/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 --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label04.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:56:30,657 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:56:30,660 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:56:30,674 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:56:30,684 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:56:30,685 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:56:30,686 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:56:30,687 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:56:30,688 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:56:30,689 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:56:30,691 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:56:30,692 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:56:30,694 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:56:30,696 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:56:30,697 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:56:30,697 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:56:30,702 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:56:30,714 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:56:30,716 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:56:30,718 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:56:30,719 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 22:56:30,740 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:56:30,740 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:56:30,742 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:56:30,743 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:56:30,743 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:56:30,743 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:56:30,743 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:56:30,744 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:56:30,744 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:56:30,744 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:56:30,745 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:56:30,745 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:56:30,745 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:56:30,746 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:56:30,746 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:56:30,746 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:56:30,746 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:56:30,747 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:56:30,747 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:56:30,747 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:56:30,747 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:56:30,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:56:30,748 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:56:30,748 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:56:30,748 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:56:30,748 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:56:30,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:56:30,749 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:56:30,749 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-11-06 22:56:31,019 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:56:31,032 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:56:31,037 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:56:31,039 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:56:31,039 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:56:31,040 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label04.c [2019-11-06 22:56:31,117 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19a7c3cf3/4f776d74b14f4585a341bf47bc27961c/FLAG7fa84cf40 [2019-11-06 22:56:31,811 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:56:31,812 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label04.c [2019-11-06 22:56:31,836 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19a7c3cf3/4f776d74b14f4585a341bf47bc27961c/FLAG7fa84cf40 [2019-11-06 22:56:31,999 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19a7c3cf3/4f776d74b14f4585a341bf47bc27961c [2019-11-06 22:56:32,013 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:56:32,015 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:56:32,018 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:56:32,018 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:56:32,021 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:56:32,022 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:56:32" (1/1) ... [2019-11-06 22:56:32,025 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3af577bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:32, skipping insertion in model container [2019-11-06 22:56:32,026 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:56:32" (1/1) ... [2019-11-06 22:56:32,035 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:56:32,144 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:56:33,229 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:56:33,245 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:56:33,687 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:56:33,708 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:56:33,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:33 WrapperNode [2019-11-06 22:56:33,709 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:56:33,710 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:56:33,710 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:56:33,710 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:56:33,725 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:33" (1/1) ... [2019-11-06 22:56:33,726 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:33" (1/1) ... [2019-11-06 22:56:33,785 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:33" (1/1) ... [2019-11-06 22:56:33,787 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:33" (1/1) ... [2019-11-06 22:56:33,858 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:33" (1/1) ... [2019-11-06 22:56:33,893 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:33" (1/1) ... [2019-11-06 22:56:33,914 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:33" (1/1) ... [2019-11-06 22:56:33,939 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:56:33,940 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:56:33,940 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:56:33,940 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:56:33,941 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:33" (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 22:56:34,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:56:34,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:56:34,008 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:56:34,009 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:56:34,009 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:56:34,009 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:56:34,009 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:56:34,009 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:56:34,009 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:56:34,010 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:56:34,010 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:56:34,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:56:34,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:56:37,940 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:56:37,941 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:56:37,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:56:37 BoogieIcfgContainer [2019-11-06 22:56:37,946 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:56:37,947 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:56:37,947 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:56:37,950 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:56:37,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:56:32" (1/3) ... [2019-11-06 22:56:37,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@597b60da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:56:37, skipping insertion in model container [2019-11-06 22:56:37,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:33" (2/3) ... [2019-11-06 22:56:37,953 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@597b60da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:56:37, skipping insertion in model container [2019-11-06 22:56:37,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:56:37" (3/3) ... [2019-11-06 22:56:37,957 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem17_label04.c [2019-11-06 22:56:37,967 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:56:37,977 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:56:37,987 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:56:38,017 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:56:38,018 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:56:38,018 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:56:38,018 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:56:38,018 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:56:38,018 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:56:38,018 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:56:38,018 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:56:38,048 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states. [2019-11-06 22:56:38,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-06 22:56:38,055 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:56:38,056 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] [2019-11-06 22:56:38,058 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:56:38,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:56:38,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1223613225, now seen corresponding path program 1 times [2019-11-06 22:56:38,073 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:56:38,073 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165797153] [2019-11-06 22:56:38,073 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:56:38,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:38,335 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 22:56:38,335 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165797153] [2019-11-06 22:56:38,336 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:56:38,336 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:56:38,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457063632] [2019-11-06 22:56:38,344 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:56:38,345 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:56:38,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:56:38,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:56:38,363 INFO L87 Difference]: Start difference. First operand 603 states. Second operand 4 states. [2019-11-06 22:56:44,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:56:44,781 INFO L93 Difference]: Finished difference Result 2133 states and 3962 transitions. [2019-11-06 22:56:44,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:56:44,786 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2019-11-06 22:56:44,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:56:44,829 INFO L225 Difference]: With dead ends: 2133 [2019-11-06 22:56:44,829 INFO L226 Difference]: Without dead ends: 1451 [2019-11-06 22:56:44,845 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:56:44,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2019-11-06 22:56:44,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 1437. [2019-11-06 22:56:44,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1437 states. [2019-11-06 22:56:45,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1437 states to 1437 states and 2166 transitions. [2019-11-06 22:56:45,008 INFO L78 Accepts]: Start accepts. Automaton has 1437 states and 2166 transitions. Word has length 26 [2019-11-06 22:56:45,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:56:45,009 INFO L462 AbstractCegarLoop]: Abstraction has 1437 states and 2166 transitions. [2019-11-06 22:56:45,010 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:56:45,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1437 states and 2166 transitions. [2019-11-06 22:56:45,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-11-06 22:56:45,017 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:56:45,018 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 22:56:45,018 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:56:45,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:56:45,019 INFO L82 PathProgramCache]: Analyzing trace with hash -255135052, now seen corresponding path program 1 times [2019-11-06 22:56:45,020 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:56:45,020 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331044763] [2019-11-06 22:56:45,020 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:56:45,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:45,256 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:56:45,257 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331044763] [2019-11-06 22:56:45,257 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:56:45,257 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:56:45,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686065199] [2019-11-06 22:56:45,265 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:56:45,265 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:56:45,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:56:45,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:56:45,266 INFO L87 Difference]: Start difference. First operand 1437 states and 2166 transitions. Second operand 5 states. [2019-11-06 22:56:50,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:56:50,394 INFO L93 Difference]: Finished difference Result 4255 states and 6536 transitions. [2019-11-06 22:56:50,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:56:50,395 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 97 [2019-11-06 22:56:50,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:56:50,418 INFO L225 Difference]: With dead ends: 4255 [2019-11-06 22:56:50,418 INFO L226 Difference]: Without dead ends: 2824 [2019-11-06 22:56:50,424 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:56:50,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2824 states. [2019-11-06 22:56:50,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2824 to 2794. [2019-11-06 22:56:50,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2794 states. [2019-11-06 22:56:50,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2794 states to 2794 states and 3921 transitions. [2019-11-06 22:56:50,540 INFO L78 Accepts]: Start accepts. Automaton has 2794 states and 3921 transitions. Word has length 97 [2019-11-06 22:56:50,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:56:50,541 INFO L462 AbstractCegarLoop]: Abstraction has 2794 states and 3921 transitions. [2019-11-06 22:56:50,541 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:56:50,541 INFO L276 IsEmpty]: Start isEmpty. Operand 2794 states and 3921 transitions. [2019-11-06 22:56:50,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-11-06 22:56:50,551 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:56:50,551 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 22:56:50,551 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:56:50,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:56:50,552 INFO L82 PathProgramCache]: Analyzing trace with hash -414121280, now seen corresponding path program 1 times [2019-11-06 22:56:50,553 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:56:50,553 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341516625] [2019-11-06 22:56:50,554 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:56:50,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:50,779 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:56:50,779 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341516625] [2019-11-06 22:56:50,779 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283331164] [2019-11-06 22:56:50,780 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 22:56:50,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:50,864 INFO L256 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 22:56:50,873 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:56:50,938 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:56:50,939 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:56:50,941 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:56:50,945 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:56:50,946 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:56:50,947 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:56:50,949 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:56:50,950 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms