/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/Problem11_label21.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:46:10,573 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:46:10,575 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:46:10,588 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:46:10,597 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:46:10,599 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:46:10,599 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:46:10,601 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:46:10,602 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:46:10,603 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:46:10,605 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:46:10,607 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:46:10,609 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:46:10,610 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:46:10,611 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:46:10,612 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:46:10,615 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:46:10,625 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:46:10,626 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:46:10,627 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:46:10,631 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 22:46:10,647 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:46:10,647 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:46:10,648 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:46:10,649 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:46:10,649 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:46:10,649 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:46:10,649 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:46:10,650 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:46:10,650 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:46:10,650 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:46:10,650 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:46:10,650 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:46:10,650 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:46:10,651 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:46:10,651 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:46:10,651 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:46:10,651 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:46:10,652 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:46:10,652 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:46:10,652 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:46:10,652 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:46:10,652 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:46:10,652 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:46:10,653 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:46:10,653 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:46:10,653 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:46:10,653 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:46:10,653 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:46:10,654 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 22:46:10,924 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:46:10,940 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:46:10,945 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:46:10,946 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:46:10,947 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:46:10,947 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label21.c [2019-11-06 22:46:11,020 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac9814482/5e4fcb3ab56649e8a1d6ef95ea8e4f12/FLAG48166ecee [2019-11-06 22:46:11,652 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:46:11,654 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label21.c [2019-11-06 22:46:11,668 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac9814482/5e4fcb3ab56649e8a1d6ef95ea8e4f12/FLAG48166ecee [2019-11-06 22:46:11,920 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac9814482/5e4fcb3ab56649e8a1d6ef95ea8e4f12 [2019-11-06 22:46:11,929 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:46:11,931 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:46:11,932 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:46:11,932 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:46:11,936 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:46:11,937 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:46:11" (1/1) ... [2019-11-06 22:46:11,940 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72e5aa86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:11, skipping insertion in model container [2019-11-06 22:46:11,940 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:46:11" (1/1) ... [2019-11-06 22:46:11,948 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:46:12,016 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:46:12,860 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:46:12,869 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:46:13,071 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:46:13,088 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:46:13,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:13 WrapperNode [2019-11-06 22:46:13,089 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:46:13,089 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:46:13,090 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:46:13,090 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:46:13,104 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:13" (1/1) ... [2019-11-06 22:46:13,105 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:13" (1/1) ... [2019-11-06 22:46:13,132 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:13" (1/1) ... [2019-11-06 22:46:13,133 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:13" (1/1) ... [2019-11-06 22:46:13,214 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:13" (1/1) ... [2019-11-06 22:46:13,254 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:13" (1/1) ... [2019-11-06 22:46:13,270 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:13" (1/1) ... [2019-11-06 22:46:13,298 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:46:13,298 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:46:13,299 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:46:13,299 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:46:13,300 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:13" (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 22:46:13,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:46:13,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:46:13,371 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:46:13,371 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:46:13,371 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:46:13,372 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:46:13,372 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:46:13,372 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:46:13,372 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:46:13,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:46:13,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:46:15,152 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:46:15,152 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:46:15,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:46:15 BoogieIcfgContainer [2019-11-06 22:46:15,154 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:46:15,156 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:46:15,156 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:46:15,159 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:46:15,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:46:11" (1/3) ... [2019-11-06 22:46:15,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b9d5c96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:46:15, skipping insertion in model container [2019-11-06 22:46:15,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:13" (2/3) ... [2019-11-06 22:46:15,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b9d5c96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:46:15, skipping insertion in model container [2019-11-06 22:46:15,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:46:15" (3/3) ... [2019-11-06 22:46:15,164 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label21.c [2019-11-06 22:46:15,174 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:46:15,183 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:46:15,195 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:46:15,224 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:46:15,224 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:46:15,224 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:46:15,224 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:46:15,225 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:46:15,225 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:46:15,225 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:46:15,225 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:46:15,274 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-11-06 22:46:15,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-06 22:46:15,281 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:46:15,283 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] [2019-11-06 22:46:15,284 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:46:15,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:46:15,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1029260131, now seen corresponding path program 1 times [2019-11-06 22:46:15,301 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:46:15,301 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081541638] [2019-11-06 22:46:15,302 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:46:15,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:46:15,599 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 22:46:15,600 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081541638] [2019-11-06 22:46:15,601 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:46:15,601 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:46:15,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853961481] [2019-11-06 22:46:15,608 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:46:15,610 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:46:15,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:46:15,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:46:15,627 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 4 states. [2019-11-06 22:46:17,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:46:17,689 INFO L93 Difference]: Finished difference Result 978 states and 1754 transitions. [2019-11-06 22:46:17,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:46:17,694 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2019-11-06 22:46:17,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:46:17,716 INFO L225 Difference]: With dead ends: 978 [2019-11-06 22:46:17,716 INFO L226 Difference]: Without dead ends: 619 [2019-11-06 22:46:17,727 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 22:46:17,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2019-11-06 22:46:17,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 619. [2019-11-06 22:46:17,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 619 states. [2019-11-06 22:46:17,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 859 transitions. [2019-11-06 22:46:17,830 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 859 transitions. Word has length 30 [2019-11-06 22:46:17,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:46:17,831 INFO L462 AbstractCegarLoop]: Abstraction has 619 states and 859 transitions. [2019-11-06 22:46:17,831 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:46:17,831 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 859 transitions. [2019-11-06 22:46:17,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-11-06 22:46:17,837 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:46:17,837 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] [2019-11-06 22:46:17,838 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:46:17,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:46:17,838 INFO L82 PathProgramCache]: Analyzing trace with hash -27309419, now seen corresponding path program 1 times [2019-11-06 22:46:17,839 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:46:17,839 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138684202] [2019-11-06 22:46:17,839 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:46:17,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:46:18,023 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 22:46:18,024 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138684202] [2019-11-06 22:46:18,024 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:46:18,025 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:46:18,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480346416] [2019-11-06 22:46:18,027 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:46:18,027 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:46:18,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:46:18,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:46:18,028 INFO L87 Difference]: Start difference. First operand 619 states and 859 transitions. Second operand 4 states. [2019-11-06 22:46:19,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:46:19,964 INFO L93 Difference]: Finished difference Result 2380 states and 3384 transitions. [2019-11-06 22:46:19,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:46:19,965 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 103 [2019-11-06 22:46:19,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:46:19,977 INFO L225 Difference]: With dead ends: 2380 [2019-11-06 22:46:19,977 INFO L226 Difference]: Without dead ends: 1767 [2019-11-06 22:46:19,980 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 22:46:19,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2019-11-06 22:46:20,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 1563. [2019-11-06 22:46:20,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1563 states. [2019-11-06 22:46:20,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1563 states to 1563 states and 2115 transitions. [2019-11-06 22:46:20,051 INFO L78 Accepts]: Start accepts. Automaton has 1563 states and 2115 transitions. Word has length 103 [2019-11-06 22:46:20,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:46:20,052 INFO L462 AbstractCegarLoop]: Abstraction has 1563 states and 2115 transitions. [2019-11-06 22:46:20,052 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:46:20,052 INFO L276 IsEmpty]: Start isEmpty. Operand 1563 states and 2115 transitions. [2019-11-06 22:46:20,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-11-06 22:46:20,057 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:46:20,057 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] [2019-11-06 22:46:20,057 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:46:20,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:46:20,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1916245598, now seen corresponding path program 1 times [2019-11-06 22:46:20,058 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:46:20,058 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470960047] [2019-11-06 22:46:20,058 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:46:20,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:46:20,253 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 22:46:20,253 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470960047] [2019-11-06 22:46:20,254 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:46:20,254 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:46:20,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870893128] [2019-11-06 22:46:20,257 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:46:20,257 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:46:20,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:46:20,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:46:20,258 INFO L87 Difference]: Start difference. First operand 1563 states and 2115 transitions. Second operand 4 states. [2019-11-06 22:46:22,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:46:22,021 INFO L93 Difference]: Finished difference Result 5756 states and 8079 transitions. [2019-11-06 22:46:22,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:46:22,022 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 104 [2019-11-06 22:46:22,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:46:22,050 INFO L225 Difference]: With dead ends: 5756 [2019-11-06 22:46:22,051 INFO L226 Difference]: Without dead ends: 4199 [2019-11-06 22:46:22,060 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 22:46:22,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4199 states. [2019-11-06 22:46:22,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4199 to 4197. [2019-11-06 22:46:22,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4197 states. [2019-11-06 22:46:22,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4197 states to 4197 states and 5525 transitions. [2019-11-06 22:46:22,199 INFO L78 Accepts]: Start accepts. Automaton has 4197 states and 5525 transitions. Word has length 104 [2019-11-06 22:46:22,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:46:22,208 INFO L462 AbstractCegarLoop]: Abstraction has 4197 states and 5525 transitions. [2019-11-06 22:46:22,209 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:46:22,209 INFO L276 IsEmpty]: Start isEmpty. Operand 4197 states and 5525 transitions. [2019-11-06 22:46:22,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2019-11-06 22:46:22,226 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:46:22,227 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 22:46:22,227 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:46:22,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:46:22,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1953610746, now seen corresponding path program 1 times [2019-11-06 22:46:22,228 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:46:22,228 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080146918] [2019-11-06 22:46:22,228 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:46:22,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:46:22,478 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 46 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:46:22,479 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080146918] [2019-11-06 22:46:22,479 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916185459] [2019-11-06 22:46:22,479 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 22:46:22,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:46:22,589 INFO L256 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:46:22,619 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:46:22,759 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-06 22:46:22,759 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:46:22,904 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 46 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:46:22,904 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:46:22,904 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2019-11-06 22:46:22,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627613656] [2019-11-06 22:46:22,905 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:46:22,906 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:46:22,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:46:22,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:46:22,906 INFO L87 Difference]: Start difference. First operand 4197 states and 5525 transitions. Second operand 5 states. [2019-11-06 22:46:24,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:46:24,793 INFO L93 Difference]: Finished difference Result 9620 states and 13107 transitions. [2019-11-06 22:46:24,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:46:24,794 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 201 [2019-11-06 22:46:24,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:46:24,818 INFO L225 Difference]: With dead ends: 9620 [2019-11-06 22:46:24,819 INFO L226 Difference]: Without dead ends: 5429 [2019-11-06 22:46:24,830 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 400 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:46:24,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5429 states. [2019-11-06 22:46:24,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5429 to 5230. [2019-11-06 22:46:24,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5230 states. [2019-11-06 22:46:24,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5230 states to 5230 states and 6975 transitions. [2019-11-06 22:46:24,979 INFO L78 Accepts]: Start accepts. Automaton has 5230 states and 6975 transitions. Word has length 201 [2019-11-06 22:46:24,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:46:24,979 INFO L462 AbstractCegarLoop]: Abstraction has 5230 states and 6975 transitions. [2019-11-06 22:46:24,979 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:46:24,979 INFO L276 IsEmpty]: Start isEmpty. Operand 5230 states and 6975 transitions. [2019-11-06 22:46:24,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2019-11-06 22:46:24,985 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:46:24,986 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 22:46:25,189 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:46:25,190 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:46:25,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:46:25,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1376578934, now seen corresponding path program 1 times [2019-11-06 22:46:25,191 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:46:25,191 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151021364] [2019-11-06 22:46:25,192 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:46:25,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:46:25,510 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 129 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:46:25,512 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151021364] [2019-11-06 22:46:25,513 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452778259] [2019-11-06 22:46:25,513 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:46:25,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:46:25,629 INFO L256 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:46:25,653 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:46:25,733 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2019-11-06 22:46:25,733 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:46:25,815 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2019-11-06 22:46:25,815 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:46:25,815 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2019-11-06 22:46:25,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258981559] [2019-11-06 22:46:25,817 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:46:25,818 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:46:25,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:46:25,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:46:25,819 INFO L87 Difference]: Start difference. First operand 5230 states and 6975 transitions. Second operand 3 states. [2019-11-06 22:46:27,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:46:27,101 INFO L93 Difference]: Finished difference Result 11973 states and 16364 transitions. [2019-11-06 22:46:27,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:46:27,101 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 209 [2019-11-06 22:46:27,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:46:27,132 INFO L225 Difference]: With dead ends: 11973 [2019-11-06 22:46:27,132 INFO L226 Difference]: Without dead ends: 6749 [2019-11-06 22:46:27,145 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 417 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:46:27,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6749 states. [2019-11-06 22:46:27,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6749 to 6749. [2019-11-06 22:46:27,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6749 states. [2019-11-06 22:46:27,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6749 states to 6749 states and 8974 transitions. [2019-11-06 22:46:27,303 INFO L78 Accepts]: Start accepts. Automaton has 6749 states and 8974 transitions. Word has length 209 [2019-11-06 22:46:27,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:46:27,304 INFO L462 AbstractCegarLoop]: Abstraction has 6749 states and 8974 transitions. [2019-11-06 22:46:27,304 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:46:27,304 INFO L276 IsEmpty]: Start isEmpty. Operand 6749 states and 8974 transitions. [2019-11-06 22:46:27,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2019-11-06 22:46:27,318 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:46:27,318 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 22:46:27,526 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:46:27,527 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:46:27,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:46:27,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1652933715, now seen corresponding path program 1 times [2019-11-06 22:46:27,528 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:46:27,528 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355104578] [2019-11-06 22:46:27,529 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:46:27,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:46:27,862 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 138 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:46:27,862 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355104578] [2019-11-06 22:46:27,862 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217709020] [2019-11-06 22:46:27,864 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:46:27,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:46:27,982 INFO L256 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 22:46:27,990 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:46:28,111 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-06 22:46:28,112 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:46:28,213 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-06 22:46:28,213 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:46:28,214 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6] total 10 [2019-11-06 22:46:28,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614826633] [2019-11-06 22:46:28,215 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:46:28,215 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:46:28,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:46:28,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:46:28,216 INFO L87 Difference]: Start difference. First operand 6749 states and 8974 transitions. Second operand 6 states.