/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/Problem02_label47.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:36:20,255 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:36:20,258 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:36:20,277 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:36:20,300 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:36:20,302 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:36:20,303 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:36:20,305 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:36:20,306 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:36:20,307 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:36:20,308 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:36:20,311 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:36:20,312 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:36:20,313 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:36:20,314 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:36:20,315 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:36:20,318 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:36:20,328 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:36:20,329 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:36:20,330 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:36:20,330 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 22:36:20,366 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:36:20,366 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:36:20,367 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:36:20,367 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:36:20,368 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:36:20,368 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:36:20,368 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:36:20,368 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:36:20,368 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:36:20,370 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:36:20,370 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:36:20,370 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:36:20,370 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:36:20,371 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:36:20,371 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:36:20,371 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:36:20,371 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:36:20,372 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:36:20,372 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:36:20,372 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:36:20,372 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:36:20,372 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:36:20,373 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:36:20,373 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:36:20,373 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:36:20,373 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:36:20,373 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:36:20,374 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:36:20,374 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 22:36:20,645 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:36:20,663 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:36:20,667 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:36:20,669 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:36:20,670 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:36:20,670 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label47.c [2019-11-06 22:36:20,739 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f256b08ee/b70bc089f6e5412a8a9cb5cd414ebbd2/FLAGec25fa702 [2019-11-06 22:36:21,215 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:36:21,216 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label47.c [2019-11-06 22:36:21,235 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f256b08ee/b70bc089f6e5412a8a9cb5cd414ebbd2/FLAGec25fa702 [2019-11-06 22:36:21,502 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f256b08ee/b70bc089f6e5412a8a9cb5cd414ebbd2 [2019-11-06 22:36:21,510 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:36:21,512 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:36:21,512 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:36:21,513 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:36:21,521 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:36:21,522 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:36:21" (1/1) ... [2019-11-06 22:36:21,524 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f087c8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:21, skipping insertion in model container [2019-11-06 22:36:21,525 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:36:21" (1/1) ... [2019-11-06 22:36:21,532 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:36:21,605 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:36:22,128 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:36:22,134 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:36:22,230 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:36:22,250 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:36:22,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:22 WrapperNode [2019-11-06 22:36:22,251 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:36:22,251 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:36:22,252 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:36:22,252 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:36:22,265 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:22" (1/1) ... [2019-11-06 22:36:22,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:22" (1/1) ... [2019-11-06 22:36:22,282 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:22" (1/1) ... [2019-11-06 22:36:22,283 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:22" (1/1) ... [2019-11-06 22:36:22,322 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:22" (1/1) ... [2019-11-06 22:36:22,341 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:22" (1/1) ... [2019-11-06 22:36:22,350 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:22" (1/1) ... [2019-11-06 22:36:22,367 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:36:22,367 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:36:22,368 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:36:22,368 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:36:22,368 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:22" (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 22:36:22,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:36:22,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:36:22,438 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:36:22,439 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:36:22,439 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:36:22,439 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:36:22,439 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:36:22,439 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:36:22,440 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:36:22,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:36:22,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:36:23,707 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:36:23,708 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:36:23,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:36:23 BoogieIcfgContainer [2019-11-06 22:36:23,712 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:36:23,713 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:36:23,713 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:36:23,718 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:36:23,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:36:21" (1/3) ... [2019-11-06 22:36:23,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aec5403 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:36:23, skipping insertion in model container [2019-11-06 22:36:23,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:22" (2/3) ... [2019-11-06 22:36:23,720 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aec5403 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:36:23, skipping insertion in model container [2019-11-06 22:36:23,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:36:23" (3/3) ... [2019-11-06 22:36:23,729 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label47.c [2019-11-06 22:36:23,740 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:36:23,749 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:36:23,761 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:36:23,796 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:36:23,796 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:36:23,798 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:36:23,798 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:36:23,798 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:36:23,798 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:36:23,799 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:36:23,799 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:36:23,832 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states. [2019-11-06 22:36:23,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-11-06 22:36:23,853 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:36:23,854 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:36:23,856 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:36:23,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:36:23,863 INFO L82 PathProgramCache]: Analyzing trace with hash -681714095, now seen corresponding path program 1 times [2019-11-06 22:36:23,872 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:36:23,873 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292368091] [2019-11-06 22:36:23,873 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:36:24,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:36:24,347 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 22:36:24,348 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292368091] [2019-11-06 22:36:24,350 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:36:24,350 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:36:24,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623762507] [2019-11-06 22:36:24,361 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:36:24,363 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:36:24,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:36:24,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:36:24,386 INFO L87 Difference]: Start difference. First operand 236 states. Second operand 3 states. [2019-11-06 22:36:25,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:36:25,293 INFO L93 Difference]: Finished difference Result 624 states and 1069 transitions. [2019-11-06 22:36:25,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:36:25,295 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2019-11-06 22:36:25,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:36:25,311 INFO L225 Difference]: With dead ends: 624 [2019-11-06 22:36:25,311 INFO L226 Difference]: Without dead ends: 326 [2019-11-06 22:36:25,317 INFO L630 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 [2019-11-06 22:36:25,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2019-11-06 22:36:25,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 321. [2019-11-06 22:36:25,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2019-11-06 22:36:25,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 467 transitions. [2019-11-06 22:36:25,434 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 467 transitions. Word has length 113 [2019-11-06 22:36:25,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:36:25,435 INFO L462 AbstractCegarLoop]: Abstraction has 321 states and 467 transitions. [2019-11-06 22:36:25,436 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:36:25,436 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 467 transitions. [2019-11-06 22:36:25,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-11-06 22:36:25,451 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:36:25,452 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:36:25,452 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:36:25,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:36:25,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1310105962, now seen corresponding path program 1 times [2019-11-06 22:36:25,454 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:36:25,454 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242522141] [2019-11-06 22:36:25,455 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:36:25,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:36:25,789 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:36:25,789 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242522141] [2019-11-06 22:36:25,790 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:36:25,790 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:36:25,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629562446] [2019-11-06 22:36:25,792 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:36:25,792 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:36:25,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:36:25,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:36:25,793 INFO L87 Difference]: Start difference. First operand 321 states and 467 transitions. Second operand 5 states. [2019-11-06 22:36:26,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:36:26,414 INFO L93 Difference]: Finished difference Result 723 states and 1093 transitions. [2019-11-06 22:36:26,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:36:26,417 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 121 [2019-11-06 22:36:26,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:36:26,421 INFO L225 Difference]: With dead ends: 723 [2019-11-06 22:36:26,421 INFO L226 Difference]: Without dead ends: 321 [2019-11-06 22:36:26,423 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:36:26,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2019-11-06 22:36:26,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 321. [2019-11-06 22:36:26,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2019-11-06 22:36:26,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 463 transitions. [2019-11-06 22:36:26,443 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 463 transitions. Word has length 121 [2019-11-06 22:36:26,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:36:26,444 INFO L462 AbstractCegarLoop]: Abstraction has 321 states and 463 transitions. [2019-11-06 22:36:26,444 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:36:26,444 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 463 transitions. [2019-11-06 22:36:26,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-06 22:36:26,446 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:36:26,446 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 22:36:26,446 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:36:26,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:36:26,447 INFO L82 PathProgramCache]: Analyzing trace with hash -2076461862, now seen corresponding path program 1 times [2019-11-06 22:36:26,447 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:36:26,447 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445722668] [2019-11-06 22:36:26,447 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:36:26,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:36:26,603 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:36:26,603 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445722668] [2019-11-06 22:36:26,604 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:36:26,604 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:36:26,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951046430] [2019-11-06 22:36:26,608 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:36:26,608 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:36:26,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:36:26,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:36:26,609 INFO L87 Difference]: Start difference. First operand 321 states and 463 transitions. Second operand 6 states. [2019-11-06 22:36:27,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:36:27,486 INFO L93 Difference]: Finished difference Result 979 states and 1481 transitions. [2019-11-06 22:36:27,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 22:36:27,487 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 123 [2019-11-06 22:36:27,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:36:27,494 INFO L225 Difference]: With dead ends: 979 [2019-11-06 22:36:27,495 INFO L226 Difference]: Without dead ends: 664 [2019-11-06 22:36:27,496 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 22:36:27,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2019-11-06 22:36:27,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 632. [2019-11-06 22:36:27,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 632 states. [2019-11-06 22:36:27,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 894 transitions. [2019-11-06 22:36:27,544 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 894 transitions. Word has length 123 [2019-11-06 22:36:27,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:36:27,545 INFO L462 AbstractCegarLoop]: Abstraction has 632 states and 894 transitions. [2019-11-06 22:36:27,545 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:36:27,545 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 894 transitions. [2019-11-06 22:36:27,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-11-06 22:36:27,549 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:36:27,549 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:36:27,550 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:36:27,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:36:27,550 INFO L82 PathProgramCache]: Analyzing trace with hash 313178237, now seen corresponding path program 1 times [2019-11-06 22:36:27,551 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:36:27,551 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766110734] [2019-11-06 22:36:27,551 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:36:27,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:36:27,764 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:36:27,765 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766110734] [2019-11-06 22:36:27,765 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:36:27,765 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:36:27,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865235640] [2019-11-06 22:36:27,766 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:36:27,766 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:36:27,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:36:27,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:36:27,767 INFO L87 Difference]: Start difference. First operand 632 states and 894 transitions. Second operand 5 states. [2019-11-06 22:36:28,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:36:28,391 INFO L93 Difference]: Finished difference Result 1342 states and 1951 transitions. [2019-11-06 22:36:28,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:36:28,394 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 137 [2019-11-06 22:36:28,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:36:28,401 INFO L225 Difference]: With dead ends: 1342 [2019-11-06 22:36:28,401 INFO L226 Difference]: Without dead ends: 632 [2019-11-06 22:36:28,403 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:36:28,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2019-11-06 22:36:28,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 632. [2019-11-06 22:36:28,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 632 states. [2019-11-06 22:36:28,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 882 transitions. [2019-11-06 22:36:28,422 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 882 transitions. Word has length 137 [2019-11-06 22:36:28,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:36:28,423 INFO L462 AbstractCegarLoop]: Abstraction has 632 states and 882 transitions. [2019-11-06 22:36:28,423 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:36:28,423 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 882 transitions. [2019-11-06 22:36:28,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-11-06 22:36:28,425 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:36:28,426 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:36:28,426 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:36:28,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:36:28,426 INFO L82 PathProgramCache]: Analyzing trace with hash 206908097, now seen corresponding path program 1 times [2019-11-06 22:36:28,427 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:36:28,427 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144528355] [2019-11-06 22:36:28,427 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:36:28,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:36:28,598 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:36:28,599 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144528355] [2019-11-06 22:36:28,599 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:36:28,599 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:36:28,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942116949] [2019-11-06 22:36:28,600 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:36:28,600 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:36:28,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:36:28,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:36:28,600 INFO L87 Difference]: Start difference. First operand 632 states and 882 transitions. Second operand 5 states. [2019-11-06 22:36:29,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:36:29,254 INFO L93 Difference]: Finished difference Result 1344 states and 1924 transitions. [2019-11-06 22:36:29,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:36:29,255 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 139 [2019-11-06 22:36:29,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:36:29,259 INFO L225 Difference]: With dead ends: 1344 [2019-11-06 22:36:29,259 INFO L226 Difference]: Without dead ends: 632 [2019-11-06 22:36:29,261 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:36:29,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2019-11-06 22:36:29,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 630. [2019-11-06 22:36:29,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 630 states. [2019-11-06 22:36:29,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 861 transitions. [2019-11-06 22:36:29,282 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 861 transitions. Word has length 139 [2019-11-06 22:36:29,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:36:29,282 INFO L462 AbstractCegarLoop]: Abstraction has 630 states and 861 transitions. [2019-11-06 22:36:29,282 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:36:29,283 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 861 transitions. [2019-11-06 22:36:29,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-11-06 22:36:29,286 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:36:29,286 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-11-06 22:36:29,287 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:36:29,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:36:29,287 INFO L82 PathProgramCache]: Analyzing trace with hash -441378269, now seen corresponding path program 1 times [2019-11-06 22:36:29,288 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:36:29,288 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381256156] [2019-11-06 22:36:29,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:36:29,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:36:29,382 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:36:29,383 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381256156] [2019-11-06 22:36:29,383 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342908230] [2019-11-06 22:36:29,383 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 22:36:29,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:36:29,483 INFO L256 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:36:29,497 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:36:29,595 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:36:29,595 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:36:29,714 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:36:29,715 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [692945035] [2019-11-06 22:36:29,721 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 147 [2019-11-06 22:36:29,794 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:36:29,795 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)