/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/Problem16_label55.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:56:03,004 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:56:03,007 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:56:03,025 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:56:03,048 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:56:03,049 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:56:03,050 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:56:03,051 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:56:03,052 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:56:03,053 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:56:03,054 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:56:03,059 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:56:03,064 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:56:03,065 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:56:03,066 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:56:03,066 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:56:03,071 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:56:03,085 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:56:03,089 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:56:03,090 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:56:03,091 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 22:56:03,115 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:56:03,115 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:56:03,119 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:56:03,119 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:56:03,119 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:56:03,120 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:56:03,120 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:56:03,120 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:56:03,120 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:56:03,120 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:56:03,121 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:56:03,122 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:56:03,122 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:56:03,122 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:56:03,123 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:56:03,123 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:56:03,123 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:56:03,123 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:56:03,124 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:56:03,124 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:56:03,125 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:56:03,125 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:56:03,125 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:56:03,125 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:56:03,126 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:56:03,126 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:56:03,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:56:03,126 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:56:03,126 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 22:56:03,402 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:56:03,416 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:56:03,419 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:56:03,421 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:56:03,421 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:56:03,422 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label55.c [2019-11-06 22:56:03,483 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a5fe2453/bf2c1882573449668b1750256f9b91a2/FLAG2e05f74ff [2019-11-06 22:56:04,145 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:56:04,146 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label55.c [2019-11-06 22:56:04,167 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a5fe2453/bf2c1882573449668b1750256f9b91a2/FLAG2e05f74ff [2019-11-06 22:56:04,314 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a5fe2453/bf2c1882573449668b1750256f9b91a2 [2019-11-06 22:56:04,324 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:56:04,325 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:56:04,326 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:56:04,326 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:56:04,329 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:56:04,330 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:56:04" (1/1) ... [2019-11-06 22:56:04,333 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25f9a9b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:04, skipping insertion in model container [2019-11-06 22:56:04,333 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:56:04" (1/1) ... [2019-11-06 22:56:04,339 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:56:04,411 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:56:05,462 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:56:05,474 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:56:05,707 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:56:05,732 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:56:05,733 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:05 WrapperNode [2019-11-06 22:56:05,733 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:56:05,736 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:56:05,737 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:56:05,737 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:56:05,757 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:05" (1/1) ... [2019-11-06 22:56:05,758 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:05" (1/1) ... [2019-11-06 22:56:05,785 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:05" (1/1) ... [2019-11-06 22:56:05,785 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:05" (1/1) ... [2019-11-06 22:56:05,872 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:05" (1/1) ... [2019-11-06 22:56:05,890 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:05" (1/1) ... [2019-11-06 22:56:05,901 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:05" (1/1) ... [2019-11-06 22:56:05,917 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:56:05,920 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:56:05,920 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:56:05,920 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:56:05,922 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:05" (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 22:56:06,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:56:06,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:56:06,005 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:56:06,005 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:56:06,006 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:56:06,007 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:56:06,007 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:56:06,007 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:56:06,008 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:56:06,008 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:56:06,009 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:56:06,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:56:06,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:56:08,303 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:56:08,304 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:56:08,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:56:08 BoogieIcfgContainer [2019-11-06 22:56:08,310 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:56:08,311 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:56:08,311 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:56:08,315 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:56:08,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:56:04" (1/3) ... [2019-11-06 22:56:08,316 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4db37e7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:56:08, skipping insertion in model container [2019-11-06 22:56:08,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:05" (2/3) ... [2019-11-06 22:56:08,316 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4db37e7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:56:08, skipping insertion in model container [2019-11-06 22:56:08,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:56:08" (3/3) ... [2019-11-06 22:56:08,319 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label55.c [2019-11-06 22:56:08,329 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:56:08,338 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:56:08,350 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:56:08,380 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:56:08,380 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:56:08,381 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:56:08,381 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:56:08,381 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:56:08,381 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:56:08,381 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:56:08,381 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:56:08,412 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-11-06 22:56:08,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-06 22:56:08,422 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:56:08,423 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:56:08,425 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:56:08,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:56:08,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1859248590, now seen corresponding path program 1 times [2019-11-06 22:56:08,441 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:56:08,442 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397757456] [2019-11-06 22:56:08,442 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:56:08,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:08,811 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 22:56:08,812 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397757456] [2019-11-06 22:56:08,813 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:56:08,813 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:56:08,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857746107] [2019-11-06 22:56:08,820 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:56:08,822 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:56:08,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:56:08,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:56:08,840 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 3 states. [2019-11-06 22:56:11,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:56:11,182 INFO L93 Difference]: Finished difference Result 1153 states and 2141 transitions. [2019-11-06 22:56:11,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:56:11,189 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2019-11-06 22:56:11,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:56:11,220 INFO L225 Difference]: With dead ends: 1153 [2019-11-06 22:56:11,220 INFO L226 Difference]: Without dead ends: 682 [2019-11-06 22:56:11,233 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:56:11,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-11-06 22:56:11,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-11-06 22:56:11,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-11-06 22:56:11,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1190 transitions. [2019-11-06 22:56:11,347 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1190 transitions. Word has length 63 [2019-11-06 22:56:11,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:56:11,348 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1190 transitions. [2019-11-06 22:56:11,348 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:56:11,348 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1190 transitions. [2019-11-06 22:56:11,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-11-06 22:56:11,364 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:56:11,364 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:56:11,365 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:56:11,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:56:11,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1824970078, now seen corresponding path program 1 times [2019-11-06 22:56:11,367 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:56:11,367 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639616933] [2019-11-06 22:56:11,367 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:56:11,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:11,602 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:56:11,602 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639616933] [2019-11-06 22:56:11,602 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:56:11,603 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:56:11,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896145945] [2019-11-06 22:56:11,605 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:56:11,605 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:56:11,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:56:11,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:56:11,606 INFO L87 Difference]: Start difference. First operand 682 states and 1190 transitions. Second operand 6 states. [2019-11-06 22:56:14,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:56:14,313 INFO L93 Difference]: Finished difference Result 1730 states and 3016 transitions. [2019-11-06 22:56:14,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:56:14,318 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 155 [2019-11-06 22:56:14,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:56:14,328 INFO L225 Difference]: With dead ends: 1730 [2019-11-06 22:56:14,329 INFO L226 Difference]: Without dead ends: 1054 [2019-11-06 22:56:14,331 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:56:14,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2019-11-06 22:56:14,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 1034. [2019-11-06 22:56:14,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1034 states. [2019-11-06 22:56:14,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1692 transitions. [2019-11-06 22:56:14,372 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1692 transitions. Word has length 155 [2019-11-06 22:56:14,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:56:14,373 INFO L462 AbstractCegarLoop]: Abstraction has 1034 states and 1692 transitions. [2019-11-06 22:56:14,373 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:56:14,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1692 transitions. [2019-11-06 22:56:14,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2019-11-06 22:56:14,381 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:56:14,381 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-11-06 22:56:14,381 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:56:14,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:56:14,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1909961266, now seen corresponding path program 1 times [2019-11-06 22:56:14,382 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:56:14,382 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852064463] [2019-11-06 22:56:14,383 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:56:14,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:14,660 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 112 proven. 88 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:56:14,661 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852064463] [2019-11-06 22:56:14,661 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248836491] [2019-11-06 22:56:14,662 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 22:56:14,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:14,785 INFO L256 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:56:14,798 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:56:14,973 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 147 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-06 22:56:14,974 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:56:15,226 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 112 proven. 88 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:56:15,226 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:56:15,228 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-11-06 22:56:15,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850061359] [2019-11-06 22:56:15,240 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:56:15,241 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:56:15,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:56:15,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:56:15,242 INFO L87 Difference]: Start difference. First operand 1034 states and 1692 transitions. Second operand 5 states. [2019-11-06 22:56:18,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:56:18,932 INFO L93 Difference]: Finished difference Result 2427 states and 3968 transitions. [2019-11-06 22:56:18,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:56:18,933 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 265 [2019-11-06 22:56:18,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:56:18,950 INFO L225 Difference]: With dead ends: 2427 [2019-11-06 22:56:18,951 INFO L226 Difference]: Without dead ends: 1399 [2019-11-06 22:56:18,956 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 525 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-11-06 22:56:18,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1399 states. [2019-11-06 22:56:19,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1399 to 1388. [2019-11-06 22:56:19,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1388 states. [2019-11-06 22:56:19,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 2182 transitions. [2019-11-06 22:56:19,027 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 2182 transitions. Word has length 265 [2019-11-06 22:56:19,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:56:19,029 INFO L462 AbstractCegarLoop]: Abstraction has 1388 states and 2182 transitions. [2019-11-06 22:56:19,029 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:56:19,029 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 2182 transitions. [2019-11-06 22:56:19,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2019-11-06 22:56:19,042 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:56:19,043 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 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 22:56:19,249 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:56:19,250 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:56:19,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:56:19,251 INFO L82 PathProgramCache]: Analyzing trace with hash -495791769, now seen corresponding path program 1 times [2019-11-06 22:56:19,251 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:56:19,252 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273589424] [2019-11-06 22:56:19,252 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:56:19,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:19,605 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 168 proven. 142 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-06 22:56:19,606 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273589424] [2019-11-06 22:56:19,606 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336214100] [2019-11-06 22:56:19,606 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 22:56:19,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:19,730 INFO L256 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:56:19,739 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:56:19,891 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 204 proven. 0 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2019-11-06 22:56:19,891 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:56:20,077 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 168 proven. 142 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-06 22:56:20,077 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:56:20,078 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 9 [2019-11-06 22:56:20,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629608032] [2019-11-06 22:56:20,079 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:56:20,079 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:56:20,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:56:20,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:56:20,080 INFO L87 Difference]: Start difference. First operand 1388 states and 2182 transitions. Second operand 5 states. [2019-11-06 22:56:23,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:56:23,302 INFO L93 Difference]: Finished difference Result 4241 states and 6810 transitions. [2019-11-06 22:56:23,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:56:23,304 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 340 [2019-11-06 22:56:23,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:56:23,320 INFO L225 Difference]: With dead ends: 4241 [2019-11-06 22:56:23,320 INFO L226 Difference]: Without dead ends: 2859 [2019-11-06 22:56:23,324 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 689 GetRequests, 678 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:56:23,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2859 states. [2019-11-06 22:56:23,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2859 to 2819. [2019-11-06 22:56:23,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2819 states. [2019-11-06 22:56:23,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2819 states to 2819 states and 4287 transitions. [2019-11-06 22:56:23,406 INFO L78 Accepts]: Start accepts. Automaton has 2819 states and 4287 transitions. Word has length 340 [2019-11-06 22:56:23,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:56:23,407 INFO L462 AbstractCegarLoop]: Abstraction has 2819 states and 4287 transitions. [2019-11-06 22:56:23,407 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:56:23,407 INFO L276 IsEmpty]: Start isEmpty. Operand 2819 states and 4287 transitions. [2019-11-06 22:56:23,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2019-11-06 22:56:23,415 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:56:23,415 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 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 22:56:23,616 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:56:23,616 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:56:23,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:56:23,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1063616465, now seen corresponding path program 1 times [2019-11-06 22:56:23,617 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:56:23,618 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772766038] [2019-11-06 22:56:23,618 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:56:23,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:23,820 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 168 proven. 150 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-06 22:56:23,820 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772766038] [2019-11-06 22:56:23,820 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128838468] [2019-11-06 22:56:23,821 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 22:56:23,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:23,933 INFO L256 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:56:23,939 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:56:24,089 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 212 proven. 0 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2019-11-06 22:56:24,089 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:56:24,264 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 168 proven. 150 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-06 22:56:24,265 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:56:24,265 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-11-06 22:56:24,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695204034] [2019-11-06 22:56:24,266 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:56:24,267 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:56:24,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:56:24,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:56:24,267 INFO L87 Difference]: Start difference. First operand 2819 states and 4287 transitions. Second operand 5 states. [2019-11-06 22:56:26,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:56:26,968 INFO L93 Difference]: Finished difference Result 8487 states and 13372 transitions. [2019-11-06 22:56:26,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:56:26,969 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 344 [2019-11-06 22:56:26,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:56:27,003 INFO L225 Difference]: With dead ends: 8487 [2019-11-06 22:56:27,004 INFO L226 Difference]: Without dead ends: 5674 [2019-11-06 22:56:27,014 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 697 GetRequests, 683 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-11-06 22:56:27,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5674 states. [2019-11-06 22:56:27,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5674 to 5640. [2019-11-06 22:56:27,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5640 states. [2019-11-06 22:56:27,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5640 states to 5640 states and 7783 transitions. [2019-11-06 22:56:27,180 INFO L78 Accepts]: Start accepts. Automaton has 5640 states and 7783 transitions. Word has length 344 [2019-11-06 22:56:27,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:56:27,181 INFO L462 AbstractCegarLoop]: Abstraction has 5640 states and 7783 transitions. [2019-11-06 22:56:27,181 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:56:27,181 INFO L276 IsEmpty]: Start isEmpty. Operand 5640 states and 7783 transitions. [2019-11-06 22:56:27,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2019-11-06 22:56:27,191 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:56:27,192 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:56:27,402 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:56:27,402 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:56:27,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:56:27,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1181974966, now seen corresponding path program 1 times [2019-11-06 22:56:27,412 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:56:27,412 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998313123] [2019-11-06 22:56:27,412 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:56:27,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:27,990 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2019-11-06 22:56:28,634 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 201 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:56:28,634 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998313123] [2019-11-06 22:56:28,635 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521770096] [2019-11-06 22:56:28,635 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:56:28,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:28,740 INFO L256 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:56:28,745 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:56:28,905 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 201 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:56:28,906 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:56:29,179 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 201 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:56:29,179 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [276618752] [2019-11-06 22:56:29,185 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 370 [2019-11-06 22:56:29,246 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:56:29,247 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-11-06 22:56:33,577 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.