/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/Problem15_label17.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:15:34,733 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:15:34,735 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:15:34,748 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:15:34,758 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:15:34,759 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:15:34,760 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:15:34,761 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:15:34,762 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:15:34,763 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:15:34,765 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:15:34,766 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:15:34,768 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:15:34,769 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:15:34,770 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:15:34,771 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:15:34,773 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:15:34,781 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:15:34,782 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:15:34,783 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:15:34,783 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 19:15:34,798 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:15:34,798 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:15:34,799 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:15:34,799 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:15:34,800 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:15:34,800 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:15:34,800 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:15:34,800 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:15:34,800 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:15:34,801 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:15:34,801 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:15:34,801 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:15:34,801 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:15:34,801 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:15:34,802 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:15:34,802 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:15:34,802 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:15:34,802 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:15:34,802 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:15:34,803 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:15:34,803 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:15:34,803 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:15:34,803 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:15:34,804 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:15:34,804 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:15:34,804 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:15:34,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:15:34,804 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:15:34,805 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:15:35,068 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:15:35,086 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:15:35,090 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:15:35,092 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:15:35,092 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:15:35,093 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label17.c [2019-11-06 19:15:35,164 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb7cf23db/449e2713fbfa4fd89476ec67eeacd02c/FLAG58a2cbc42 [2019-11-06 19:15:35,895 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:15:35,896 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label17.c [2019-11-06 19:15:35,924 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb7cf23db/449e2713fbfa4fd89476ec67eeacd02c/FLAG58a2cbc42 [2019-11-06 19:15:36,066 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb7cf23db/449e2713fbfa4fd89476ec67eeacd02c [2019-11-06 19:15:36,080 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:15:36,081 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:15:36,085 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:15:36,085 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:15:36,089 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:15:36,090 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:15:36" (1/1) ... [2019-11-06 19:15:36,093 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d964f2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:36, skipping insertion in model container [2019-11-06 19:15:36,093 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:15:36" (1/1) ... [2019-11-06 19:15:36,102 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:15:36,197 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:15:37,109 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:15:37,119 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:15:37,436 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:15:37,464 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:15:37,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:37 WrapperNode [2019-11-06 19:15:37,465 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:15:37,466 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:15:37,467 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:15:37,467 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:15:37,484 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:37" (1/1) ... [2019-11-06 19:15:37,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:37" (1/1) ... [2019-11-06 19:15:37,549 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:37" (1/1) ... [2019-11-06 19:15:37,550 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:37" (1/1) ... [2019-11-06 19:15:37,635 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:37" (1/1) ... [2019-11-06 19:15:37,668 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:37" (1/1) ... [2019-11-06 19:15:37,697 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:37" (1/1) ... [2019-11-06 19:15:37,726 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:15:37,727 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:15:37,727 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:15:37,727 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:15:37,728 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:37" (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 19:15:37,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:15:37,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:15:37,804 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:15:37,804 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:15:37,804 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:15:37,804 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:15:37,805 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:15:37,805 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:15:37,805 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:15:37,805 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:15:37,836 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:15:37,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:15:37,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:15:40,952 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:15:40,953 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:15:40,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:15:40 BoogieIcfgContainer [2019-11-06 19:15:40,957 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:15:40,959 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:15:40,959 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:15:40,963 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:15:40,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:15:36" (1/3) ... [2019-11-06 19:15:40,965 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ddb3627 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:15:40, skipping insertion in model container [2019-11-06 19:15:40,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:37" (2/3) ... [2019-11-06 19:15:40,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ddb3627 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:15:40, skipping insertion in model container [2019-11-06 19:15:40,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:15:40" (3/3) ... [2019-11-06 19:15:40,981 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label17.c [2019-11-06 19:15:40,994 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:15:41,008 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:15:41,027 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:15:41,082 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:15:41,084 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:15:41,084 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:15:41,084 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:15:41,084 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:15:41,085 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:15:41,085 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:15:41,085 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:15:41,137 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-11-06 19:15:41,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-06 19:15:41,155 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:41,157 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:15:41,159 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:41,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:41,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1566506531, now seen corresponding path program 1 times [2019-11-06 19:15:41,183 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:41,184 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966656463] [2019-11-06 19:15:41,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:41,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:41,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:41,783 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 19:15:41,783 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966656463] [2019-11-06 19:15:41,784 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:15:41,785 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:15:41,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589449299] [2019-11-06 19:15:41,791 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:15:41,792 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:41,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:15:41,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:15:41,809 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 5 states. [2019-11-06 19:15:49,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:49,043 INFO L93 Difference]: Finished difference Result 1528 states and 2801 transitions. [2019-11-06 19:15:49,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:15:49,052 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2019-11-06 19:15:49,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:49,083 INFO L225 Difference]: With dead ends: 1528 [2019-11-06 19:15:49,083 INFO L226 Difference]: Without dead ends: 1022 [2019-11-06 19:15:49,092 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 19:15:49,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1022 states. [2019-11-06 19:15:49,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1022 to 1016. [2019-11-06 19:15:49,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1016 states. [2019-11-06 19:15:49,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 1523 transitions. [2019-11-06 19:15:49,223 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 1523 transitions. Word has length 69 [2019-11-06 19:15:49,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:49,224 INFO L462 AbstractCegarLoop]: Abstraction has 1016 states and 1523 transitions. [2019-11-06 19:15:49,224 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:15:49,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 1523 transitions. [2019-11-06 19:15:49,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-11-06 19:15:49,232 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:49,232 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, 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] [2019-11-06 19:15:49,232 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:49,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:49,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1392036326, now seen corresponding path program 1 times [2019-11-06 19:15:49,233 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:49,233 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366538463] [2019-11-06 19:15:49,234 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:49,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:49,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:49,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:49,497 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 61 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:15:49,500 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366538463] [2019-11-06 19:15:49,500 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655155808] [2019-11-06 19:15:49,500 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 19:15:49,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:49,599 INFO L256 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:15:49,616 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:15:49,710 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:15:49,711 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:15:49,712 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:15:49,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548427498] [2019-11-06 19:15:49,716 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:15:49,717 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:49,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:15:49,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:15:49,717 INFO L87 Difference]: Start difference. First operand 1016 states and 1523 transitions. Second operand 3 states. [2019-11-06 19:15:51,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:51,861 INFO L93 Difference]: Finished difference Result 2961 states and 4483 transitions. [2019-11-06 19:15:51,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:15:51,862 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2019-11-06 19:15:51,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:51,874 INFO L225 Difference]: With dead ends: 2961 [2019-11-06 19:15:51,874 INFO L226 Difference]: Without dead ends: 1951 [2019-11-06 19:15:51,878 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:15:51,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1951 states. [2019-11-06 19:15:51,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1951 to 1949. [2019-11-06 19:15:51,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1949 states. [2019-11-06 19:15:51,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1949 states to 1949 states and 2576 transitions. [2019-11-06 19:15:51,975 INFO L78 Accepts]: Start accepts. Automaton has 1949 states and 2576 transitions. Word has length 138 [2019-11-06 19:15:51,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:51,976 INFO L462 AbstractCegarLoop]: Abstraction has 1949 states and 2576 transitions. [2019-11-06 19:15:51,976 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:15:51,977 INFO L276 IsEmpty]: Start isEmpty. Operand 1949 states and 2576 transitions. [2019-11-06 19:15:51,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2019-11-06 19:15:51,990 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:51,991 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, 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, 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 19:15:52,191 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:52,192 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:52,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:52,193 INFO L82 PathProgramCache]: Analyzing trace with hash -124404866, now seen corresponding path program 1 times [2019-11-06 19:15:52,193 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:52,194 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829147914] [2019-11-06 19:15:52,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:52,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:52,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:52,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:52,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:52,678 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 125 proven. 2 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-11-06 19:15:52,679 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829147914] [2019-11-06 19:15:52,679 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894038861] [2019-11-06 19:15:52,679 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 19:15:52,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:52,793 INFO L256 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 19:15:52,799 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:15:52,925 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 125 proven. 2 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-11-06 19:15:52,925 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:15:52,934 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2019-11-06 19:15:52,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206746041] [2019-11-06 19:15:52,935 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:15:52,935 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:52,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:15:52,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:15:52,940 INFO L87 Difference]: Start difference. First operand 1949 states and 2576 transitions. Second operand 8 states. [2019-11-06 19:15:58,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:58,383 INFO L93 Difference]: Finished difference Result 5832 states and 7801 transitions. [2019-11-06 19:15:58,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 19:15:58,385 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 247 [2019-11-06 19:15:58,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:58,403 INFO L225 Difference]: With dead ends: 5832 [2019-11-06 19:15:58,403 INFO L226 Difference]: Without dead ends: 3889 [2019-11-06 19:15:58,408 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:15:58,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3889 states. [2019-11-06 19:15:58,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3889 to 3540. [2019-11-06 19:15:58,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3540 states. [2019-11-06 19:15:58,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3540 states to 3540 states and 4406 transitions. [2019-11-06 19:15:58,504 INFO L78 Accepts]: Start accepts. Automaton has 3540 states and 4406 transitions. Word has length 247 [2019-11-06 19:15:58,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:58,505 INFO L462 AbstractCegarLoop]: Abstraction has 3540 states and 4406 transitions. [2019-11-06 19:15:58,505 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:15:58,505 INFO L276 IsEmpty]: Start isEmpty. Operand 3540 states and 4406 transitions. [2019-11-06 19:15:58,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2019-11-06 19:15:58,512 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:58,512 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:15:58,715 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:58,716 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:58,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:58,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1830477260, now seen corresponding path program 1 times [2019-11-06 19:15:58,718 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:58,718 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093381007] [2019-11-06 19:15:58,719 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:58,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:58,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:58,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:58,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:59,063 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 125 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-06 19:15:59,064 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093381007] [2019-11-06 19:15:59,064 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256686307] [2019-11-06 19:15:59,064 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 19:15:59,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:59,241 INFO L256 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:15:59,255 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:15:59,346 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-06 19:15:59,346 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:15:59,346 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:15:59,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007691210] [2019-11-06 19:15:59,348 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:15:59,348 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:59,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:15:59,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:15:59,349 INFO L87 Difference]: Start difference. First operand 3540 states and 4406 transitions. Second operand 3 states. [2019-11-06 19:16:01,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:16:01,606 INFO L93 Difference]: Finished difference Result 8943 states and 11478 transitions. [2019-11-06 19:16:01,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:16:01,617 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 349 [2019-11-06 19:16:01,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:16:01,646 INFO L225 Difference]: With dead ends: 8943 [2019-11-06 19:16:01,647 INFO L226 Difference]: Without dead ends: 5409 [2019-11-06 19:16:01,655 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 354 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:16:01,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5409 states. [2019-11-06 19:16:01,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5409 to 5102. [2019-11-06 19:16:01,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5102 states. [2019-11-06 19:16:01,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5102 states to 5102 states and 6524 transitions. [2019-11-06 19:16:01,792 INFO L78 Accepts]: Start accepts. Automaton has 5102 states and 6524 transitions. Word has length 349 [2019-11-06 19:16:01,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:16:01,795 INFO L462 AbstractCegarLoop]: Abstraction has 5102 states and 6524 transitions. [2019-11-06 19:16:01,795 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:16:01,795 INFO L276 IsEmpty]: Start isEmpty. Operand 5102 states and 6524 transitions. [2019-11-06 19:16:01,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2019-11-06 19:16:01,807 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:16:01,807 INFO L410 BasicCegarLoop]: trace histogram [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, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:16:02,019 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:16:02,020 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:16:02,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:16:02,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1309734060, now seen corresponding path program 1 times [2019-11-06 19:16:02,022 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:16:02,022 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214333038] [2019-11-06 19:16:02,023 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:16:02,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:02,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:02,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:02,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:02,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:02,649 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 347 proven. 2 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-11-06 19:16:02,650 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214333038] [2019-11-06 19:16:02,650 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099862029] [2019-11-06 19:16:02,650 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 19:16:02,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:02,799 INFO L256 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:16:02,804 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:16:02,997 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 349 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-06 19:16:02,998 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:16:02,998 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:16:02,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286177703] [2019-11-06 19:16:03,000 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:16:03,000 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:16:03,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:16:03,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:16:03,001 INFO L87 Difference]: Start difference. First operand 5102 states and 6524 transitions. Second operand 11 states. [2019-11-06 19:16:12,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:16:12,755 INFO L93 Difference]: Finished difference Result 14622 states and 20498 transitions. [2019-11-06 19:16:12,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-06 19:16:12,757 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 431 [2019-11-06 19:16:12,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:16:12,810 INFO L225 Difference]: With dead ends: 14622 [2019-11-06 19:16:12,811 INFO L226 Difference]: Without dead ends: 9526 [2019-11-06 19:16:12,829 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 453 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=236, Invalid=634, Unknown=0, NotChecked=0, Total=870 [2019-11-06 19:16:12,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9526 states. [2019-11-06 19:16:13,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9526 to 9132. [2019-11-06 19:16:13,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9132 states. [2019-11-06 19:16:13,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9132 states to 9132 states and 11569 transitions. [2019-11-06 19:16:13,150 INFO L78 Accepts]: Start accepts. Automaton has 9132 states and 11569 transitions. Word has length 431 [2019-11-06 19:16:13,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:16:13,154 INFO L462 AbstractCegarLoop]: Abstraction has 9132 states and 11569 transitions. [2019-11-06 19:16:13,154 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 19:16:13,154 INFO L276 IsEmpty]: Start isEmpty. Operand 9132 states and 11569 transitions. [2019-11-06 19:16:13,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2019-11-06 19:16:13,177 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:16:13,177 INFO L410 BasicCegarLoop]: trace histogram [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, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:16:13,390 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:16:13,390 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:16:13,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:16:13,391 INFO L82 PathProgramCache]: Analyzing trace with hash -835180680, now seen corresponding path program 1 times [2019-11-06 19:16:13,392 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:16:13,392 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618891814] [2019-11-06 19:16:13,393 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:16:13,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:13,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:13,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:13,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:13,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat