java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem12_label05_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 16:09:58,794 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 16:09:58,796 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 16:09:58,811 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 16:09:58,811 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 16:09:58,812 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 16:09:58,814 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 16:09:58,815 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 16:09:58,818 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 16:09:58,824 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 16:09:58,825 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 16:09:58,825 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 16:09:58,826 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 16:09:58,830 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 16:09:58,831 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 16:09:58,832 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 16:09:58,835 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 16:09:58,837 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 16:09:58,842 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 16:09:58,843 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 16:09:58,844 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 16:09:58,846 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 16:09:58,848 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 16:09:58,860 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-24 16:09:58,890 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 16:09:58,890 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 16:09:58,891 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 16:09:58,891 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 16:09:58,892 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 16:09:58,892 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 16:09:58,892 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 16:09:58,892 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 16:09:58,893 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 16:09:58,893 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 16:09:58,893 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 16:09:58,893 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 16:09:58,893 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 16:09:58,894 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 16:09:58,894 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 16:09:58,894 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 16:09:58,894 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 16:09:58,894 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 16:09:58,895 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 16:09:58,895 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 16:09:58,895 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 16:09:58,895 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 16:09:58,895 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 16:09:58,896 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 16:09:58,896 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 16:09:58,896 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 16:09:58,896 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 16:09:58,897 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 16:09:58,968 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 16:09:58,985 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 16:09:58,989 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 16:09:58,991 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 16:09:58,991 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 16:09:58,992 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label05_true-unreach-call.c [2018-10-24 16:09:59,061 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/5ebd13a75/8d1d80c9cc4d4cd187c136b4467a2554/FLAG712b06742 [2018-10-24 16:09:59,862 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 16:09:59,863 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label05_true-unreach-call.c [2018-10-24 16:09:59,894 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/5ebd13a75/8d1d80c9cc4d4cd187c136b4467a2554/FLAG712b06742 [2018-10-24 16:09:59,912 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/5ebd13a75/8d1d80c9cc4d4cd187c136b4467a2554 [2018-10-24 16:09:59,924 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 16:09:59,926 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 16:09:59,927 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 16:09:59,927 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 16:09:59,931 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 16:09:59,932 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:09:59" (1/1) ... [2018-10-24 16:09:59,935 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a37ae9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:09:59, skipping insertion in model container [2018-10-24 16:09:59,936 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:09:59" (1/1) ... [2018-10-24 16:09:59,946 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 16:10:00,113 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 16:10:01,445 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 16:10:01,456 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 16:10:02,025 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 16:10:02,062 INFO L193 MainTranslator]: Completed translation [2018-10-24 16:10:02,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:10:02 WrapperNode [2018-10-24 16:10:02,063 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 16:10:02,065 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 16:10:02,065 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 16:10:02,065 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 16:10:02,076 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:10:02" (1/1) ... [2018-10-24 16:10:02,148 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:10:02" (1/1) ... [2018-10-24 16:10:02,738 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 16:10:02,739 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 16:10:02,739 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 16:10:02,739 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 16:10:02,751 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:10:02" (1/1) ... [2018-10-24 16:10:02,751 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:10:02" (1/1) ... [2018-10-24 16:10:02,791 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:10:02" (1/1) ... [2018-10-24 16:10:02,792 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:10:02" (1/1) ... [2018-10-24 16:10:02,937 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:10:02" (1/1) ... [2018-10-24 16:10:02,968 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:10:02" (1/1) ... [2018-10-24 16:10:03,037 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:10:02" (1/1) ... [2018-10-24 16:10:03,084 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 16:10:03,084 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 16:10:03,084 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 16:10:03,085 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 16:10:03,086 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:10:02" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-24 16:10:03,153 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-24 16:10:03,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 16:10:03,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 16:10:12,114 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 16:10:12,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:10:12 BoogieIcfgContainer [2018-10-24 16:10:12,115 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 16:10:12,116 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 16:10:12,116 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 16:10:12,119 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 16:10:12,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 04:09:59" (1/3) ... [2018-10-24 16:10:12,120 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28d0ef2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:10:12, skipping insertion in model container [2018-10-24 16:10:12,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:10:02" (2/3) ... [2018-10-24 16:10:12,121 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28d0ef2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:10:12, skipping insertion in model container [2018-10-24 16:10:12,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:10:12" (3/3) ... [2018-10-24 16:10:12,123 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label05_true-unreach-call.c [2018-10-24 16:10:12,133 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 16:10:12,142 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 16:10:12,160 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 16:10:12,202 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 16:10:12,203 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 16:10:12,203 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 16:10:12,203 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 16:10:12,204 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 16:10:12,204 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 16:10:12,204 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 16:10:12,204 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 16:10:12,204 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 16:10:12,238 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states. [2018-10-24 16:10:12,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-24 16:10:12,248 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:10:12,249 INFO L375 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] [2018-10-24 16:10:12,252 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:10:12,258 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:10:12,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1074201598, now seen corresponding path program 1 times [2018-10-24 16:10:12,260 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:10:12,261 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:10:12,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:10:12,312 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:10:12,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:10:12,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:10:12,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:10:12,695 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:10:12,695 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:10:12,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:10:12,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:10:12,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:10:12,719 INFO L87 Difference]: Start difference. First operand 819 states. Second operand 4 states. [2018-10-24 16:10:28,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:10:28,203 INFO L93 Difference]: Finished difference Result 3146 states and 6134 transitions. [2018-10-24 16:10:28,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:10:28,205 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2018-10-24 16:10:28,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:10:28,246 INFO L225 Difference]: With dead ends: 3146 [2018-10-24 16:10:28,247 INFO L226 Difference]: Without dead ends: 2320 [2018-10-24 16:10:28,254 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:10:28,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2018-10-24 16:10:28,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 2320. [2018-10-24 16:10:28,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2320 states. [2018-10-24 16:10:28,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2320 states to 2320 states and 3858 transitions. [2018-10-24 16:10:28,422 INFO L78 Accepts]: Start accepts. Automaton has 2320 states and 3858 transitions. Word has length 60 [2018-10-24 16:10:28,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:10:28,422 INFO L481 AbstractCegarLoop]: Abstraction has 2320 states and 3858 transitions. [2018-10-24 16:10:28,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:10:28,423 INFO L276 IsEmpty]: Start isEmpty. Operand 2320 states and 3858 transitions. [2018-10-24 16:10:28,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-24 16:10:28,429 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:10:28,430 INFO L375 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:10:28,430 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:10:28,430 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:10:28,431 INFO L82 PathProgramCache]: Analyzing trace with hash -739096271, now seen corresponding path program 1 times [2018-10-24 16:10:28,432 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:10:28,432 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:10:28,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:10:28,434 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:10:28,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:10:28,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:10:29,277 WARN L179 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2018-10-24 16:10:29,371 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 52 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:10:29,371 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:10:29,371 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:10:29,389 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:10:29,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:10:29,462 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:10:29,622 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:10:29,656 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:10:29,656 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2018-10-24 16:10:29,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 16:10:29,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 16:10:29,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-10-24 16:10:29,659 INFO L87 Difference]: Start difference. First operand 2320 states and 3858 transitions. Second operand 7 states. [2018-10-24 16:10:31,206 WARN L179 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2018-10-24 16:10:56,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:10:56,302 INFO L93 Difference]: Finished difference Result 15950 states and 27417 transitions. [2018-10-24 16:10:56,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-24 16:10:56,303 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 132 [2018-10-24 16:10:56,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:10:56,354 INFO L225 Difference]: With dead ends: 15950 [2018-10-24 16:10:56,355 INFO L226 Difference]: Without dead ends: 11373 [2018-10-24 16:10:56,363 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 133 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2018-10-24 16:10:56,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11373 states. [2018-10-24 16:10:56,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11373 to 6831. [2018-10-24 16:10:56,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6831 states. [2018-10-24 16:10:56,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6831 states to 6831 states and 8672 transitions. [2018-10-24 16:10:56,532 INFO L78 Accepts]: Start accepts. Automaton has 6831 states and 8672 transitions. Word has length 132 [2018-10-24 16:10:56,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:10:56,532 INFO L481 AbstractCegarLoop]: Abstraction has 6831 states and 8672 transitions. [2018-10-24 16:10:56,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 16:10:56,536 INFO L276 IsEmpty]: Start isEmpty. Operand 6831 states and 8672 transitions. [2018-10-24 16:10:56,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2018-10-24 16:10:56,548 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:10:56,549 INFO L375 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, 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] [2018-10-24 16:10:56,549 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:10:56,549 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:10:56,550 INFO L82 PathProgramCache]: Analyzing trace with hash 959738635, now seen corresponding path program 1 times [2018-10-24 16:10:56,550 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:10:56,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:10:56,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:10:56,553 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:10:56,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:10:56,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:10:57,138 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:10:57,139 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:10:57,139 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:10:57,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:10:57,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:10:57,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:10:57,141 INFO L87 Difference]: Start difference. First operand 6831 states and 8672 transitions. Second operand 4 states. [2018-10-24 16:11:06,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:11:06,352 INFO L93 Difference]: Finished difference Result 26444 states and 33663 transitions. [2018-10-24 16:11:06,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:11:06,355 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 275 [2018-10-24 16:11:06,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:11:06,429 INFO L225 Difference]: With dead ends: 26444 [2018-10-24 16:11:06,429 INFO L226 Difference]: Without dead ends: 19615 [2018-10-24 16:11:06,444 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:11:06,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19615 states. [2018-10-24 16:11:06,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19615 to 19615. [2018-10-24 16:11:06,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19615 states. [2018-10-24 16:11:06,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19615 states to 19615 states and 24199 transitions. [2018-10-24 16:11:06,762 INFO L78 Accepts]: Start accepts. Automaton has 19615 states and 24199 transitions. Word has length 275 [2018-10-24 16:11:06,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:11:06,763 INFO L481 AbstractCegarLoop]: Abstraction has 19615 states and 24199 transitions. [2018-10-24 16:11:06,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:11:06,763 INFO L276 IsEmpty]: Start isEmpty. Operand 19615 states and 24199 transitions. [2018-10-24 16:11:06,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2018-10-24 16:11:06,770 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:11:06,770 INFO L375 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, 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] [2018-10-24 16:11:06,771 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:11:06,771 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:11:06,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1039496053, now seen corresponding path program 1 times [2018-10-24 16:11:06,771 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:11:06,771 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:11:06,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:11:06,773 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:11:06,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:11:06,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:11:07,315 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2018-10-24 16:11:07,541 WARN L179 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 8 [2018-10-24 16:11:07,827 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2018-10-24 16:11:07,828 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:11:07,828 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 16:11:07,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 16:11:07,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 16:11:07,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-24 16:11:07,829 INFO L87 Difference]: Start difference. First operand 19615 states and 24199 transitions. Second operand 6 states. [2018-10-24 16:11:18,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:11:18,267 INFO L93 Difference]: Finished difference Result 57277 states and 70860 transitions. [2018-10-24 16:11:18,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 16:11:18,268 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 275 [2018-10-24 16:11:18,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:11:18,344 INFO L225 Difference]: With dead ends: 57277 [2018-10-24 16:11:18,345 INFO L226 Difference]: Without dead ends: 37664 [2018-10-24 16:11:18,372 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2018-10-24 16:11:18,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37664 states. [2018-10-24 16:11:19,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37664 to 37664. [2018-10-24 16:11:19,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37664 states. [2018-10-24 16:11:19,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37664 states to 37664 states and 44629 transitions. [2018-10-24 16:11:19,304 INFO L78 Accepts]: Start accepts. Automaton has 37664 states and 44629 transitions. Word has length 275 [2018-10-24 16:11:19,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:11:19,305 INFO L481 AbstractCegarLoop]: Abstraction has 37664 states and 44629 transitions. [2018-10-24 16:11:19,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 16:11:19,305 INFO L276 IsEmpty]: Start isEmpty. Operand 37664 states and 44629 transitions. [2018-10-24 16:11:19,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2018-10-24 16:11:19,314 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:11:19,314 INFO L375 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:11:19,314 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:11:19,315 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:11:19,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1631092900, now seen corresponding path program 1 times [2018-10-24 16:11:19,315 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:11:19,315 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:11:19,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:11:19,316 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:11:19,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:11:19,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:11:19,757 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 115 proven. 4 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2018-10-24 16:11:19,758 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:11:19,758 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:11:19,774 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:11:19,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:11:19,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:11:19,985 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 216 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:11:20,020 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:11:20,020 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2018-10-24 16:11:20,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:11:20,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:11:20,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:11:20,024 INFO L87 Difference]: Start difference. First operand 37664 states and 44629 transitions. Second operand 4 states. [2018-10-24 16:11:27,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:11:27,428 INFO L93 Difference]: Finished difference Result 113739 states and 137973 transitions. [2018-10-24 16:11:27,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:11:27,433 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 308 [2018-10-24 16:11:27,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:11:27,564 INFO L225 Difference]: With dead ends: 113739 [2018-10-24 16:11:27,565 INFO L226 Difference]: Without dead ends: 76077 [2018-10-24 16:11:27,615 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:11:27,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76077 states. [2018-10-24 16:11:28,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76077 to 50448. [2018-10-24 16:11:28,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50448 states. [2018-10-24 16:11:28,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50448 states to 50448 states and 59938 transitions. [2018-10-24 16:11:28,759 INFO L78 Accepts]: Start accepts. Automaton has 50448 states and 59938 transitions. Word has length 308 [2018-10-24 16:11:28,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:11:28,760 INFO L481 AbstractCegarLoop]: Abstraction has 50448 states and 59938 transitions. [2018-10-24 16:11:28,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:11:28,760 INFO L276 IsEmpty]: Start isEmpty. Operand 50448 states and 59938 transitions. [2018-10-24 16:11:28,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2018-10-24 16:11:28,775 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:11:28,776 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:11:28,776 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:11:28,776 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:11:28,777 INFO L82 PathProgramCache]: Analyzing trace with hash 444586520, now seen corresponding path program 1 times [2018-10-24 16:11:28,777 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:11:28,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:11:28,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:11:28,778 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:11:28,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:11:28,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:11:29,104 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 312 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-10-24 16:11:29,104 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:11:29,104 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:11:29,105 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 16:11:29,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 16:11:29,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:11:29,106 INFO L87 Difference]: Start difference. First operand 50448 states and 59938 transitions. Second operand 3 states. [2018-10-24 16:11:34,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:11:34,956 INFO L93 Difference]: Finished difference Result 111422 states and 133221 transitions. [2018-10-24 16:11:34,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 16:11:34,956 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 362 [2018-10-24 16:11:34,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:11:35,043 INFO L225 Difference]: With dead ends: 111422 [2018-10-24 16:11:35,043 INFO L226 Difference]: Without dead ends: 60976 [2018-10-24 16:11:35,088 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:11:35,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60976 states. [2018-10-24 16:11:35,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60976 to 58720. [2018-10-24 16:11:35,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58720 states. [2018-10-24 16:11:35,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58720 states to 58720 states and 68483 transitions. [2018-10-24 16:11:35,717 INFO L78 Accepts]: Start accepts. Automaton has 58720 states and 68483 transitions. Word has length 362 [2018-10-24 16:11:35,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:11:35,718 INFO L481 AbstractCegarLoop]: Abstraction has 58720 states and 68483 transitions. [2018-10-24 16:11:35,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 16:11:35,718 INFO L276 IsEmpty]: Start isEmpty. Operand 58720 states and 68483 transitions. [2018-10-24 16:11:35,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2018-10-24 16:11:35,733 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:11:35,734 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:11:35,734 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:11:35,735 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:11:35,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1785389000, now seen corresponding path program 1 times [2018-10-24 16:11:35,735 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:11:35,735 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:11:35,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:11:35,736 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:11:35,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:11:35,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:11:36,922 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 173 proven. 0 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2018-10-24 16:11:36,922 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:11:36,922 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:11:36,923 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:11:36,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:11:36,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:11:36,923 INFO L87 Difference]: Start difference. First operand 58720 states and 68483 transitions. Second operand 4 states. [2018-10-24 16:11:47,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:11:47,554 INFO L93 Difference]: Finished difference Result 119694 states and 139344 transitions. [2018-10-24 16:11:47,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:11:47,555 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 394 [2018-10-24 16:11:47,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:11:47,632 INFO L225 Difference]: With dead ends: 119694 [2018-10-24 16:11:47,632 INFO L226 Difference]: Without dead ends: 60976 [2018-10-24 16:11:47,672 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:11:47,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60976 states. [2018-10-24 16:11:48,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60976 to 60223. [2018-10-24 16:11:48,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60223 states. [2018-10-24 16:11:48,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60223 states to 60223 states and 68815 transitions. [2018-10-24 16:11:48,300 INFO L78 Accepts]: Start accepts. Automaton has 60223 states and 68815 transitions. Word has length 394 [2018-10-24 16:11:48,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:11:48,301 INFO L481 AbstractCegarLoop]: Abstraction has 60223 states and 68815 transitions. [2018-10-24 16:11:48,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:11:48,301 INFO L276 IsEmpty]: Start isEmpty. Operand 60223 states and 68815 transitions. [2018-10-24 16:11:48,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2018-10-24 16:11:48,315 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:11:48,316 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:11:48,316 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:11:48,316 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:11:48,317 INFO L82 PathProgramCache]: Analyzing trace with hash -484989361, now seen corresponding path program 1 times [2018-10-24 16:11:48,317 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:11:48,317 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:11:48,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:11:48,318 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:11:48,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:11:48,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:11:48,743 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 367 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-10-24 16:11:48,743 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:11:48,744 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:11:48,744 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 16:11:48,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 16:11:48,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:11:48,745 INFO L87 Difference]: Start difference. First operand 60223 states and 68815 transitions. Second operand 3 states. [2018-10-24 16:11:55,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:11:55,166 INFO L93 Difference]: Finished difference Result 136988 states and 158243 transitions. [2018-10-24 16:11:55,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 16:11:55,167 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 401 [2018-10-24 16:11:55,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:11:55,254 INFO L225 Difference]: With dead ends: 136988 [2018-10-24 16:11:55,254 INFO L226 Difference]: Without dead ends: 76767 [2018-10-24 16:11:55,300 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:11:55,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76767 states. [2018-10-24 16:11:55,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76767 to 76767. [2018-10-24 16:11:55,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76767 states. [2018-10-24 16:11:56,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76767 states to 76767 states and 88455 transitions. [2018-10-24 16:11:56,012 INFO L78 Accepts]: Start accepts. Automaton has 76767 states and 88455 transitions. Word has length 401 [2018-10-24 16:11:56,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:11:56,013 INFO L481 AbstractCegarLoop]: Abstraction has 76767 states and 88455 transitions. [2018-10-24 16:11:56,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 16:11:56,013 INFO L276 IsEmpty]: Start isEmpty. Operand 76767 states and 88455 transitions. [2018-10-24 16:11:56,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2018-10-24 16:11:56,028 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:11:56,028 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:11:56,028 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:11:56,028 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:11:56,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1560089356, now seen corresponding path program 1 times [2018-10-24 16:11:56,029 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:11:56,029 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:11:56,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:11:56,030 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:11:56,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:11:56,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:11:56,342 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 360 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-10-24 16:11:56,343 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:11:56,343 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:11:56,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:11:56,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:11:56,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:11:56,344 INFO L87 Difference]: Start difference. First operand 76767 states and 88455 transitions. Second operand 4 states. [2018-10-24 16:12:04,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:12:04,265 INFO L93 Difference]: Finished difference Result 210684 states and 243695 transitions. [2018-10-24 16:12:04,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:12:04,266 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 418 [2018-10-24 16:12:04,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:12:04,404 INFO L225 Difference]: With dead ends: 210684 [2018-10-24 16:12:04,404 INFO L226 Difference]: Without dead ends: 127893 [2018-10-24 16:12:04,446 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:12:04,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127893 states. [2018-10-24 16:12:05,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127893 to 125637. [2018-10-24 16:12:05,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125637 states. [2018-10-24 16:12:05,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125637 states to 125637 states and 138432 transitions. [2018-10-24 16:12:05,534 INFO L78 Accepts]: Start accepts. Automaton has 125637 states and 138432 transitions. Word has length 418 [2018-10-24 16:12:05,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:12:05,535 INFO L481 AbstractCegarLoop]: Abstraction has 125637 states and 138432 transitions. [2018-10-24 16:12:05,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:12:05,535 INFO L276 IsEmpty]: Start isEmpty. Operand 125637 states and 138432 transitions. [2018-10-24 16:12:05,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2018-10-24 16:12:05,546 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:12:05,547 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:12:05,547 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:12:05,547 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:12:05,547 INFO L82 PathProgramCache]: Analyzing trace with hash 2056982082, now seen corresponding path program 1 times [2018-10-24 16:12:05,547 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:12:05,548 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:12:05,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:12:05,549 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:12:05,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:12:05,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:12:06,016 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 310 proven. 58 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-10-24 16:12:06,016 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:12:06,016 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:12:06,024 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:12:06,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:12:06,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:12:06,334 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 310 proven. 58 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-10-24 16:12:06,354 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:12:06,355 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2018-10-24 16:12:06,355 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 16:12:06,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 16:12:06,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-24 16:12:06,356 INFO L87 Difference]: Start difference. First operand 125637 states and 138432 transitions. Second operand 6 states. [2018-10-24 16:12:28,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:12:28,202 INFO L93 Difference]: Finished difference Result 323472 states and 355373 transitions. [2018-10-24 16:12:28,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 16:12:28,203 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 422 [2018-10-24 16:12:28,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:12:28,396 INFO L225 Difference]: With dead ends: 323472 [2018-10-24 16:12:28,396 INFO L226 Difference]: Without dead ends: 196330 [2018-10-24 16:12:28,433 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 423 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-10-24 16:12:28,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196330 states. [2018-10-24 16:12:29,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196330 to 166243. [2018-10-24 16:12:29,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166243 states. [2018-10-24 16:12:29,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166243 states to 166243 states and 181013 transitions. [2018-10-24 16:12:29,873 INFO L78 Accepts]: Start accepts. Automaton has 166243 states and 181013 transitions. Word has length 422 [2018-10-24 16:12:29,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:12:29,874 INFO L481 AbstractCegarLoop]: Abstraction has 166243 states and 181013 transitions. [2018-10-24 16:12:29,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 16:12:29,874 INFO L276 IsEmpty]: Start isEmpty. Operand 166243 states and 181013 transitions. [2018-10-24 16:12:29,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2018-10-24 16:12:29,883 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:12:29,883 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:12:29,883 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:12:29,884 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:12:29,884 INFO L82 PathProgramCache]: Analyzing trace with hash -322583633, now seen corresponding path program 1 times [2018-10-24 16:12:29,884 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:12:29,884 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:12:29,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:12:29,885 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:12:29,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:12:29,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:12:30,696 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 311 proven. 143 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2018-10-24 16:12:30,696 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:12:30,697 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:12:30,703 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:12:30,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:12:30,814 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:12:32,230 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 399 proven. 55 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2018-10-24 16:12:32,252 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:12:32,252 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2018-10-24 16:12:32,253 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-24 16:12:32,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-24 16:12:32,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2018-10-24 16:12:32,253 INFO L87 Difference]: Start difference. First operand 166243 states and 181013 transitions. Second operand 10 states. [2018-10-24 16:12:57,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:12:57,720 INFO L93 Difference]: Finished difference Result 349780 states and 381190 transitions. [2018-10-24 16:12:57,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-24 16:12:57,720 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 449 [2018-10-24 16:12:57,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:12:57,928 INFO L225 Difference]: With dead ends: 349780 [2018-10-24 16:12:57,928 INFO L226 Difference]: Without dead ends: 176762 [2018-10-24 16:12:57,993 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 446 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2018-10-24 16:12:58,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176762 states. [2018-10-24 16:12:59,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176762 to 166986. [2018-10-24 16:12:59,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166986 states. [2018-10-24 16:13:00,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166986 states to 166986 states and 180669 transitions. [2018-10-24 16:13:00,780 INFO L78 Accepts]: Start accepts. Automaton has 166986 states and 180669 transitions. Word has length 449 [2018-10-24 16:13:00,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:13:00,780 INFO L481 AbstractCegarLoop]: Abstraction has 166986 states and 180669 transitions. [2018-10-24 16:13:00,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-24 16:13:00,780 INFO L276 IsEmpty]: Start isEmpty. Operand 166986 states and 180669 transitions. [2018-10-24 16:13:00,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2018-10-24 16:13:00,788 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:13:00,789 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 3, 3, 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] [2018-10-24 16:13:00,789 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:13:00,789 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:13:00,790 INFO L82 PathProgramCache]: Analyzing trace with hash -382110508, now seen corresponding path program 1 times [2018-10-24 16:13:00,790 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:13:00,790 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:13:00,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:13:00,794 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:13:00,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:13:00,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:13:01,184 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 429 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-10-24 16:13:01,185 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:13:01,185 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:13:01,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:13:01,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:13:01,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:13:01,186 INFO L87 Difference]: Start difference. First operand 166986 states and 180669 transitions. Second operand 4 states. [2018-10-24 16:13:10,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:13:10,683 INFO L93 Difference]: Finished difference Result 346002 states and 374537 transitions. [2018-10-24 16:13:10,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:13:10,683 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 463 [2018-10-24 16:13:10,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:13:10,901 INFO L225 Difference]: With dead ends: 346002 [2018-10-24 16:13:10,901 INFO L226 Difference]: Without dead ends: 179770 [2018-10-24 16:13:10,960 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:13:11,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179770 states. [2018-10-24 16:13:12,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179770 to 179770. [2018-10-24 16:13:12,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179770 states. [2018-10-24 16:13:12,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179770 states to 179770 states and 192043 transitions. [2018-10-24 16:13:12,485 INFO L78 Accepts]: Start accepts. Automaton has 179770 states and 192043 transitions. Word has length 463 [2018-10-24 16:13:12,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:13:12,486 INFO L481 AbstractCegarLoop]: Abstraction has 179770 states and 192043 transitions. [2018-10-24 16:13:12,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:13:12,486 INFO L276 IsEmpty]: Start isEmpty. Operand 179770 states and 192043 transitions. [2018-10-24 16:13:12,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2018-10-24 16:13:12,500 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:13:12,500 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:13:12,500 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:13:12,501 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:13:12,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1020320554, now seen corresponding path program 1 times [2018-10-24 16:13:12,501 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:13:12,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:13:12,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:13:12,502 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:13:12,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:13:12,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:13:13,730 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 496 proven. 0 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2018-10-24 16:13:13,730 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:13:13,730 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:13:13,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:13:13,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:13:13,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:13:13,731 INFO L87 Difference]: Start difference. First operand 179770 states and 192043 transitions. Second operand 4 states. [2018-10-24 16:13:21,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:13:21,321 INFO L93 Difference]: Finished difference Result 358786 states and 383327 transitions. [2018-10-24 16:13:21,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:13:21,322 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 492 [2018-10-24 16:13:21,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:13:21,534 INFO L225 Difference]: With dead ends: 358786 [2018-10-24 16:13:21,534 INFO L226 Difference]: Without dead ends: 179017 [2018-10-24 16:13:21,634 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:13:21,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179017 states. [2018-10-24 16:13:23,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179017 to 176761. [2018-10-24 16:13:23,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176761 states. [2018-10-24 16:13:24,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176761 states to 176761 states and 187136 transitions. [2018-10-24 16:13:24,035 INFO L78 Accepts]: Start accepts. Automaton has 176761 states and 187136 transitions. Word has length 492 [2018-10-24 16:13:24,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:13:24,035 INFO L481 AbstractCegarLoop]: Abstraction has 176761 states and 187136 transitions. [2018-10-24 16:13:24,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:13:24,036 INFO L276 IsEmpty]: Start isEmpty. Operand 176761 states and 187136 transitions. [2018-10-24 16:13:24,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2018-10-24 16:13:24,045 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:13:24,046 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:13:24,046 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:13:24,046 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:13:24,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1700244961, now seen corresponding path program 1 times [2018-10-24 16:13:24,047 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:13:24,047 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:13:24,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:13:24,048 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:13:24,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:13:24,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:13:24,539 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 173 proven. 0 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2018-10-24 16:13:24,540 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:13:24,540 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:13:24,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:13:24,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:13:24,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:13:24,541 INFO L87 Difference]: Start difference. First operand 176761 states and 187136 transitions. Second operand 5 states. [2018-10-24 16:13:40,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:13:40,033 INFO L93 Difference]: Finished difference Result 485132 states and 513325 transitions. [2018-10-24 16:13:40,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 16:13:40,034 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 497 [2018-10-24 16:13:40,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:13:40,348 INFO L225 Difference]: With dead ends: 485132 [2018-10-24 16:13:40,349 INFO L226 Difference]: Without dead ends: 309125 [2018-10-24 16:13:40,415 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:13:40,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309125 states. [2018-10-24 16:13:43,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309125 to 244451. [2018-10-24 16:13:43,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244451 states. [2018-10-24 16:13:43,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244451 states to 244451 states and 255830 transitions. [2018-10-24 16:13:43,571 INFO L78 Accepts]: Start accepts. Automaton has 244451 states and 255830 transitions. Word has length 497 [2018-10-24 16:13:43,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:13:43,572 INFO L481 AbstractCegarLoop]: Abstraction has 244451 states and 255830 transitions. [2018-10-24 16:13:43,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:13:43,572 INFO L276 IsEmpty]: Start isEmpty. Operand 244451 states and 255830 transitions. [2018-10-24 16:13:43,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 519 [2018-10-24 16:13:43,580 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:13:43,581 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:13:43,581 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:13:43,581 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:13:43,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1051512501, now seen corresponding path program 1 times [2018-10-24 16:13:43,581 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:13:43,582 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:13:43,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:13:43,582 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:13:43,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:13:43,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:13:43,893 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 231 proven. 0 refuted. 0 times theorem prover too weak. 567 trivial. 0 not checked. [2018-10-24 16:13:43,893 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:13:43,894 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:13:43,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:13:43,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:13:43,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:13:43,895 INFO L87 Difference]: Start difference. First operand 244451 states and 255830 transitions. Second operand 4 states. Received shutdown request... [2018-10-24 16:13:53,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:13:53,405 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 16:13:53,414 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 16:13:53,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 04:13:53 BoogieIcfgContainer [2018-10-24 16:13:53,415 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 16:13:53,417 INFO L168 Benchmark]: Toolchain (without parser) took 233491.38 ms. Allocated memory was 1.5 GB in the beginning and 4.8 GB in the end (delta: 3.3 GB). Free memory was 1.4 GB in the beginning and 3.7 GB in the end (delta: -2.3 GB). Peak memory consumption was 962.2 MB. Max. memory is 7.1 GB. [2018-10-24 16:13:53,418 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 16:13:53,420 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2136.76 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 200.8 MB). Peak memory consumption was 200.8 MB. Max. memory is 7.1 GB. [2018-10-24 16:13:53,420 INFO L168 Benchmark]: Boogie Procedure Inliner took 673.90 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 804.8 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -999.9 MB). Peak memory consumption was 58.3 MB. Max. memory is 7.1 GB. [2018-10-24 16:13:53,423 INFO L168 Benchmark]: Boogie Preprocessor took 344.91 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 54.1 MB). Peak memory consumption was 54.1 MB. Max. memory is 7.1 GB. [2018-10-24 16:13:53,423 INFO L168 Benchmark]: RCFGBuilder took 9030.82 ms. Allocated memory was 2.3 GB in the beginning and 2.6 GB in the end (delta: 215.0 MB). Free memory was 2.2 GB in the beginning and 2.3 GB in the end (delta: -160.1 MB). Peak memory consumption was 617.6 MB. Max. memory is 7.1 GB. [2018-10-24 16:13:53,426 INFO L168 Benchmark]: TraceAbstraction took 221299.08 ms. Allocated memory was 2.6 GB in the beginning and 4.8 GB in the end (delta: 2.3 GB). Free memory was 2.3 GB in the beginning and 3.7 GB in the end (delta: -1.4 GB). Peak memory consumption was 847.4 MB. Max. memory is 7.1 GB. [2018-10-24 16:13:53,432 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 2136.76 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 200.8 MB). Peak memory consumption was 200.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 673.90 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 804.8 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -999.9 MB). Peak memory consumption was 58.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 344.91 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 54.1 MB). Peak memory consumption was 54.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 9030.82 ms. Allocated memory was 2.3 GB in the beginning and 2.6 GB in the end (delta: 215.0 MB). Free memory was 2.2 GB in the beginning and 2.3 GB in the end (delta: -160.1 MB). Peak memory consumption was 617.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 221299.08 ms. Allocated memory was 2.6 GB in the beginning and 4.8 GB in the end (delta: 2.3 GB). Free memory was 2.3 GB in the beginning and 3.7 GB in the end (delta: -1.4 GB). Peak memory consumption was 847.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 189]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 189). Cancelled while BasicCegarLoop was constructing difference of abstraction (244451states) and FLOYD_HOARE automaton (currently 4 states, 4 states before enhancement),while ReachableStatesComputation was computing reachable states (201320 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 819 locations, 1 error locations. TIMEOUT Result, 221.2s OverallTime, 15 OverallIterations, 5 TraceHistogramMax, 191.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 9498 SDtfs, 45235 SDslu, 1433 SDs, 0 SdLazy, 86071 SolverSat, 15515 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 147.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1395 GetRequests, 1329 SyntacticMatches, 12 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 4.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=244451occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 17.0s AutomataMinimizationTime, 14 MinimizatonAttempts, 142229 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 7.4s InterpolantComputationTime, 6777 NumberOfCodeBlocks, 6777 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 6758 ConstructedInterpolants, 0 QuantifiedInterpolants, 7893585 SizeOfPredicates, 4 NumberOfNonLiveVariables, 1694 ConjunctsInSsa, 17 ConjunctsInUnsatCore, 19 InterpolantComputations, 13 PerfectInterpolantSequences, 6980/7303 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown