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 --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/eca-rers2012/Problem02_label55.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-36ac518-m [2019-10-07 00:58:24,674 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-07 00:58:24,678 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-07 00:58:24,697 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-07 00:58:24,708 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-07 00:58:24,709 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-07 00:58:24,710 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-07 00:58:24,711 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-07 00:58:24,712 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-07 00:58:24,713 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-07 00:58:24,715 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-07 00:58:24,718 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-07 00:58:24,723 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-07 00:58:24,726 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-07 00:58:24,729 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-07 00:58:24,730 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-07 00:58:24,732 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-07 00:58:24,748 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-07 00:58:24,749 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-07 00:58:24,750 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-07 00:58:24,750 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 [2019-10-07 00:58:24,766 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-07 00:58:24,767 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-07 00:58:24,769 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-07 00:58:24,769 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-07 00:58:24,769 INFO L138 SettingsManager]: * Use SBE=true [2019-10-07 00:58:24,770 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-07 00:58:24,770 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-07 00:58:24,770 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-07 00:58:24,771 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-07 00:58:24,771 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-07 00:58:24,771 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-07 00:58:24,771 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-07 00:58:24,771 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-07 00:58:24,772 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-07 00:58:24,772 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-07 00:58:24,772 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-07 00:58:24,772 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-07 00:58:24,772 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-07 00:58:24,773 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-07 00:58:24,773 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-07 00:58:24,773 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-07 00:58:24,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 00:58:24,775 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-07 00:58:24,775 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-07 00:58:24,775 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-07 00:58:24,775 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-07 00:58:24,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-07 00:58:24,776 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-07 00:58:24,776 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-07 00:58:25,060 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-07 00:58:25,073 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-07 00:58:25,077 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-07 00:58:25,079 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-07 00:58:25,079 INFO L275 PluginConnector]: CDTParser initialized [2019-10-07 00:58:25,080 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label55.c [2019-10-07 00:58:25,146 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/678995ff0/bf02aad4f3c74133b86bfd141e68757e/FLAGc9d59e74c [2019-10-07 00:58:25,686 INFO L306 CDTParser]: Found 1 translation units. [2019-10-07 00:58:25,690 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label55.c [2019-10-07 00:58:25,713 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/678995ff0/bf02aad4f3c74133b86bfd141e68757e/FLAGc9d59e74c [2019-10-07 00:58:25,999 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/678995ff0/bf02aad4f3c74133b86bfd141e68757e [2019-10-07 00:58:26,012 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-07 00:58:26,014 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-07 00:58:26,015 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-07 00:58:26,015 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-07 00:58:26,018 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-07 00:58:26,019 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 12:58:26" (1/1) ... [2019-10-07 00:58:26,022 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65599f9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:58:26, skipping insertion in model container [2019-10-07 00:58:26,023 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 12:58:26" (1/1) ... [2019-10-07 00:58:26,031 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-07 00:58:26,096 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-07 00:58:26,580 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 00:58:26,586 INFO L188 MainTranslator]: Completed pre-run [2019-10-07 00:58:26,730 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 00:58:26,756 INFO L192 MainTranslator]: Completed translation [2019-10-07 00:58:26,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:58:26 WrapperNode [2019-10-07 00:58:26,757 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-07 00:58:26,758 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-07 00:58:26,758 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-07 00:58:26,758 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-07 00:58:26,777 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:58:26" (1/1) ... [2019-10-07 00:58:26,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:58:26" (1/1) ... [2019-10-07 00:58:26,807 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:58:26" (1/1) ... [2019-10-07 00:58:26,808 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:58:26" (1/1) ... [2019-10-07 00:58:26,853 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:58:26" (1/1) ... [2019-10-07 00:58:26,872 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:58:26" (1/1) ... [2019-10-07 00:58:26,883 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:58:26" (1/1) ... [2019-10-07 00:58:26,893 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-07 00:58:26,894 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-07 00:58:26,894 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-07 00:58:26,894 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-07 00:58:26,897 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:58:26" (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 [2019-10-07 00:58:26,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-07 00:58:26,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-07 00:58:26,966 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-07 00:58:26,966 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-07 00:58:26,966 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-07 00:58:26,967 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-07 00:58:26,968 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-07 00:58:26,968 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-07 00:58:26,968 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-07 00:58:26,969 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-07 00:58:26,969 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-07 00:58:28,971 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-07 00:58:28,971 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-07 00:58:28,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 12:58:28 BoogieIcfgContainer [2019-10-07 00:58:28,973 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-07 00:58:28,974 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-07 00:58:28,975 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-07 00:58:28,978 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-07 00:58:28,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 12:58:26" (1/3) ... [2019-10-07 00:58:28,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d8b1883 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 12:58:28, skipping insertion in model container [2019-10-07 00:58:28,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:58:26" (2/3) ... [2019-10-07 00:58:28,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d8b1883 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 12:58:28, skipping insertion in model container [2019-10-07 00:58:28,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 12:58:28" (3/3) ... [2019-10-07 00:58:28,982 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label55.c [2019-10-07 00:58:28,993 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-07 00:58:29,001 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-07 00:58:29,013 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-07 00:58:29,040 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-07 00:58:29,040 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-07 00:58:29,041 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-07 00:58:29,041 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-07 00:58:29,041 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-07 00:58:29,041 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-07 00:58:29,041 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-07 00:58:29,042 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-07 00:58:29,063 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-10-07 00:58:29,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-07 00:58:29,073 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 00:58:29,075 INFO L385 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 00:58:29,077 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 00:58:29,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 00:58:29,083 INFO L82 PathProgramCache]: Analyzing trace with hash -219364297, now seen corresponding path program 1 times [2019-10-07 00:58:29,092 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 00:58:29,093 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:58:29,093 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:58:29,093 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:58:29,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 00:58:29,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 00:58:29,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 00:58:29,541 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:58:29,542 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 00:58:29,543 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-07 00:58:29,549 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 00:58:29,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 00:58:29,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 00:58:29,569 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2019-10-07 00:58:30,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 00:58:30,091 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2019-10-07 00:58:30,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 00:58:30,095 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-10-07 00:58:30,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 00:58:30,116 INFO L225 Difference]: With dead ends: 273 [2019-10-07 00:58:30,117 INFO L226 Difference]: Without dead ends: 175 [2019-10-07 00:58:30,123 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 00:58:30,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-10-07 00:58:30,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-10-07 00:58:30,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-10-07 00:58:30,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 312 transitions. [2019-10-07 00:58:30,226 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 312 transitions. Word has length 86 [2019-10-07 00:58:30,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 00:58:30,228 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 312 transitions. [2019-10-07 00:58:30,228 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 00:58:30,228 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 312 transitions. [2019-10-07 00:58:30,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-07 00:58:30,244 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 00:58:30,244 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 00:58:30,245 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 00:58:30,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 00:58:30,247 INFO L82 PathProgramCache]: Analyzing trace with hash -701899076, now seen corresponding path program 1 times [2019-10-07 00:58:30,247 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 00:58:30,248 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:58:30,249 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:58:30,249 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:58:30,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 00:58:30,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 00:58:30,488 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 00:58:30,488 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:58:30,488 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 00:58:30,489 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-07 00:58:30,490 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 00:58:30,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 00:58:30,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-07 00:58:30,491 INFO L87 Difference]: Start difference. First operand 175 states and 312 transitions. Second operand 4 states. [2019-10-07 00:58:31,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 00:58:31,396 INFO L93 Difference]: Finished difference Result 681 states and 1263 transitions. [2019-10-07 00:58:31,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 00:58:31,397 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2019-10-07 00:58:31,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 00:58:31,404 INFO L225 Difference]: With dead ends: 681 [2019-10-07 00:58:31,404 INFO L226 Difference]: Without dead ends: 511 [2019-10-07 00:58:31,406 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-07 00:58:31,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2019-10-07 00:58:31,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 427. [2019-10-07 00:58:31,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2019-10-07 00:58:31,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 727 transitions. [2019-10-07 00:58:31,441 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 727 transitions. Word has length 94 [2019-10-07 00:58:31,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 00:58:31,442 INFO L462 AbstractCegarLoop]: Abstraction has 427 states and 727 transitions. [2019-10-07 00:58:31,442 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 00:58:31,442 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 727 transitions. [2019-10-07 00:58:31,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-07 00:58:31,444 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 00:58:31,445 INFO L385 BasicCegarLoop]: trace histogram [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] [2019-10-07 00:58:31,445 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 00:58:31,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 00:58:31,445 INFO L82 PathProgramCache]: Analyzing trace with hash -650188957, now seen corresponding path program 1 times [2019-10-07 00:58:31,446 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 00:58:31,446 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:58:31,446 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:58:31,446 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:58:31,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 00:58:31,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 00:58:31,567 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 00:58:31,567 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:58:31,568 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 00:58:31,568 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-07 00:58:31,570 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 00:58:31,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 00:58:31,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 00:58:31,571 INFO L87 Difference]: Start difference. First operand 427 states and 727 transitions. Second operand 3 states. [2019-10-07 00:58:32,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 00:58:32,004 INFO L93 Difference]: Finished difference Result 1269 states and 2235 transitions. [2019-10-07 00:58:32,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 00:58:32,005 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 110 [2019-10-07 00:58:32,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 00:58:32,012 INFO L225 Difference]: With dead ends: 1269 [2019-10-07 00:58:32,013 INFO L226 Difference]: Without dead ends: 847 [2019-10-07 00:58:32,017 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 00:58:32,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2019-10-07 00:58:32,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 847. [2019-10-07 00:58:32,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 847 states. [2019-10-07 00:58:32,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 1392 transitions. [2019-10-07 00:58:32,079 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 1392 transitions. Word has length 110 [2019-10-07 00:58:32,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 00:58:32,080 INFO L462 AbstractCegarLoop]: Abstraction has 847 states and 1392 transitions. [2019-10-07 00:58:32,080 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 00:58:32,080 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 1392 transitions. [2019-10-07 00:58:32,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-07 00:58:32,084 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 00:58:32,085 INFO L385 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 00:58:32,085 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 00:58:32,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 00:58:32,085 INFO L82 PathProgramCache]: Analyzing trace with hash 482298052, now seen corresponding path program 1 times [2019-10-07 00:58:32,086 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 00:58:32,086 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:58:32,086 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:58:32,086 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:58:32,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 00:58:32,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 00:58:32,232 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 40 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-07 00:58:32,233 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:58:32,233 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 00:58:32,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 00:58:32,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 00:58:32,345 INFO L256 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-07 00:58:32,355 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 00:58:32,472 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-07 00:58:32,473 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 00:58:32,588 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 40 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-07 00:58:32,589 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 00:58:32,589 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-07 00:58:32,590 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 00:58:32,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 00:58:32,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-07 00:58:32,591 INFO L87 Difference]: Start difference. First operand 847 states and 1392 transitions. Second operand 5 states. [2019-10-07 00:58:32,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 00:58:32,977 INFO L93 Difference]: Finished difference Result 1689 states and 2830 transitions. [2019-10-07 00:58:32,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-07 00:58:32,977 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 132 [2019-10-07 00:58:32,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 00:58:32,983 INFO L225 Difference]: With dead ends: 1689 [2019-10-07 00:58:32,983 INFO L226 Difference]: Without dead ends: 847 [2019-10-07 00:58:32,987 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 258 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-10-07 00:58:32,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2019-10-07 00:58:33,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 847. [2019-10-07 00:58:33,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 847 states. [2019-10-07 00:58:33,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 1251 transitions. [2019-10-07 00:58:33,046 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 1251 transitions. Word has length 132 [2019-10-07 00:58:33,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 00:58:33,047 INFO L462 AbstractCegarLoop]: Abstraction has 847 states and 1251 transitions. [2019-10-07 00:58:33,047 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 00:58:33,047 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 1251 transitions. [2019-10-07 00:58:33,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-10-07 00:58:33,052 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 00:58:33,053 INFO L385 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 00:58:33,259 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 00:58:33,259 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 00:58:33,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 00:58:33,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1609783538, now seen corresponding path program 1 times [2019-10-07 00:58:33,261 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 00:58:33,261 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:58:33,262 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:58:33,262 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:58:33,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 00:58:33,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 00:58:33,436 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 44 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 00:58:33,437 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:58:33,437 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 00:58:33,437 INFO L95 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 [2019-10-07 00:58:33,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 00:58:33,559 INFO L256 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-07 00:58:33,574 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 00:58:33,639 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 00:58:33,640 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 00:58:33,745 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 00:58:33,746 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019-10-07 00:58:33,787 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-07 00:58:33,788 INFO L169 IcfgInterpreter]: Building call graph [2019-10-07 00:58:33,794 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-07 00:58:33,802 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-07 00:58:33,804 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-07 00:58:34,131 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 87 for LOIs [2019-10-07 00:58:34,764 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 00:58:34,765 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true; at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.generateProof(TraceAbstractionRefinementEngine.java:177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:133) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true; at de.uni_freiburg.informatik.ultimate.lib.sifa.PriorityWorklist.add(PriorityWorklist.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.lambda$2(DagInterpreter.java:135) at java.lang.Iterable.forEach(Iterable.java:75) at java.util.Collections$UnmodifiableCollection.forEach(Collections.java:1080) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:135) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:104) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.computeTopSummary(TopInputCallSummarizer.java:78) at java.util.HashMap.computeIfAbsent(HashMap.java:1127) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.summarize(TopInputCallSummarizer.java:67) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:230) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:214) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:197) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:166) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:130) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:104) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarizeInternal(FixpointLoopSummarizer.java:118) at java.util.HashMap.computeIfAbsent(HashMap.java:1127) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:178) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:169) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:130) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:129) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:99) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:99) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:287) ... 21 more [2019-10-07 00:58:34,776 INFO L168 Benchmark]: Toolchain (without parser) took 8761.53 ms. Allocated memory was 138.4 MB in the beginning and 334.0 MB in the end (delta: 195.6 MB). Free memory was 101.6 MB in the beginning and 275.0 MB in the end (delta: -173.3 MB). Peak memory consumption was 22.2 MB. Max. memory is 7.1 GB. [2019-10-07 00:58:34,777 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 138.4 MB. Free memory is still 121.3 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-10-07 00:58:34,778 INFO L168 Benchmark]: CACSL2BoogieTranslator took 742.69 ms. Allocated memory was 138.4 MB in the beginning and 205.5 MB in the end (delta: 67.1 MB). Free memory was 101.2 MB in the beginning and 172.1 MB in the end (delta: -70.9 MB). Peak memory consumption was 34.0 MB. Max. memory is 7.1 GB. [2019-10-07 00:58:34,782 INFO L168 Benchmark]: Boogie Preprocessor took 135.78 ms. Allocated memory is still 205.5 MB. Free memory was 172.1 MB in the beginning and 166.9 MB in the end (delta: 5.2 MB). Peak memory consumption was 5.2 MB. Max. memory is 7.1 GB. [2019-10-07 00:58:34,784 INFO L168 Benchmark]: RCFGBuilder took 2079.41 ms. Allocated memory was 205.5 MB in the beginning and 252.2 MB in the end (delta: 46.7 MB). Free memory was 166.9 MB in the beginning and 206.7 MB in the end (delta: -39.8 MB). Peak memory consumption was 118.0 MB. Max. memory is 7.1 GB. [2019-10-07 00:58:34,785 INFO L168 Benchmark]: TraceAbstraction took 5798.91 ms. Allocated memory was 252.2 MB in the beginning and 334.0 MB in the end (delta: 81.8 MB). Free memory was 206.7 MB in the beginning and 275.0 MB in the end (delta: -68.3 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2019-10-07 00:58:34,796 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 138.4 MB. Free memory is still 121.3 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 742.69 ms. Allocated memory was 138.4 MB in the beginning and 205.5 MB in the end (delta: 67.1 MB). Free memory was 101.2 MB in the beginning and 172.1 MB in the end (delta: -70.9 MB). Peak memory consumption was 34.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 135.78 ms. Allocated memory is still 205.5 MB. Free memory was 172.1 MB in the beginning and 166.9 MB in the end (delta: 5.2 MB). Peak memory consumption was 5.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 2079.41 ms. Allocated memory was 205.5 MB in the beginning and 252.2 MB in the end (delta: 46.7 MB). Free memory was 166.9 MB in the beginning and 206.7 MB in the end (delta: -39.8 MB). Peak memory consumption was 118.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5798.91 ms. Allocated memory was 252.2 MB in the beginning and 334.0 MB in the end (delta: 81.8 MB). Free memory was 206.7 MB in the beginning and 275.0 MB in the end (delta: -68.3 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true; de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true;: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:295) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...