/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label28.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:08:56,345 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:08:56,347 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:08:56,361 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:08:56,371 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:08:56,372 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:08:56,373 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:08:56,374 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:08:56,375 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:08:56,376 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:08:56,380 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:08:56,381 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:08:56,385 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:08:56,388 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:08:56,389 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:08:56,390 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:08:56,395 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:08:56,407 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:08:56,408 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:08:56,408 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:08:56,409 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 19:08:56,424 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:08:56,425 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:08:56,426 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:08:56,426 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:08:56,426 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:08:56,426 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:08:56,427 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:08:56,427 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:08:56,427 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:08:56,428 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:08:56,429 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:08:56,429 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:08:56,429 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:08:56,429 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:08:56,429 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:08:56,430 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:08:56,430 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:08:56,430 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:08:56,430 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:08:56,430 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:08:56,430 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:08:56,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:08:56,431 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:08:56,431 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:08:56,431 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:08:56,431 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:08:56,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:08:56,432 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:08:56,432 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:08:56,720 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:08:56,732 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:08:56,736 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:08:56,737 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:08:56,738 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:08:56,739 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label28.c [2019-11-06 19:08:56,800 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d78283ff/4a8a47b8cc624f4985068ae525c4dab6/FLAG451b1353c [2019-11-06 19:08:57,423 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:08:57,424 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label28.c [2019-11-06 19:08:57,439 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d78283ff/4a8a47b8cc624f4985068ae525c4dab6/FLAG451b1353c [2019-11-06 19:08:57,678 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d78283ff/4a8a47b8cc624f4985068ae525c4dab6 [2019-11-06 19:08:57,688 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:08:57,692 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:08:57,694 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:08:57,695 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:08:57,698 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:08:57,699 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:08:57" (1/1) ... [2019-11-06 19:08:57,703 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54bb6488 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:57, skipping insertion in model container [2019-11-06 19:08:57,703 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:08:57" (1/1) ... [2019-11-06 19:08:57,712 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:08:57,772 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:08:58,390 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:08:58,400 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:08:58,679 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:08:58,704 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:08:58,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:58 WrapperNode [2019-11-06 19:08:58,705 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:08:58,706 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:08:58,706 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:08:58,707 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:08:58,729 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:58" (1/1) ... [2019-11-06 19:08:58,729 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:58" (1/1) ... [2019-11-06 19:08:58,780 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:58" (1/1) ... [2019-11-06 19:08:58,780 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:58" (1/1) ... [2019-11-06 19:08:58,879 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:58" (1/1) ... [2019-11-06 19:08:58,909 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:58" (1/1) ... [2019-11-06 19:08:58,935 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:58" (1/1) ... [2019-11-06 19:08:58,950 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:08:58,951 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:08:58,951 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:08:58,951 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:08:58,953 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:58" (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 [2019-11-06 19:08:59,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:08:59,029 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:08:59,029 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:08:59,029 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:08:59,029 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:08:59,030 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:08:59,030 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:08:59,030 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:08:59,030 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:08:59,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:08:59,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:09:00,646 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:09:00,646 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:09:00,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:09:00 BoogieIcfgContainer [2019-11-06 19:09:00,648 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:09:00,650 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:09:00,650 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:09:00,653 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:09:00,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:08:57" (1/3) ... [2019-11-06 19:09:00,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62fa3207 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:09:00, skipping insertion in model container [2019-11-06 19:09:00,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:58" (2/3) ... [2019-11-06 19:09:00,656 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62fa3207 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:09:00, skipping insertion in model container [2019-11-06 19:09:00,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:09:00" (3/3) ... [2019-11-06 19:09:00,658 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label28.c [2019-11-06 19:09:00,669 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:09:00,679 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:09:00,692 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:09:00,752 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:09:00,753 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:09:00,753 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:09:00,753 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:09:00,753 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:09:00,753 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:09:00,753 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:09:00,753 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:09:00,780 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-11-06 19:09:00,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-06 19:09:00,790 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:09:00,791 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:09:00,794 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:09:00,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:09:00,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1610348989, now seen corresponding path program 1 times [2019-11-06 19:09:00,810 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:09:00,810 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797769421] [2019-11-06 19:09:00,810 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:09:01,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:01,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:01,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:09:01,311 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797769421] [2019-11-06 19:09:01,313 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:09:01,313 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:09:01,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660479742] [2019-11-06 19:09:01,326 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:09:01,326 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:09:01,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:09:01,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:09:01,350 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 5 states. [2019-11-06 19:09:04,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:09:04,856 INFO L93 Difference]: Finished difference Result 990 states and 1774 transitions. [2019-11-06 19:09:04,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:09:04,858 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2019-11-06 19:09:04,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:09:04,880 INFO L225 Difference]: With dead ends: 990 [2019-11-06 19:09:04,880 INFO L226 Difference]: Without dead ends: 629 [2019-11-06 19:09:04,890 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:09:04,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2019-11-06 19:09:04,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 625. [2019-11-06 19:09:04,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 625 states. [2019-11-06 19:09:04,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 865 transitions. [2019-11-06 19:09:04,987 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 865 transitions. Word has length 54 [2019-11-06 19:09:04,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:09:04,988 INFO L462 AbstractCegarLoop]: Abstraction has 625 states and 865 transitions. [2019-11-06 19:09:04,988 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:09:04,988 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 865 transitions. [2019-11-06 19:09:05,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-11-06 19:09:05,000 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:09:05,001 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:09:05,001 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:09:05,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:09:05,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1973618443, now seen corresponding path program 1 times [2019-11-06 19:09:05,003 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:09:05,004 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322593399] [2019-11-06 19:09:05,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:09:05,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:05,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:05,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:05,350 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 46 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:09:05,350 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322593399] [2019-11-06 19:09:05,351 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95766239] [2019-11-06 19:09:05,351 INFO L94 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 [2019-11-06 19:09:05,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:05,444 INFO L256 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:09:05,453 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:09:05,540 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:09:05,540 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:09:05,540 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:09:05,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942426069] [2019-11-06 19:09:05,545 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:09:05,546 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:09:05,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:09:05,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:09:05,546 INFO L87 Difference]: Start difference. First operand 625 states and 865 transitions. Second operand 3 states. [2019-11-06 19:09:06,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:09:06,651 INFO L93 Difference]: Finished difference Result 1826 states and 2564 transitions. [2019-11-06 19:09:06,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:09:06,652 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 127 [2019-11-06 19:09:06,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:09:06,660 INFO L225 Difference]: With dead ends: 1826 [2019-11-06 19:09:06,660 INFO L226 Difference]: Without dead ends: 1207 [2019-11-06 19:09:06,663 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:09:06,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1207 states. [2019-11-06 19:09:06,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 1197. [2019-11-06 19:09:06,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1197 states. [2019-11-06 19:09:06,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 1562 transitions. [2019-11-06 19:09:06,726 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 1562 transitions. Word has length 127 [2019-11-06 19:09:06,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:09:06,727 INFO L462 AbstractCegarLoop]: Abstraction has 1197 states and 1562 transitions. [2019-11-06 19:09:06,727 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:09:06,727 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 1562 transitions. [2019-11-06 19:09:06,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-11-06 19:09:06,732 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:09:06,733 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:09:06,939 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:09:06,943 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:09:06,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:09:06,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1882924734, now seen corresponding path program 1 times [2019-11-06 19:09:06,945 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:09:06,945 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546097473] [2019-11-06 19:09:06,945 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:09:06,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:07,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:07,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:07,220 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 46 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:09:07,220 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546097473] [2019-11-06 19:09:07,220 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022921196] [2019-11-06 19:09:07,221 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-06 19:09:07,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:07,323 INFO L256 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:09:07,350 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:09:07,398 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:09:07,398 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:09:07,398 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:09:07,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429883714] [2019-11-06 19:09:07,401 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:09:07,408 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:09:07,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:09:07,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:09:07,411 INFO L87 Difference]: Start difference. First operand 1197 states and 1562 transitions. Second operand 3 states. [2019-11-06 19:09:08,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:09:08,406 INFO L93 Difference]: Finished difference Result 2970 states and 3983 transitions. [2019-11-06 19:09:08,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:09:08,407 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 128 [2019-11-06 19:09:08,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:09:08,418 INFO L225 Difference]: With dead ends: 2970 [2019-11-06 19:09:08,418 INFO L226 Difference]: Without dead ends: 1779 [2019-11-06 19:09:08,422 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:09:08,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1779 states. [2019-11-06 19:09:08,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1779 to 1769. [2019-11-06 19:09:08,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1769 states. [2019-11-06 19:09:08,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1769 states to 1769 states and 2354 transitions. [2019-11-06 19:09:08,476 INFO L78 Accepts]: Start accepts. Automaton has 1769 states and 2354 transitions. Word has length 128 [2019-11-06 19:09:08,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:09:08,477 INFO L462 AbstractCegarLoop]: Abstraction has 1769 states and 2354 transitions. [2019-11-06 19:09:08,477 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:09:08,477 INFO L276 IsEmpty]: Start isEmpty. Operand 1769 states and 2354 transitions. [2019-11-06 19:09:08,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-11-06 19:09:08,481 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:09:08,481 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:09:08,685 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:09:08,691 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:09:08,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:09:08,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1199392174, now seen corresponding path program 1 times [2019-11-06 19:09:08,692 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:09:08,692 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553636840] [2019-11-06 19:09:08,692 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:09:08,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:08,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:08,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:09,004 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:09:09,004 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553636840] [2019-11-06 19:09:09,005 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:09:09,005 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 19:09:09,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439142430] [2019-11-06 19:09:09,006 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:09:09,006 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:09:09,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:09:09,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:09:09,007 INFO L87 Difference]: Start difference. First operand 1769 states and 2354 transitions. Second operand 8 states. [2019-11-06 19:09:11,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:09:11,879 INFO L93 Difference]: Finished difference Result 4940 states and 6805 transitions. [2019-11-06 19:09:11,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 19:09:11,880 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 134 [2019-11-06 19:09:11,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:09:11,899 INFO L225 Difference]: With dead ends: 4940 [2019-11-06 19:09:11,899 INFO L226 Difference]: Without dead ends: 3177 [2019-11-06 19:09:11,905 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:09:11,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3177 states. [2019-11-06 19:09:12,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3177 to 3160. [2019-11-06 19:09:12,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3160 states. [2019-11-06 19:09:12,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3160 states to 3160 states and 4065 transitions. [2019-11-06 19:09:12,020 INFO L78 Accepts]: Start accepts. Automaton has 3160 states and 4065 transitions. Word has length 134 [2019-11-06 19:09:12,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:09:12,021 INFO L462 AbstractCegarLoop]: Abstraction has 3160 states and 4065 transitions. [2019-11-06 19:09:12,021 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:09:12,021 INFO L276 IsEmpty]: Start isEmpty. Operand 3160 states and 4065 transitions. [2019-11-06 19:09:12,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2019-11-06 19:09:12,029 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:09:12,029 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:09:12,031 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:09:12,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:09:12,032 INFO L82 PathProgramCache]: Analyzing trace with hash -10605268, now seen corresponding path program 1 times [2019-11-06 19:09:12,032 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:09:12,032 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484384093] [2019-11-06 19:09:12,033 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:09:12,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:12,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:12,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:12,358 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 43 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:09:12,359 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484384093] [2019-11-06 19:09:12,359 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789741350] [2019-11-06 19:09:12,359 INFO L94 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 [2019-11-06 19:09:12,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:12,474 INFO L256 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:09:12,488 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:09:12,545 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:09:12,546 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:09:12,546 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2019-11-06 19:09:12,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785034777] [2019-11-06 19:09:12,547 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:09:12,547 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:09:12,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:09:12,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:09:12,548 INFO L87 Difference]: Start difference. First operand 3160 states and 4065 transitions. Second operand 3 states. [2019-11-06 19:09:13,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:09:13,614 INFO L93 Difference]: Finished difference Result 6897 states and 9088 transitions. [2019-11-06 19:09:13,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:09:13,614 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 185 [2019-11-06 19:09:13,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:09:13,638 INFO L225 Difference]: With dead ends: 6897 [2019-11-06 19:09:13,638 INFO L226 Difference]: Without dead ends: 3931 [2019-11-06 19:09:13,683 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:09:13,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3931 states. [2019-11-06 19:09:13,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3931 to 3360. [2019-11-06 19:09:13,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3360 states. [2019-11-06 19:09:13,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3360 states to 3360 states and 4432 transitions. [2019-11-06 19:09:13,791 INFO L78 Accepts]: Start accepts. Automaton has 3360 states and 4432 transitions. Word has length 185 [2019-11-06 19:09:13,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:09:13,792 INFO L462 AbstractCegarLoop]: Abstraction has 3360 states and 4432 transitions. [2019-11-06 19:09:13,792 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:09:13,792 INFO L276 IsEmpty]: Start isEmpty. Operand 3360 states and 4432 transitions. [2019-11-06 19:09:13,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2019-11-06 19:09:13,797 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:09:13,798 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:09:14,002 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:09:14,002 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:09:14,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:09:14,003 INFO L82 PathProgramCache]: Analyzing trace with hash -91916028, now seen corresponding path program 1 times [2019-11-06 19:09:14,003 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:09:14,003 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276205311] [2019-11-06 19:09:14,003 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:09:14,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:14,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:14,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:14,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:14,451 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 66 proven. 100 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:09:14,452 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276205311] [2019-11-06 19:09:14,452 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011197520] [2019-11-06 19:09:14,452 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-06 19:09:14,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:14,550 INFO L256 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 19:09:14,560 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:09:14,614 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:09:14,807 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-11-06 19:09:14,807 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:09:14,807 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 15 [2019-11-06 19:09:14,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056015488] [2019-11-06 19:09:14,808 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:09:14,809 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:09:14,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:09:14,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2019-11-06 19:09:14,809 INFO L87 Difference]: Start difference. First operand 3360 states and 4432 transitions. Second operand 5 states. [2019-11-06 19:09:16,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:09:16,886 INFO L93 Difference]: Finished difference Result 6980 states and 9288 transitions. [2019-11-06 19:09:16,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:09:16,887 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 207 [2019-11-06 19:09:16,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:09:16,905 INFO L225 Difference]: With dead ends: 6980 [2019-11-06 19:09:16,906 INFO L226 Difference]: Without dead ends: 3626 [2019-11-06 19:09:16,915 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2019-11-06 19:09:16,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3626 states. [2019-11-06 19:09:17,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3626 to 3583. [2019-11-06 19:09:17,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3583 states. [2019-11-06 19:09:17,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3583 states to 3583 states and 4700 transitions. [2019-11-06 19:09:17,013 INFO L78 Accepts]: Start accepts. Automaton has 3583 states and 4700 transitions. Word has length 207 [2019-11-06 19:09:17,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:09:17,014 INFO L462 AbstractCegarLoop]: Abstraction has 3583 states and 4700 transitions. [2019-11-06 19:09:17,014 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:09:17,014 INFO L276 IsEmpty]: Start isEmpty. Operand 3583 states and 4700 transitions. [2019-11-06 19:09:17,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2019-11-06 19:09:17,019 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:09:17,019 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:09:17,223 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:09:17,223 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:09:17,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:09:17,224 INFO L82 PathProgramCache]: Analyzing trace with hash 563951691, now seen corresponding path program 1 times [2019-11-06 19:09:17,225 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:09:17,225 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819256116] [2019-11-06 19:09:17,225 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:09:17,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:17,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:17,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:17,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:17,692 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-06 19:09:17,692 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819256116] [2019-11-06 19:09:17,693 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006205720] [2019-11-06 19:09:17,693 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:09:17,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:17,794 INFO L256 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:09:17,798 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:09:17,826 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:09:17,882 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 172 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:09:17,883 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:09:17,883 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 12 [2019-11-06 19:09:17,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399404524] [2019-11-06 19:09:17,884 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 19:09:17,885 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:09:17,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 19:09:17,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:09:17,885 INFO L87 Difference]: Start difference. First operand 3583 states and 4700 transitions. Second operand 12 states. [2019-11-06 19:09:27,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:09:27,761 INFO L93 Difference]: Finished difference Result 11996 states and 17253 transitions. [2019-11-06 19:09:27,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-11-06 19:09:27,761 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 250 [2019-11-06 19:09:27,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:09:27,800 INFO L225 Difference]: With dead ends: 11996 [2019-11-06 19:09:27,800 INFO L226 Difference]: Without dead ends: 8419 [2019-11-06 19:09:27,813 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=515, Invalid=2791, Unknown=0, NotChecked=0, Total=3306 [2019-11-06 19:09:27,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8419 states. [2019-11-06 19:09:28,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8419 to 8106. [2019-11-06 19:09:28,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8106 states. [2019-11-06 19:09:28,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8106 states to 8106 states and 10240 transitions. [2019-11-06 19:09:28,044 INFO L78 Accepts]: Start accepts. Automaton has 8106 states and 10240 transitions. Word has length 250 [2019-11-06 19:09:28,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:09:28,045 INFO L462 AbstractCegarLoop]: Abstraction has 8106 states and 10240 transitions. [2019-11-06 19:09:28,045 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 19:09:28,045 INFO L276 IsEmpty]: Start isEmpty. Operand 8106 states and 10240 transitions. [2019-11-06 19:09:28,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2019-11-06 19:09:28,057 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:09:28,057 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:09:28,261 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:09:28,261 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:09:28,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:09:28,262 INFO L82 PathProgramCache]: Analyzing trace with hash 11397960, now seen corresponding path program 1 times [2019-11-06 19:09:28,262 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:09:28,262 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292797514] [2019-11-06 19:09:28,262 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:09:28,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:28,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:28,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:28,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:28,622 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 95 proven. 2 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2019-11-06 19:09:28,623 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292797514] [2019-11-06 19:09:28,623 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723992841] [2019-11-06 19:09:28,624 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-06 19:09:28,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:28,739 INFO L256 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:09:28,745 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:09:28,850 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 151 proven. 46 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 19:09:28,850 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:09:28,851 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-11-06 19:09:28,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723010911] [2019-11-06 19:09:28,852 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 19:09:28,852 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:09:28,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 19:09:28,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:09:28,858 INFO L87 Difference]: Start difference. First operand 8106 states and 10240 transitions. Second operand 7 states. [2019-11-06 19:09:31,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:09:31,473 INFO L93 Difference]: Finished difference Result 22553 states and 30724 transitions. [2019-11-06 19:09:31,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 19:09:31,478 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 292 [2019-11-06 19:09:31,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:09:31,568 INFO L225 Difference]: With dead ends: 22553 [2019-11-06 19:09:31,568 INFO L226 Difference]: Without dead ends: 14453 [2019-11-06 19:09:31,600 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:09:31,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14453 states. [2019-11-06 19:09:32,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14453 to 12542. [2019-11-06 19:09:32,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12542 states. [2019-11-06 19:09:32,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12542 states to 12542 states and 16071 transitions. [2019-11-06 19:09:32,035 INFO L78 Accepts]: Start accepts. Automaton has 12542 states and 16071 transitions. Word has length 292 [2019-11-06 19:09:32,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:09:32,036 INFO L462 AbstractCegarLoop]: Abstraction has 12542 states and 16071 transitions. [2019-11-06 19:09:32,036 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 19:09:32,037 INFO L276 IsEmpty]: Start isEmpty. Operand 12542 states and 16071 transitions. [2019-11-06 19:09:32,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2019-11-06 19:09:32,053 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:09:32,054 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:09:32,267 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:09:32,268 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:09:32,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:09:32,268 INFO L82 PathProgramCache]: Analyzing trace with hash -777562786, now seen corresponding path program 1 times [2019-11-06 19:09:32,269 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:09:32,269 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681150982] [2019-11-06 19:09:32,269 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:09:32,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:32,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:32,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:32,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:33,412 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 220 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:09:33,413 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681150982] [2019-11-06 19:09:33,413 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107075703] [2019-11-06 19:09:33,413 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:09:33,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:33,535 INFO L256 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 19:09:33,541 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:09:33,661 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 221 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:09:33,661 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:09:33,662 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 5] total 18 [2019-11-06 19:09:33,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744859275] [2019-11-06 19:09:33,666 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-06 19:09:33,666 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:09:33,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-06 19:09:33,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2019-11-06 19:09:33,667 INFO L87 Difference]: Start difference. First operand 12542 states and 16071 transitions. Second operand 18 states.