 15:09:52,645 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:09:52,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:09:52,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-05-03 15:09:52,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122657783] [2021-05-03 15:09:52,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 15:09:52,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:09:52,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 15:09:52,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:09:52,646 INFO L87 Difference]: Start difference. First operand 1005 states and 2399 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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) [2021-05-03 15:09:53,602 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-05-03 15:09:54,909 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-05-03 15:09:57,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:09:57,189 INFO L93 Difference]: Finished difference Result 2434 states and 5906 transitions. [2021-05-03 15:09:57,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 15:09:57,193 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 30 [2021-05-03 15:09:57,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:09:57,196 INFO L225 Difference]: With dead ends: 2434 [2021-05-03 15:09:57,197 INFO L226 Difference]: Without dead ends: 2414 [2021-05-03 15:09:57,197 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 2848.0ms TimeCoverageRelationStatistics Valid=282, Invalid=1050, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 15:09:57,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2414 states. [2021-05-03 15:09:57,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2414 to 1003. [2021-05-03 15:09:57,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 1002 states have (on average 2.3892215568862274) internal successors, (2394), 1002 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:09:57,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 2394 transitions. [2021-05-03 15:09:57,216 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 2394 transitions. Word has length 30 [2021-05-03 15:09:57,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:09:57,216 INFO L480 AbstractCegarLoop]: Abstraction has 1003 states and 2394 transitions. [2021-05-03 15:09:57,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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) [2021-05-03 15:09:57,217 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 2394 transitions. [2021-05-03 15:09:57,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:09:57,218 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:09:57,218 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:09:57,418 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2021-05-03 15:09:57,419 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:09:57,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:09:57,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1006114153, now seen corresponding path program 7 times [2021-05-03 15:09:57,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:09:57,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52057512] [2021-05-03 15:09:57,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:09:57,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:09:58,298 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:09:58,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52057512] [2021-05-03 15:09:58,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478094874] [2021-05-03 15:09:58,299 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:09:58,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:09:58,318 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 15:09:58,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:09:59,207 INFO L354 Elim1Store]: treesize reduction 29, result has 40.8 percent of original size [2021-05-03 15:09:59,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 64 [2021-05-03 15:09:59,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:09:59,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:09:59,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:09:59,268 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:77, output treesize:31 [2021-05-03 15:09:59,605 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:09:59,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:09:59,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 24 [2021-05-03 15:09:59,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687218486] [2021-05-03 15:09:59,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 15:09:59,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:09:59,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 15:09:59,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2021-05-03 15:09:59,606 INFO L87 Difference]: Start difference. First operand 1003 states and 2394 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 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) [2021-05-03 15:10:00,284 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-05-03 15:10:00,592 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-05-03 15:10:00,932 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 15:10:01,494 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2021-05-03 15:10:02,187 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-05-03 15:10:02,605 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-05-03 15:10:02,910 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-05-03 15:10:04,130 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-05-03 15:10:04,531 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-05-03 15:10:04,808 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-05-03 15:10:05,532 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-05-03 15:10:06,106 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-05-03 15:10:06,311 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-05-03 15:10:06,519 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-05-03 15:10:06,927 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-05-03 15:10:08,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:10:08,190 INFO L93 Difference]: Finished difference Result 2555 states and 6195 transitions. [2021-05-03 15:10:08,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 15:10:08,193 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 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 30 [2021-05-03 15:10:08,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:10:08,197 INFO L225 Difference]: With dead ends: 2555 [2021-05-03 15:10:08,197 INFO L226 Difference]: Without dead ends: 2524 [2021-05-03 15:10:08,197 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 5885.9ms TimeCoverageRelationStatistics Valid=406, Invalid=1400, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 15:10:08,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2524 states. [2021-05-03 15:10:08,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2524 to 997. [2021-05-03 15:10:08,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 996 states have (on average 2.38855421686747) internal successors, (2379), 996 states have internal predecessors, (2379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:08,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 2379 transitions. [2021-05-03 15:10:08,219 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 2379 transitions. Word has length 30 [2021-05-03 15:10:08,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:10:08,219 INFO L480 AbstractCegarLoop]: Abstraction has 997 states and 2379 transitions. [2021-05-03 15:10:08,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 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) [2021-05-03 15:10:08,219 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 2379 transitions. [2021-05-03 15:10:08,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:10:08,237 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:10:08,237 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:10:08,452 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:08,453 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:10:08,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:10:08,453 INFO L82 PathProgramCache]: Analyzing trace with hash -627290201, now seen corresponding path program 8 times [2021-05-03 15:10:08,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:10:08,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845569236] [2021-05-03 15:10:08,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:10:08,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:10:08,651 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2021-05-03 15:10:09,520 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:09,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845569236] [2021-05-03 15:10:09,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98958488] [2021-05-03 15:10:09,520 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:09,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:10:09,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:10:09,541 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:10:09,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:10:10,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-05-03 15:10:10,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:10:10,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:10:10,287 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:10:10,288 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:11 [2021-05-03 15:10:10,396 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:10,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:10:10,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-05-03 15:10:10,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363216568] [2021-05-03 15:10:10,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 15:10:10,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:10:10,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 15:10:10,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:10:10,398 INFO L87 Difference]: Start difference. First operand 997 states and 2379 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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) [2021-05-03 15:10:11,950 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-05-03 15:10:12,487 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-03 15:10:14,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:10:14,595 INFO L93 Difference]: Finished difference Result 2336 states and 5690 transitions. [2021-05-03 15:10:14,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 15:10:14,598 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 30 [2021-05-03 15:10:14,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:10:14,600 INFO L225 Difference]: With dead ends: 2336 [2021-05-03 15:10:14,600 INFO L226 Difference]: Without dead ends: 2326 [2021-05-03 15:10:14,601 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 2724.7ms TimeCoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 15:10:14,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2326 states. [2021-05-03 15:10:14,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2326 to 997. [2021-05-03 15:10:14,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 996 states have (on average 2.38855421686747) internal successors, (2379), 996 states have internal predecessors, (2379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:14,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 2379 transitions. [2021-05-03 15:10:14,619 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 2379 transitions. Word has length 30 [2021-05-03 15:10:14,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:10:14,619 INFO L480 AbstractCegarLoop]: Abstraction has 997 states and 2379 transitions. [2021-05-03 15:10:14,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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) [2021-05-03 15:10:14,620 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 2379 transitions. [2021-05-03 15:10:14,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:10:14,621 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:10:14,621 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:10:14,837 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2021-05-03 15:10:14,838 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:10:14,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:10:14,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1787800249, now seen corresponding path program 9 times [2021-05-03 15:10:14,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:10:14,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077176717] [2021-05-03 15:10:14,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:10:14,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:10:15,337 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-05-03 15:10:15,488 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-05-03 15:10:15,670 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-05-03 15:10:15,915 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:15,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077176717] [2021-05-03 15:10:15,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634775230] [2021-05-03 15:10:15,915 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:15,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 15:10:15,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:10:15,962 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 15:10:15,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:10:16,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 15:10:16,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:10:16,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:10:16,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:10:16,746 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-05-03 15:10:16,836 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:16,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:10:16,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-05-03 15:10:16,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863742508] [2021-05-03 15:10:16,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 15:10:16,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:10:16,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 15:10:16,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:10:16,837 INFO L87 Difference]: Start difference. First operand 997 states and 2379 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 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) [2021-05-03 15:10:17,234 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-05-03 15:10:17,583 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-05-03 15:10:18,127 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-05-03 15:10:18,567 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-05-03 15:10:18,789 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-05-03 15:10:19,119 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-05-03 15:10:19,320 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-05-03 15:10:19,684 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-05-03 15:10:20,577 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-05-03 15:10:23,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:10:23,152 INFO L93 Difference]: Finished difference Result 2310 states and 5663 transitions. [2021-05-03 15:10:23,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 15:10:23,153 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 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 30 [2021-05-03 15:10:23,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:10:23,156 INFO L225 Difference]: With dead ends: 2310 [2021-05-03 15:10:23,156 INFO L226 Difference]: Without dead ends: 2301 [2021-05-03 15:10:23,156 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 4320.0ms TimeCoverageRelationStatistics Valid=258, Invalid=1464, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 15:10:23,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2021-05-03 15:10:23,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 1021. [2021-05-03 15:10:23,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 1020 states have (on average 2.3931372549019607) internal successors, (2441), 1020 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:23,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 2441 transitions. [2021-05-03 15:10:23,175 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 2441 transitions. Word has length 30 [2021-05-03 15:10:23,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:10:23,175 INFO L480 AbstractCegarLoop]: Abstraction has 1021 states and 2441 transitions. [2021-05-03 15:10:23,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 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) [2021-05-03 15:10:23,175 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 2441 transitions. [2021-05-03 15:10:23,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:10:23,176 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:10:23,176 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:10:23,378 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-05-03 15:10:23,378 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:10:23,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:10:23,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1608282809, now seen corresponding path program 10 times [2021-05-03 15:10:23,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:10:23,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078677246] [2021-05-03 15:10:23,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:10:23,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:10:23,869 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-05-03 15:10:24,028 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-05-03 15:10:24,224 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-05-03 15:10:24,487 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:24,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078677246] [2021-05-03 15:10:24,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138492337] [2021-05-03 15:10:24,487 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:24,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:10:24,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:10:24,511 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:10:24,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:10:25,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-05-03 15:10:25,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:10:25,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:10:25,136 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:10:25,136 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:14 [2021-05-03 15:10:25,259 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:25,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:10:25,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-05-03 15:10:25,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6343755] [2021-05-03 15:10:25,260 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 15:10:25,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:10:25,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 15:10:25,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-05-03 15:10:25,260 INFO L87 Difference]: Start difference. First operand 1021 states and 2441 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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) [2021-05-03 15:10:25,422 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-05-03 15:10:25,654 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-05-03 15:10:25,960 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-05-03 15:10:26,480 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-05-03 15:10:26,876 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-05-03 15:10:27,116 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-05-03 15:10:27,433 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-05-03 15:10:27,960 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-05-03 15:10:28,709 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-05-03 15:10:29,034 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-05-03 15:10:30,016 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-05-03 15:10:31,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:10:31,130 INFO L93 Difference]: Finished difference Result 2339 states and 5743 transitions. [2021-05-03 15:10:31,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 15:10:31,133 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 30 [2021-05-03 15:10:31,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:10:31,136 INFO L225 Difference]: With dead ends: 2339 [2021-05-03 15:10:31,136 INFO L226 Difference]: Without dead ends: 2328 [2021-05-03 15:10:31,136 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 4415.7ms TimeCoverageRelationStatistics Valid=287, Invalid=1435, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 15:10:31,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-05-03 15:10:31,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 1030. [2021-05-03 15:10:31,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1030 states, 1029 states have (on average 2.3974732750242955) internal successors, (2467), 1029 states have internal predecessors, (2467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:31,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1030 states to 1030 states and 2467 transitions. [2021-05-03 15:10:31,155 INFO L78 Accepts]: Start accepts. Automaton has 1030 states and 2467 transitions. Word has length 30 [2021-05-03 15:10:31,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:10:31,156 INFO L480 AbstractCegarLoop]: Abstraction has 1030 states and 2467 transitions. [2021-05-03 15:10:31,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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) [2021-05-03 15:10:31,156 INFO L276 IsEmpty]: Start isEmpty. Operand 1030 states and 2467 transitions. [2021-05-03 15:10:31,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:10:31,157 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:10:31,157 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:10:31,357 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-05-03 15:10:31,358 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:10:31,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:10:31,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1743084217, now seen corresponding path program 11 times [2021-05-03 15:10:31,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:10:31,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60084305] [2021-05-03 15:10:31,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:10:31,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:10:31,849 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-05-03 15:10:31,990 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-05-03 15:10:32,171 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-05-03 15:10:32,414 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:32,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60084305] [2021-05-03 15:10:32,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765842932] [2021-05-03 15:10:32,415 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:32,434 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 15:10:32,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:10:32,435 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:10:32,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:10:32,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-05-03 15:10:32,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:10:32,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:10:32,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:10:32,973 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:14 [2021-05-03 15:10:33,081 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:33,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:10:33,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-05-03 15:10:33,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017019489] [2021-05-03 15:10:33,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 15:10:33,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:10:33,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 15:10:33,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-05-03 15:10:33,082 INFO L87 Difference]: Start difference. First operand 1030 states and 2467 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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) [2021-05-03 15:10:33,497 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-05-03 15:10:33,870 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-05-03 15:10:34,442 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-05-03 15:10:34,801 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-05-03 15:10:35,037 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-05-03 15:10:35,346 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-05-03 15:10:35,974 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-05-03 15:10:36,820 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-05-03 15:10:37,226 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-05-03 15:10:37,836 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-05-03 15:10:38,146 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-05-03 15:10:38,961 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-05-03 15:10:40,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:10:40,093 INFO L93 Difference]: Finished difference Result 2424 states and 5962 transitions. [2021-05-03 15:10:40,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-03 15:10:40,096 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 30 [2021-05-03 15:10:40,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:10:40,099 INFO L225 Difference]: With dead ends: 2424 [2021-05-03 15:10:40,099 INFO L226 Difference]: Without dead ends: 2404 [2021-05-03 15:10:40,099 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 4728.0ms TimeCoverageRelationStatistics Valid=312, Invalid=1580, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 15:10:40,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2021-05-03 15:10:40,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 1012. [2021-05-03 15:10:40,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1012 states, 1011 states have (on average 2.390702274975272) internal successors, (2417), 1011 states have internal predecessors, (2417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:40,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1012 states to 1012 states and 2417 transitions. [2021-05-03 15:10:40,118 INFO L78 Accepts]: Start accepts. Automaton has 1012 states and 2417 transitions. Word has length 30 [2021-05-03 15:10:40,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:10:40,118 INFO L480 AbstractCegarLoop]: Abstraction has 1012 states and 2417 transitions. [2021-05-03 15:10:40,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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) [2021-05-03 15:10:40,118 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states and 2417 transitions. [2021-05-03 15:10:40,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:10:40,119 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:10:40,119 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:10:40,320 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-05-03 15:10:40,320 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:10:40,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:10:40,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1320754679, now seen corresponding path program 12 times [2021-05-03 15:10:40,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:10:40,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084434853] [2021-05-03 15:10:40,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:10:40,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:10:40,786 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-05-03 15:10:40,937 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-05-03 15:10:41,103 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-05-03 15:10:41,458 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:41,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084434853] [2021-05-03 15:10:41,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959636428] [2021-05-03 15:10:41,459 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:41,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 15:10:41,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:10:41,478 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 15:10:41,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:10:42,220 INFO L354 Elim1Store]: treesize reduction 29, result has 40.8 percent of original size [2021-05-03 15:10:42,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 64 [2021-05-03 15:10:42,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:10:42,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:10:42,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:10:42,284 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:80, output treesize:34 [2021-05-03 15:10:42,640 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:42,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:10:42,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2021-05-03 15:10:42,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669667289] [2021-05-03 15:10:42,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 15:10:42,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:10:42,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 15:10:42,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2021-05-03 15:10:42,641 INFO L87 Difference]: Start difference. First operand 1012 states and 2417 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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) [2021-05-03 15:10:42,976 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2021-05-03 15:10:43,185 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-05-03 15:10:43,378 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-05-03 15:10:43,678 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-05-03 15:10:43,952 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 [2021-05-03 15:10:44,350 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-05-03 15:10:44,642 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-05-03 15:10:44,936 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-05-03 15:10:45,420 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-05-03 15:10:46,310 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2021-05-03 15:10:46,877 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-05-03 15:10:47,381 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-05-03 15:10:47,768 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2021-05-03 15:10:48,197 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-05-03 15:10:48,655 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-05-03 15:10:48,857 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-05-03 15:10:49,175 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2021-05-03 15:10:49,546 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-05-03 15:10:49,999 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-05-03 15:10:50,474 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-05-03 15:10:50,909 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-05-03 15:10:51,201 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-05-03 15:10:51,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:10:51,902 INFO L93 Difference]: Finished difference Result 2369 states and 5806 transitions. [2021-05-03 15:10:51,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-03 15:10:51,905 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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 30 [2021-05-03 15:10:51,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:10:51,908 INFO L225 Difference]: With dead ends: 2369 [2021-05-03 15:10:51,908 INFO L226 Difference]: Without dead ends: 2358 [2021-05-03 15:10:51,909 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 864 ImplicationChecksByTransitivity, 7665.3ms TimeCoverageRelationStatistics Valid=494, Invalid=2368, Unknown=0, NotChecked=0, Total=2862 [2021-05-03 15:10:51,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2358 states. [2021-05-03 15:10:51,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2358 to 1034. [2021-05-03 15:10:51,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 1033 states have (on average 2.397870280735721) internal successors, (2477), 1033 states have internal predecessors, (2477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:51,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 2477 transitions. [2021-05-03 15:10:51,927 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 2477 transitions. Word has length 30 [2021-05-03 15:10:51,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:10:51,927 INFO L480 AbstractCegarLoop]: Abstraction has 1034 states and 2477 transitions. [2021-05-03 15:10:51,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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) [2021-05-03 15:10:51,927 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 2477 transitions. [2021-05-03 15:10:51,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:10:51,928 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:10:51,928 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:10:52,130 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2021-05-03 15:10:52,130 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:10:52,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:10:52,130 INFO L82 PathProgramCache]: Analyzing trace with hash 435646371, now seen corresponding path program 13 times [2021-05-03 15:10:52,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:10:52,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106623596] [2021-05-03 15:10:52,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:10:52,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:10:52,620 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-05-03 15:10:52,763 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-05-03 15:10:52,914 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-05-03 15:10:53,262 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:53,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106623596] [2021-05-03 15:10:53,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660567703] [2021-05-03 15:10:53,263 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:53,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:10:53,282 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:10:53,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:10:53,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-05-03 15:10:53,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:10:53,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:10:53,837 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:10:53,838 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:14 [2021-05-03 15:10:53,891 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:53,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:10:53,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-05-03 15:10:53,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586738173] [2021-05-03 15:10:53,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 15:10:53,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:10:53,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 15:10:53,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:10:53,892 INFO L87 Difference]: Start difference. First operand 1034 states and 2477 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) [2021-05-03 15:10:54,358 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-05-03 15:10:54,583 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-05-03 15:10:54,856 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-05-03 15:10:55,349 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-05-03 15:10:55,639 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-05-03 15:10:55,939 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-05-03 15:10:56,333 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2021-05-03 15:10:56,571 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-05-03 15:10:56,873 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-05-03 15:10:57,422 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2021-05-03 15:10:58,422 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-05-03 15:10:58,820 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-05-03 15:10:59,167 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-05-03 15:10:59,784 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-05-03 15:10:59,964 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-05-03 15:11:00,729 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-05-03 15:11:01,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:01,371 INFO L93 Difference]: Finished difference Result 2683 states and 6603 transitions. [2021-05-03 15:11:01,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-03 15:11:01,374 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 30 [2021-05-03 15:11:01,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:01,377 INFO L225 Difference]: With dead ends: 2683 [2021-05-03 15:11:01,378 INFO L226 Difference]: Without dead ends: 2663 [2021-05-03 15:11:01,378 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 5759.0ms TimeCoverageRelationStatistics Valid=432, Invalid=1920, Unknown=0, NotChecked=0, Total=2352 [2021-05-03 15:11:01,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2663 states. [2021-05-03 15:11:01,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2663 to 1037. [2021-05-03 15:11:01,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1037 states, 1036 states have (on average 2.3957528957528957) internal successors, (2482), 1036 states have internal predecessors, (2482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:01,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 2482 transitions. [2021-05-03 15:11:01,401 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 2482 transitions. Word has length 30 [2021-05-03 15:11:01,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:01,401 INFO L480 AbstractCegarLoop]: Abstraction has 1037 states and 2482 transitions. [2021-05-03 15:11:01,402 INFO L481 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) [2021-05-03 15:11:01,402 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 2482 transitions. [2021-05-03 15:11:01,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:11:01,403 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:01,403 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:01,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:01,603 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:11:01,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:01,604 INFO L82 PathProgramCache]: Analyzing trace with hash 971090579, now seen corresponding path program 14 times [2021-05-03 15:11:01,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:01,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072023314] [2021-05-03 15:11:01,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:01,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:02,068 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-05-03 15:11:02,217 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-05-03 15:11:02,373 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-05-03 15:11:02,720 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:02,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072023314] [2021-05-03 15:11:02,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185986955] [2021-05-03 15:11:02,721 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:02,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:11:02,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:02,740 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 15:11:02,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:03,662 INFO L354 Elim1Store]: treesize reduction 29, result has 40.8 percent of original size [2021-05-03 15:11:03,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 64 [2021-05-03 15:11:03,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:11:03,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:03,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:03,729 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:77, output treesize:31 [2021-05-03 15:11:04,042 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2021-05-03 15:11:04,159 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:04,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:04,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 24 [2021-05-03 15:11:04,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607271906] [2021-05-03 15:11:04,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 15:11:04,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:04,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 15:11:04,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2021-05-03 15:11:04,160 INFO L87 Difference]: Start difference. First operand 1037 states and 2482 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 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) [2021-05-03 15:11:05,325 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2021-05-03 15:11:05,721 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2021-05-03 15:11:06,034 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-05-03 15:11:06,792 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-05-03 15:11:07,525 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 15:11:08,280 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-05-03 15:11:08,655 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36 [2021-05-03 15:11:09,155 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-05-03 15:11:09,496 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-05-03 15:11:09,877 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2021-05-03 15:11:10,662 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-05-03 15:11:11,552 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2021-05-03 15:11:11,793 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-05-03 15:11:12,570 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-05-03 15:11:12,752 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-05-03 15:11:13,122 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-05-03 15:11:13,326 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-05-03 15:11:13,697 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2021-05-03 15:11:14,166 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-05-03 15:11:14,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:14,714 INFO L93 Difference]: Finished difference Result 2624 states and 6383 transitions. [2021-05-03 15:11:14,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-03 15:11:14,718 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 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 30 [2021-05-03 15:11:14,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:14,721 INFO L225 Difference]: With dead ends: 2624 [2021-05-03 15:11:14,721 INFO L226 Difference]: Without dead ends: 2604 [2021-05-03 15:11:14,721 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1151 ImplicationChecksByTransitivity, 8929.2ms TimeCoverageRelationStatistics Valid=672, Invalid=2988, Unknown=0, NotChecked=0, Total=3660 [2021-05-03 15:11:14,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2604 states. [2021-05-03 15:11:14,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2604 to 1034. [2021-05-03 15:11:14,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 1033 states have (on average 2.3969022265246855) internal successors, (2476), 1033 states have internal predecessors, (2476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:14,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 2476 transitions. [2021-05-03 15:11:14,740 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 2476 transitions. Word has length 30 [2021-05-03 15:11:14,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:14,740 INFO L480 AbstractCegarLoop]: Abstraction has 1034 states and 2476 transitions. [2021-05-03 15:11:14,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 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) [2021-05-03 15:11:14,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 2476 transitions. [2021-05-03 15:11:14,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:11:14,741 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:14,741 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:14,942 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-05-03 15:11:14,942 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:11:14,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:14,942 INFO L82 PathProgramCache]: Analyzing trace with hash -292888029, now seen corresponding path program 15 times [2021-05-03 15:11:14,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:14,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118893809] [2021-05-03 15:11:14,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:14,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:15,422 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-05-03 15:11:15,797 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:15,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118893809] [2021-05-03 15:11:15,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917422652] [2021-05-03 15:11:15,797 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:15,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 15:11:15,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:15,817 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 15:11:15,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:16,752 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:16,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-05-03 15:11:16,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:11:16,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:16,857 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:16,857 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:95 [2021-05-03 15:11:17,213 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-05-03 15:11:17,919 WARN L205 SmtUtils]: Spent 596.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2021-05-03 15:11:18,080 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:18,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:18,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-05-03 15:11:18,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348057082] [2021-05-03 15:11:18,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 15:11:18,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:18,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 15:11:18,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-05-03 15:11:18,081 INFO L87 Difference]: Start difference. First operand 1034 states and 2476 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) 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) [2021-05-03 15:11:18,825 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-05-03 15:11:19,142 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2021-05-03 15:11:19,358 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 22 [2021-05-03 15:11:19,813 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 [2021-05-03 15:11:20,512 WARN L205 SmtUtils]: Spent 603.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2021-05-03 15:11:20,839 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2021-05-03 15:11:21,137 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2021-05-03 15:11:21,851 WARN L205 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-05-03 15:11:22,137 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-05-03 15:11:22,389 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-05-03 15:11:23,665 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 29 [2021-05-03 15:11:25,029 WARN L205 SmtUtils]: Spent 981.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-05-03 15:11:25,512 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 41 [2021-05-03 15:11:26,969 WARN L205 SmtUtils]: Spent 833.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-05-03 15:11:27,740 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-05-03 15:11:28,241 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-05-03 15:11:28,700 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-03 15:11:29,227 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-05-03 15:11:29,440 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-05-03 15:11:29,938 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-05-03 15:11:30,192 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2021-05-03 15:11:30,574 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2021-05-03 15:11:31,026 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-05-03 15:11:31,396 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 35 [2021-05-03 15:11:31,990 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 22 [2021-05-03 15:11:32,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:32,185 INFO L93 Difference]: Finished difference Result 2428 states and 5917 transitions. [2021-05-03 15:11:32,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-03 15:11:32,188 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) 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 30 [2021-05-03 15:11:32,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:32,191 INFO L225 Difference]: With dead ends: 2428 [2021-05-03 15:11:32,191 INFO L226 Difference]: Without dead ends: 2417 [2021-05-03 15:11:32,191 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 11524.2ms TimeCoverageRelationStatistics Valid=562, Invalid=3098, Unknown=0, NotChecked=0, Total=3660 [2021-05-03 15:11:32,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2021-05-03 15:11:32,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 1055. [2021-05-03 15:11:32,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1055 states, 1054 states have (on average 2.4022770398481974) internal successors, (2532), 1054 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:32,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 2532 transitions. [2021-05-03 15:11:32,208 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 2532 transitions. Word has length 30 [2021-05-03 15:11:32,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:32,208 INFO L480 AbstractCegarLoop]: Abstraction has 1055 states and 2532 transitions. [2021-05-03 15:11:32,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8461538461538463) 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) [2021-05-03 15:11:32,208 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 2532 transitions. [2021-05-03 15:11:32,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:11:32,210 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:32,210 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:32,410 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:32,410 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:11:32,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:32,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1463513021, now seen corresponding path program 16 times [2021-05-03 15:11:32,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:32,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167416826] [2021-05-03 15:11:32,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:32,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:32,897 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-05-03 15:11:33,070 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-05-03 15:11:33,502 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:33,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167416826] [2021-05-03 15:11:33,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029552968] [2021-05-03 15:11:33,502 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:33,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:11:33,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:33,521 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:11:33,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:34,164 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-05-03 15:11:34,164 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 44 [2021-05-03 15:11:34,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:11:34,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:34,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:34,187 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:14 [2021-05-03 15:11:34,310 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:34,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:34,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-05-03 15:11:34,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123121174] [2021-05-03 15:11:34,311 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 15:11:34,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:34,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 15:11:34,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:11:34,311 INFO L87 Difference]: Start difference. First operand 1055 states and 2532 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) [2021-05-03 15:11:34,784 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-05-03 15:11:35,017 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-05-03 15:11:35,473 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2021-05-03 15:11:35,771 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2021-05-03 15:11:36,074 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-05-03 15:11:36,407 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-05-03 15:11:36,647 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-05-03 15:11:36,908 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-05-03 15:11:38,068 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-05-03 15:11:38,443 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2021-05-03 15:11:38,814 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-05-03 15:11:39,469 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-05-03 15:11:39,672 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-05-03 15:11:39,908 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2021-05-03 15:11:40,217 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 22 [2021-05-03 15:11:41,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:41,015 INFO L93 Difference]: Finished difference Result 2785 states and 6863 transitions. [2021-05-03 15:11:41,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-03 15:11:41,019 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 30 [2021-05-03 15:11:41,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:41,022 INFO L225 Difference]: With dead ends: 2785 [2021-05-03 15:11:41,022 INFO L226 Difference]: Without dead ends: 2765 [2021-05-03 15:11:41,023 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 5478.0ms TimeCoverageRelationStatistics Valid=375, Invalid=1605, Unknown=0, NotChecked=0, Total=1980 [2021-05-03 15:11:41,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2765 states. [2021-05-03 15:11:41,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2765 to 1055. [2021-05-03 15:11:41,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1055 states, 1054 states have (on average 2.398481973434535) internal successors, (2528), 1054 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:41,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 2528 transitions. [2021-05-03 15:11:41,045 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 2528 transitions. Word has length 30 [2021-05-03 15:11:41,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:41,045 INFO L480 AbstractCegarLoop]: Abstraction has 1055 states and 2528 transitions. [2021-05-03 15:11:41,045 INFO L481 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) [2021-05-03 15:11:41,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 2528 transitions. [2021-05-03 15:11:41,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:11:41,046 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:41,046 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:41,247 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-05-03 15:11:41,247 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:11:41,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:41,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1998957229, now seen corresponding path program 17 times [2021-05-03 15:11:41,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:41,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56626017] [2021-05-03 15:11:41,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:41,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:41,727 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-05-03 15:11:41,908 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-05-03 15:11:42,324 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:42,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56626017] [2021-05-03 15:11:42,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302556188] [2021-05-03 15:11:42,325 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:42,342 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 15:11:42,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:42,343 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:11:42,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:43,112 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-05-03 15:11:43,112 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 44 [2021-05-03 15:11:43,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:11:43,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:43,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:43,131 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:11 [2021-05-03 15:11:43,253 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:43,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:43,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-05-03 15:11:43,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809594269] [2021-05-03 15:11:43,253 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 15:11:43,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:43,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 15:11:43,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:11:43,254 INFO L87 Difference]: Start difference. First operand 1055 states and 2528 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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) [2021-05-03 15:11:44,232 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2021-05-03 15:11:44,576 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-05-03 15:11:44,897 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-05-03 15:11:45,213 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-05-03 15:11:45,464 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-05-03 15:11:46,990 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2021-05-03 15:11:47,391 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2021-05-03 15:11:47,932 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-05-03 15:11:48,272 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-05-03 15:11:48,923 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-05-03 15:11:49,505 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-05-03 15:11:50,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:50,625 INFO L93 Difference]: Finished difference Result 2362 states and 5759 transitions. [2021-05-03 15:11:50,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 15:11:50,628 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 30 [2021-05-03 15:11:50,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:50,631 INFO L225 Difference]: With dead ends: 2362 [2021-05-03 15:11:50,631 INFO L226 Difference]: Without dead ends: 2342 [2021-05-03 15:11:50,631 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 5590.7ms TimeCoverageRelationStatistics Valid=380, Invalid=1600, Unknown=0, NotChecked=0, Total=1980 [2021-05-03 15:11:50,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2342 states. [2021-05-03 15:11:50,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2342 to 1055. [2021-05-03 15:11:50,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1055 states, 1054 states have (on average 2.3975332068311195) internal successors, (2527), 1054 states have internal predecessors, (2527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:50,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 2527 transitions. [2021-05-03 15:11:50,649 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 2527 transitions. Word has length 30 [2021-05-03 15:11:50,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:50,649 INFO L480 AbstractCegarLoop]: Abstraction has 1055 states and 2527 transitions. [2021-05-03 15:11:50,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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) [2021-05-03 15:11:50,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 2527 transitions. [2021-05-03 15:11:50,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:11:50,650 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:50,650 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:50,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-05-03 15:11:50,851 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:11:50,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:50,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1891263929, now seen corresponding path program 18 times [2021-05-03 15:11:50,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:50,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175852582] [2021-05-03 15:11:50,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:50,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:51,379 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-05-03 15:11:51,551 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-05-03 15:11:51,987 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:51,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175852582] [2021-05-03 15:11:51,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607423842] [2021-05-03 15:11:51,987 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:52,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 15:11:52,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:52,006 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:11:52,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:52,800 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-05-03 15:11:52,801 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 44 [2021-05-03 15:11:52,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:11:52,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:52,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:52,819 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:11 [2021-05-03 15:11:52,935 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:52,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:52,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-05-03 15:11:52,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643752086] [2021-05-03 15:11:52,936 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 15:11:52,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:52,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 15:11:52,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:11:52,937 INFO L87 Difference]: Start difference. First operand 1055 states and 2527 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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) [2021-05-03 15:11:54,032 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 35 [2021-05-03 15:11:54,381 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2021-05-03 15:11:54,695 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-05-03 15:11:55,039 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-05-03 15:11:55,348 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-05-03 15:11:56,596 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-03 15:11:56,996 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2021-05-03 15:11:57,404 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 33 [2021-05-03 15:11:57,988 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-05-03 15:11:58,517 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2021-05-03 15:12:00,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:00,087 INFO L93 Difference]: Finished difference Result 2407 states and 5867 transitions. [2021-05-03 15:12:00,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 15:12:00,089 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 30 [2021-05-03 15:12:00,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:00,092 INFO L225 Difference]: With dead ends: 2407 [2021-05-03 15:12:00,092 INFO L226 Difference]: Without dead ends: 2370 [2021-05-03 15:12:00,092 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 5149.3ms TimeCoverageRelationStatistics Valid=351, Invalid=1455, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 15:12:00,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2370 states. [2021-05-03 15:12:00,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2370 to 1046. [2021-05-03 15:12:00,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 1045 states have (on average 2.3942583732057416) internal successors, (2502), 1045 states have internal predecessors, (2502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:00,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 2502 transitions. [2021-05-03 15:12:00,104 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 2502 transitions. Word has length 30 [2021-05-03 15:12:00,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:00,104 INFO L480 AbstractCegarLoop]: Abstraction has 1046 states and 2502 transitions. [2021-05-03 15:12:00,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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) [2021-05-03 15:12:00,104 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 2502 transitions. [2021-05-03 15:12:00,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:12:00,105 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:00,105 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:00,306 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:00,306 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:12:00,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:00,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1162356301, now seen corresponding path program 19 times [2021-05-03 15:12:00,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:00,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417990486] [2021-05-03 15:12:00,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:00,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:00,872 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:00,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417990486] [2021-05-03 15:12:00,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759922504] [2021-05-03 15:12:00,873 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:00,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:00,890 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:12:00,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:01,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-05-03 15:12:01,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:12:01,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:01,296 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:12:01,296 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:14 [2021-05-03 15:12:01,368 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:01,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:01,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-05-03 15:12:01,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639254565] [2021-05-03 15:12:01,369 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 15:12:01,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:01,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 15:12:01,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:12:01,369 INFO L87 Difference]: Start difference. First operand 1046 states and 2502 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) [2021-05-03 15:12:02,299 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-05-03 15:12:02,443 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-05-03 15:12:04,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:04,483 INFO L93 Difference]: Finished difference Result 2617 states and 6419 transitions. [2021-05-03 15:12:04,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 15:12:04,485 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 30 [2021-05-03 15:12:04,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:04,488 INFO L225 Difference]: With dead ends: 2617 [2021-05-03 15:12:04,488 INFO L226 Difference]: Without dead ends: 2606 [2021-05-03 15:12:04,488 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 2147.1ms TimeCoverageRelationStatistics Valid=244, Invalid=1088, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 15:12:04,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2606 states. [2021-05-03 15:12:04,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2606 to 1080. [2021-05-03 15:12:04,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 1079 states have (on average 2.4040778498609825) internal successors, (2594), 1079 states have internal predecessors, (2594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:04,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 2594 transitions. [2021-05-03 15:12:04,502 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 2594 transitions. Word has length 30 [2021-05-03 15:12:04,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:04,503 INFO L480 AbstractCegarLoop]: Abstraction has 1080 states and 2594 transitions. [2021-05-03 15:12:04,503 INFO L481 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) [2021-05-03 15:12:04,503 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 2594 transitions. [2021-05-03 15:12:04,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:12:04,504 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:04,504 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:04,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:04,704 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:12:04,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:04,704 INFO L82 PathProgramCache]: Analyzing trace with hash 594044749, now seen corresponding path program 20 times [2021-05-03 15:12:04,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:04,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781030546] [2021-05-03 15:12:04,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:04,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:05,278 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:05,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781030546] [2021-05-03 15:12:05,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412335208] [2021-05-03 15:12:05,278 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:05,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:12:05,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:05,296 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 15:12:05,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:05,814 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:05,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2021-05-03 15:12:05,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:12:05,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:05,860 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:12:05,861 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-05-03 15:12:06,129 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:06,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:06,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2021-05-03 15:12:06,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171463529] [2021-05-03 15:12:06,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 15:12:06,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:06,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 15:12:06,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=427, Unknown=0, NotChecked=0, Total=552 [2021-05-03 15:12:06,130 INFO L87 Difference]: Start difference. First operand 1080 states and 2594 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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) [2021-05-03 15:12:07,033 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-05-03 15:12:08,322 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-05-03 15:12:09,786 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-05-03 15:12:10,006 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2021-05-03 15:12:11,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:11,194 INFO L93 Difference]: Finished difference Result 2728 states and 6740 transitions. [2021-05-03 15:12:11,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 15:12:11,196 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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 30 [2021-05-03 15:12:11,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:11,199 INFO L225 Difference]: With dead ends: 2728 [2021-05-03 15:12:11,199 INFO L226 Difference]: Without dead ends: 2716 [2021-05-03 15:12:11,199 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 3186.6ms TimeCoverageRelationStatistics Valid=361, Invalid=1531, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 15:12:11,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2716 states. [2021-05-03 15:12:11,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2716 to 1115. [2021-05-03 15:12:11,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1115 states, 1114 states have (on average 2.4093357271095153) internal successors, (2684), 1114 states have internal predecessors, (2684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:11,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1115 states to 1115 states and 2684 transitions. [2021-05-03 15:12:11,213 INFO L78 Accepts]: Start accepts. Automaton has 1115 states and 2684 transitions. Word has length 30 [2021-05-03 15:12:11,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:11,213 INFO L480 AbstractCegarLoop]: Abstraction has 1115 states and 2684 transitions. [2021-05-03 15:12:11,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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) [2021-05-03 15:12:11,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states and 2684 transitions. [2021-05-03 15:12:11,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:12:11,214 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:11,214 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:11,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2021-05-03 15:12:11,429 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:12:11,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:11,429 INFO L82 PathProgramCache]: Analyzing trace with hash -323905441, now seen corresponding path program 21 times [2021-05-03 15:12:11,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:11,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641229930] [2021-05-03 15:12:11,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:11,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:12,036 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:12,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641229930] [2021-05-03 15:12:12,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195703124] [2021-05-03 15:12:12,036 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:12,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 15:12:12,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:12,054 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:12:12,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:12,492 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-05-03 15:12:12,492 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 44 [2021-05-03 15:12:12,495 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:12:12,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:12,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:12:12,507 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:14 [2021-05-03 15:12:12,627 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:12,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:12,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-05-03 15:12:12,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895533380] [2021-05-03 15:12:12,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 15:12:12,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:12,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 15:12:12,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:12:12,628 INFO L87 Difference]: Start difference. First operand 1115 states and 2684 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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) [2021-05-03 15:12:13,634 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-05-03 15:12:14,849 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-05-03 15:12:15,117 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-05-03 15:12:15,544 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-05-03 15:12:16,163 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-05-03 15:12:16,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:16,599 INFO L93 Difference]: Finished difference Result 3078 states and 7561 transitions. [2021-05-03 15:12:16,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-03 15:12:16,601 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 30 [2021-05-03 15:12:16,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:16,604 INFO L225 Difference]: With dead ends: 3078 [2021-05-03 15:12:16,604 INFO L226 Difference]: Without dead ends: 3056 [2021-05-03 15:12:16,604 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 3166.7ms TimeCoverageRelationStatistics Valid=424, Invalid=1738, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 15:12:16,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3056 states. [2021-05-03 15:12:16,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3056 to 1069. [2021-05-03 15:12:16,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 1068 states have (on average 2.397003745318352) internal successors, (2560), 1068 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:16,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 2560 transitions. [2021-05-03 15:12:16,620 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 2560 transitions. Word has length 30 [2021-05-03 15:12:16,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:16,621 INFO L480 AbstractCegarLoop]: Abstraction has 1069 states and 2560 transitions. [2021-05-03 15:12:16,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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) [2021-05-03 15:12:16,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 2560 transitions. [2021-05-03 15:12:16,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:12:16,622 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:16,622 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:16,822 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable288,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:16,822 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:12:16,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:16,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1129488957, now seen corresponding path program 22 times [2021-05-03 15:12:16,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:16,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993687937] [2021-05-03 15:12:16,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:16,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:17,435 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:17,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993687937] [2021-05-03 15:12:17,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79396193] [2021-05-03 15:12:17,435 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:17,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:12:17,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:17,457 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 15:12:17,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:18,041 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:18,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2021-05-03 15:12:18,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:12:18,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:18,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:12:18,090 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:31 [2021-05-03 15:12:18,335 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:18,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:18,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 24 [2021-05-03 15:12:18,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077533572] [2021-05-03 15:12:18,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 15:12:18,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:18,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 15:12:18,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-05-03 15:12:18,336 INFO L87 Difference]: Start difference. First operand 1069 states and 2560 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 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) [2021-05-03 15:12:18,842 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-05-03 15:12:19,044 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-05-03 15:12:19,672 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-05-03 15:12:19,939 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-05-03 15:12:20,113 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-05-03 15:12:20,488 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2021-05-03 15:12:21,374 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-05-03 15:12:21,812 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-05-03 15:12:22,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:22,886 INFO L93 Difference]: Finished difference Result 2640 states and 6425 transitions. [2021-05-03 15:12:22,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-03 15:12:22,888 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 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 30 [2021-05-03 15:12:22,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:22,891 INFO L225 Difference]: With dead ends: 2640 [2021-05-03 15:12:22,891 INFO L226 Difference]: Without dead ends: 2620 [2021-05-03 15:12:22,891 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 3769.1ms TimeCoverageRelationStatistics Valid=470, Invalid=1600, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 15:12:22,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2620 states. [2021-05-03 15:12:22,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2620 to 1087. [2021-05-03 15:12:22,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1086 states have (on average 2.3996316758747698) internal successors, (2606), 1086 states have internal predecessors, (2606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:22,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 2606 transitions. [2021-05-03 15:12:22,905 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 2606 transitions. Word has length 30 [2021-05-03 15:12:22,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:22,905 INFO L480 AbstractCegarLoop]: Abstraction has 1087 states and 2606 transitions. [2021-05-03 15:12:22,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 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) [2021-05-03 15:12:22,905 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 2606 transitions. [2021-05-03 15:12:22,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:12:22,906 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:22,906 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:23,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2021-05-03 15:12:23,106 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:12:23,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:23,107 INFO L82 PathProgramCache]: Analyzing trace with hash -508083499, now seen corresponding path program 23 times [2021-05-03 15:12:23,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:23,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531928471] [2021-05-03 15:12:23,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:23,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:23,678 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:23,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531928471] [2021-05-03 15:12:23,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301038685] [2021-05-03 15:12:23,679 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:23,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 15:12:23,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:23,696 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:12:23,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:24,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-05-03 15:12:24,103 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:12:24,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:24,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:12:24,112 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:11 [2021-05-03 15:12:24,174 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:24,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:24,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-05-03 15:12:24,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096982166] [2021-05-03 15:12:24,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 15:12:24,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:24,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 15:12:24,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:12:24,175 INFO L87 Difference]: Start difference. First operand 1087 states and 2606 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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) [2021-05-03 15:12:24,765 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-05-03 15:12:24,964 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-05-03 15:12:25,991 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-05-03 15:12:26,291 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2021-05-03 15:12:28,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:28,026 INFO L93 Difference]: Finished difference Result 2559 states and 6212 transitions. [2021-05-03 15:12:28,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 15:12:28,028 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 30 [2021-05-03 15:12:28,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:28,030 INFO L225 Difference]: With dead ends: 2559 [2021-05-03 15:12:28,030 INFO L226 Difference]: Without dead ends: 2522 [2021-05-03 15:12:28,031 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 2497.6ms TimeCoverageRelationStatistics Valid=286, Invalid=1120, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 15:12:28,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2522 states. [2021-05-03 15:12:28,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2522 to 1072. [2021-05-03 15:12:28,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 1071 states have (on average 2.3940242763772175) internal successors, (2564), 1071 states have internal predecessors, (2564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:28,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 2564 transitions. [2021-05-03 15:12:28,044 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 2564 transitions. Word has length 30 [2021-05-03 15:12:28,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:28,044 INFO L480 AbstractCegarLoop]: Abstraction has 1072 states and 2564 transitions. [2021-05-03 15:12:28,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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) [2021-05-03 15:12:28,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 2564 transitions. [2021-05-03 15:12:28,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:12:28,045 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:28,045 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:28,245 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:28,246 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:12:28,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:28,246 INFO L82 PathProgramCache]: Analyzing trace with hash -2141487853, now seen corresponding path program 24 times [2021-05-03 15:12:28,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:28,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308567514] [2021-05-03 15:12:28,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:28,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:28,863 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:28,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308567514] [2021-05-03 15:12:28,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424650476] [2021-05-03 15:12:28,863 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:28,881 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 15:12:28,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:28,882 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:12:28,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:29,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-05-03 15:12:29,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:12:29,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:29,382 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:12:29,382 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:11 [2021-05-03 15:12:29,457 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:29,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:29,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-05-03 15:12:29,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757931895] [2021-05-03 15:12:29,457 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 15:12:29,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:29,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 15:12:29,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:12:29,458 INFO L87 Difference]: Start difference. First operand 1072 states and 2564 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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) [2021-05-03 15:12:32,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:32,785 INFO L93 Difference]: Finished difference Result 2441 states and 5944 transitions. [2021-05-03 15:12:32,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 15:12:32,787 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 30 [2021-05-03 15:12:32,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:32,790 INFO L225 Difference]: With dead ends: 2441 [2021-05-03 15:12:32,790 INFO L226 Difference]: Without dead ends: 2431 [2021-05-03 15:12:32,790 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1939.9ms TimeCoverageRelationStatistics Valid=215, Invalid=907, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 15:12:32,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2431 states. [2021-05-03 15:12:32,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2431 to 1069. [2021-05-03 15:12:32,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 1068 states have (on average 2.394194756554307) internal successors, (2557), 1068 states have internal predecessors, (2557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:32,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 2557 transitions. [2021-05-03 15:12:32,807 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 2557 transitions. Word has length 30 [2021-05-03 15:12:32,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:32,808 INFO L480 AbstractCegarLoop]: Abstraction has 1069 states and 2557 transitions. [2021-05-03 15:12:32,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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) [2021-05-03 15:12:32,808 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 2557 transitions. [2021-05-03 15:12:32,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:12:32,809 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:32,809 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:33,010 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable296 [2021-05-03 15:12:33,010 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:12:33,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:33,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1543469255, now seen corresponding path program 1 times [2021-05-03 15:12:33,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:33,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409119708] [2021-05-03 15:12:33,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:33,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:33,703 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:33,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409119708] [2021-05-03 15:12:33,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000901562] [2021-05-03 15:12:33,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:33,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:33,722 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:12:33,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:34,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 15:12:34,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:12:34,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:34,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:12:34,213 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-05-03 15:12:34,277 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:34,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:34,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-05-03 15:12:34,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288706486] [2021-05-03 15:12:34,278 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 15:12:34,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:34,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 15:12:34,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:12:34,278 INFO L87 Difference]: Start difference. First operand 1069 states and 2557 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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) [2021-05-03 15:12:35,508 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-05-03 15:12:37,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:37,159 INFO L93 Difference]: Finished difference Result 2495 states and 6071 transitions. [2021-05-03 15:12:37,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 15:12:37,161 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 30 [2021-05-03 15:12:37,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:37,164 INFO L225 Difference]: With dead ends: 2495 [2021-05-03 15:12:37,164 INFO L226 Difference]: Without dead ends: 2485 [2021-05-03 15:12:37,164 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 2085.5ms TimeCoverageRelationStatistics Valid=201, Invalid=921, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 15:12:37,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2485 states. [2021-05-03 15:12:37,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2485 to 1113. [2021-05-03 15:12:37,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1113 states, 1112 states have (on average 2.3857913669064748) internal successors, (2653), 1112 states have internal predecessors, (2653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:37,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1113 states to 1113 states and 2653 transitions. [2021-05-03 15:12:37,178 INFO L78 Accepts]: Start accepts. Automaton has 1113 states and 2653 transitions. Word has length 30 [2021-05-03 15:12:37,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:37,178 INFO L480 AbstractCegarLoop]: Abstraction has 1113 states and 2653 transitions. [2021-05-03 15:12:37,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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) [2021-05-03 15:12:37,178 INFO L276 IsEmpty]: Start isEmpty. Operand 1113 states and 2653 transitions. [2021-05-03 15:12:37,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:12:37,179 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:37,179 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:37,384 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:37,385 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:12:37,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:37,385 INFO L82 PathProgramCache]: Analyzing trace with hash 334113745, now seen corresponding path program 2 times [2021-05-03 15:12:37,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:37,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191610614] [2021-05-03 15:12:37,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:37,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:38,094 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:38,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191610614] [2021-05-03 15:12:38,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701418283] [2021-05-03 15:12:38,095 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:38,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:12:38,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:38,114 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:12:38,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:38,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-05-03 15:12:38,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:12:38,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:38,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:12:38,533 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-05-03 15:12:38,612 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:38,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:38,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-05-03 15:12:38,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392392926] [2021-05-03 15:12:38,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 15:12:38,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:38,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 15:12:38,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:12:38,613 INFO L87 Difference]: Start difference. First operand 1113 states and 2653 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) [2021-05-03 15:12:42,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:42,143 INFO L93 Difference]: Finished difference Result 2679 states and 6535 transitions. [2021-05-03 15:12:42,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 15:12:42,145 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 30 [2021-05-03 15:12:42,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:42,148 INFO L225 Difference]: With dead ends: 2679 [2021-05-03 15:12:42,148 INFO L226 Difference]: Without dead ends: 2668 [2021-05-03 15:12:42,148 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 2276.4ms TimeCoverageRelationStatistics Valid=207, Invalid=1125, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 15:12:42,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2668 states. [2021-05-03 15:12:42,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2668 to 1142. [2021-05-03 15:12:42,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1141 states have (on average 2.3961437335670466) internal successors, (2734), 1141 states have internal predecessors, (2734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:42,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 2734 transitions. [2021-05-03 15:12:42,164 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 2734 transitions. Word has length 30 [2021-05-03 15:12:42,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:42,164 INFO L480 AbstractCegarLoop]: Abstraction has 1142 states and 2734 transitions. [2021-05-03 15:12:42,164 INFO L481 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) [2021-05-03 15:12:42,164 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 2734 transitions. [2021-05-03 15:12:42,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:12:42,165 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:42,165 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:42,365 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2021-05-03 15:12:42,365 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:12:42,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:42,366 INFO L82 PathProgramCache]: Analyzing trace with hash 2090514795, now seen corresponding path program 3 times [2021-05-03 15:12:42,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:42,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960094445] [2021-05-03 15:12:42,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:42,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:42,937 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:42,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960094445] [2021-05-03 15:12:42,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191588150] [2021-05-03 15:12:42,938 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:42,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 15:12:42,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:42,961 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-03 15:12:42,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:43,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:12:43,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:12:43,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-05-03 15:12:43,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:12:43,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:43,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:12:43,722 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:39, output treesize:14 [2021-05-03 15:12:43,800 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:43,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:43,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2021-05-03 15:12:43,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761313829] [2021-05-03 15:12:43,801 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 15:12:43,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:43,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 15:12:43,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-05-03 15:12:43,801 INFO L87 Difference]: Start difference. First operand 1142 states and 2734 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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) [2021-05-03 15:12:48,053 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-05-03 15:12:48,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:48,535 INFO L93 Difference]: Finished difference Result 2744 states and 6725 transitions. [2021-05-03 15:12:48,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 15:12:48,538 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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 30 [2021-05-03 15:12:48,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:48,541 INFO L225 Difference]: With dead ends: 2744 [2021-05-03 15:12:48,541 INFO L226 Difference]: Without dead ends: 2732 [2021-05-03 15:12:48,541 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 3282.5ms TimeCoverageRelationStatistics Valid=321, Invalid=1749, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 15:12:48,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2732 states. [2021-05-03 15:12:48,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2732 to 1147. [2021-05-03 15:12:48,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 2.391797556719023) internal successors, (2741), 1146 states have internal predecessors, (2741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:48,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 2741 transitions. [2021-05-03 15:12:48,557 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 2741 transitions. Word has length 30 [2021-05-03 15:12:48,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:48,557 INFO L480 AbstractCegarLoop]: Abstraction has 1147 states and 2741 transitions. [2021-05-03 15:12:48,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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) [2021-05-03 15:12:48,557 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 2741 transitions. [2021-05-03 15:12:48,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:12:48,558 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:48,558 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:48,773 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2021-05-03 15:12:48,773 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:12:48,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:48,773 INFO L82 PathProgramCache]: Analyzing trace with hash 519174883, now seen corresponding path program 4 times [2021-05-03 15:12:48,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:48,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024483658] [2021-05-03 15:12:48,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:48,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:49,382 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:49,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024483658] [2021-05-03 15:12:49,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045220287] [2021-05-03 15:12:49,383 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:49,399 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:12:49,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:49,400 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:12:49,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:49,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 15:12:49,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:12:49,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:49,862 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:12:49,862 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-05-03 15:12:49,927 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:49,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:49,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-05-03 15:12:49,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014094402] [2021-05-03 15:12:49,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 15:12:49,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:49,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 15:12:49,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:12:49,928 INFO L87 Difference]: Start difference. First operand 1147 states and 2741 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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) [2021-05-03 15:12:53,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:53,632 INFO L93 Difference]: Finished difference Result 2662 states and 6457 transitions. [2021-05-03 15:12:53,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 15:12:53,634 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 30 [2021-05-03 15:12:53,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:53,637 INFO L225 Difference]: With dead ends: 2662 [2021-05-03 15:12:53,637 INFO L226 Difference]: Without dead ends: 2640 [2021-05-03 15:12:53,637 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 2333.1ms TimeCoverageRelationStatistics Valid=274, Invalid=1058, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 15:12:53,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2640 states. [2021-05-03 15:12:53,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2640 to 1144. [2021-05-03 15:12:53,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1144 states, 1143 states have (on average 2.391076115485564) internal successors, (2733), 1143 states have internal predecessors, (2733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:53,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1144 states to 1144 states and 2733 transitions. [2021-05-03 15:12:53,652 INFO L78 Accepts]: Start accepts. Automaton has 1144 states and 2733 transitions. Word has length 30 [2021-05-03 15:12:53,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:53,652 INFO L480 AbstractCegarLoop]: Abstraction has 1144 states and 2733 transitions. [2021-05-03 15:12:53,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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) [2021-05-03 15:12:53,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1144 states and 2733 transitions. [2021-05-03 15:12:53,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:12:53,653 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:53,653 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:53,853 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-05-03 15:12:53,854 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:12:53,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:53,854 INFO L82 PathProgramCache]: Analyzing trace with hash -794070141, now seen corresponding path program 5 times [2021-05-03 15:12:53,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:53,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361466894] [2021-05-03 15:12:53,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:53,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:54,510 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:54,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361466894] [2021-05-03 15:12:54,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714406659] [2021-05-03 15:12:54,511 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:54,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 15:12:54,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:54,529 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:12:54,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:54,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 15:12:54,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:12:54,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:54,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:12:54,997 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-05-03 15:12:55,078 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:55,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:55,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-05-03 15:12:55,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724877960] [2021-05-03 15:12:55,079 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 15:12:55,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:55,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 15:12:55,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:12:55,079 INFO L87 Difference]: Start difference. First operand 1144 states and 2733 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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) [2021-05-03 15:12:58,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:58,530 INFO L93 Difference]: Finished difference Result 2481 states and 6044 transitions. [2021-05-03 15:12:58,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 15:12:58,532 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 30 [2021-05-03 15:12:58,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:58,535 INFO L225 Difference]: With dead ends: 2481 [2021-05-03 15:12:58,535 INFO L226 Difference]: Without dead ends: 2471 [2021-05-03 15:12:58,535 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 2056.2ms TimeCoverageRelationStatistics Valid=206, Invalid=916, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 15:12:58,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2021-05-03 15:12:58,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 1143. [2021-05-03 15:12:58,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1143 states, 1142 states have (on average 2.3914185639229424) internal successors, (2731), 1142 states have internal predecessors, (2731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:58,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1143 states to 1143 states and 2731 transitions. [2021-05-03 15:12:58,548 INFO L78 Accepts]: Start accepts. Automaton has 1143 states and 2731 transitions. Word has length 30 [2021-05-03 15:12:58,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:58,549 INFO L480 AbstractCegarLoop]: Abstraction has 1143 states and 2731 transitions. [2021-05-03 15:12:58,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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) [2021-05-03 15:12:58,549 INFO L276 IsEmpty]: Start isEmpty. Operand 1143 states and 2731 transitions. [2021-05-03 15:12:58,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:12:58,550 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:58,550 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:58,750 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable301,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:58,750 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:12:58,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:58,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1395219345, now seen corresponding path program 6 times [2021-05-03 15:12:58,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:58,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542899795] [2021-05-03 15:12:58,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:58,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:59,408 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:59,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542899795] [2021-05-03 15:12:59,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560453520] [2021-05-03 15:12:59,409 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:59,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 15:12:59,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:59,426 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 15:12:59,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:59,868 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:59,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-05-03 15:12:59,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:12:59,996 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-05-03 15:12:59,997 INFO L628 ElimStorePlain]: treesize reduction 8, result has 86.7 percent of original size [2021-05-03 15:12:59,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:13:00,000 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:52 [2021-05-03 15:13:00,362 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:00,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:13:00,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 24 [2021-05-03 15:13:00,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178791475] [2021-05-03 15:13:00,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 15:13:00,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:13:00,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 15:13:00,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2021-05-03 15:13:00,363 INFO L87 Difference]: Start difference. First operand 1143 states and 2731 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 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) [2021-05-03 15:13:01,175 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 31 [2021-05-03 15:13:02,221 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-05-03 15:13:02,678 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-05-03 15:13:03,053 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-05-03 15:13:03,654 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-05-03 15:13:03,895 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-05-03 15:13:04,602 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2021-05-03 15:13:05,457 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2021-05-03 15:13:05,886 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-05-03 15:13:06,077 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-05-03 15:13:06,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:13:06,321 INFO L93 Difference]: Finished difference Result 3296 states and 8051 transitions. [2021-05-03 15:13:06,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-03 15:13:06,323 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 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 30 [2021-05-03 15:13:06,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:13:06,327 INFO L225 Difference]: With dead ends: 3296 [2021-05-03 15:13:06,327 INFO L226 Difference]: Without dead ends: 3282 [2021-05-03 15:13:06,327 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 4764.6ms TimeCoverageRelationStatistics Valid=548, Invalid=2002, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 15:13:06,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3282 states. [2021-05-03 15:13:06,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3282 to 1136. [2021-05-03 15:13:06,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 2.388546255506608) internal successors, (2711), 1135 states have internal predecessors, (2711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:13:06,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 2711 transitions. [2021-05-03 15:13:06,342 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 2711 transitions. Word has length 30 [2021-05-03 15:13:06,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:13:06,342 INFO L480 AbstractCegarLoop]: Abstraction has 1136 states and 2711 transitions. [2021-05-03 15:13:06,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 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) [2021-05-03 15:13:06,343 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 2711 transitions. [2021-05-03 15:13:06,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:13:06,344 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:13:06,344 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:13:06,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable302,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:13:06,544 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:13:06,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:13:06,544 INFO L82 PathProgramCache]: Analyzing trace with hash 316882413, now seen corresponding path program 7 times [2021-05-03 15:13:06,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:13:06,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519457679] [2021-05-03 15:13:06,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:13:06,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:13:07,159 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:07,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519457679] [2021-05-03 15:13:07,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560204576] [2021-05-03 15:13:07,160 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:13:07,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:13:07,177 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:13:07,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:13:07,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-05-03 15:13:07,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:13:07,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:13:07,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:13:07,649 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-05-03 15:13:07,785 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:07,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:13:07,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-05-03 15:13:07,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635984838] [2021-05-03 15:13:07,785 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 15:13:07,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:13:07,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 15:13:07,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:13:07,786 INFO L87 Difference]: Start difference. First operand 1136 states and 2711 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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) [2021-05-03 15:13:08,460 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-05-03 15:13:10,383 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-05-03 15:13:11,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:13:11,688 INFO L93 Difference]: Finished difference Result 2703 states and 6567 transitions. [2021-05-03 15:13:11,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 15:13:11,690 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 30 [2021-05-03 15:13:11,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:13:11,693 INFO L225 Difference]: With dead ends: 2703 [2021-05-03 15:13:11,693 INFO L226 Difference]: Without dead ends: 2685 [2021-05-03 15:13:11,693 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 2377.4ms TimeCoverageRelationStatistics Valid=278, Invalid=1128, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 15:13:11,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2685 states. [2021-05-03 15:13:11,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2685 to 1113. [2021-05-03 15:13:11,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1113 states, 1112 states have (on average 2.3857913669064748) internal successors, (2653), 1112 states have internal predecessors, (2653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:13:11,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1113 states to 1113 states and 2653 transitions. [2021-05-03 15:13:11,708 INFO L78 Accepts]: Start accepts. Automaton has 1113 states and 2653 transitions. Word has length 30 [2021-05-03 15:13:11,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:13:11,708 INFO L480 AbstractCegarLoop]: Abstraction has 1113 states and 2653 transitions. [2021-05-03 15:13:11,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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) [2021-05-03 15:13:11,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1113 states and 2653 transitions. [2021-05-03 15:13:11,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:13:11,709 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:13:11,709 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:13:11,909 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable308 [2021-05-03 15:13:11,909 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:13:11,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:13:11,910 INFO L82 PathProgramCache]: Analyzing trace with hash -2074262811, now seen corresponding path program 8 times [2021-05-03 15:13:11,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:13:11,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701273020] [2021-05-03 15:13:11,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:13:11,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:13:12,512 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:12,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701273020] [2021-05-03 15:13:12,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844955115] [2021-05-03 15:13:12,512 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:13:12,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:13:12,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:13:12,529 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 15:13:12,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:13:13,006 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:13:13,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-05-03 15:13:13,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:13:13,134 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-05-03 15:13:13,135 INFO L628 ElimStorePlain]: treesize reduction 10, result has 84.8 percent of original size [2021-05-03 15:13:13,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:13:13,137 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:56 [2021-05-03 15:13:13,432 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:13,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:13:13,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2021-05-03 15:13:13,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675618263] [2021-05-03 15:13:13,433 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 15:13:13,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:13:13,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 15:13:13,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-05-03 15:13:13,433 INFO L87 Difference]: Start difference. First operand 1113 states and 2653 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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) [2021-05-03 15:13:14,677 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2021-05-03 15:13:15,117 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-05-03 15:13:15,294 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 28 [2021-05-03 15:13:15,982 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-05-03 15:13:17,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:13:17,262 INFO L93 Difference]: Finished difference Result 2536 states and 6200 transitions. [2021-05-03 15:13:17,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 15:13:17,264 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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 30 [2021-05-03 15:13:17,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:13:17,267 INFO L225 Difference]: With dead ends: 2536 [2021-05-03 15:13:17,267 INFO L226 Difference]: Without dead ends: 2525 [2021-05-03 15:13:17,267 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 2977.3ms TimeCoverageRelationStatistics Valid=286, Invalid=1274, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 15:13:17,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2525 states. [2021-05-03 15:13:17,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2525 to 1143. [2021-05-03 15:13:17,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1143 states, 1142 states have (on average 2.3957968476357268) internal successors, (2736), 1142 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:13:17,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1143 states to 1143 states and 2736 transitions. [2021-05-03 15:13:17,281 INFO L78 Accepts]: Start accepts. Automaton has 1143 states and 2736 transitions. Word has length 30 [2021-05-03 15:13:17,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:13:17,281 INFO L480 AbstractCegarLoop]: Abstraction has 1143 states and 2736 transitions. [2021-05-03 15:13:17,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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) [2021-05-03 15:13:17,281 INFO L276 IsEmpty]: Start isEmpty. Operand 1143 states and 2736 transitions. [2021-05-03 15:13:17,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:13:17,282 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:13:17,282 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:13:17,482 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable309 [2021-05-03 15:13:17,482 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:13:17,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:13:17,483 INFO L82 PathProgramCache]: Analyzing trace with hash -317861761, now seen corresponding path program 9 times [2021-05-03 15:13:17,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:13:17,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219958139] [2021-05-03 15:13:17,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:13:17,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:13:18,068 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:18,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219958139] [2021-05-03 15:13:18,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280554042] [2021-05-03 15:13:18,069 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:13:18,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 15:13:18,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:13:18,086 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:13:18,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:13:18,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-05-03 15:13:18,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:13:18,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:13:18,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:13:18,526 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-05-03 15:13:18,610 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:18,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:13:18,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-05-03 15:13:18,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458192034] [2021-05-03 15:13:18,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 15:13:18,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:13:18,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 15:13:18,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:13:18,611 INFO L87 Difference]: Start difference. First operand 1143 states and 2736 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) [2021-05-03 15:13:22,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:13:22,277 INFO L93 Difference]: Finished difference Result 2860 states and 7020 transitions. [2021-05-03 15:13:22,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 15:13:22,280 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 30 [2021-05-03 15:13:22,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:13:22,283 INFO L225 Difference]: With dead ends: 2860 [2021-05-03 15:13:22,283 INFO L226 Difference]: Without dead ends: 2840 [2021-05-03 15:13:22,283 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 2606.3ms TimeCoverageRelationStatistics Valid=295, Invalid=1265, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 15:13:22,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2021-05-03 15:13:22,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 1132. [2021-05-03 15:13:22,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1132 states, 1131 states have (on average 2.3890362511052166) internal successors, (2702), 1131 states have internal predecessors, (2702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:13:22,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1132 states to 1132 states and 2702 transitions. [2021-05-03 15:13:22,305 INFO L78 Accepts]: Start accepts. Automaton has 1132 states and 2702 transitions. Word has length 30 [2021-05-03 15:13:22,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:13:22,305 INFO L480 AbstractCegarLoop]: Abstraction has 1132 states and 2702 transitions. [2021-05-03 15:13:22,306 INFO L481 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) [2021-05-03 15:13:22,306 INFO L276 IsEmpty]: Start isEmpty. Operand 1132 states and 2702 transitions. [2021-05-03 15:13:22,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:13:22,306 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:13:22,306 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:13:22,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable315,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:13:22,507 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:13:22,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:13:22,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1889201673, now seen corresponding path program 10 times [2021-05-03 15:13:22,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:13:22,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233349545] [2021-05-03 15:13:22,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:13:22,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:13:23,226 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:23,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233349545] [2021-05-03 15:13:23,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460647796] [2021-05-03 15:13:23,227 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:13:23,243 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:13:23,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:13:23,244 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:13:23,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:13:23,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 15:13:23,747 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:13:23,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:13:23,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:13:23,760 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-05-03 15:13:23,839 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:23,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:13:23,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-05-03 15:13:23,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435657950] [2021-05-03 15:13:23,840 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 15:13:23,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:13:23,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 15:13:23,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:13:23,840 INFO L87 Difference]: Start difference. First operand 1132 states and 2702 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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) [2021-05-03 15:13:24,746 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-05-03 15:13:25,174 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-05-03 15:13:27,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:13:27,207 INFO L93 Difference]: Finished difference Result 2611 states and 6343 transitions. [2021-05-03 15:13:27,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 15:13:27,210 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 30 [2021-05-03 15:13:27,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:13:27,213 INFO L225 Difference]: With dead ends: 2611 [2021-05-03 15:13:27,213 INFO L226 Difference]: Without dead ends: 2588 [2021-05-03 15:13:27,213 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 2715.1ms TimeCoverageRelationStatistics Valid=310, Invalid=1096, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 15:13:27,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2588 states. [2021-05-03 15:13:27,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2588 to 1117. [2021-05-03 15:13:27,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1117 states, 1116 states have (on average 2.3853046594982077) internal successors, (2662), 1116 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:13:27,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1117 states to 1117 states and 2662 transitions. [2021-05-03 15:13:27,227 INFO L78 Accepts]: Start accepts. Automaton has 1117 states and 2662 transitions. Word has length 30 [2021-05-03 15:13:27,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:13:27,227 INFO L480 AbstractCegarLoop]: Abstraction has 1117 states and 2662 transitions. [2021-05-03 15:13:27,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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) [2021-05-03 15:13:27,227 INFO L276 IsEmpty]: Start isEmpty. Operand 1117 states and 2662 transitions. [2021-05-03 15:13:27,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:13:27,228 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:13:27,228 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:13:27,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2021-05-03 15:13:27,429 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:13:27,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:13:27,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1092520599, now seen corresponding path program 11 times [2021-05-03 15:13:27,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:13:27,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35980954] [2021-05-03 15:13:27,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:13:27,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:13:28,062 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:28,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35980954] [2021-05-03 15:13:28,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271558202] [2021-05-03 15:13:28,062 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:13:28,079 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 15:13:28,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:13:28,080 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:13:28,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:13:28,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 15:13:28,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:13:28,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:13:28,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:13:28,591 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-05-03 15:13:28,668 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:28,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:13:28,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-05-03 15:13:28,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243199556] [2021-05-03 15:13:28,669 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 15:13:28,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:13:28,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 15:13:28,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:13:28,669 INFO L87 Difference]: Start difference. First operand 1117 states and 2662 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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) [2021-05-03 15:13:31,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:13:31,570 INFO L93 Difference]: Finished difference Result 2448 states and 5966 transitions. [2021-05-03 15:13:31,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 15:13:31,572 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 30 [2021-05-03 15:13:31,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:13:31,575 INFO L225 Difference]: With dead ends: 2448 [2021-05-03 15:13:31,575 INFO L226 Difference]: Without dead ends: 2438 [2021-05-03 15:13:31,575 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 2131.6ms TimeCoverageRelationStatistics Valid=233, Invalid=957, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 15:13:31,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2438 states. [2021-05-03 15:13:31,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2438 to 1114. [2021-05-03 15:13:31,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 1113 states have (on average 2.38544474393531) internal successors, (2655), 1113 states have internal predecessors, (2655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:13:31,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 2655 transitions. [2021-05-03 15:13:31,588 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 2655 transitions. Word has length 30 [2021-05-03 15:13:31,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:13:31,588 INFO L480 AbstractCegarLoop]: Abstraction has 1114 states and 2655 transitions. [2021-05-03 15:13:31,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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) [2021-05-03 15:13:31,588 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 2655 transitions. [2021-05-03 15:13:31,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:13:31,589 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:13:31,589 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:13:31,790 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:13:31,790 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:13:31,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:13:31,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1905442861, now seen corresponding path program 12 times [2021-05-03 15:13:31,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:13:31,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204207160] [2021-05-03 15:13:31,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:13:31,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:13:32,330 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-05-03 15:13:32,564 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:32,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204207160] [2021-05-03 15:13:32,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297204591] [2021-05-03 15:13:32,564 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:13:32,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 15:13:32,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:13:32,582 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 15:13:32,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:13:33,078 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:13:33,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-05-03 15:13:33,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:13:33,223 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-05-03 15:13:33,224 INFO L628 ElimStorePlain]: treesize reduction 8, result has 88.2 percent of original size [2021-05-03 15:13:33,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:13:33,226 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:60 [2021-05-03 15:13:33,600 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:33,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:13:33,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2021-05-03 15:13:33,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104542533] [2021-05-03 15:13:33,600 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 15:13:33,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:13:33,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 15:13:33,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2021-05-03 15:13:33,601 INFO L87 Difference]: Start difference. First operand 1114 states and 2655 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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) [2021-05-03 15:13:34,153 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-05-03 15:13:34,907 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2021-05-03 15:13:35,382 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-05-03 15:13:35,603 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-05-03 15:13:36,383 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2021-05-03 15:13:36,615 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-05-03 15:13:36,856 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2021-05-03 15:13:37,079 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-05-03 15:13:37,375 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2021-05-03 15:13:37,899 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-03 15:13:38,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:13:38,918 INFO L93 Difference]: Finished difference Result 2507 states and 6111 transitions. [2021-05-03 15:13:38,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 15:13:38,920 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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 30 [2021-05-03 15:13:38,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:13:38,923 INFO L225 Difference]: With dead ends: 2507 [2021-05-03 15:13:38,923 INFO L226 Difference]: Without dead ends: 2496 [2021-05-03 15:13:38,923 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 4350.9ms TimeCoverageRelationStatistics Valid=364, Invalid=1616, Unknown=0, NotChecked=0, Total=1980 [2021-05-03 15:13:38,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2496 states. [2021-05-03 15:13:38,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2496 to 1135. [2021-05-03 15:13:38,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1135 states, 1134 states have (on average 2.3915343915343916) internal successors, (2712), 1134 states have internal predecessors, (2712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:13:38,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 2712 transitions. [2021-05-03 15:13:38,936 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 2712 transitions. Word has length 30 [2021-05-03 15:13:38,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:13:38,936 INFO L480 AbstractCegarLoop]: Abstraction has 1135 states and 2712 transitions. [2021-05-03 15:13:38,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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) [2021-05-03 15:13:38,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 2712 transitions. [2021-05-03 15:13:38,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:13:38,937 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:13:38,937 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:13:39,137 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable318 [2021-05-03 15:13:39,138 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:13:39,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:13:39,138 INFO L82 PathProgramCache]: Analyzing trace with hash -633123385, now seen corresponding path program 13 times [2021-05-03 15:13:39,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:13:39,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970910774] [2021-05-03 15:13:39,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:13:39,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:13:39,666 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-05-03 15:13:39,909 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:39,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970910774] [2021-05-03 15:13:39,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331791302] [2021-05-03 15:13:39,909 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:13:39,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:13:39,926 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:13:39,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:13:40,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-05-03 15:13:40,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:13:40,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:13:40,348 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:13:40,348 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-05-03 15:13:40,437 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:40,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:13:40,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-05-03 15:13:40,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281340342] [2021-05-03 15:13:40,437 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 15:13:40,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:13:40,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 15:13:40,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:13:40,438 INFO L87 Difference]: Start difference. First operand 1135 states and 2712 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) [2021-05-03 15:13:41,568 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-05-03 15:13:42,030 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-05-03 15:13:42,481 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-05-03 15:13:42,835 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-05-03 15:13:43,016 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-05-03 15:13:43,971 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2021-05-03 15:13:44,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:13:44,562 INFO L93 Difference]: Finished difference Result 2762 states and 6791 transitions. [2021-05-03 15:13:44,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 15:13:44,565 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 30 [2021-05-03 15:13:44,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:13:44,568 INFO L225 Difference]: With dead ends: 2762 [2021-05-03 15:13:44,568 INFO L226 Difference]: Without dead ends: 2742 [2021-05-03 15:13:44,568 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 3439.2ms TimeCoverageRelationStatistics Valid=338, Invalid=1468, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 15:13:44,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2742 states. [2021-05-03 15:13:44,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2742 to 1126. [2021-05-03 15:13:44,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1126 states, 1125 states have (on average 2.3866666666666667) internal successors, (2685), 1125 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:13:44,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 2685 transitions. [2021-05-03 15:13:44,582 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 2685 transitions. Word has length 30 [2021-05-03 15:13:44,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:13:44,583 INFO L480 AbstractCegarLoop]: Abstraction has 1126 states and 2685 transitions. [2021-05-03 15:13:44,583 INFO L481 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) [2021-05-03 15:13:44,583 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 2685 transitions. [2021-05-03 15:13:44,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:13:44,583 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:13:44,584 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:13:44,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:13:44,784 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:13:44,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:13:44,784 INFO L82 PathProgramCache]: Analyzing trace with hash 895830683, now seen corresponding path program 14 times [2021-05-03 15:13:44,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:13:44,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033608738] [2021-05-03 15:13:44,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:13:44,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:13:45,393 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-05-03 15:13:45,656 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:45,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033608738] [2021-05-03 15:13:45,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210761844] [2021-05-03 15:13:45,657 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:13:45,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:13:45,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:13:45,675 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 15:13:45,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:13:46,254 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:13:46,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-05-03 15:13:46,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:13:46,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:13:46,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:13:46,328 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:32 [2021-05-03 15:13:46,661 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:46,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:13:46,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 24 [2021-05-03 15:13:46,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066131430] [2021-05-03 15:13:46,662 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 15:13:46,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:13:46,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 15:13:46,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2021-05-03 15:13:46,662 INFO L87 Difference]: Start difference. First operand 1126 states and 2685 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 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) [2021-05-03 15:13:47,509 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2021-05-03 15:13:47,889 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-05-03 15:13:48,218 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2021-05-03 15:13:48,577 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-05-03 15:13:48,874 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-05-03 15:13:49,236 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-05-03 15:13:49,722 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-05-03 15:13:49,878 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-05-03 15:13:50,175 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2021-05-03 15:13:50,381 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-05-03 15:13:51,104 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2021-05-03 15:13:51,268 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-05-03 15:13:51,446 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 28 [2021-05-03 15:13:52,549 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-05-03 15:13:52,795 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-05-03 15:13:53,126 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-05-03 15:13:54,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:13:54,060 INFO L93 Difference]: Finished difference Result 2744 states and 6684 transitions. [2021-05-03 15:13:54,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-03 15:13:54,062 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 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 30 [2021-05-03 15:13:54,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:13:54,065 INFO L225 Difference]: With dead ends: 2744 [2021-05-03 15:13:54,065 INFO L226 Difference]: Without dead ends: 2724 [2021-05-03 15:13:54,066 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 6054.8ms TimeCoverageRelationStatistics Valid=576, Invalid=2076, Unknown=0, NotChecked=0, Total=2652 [2021-05-03 15:13:54,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2724 states. [2021-05-03 15:13:54,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2724 to 1117. [2021-05-03 15:13:54,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1117 states, 1116 states have (on average 2.3853046594982077) internal successors, (2662), 1116 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:13:54,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1117 states to 1117 states and 2662 transitions. [2021-05-03 15:13:54,080 INFO L78 Accepts]: Start accepts. Automaton has 1117 states and 2662 transitions. Word has length 30 [2021-05-03 15:13:54,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:13:54,080 INFO L480 AbstractCegarLoop]: Abstraction has 1117 states and 2662 transitions. [2021-05-03 15:13:54,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 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) [2021-05-03 15:13:54,080 INFO L276 IsEmpty]: Start isEmpty. Operand 1117 states and 2662 transitions. [2021-05-03 15:13:54,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:13:54,081 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:13:54,081 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:13:54,281 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2021-05-03 15:13:54,282 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:13:54,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:13:54,282 INFO L82 PathProgramCache]: Analyzing trace with hash 578985487, now seen corresponding path program 15 times [2021-05-03 15:13:54,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:13:54,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042623389] [2021-05-03 15:13:54,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:13:54,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:13:54,720 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-05-03 15:13:54,982 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-05-03 15:13:55,236 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:55,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042623389] [2021-05-03 15:13:55,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635057648] [2021-05-03 15:13:55,237 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:13:55,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 15:13:55,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:13:55,256 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 15:13:55,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:13:55,750 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:13:55,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-05-03 15:13:55,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:13:55,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:13:55,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:13:55,821 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:38 [2021-05-03 15:13:56,418 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-05-03 15:13:56,721 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-05-03 15:13:57,352 WARN L205 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-05-03 15:13:57,476 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:57,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:13:57,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-05-03 15:13:57,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266061500] [2021-05-03 15:13:57,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 15:13:57,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:13:57,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 15:13:57,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-05-03 15:13:57,477 INFO L87 Difference]: Start difference. First operand 1117 states and 2662 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) 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) [2021-05-03 15:13:57,636 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 18 [2021-05-03 15:13:58,124 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-05-03 15:13:58,565 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-05-03 15:13:59,218 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 18 [2021-05-03 15:13:59,556 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-05-03 15:13:59,824 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2021-05-03 15:14:00,324 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2021-05-03 15:14:01,394 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 27 [2021-05-03 15:14:01,847 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2021-05-03 15:14:02,845 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2021-05-03 15:14:03,164 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2021-05-03 15:14:03,997 WARN L205 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2021-05-03 15:14:04,557 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-05-03 15:14:05,018 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-05-03 15:14:05,815 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 31 [2021-05-03 15:14:06,462 WARN L205 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-05-03 15:14:06,905 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 34 [2021-05-03 15:14:07,294 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 24 [2021-05-03 15:14:07,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:14:07,478 INFO L93 Difference]: Finished difference Result 2397 states and 5857 transitions. [2021-05-03 15:14:07,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-03 15:14:07,481 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) 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 30 [2021-05-03 15:14:07,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:14:07,484 INFO L225 Difference]: With dead ends: 2397 [2021-05-03 15:14:07,484 INFO L226 Difference]: Without dead ends: 2386 [2021-05-03 15:14:07,484 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 9248.1ms TimeCoverageRelationStatistics Valid=421, Invalid=2441, Unknown=0, NotChecked=0, Total=2862 [2021-05-03 15:14:07,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2386 states. [2021-05-03 15:14:07,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2386 to 1127. [2021-05-03 15:14:07,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1127 states, 1126 states have (on average 2.3889875666074603) internal successors, (2690), 1126 states have internal predecessors, (2690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:14:07,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 2690 transitions. [2021-05-03 15:14:07,498 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 2690 transitions. Word has length 30 [2021-05-03 15:14:07,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:14:07,498 INFO L480 AbstractCegarLoop]: Abstraction has 1127 states and 2690 transitions. [2021-05-03 15:14:07,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8461538461538463) 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) [2021-05-03 15:14:07,498 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 2690 transitions. [2021-05-03 15:14:07,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:14:07,499 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:14:07,499 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:14:07,699 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable331,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:14:07,699 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:14:07,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:14:07,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1959580759, now seen corresponding path program 16 times [2021-05-03 15:14:07,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:14:07,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141641822] [2021-05-03 15:14:07,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:14:07,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:14:08,163 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-05-03 15:14:08,297 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-05-03 15:14:08,439 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-05-03 15:14:08,673 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:14:08,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141641822] [2021-05-03 15:14:08,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244271673] [2021-05-03 15:14:08,673 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:14:08,689 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:14:08,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:14:08,690 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:14:08,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:14:09,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-05-03 15:14:09,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:14:09,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:14:09,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:14:09,183 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-05-03 15:14:09,284 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:14:09,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:14:09,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-05-03 15:14:09,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962524980] [2021-05-03 15:14:09,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 15:14:09,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:14:09,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 15:14:09,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:14:09,285 INFO L87 Difference]: Start difference. First operand 1127 states and 2690 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) [2021-05-03 15:14:09,806 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-05-03 15:14:09,987 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-05-03 15:14:10,196 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-05-03 15:14:10,823 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-05-03 15:14:11,482 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2021-05-03 15:14:11,729 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-05-03 15:14:12,296 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2021-05-03 15:14:12,692 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-05-03 15:14:12,959 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-05-03 15:14:13,883 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-05-03 15:14:14,199 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-05-03 15:14:14,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:14:14,532 INFO L93 Difference]: Finished difference Result 2757 states and 6773 transitions. [2021-05-03 15:14:14,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-03 15:14:14,535 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 30 [2021-05-03 15:14:14,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:14:14,538 INFO L225 Difference]: With dead ends: 2757 [2021-05-03 15:14:14,538 INFO L226 Difference]: Without dead ends: 2737 [2021-05-03 15:14:14,539 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 4462.5ms TimeCoverageRelationStatistics Valid=363, Invalid=1799, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 15:14:14,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2737 states. [2021-05-03 15:14:14,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2737 to 1120. [2021-05-03 15:14:14,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1119 states have (on average 2.385165326184093) internal successors, (2669), 1119 states have internal predecessors, (2669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:14:14,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 2669 transitions. [2021-05-03 15:14:14,554 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 2669 transitions. Word has length 30 [2021-05-03 15:14:14,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:14:14,554 INFO L480 AbstractCegarLoop]: Abstraction has 1120 states and 2669 transitions. [2021-05-03 15:14:14,554 INFO L481 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) [2021-05-03 15:14:14,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 2669 transitions. [2021-05-03 15:14:14,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:14:14,555 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:14:14,555 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:14:14,755 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2021-05-03 15:14:14,756 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:14:14,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:14:14,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1759811339, now seen corresponding path program 17 times [2021-05-03 15:14:14,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:14:14,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178103597] [2021-05-03 15:14:14,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:14:14,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:14:15,520 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:14:15,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178103597] [2021-05-03 15:14:15,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158290597] [2021-05-03 15:14:15,520 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:14:15,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 15:14:15,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:14:15,538 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:14:15,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:14:16,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-05-03 15:14:16,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:14:16,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:14:16,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:14:16,047 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-05-03 15:14:16,149 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:14:16,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:14:16,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-05-03 15:14:16,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408838311] [2021-05-03 15:14:16,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 15:14:16,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:14:16,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 15:14:16,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-05-03 15:14:16,150 INFO L87 Difference]: Start difference. First operand 1120 states and 2669 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 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) [2021-05-03 15:14:16,529 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-05-03 15:14:17,002 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2021-05-03 15:14:17,517 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-05-03 15:14:17,770 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-05-03 15:14:18,225 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-05-03 15:14:18,488 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-05-03 15:14:18,726 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-05-03 15:14:19,775 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-05-03 15:14:20,344 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2021-05-03 15:14:20,784 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-05-03 15:14:21,104 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-05-03 15:14:21,437 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-05-03 15:14:21,616 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-05-03 15:14:21,894 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-05-03 15:14:22,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:14:22,828 INFO L93 Difference]: Finished difference Result 2832 states and 6973 transitions. [2021-05-03 15:14:22,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-03 15:14:22,831 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 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 30 [2021-05-03 15:14:22,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:14:22,834 INFO L225 Difference]: With dead ends: 2832 [2021-05-03 15:14:22,834 INFO L226 Difference]: Without dead ends: 2822 [2021-05-03 15:14:22,834 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 5204.8ms TimeCoverageRelationStatistics Valid=392, Invalid=2158, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 15:14:22,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2822 states. [2021-05-03 15:14:22,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2822 to 1120. [2021-05-03 15:14:22,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1119 states have (on average 2.385165326184093) internal successors, (2669), 1119 states have internal predecessors, (2669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:14:22,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 2669 transitions. [2021-05-03 15:14:22,849 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 2669 transitions. Word has length 30 [2021-05-03 15:14:22,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:14:22,850 INFO L480 AbstractCegarLoop]: Abstraction has 1120 states and 2669 transitions. [2021-05-03 15:14:22,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 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) [2021-05-03 15:14:22,850 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 2669 transitions. [2021-05-03 15:14:22,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:14:22,851 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:14:22,851 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:14:23,051 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2021-05-03 15:14:23,051 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:14:23,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:14:23,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1045600267, now seen corresponding path program 18 times [2021-05-03 15:14:23,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:14:23,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843194423] [2021-05-03 15:14:23,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:14:23,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:14:23,509 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-05-03 15:14:23,642 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-05-03 15:14:23,867 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:14:23,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843194423] [2021-05-03 15:14:23,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492823831] [2021-05-03 15:14:23,868 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:14:23,885 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 15:14:23,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:14:23,886 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 15:14:23,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:14:24,655 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:14:24,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-05-03 15:14:24,672 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:14:24,816 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-05-03 15:14:24,817 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-05-03 15:14:24,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:14:24,819 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:40 [2021-05-03 15:14:25,163 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:14:25,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:14:25,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-05-03 15:14:25,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643849222] [2021-05-03 15:14:25,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 15:14:25,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:14:25,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 15:14:25,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-05-03 15:14:25,164 INFO L87 Difference]: Start difference. First operand 1120 states and 2669 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) 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) [2021-05-03 15:14:25,576 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-05-03 15:14:26,656 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-05-03 15:14:27,137 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-05-03 15:14:28,615 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-05-03 15:14:29,352 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-05-03 15:14:29,999 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2021-05-03 15:14:31,020 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2021-05-03 15:14:31,622 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-05-03 15:14:32,476 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 24 [2021-05-03 15:14:33,424 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-05-03 15:14:33,808 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-05-03 15:14:34,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:14:34,289 INFO L93 Difference]: Finished difference Result 2423 states and 5914 transitions. [2021-05-03 15:14:34,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-03 15:14:34,292 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) 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 30 [2021-05-03 15:14:34,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:14:34,295 INFO L225 Difference]: With dead ends: 2423 [2021-05-03 15:14:34,295 INFO L226 Difference]: Without dead ends: 2414 [2021-05-03 15:14:34,296 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 5983.0ms TimeCoverageRelationStatistics Valid=347, Invalid=3075, Unknown=0, NotChecked=0, Total=3422 [2021-05-03 15:14:34,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2414 states. [2021-05-03 15:14:34,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2414 to 1119. [2021-05-03 15:14:34,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 2.3855098389982112) internal successors, (2667), 1118 states have internal predecessors, (2667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:14:34,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 2667 transitions. [2021-05-03 15:14:34,317 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 2667 transitions. Word has length 30 [2021-05-03 15:14:34,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:14:34,317 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 2667 transitions. [2021-05-03 15:14:34,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) 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) [2021-05-03 15:14:34,318 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 2667 transitions. [2021-05-03 15:14:34,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:14:34,318 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:14:34,319 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:14:34,519 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable346,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:14:34,519 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:14:34,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:14:34,519 INFO L82 PathProgramCache]: Analyzing trace with hash -462514351, now seen corresponding path program 19 times [2021-05-03 15:14:34,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:14:34,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330622534] [2021-05-03 15:14:34,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:14:34,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:14:34,991 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-05-03 15:14:35,152 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-05-03 15:14:35,453 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:14:35,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330622534] [2021-05-03 15:14:35,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020576463] [2021-05-03 15:14:35,453 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:14:35,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:14:35,470 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:14:35,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:14:36,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-05-03 15:14:36,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:14:36,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:14:36,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:14:36,094 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2021-05-03 15:14:36,183 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:14:36,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:14:36,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2021-05-03 15:14:36,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728768858] [2021-05-03 15:14:36,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 15:14:36,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:14:36,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 15:14:36,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:14:36,185 INFO L87 Difference]: Start difference. First operand 1119 states and 2667 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) [2021-05-03 15:14:36,352 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 25 [2021-05-03 15:14:36,592 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-05-03 15:14:36,934 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-05-03 15:14:37,449 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-05-03 15:14:37,788 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-05-03 15:14:37,989 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-05-03 15:14:38,312 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-05-03 15:14:38,513 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-05-03 15:14:39,529 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-05-03 15:14:41,546 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2021-05-03 15:14:42,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:14:42,320 INFO L93 Difference]: Finished difference Result 2475 states and 6050 transitions. [2021-05-03 15:14:42,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-03 15:14:42,323 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 30 [2021-05-03 15:14:42,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:14:42,325 INFO L225 Difference]: With dead ends: 2475 [2021-05-03 15:14:42,325 INFO L226 Difference]: Without dead ends: 2466 [2021-05-03 15:14:42,326 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 4252.8ms TimeCoverageRelationStatistics Valid=268, Invalid=1802, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 15:14:42,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2466 states. [2021-05-03 15:14:42,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2466 to 1134. [2021-05-03 15:14:42,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1134 states, 1133 states have (on average 2.3874669020300088) internal successors, (2705), 1133 states have internal predecessors, (2705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:14:42,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1134 states to 1134 states and 2705 transitions. [2021-05-03 15:14:42,340 INFO L78 Accepts]: Start accepts. Automaton has 1134 states and 2705 transitions. Word has length 30 [2021-05-03 15:14:42,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:14:42,340 INFO L480 AbstractCegarLoop]: Abstraction has 1134 states and 2705 transitions. [2021-05-03 15:14:42,340 INFO L481 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) [2021-05-03 15:14:42,340 INFO L276 IsEmpty]: Start isEmpty. Operand 1134 states and 2705 transitions. [2021-05-03 15:14:42,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:14:42,341 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:14:42,341 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:14:42,542 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable352 [2021-05-03 15:14:42,542 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:14:42,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:14:42,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1955559275, now seen corresponding path program 20 times [2021-05-03 15:14:42,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:14:42,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523974867] [2021-05-03 15:14:42,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:14:42,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:14:42,952 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-05-03 15:14:43,083 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-05-03 15:14:43,373 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:14:43,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523974867] [2021-05-03 15:14:43,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436273173] [2021-05-03 15:14:43,373 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:14:43,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:14:43,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:14:43,391 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:14:43,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:14:43,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-05-03 15:14:43,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:14:43,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:14:43,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:14:43,917 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-05-03 15:14:44,008 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:14:44,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:14:44,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-05-03 15:14:44,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524481142] [2021-05-03 15:14:44,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 15:14:44,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:14:44,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 15:14:44,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-05-03 15:14:44,009 INFO L87 Difference]: Start difference. First operand 1134 states and 2705 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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) [2021-05-03 15:14:44,343 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-05-03 15:14:44,615 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2021-05-03 15:14:45,083 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-05-03 15:14:45,397 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-05-03 15:14:45,610 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-05-03 15:14:45,920 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2021-05-03 15:14:46,124 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-05-03 15:14:47,069 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-05-03 15:14:47,390 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-05-03 15:14:48,555 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-05-03 15:14:49,588 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-05-03 15:14:50,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:14:50,332 INFO L93 Difference]: Finished difference Result 2534 states and 6223 transitions. [2021-05-03 15:14:50,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-03 15:14:50,335 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 30 [2021-05-03 15:14:50,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:14:50,338 INFO L225 Difference]: With dead ends: 2534 [2021-05-03 15:14:50,338 INFO L226 Difference]: Without dead ends: 2523 [2021-05-03 15:14:50,338 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 4243.8ms TimeCoverageRelationStatistics Valid=302, Invalid=1768, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 15:14:50,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2523 states. [2021-05-03 15:14:50,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2523 to 1146. [2021-05-03 15:14:50,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1146 states, 1145 states have (on average 2.3912663755458516) internal successors, (2738), 1145 states have internal predecessors, (2738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:14:50,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1146 states to 1146 states and 2738 transitions. [2021-05-03 15:14:50,352 INFO L78 Accepts]: Start accepts. Automaton has 1146 states and 2738 transitions. Word has length 30 [2021-05-03 15:14:50,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:14:50,352 INFO L480 AbstractCegarLoop]: Abstraction has 1146 states and 2738 transitions. [2021-05-03 15:14:50,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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) [2021-05-03 15:14:50,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1146 states and 2738 transitions. [2021-05-03 15:14:50,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:14:50,353 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:14:50,353 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:14:50,554 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable353 [2021-05-03 15:14:50,554 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:14:50,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:14:50,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1820757867, now seen corresponding path program 21 times [2021-05-03 15:14:50,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:14:50,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206832726] [2021-05-03 15:14:50,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:14:50,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:14:51,031 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-05-03 15:14:51,166 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-05-03 15:14:51,431 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:14:51,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206832726] [2021-05-03 15:14:51,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762512746] [2021-05-03 15:14:51,431 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:14:51,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 15:14:51,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:14:51,459 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 15:14:51,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:14:52,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-05-03 15:14:52,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:14:52,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:14:52,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:14:52,067 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-05-03 15:14:52,175 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:14:52,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:14:52,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2021-05-03 15:14:52,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669778233] [2021-05-03 15:14:52,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 15:14:52,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:14:52,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 15:14:52,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:14:52,176 INFO L87 Difference]: Start difference. First operand 1146 states and 2738 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 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) [2021-05-03 15:14:52,345 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 25 [2021-05-03 15:14:52,557 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-05-03 15:14:52,840 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-05-03 15:14:53,501 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-05-03 15:14:53,680 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-05-03 15:14:53,917 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2021-05-03 15:14:54,092 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-05-03 15:14:54,899 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-05-03 15:14:55,258 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-05-03 15:14:55,807 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-05-03 15:14:56,060 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-05-03 15:14:57,422 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-05-03 15:14:57,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:14:57,895 INFO L93 Difference]: Finished difference Result 2645 states and 6506 transitions. [2021-05-03 15:14:57,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-03 15:14:57,898 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 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 30 [2021-05-03 15:14:57,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:14:57,901 INFO L225 Difference]: With dead ends: 2645 [2021-05-03 15:14:57,901 INFO L226 Difference]: Without dead ends: 2625 [2021-05-03 15:14:57,901 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 4618.8ms TimeCoverageRelationStatistics Valid=342, Invalid=1914, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 15:14:57,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2625 states. [2021-05-03 15:14:57,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2625 to 1137. [2021-05-03 15:14:57,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1136 states have (on average 2.387323943661972) internal successors, (2712), 1136 states have internal predecessors, (2712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:14:57,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 2712 transitions. [2021-05-03 15:14:57,917 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 2712 transitions. Word has length 30 [2021-05-03 15:14:57,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:14:57,917 INFO L480 AbstractCegarLoop]: Abstraction has 1137 states and 2712 transitions. [2021-05-03 15:14:57,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 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) [2021-05-03 15:14:57,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 2712 transitions. [2021-05-03 15:14:57,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:14:57,918 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:14:57,918 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:14:58,118 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2021-05-03 15:14:58,119 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:14:58,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:14:58,119 INFO L82 PathProgramCache]: Analyzing trace with hash -675951543, now seen corresponding path program 22 times [2021-05-03 15:14:58,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:14:58,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725017663] [2021-05-03 15:14:58,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:14:58,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:14:58,568 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-05-03 15:14:58,706 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-05-03 15:14:58,965 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:14:58,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725017663] [2021-05-03 15:14:58,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990014216] [2021-05-03 15:14:58,966 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:14:58,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:14:58,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:14:58,984 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:14:58,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:14:59,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-05-03 15:14:59,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:14:59,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:14:59,574 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:14:59,574 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2021-05-03 15:14:59,659 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:14:59,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:14:59,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2021-05-03 15:14:59,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391730710] [2021-05-03 15:14:59,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 15:14:59,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:14:59,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 15:14:59,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:14:59,660 INFO L87 Difference]: Start difference. First operand 1137 states and 2712 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 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) [2021-05-03 15:15:00,017 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-05-03 15:15:00,380 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2021-05-03 15:15:00,944 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-05-03 15:15:01,321 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-05-03 15:15:01,530 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-05-03 15:15:01,916 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-05-03 15:15:02,213 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-05-03 15:15:03,705 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-05-03 15:15:04,850 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-05-03 15:15:05,760 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-05-03 15:15:07,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:15:07,690 INFO L93 Difference]: Finished difference Result 2453 states and 5999 transitions. [2021-05-03 15:15:07,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-03 15:15:07,693 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 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 30 [2021-05-03 15:15:07,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:15:07,696 INFO L225 Difference]: With dead ends: 2453 [2021-05-03 15:15:07,696 INFO L226 Difference]: Without dead ends: 2444 [2021-05-03 15:15:07,696 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 4710.1ms TimeCoverageRelationStatistics Valid=286, Invalid=1970, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 15:15:07,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2444 states. [2021-05-03 15:15:07,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2444 to 1131. [2021-05-03 15:15:07,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 1130 states have (on average 2.3876106194690268) internal successors, (2698), 1130 states have internal predecessors, (2698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:15:07,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 2698 transitions. [2021-05-03 15:15:07,712 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 2698 transitions. Word has length 30 [2021-05-03 15:15:07,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:15:07,712 INFO L480 AbstractCegarLoop]: Abstraction has 1131 states and 2698 transitions. [2021-05-03 15:15:07,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 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) [2021-05-03 15:15:07,712 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 2698 transitions. [2021-05-03 15:15:07,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:15:07,713 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:15:07,713 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:15:07,925 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2021-05-03 15:15:07,927 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:15:07,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:15:07,928 INFO L82 PathProgramCache]: Analyzing trace with hash 309204733, now seen corresponding path program 23 times [2021-05-03 15:15:07,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:15:07,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003805394] [2021-05-03 15:15:07,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:15:07,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:15:08,394 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-05-03 15:15:08,552 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-05-03 15:15:08,743 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-05-03 15:15:09,070 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:15:09,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003805394] [2021-05-03 15:15:09,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729880198] [2021-05-03 15:15:09,071 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:15:09,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 15:15:09,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:15:09,090 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:15:09,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:15:09,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-05-03 15:15:09,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:15:09,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:15:09,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:15:09,653 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-05-03 15:15:09,768 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:15:09,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:15:09,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-05-03 15:15:09,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753081061] [2021-05-03 15:15:09,769 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 15:15:09,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:15:09,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 15:15:09,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:15:09,769 INFO L87 Difference]: Start difference. First operand 1131 states and 2698 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) [2021-05-03 15:15:10,302 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-05-03 15:15:10,548 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-05-03 15:15:10,951 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-05-03 15:15:11,195 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-05-03 15:15:11,425 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 22 [2021-05-03 15:15:11,728 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-05-03 15:15:12,278 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2021-05-03 15:15:13,708 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 25 [2021-05-03 15:15:13,993 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2021-05-03 15:15:14,353 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 25 [2021-05-03 15:15:15,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:15:15,211 INFO L93 Difference]: Finished difference Result 2566 states and 6269 transitions. [2021-05-03 15:15:15,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 15:15:15,213 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 30 [2021-05-03 15:15:15,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:15:15,216 INFO L225 Difference]: With dead ends: 2566 [2021-05-03 15:15:15,216 INFO L226 Difference]: Without dead ends: 2555 [2021-05-03 15:15:15,216 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 3861.2ms TimeCoverageRelationStatistics Valid=265, Invalid=1217, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 15:15:15,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2555 states. [2021-05-03 15:15:15,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2555 to 1152. [2021-05-03 15:15:15,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 1151 states have (on average 2.3935708079930493) internal successors, (2755), 1151 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:15:15,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 2755 transitions. [2021-05-03 15:15:15,231 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 2755 transitions. Word has length 30 [2021-05-03 15:15:15,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:15:15,231 INFO L480 AbstractCegarLoop]: Abstraction has 1152 states and 2755 transitions. [2021-05-03 15:15:15,231 INFO L481 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) [2021-05-03 15:15:15,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 2755 transitions. [2021-05-03 15:15:15,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:15:15,232 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:15:15,232 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:15:15,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2021-05-03 15:15:15,432 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:15:15,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:15:15,433 INFO L82 PathProgramCache]: Analyzing trace with hash 2065605783, now seen corresponding path program 24 times [2021-05-03 15:15:15,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:15:15,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284487422] [2021-05-03 15:15:15,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:15:15,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:15:15,902 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-05-03 15:15:16,035 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-05-03 15:15:16,213 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-05-03 15:15:16,514 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:15:16,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284487422] [2021-05-03 15:15:16,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17152554] [2021-05-03 15:15:16,514 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:15:16,531 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 15:15:16,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:15:16,532 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-03 15:15:16,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:15:17,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:15:17,078 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:15:17,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-05-03 15:15:17,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:15:17,304 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-05-03 15:15:17,305 INFO L628 ElimStorePlain]: treesize reduction 6, result has 90.5 percent of original size [2021-05-03 15:15:17,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:15:17,313 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:65 [2021-05-03 15:15:17,733 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-05-03 15:15:17,837 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:15:17,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:15:17,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 21 [2021-05-03 15:15:17,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375144880] [2021-05-03 15:15:17,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 15:15:17,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:15:17,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 15:15:17,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:15:17,838 INFO L87 Difference]: Start difference. First operand 1152 states and 2755 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 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) [2021-05-03 15:15:18,217 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-05-03 15:15:18,459 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-05-03 15:15:18,928 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 32 [2021-05-03 15:15:19,230 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 34 [2021-05-03 15:15:19,769 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-05-03 15:15:20,313 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 27 [2021-05-03 15:15:20,734 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-05-03 15:15:21,038 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-05-03 15:15:21,354 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2021-05-03 15:15:21,593 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-05-03 15:15:22,013 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 30 [2021-05-03 15:15:22,416 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2021-05-03 15:15:22,805 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 34 [2021-05-03 15:15:23,225 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2021-05-03 15:15:23,410 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2021-05-03 15:15:23,625 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2021-05-03 15:15:24,490 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 [2021-05-03 15:15:24,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:15:24,935 INFO L93 Difference]: Finished difference Result 2780 states and 6830 transitions. [2021-05-03 15:15:24,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-03 15:15:24,939 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 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 30 [2021-05-03 15:15:24,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:15:24,941 INFO L225 Difference]: With dead ends: 2780 [2021-05-03 15:15:24,941 INFO L226 Difference]: Without dead ends: 2768 [2021-05-03 15:15:24,942 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 6 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 6104.3ms TimeCoverageRelationStatistics Valid=405, Invalid=1575, Unknown=0, NotChecked=0, Total=1980 [2021-05-03 15:15:24,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2768 states. [2021-05-03 15:15:24,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2768 to 1177. [2021-05-03 15:15:24,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1177 states, 1176 states have (on average 2.3962585034013606) internal successors, (2818), 1176 states have internal predecessors, (2818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:15:24,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 2818 transitions. [2021-05-03 15:15:24,956 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 2818 transitions. Word has length 30 [2021-05-03 15:15:24,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:15:24,957 INFO L480 AbstractCegarLoop]: Abstraction has 1177 states and 2818 transitions. [2021-05-03 15:15:24,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 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) [2021-05-03 15:15:24,957 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 2818 transitions. [2021-05-03 15:15:24,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:15:24,958 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:15:24,958 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:15:25,158 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable357 [2021-05-03 15:15:25,158 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:15:25,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:15:25,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1147655593, now seen corresponding path program 25 times [2021-05-03 15:15:25,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:15:25,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668101460] [2021-05-03 15:15:25,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:15:25,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:15:25,618 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-05-03 15:15:25,766 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-05-03 15:15:25,962 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-05-03 15:15:26,292 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:15:26,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668101460] [2021-05-03 15:15:26,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467630950] [2021-05-03 15:15:26,292 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:15:26,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:15:26,311 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:15:26,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:15:26,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-05-03 15:15:26,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:15:26,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:15:26,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:15:26,872 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-05-03 15:15:27,089 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:15:27,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:15:27,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-05-03 15:15:27,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480655422] [2021-05-03 15:15:27,089 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 15:15:27,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:15:27,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 15:15:27,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:15:27,090 INFO L87 Difference]: Start difference. First operand 1177 states and 2818 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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) [2021-05-03 15:15:27,618 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-05-03 15:15:27,847 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-05-03 15:15:28,076 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2021-05-03 15:15:28,322 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-05-03 15:15:28,602 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-05-03 15:15:28,866 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-05-03 15:15:29,304 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-05-03 15:15:29,547 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-05-03 15:15:30,065 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 21 [2021-05-03 15:15:30,297 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2021-05-03 15:15:30,880 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-05-03 15:15:31,308 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-05-03 15:15:31,606 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-05-03 15:15:32,027 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-05-03 15:15:32,294 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-05-03 15:15:32,569 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 [2021-05-03 15:15:32,766 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 20 [2021-05-03 15:15:32,944 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-05-03 15:15:33,231 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 28 [2021-05-03 15:15:33,506 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 25 [2021-05-03 15:15:34,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:15:34,419 INFO L93 Difference]: Finished difference Result 3035 states and 7436 transitions. [2021-05-03 15:15:34,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-03 15:15:34,423 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 30 [2021-05-03 15:15:34,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:15:34,427 INFO L225 Difference]: With dead ends: 3035 [2021-05-03 15:15:34,427 INFO L226 Difference]: Without dead ends: 3008 [2021-05-03 15:15:34,427 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 5846.3ms TimeCoverageRelationStatistics Valid=511, Invalid=2039, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 15:15:34,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3008 states. [2021-05-03 15:15:34,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3008 to 1143. [2021-05-03 15:15:34,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1143 states, 1142 states have (on average 2.3887915936952715) internal successors, (2728), 1142 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:15:34,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1143 states to 1143 states and 2728 transitions. [2021-05-03 15:15:34,445 INFO L78 Accepts]: Start accepts. Automaton has 1143 states and 2728 transitions. Word has length 30 [2021-05-03 15:15:34,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:15:34,445 INFO L480 AbstractCegarLoop]: Abstraction has 1143 states and 2728 transitions. [2021-05-03 15:15:34,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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) [2021-05-03 15:15:34,445 INFO L276 IsEmpty]: Start isEmpty. Operand 1143 states and 2728 transitions. [2021-05-03 15:15:34,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:15:34,446 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:15:34,446 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:15:34,661 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable364 [2021-05-03 15:15:34,661 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:15:34,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:15:34,661 INFO L82 PathProgramCache]: Analyzing trace with hash -700407445, now seen corresponding path program 26 times [2021-05-03 15:15:34,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:15:34,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444429955] [2021-05-03 15:15:34,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:15:34,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:15:35,161 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-05-03 15:15:35,314 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-05-03 15:15:35,525 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-05-03 15:15:35,851 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:15:35,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444429955] [2021-05-03 15:15:35,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840150069] [2021-05-03 15:15:35,851 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:15:35,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:15:35,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:15:35,868 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 15:15:35,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:15:36,618 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:15:36,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-05-03 15:15:36,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:15:36,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:15:36,717 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:15:36,717 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:32 [2021-05-03 15:15:37,094 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:15:37,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:15:37,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 24 [2021-05-03 15:15:37,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306805246] [2021-05-03 15:15:37,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 15:15:37,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:15:37,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 15:15:37,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2021-05-03 15:15:37,095 INFO L87 Difference]: Start difference. First operand 1143 states and 2728 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 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) [2021-05-03 15:15:37,897 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 31 [2021-05-03 15:15:38,280 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-05-03 15:15:38,501 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-05-03 15:15:38,823 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2021-05-03 15:15:39,367 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-05-03 15:15:39,793 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-05-03 15:15:40,108 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-05-03 15:15:40,387 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-05-03 15:15:40,815 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-05-03 15:15:40,990 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2021-05-03 15:15:41,235 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-05-03 15:15:41,521 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-05-03 15:15:41,913 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-05-03 15:15:42,104 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-05-03 15:15:42,471 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2021-05-03 15:15:42,707 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-05-03 15:15:42,994 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 29 [2021-05-03 15:15:43,540 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 22 [2021-05-03 15:15:43,777 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-05-03 15:15:44,301 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-05-03 15:15:44,628 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-05-03 15:15:44,965 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-05-03 15:15:45,297 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-05-03 15:15:45,603 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 25 [2021-05-03 15:15:46,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:15:46,141 INFO L93 Difference]: Finished difference Result 2768 states and 6741 transitions. [2021-05-03 15:15:46,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-03 15:15:46,145 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 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 30 [2021-05-03 15:15:46,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:15:46,148 INFO L225 Difference]: With dead ends: 2768 [2021-05-03 15:15:46,148 INFO L226 Difference]: Without dead ends: 2748 [2021-05-03 15:15:46,148 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 7766.1ms TimeCoverageRelationStatistics Valid=574, Invalid=2078, Unknown=0, NotChecked=0, Total=2652 [2021-05-03 15:15:46,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2748 states. [2021-05-03 15:15:46,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2748 to 1151. [2021-05-03 15:15:46,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1151 states, 1150 states have (on average 2.388695652173913) internal successors, (2747), 1150 states have internal predecessors, (2747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:15:46,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 2747 transitions. [2021-05-03 15:15:46,173 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 2747 transitions. Word has length 30 [2021-05-03 15:15:46,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:15:46,173 INFO L480 AbstractCegarLoop]: Abstraction has 1151 states and 2747 transitions. [2021-05-03 15:15:46,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 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) [2021-05-03 15:15:46,173 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 2747 transitions. [2021-05-03 15:15:46,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:15:46,174 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:15:46,174 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:15:46,375 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2021-05-03 15:15:46,375 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:15:46,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:15:46,375 INFO L82 PathProgramCache]: Analyzing trace with hash 373838239, now seen corresponding path program 27 times [2021-05-03 15:15:46,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:15:46,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503622189] [2021-05-03 15:15:46,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:15:46,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:15:46,849 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-05-03 15:15:46,990 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-05-03 15:15:47,133 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-05-03 15:15:47,283 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-05-03 15:15:47,532 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:15:47,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503622189] [2021-05-03 15:15:47,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694753645] [2021-05-03 15:15:47,533 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:15:47,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 15:15:47,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:15:47,551 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 15:15:47,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:15:48,071 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:15:48,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-05-03 15:15:48,076 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:15:48,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:15:48,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:15:48,148 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:38 [2021-05-03 15:15:48,846 WARN L205 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-05-03 15:15:49,265 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-05-03 15:15:49,878 WARN L205 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-05-03 15:15:50,026 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:15:50,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:15:50,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-05-03 15:15:50,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653413070] [2021-05-03 15:15:50,027 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 15:15:50,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:15:50,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 15:15:50,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-05-03 15:15:50,027 INFO L87 Difference]: Start difference. First operand 1151 states and 2747 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) 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) [2021-05-03 15:15:50,194 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 18 [2021-05-03 15:15:50,744 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-05-03 15:15:51,409 WARN L205 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2021-05-03 15:15:52,446 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2021-05-03 15:15:53,205 WARN L205 SmtUtils]: Spent 653.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2021-05-03 15:15:53,481 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-05-03 15:15:53,773 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-05-03 15:15:54,413 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2021-05-03 15:15:54,728 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-05-03 15:15:56,157 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 33 [2021-05-03 15:15:57,304 WARN L205 SmtUtils]: Spent 760.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2021-05-03 15:15:57,857 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 35 [2021-05-03 15:15:58,856 WARN L205 SmtUtils]: Spent 550.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2021-05-03 15:15:59,419 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 37 [2021-05-03 15:15:59,700 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-05-03 15:16:00,937 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 31 [2021-05-03 15:16:01,707 WARN L205 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-05-03 15:16:02,261 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 34 [2021-05-03 15:16:02,789 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2021-05-03 15:16:03,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:16:03,021 INFO L93 Difference]: Finished difference Result 2465 states and 6023 transitions. [2021-05-03 15:16:03,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-03 15:16:03,024 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) 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 30 [2021-05-03 15:16:03,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:16:03,027 INFO L225 Difference]: With dead ends: 2465 [2021-05-03 15:16:03,027 INFO L226 Difference]: Without dead ends: 2454 [2021-05-03 15:16:03,027 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 11592.2ms TimeCoverageRelationStatistics Valid=456, Invalid=2514, Unknown=0, NotChecked=0, Total=2970 [2021-05-03 15:16:03,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2454 states. [2021-05-03 15:16:03,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2454 to 1161. [2021-05-03 15:16:03,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1161 states, 1160 states have (on average 2.3922413793103448) internal successors, (2775), 1160 states have internal predecessors, (2775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:16:03,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1161 states to 1161 states and 2775 transitions. [2021-05-03 15:16:03,045 INFO L78 Accepts]: Start accepts. Automaton has 1161 states and 2775 transitions. Word has length 30 [2021-05-03 15:16:03,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:16:03,046 INFO L480 AbstractCegarLoop]: Abstraction has 1161 states and 2775 transitions. [2021-05-03 15:16:03,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8461538461538463) 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) [2021-05-03 15:16:03,046 INFO L276 IsEmpty]: Start isEmpty. Operand 1161 states and 2775 transitions. [2021-05-03 15:16:03,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:16:03,047 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:16:03,047 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:16:03,247 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:16:03,247 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:16:03,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:16:03,247 INFO L82 PathProgramCache]: Analyzing trace with hash 2130239289, now seen corresponding path program 28 times [2021-05-03 15:16:03,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:16:03,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597426925] [2021-05-03 15:16:03,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:16:03,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:16:03,435 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2021-05-03 15:16:03,769 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-05-03 15:16:03,926 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-05-03 15:16:04,074 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-05-03 15:16:04,231 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-05-03 15:16:04,537 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:16:04,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597426925] [2021-05-03 15:16:04,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883384502] [2021-05-03 15:16:04,538 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:16:04,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:16:04,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:16:04,558 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:16:04,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:16:05,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-05-03 15:16:05,128 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:16:05,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:16:05,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:16:05,145 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-05-03 15:16:05,273 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:16:05,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:16:05,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-05-03 15:16:05,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312894243] [2021-05-03 15:16:05,273 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 15:16:05,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:16:05,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 15:16:05,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:16:05,274 INFO L87 Difference]: Start difference. First operand 1161 states and 2775 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) [2021-05-03 15:16:05,913 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-05-03 15:16:06,157 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-05-03 15:16:06,421 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-05-03 15:16:06,965 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-05-03 15:16:07,256 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-05-03 15:16:07,564 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-05-03 15:16:07,858 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 23 [2021-05-03 15:16:08,395 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-05-03 15:16:09,443 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-05-03 15:16:09,783 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-05-03 15:16:10,620 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-05-03 15:16:11,095 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-05-03 15:16:11,431 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-05-03 15:16:11,809 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-05-03 15:16:12,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:16:12,372 INFO L93 Difference]: Finished difference Result 2807 states and 6901 transitions. [2021-05-03 15:16:12,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-03 15:16:12,376 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 30 [2021-05-03 15:16:12,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:16:12,379 INFO L225 Difference]: With dead ends: 2807 [2021-05-03 15:16:12,379 INFO L226 Difference]: Without dead ends: 2787 [2021-05-03 15:16:12,379 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 5486.1ms TimeCoverageRelationStatistics Valid=384, Invalid=1686, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 15:16:12,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2787 states. [2021-05-03 15:16:12,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2787 to 1155. [2021-05-03 15:16:12,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1155 states, 1154 states have (on average 2.388214904679376) internal successors, (2756), 1154 states have internal predecessors, (2756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:16:12,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1155 states to 1155 states and 2756 transitions. [2021-05-03 15:16:12,395 INFO L78 Accepts]: Start accepts. Automaton has 1155 states and 2756 transitions. Word has length 30 [2021-05-03 15:16:12,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:16:12,395 INFO L480 AbstractCegarLoop]: Abstraction has 1155 states and 2756 transitions. [2021-05-03 15:16:12,396 INFO L481 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) [2021-05-03 15:16:12,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states and 2756 transitions. [2021-05-03 15:16:12,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:16:12,397 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:16:12,397 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:16:12,597 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-05-03 15:16:12,597 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:16:12,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:16:12,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1964958587, now seen corresponding path program 29 times [2021-05-03 15:16:12,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:16:12,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822263110] [2021-05-03 15:16:12,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:16:12,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:16:13,053 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-05-03 15:16:13,193 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-05-03 15:16:13,341 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-05-03 15:16:13,606 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:16:13,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822263110] [2021-05-03 15:16:13,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105994969] [2021-05-03 15:16:13,607 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:16:13,631 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 15:16:13,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:16:13,631 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:16:13,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:16:14,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-05-03 15:16:14,190 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:16:14,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:16:14,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:16:14,206 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-05-03 15:16:14,318 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:16:14,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:16:14,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-05-03 15:16:14,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351534222] [2021-05-03 15:16:14,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 15:16:14,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:16:14,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 15:16:14,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-05-03 15:16:14,319 INFO L87 Difference]: Start difference. First operand 1155 states and 2756 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 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) [2021-05-03 15:16:14,478 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 25 [2021-05-03 15:16:14,715 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-05-03 15:16:14,994 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-05-03 15:16:15,272 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2021-05-03 15:16:15,842 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-05-03 15:16:16,126 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-05-03 15:16:16,399 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-05-03 15:16:16,658 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-05-03 15:16:16,930 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-05-03 15:16:17,193 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-05-03 15:16:17,564 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-05-03 15:16:18,072 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-05-03 15:16:18,390 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 25 [2021-05-03 15:16:19,009 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-05-03 15:16:20,024 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-05-03 15:16:20,297 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-05-03 15:16:20,452 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-05-03 15:16:20,730 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2021-05-03 15:16:21,048 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-05-03 15:16:21,429 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-05-03 15:16:22,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:16:22,021 INFO L93 Difference]: Finished difference Result 2920 states and 7194 transitions. [2021-05-03 15:16:22,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-03 15:16:22,024 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 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 30 [2021-05-03 15:16:22,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:16:22,027 INFO L225 Difference]: With dead ends: 2920 [2021-05-03 15:16:22,027 INFO L226 Difference]: Without dead ends: 2905 [2021-05-03 15:16:22,027 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 6212.6ms TimeCoverageRelationStatistics Valid=418, Invalid=2132, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 15:16:22,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2905 states. [2021-05-03 15:16:22,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2905 to 1154. [2021-05-03 15:16:22,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1154 states, 1153 states have (on average 2.388551604509974) internal successors, (2754), 1153 states have internal predecessors, (2754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:16:22,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 2754 transitions. [2021-05-03 15:16:22,043 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 2754 transitions. Word has length 30 [2021-05-03 15:16:22,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:16:22,043 INFO L480 AbstractCegarLoop]: Abstraction has 1154 states and 2754 transitions. [2021-05-03 15:16:22,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 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) [2021-05-03 15:16:22,043 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 2754 transitions. [2021-05-03 15:16:22,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:16:22,044 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:16:22,044 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:16:22,244 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-05-03 15:16:22,244 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:16:22,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:16:22,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1250747515, now seen corresponding path program 30 times [2021-05-03 15:16:22,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:16:22,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690681156] [2021-05-03 15:16:22,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:16:22,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:16:22,728 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-05-03 15:16:22,884 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-05-03 15:16:23,038 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-05-03 15:16:23,306 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:16:23,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690681156] [2021-05-03 15:16:23,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392795427] [2021-05-03 15:16:23,306 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:16:23,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 15:16:23,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:16:23,324 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 15:16:23,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:16:24,200 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:16:24,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-05-03 15:16:24,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:16:24,361 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-05-03 15:16:24,362 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-05-03 15:16:24,364 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:16:24,364 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:40 [2021-05-03 15:16:24,763 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:16:24,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:16:24,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-05-03 15:16:24,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138078458] [2021-05-03 15:16:24,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 15:16:24,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:16:24,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 15:16:24,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-05-03 15:16:24,764 INFO L87 Difference]: Start difference. First operand 1154 states and 2754 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) 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) [2021-05-03 15:16:24,956 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 25 [2021-05-03 15:16:25,261 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-05-03 15:16:25,873 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-05-03 15:16:26,566 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-05-03 15:16:27,093 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-05-03 15:16:27,556 WARN L205 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-05-03 15:16:27,956 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2021-05-03 15:16:28,273 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-05-03 15:16:28,838 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-05-03 15:16:30,442 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-05-03 15:16:31,592 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-05-03 15:16:32,449 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-05-03 15:16:32,756 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-05-03 15:16:33,422 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2021-05-03 15:16:33,786 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-05-03 15:16:34,031 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-05-03 15:16:34,714 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2021-05-03 15:16:35,193 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2021-05-03 15:16:35,605 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-05-03 15:16:36,160 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2021-05-03 15:16:36,482 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-05-03 15:16:36,733 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-05-03 15:16:36,943 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-05-03 15:16:37,904 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 24 [2021-05-03 15:16:38,918 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-05-03 15:16:39,311 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-03 15:16:39,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:16:39,832 INFO L93 Difference]: Finished difference Result 2642 states and 6460 transitions. [2021-05-03 15:16:39,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-03 15:16:39,836 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) 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 30 [2021-05-03 15:16:39,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:16:39,838 INFO L225 Difference]: With dead ends: 2642 [2021-05-03 15:16:39,838 INFO L226 Difference]: Without dead ends: 2633 [2021-05-03 15:16:39,839 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1455 ImplicationChecksByTransitivity, 10120.7ms TimeCoverageRelationStatistics Valid=475, Invalid=4637, Unknown=0, NotChecked=0, Total=5112 [2021-05-03 15:16:39,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2633 states. [2021-05-03 15:16:39,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2633 to 1153. [2021-05-03 15:16:39,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1153 states, 1152 states have (on average 2.388888888888889) internal successors, (2752), 1152 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:16:39,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 2752 transitions. [2021-05-03 15:16:39,853 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 2752 transitions. Word has length 30 [2021-05-03 15:16:39,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:16:39,853 INFO L480 AbstractCegarLoop]: Abstraction has 1153 states and 2752 transitions. [2021-05-03 15:16:39,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) 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) [2021-05-03 15:16:39,853 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 2752 transitions. [2021-05-03 15:16:39,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:16:39,854 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:16:39,854 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:16:40,054 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:16:40,055 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:16:40,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:16:40,055 INFO L82 PathProgramCache]: Analyzing trace with hash 513543889, now seen corresponding path program 31 times [2021-05-03 15:16:40,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:16:40,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901000858] [2021-05-03 15:16:40,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:16:40,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:16:40,905 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:16:40,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901000858] [2021-05-03 15:16:40,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896210635] [2021-05-03 15:16:40,905 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:16:40,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:16:40,922 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:16:40,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:16:41,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-05-03 15:16:41,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:16:41,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:16:41,555 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:16:41,555 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-05-03 15:16:41,678 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:16:41,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:16:41,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-05-03 15:16:41,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129473418] [2021-05-03 15:16:41,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 15:16:41,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:16:41,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 15:16:41,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:16:41,679 INFO L87 Difference]: Start difference. First operand 1153 states and 2752 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) [2021-05-03 15:16:42,308 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-05-03 15:16:42,569 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-05-03 15:16:43,021 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2021-05-03 15:16:43,464 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-05-03 15:16:45,134 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-05-03 15:16:45,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:16:45,878 INFO L93 Difference]: Finished difference Result 2676 states and 6547 transitions. [2021-05-03 15:16:45,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 15:16:45,882 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 30 [2021-05-03 15:16:45,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:16:45,885 INFO L225 Difference]: With dead ends: 2676 [2021-05-03 15:16:45,886 INFO L226 Difference]: Without dead ends: 2665 [2021-05-03 15:16:45,886 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 3104.5ms TimeCoverageRelationStatistics Valid=226, Invalid=1106, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 15:16:45,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2665 states. [2021-05-03 15:16:45,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2665 to 1183. [2021-05-03 15:16:45,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1183 states, 1182 states have (on average 2.3984771573604062) internal successors, (2835), 1182 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:16:45,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 2835 transitions. [2021-05-03 15:16:45,902 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 2835 transitions. Word has length 30 [2021-05-03 15:16:45,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:16:45,902 INFO L480 AbstractCegarLoop]: Abstraction has 1183 states and 2835 transitions. [2021-05-03 15:16:45,902 INFO L481 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) [2021-05-03 15:16:45,903 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 2835 transitions. [2021-05-03 15:16:45,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:16:45,904 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:16:45,904 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:16:46,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:16:46,104 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:16:46,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:16:46,104 INFO L82 PathProgramCache]: Analyzing trace with hash -2025022357, now seen corresponding path program 32 times [2021-05-03 15:16:46,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:16:46,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760914096] [2021-05-03 15:16:46,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:16:46,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:16:46,967 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:16:46,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760914096] [2021-05-03 15:16:46,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293680497] [2021-05-03 15:16:46,967 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:16:46,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:16:46,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:16:46,985 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 15:16:46,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:16:47,705 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:16:47,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-05-03 15:16:47,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:16:47,907 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-05-03 15:16:47,908 INFO L628 ElimStorePlain]: treesize reduction 6, result has 90.3 percent of original size [2021-05-03 15:16:47,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:16:47,911 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:56 [2021-05-03 15:16:48,300 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:16:48,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:16:48,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2021-05-03 15:16:48,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120078765] [2021-05-03 15:16:48,301 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 15:16:48,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:16:48,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 15:16:48,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2021-05-03 15:16:48,301 INFO L87 Difference]: Start difference. First operand 1183 states and 2835 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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) [2021-05-03 15:16:48,656 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-05-03 15:16:48,880 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-05-03 15:16:49,233 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 26 [2021-05-03 15:16:49,608 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2021-05-03 15:16:50,078 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2021-05-03 15:16:50,683 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-05-03 15:16:50,910 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-05-03 15:16:51,294 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-05-03 15:16:51,527 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2021-05-03 15:16:51,822 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-05-03 15:16:53,196 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-05-03 15:16:53,426 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 [2021-05-03 15:16:53,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:16:53,832 INFO L93 Difference]: Finished difference Result 2825 states and 6968 transitions. [2021-05-03 15:16:53,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 15:16:53,835 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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 30 [2021-05-03 15:16:53,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:16:53,838 INFO L225 Difference]: With dead ends: 2825 [2021-05-03 15:16:53,838 INFO L226 Difference]: Without dead ends: 2813 [2021-05-03 15:16:53,838 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 4755.4ms TimeCoverageRelationStatistics Valid=371, Invalid=1351, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 15:16:53,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2813 states. [2021-05-03 15:16:53,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2813 to 1214. [2021-05-03 15:16:53,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 1213 states have (on average 2.403957131079967) internal successors, (2916), 1213 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:16:53,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 2916 transitions. [2021-05-03 15:16:53,853 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 2916 transitions. Word has length 30 [2021-05-03 15:16:53,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:16:53,853 INFO L480 AbstractCegarLoop]: Abstraction has 1214 states and 2916 transitions. [2021-05-03 15:16:53,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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) [2021-05-03 15:16:53,853 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 2916 transitions. [2021-05-03 15:16:53,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:16:53,854 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:16:53,854 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:16:54,054 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable397 [2021-05-03 15:16:54,055 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:16:54,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:16:54,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1351994749, now seen corresponding path program 33 times [2021-05-03 15:16:54,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:16:54,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961699278] [2021-05-03 15:16:54,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:16:54,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:16:54,908 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:16:54,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961699278] [2021-05-03 15:16:54,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597846648] [2021-05-03 15:16:54,908 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:16:54,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 15:16:54,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:16:54,926 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:16:54,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:16:55,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-05-03 15:16:55,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:16:55,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:16:55,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:16:55,508 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-05-03 15:16:55,670 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:16:55,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:16:55,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-05-03 15:16:55,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893717808] [2021-05-03 15:16:55,670 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 15:16:55,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:16:55,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 15:16:55,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:16:55,671 INFO L87 Difference]: Start difference. First operand 1214 states and 2916 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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) [2021-05-03 15:16:56,147 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-05-03 15:16:56,389 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-05-03 15:16:56,614 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2021-05-03 15:16:56,872 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2021-05-03 15:16:57,118 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 [2021-05-03 15:16:57,512 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-05-03 15:16:57,765 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-05-03 15:16:58,054 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 21 [2021-05-03 15:16:58,889 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-05-03 15:16:59,696 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 [2021-05-03 15:17:00,074 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-05-03 15:17:00,647 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-05-03 15:17:01,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:17:01,075 INFO L93 Difference]: Finished difference Result 3133 states and 7680 transitions. [2021-05-03 15:17:01,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 15:17:01,078 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 30 [2021-05-03 15:17:01,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:17:01,082 INFO L225 Difference]: With dead ends: 3133 [2021-05-03 15:17:01,082 INFO L226 Difference]: Without dead ends: 3111 [2021-05-03 15:17:01,082 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 4424.1ms TimeCoverageRelationStatistics Valid=417, Invalid=1563, Unknown=0, NotChecked=0, Total=1980 [2021-05-03 15:17:01,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3111 states. [2021-05-03 15:17:01,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3111 to 1163. [2021-05-03 15:17:01,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1163 states, 1162 states have (on average 2.3907056798623065) internal successors, (2778), 1162 states have internal predecessors, (2778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:17:01,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 2778 transitions. [2021-05-03 15:17:01,098 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 2778 transitions. Word has length 30 [2021-05-03 15:17:01,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:17:01,098 INFO L480 AbstractCegarLoop]: Abstraction has 1163 states and 2778 transitions. [2021-05-03 15:17:01,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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) [2021-05-03 15:17:01,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 2778 transitions. [2021-05-03 15:17:01,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:17:01,099 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:17:01,099 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:17:01,300 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2021-05-03 15:17:01,300 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:17:01,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:17:01,300 INFO L82 PathProgramCache]: Analyzing trace with hash 698605027, now seen corresponding path program 34 times [2021-05-03 15:17:01,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:17:01,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915023639] [2021-05-03 15:17:01,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:17:01,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:17:02,135 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:17:02,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915023639] [2021-05-03 15:17:02,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520356038] [2021-05-03 15:17:02,136 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:17:02,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:17:02,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:17:02,152 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:17:02,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:17:02,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 15:17:02,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:17:02,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:17:02,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:17:02,829 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-05-03 15:17:02,929 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:17:02,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:17:02,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-05-03 15:17:02,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680149514] [2021-05-03 15:17:02,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 15:17:02,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:17:02,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 15:17:02,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:17:02,930 INFO L87 Difference]: Start difference. First operand 1163 states and 2778 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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) [2021-05-03 15:17:03,864 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2021-05-03 15:17:04,263 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-05-03 15:17:04,436 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 [2021-05-03 15:17:05,173 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2021-05-03 15:17:05,379 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-05-03 15:17:06,320 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-05-03 15:17:06,704 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-05-03 15:17:07,006 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-05-03 15:17:07,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:17:07,591 INFO L93 Difference]: Finished difference Result 2630 states and 6391 transitions. [2021-05-03 15:17:07,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 15:17:07,594 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 30 [2021-05-03 15:17:07,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:17:07,597 INFO L225 Difference]: With dead ends: 2630 [2021-05-03 15:17:07,597 INFO L226 Difference]: Without dead ends: 2607 [2021-05-03 15:17:07,597 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 3567.6ms TimeCoverageRelationStatistics Valid=318, Invalid=1088, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 15:17:07,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2607 states. [2021-05-03 15:17:07,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2607 to 1157. [2021-05-03 15:17:07,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1156 states have (on average 2.38840830449827) internal successors, (2761), 1156 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:17:07,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 2761 transitions. [2021-05-03 15:17:07,613 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 2761 transitions. Word has length 30 [2021-05-03 15:17:07,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:17:07,613 INFO L480 AbstractCegarLoop]: Abstraction has 1157 states and 2761 transitions. [2021-05-03 15:17:07,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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) [2021-05-03 15:17:07,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 2761 transitions. [2021-05-03 15:17:07,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:17:07,614 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:17:07,614 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:17:07,815 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable404,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:17:07,815 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:17:07,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:17:07,815 INFO L82 PathProgramCache]: Analyzing trace with hash -614639997, now seen corresponding path program 35 times [2021-05-03 15:17:07,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:17:07,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374211554] [2021-05-03 15:17:07,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:17:07,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:17:08,719 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:17:08,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374211554] [2021-05-03 15:17:08,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457044885] [2021-05-03 15:17:08,720 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:17:08,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 15:17:08,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:17:08,737 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:17:08,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:17:09,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 15:17:09,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:17:09,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:17:09,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:17:09,434 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-05-03 15:17:09,541 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:17:09,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:17:09,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-05-03 15:17:09,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123575815] [2021-05-03 15:17:09,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 15:17:09,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:17:09,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 15:17:09,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:17:09,542 INFO L87 Difference]: Start difference. First operand 1157 states and 2761 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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) [2021-05-03 15:17:10,512 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 [2021-05-03 15:17:10,876 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2021-05-03 15:17:11,735 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-05-03 15:17:12,880 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 23 [2021-05-03 15:17:13,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:17:13,368 INFO L93 Difference]: Finished difference Result 2514 states and 6127 transitions. [2021-05-03 15:17:13,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 15:17:13,372 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 30 [2021-05-03 15:17:13,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:17:13,374 INFO L225 Difference]: With dead ends: 2514 [2021-05-03 15:17:13,375 INFO L226 Difference]: Without dead ends: 2504 [2021-05-03 15:17:13,375 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 2988.3ms TimeCoverageRelationStatistics Valid=239, Invalid=951, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 15:17:13,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2504 states. [2021-05-03 15:17:13,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2504 to 1154. [2021-05-03 15:17:13,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1154 states, 1153 states have (on average 2.388551604509974) internal successors, (2754), 1153 states have internal predecessors, (2754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:17:13,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 2754 transitions. [2021-05-03 15:17:13,388 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 2754 transitions. Word has length 30 [2021-05-03 15:17:13,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:17:13,388 INFO L480 AbstractCegarLoop]: Abstraction has 1154 states and 2754 transitions. [2021-05-03 15:17:13,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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) [2021-05-03 15:17:13,388 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 2754 transitions. [2021-05-03 15:17:13,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:17:13,389 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:17:13,389 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:17:13,590 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:17:13,590 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:17:13,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:17:13,590 INFO L82 PathProgramCache]: Analyzing trace with hash 198282265, now seen corresponding path program 36 times [2021-05-03 15:17:13,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:17:13,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344505404] [2021-05-03 15:17:13,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:17:13,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:17:14,166 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-05-03 15:17:14,364 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-05-03 15:17:14,706 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:17:14,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344505404] [2021-05-03 15:17:14,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201551072] [2021-05-03 15:17:14,706 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:17:14,723 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 15:17:14,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:17:14,724 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 15:17:14,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:17:15,407 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:17:15,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-05-03 15:17:15,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:17:15,608 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-05-03 15:17:15,610 INFO L628 ElimStorePlain]: treesize reduction 8, result has 88.2 percent of original size [2021-05-03 15:17:15,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:17:15,612 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:60 [2021-05-03 15:17:16,017 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:17:16,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:17:16,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2021-05-03 15:17:16,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097218183] [2021-05-03 15:17:16,018 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 15:17:16,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:17:16,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 15:17:16,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2021-05-03 15:17:16,018 INFO L87 Difference]: Start difference. First operand 1154 states and 2754 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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) [2021-05-03 15:17:16,439 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-05-03 15:17:16,710 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-05-03 15:17:17,088 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 28 [2021-05-03 15:17:17,494 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2021-05-03 15:17:18,080 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2021-05-03 15:17:18,330 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2021-05-03 15:17:18,780 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2021-05-03 15:17:19,339 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-05-03 15:17:19,962 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2021-05-03 15:17:20,441 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-05-03 15:17:20,848 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2021-05-03 15:17:21,553 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-03 15:17:21,724 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 27 [2021-05-03 15:17:22,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:17:22,851 INFO L93 Difference]: Finished difference Result 2535 states and 6188 transitions. [2021-05-03 15:17:22,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-03 15:17:22,854 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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 30 [2021-05-03 15:17:22,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:17:22,857 INFO L225 Difference]: With dead ends: 2535 [2021-05-03 15:17:22,857 INFO L226 Difference]: Without dead ends: 2524 [2021-05-03 15:17:22,858 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 5793.6ms TimeCoverageRelationStatistics Valid=355, Invalid=1537, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 15:17:22,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2524 states. [2021-05-03 15:17:22,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2524 to 1176. [2021-05-03 15:17:22,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1175 states have (on average 2.3940425531914893) internal successors, (2813), 1175 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:17:22,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 2813 transitions. [2021-05-03 15:17:22,873 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 2813 transitions. Word has length 30 [2021-05-03 15:17:22,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:17:22,873 INFO L480 AbstractCegarLoop]: Abstraction has 1176 states and 2813 transitions. [2021-05-03 15:17:22,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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) [2021-05-03 15:17:22,873 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 2813 transitions. [2021-05-03 15:17:22,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:17:22,874 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:17:22,874 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:17:23,074 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:17:23,075 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:17:23,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:17:23,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1954683315, now seen corresponding path program 37 times [2021-05-03 15:17:23,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:17:23,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645782518] [2021-05-03 15:17:23,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:17:23,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:17:23,283 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2021-05-03 15:17:23,675 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-05-03 15:17:23,881 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-05-03 15:17:24,245 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:17:24,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645782518] [2021-05-03 15:17:24,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833605743] [2021-05-03 15:17:24,245 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:17:24,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:17:24,262 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:17:24,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:17:24,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-05-03 15:17:24,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:17:24,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:17:24,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:17:24,950 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-05-03 15:17:25,084 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:17:25,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:17:25,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-05-03 15:17:25,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626163966] [2021-05-03 15:17:25,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 15:17:25,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:17:25,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 15:17:25,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:17:25,085 INFO L87 Difference]: Start difference. First operand 1176 states and 2813 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) [2021-05-03 15:17:25,638 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-05-03 15:17:25,929 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-05-03 15:17:26,524 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2021-05-03 15:17:27,008 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-05-03 15:17:27,502 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2021-05-03 15:17:28,437 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-05-03 15:17:28,995 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-05-03 15:17:29,290 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-05-03 15:17:29,495 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 Received shutdown request... [2021-05-03 15:17:29,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 15:17:29,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:17:29,875 WARN L545 AbstractCegarLoop]: Verification canceled [2021-05-03 15:17:29,879 WARN L224 ceAbstractionStarter]: Timeout [2021-05-03 15:17:29,879 INFO L202 PluginConnector]: Adding new model misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 03:17:29 BasicIcfg [2021-05-03 15:17:29,879 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 15:17:29,879 INFO L168 Benchmark]: Toolchain (without parser) took 846740.58 ms. Allocated memory was 339.7 MB in the beginning and 515.9 MB in the end (delta: 176.2 MB). Free memory was 319.0 MB in the beginning and 270.7 MB in the end (delta: 48.3 MB). Peak memory consumption was 227.1 MB. Max. memory is 16.0 GB. [2021-05-03 15:17:29,879 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 339.7 MB. Free memory was 320.2 MB in the beginning and 320.1 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 15:17:29,879 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.02 ms. Allocated memory is still 339.7 MB. Free memory was 318.9 MB in the beginning and 317.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 15:17:29,880 INFO L168 Benchmark]: Boogie Preprocessor took 16.58 ms. Allocated memory is still 339.7 MB. Free memory was 317.5 MB in the beginning and 316.5 MB in the end (delta: 981.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-03 15:17:29,880 INFO L168 Benchmark]: RCFGBuilder took 281.81 ms. Allocated memory is still 339.7 MB. Free memory was 316.4 MB in the beginning and 304.8 MB in the end (delta: 11.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-05-03 15:17:29,880 INFO L168 Benchmark]: TraceAbstraction took 846411.79 ms. Allocated memory was 339.7 MB in the beginning and 515.9 MB in the end (delta: 176.2 MB). Free memory was 304.4 MB in the beginning and 270.7 MB in the end (delta: 33.7 MB). Peak memory consumption was 212.5 MB. Max. memory is 16.0 GB. [2021-05-03 15:17:29,880 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 0.14 ms. Allocated memory is still 339.7 MB. Free memory was 320.2 MB in the beginning and 320.1 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.02 ms. Allocated memory is still 339.7 MB. Free memory was 318.9 MB in the beginning and 317.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 16.58 ms. Allocated memory is still 339.7 MB. Free memory was 317.5 MB in the beginning and 316.5 MB in the end (delta: 981.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 281.81 ms. Allocated memory is still 339.7 MB. Free memory was 316.4 MB in the beginning and 304.8 MB in the end (delta: 11.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 846411.79 ms. Allocated memory was 339.7 MB in the beginning and 515.9 MB in the end (delta: 176.2 MB). Free memory was 304.4 MB in the beginning and 270.7 MB in the end (delta: 33.7 MB). Peak memory consumption was 212.5 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 65]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 65). Cancelled while BasicCegarLoop was constructing difference of abstraction (1176states) and FLOYD_HOARE automaton (currently 26 states, 21 states before enhancement),while ReachableStatesComputation was computing reachable states (472 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 846315.4ms, OverallIterations: 164, TraceHistogramMax: 2, EmptinessCheckTime: 225.0ms, AutomataDifference: 618102.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 37.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4572 SDtfs, 40371 SDslu, 36537 SDs, 0 SdLazy, 183227 SolverSat, 19617 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 123830.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9725 GetRequests, 3251 SyntacticMatches, 529 SemanticMatches, 5945 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69052 ImplicationChecksByTransitivity, 463439.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1214occurred in iteration=159, InterpolantAutomatonStates: 4693, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 2839.4ms AutomataMinimizationTime, 163 MinimizatonAttempts, 207936 StatesRemovedByMinimization, 163 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 514.0ms SsaConstructionTime, 1663.1ms SatisfiabilityAnalysisTime, 186894.6ms InterpolantComputationTime, 9324 NumberOfCodeBlocks, 9318 NumberOfCodeBlocksAsserted, 565 NumberOfCheckSat, 8998 ConstructedInterpolants, 83 QuantifiedInterpolants, 191206 SizeOfPredicates, 1144 NumberOfNonLiveVariables, 9662 ConjunctsInSsa, 4589 ConjunctsInUnsatCore, 326 InterpolantComputations, 2 PerfectInterpolantSequences, 89/3503 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