/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_label02.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:53:51,026 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:53:51,028 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:53:51,040 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:53:51,079 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:53:51,080 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:53:51,085 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:53:51,086 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 22:53:51,109 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:53:51,109 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:53:51,111 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:53:51,111 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:53:51,111 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:53:51,112 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:53:51,112 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:53:51,112 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:53:51,112 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:53:51,112 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:53:51,113 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:53:51,114 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:53:51,114 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:53:51,114 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:53:51,114 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:53:51,115 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:53:51,115 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:53:51,115 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:53:51,115 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:53:51,115 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:53:51,116 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:53:51,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:53:51,116 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:53:51,116 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:53:51,116 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:53:51,117 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:53:51,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:53:51,117 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:53:51,117 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-11-06 22:53:51,406 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:53:51,425 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:53:51,429 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:53:51,430 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:53:51,430 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:53:51,431 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label02.c [2019-11-06 22:53:51,508 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0a0cda93/a6aa870a52524ae8ba552318627f410a/FLAGe35720bdf [2019-11-06 22:53:52,194 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:53:52,195 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label02.c [2019-11-06 22:53:52,211 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0a0cda93/a6aa870a52524ae8ba552318627f410a/FLAGe35720bdf [2019-11-06 22:53:52,326 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0a0cda93/a6aa870a52524ae8ba552318627f410a [2019-11-06 22:53:52,334 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:53:52,336 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:53:52,337 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:53:52,337 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:53:52,341 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:53:52,342 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:53:52" (1/1) ... [2019-11-06 22:53:52,345 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51205e68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:52, skipping insertion in model container [2019-11-06 22:53:52,345 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:53:52" (1/1) ... [2019-11-06 22:53:52,353 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:53:52,420 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:53:53,376 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:53:53,392 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:53:53,730 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:53:53,751 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:53:53,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:53 WrapperNode [2019-11-06 22:53:53,753 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:53:53,754 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:53:53,754 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:53:53,754 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:53:53,773 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:53" (1/1) ... [2019-11-06 22:53:53,773 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:53" (1/1) ... [2019-11-06 22:53:53,827 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:53" (1/1) ... [2019-11-06 22:53:53,828 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:53" (1/1) ... [2019-11-06 22:53:53,907 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:53" (1/1) ... [2019-11-06 22:53:53,924 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:53" (1/1) ... [2019-11-06 22:53:53,941 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:53" (1/1) ... [2019-11-06 22:53:53,958 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:53:53,959 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:53:53,959 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:53:53,959 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:53:53,960 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:53" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:53:54,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:53:54,029 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:53:54,029 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:53:54,029 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:53:54,030 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:53:54,030 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:53:54,030 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:53:54,030 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:53:54,031 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:53:54,031 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:53:54,031 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:53:54,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:53:54,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:53:56,407 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:53:56,408 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:53:56,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:53:56 BoogieIcfgContainer [2019-11-06 22:53:56,410 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:53:56,411 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:53:56,411 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:53:56,414 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:53:56,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:53:52" (1/3) ... [2019-11-06 22:53:56,416 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75a789c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:53:56, skipping insertion in model container [2019-11-06 22:53:56,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:53" (2/3) ... [2019-11-06 22:53:56,416 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75a789c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:53:56, skipping insertion in model container [2019-11-06 22:53:56,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:53:56" (3/3) ... [2019-11-06 22:53:56,419 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label02.c [2019-11-06 22:53:56,429 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:53:56,438 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:53:56,450 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:53:56,497 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:53:56,497 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:53:56,498 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:53:56,499 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:53:56,499 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:53:56,499 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:53:56,499 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:53:56,499 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:53:56,534 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-11-06 22:53:56,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-06 22:53:56,542 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:53:56,543 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, 1, 1, 1, 1] [2019-11-06 22:53:56,545 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:53:56,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:53:56,551 INFO L82 PathProgramCache]: Analyzing trace with hash -64019710, now seen corresponding path program 1 times [2019-11-06 22:53:56,561 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:53:56,562 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738229544] [2019-11-06 22:53:56,562 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:53:56,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:53:56,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:53:56,931 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738229544] [2019-11-06 22:53:56,932 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:53:56,932 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:53:56,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277105329] [2019-11-06 22:53:56,939 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:53:56,941 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:53:56,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:53:56,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:53:56,959 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 4 states. [2019-11-06 22:54:00,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:00,738 INFO L93 Difference]: Finished difference Result 1509 states and 2834 transitions. [2019-11-06 22:54:00,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:54:00,742 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2019-11-06 22:54:00,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:00,782 INFO L225 Difference]: With dead ends: 1509 [2019-11-06 22:54:00,782 INFO L226 Difference]: Without dead ends: 1019 [2019-11-06 22:54:00,795 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:54:00,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2019-11-06 22:54:00,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 1019. [2019-11-06 22:54:00,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1019 states. [2019-11-06 22:54:00,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 1739 transitions. [2019-11-06 22:54:00,925 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 1739 transitions. Word has length 67 [2019-11-06 22:54:00,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:00,926 INFO L462 AbstractCegarLoop]: Abstraction has 1019 states and 1739 transitions. [2019-11-06 22:54:00,926 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:54:00,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 1739 transitions. [2019-11-06 22:54:00,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-11-06 22:54:00,937 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:00,937 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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:54:00,939 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:00,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:00,939 INFO L82 PathProgramCache]: Analyzing trace with hash -2118195102, now seen corresponding path program 1 times [2019-11-06 22:54:00,940 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:00,940 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938805933] [2019-11-06 22:54:00,940 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:01,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:01,162 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:54:01,163 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938805933] [2019-11-06 22:54:01,163 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:54:01,163 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:54:01,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094208623] [2019-11-06 22:54:01,165 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:54:01,166 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:01,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:54:01,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:54:01,167 INFO L87 Difference]: Start difference. First operand 1019 states and 1739 transitions. Second operand 6 states. [2019-11-06 22:54:04,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:04,000 INFO L93 Difference]: Finished difference Result 3097 states and 5370 transitions. [2019-11-06 22:54:04,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:54:04,001 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 137 [2019-11-06 22:54:04,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:04,023 INFO L225 Difference]: With dead ends: 3097 [2019-11-06 22:54:04,023 INFO L226 Difference]: Without dead ends: 2084 [2019-11-06 22:54:04,027 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 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 22:54:04,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2084 states. [2019-11-06 22:54:04,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2084 to 2061. [2019-11-06 22:54:04,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2061 states. [2019-11-06 22:54:04,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2061 states to 2061 states and 3384 transitions. [2019-11-06 22:54:04,152 INFO L78 Accepts]: Start accepts. Automaton has 2061 states and 3384 transitions. Word has length 137 [2019-11-06 22:54:04,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:04,156 INFO L462 AbstractCegarLoop]: Abstraction has 2061 states and 3384 transitions. [2019-11-06 22:54:04,156 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:54:04,156 INFO L276 IsEmpty]: Start isEmpty. Operand 2061 states and 3384 transitions. [2019-11-06 22:54:04,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-11-06 22:54:04,174 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:04,175 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, 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] [2019-11-06 22:54:04,175 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:04,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:04,177 INFO L82 PathProgramCache]: Analyzing trace with hash -287717798, now seen corresponding path program 1 times [2019-11-06 22:54:04,178 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:04,178 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370362721] [2019-11-06 22:54:04,179 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:04,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:04,504 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:54:04,505 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370362721] [2019-11-06 22:54:04,506 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:54:04,507 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:54:04,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904248644] [2019-11-06 22:54:04,510 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:54:04,510 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:04,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:54:04,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:54:04,511 INFO L87 Difference]: Start difference. First operand 2061 states and 3384 transitions. Second operand 6 states. [2019-11-06 22:54:07,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:07,375 INFO L93 Difference]: Finished difference Result 5904 states and 10021 transitions. [2019-11-06 22:54:07,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:54:07,375 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 165 [2019-11-06 22:54:07,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:07,402 INFO L225 Difference]: With dead ends: 5904 [2019-11-06 22:54:07,402 INFO L226 Difference]: Without dead ends: 3849 [2019-11-06 22:54:07,409 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 22:54:07,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3849 states. [2019-11-06 22:54:07,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3849 to 3813. [2019-11-06 22:54:07,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3813 states. [2019-11-06 22:54:07,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3813 states to 3813 states and 6183 transitions. [2019-11-06 22:54:07,578 INFO L78 Accepts]: Start accepts. Automaton has 3813 states and 6183 transitions. Word has length 165 [2019-11-06 22:54:07,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:07,580 INFO L462 AbstractCegarLoop]: Abstraction has 3813 states and 6183 transitions. [2019-11-06 22:54:07,580 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:54:07,580 INFO L276 IsEmpty]: Start isEmpty. Operand 3813 states and 6183 transitions. [2019-11-06 22:54:07,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-11-06 22:54:07,585 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:07,585 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, 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] [2019-11-06 22:54:07,586 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:07,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:07,586 INFO L82 PathProgramCache]: Analyzing trace with hash 319632798, now seen corresponding path program 1 times [2019-11-06 22:54:07,587 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:07,587 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692611249] [2019-11-06 22:54:07,588 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:07,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:07,781 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:54:07,781 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692611249] [2019-11-06 22:54:07,781 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:54:07,782 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:54:07,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664003621] [2019-11-06 22:54:07,782 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:54:07,783 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:07,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:54:07,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:54:07,783 INFO L87 Difference]: Start difference. First operand 3813 states and 6183 transitions. Second operand 6 states. [2019-11-06 22:54:10,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:10,459 INFO L93 Difference]: Finished difference Result 9749 states and 16101 transitions. [2019-11-06 22:54:10,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:54:10,459 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 183 [2019-11-06 22:54:10,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:10,493 INFO L225 Difference]: With dead ends: 9749 [2019-11-06 22:54:10,493 INFO L226 Difference]: Without dead ends: 5942 [2019-11-06 22:54:10,505 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 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 22:54:10,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5942 states. [2019-11-06 22:54:10,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5942 to 5896. [2019-11-06 22:54:10,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5896 states. [2019-11-06 22:54:10,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5896 states to 5896 states and 8054 transitions. [2019-11-06 22:54:10,661 INFO L78 Accepts]: Start accepts. Automaton has 5896 states and 8054 transitions. Word has length 183 [2019-11-06 22:54:10,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:10,662 INFO L462 AbstractCegarLoop]: Abstraction has 5896 states and 8054 transitions. [2019-11-06 22:54:10,662 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:54:10,662 INFO L276 IsEmpty]: Start isEmpty. Operand 5896 states and 8054 transitions. [2019-11-06 22:54:10,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2019-11-06 22:54:10,666 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:10,666 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, 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] [2019-11-06 22:54:10,666 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:10,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:10,667 INFO L82 PathProgramCache]: Analyzing trace with hash 511639243, now seen corresponding path program 1 times [2019-11-06 22:54:10,667 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:10,667 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570921583] [2019-11-06 22:54:10,667 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:10,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:10,889 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:54:10,890 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570921583] [2019-11-06 22:54:10,890 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:54:10,890 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:54:10,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105572502] [2019-11-06 22:54:10,891 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:54:10,892 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:10,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:54:10,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:54:10,893 INFO L87 Difference]: Start difference. First operand 5896 states and 8054 transitions. Second operand 6 states. [2019-11-06 22:54:13,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:13,526 INFO L93 Difference]: Finished difference Result 14575 states and 20025 transitions. [2019-11-06 22:54:13,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:54:13,532 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 230 [2019-11-06 22:54:13,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:13,570 INFO L225 Difference]: With dead ends: 14575 [2019-11-06 22:54:13,571 INFO L226 Difference]: Without dead ends: 8685 [2019-11-06 22:54:13,586 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 22:54:13,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8685 states. [2019-11-06 22:54:13,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8685 to 8651. [2019-11-06 22:54:13,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8651 states. [2019-11-06 22:54:13,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8651 states to 8651 states and 11412 transitions. [2019-11-06 22:54:13,800 INFO L78 Accepts]: Start accepts. Automaton has 8651 states and 11412 transitions. Word has length 230 [2019-11-06 22:54:13,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:13,801 INFO L462 AbstractCegarLoop]: Abstraction has 8651 states and 11412 transitions. [2019-11-06 22:54:13,801 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:54:13,801 INFO L276 IsEmpty]: Start isEmpty. Operand 8651 states and 11412 transitions. [2019-11-06 22:54:13,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2019-11-06 22:54:13,809 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:13,810 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, 3, 3, 3, 3, 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] [2019-11-06 22:54:13,810 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:13,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:13,811 INFO L82 PathProgramCache]: Analyzing trace with hash -71690297, now seen corresponding path program 1 times [2019-11-06 22:54:13,811 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:13,812 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647412828] [2019-11-06 22:54:13,812 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:13,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:14,082 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-06 22:54:14,083 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647412828] [2019-11-06 22:54:14,083 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:54:14,083 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:54:14,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461227153] [2019-11-06 22:54:14,084 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:54:14,084 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:14,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:54:14,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:54:14,085 INFO L87 Difference]: Start difference. First operand 8651 states and 11412 transitions. Second operand 4 states. [2019-11-06 22:54:17,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:17,385 INFO L93 Difference]: Finished difference Result 23062 states and 30672 transitions. [2019-11-06 22:54:17,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:54:17,385 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 266 [2019-11-06 22:54:17,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:17,452 INFO L225 Difference]: With dead ends: 23062 [2019-11-06 22:54:17,452 INFO L226 Difference]: Without dead ends: 14417 [2019-11-06 22:54:17,475 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:54:17,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14417 states. [2019-11-06 22:54:17,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14417 to 13741. [2019-11-06 22:54:17,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13741 states. [2019-11-06 22:54:17,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13741 states to 13741 states and 17133 transitions. [2019-11-06 22:54:17,793 INFO L78 Accepts]: Start accepts. Automaton has 13741 states and 17133 transitions. Word has length 266 [2019-11-06 22:54:17,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:17,795 INFO L462 AbstractCegarLoop]: Abstraction has 13741 states and 17133 transitions. [2019-11-06 22:54:17,795 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:54:17,795 INFO L276 IsEmpty]: Start isEmpty. Operand 13741 states and 17133 transitions. [2019-11-06 22:54:17,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2019-11-06 22:54:17,814 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:17,814 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 22:54:17,815 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:17,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:17,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1075441394, now seen corresponding path program 1 times [2019-11-06 22:54:17,824 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:17,824 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725984586] [2019-11-06 22:54:17,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:17,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:18,657 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-11-06 22:54:18,659 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725984586] [2019-11-06 22:54:18,659 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951856667] [2019-11-06 22:54:18,659 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 22:54:18,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:18,840 INFO L256 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-06 22:54:18,882 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:54:19,133 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2019-11-06 22:54:19,450 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-11-06 22:54:19,451 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:54:19,505 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:54:19,506 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:54:19,515 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:54:19,672 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:54:19,672 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:54:19,674 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:54:19,822 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 34 [2019-11-06 22:54:22,163 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-11-06 22:54:22,163 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [157680655] [2019-11-06 22:54:22,168 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 490 [2019-11-06 22:54:22,248 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:54:22,248 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)