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/Problem11_label20.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:03:12,923 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:03:12,926 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:03:12,943 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 00:03:12,967 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:03:12,969 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:03:12,972 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:03:12,973 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:03:12,974 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:03:12,976 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:03:12,977 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:03:12,980 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:03:12,981 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:03:12,982 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:03:12,985 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:03:12,986 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:03:12,988 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:03:12,998 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:03:13,000 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:03:13,001 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:03:13,002 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 00:03:13,022 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:03:13,023 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:03:13,025 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:03:13,025 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:03:13,025 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:03:13,025 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:03:13,026 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:03:13,026 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:03:13,026 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:03:13,026 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:03:13,027 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:03:13,027 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:03:13,028 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:03:13,028 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:03:13,028 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:03:13,028 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:03:13,028 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:03:13,029 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:03:13,029 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:03:13,029 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:03:13,029 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:03:13,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:03:13,030 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:03:13,030 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:03:13,030 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:03:13,030 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:03:13,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:03:13,031 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:03:13,031 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 [2019-10-15 00:03:13,313 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:03:13,326 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:03:13,330 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:03:13,331 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:03:13,331 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:03:13,332 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label20.c [2019-10-15 00:03:13,389 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4234aae2/94cdf9bfeaeb40449281472b062acaff/FLAG74846002c [2019-10-15 00:03:13,988 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:03:13,989 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label20.c [2019-10-15 00:03:14,002 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4234aae2/94cdf9bfeaeb40449281472b062acaff/FLAG74846002c [2019-10-15 00:03:14,210 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4234aae2/94cdf9bfeaeb40449281472b062acaff [2019-10-15 00:03:14,223 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:03:14,224 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:03:14,229 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:03:14,229 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:03:14,233 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:03:14,234 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:03:14" (1/1) ... [2019-10-15 00:03:14,237 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e53d70d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:14, skipping insertion in model container [2019-10-15 00:03:14,237 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:03:14" (1/1) ... [2019-10-15 00:03:14,245 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:03:14,319 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:03:15,035 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:03:15,040 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:03:15,268 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:03:15,292 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:03:15,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:15 WrapperNode [2019-10-15 00:03:15,294 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:03:15,295 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:03:15,295 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:03:15,295 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:03:15,314 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:15" (1/1) ... [2019-10-15 00:03:15,315 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:15" (1/1) ... [2019-10-15 00:03:15,357 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:15" (1/1) ... [2019-10-15 00:03:15,360 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:15" (1/1) ... [2019-10-15 00:03:15,417 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:15" (1/1) ... [2019-10-15 00:03:15,431 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:15" (1/1) ... [2019-10-15 00:03:15,440 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:15" (1/1) ... [2019-10-15 00:03:15,454 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:03:15,455 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:03:15,455 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:03:15,455 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:03:15,456 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:15" (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 [2019-10-15 00:03:15,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:03:15,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:03:15,546 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:03:15,546 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:03:15,546 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:03:15,547 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:03:15,547 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:03:15,548 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:03:15,548 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:03:15,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:03:15,549 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:03:17,283 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:03:17,283 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:03:17,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:03:17 BoogieIcfgContainer [2019-10-15 00:03:17,285 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:03:17,287 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:03:17,287 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:03:17,290 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:03:17,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:03:14" (1/3) ... [2019-10-15 00:03:17,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68985389 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:03:17, skipping insertion in model container [2019-10-15 00:03:17,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:15" (2/3) ... [2019-10-15 00:03:17,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68985389 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:03:17, skipping insertion in model container [2019-10-15 00:03:17,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:03:17" (3/3) ... [2019-10-15 00:03:17,295 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label20.c [2019-10-15 00:03:17,305 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:03:17,315 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:03:17,327 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:03:17,389 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:03:17,389 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:03:17,389 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:03:17,390 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:03:17,390 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:03:17,390 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:03:17,390 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:03:17,390 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:03:17,436 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-15 00:03:17,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-15 00:03:17,446 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:03:17,448 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:03:17,449 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:03:17,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:03:17,456 INFO L82 PathProgramCache]: Analyzing trace with hash -960649190, now seen corresponding path program 1 times [2019-10-15 00:03:17,467 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:03:17,468 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727493123] [2019-10-15 00:03:17,468 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:17,468 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:17,468 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:03:17,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:17,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:03:17,789 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727493123] [2019-10-15 00:03:17,790 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:03:17,793 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:03:17,793 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005934252] [2019-10-15 00:03:17,798 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:03:17,800 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:03:17,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:03:17,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:03:17,819 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 4 states. [2019-10-15 00:03:19,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:03:19,866 INFO L93 Difference]: Finished difference Result 978 states and 1754 transitions. [2019-10-15 00:03:19,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:03:19,872 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-10-15 00:03:19,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:03:19,894 INFO L225 Difference]: With dead ends: 978 [2019-10-15 00:03:19,894 INFO L226 Difference]: Without dead ends: 619 [2019-10-15 00:03:19,903 INFO L600 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 [2019-10-15 00:03:19,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2019-10-15 00:03:20,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 619. [2019-10-15 00:03:20,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 619 states. [2019-10-15 00:03:20,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 859 transitions. [2019-10-15 00:03:20,013 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 859 transitions. Word has length 15 [2019-10-15 00:03:20,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:03:20,014 INFO L462 AbstractCegarLoop]: Abstraction has 619 states and 859 transitions. [2019-10-15 00:03:20,014 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:03:20,014 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 859 transitions. [2019-10-15 00:03:20,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-10-15 00:03:20,019 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:03:20,019 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 00:03:20,019 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:03:20,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:03:20,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1986341175, now seen corresponding path program 1 times [2019-10-15 00:03:20,020 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:03:20,020 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713980197] [2019-10-15 00:03:20,020 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:20,021 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:20,021 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:03:20,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:20,219 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:03:20,220 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713980197] [2019-10-15 00:03:20,220 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:03:20,220 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:03:20,221 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576560992] [2019-10-15 00:03:20,225 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:03:20,226 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:03:20,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:03:20,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:03:20,226 INFO L87 Difference]: Start difference. First operand 619 states and 859 transitions. Second operand 4 states. [2019-10-15 00:03:22,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:03:22,172 INFO L93 Difference]: Finished difference Result 2382 states and 3379 transitions. [2019-10-15 00:03:22,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:03:22,173 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 88 [2019-10-15 00:03:22,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:03:22,185 INFO L225 Difference]: With dead ends: 2382 [2019-10-15 00:03:22,186 INFO L226 Difference]: Without dead ends: 1769 [2019-10-15 00:03:22,188 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:03:22,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1769 states. [2019-10-15 00:03:22,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1769 to 1751. [2019-10-15 00:03:22,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1751 states. [2019-10-15 00:03:22,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1751 states to 1751 states and 2367 transitions. [2019-10-15 00:03:22,261 INFO L78 Accepts]: Start accepts. Automaton has 1751 states and 2367 transitions. Word has length 88 [2019-10-15 00:03:22,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:03:22,262 INFO L462 AbstractCegarLoop]: Abstraction has 1751 states and 2367 transitions. [2019-10-15 00:03:22,262 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:03:22,263 INFO L276 IsEmpty]: Start isEmpty. Operand 1751 states and 2367 transitions. [2019-10-15 00:03:22,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-10-15 00:03:22,268 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:03:22,268 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 00:03:22,269 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:03:22,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:03:22,269 INFO L82 PathProgramCache]: Analyzing trace with hash 2070996454, now seen corresponding path program 1 times [2019-10-15 00:03:22,270 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:03:22,270 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068874551] [2019-10-15 00:03:22,270 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:22,270 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:22,270 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:03:22,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:22,573 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:03:22,573 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068874551] [2019-10-15 00:03:22,574 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340415681] [2019-10-15 00:03:22,574 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 [2019-10-15 00:03:22,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:22,694 INFO L256 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-15 00:03:22,714 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:03:22,826 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-15 00:03:22,892 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:03:22,893 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:03:23,078 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2019-10-15 00:03:23,117 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:03:23,118 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:03:23,119 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:03:23,126 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:03:23,132 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-15 00:03:23,136 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:03:23,137 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:03:23,142 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-15 00:03:23,145 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:03:23,237 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:03:23,397 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:03:23,398 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 00:03:23,398 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [7] total 12 [2019-10-15 00:03:23,398 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557656738] [2019-10-15 00:03:23,402 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 00:03:23,403 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:03:23,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 00:03:23,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-10-15 00:03:23,404 INFO L87 Difference]: Start difference. First operand 1751 states and 2367 transitions. Second operand 7 states. [2019-10-15 00:03:26,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:03:26,294 INFO L93 Difference]: Finished difference Result 5696 states and 8124 transitions. [2019-10-15 00:03:26,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-15 00:03:26,295 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 109 [2019-10-15 00:03:26,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:03:26,330 INFO L225 Difference]: With dead ends: 5696 [2019-10-15 00:03:26,330 INFO L226 Difference]: Without dead ends: 3951 [2019-10-15 00:03:26,337 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 215 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2019-10-15 00:03:26,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3951 states. [2019-10-15 00:03:26,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3951 to 3350. [2019-10-15 00:03:26,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3350 states. [2019-10-15 00:03:26,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3350 states to 3350 states and 4400 transitions. [2019-10-15 00:03:26,508 INFO L78 Accepts]: Start accepts. Automaton has 3350 states and 4400 transitions. Word has length 109 [2019-10-15 00:03:26,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:03:26,509 INFO L462 AbstractCegarLoop]: Abstraction has 3350 states and 4400 transitions. [2019-10-15 00:03:26,509 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 00:03:26,509 INFO L276 IsEmpty]: Start isEmpty. Operand 3350 states and 4400 transitions. [2019-10-15 00:03:26,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2019-10-15 00:03:26,527 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:03:26,528 INFO L380 BasicCegarLoop]: trace histogram [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, 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] [2019-10-15 00:03:26,732 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:03:26,732 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:03:26,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:03:26,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1839013324, now seen corresponding path program 1 times [2019-10-15 00:03:26,733 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:03:26,733 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478477481] [2019-10-15 00:03:26,733 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:26,733 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:26,734 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:03:26,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:27,086 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 16 proven. 68 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:03:27,086 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478477481] [2019-10-15 00:03:27,087 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915296632] [2019-10-15 00:03:27,087 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 [2019-10-15 00:03:27,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:27,211 INFO L256 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 00:03:27,219 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:03:27,282 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-15 00:03:27,282 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:03:27,394 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 16 proven. 68 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:03:27,395 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:03:27,395 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-15 00:03:27,395 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408454021] [2019-10-15 00:03:27,396 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:03:27,397 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:03:27,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:03:27,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-10-15 00:03:27,397 INFO L87 Difference]: Start difference. First operand 3350 states and 4400 transitions. Second operand 5 states. [2019-10-15 00:03:29,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:03:29,215 INFO L93 Difference]: Finished difference Result 7359 states and 9840 transitions. [2019-10-15 00:03:29,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:03:29,217 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 228 [2019-10-15 00:03:29,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:03:29,237 INFO L225 Difference]: With dead ends: 7359 [2019-10-15 00:03:29,237 INFO L226 Difference]: Without dead ends: 4015 [2019-10-15 00:03:29,247 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 452 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-15 00:03:29,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4015 states. [2019-10-15 00:03:29,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4015 to 3962. [2019-10-15 00:03:29,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3962 states. [2019-10-15 00:03:29,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3962 states to 3962 states and 5038 transitions. [2019-10-15 00:03:29,356 INFO L78 Accepts]: Start accepts. Automaton has 3962 states and 5038 transitions. Word has length 228 [2019-10-15 00:03:29,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:03:29,357 INFO L462 AbstractCegarLoop]: Abstraction has 3962 states and 5038 transitions. [2019-10-15 00:03:29,357 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:03:29,358 INFO L276 IsEmpty]: Start isEmpty. Operand 3962 states and 5038 transitions. [2019-10-15 00:03:29,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2019-10-15 00:03:29,364 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:03:29,365 INFO L380 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1] [2019-10-15 00:03:29,568 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:03:29,568 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:03:29,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:03:29,569 INFO L82 PathProgramCache]: Analyzing trace with hash 516745845, now seen corresponding path program 1 times [2019-10-15 00:03:29,569 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:03:29,570 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669711747] [2019-10-15 00:03:29,570 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:29,571 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:29,571 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:03:29,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:29,766 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2019-10-15 00:03:29,766 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669711747] [2019-10-15 00:03:29,766 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:03:29,767 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:03:29,767 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409059924] [2019-10-15 00:03:29,768 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:03:29,769 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:03:29,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:03:29,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:03:29,769 INFO L87 Difference]: Start difference. First operand 3962 states and 5038 transitions. Second operand 3 states. [2019-10-15 00:03:30,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:03:30,966 INFO L93 Difference]: Finished difference Result 8309 states and 10883 transitions. [2019-10-15 00:03:30,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:03:30,981 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 237 [2019-10-15 00:03:30,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:03:31,010 INFO L225 Difference]: With dead ends: 8309 [2019-10-15 00:03:31,011 INFO L226 Difference]: Without dead ends: 4541 [2019-10-15 00:03:31,022 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:03:31,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4541 states. [2019-10-15 00:03:31,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4541 to 4539. [2019-10-15 00:03:31,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4539 states. [2019-10-15 00:03:31,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4539 states to 4539 states and 5828 transitions. [2019-10-15 00:03:31,167 INFO L78 Accepts]: Start accepts. Automaton has 4539 states and 5828 transitions. Word has length 237 [2019-10-15 00:03:31,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:03:31,168 INFO L462 AbstractCegarLoop]: Abstraction has 4539 states and 5828 transitions. [2019-10-15 00:03:31,168 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:03:31,168 INFO L276 IsEmpty]: Start isEmpty. Operand 4539 states and 5828 transitions. [2019-10-15 00:03:31,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2019-10-15 00:03:31,173 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:03:31,174 INFO L380 BasicCegarLoop]: trace histogram [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, 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, 1, 1] [2019-10-15 00:03:31,174 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:03:31,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:03:31,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1474293502, now seen corresponding path program 1 times [2019-10-15 00:03:31,175 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:03:31,175 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394762208] [2019-10-15 00:03:31,175 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:31,176 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:31,176 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:03:31,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:31,496 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2019-10-15 00:03:31,497 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394762208] [2019-10-15 00:03:31,497 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459500022] [2019-10-15 00:03:31,497 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 [2019-10-15 00:03:31,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:31,605 INFO L256 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 00:03:31,623 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:03:31,714 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-15 00:03:31,845 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 108 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:03:31,845 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:03:32,088 WARN L191 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2019-10-15 00:03:32,140 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:03:32,141 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:03:32,145 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-15 00:03:32,146 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:03:32,147 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:03:32,154 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:03:32,155 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:03:32,157 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:03:32,159 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:03:32,160 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:03:32,161 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:03:32,163 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-15 00:03:32,164 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:03:32,169 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:03:32,197 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:03:32,306 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:03:32,344 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:03:32,602 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 17 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:03:32,603 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1110489069] [2019-10-15 00:03:32,608 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 241 [2019-10-15 00:03:32,665 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:03:32,665 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)