/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/Problem15_label42.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:53:12,606 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:53:12,609 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:53:12,620 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:53:12,635 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:53:12,637 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:53:12,637 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:53:12,641 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:53:12,641 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:53:12,642 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:53:12,646 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:53:12,651 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:53:12,654 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:53:12,654 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:53:12,655 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:53:12,656 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:53:12,659 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:53:12,673 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:53:12,677 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:53:12,678 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:53:12,678 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 22:53:12,700 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:53:12,701 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:53:12,702 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:53:12,702 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:53:12,703 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:53:12,703 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:53:12,703 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:53:12,704 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:53:12,704 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:53:12,704 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:53:12,705 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:53:12,705 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:53:12,705 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:53:12,706 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:53:12,706 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:53:12,706 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:53:12,706 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:53:12,707 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:53:12,707 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:53:12,707 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:53:12,707 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:53:12,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:53:12,708 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:53:12,708 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:53:12,708 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:53:12,708 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:53:12,708 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:53:12,708 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:53:12,709 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 22:53:12,986 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:53:13,005 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:53:13,009 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:53:13,010 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:53:13,010 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:53:13,011 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label42.c [2019-11-06 22:53:13,078 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b07e709f/a774f4ecaf234d12b7a6456f8227b982/FLAG33e70fadf [2019-11-06 22:53:13,722 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:53:13,723 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label42.c [2019-11-06 22:53:13,742 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b07e709f/a774f4ecaf234d12b7a6456f8227b982/FLAG33e70fadf [2019-11-06 22:53:13,953 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b07e709f/a774f4ecaf234d12b7a6456f8227b982 [2019-11-06 22:53:13,975 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:53:13,978 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:53:13,986 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:53:13,986 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:53:13,993 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:53:13,996 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:53:13" (1/1) ... [2019-11-06 22:53:14,001 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22e2061d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:13, skipping insertion in model container [2019-11-06 22:53:14,005 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:53:13" (1/1) ... [2019-11-06 22:53:14,025 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:53:14,177 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:53:15,107 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:53:15,121 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:53:15,430 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:53:15,450 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:53:15,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:15 WrapperNode [2019-11-06 22:53:15,451 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:53:15,452 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:53:15,452 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:53:15,452 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:53:15,467 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:15" (1/1) ... [2019-11-06 22:53:15,468 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:15" (1/1) ... [2019-11-06 22:53:15,520 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:15" (1/1) ... [2019-11-06 22:53:15,520 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:15" (1/1) ... [2019-11-06 22:53:15,602 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:15" (1/1) ... [2019-11-06 22:53:15,618 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:15" (1/1) ... [2019-11-06 22:53:15,638 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:15" (1/1) ... [2019-11-06 22:53:15,660 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:53:15,661 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:53:15,661 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:53:15,661 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:53:15,662 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:15" (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 22:53:15,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:53:15,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:53:15,729 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:53:15,729 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:53:15,729 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:53:15,730 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:53:15,730 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:53:15,730 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:53:15,730 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:53:15,731 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:53:15,731 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:53:15,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:53:15,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:53:20,179 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:53:20,180 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:53:20,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:53:20 BoogieIcfgContainer [2019-11-06 22:53:20,181 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:53:20,182 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:53:20,183 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:53:20,186 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:53:20,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:53:13" (1/3) ... [2019-11-06 22:53:20,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dc80d8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:53:20, skipping insertion in model container [2019-11-06 22:53:20,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:15" (2/3) ... [2019-11-06 22:53:20,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dc80d8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:53:20, skipping insertion in model container [2019-11-06 22:53:20,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:53:20" (3/3) ... [2019-11-06 22:53:20,191 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label42.c [2019-11-06 22:53:20,203 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:53:20,212 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:53:20,226 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:53:20,258 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:53:20,258 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:53:20,258 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:53:20,259 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:53:20,259 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:53:20,259 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:53:20,259 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:53:20,259 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:53:20,289 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-11-06 22:53:20,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-06 22:53:20,299 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:53:20,300 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] [2019-11-06 22:53:20,302 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:53:20,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:53:20,309 INFO L82 PathProgramCache]: Analyzing trace with hash 2044127672, now seen corresponding path program 1 times [2019-11-06 22:53:20,320 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:53:20,320 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154357308] [2019-11-06 22:53:20,321 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:53:20,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:53:20,681 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 22:53:20,682 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154357308] [2019-11-06 22:53:20,683 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:53:20,683 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:53:20,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180812689] [2019-11-06 22:53:20,691 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:53:20,693 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:53:20,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:53:20,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:53:20,713 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 4 states. [2019-11-06 22:53:25,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:53:25,788 INFO L93 Difference]: Finished difference Result 1554 states and 2845 transitions. [2019-11-06 22:53:25,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:53:25,790 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2019-11-06 22:53:25,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:53:25,819 INFO L225 Difference]: With dead ends: 1554 [2019-11-06 22:53:25,820 INFO L226 Difference]: Without dead ends: 1036 [2019-11-06 22:53:25,829 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 22:53:25,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2019-11-06 22:53:25,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 1013. [2019-11-06 22:53:25,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1013 states. [2019-11-06 22:53:25,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 1638 transitions. [2019-11-06 22:53:25,976 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 1638 transitions. Word has length 52 [2019-11-06 22:53:25,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:53:25,977 INFO L462 AbstractCegarLoop]: Abstraction has 1013 states and 1638 transitions. [2019-11-06 22:53:25,978 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:53:25,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 1638 transitions. [2019-11-06 22:53:25,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-11-06 22:53:25,985 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:53:25,985 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:53:25,985 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:53:25,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:53:25,986 INFO L82 PathProgramCache]: Analyzing trace with hash 147073843, now seen corresponding path program 1 times [2019-11-06 22:53:25,986 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:53:25,986 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648550918] [2019-11-06 22:53:25,986 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:53:26,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:53:26,200 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:53:26,200 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648550918] [2019-11-06 22:53:26,200 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:53:26,201 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:53:26,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666147286] [2019-11-06 22:53:26,209 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:53:26,209 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:53:26,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:53:26,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:53:26,210 INFO L87 Difference]: Start difference. First operand 1013 states and 1638 transitions. Second operand 5 states. [2019-11-06 22:53:29,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:53:29,759 INFO L93 Difference]: Finished difference Result 3003 states and 4930 transitions. [2019-11-06 22:53:29,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:53:29,760 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 124 [2019-11-06 22:53:29,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:53:29,774 INFO L225 Difference]: With dead ends: 3003 [2019-11-06 22:53:29,775 INFO L226 Difference]: Without dead ends: 1996 [2019-11-06 22:53:29,779 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 22:53:29,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1996 states. [2019-11-06 22:53:29,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1996 to 1958. [2019-11-06 22:53:29,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1958 states. [2019-11-06 22:53:29,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1958 states to 1958 states and 2746 transitions. [2019-11-06 22:53:29,855 INFO L78 Accepts]: Start accepts. Automaton has 1958 states and 2746 transitions. Word has length 124 [2019-11-06 22:53:29,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:53:29,856 INFO L462 AbstractCegarLoop]: Abstraction has 1958 states and 2746 transitions. [2019-11-06 22:53:29,856 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:53:29,857 INFO L276 IsEmpty]: Start isEmpty. Operand 1958 states and 2746 transitions. [2019-11-06 22:53:29,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-11-06 22:53:29,860 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:53:29,860 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:53:29,860 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:53:29,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:53:29,861 INFO L82 PathProgramCache]: Analyzing trace with hash -855279069, now seen corresponding path program 1 times [2019-11-06 22:53:29,861 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:53:29,862 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240354708] [2019-11-06 22:53:29,862 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:53:29,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:53:30,010 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:53:30,011 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240354708] [2019-11-06 22:53:30,012 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:53:30,013 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:53:30,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852109515] [2019-11-06 22:53:30,016 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:53:30,016 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:53:30,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:53:30,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:53:30,018 INFO L87 Difference]: Start difference. First operand 1958 states and 2746 transitions. Second operand 4 states. [2019-11-06 22:53:34,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:53:34,180 INFO L93 Difference]: Finished difference Result 7620 states and 10955 transitions. [2019-11-06 22:53:34,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:53:34,181 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 132 [2019-11-06 22:53:34,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:53:34,219 INFO L225 Difference]: With dead ends: 7620 [2019-11-06 22:53:34,220 INFO L226 Difference]: Without dead ends: 5668 [2019-11-06 22:53:34,227 INFO L630 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 [2019-11-06 22:53:34,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5668 states. [2019-11-06 22:53:34,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5668 to 5666. [2019-11-06 22:53:34,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5666 states. [2019-11-06 22:53:34,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5666 states to 5666 states and 7447 transitions. [2019-11-06 22:53:34,407 INFO L78 Accepts]: Start accepts. Automaton has 5666 states and 7447 transitions. Word has length 132 [2019-11-06 22:53:34,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:53:34,408 INFO L462 AbstractCegarLoop]: Abstraction has 5666 states and 7447 transitions. [2019-11-06 22:53:34,408 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:53:34,408 INFO L276 IsEmpty]: Start isEmpty. Operand 5666 states and 7447 transitions. [2019-11-06 22:53:34,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2019-11-06 22:53:34,424 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:53:34,424 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, 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] [2019-11-06 22:53:34,424 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:53:34,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:53:34,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1795663703, now seen corresponding path program 1 times [2019-11-06 22:53:34,425 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:53:34,425 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024111105] [2019-11-06 22:53:34,426 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:53:34,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:53:34,766 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 90 proven. 65 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:53:34,767 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024111105] [2019-11-06 22:53:34,767 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296671623] [2019-11-06 22:53:34,767 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 22:53:34,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:53:34,867 INFO L256 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:53:34,878 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:53:35,089 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-11-06 22:53:35,090 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:53:35,263 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 90 proven. 65 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:53:35,264 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:53:35,264 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-11-06 22:53:35,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203227239] [2019-11-06 22:53:35,266 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:53:35,266 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:53:35,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:53:35,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:53:35,267 INFO L87 Difference]: Start difference. First operand 5666 states and 7447 transitions. Second operand 5 states. [2019-11-06 22:53:39,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:53:39,731 INFO L93 Difference]: Finished difference Result 11445 states and 15158 transitions. [2019-11-06 22:53:39,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:53:39,732 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 220 [2019-11-06 22:53:39,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:53:39,757 INFO L225 Difference]: With dead ends: 11445 [2019-11-06 22:53:39,757 INFO L226 Difference]: Without dead ends: 5785 [2019-11-06 22:53:39,770 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 435 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-11-06 22:53:39,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5785 states. [2019-11-06 22:53:39,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5785 to 5458. [2019-11-06 22:53:39,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5458 states. [2019-11-06 22:53:39,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5458 states to 5458 states and 6692 transitions. [2019-11-06 22:53:39,900 INFO L78 Accepts]: Start accepts. Automaton has 5458 states and 6692 transitions. Word has length 220 [2019-11-06 22:53:39,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:53:39,902 INFO L462 AbstractCegarLoop]: Abstraction has 5458 states and 6692 transitions. [2019-11-06 22:53:39,902 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:53:39,902 INFO L276 IsEmpty]: Start isEmpty. Operand 5458 states and 6692 transitions. [2019-11-06 22:53:39,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2019-11-06 22:53:39,910 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:53:39,911 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:53:40,115 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:53:40,115 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:53:40,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:53:40,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1319110833, now seen corresponding path program 1 times [2019-11-06 22:53:40,116 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:53:40,116 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589324456] [2019-11-06 22:53:40,116 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:53:40,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:53:40,794 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 111 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:53:40,795 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589324456] [2019-11-06 22:53:40,795 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496026215] [2019-11-06 22:53:40,796 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 22:53:40,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:53:40,936 INFO L256 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-06 22:53:40,956 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:53:41,021 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 22:53:41,271 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-11-06 22:53:41,272 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:53:41,387 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:53:41,389 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:53:41,423 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:53:41,424 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:53:41,425 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:53:41,635 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:53:42,509 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 90 proven. 65 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:53:42,510 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:53:42,510 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 5] total 13 [2019-11-06 22:53:42,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459817749] [2019-11-06 22:53:42,511 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:53:42,511 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:53:42,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:53:42,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-11-06 22:53:42,512 INFO L87 Difference]: Start difference. First operand 5458 states and 6692 transitions. Second operand 5 states. [2019-11-06 22:53:47,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:53:47,114 INFO L93 Difference]: Finished difference Result 11345 states and 13939 transitions. [2019-11-06 22:53:47,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:53:47,115 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 372 [2019-11-06 22:53:47,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:53:47,143 INFO L225 Difference]: With dead ends: 11345 [2019-11-06 22:53:47,143 INFO L226 Difference]: Without dead ends: 5893 [2019-11-06 22:53:47,158 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 754 GetRequests, 740 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2019-11-06 22:53:47,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5893 states. [2019-11-06 22:53:47,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5893 to 5525. [2019-11-06 22:53:47,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5525 states. [2019-11-06 22:53:47,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5525 states to 5525 states and 6781 transitions. [2019-11-06 22:53:47,342 INFO L78 Accepts]: Start accepts. Automaton has 5525 states and 6781 transitions. Word has length 372 [2019-11-06 22:53:47,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:53:47,342 INFO L462 AbstractCegarLoop]: Abstraction has 5525 states and 6781 transitions. [2019-11-06 22:53:47,343 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:53:47,343 INFO L276 IsEmpty]: Start isEmpty. Operand 5525 states and 6781 transitions. [2019-11-06 22:53:47,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2019-11-06 22:53:47,351 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:53:47,351 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:53:47,563 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:53:47,563 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:53:47,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:53:47,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1389844065, now seen corresponding path program 1 times [2019-11-06 22:53:47,564 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:53:47,564 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580440281] [2019-11-06 22:53:47,564 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:53:47,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:53:48,272 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-11-06 22:53:48,273 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580440281] [2019-11-06 22:53:48,273 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632998220] [2019-11-06 22:53:48,274 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 22:53:48,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:53:48,413 INFO L256 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 22:53:48,420 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:53:48,458 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:53:48,459 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:53:48,459 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:53:48,463 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:53:48,464 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:53:48,464 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:53:48,467 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:53:48,468 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms