/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/Problem16_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:16:59,717 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:16:59,719 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:16:59,732 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:16:59,751 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:16:59,752 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:16:59,753 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:16:59,754 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:16:59,755 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:16:59,755 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:16:59,757 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:16:59,760 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:16:59,761 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:16:59,762 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:16:59,763 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:16:59,766 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:16:59,769 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:16:59,782 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:16:59,783 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:16:59,784 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:16:59,785 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 19:16:59,809 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:16:59,809 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:16:59,811 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:16:59,811 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:16:59,811 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:16:59,811 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:16:59,812 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:16:59,812 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:16:59,812 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:16:59,812 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:16:59,813 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:16:59,813 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:16:59,814 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:16:59,814 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:16:59,814 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:16:59,814 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:16:59,815 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:16:59,815 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:16:59,815 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:16:59,815 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:16:59,816 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:16:59,816 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:16:59,816 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:16:59,816 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:16:59,816 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:16:59,816 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:16:59,817 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:16:59,817 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:16:59,817 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:17:00,086 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:17:00,097 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:17:00,102 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:17:00,103 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:17:00,103 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:17:00,104 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label09.c [2019-11-06 19:17:00,177 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/845bd0aaa/f52d687e10b141ad9b34c4897aa35727/FLAG117170e0a [2019-11-06 19:17:00,825 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:17:00,826 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label09.c [2019-11-06 19:17:00,845 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/845bd0aaa/f52d687e10b141ad9b34c4897aa35727/FLAG117170e0a [2019-11-06 19:17:01,020 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/845bd0aaa/f52d687e10b141ad9b34c4897aa35727 [2019-11-06 19:17:01,031 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:17:01,032 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:17:01,033 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:17:01,034 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:17:01,037 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:17:01,038 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:17:01" (1/1) ... [2019-11-06 19:17:01,041 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d9f32a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:01, skipping insertion in model container [2019-11-06 19:17:01,041 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:17:01" (1/1) ... [2019-11-06 19:17:01,048 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:17:01,126 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:17:01,881 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:17:01,897 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:17:02,250 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:17:02,278 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:17:02,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:02 WrapperNode [2019-11-06 19:17:02,280 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:17:02,281 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:17:02,282 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:17:02,282 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:17:02,304 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:02" (1/1) ... [2019-11-06 19:17:02,304 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:02" (1/1) ... [2019-11-06 19:17:02,357 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:02" (1/1) ... [2019-11-06 19:17:02,358 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:02" (1/1) ... [2019-11-06 19:17:02,422 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:02" (1/1) ... [2019-11-06 19:17:02,448 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:02" (1/1) ... [2019-11-06 19:17:02,466 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:02" (1/1) ... [2019-11-06 19:17:02,482 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:17:02,483 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:17:02,483 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:17:02,483 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:17:02,484 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:02" (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 19:17:02,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:17:02,552 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:17:02,552 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:17:02,552 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:17:02,552 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:17:02,553 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:17:02,553 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:17:02,553 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:17:02,554 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:17:02,554 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:17:02,554 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:17:02,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:17:02,555 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:17:05,135 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:17:05,135 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:17:05,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:17:05 BoogieIcfgContainer [2019-11-06 19:17:05,137 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:17:05,138 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:17:05,138 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:17:05,142 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:17:05,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:17:01" (1/3) ... [2019-11-06 19:17:05,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b143694 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:17:05, skipping insertion in model container [2019-11-06 19:17:05,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:02" (2/3) ... [2019-11-06 19:17:05,144 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b143694 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:17:05, skipping insertion in model container [2019-11-06 19:17:05,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:17:05" (3/3) ... [2019-11-06 19:17:05,146 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label09.c [2019-11-06 19:17:05,156 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:17:05,165 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:17:05,177 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:17:05,206 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:17:05,206 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:17:05,206 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:17:05,206 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:17:05,207 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:17:05,207 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:17:05,207 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:17:05,207 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:17:05,236 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-11-06 19:17:05,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-06 19:17:05,245 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:17:05,246 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] [2019-11-06 19:17:05,249 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:17:05,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:17:05,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1688658390, now seen corresponding path program 1 times [2019-11-06 19:17:05,264 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:17:05,265 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470878556] [2019-11-06 19:17:05,265 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:17:05,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:05,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:05,703 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 19:17:05,704 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470878556] [2019-11-06 19:17:05,705 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:17:05,705 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:17:05,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102476075] [2019-11-06 19:17:05,714 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:17:05,715 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:17:05,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:17:05,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:17:05,732 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-11-06 19:17:11,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:17:11,443 INFO L93 Difference]: Finished difference Result 1515 states and 2850 transitions. [2019-11-06 19:17:11,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:17:11,445 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2019-11-06 19:17:11,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:17:11,469 INFO L225 Difference]: With dead ends: 1515 [2019-11-06 19:17:11,469 INFO L226 Difference]: Without dead ends: 1038 [2019-11-06 19:17:11,481 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:17:11,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-11-06 19:17:11,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-11-06 19:17:11,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-11-06 19:17:11,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1619 transitions. [2019-11-06 19:17:11,606 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1619 transitions. Word has length 53 [2019-11-06 19:17:11,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:17:11,606 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1619 transitions. [2019-11-06 19:17:11,607 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:17:11,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1619 transitions. [2019-11-06 19:17:11,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-11-06 19:17:11,614 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:17:11,614 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, 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 19:17:11,615 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:17:11,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:17:11,615 INFO L82 PathProgramCache]: Analyzing trace with hash -192851661, now seen corresponding path program 1 times [2019-11-06 19:17:11,616 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:17:11,616 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953137755] [2019-11-06 19:17:11,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:17:11,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:11,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:11,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:11,934 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:17:11,934 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953137755] [2019-11-06 19:17:11,934 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:17:11,935 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:17:11,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761213196] [2019-11-06 19:17:11,937 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:17:11,938 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:17:11,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:17:11,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:17:11,938 INFO L87 Difference]: Start difference. First operand 1031 states and 1619 transitions. Second operand 9 states. [2019-11-06 19:17:16,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:17:16,744 INFO L93 Difference]: Finished difference Result 3118 states and 4964 transitions. [2019-11-06 19:17:16,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 19:17:16,745 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 136 [2019-11-06 19:17:16,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:17:16,759 INFO L225 Difference]: With dead ends: 3118 [2019-11-06 19:17:16,760 INFO L226 Difference]: Without dead ends: 2093 [2019-11-06 19:17:16,765 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:17:16,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2093 states. [2019-11-06 19:17:16,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2093 to 2075. [2019-11-06 19:17:16,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2075 states. [2019-11-06 19:17:16,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2075 states to 2075 states and 2956 transitions. [2019-11-06 19:17:16,891 INFO L78 Accepts]: Start accepts. Automaton has 2075 states and 2956 transitions. Word has length 136 [2019-11-06 19:17:16,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:17:16,895 INFO L462 AbstractCegarLoop]: Abstraction has 2075 states and 2956 transitions. [2019-11-06 19:17:16,895 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:17:16,895 INFO L276 IsEmpty]: Start isEmpty. Operand 2075 states and 2956 transitions. [2019-11-06 19:17:16,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-11-06 19:17:16,910 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:17:16,910 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, 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 19:17:16,911 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:17:16,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:17:16,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1084580230, now seen corresponding path program 1 times [2019-11-06 19:17:16,912 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:17:16,913 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869029295] [2019-11-06 19:17:16,913 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:17:17,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:17,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:17,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:17,264 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 42 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 19:17:17,266 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869029295] [2019-11-06 19:17:17,266 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261022475] [2019-11-06 19:17:17,267 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 19:17:17,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:17,359 INFO L256 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:17:17,378 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:17:17,451 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:17:17,452 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:17:17,453 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2019-11-06 19:17:17,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321464073] [2019-11-06 19:17:17,459 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:17:17,460 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:17:17,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:17:17,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:17:17,461 INFO L87 Difference]: Start difference. First operand 2075 states and 2956 transitions. Second operand 3 states. [2019-11-06 19:17:19,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:17:19,582 INFO L93 Difference]: Finished difference Result 3102 states and 4277 transitions. [2019-11-06 19:17:19,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:17:19,584 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 153 [2019-11-06 19:17:19,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:17:19,604 INFO L225 Difference]: With dead ends: 3102 [2019-11-06 19:17:19,604 INFO L226 Difference]: Without dead ends: 3100 [2019-11-06 19:17:19,606 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:17:19,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3100 states. [2019-11-06 19:17:19,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3100 to 2755. [2019-11-06 19:17:19,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2755 states. [2019-11-06 19:17:19,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2755 states to 2755 states and 3884 transitions. [2019-11-06 19:17:19,706 INFO L78 Accepts]: Start accepts. Automaton has 2755 states and 3884 transitions. Word has length 153 [2019-11-06 19:17:19,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:17:19,708 INFO L462 AbstractCegarLoop]: Abstraction has 2755 states and 3884 transitions. [2019-11-06 19:17:19,708 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:17:19,708 INFO L276 IsEmpty]: Start isEmpty. Operand 2755 states and 3884 transitions. [2019-11-06 19:17:19,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2019-11-06 19:17:19,713 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:17:19,713 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, 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] [2019-11-06 19:17:19,917 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:17:19,917 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:17:19,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:17:19,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1887084183, now seen corresponding path program 1 times [2019-11-06 19:17:19,919 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:17:19,919 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339136317] [2019-11-06 19:17:19,919 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:17:19,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:20,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:20,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:20,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:20,373 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 186 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 19:17:20,373 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339136317] [2019-11-06 19:17:20,374 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533418710] [2019-11-06 19:17:20,374 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 19:17:20,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:20,484 INFO L256 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:17:20,491 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:17:20,635 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 190 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:17:20,636 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:17:20,636 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-11-06 19:17:20,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094585917] [2019-11-06 19:17:20,637 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 19:17:20,638 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:17:20,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 19:17:20,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:17:20,638 INFO L87 Difference]: Start difference. First operand 2755 states and 3884 transitions. Second operand 12 states. [2019-11-06 19:17:27,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:17:27,805 INFO L93 Difference]: Finished difference Result 7991 states and 11355 transitions. [2019-11-06 19:17:27,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-06 19:17:27,806 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 268 [2019-11-06 19:17:27,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:17:27,836 INFO L225 Difference]: With dead ends: 7991 [2019-11-06 19:17:27,836 INFO L226 Difference]: Without dead ends: 5242 [2019-11-06 19:17:27,844 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 275 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=256, Invalid=866, Unknown=0, NotChecked=0, Total=1122 [2019-11-06 19:17:27,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5242 states. [2019-11-06 19:17:27,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5242 to 4510. [2019-11-06 19:17:27,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4510 states. [2019-11-06 19:17:27,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4510 states to 4510 states and 5583 transitions. [2019-11-06 19:17:27,967 INFO L78 Accepts]: Start accepts. Automaton has 4510 states and 5583 transitions. Word has length 268 [2019-11-06 19:17:27,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:17:27,969 INFO L462 AbstractCegarLoop]: Abstraction has 4510 states and 5583 transitions. [2019-11-06 19:17:27,969 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 19:17:27,970 INFO L276 IsEmpty]: Start isEmpty. Operand 4510 states and 5583 transitions. [2019-11-06 19:17:27,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 623 [2019-11-06 19:17:27,987 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:17:27,988 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 1, 1, 1] [2019-11-06 19:17:28,193 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:17:28,193 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:17:28,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:17:28,194 INFO L82 PathProgramCache]: Analyzing trace with hash 273677087, now seen corresponding path program 1 times [2019-11-06 19:17:28,194 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:17:28,194 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739116954] [2019-11-06 19:17:28,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:17:28,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:28,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:28,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:28,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:28,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:28,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:29,098 INFO L134 CoverageAnalysis]: Checked inductivity of 849 backedges. 515 proven. 2 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2019-11-06 19:17:29,099 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739116954] [2019-11-06 19:17:29,099 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356708929] [2019-11-06 19:17:29,099 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 19:17:29,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:29,284 INFO L256 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:17:29,294 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:17:29,558 INFO L134 CoverageAnalysis]: Checked inductivity of 849 backedges. 518 proven. 2 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2019-11-06 19:17:29,558 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:17:29,559 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:17:29,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101552951] [2019-11-06 19:17:29,560 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:17:29,560 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:17:29,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:17:29,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:17:29,561 INFO L87 Difference]: Start difference. First operand 4510 states and 5583 transitions. Second operand 11 states. [2019-11-06 19:17:35,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:17:35,972 INFO L93 Difference]: Finished difference Result 10080 states and 12704 transitions. [2019-11-06 19:17:35,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 19:17:35,973 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 622 [2019-11-06 19:17:35,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:17:36,000 INFO L225 Difference]: With dead ends: 10080 [2019-11-06 19:17:36,001 INFO L226 Difference]: Without dead ends: 5576 [2019-11-06 19:17:36,012 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 655 GetRequests, 637 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2019-11-06 19:17:36,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5576 states. [2019-11-06 19:17:36,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5576 to 5560. [2019-11-06 19:17:36,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5560 states. [2019-11-06 19:17:36,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5560 states to 5560 states and 6810 transitions. [2019-11-06 19:17:36,152 INFO L78 Accepts]: Start accepts. Automaton has 5560 states and 6810 transitions. Word has length 622 [2019-11-06 19:17:36,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:17:36,153 INFO L462 AbstractCegarLoop]: Abstraction has 5560 states and 6810 transitions. [2019-11-06 19:17:36,154 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 19:17:36,154 INFO L276 IsEmpty]: Start isEmpty. Operand 5560 states and 6810 transitions. [2019-11-06 19:17:36,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 630 [2019-11-06 19:17:36,177 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:17:36,184 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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 19:17:36,388 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:17:36,389 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:17:36,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:17:36,389 INFO L82 PathProgramCache]: Analyzing trace with hash 455795682, now seen corresponding path program 1 times [2019-11-06 19:17:36,390 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:17:36,390 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895003817] [2019-11-06 19:17:36,390 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:17:36,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:36,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:36,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:36,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:36,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:36,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:36,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:37,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1169 backedges. 234 proven. 20 refuted. 0 times theorem prover too weak. 915 trivial. 0 not checked. [2019-11-06 19:17:37,206 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895003817] [2019-11-06 19:17:37,207 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90338936] [2019-11-06 19:17:37,207 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 19:17:37,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:37,469 INFO L256 TraceCheckSpWp]: Trace formula consists of 933 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:17:37,479 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:17:37,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1169 backedges. 242 proven. 0 refuted. 0 times theorem prover too weak. 927 trivial. 0 not checked. [2019-11-06 19:17:37,696 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:17:37,696 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 8 [2019-11-06 19:17:37,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088552045] [2019-11-06 19:17:37,697 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:17:37,698 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:17:37,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:17:37,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:17:37,698 INFO L87 Difference]: Start difference. First operand 5560 states and 6810 transitions. Second operand 3 states.