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/Problem11_label45_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 16:07:22,735 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 16:07:22,737 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 16:07:22,749 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 16:07:22,750 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 16:07:22,751 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 16:07:22,752 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 16:07:22,754 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 16:07:22,755 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 16:07:22,756 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 16:07:22,757 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 16:07:22,757 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 16:07:22,758 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 16:07:22,759 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 16:07:22,761 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 16:07:22,761 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 16:07:22,762 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 16:07:22,764 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 16:07:22,766 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 16:07:22,768 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 16:07:22,769 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 16:07:22,770 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 16:07:22,772 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-24 16:07:22,772 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-24 16:07:22,773 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-24 16:07:22,773 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-24 16:07:22,774 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-24 16:07:22,775 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-24 16:07:22,776 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-24 16:07:22,777 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-24 16:07:22,777 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-24 16:07:22,778 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-24 16:07:22,778 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-24 16:07:22,779 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-24 16:07:22,780 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-24 16:07:22,780 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-24 16:07:22,781 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 16:07:22,805 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 16:07:22,805 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 16:07:22,806 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 16:07:22,806 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 16:07:22,810 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 16:07:22,811 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 16:07:22,811 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 16:07:22,811 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 16:07:22,811 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 16:07:22,811 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 16:07:22,813 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 16:07:22,813 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 16:07:22,813 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 16:07:22,813 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 16:07:22,813 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 16:07:22,814 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 16:07:22,814 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 16:07:22,814 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 16:07:22,814 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 16:07:22,814 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 16:07:22,815 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 16:07:22,816 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 16:07:22,816 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 16:07:22,816 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 16:07:22,817 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 16:07:22,817 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 16:07:22,817 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 16:07:22,817 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 16:07:22,860 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 16:07:22,873 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 16:07:22,876 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 16:07:22,878 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 16:07:22,878 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 16:07:22,879 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label45_true-unreach-call.c [2018-10-24 16:07:22,940 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/8ae89a2b3/4255d9a136ae44adae8d19c373016a8a/FLAG7759936d7 [2018-10-24 16:07:23,579 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 16:07:23,580 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label45_true-unreach-call.c [2018-10-24 16:07:23,596 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/8ae89a2b3/4255d9a136ae44adae8d19c373016a8a/FLAG7759936d7 [2018-10-24 16:07:23,625 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/8ae89a2b3/4255d9a136ae44adae8d19c373016a8a [2018-10-24 16:07:23,638 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 16:07:23,640 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 16:07:23,641 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 16:07:23,641 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 16:07:23,645 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 16:07:23,646 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:07:23" (1/1) ... [2018-10-24 16:07:23,649 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44a6a4ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:07:23, skipping insertion in model container [2018-10-24 16:07:23,649 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:07:23" (1/1) ... [2018-10-24 16:07:23,660 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 16:07:23,748 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 16:07:24,321 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 16:07:24,325 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 16:07:24,574 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 16:07:24,596 INFO L193 MainTranslator]: Completed translation [2018-10-24 16:07:24,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:07:24 WrapperNode [2018-10-24 16:07:24,597 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 16:07:24,599 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 16:07:24,599 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 16:07:24,599 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 16:07:24,610 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:07:24" (1/1) ... [2018-10-24 16:07:24,651 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:07:24" (1/1) ... [2018-10-24 16:07:24,919 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 16:07:24,919 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 16:07:24,919 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 16:07:24,920 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 16:07:24,931 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:07:24" (1/1) ... [2018-10-24 16:07:24,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:07:24" (1/1) ... [2018-10-24 16:07:24,941 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:07:24" (1/1) ... [2018-10-24 16:07:24,942 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:07:24" (1/1) ... [2018-10-24 16:07:24,998 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:07:24" (1/1) ... [2018-10-24 16:07:25,018 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:07:24" (1/1) ... [2018-10-24 16:07:25,048 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:07:24" (1/1) ... [2018-10-24 16:07:25,068 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 16:07:25,068 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 16:07:25,068 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 16:07:25,069 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 16:07:25,070 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:07:24" (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 16:07:25,142 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-24 16:07:25,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 16:07:25,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 16:07:29,975 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 16:07:29,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:07:29 BoogieIcfgContainer [2018-10-24 16:07:29,977 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 16:07:29,978 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 16:07:29,978 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 16:07:29,981 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 16:07:29,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 04:07:23" (1/3) ... [2018-10-24 16:07:29,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d23c49d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:07:29, skipping insertion in model container [2018-10-24 16:07:29,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:07:24" (2/3) ... [2018-10-24 16:07:29,983 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d23c49d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:07:29, skipping insertion in model container [2018-10-24 16:07:29,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:07:29" (3/3) ... [2018-10-24 16:07:29,985 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label45_true-unreach-call.c [2018-10-24 16:07:29,996 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 16:07:30,006 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 16:07:30,024 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 16:07:30,069 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 16:07:30,070 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 16:07:30,070 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 16:07:30,070 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 16:07:30,070 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 16:07:30,071 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 16:07:30,071 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 16:07:30,071 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 16:07:30,071 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 16:07:30,104 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states. [2018-10-24 16:07:30,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-24 16:07:30,112 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:07:30,114 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] [2018-10-24 16:07:30,116 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:07:30,123 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:07:30,123 INFO L82 PathProgramCache]: Analyzing trace with hash 575043410, now seen corresponding path program 1 times [2018-10-24 16:07:30,125 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:07:30,125 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:07:30,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:07:30,178 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:07:30,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:07:30,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:07:30,581 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 16:07:30,586 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:07:30,587 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:07:30,592 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:07:30,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:07:30,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:07:30,616 INFO L87 Difference]: Start difference. First operand 284 states. Second operand 4 states. [2018-10-24 16:07:34,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:07:34,055 INFO L93 Difference]: Finished difference Result 972 states and 1744 transitions. [2018-10-24 16:07:34,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:07:34,058 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2018-10-24 16:07:34,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:07:34,084 INFO L225 Difference]: With dead ends: 972 [2018-10-24 16:07:34,084 INFO L226 Difference]: Without dead ends: 681 [2018-10-24 16:07:34,090 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 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 16:07:34,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2018-10-24 16:07:34,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 469. [2018-10-24 16:07:34,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2018-10-24 16:07:34,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 728 transitions. [2018-10-24 16:07:34,208 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 728 transitions. Word has length 33 [2018-10-24 16:07:34,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:07:34,208 INFO L481 AbstractCegarLoop]: Abstraction has 469 states and 728 transitions. [2018-10-24 16:07:34,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:07:34,209 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 728 transitions. [2018-10-24 16:07:34,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-24 16:07:34,215 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:07:34,215 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:07:34,218 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:07:34,218 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:07:34,218 INFO L82 PathProgramCache]: Analyzing trace with hash -294278150, now seen corresponding path program 1 times [2018-10-24 16:07:34,218 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:07:34,219 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:07:34,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:07:34,220 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:07:34,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:07:34,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:07:34,632 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:07:34,633 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:07:34,633 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:07:34,635 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:07:34,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:07:34,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:07:34,636 INFO L87 Difference]: Start difference. First operand 469 states and 728 transitions. Second operand 4 states. [2018-10-24 16:07:38,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:07:38,528 INFO L93 Difference]: Finished difference Result 1695 states and 2717 transitions. [2018-10-24 16:07:38,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:07:38,529 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 102 [2018-10-24 16:07:38,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:07:38,537 INFO L225 Difference]: With dead ends: 1695 [2018-10-24 16:07:38,537 INFO L226 Difference]: Without dead ends: 1228 [2018-10-24 16:07:38,541 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 16:07:38,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2018-10-24 16:07:38,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 1214. [2018-10-24 16:07:38,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1214 states. [2018-10-24 16:07:38,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 1784 transitions. [2018-10-24 16:07:38,587 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 1784 transitions. Word has length 102 [2018-10-24 16:07:38,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:07:38,588 INFO L481 AbstractCegarLoop]: Abstraction has 1214 states and 1784 transitions. [2018-10-24 16:07:38,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:07:38,588 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 1784 transitions. [2018-10-24 16:07:38,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-10-24 16:07:38,592 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:07:38,593 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:07:38,593 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:07:38,593 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:07:38,593 INFO L82 PathProgramCache]: Analyzing trace with hash -263297828, now seen corresponding path program 1 times [2018-10-24 16:07:38,594 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:07:38,594 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:07:38,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:07:38,595 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:07:38,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:07:38,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:07:38,845 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:07:38,845 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:07:38,845 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:07:38,846 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:07:38,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:07:38,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:07:38,847 INFO L87 Difference]: Start difference. First operand 1214 states and 1784 transitions. Second operand 4 states. [2018-10-24 16:07:43,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:07:43,247 INFO L93 Difference]: Finished difference Result 4657 states and 6912 transitions. [2018-10-24 16:07:43,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:07:43,248 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 105 [2018-10-24 16:07:43,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:07:43,265 INFO L225 Difference]: With dead ends: 4657 [2018-10-24 16:07:43,265 INFO L226 Difference]: Without dead ends: 3445 [2018-10-24 16:07:43,268 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 16:07:43,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3445 states. [2018-10-24 16:07:43,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3445 to 3445. [2018-10-24 16:07:43,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3445 states. [2018-10-24 16:07:43,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3445 states to 3445 states and 4375 transitions. [2018-10-24 16:07:43,333 INFO L78 Accepts]: Start accepts. Automaton has 3445 states and 4375 transitions. Word has length 105 [2018-10-24 16:07:43,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:07:43,334 INFO L481 AbstractCegarLoop]: Abstraction has 3445 states and 4375 transitions. [2018-10-24 16:07:43,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:07:43,334 INFO L276 IsEmpty]: Start isEmpty. Operand 3445 states and 4375 transitions. [2018-10-24 16:07:43,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-10-24 16:07:43,343 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:07:43,345 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:07:43,345 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:07:43,345 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:07:43,346 INFO L82 PathProgramCache]: Analyzing trace with hash 316350140, now seen corresponding path program 1 times [2018-10-24 16:07:43,346 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:07:43,346 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:07:43,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:07:43,347 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:07:43,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:07:43,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:07:43,607 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:07:43,607 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:07:43,607 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:07:43,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:07:43,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:07:43,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:07:43,608 INFO L87 Difference]: Start difference. First operand 3445 states and 4375 transitions. Second operand 5 states. [2018-10-24 16:07:48,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:07:48,139 INFO L93 Difference]: Finished difference Result 10825 states and 14157 transitions. [2018-10-24 16:07:48,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 16:07:48,140 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 161 [2018-10-24 16:07:48,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:07:48,175 INFO L225 Difference]: With dead ends: 10825 [2018-10-24 16:07:48,176 INFO L226 Difference]: Without dead ends: 7567 [2018-10-24 16:07:48,182 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:07:48,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7567 states. [2018-10-24 16:07:48,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7567 to 7566. [2018-10-24 16:07:48,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7566 states. [2018-10-24 16:07:48,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7566 states to 7566 states and 9466 transitions. [2018-10-24 16:07:48,395 INFO L78 Accepts]: Start accepts. Automaton has 7566 states and 9466 transitions. Word has length 161 [2018-10-24 16:07:48,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:07:48,396 INFO L481 AbstractCegarLoop]: Abstraction has 7566 states and 9466 transitions. [2018-10-24 16:07:48,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:07:48,397 INFO L276 IsEmpty]: Start isEmpty. Operand 7566 states and 9466 transitions. [2018-10-24 16:07:48,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-10-24 16:07:48,404 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:07:48,404 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:07:48,405 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:07:48,405 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:07:48,405 INFO L82 PathProgramCache]: Analyzing trace with hash -2090882901, now seen corresponding path program 1 times [2018-10-24 16:07:48,405 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:07:48,405 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:07:48,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:07:48,408 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:07:48,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:07:48,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:07:48,860 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2018-10-24 16:07:48,860 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:07:48,860 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:07:48,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:07:48,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:07:48,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:07:48,862 INFO L87 Difference]: Start difference. First operand 7566 states and 9466 transitions. Second operand 4 states. [2018-10-24 16:07:51,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:07:51,183 INFO L93 Difference]: Finished difference Result 14971 states and 18789 transitions. [2018-10-24 16:07:51,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:07:51,183 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 228 [2018-10-24 16:07:51,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:07:51,215 INFO L225 Difference]: With dead ends: 14971 [2018-10-24 16:07:51,215 INFO L226 Difference]: Without dead ends: 7592 [2018-10-24 16:07:51,225 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 16:07:51,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7592 states. [2018-10-24 16:07:51,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7592 to 7565. [2018-10-24 16:07:51,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7565 states. [2018-10-24 16:07:51,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7565 states to 7565 states and 8984 transitions. [2018-10-24 16:07:51,361 INFO L78 Accepts]: Start accepts. Automaton has 7565 states and 8984 transitions. Word has length 228 [2018-10-24 16:07:51,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:07:51,362 INFO L481 AbstractCegarLoop]: Abstraction has 7565 states and 8984 transitions. [2018-10-24 16:07:51,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:07:51,362 INFO L276 IsEmpty]: Start isEmpty. Operand 7565 states and 8984 transitions. [2018-10-24 16:07:51,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2018-10-24 16:07:51,367 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:07:51,367 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:07:51,367 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:07:51,368 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:07:51,368 INFO L82 PathProgramCache]: Analyzing trace with hash -506625732, now seen corresponding path program 1 times [2018-10-24 16:07:51,368 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:07:51,368 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:07:51,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:07:51,369 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:07:51,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:07:51,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:07:51,817 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:07:51,818 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:07:51,818 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:07:51,818 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:07:51,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:07:51,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:07:51,819 INFO L87 Difference]: Start difference. First operand 7565 states and 8984 transitions. Second operand 4 states. [2018-10-24 16:07:53,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:07:53,865 INFO L93 Difference]: Finished difference Result 19035 states and 23078 transitions. [2018-10-24 16:07:53,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:07:53,865 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 229 [2018-10-24 16:07:53,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:07:53,909 INFO L225 Difference]: With dead ends: 19035 [2018-10-24 16:07:53,909 INFO L226 Difference]: Without dead ends: 11657 [2018-10-24 16:07:53,919 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 16:07:53,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11657 states. [2018-10-24 16:07:54,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11657 to 11080. [2018-10-24 16:07:54,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11080 states. [2018-10-24 16:07:54,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11080 states to 11080 states and 13221 transitions. [2018-10-24 16:07:54,105 INFO L78 Accepts]: Start accepts. Automaton has 11080 states and 13221 transitions. Word has length 229 [2018-10-24 16:07:54,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:07:54,105 INFO L481 AbstractCegarLoop]: Abstraction has 11080 states and 13221 transitions. [2018-10-24 16:07:54,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:07:54,106 INFO L276 IsEmpty]: Start isEmpty. Operand 11080 states and 13221 transitions. [2018-10-24 16:07:54,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2018-10-24 16:07:54,116 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:07:54,117 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:07:54,117 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:07:54,117 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:07:54,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1732908421, now seen corresponding path program 1 times [2018-10-24 16:07:54,118 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:07:54,118 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:07:54,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:07:54,119 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:07:54,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:07:54,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:07:54,533 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 227 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2018-10-24 16:07:54,533 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:07:54,533 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:07:54,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 16:07:54,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 16:07:54,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:07:54,535 INFO L87 Difference]: Start difference. First operand 11080 states and 13221 transitions. Second operand 3 states. [2018-10-24 16:07:55,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:07:55,949 INFO L93 Difference]: Finished difference Result 25300 states and 30301 transitions. [2018-10-24 16:07:55,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 16:07:55,950 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 285 [2018-10-24 16:07:55,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:07:55,975 INFO L225 Difference]: With dead ends: 25300 [2018-10-24 16:07:55,976 INFO L226 Difference]: Without dead ends: 13654 [2018-10-24 16:07:55,988 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 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 16:07:55,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13654 states. [2018-10-24 16:07:56,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13654 to 13282. [2018-10-24 16:07:56,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13282 states. [2018-10-24 16:07:56,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13282 states to 13282 states and 15179 transitions. [2018-10-24 16:07:56,153 INFO L78 Accepts]: Start accepts. Automaton has 13282 states and 15179 transitions. Word has length 285 [2018-10-24 16:07:56,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:07:56,153 INFO L481 AbstractCegarLoop]: Abstraction has 13282 states and 15179 transitions. [2018-10-24 16:07:56,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 16:07:56,154 INFO L276 IsEmpty]: Start isEmpty. Operand 13282 states and 15179 transitions. [2018-10-24 16:07:56,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2018-10-24 16:07:56,167 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:07:56,168 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:07:56,168 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:07:56,168 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:07:56,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1591903917, now seen corresponding path program 1 times [2018-10-24 16:07:56,168 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:07:56,169 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:07:56,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:07:56,169 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:07:56,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:07:56,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:07:56,513 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 258 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2018-10-24 16:07:56,514 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:07:56,514 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:07:56,515 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 16:07:56,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 16:07:56,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:07:56,515 INFO L87 Difference]: Start difference. First operand 13282 states and 15179 transitions. Second operand 3 states. [2018-10-24 16:07:57,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:07:57,903 INFO L93 Difference]: Finished difference Result 27314 states and 31303 transitions. [2018-10-24 16:07:57,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 16:07:57,904 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 328 [2018-10-24 16:07:57,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:07:57,927 INFO L225 Difference]: With dead ends: 27314 [2018-10-24 16:07:57,927 INFO L226 Difference]: Without dead ends: 12720 [2018-10-24 16:07:57,942 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 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 16:07:57,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12720 states. [2018-10-24 16:07:58,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12720 to 12345. [2018-10-24 16:07:58,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12345 states. [2018-10-24 16:07:58,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12345 states to 12345 states and 13968 transitions. [2018-10-24 16:07:58,104 INFO L78 Accepts]: Start accepts. Automaton has 12345 states and 13968 transitions. Word has length 328 [2018-10-24 16:07:58,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:07:58,105 INFO L481 AbstractCegarLoop]: Abstraction has 12345 states and 13968 transitions. [2018-10-24 16:07:58,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 16:07:58,105 INFO L276 IsEmpty]: Start isEmpty. Operand 12345 states and 13968 transitions. [2018-10-24 16:07:58,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2018-10-24 16:07:58,119 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:07:58,120 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:07:58,120 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:07:58,120 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:07:58,120 INFO L82 PathProgramCache]: Analyzing trace with hash 326232789, now seen corresponding path program 1 times [2018-10-24 16:07:58,120 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:07:58,121 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:07:58,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:07:58,122 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:07:58,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:07:58,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:07:58,829 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:07:58,830 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:07:58,830 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 16:07:58,838 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:07:58,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:07:58,984 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:07:59,520 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 61 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:07:59,542 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:07:59,543 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2018-10-24 16:07:59,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 16:07:59,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 16:07:59,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-24 16:07:59,545 INFO L87 Difference]: Start difference. First operand 12345 states and 13968 transitions. Second operand 9 states. [2018-10-24 16:08:09,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:08:09,104 INFO L93 Difference]: Finished difference Result 38270 states and 43536 transitions. [2018-10-24 16:08:09,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-24 16:08:09,104 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 333 [2018-10-24 16:08:09,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:08:09,148 INFO L225 Difference]: With dead ends: 38270 [2018-10-24 16:08:09,148 INFO L226 Difference]: Without dead ends: 27043 [2018-10-24 16:08:09,163 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 329 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-24 16:08:09,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27043 states. [2018-10-24 16:08:09,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27043 to 21838. [2018-10-24 16:08:09,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21838 states. [2018-10-24 16:08:09,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21838 states to 21838 states and 24508 transitions. [2018-10-24 16:08:09,618 INFO L78 Accepts]: Start accepts. Automaton has 21838 states and 24508 transitions. Word has length 333 [2018-10-24 16:08:09,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:08:09,619 INFO L481 AbstractCegarLoop]: Abstraction has 21838 states and 24508 transitions. [2018-10-24 16:08:09,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-24 16:08:09,619 INFO L276 IsEmpty]: Start isEmpty. Operand 21838 states and 24508 transitions. [2018-10-24 16:08:09,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2018-10-24 16:08:09,641 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:08:09,641 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:08:09,641 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:08:09,642 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:08:09,642 INFO L82 PathProgramCache]: Analyzing trace with hash -249180895, now seen corresponding path program 1 times [2018-10-24 16:08:09,642 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:08:09,642 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:08:09,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:08:09,643 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:08:09,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:08:09,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:08:10,381 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 328 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-10-24 16:08:10,382 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:08:10,382 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:08:10,383 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:08:10,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:08:10,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:08:10,383 INFO L87 Difference]: Start difference. First operand 21838 states and 24508 transitions. Second operand 5 states. [2018-10-24 16:08:15,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:08:15,248 INFO L93 Difference]: Finished difference Result 55730 states and 62701 transitions. [2018-10-24 16:08:15,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 16:08:15,248 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 341 [2018-10-24 16:08:15,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:08:15,299 INFO L225 Difference]: With dead ends: 55730 [2018-10-24 16:08:15,299 INFO L226 Difference]: Without dead ends: 34079 [2018-10-24 16:08:15,322 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:08:15,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34079 states. [2018-10-24 16:08:15,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34079 to 31658. [2018-10-24 16:08:15,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31658 states. [2018-10-24 16:08:15,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31658 states to 31658 states and 34860 transitions. [2018-10-24 16:08:15,710 INFO L78 Accepts]: Start accepts. Automaton has 31658 states and 34860 transitions. Word has length 341 [2018-10-24 16:08:15,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:08:15,710 INFO L481 AbstractCegarLoop]: Abstraction has 31658 states and 34860 transitions. [2018-10-24 16:08:15,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:08:15,711 INFO L276 IsEmpty]: Start isEmpty. Operand 31658 states and 34860 transitions. [2018-10-24 16:08:15,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2018-10-24 16:08:15,730 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:08:15,730 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-24 16:08:15,730 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:08:15,731 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:08:15,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1530952089, now seen corresponding path program 1 times [2018-10-24 16:08:15,731 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:08:15,731 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:08:15,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:08:15,732 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:08:15,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:08:15,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:08:16,568 WARN L179 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 11 [2018-10-24 16:08:17,030 WARN L179 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 12 [2018-10-24 16:08:17,316 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 242 proven. 106 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-10-24 16:08:17,316 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:08:17,316 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 16:08:17,329 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:08:17,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:08:17,439 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:08:17,990 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2018-10-24 16:08:18,011 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:08:18,011 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2018-10-24 16:08:18,012 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 16:08:18,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 16:08:18,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-10-24 16:08:18,013 INFO L87 Difference]: Start difference. First operand 31658 states and 34860 transitions. Second operand 9 states. [2018-10-24 16:08:28,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:08:28,108 INFO L93 Difference]: Finished difference Result 72597 states and 79705 transitions. [2018-10-24 16:08:28,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-24 16:08:28,108 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 344 [2018-10-24 16:08:28,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:08:28,166 INFO L225 Difference]: With dead ends: 72597 [2018-10-24 16:08:28,166 INFO L226 Difference]: Without dead ends: 34406 [2018-10-24 16:08:28,195 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2018-10-24 16:08:28,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34406 states. [2018-10-24 16:08:28,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34406 to 32364. [2018-10-24 16:08:28,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32364 states. [2018-10-24 16:08:28,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32364 states to 32364 states and 35297 transitions. [2018-10-24 16:08:28,983 INFO L78 Accepts]: Start accepts. Automaton has 32364 states and 35297 transitions. Word has length 344 [2018-10-24 16:08:28,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:08:28,984 INFO L481 AbstractCegarLoop]: Abstraction has 32364 states and 35297 transitions. [2018-10-24 16:08:28,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-24 16:08:28,984 INFO L276 IsEmpty]: Start isEmpty. Operand 32364 states and 35297 transitions. [2018-10-24 16:08:29,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2018-10-24 16:08:29,000 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:08:29,001 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-24 16:08:29,001 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:08:29,001 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:08:29,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1571378605, now seen corresponding path program 1 times [2018-10-24 16:08:29,002 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:08:29,002 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:08:29,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:08:29,003 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:08:29,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:08:29,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:08:29,476 WARN L179 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 8 [2018-10-24 16:08:29,576 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 348 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-10-24 16:08:29,577 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:08:29,577 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:08:29,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:08:29,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:08:29,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:08:29,578 INFO L87 Difference]: Start difference. First operand 32364 states and 35297 transitions. Second operand 4 states. [2018-10-24 16:08:31,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:08:31,433 INFO L93 Difference]: Finished difference Result 60855 states and 66434 transitions. [2018-10-24 16:08:31,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:08:31,433 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 359 [2018-10-24 16:08:31,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:08:31,469 INFO L225 Difference]: With dead ends: 60855 [2018-10-24 16:08:31,470 INFO L226 Difference]: Without dead ends: 36118 [2018-10-24 16:08:31,487 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:08:31,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36118 states. [2018-10-24 16:08:31,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36118 to 32931. [2018-10-24 16:08:31,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32931 states. [2018-10-24 16:08:31,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32931 states to 32931 states and 35800 transitions. [2018-10-24 16:08:31,873 INFO L78 Accepts]: Start accepts. Automaton has 32931 states and 35800 transitions. Word has length 359 [2018-10-24 16:08:31,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:08:31,874 INFO L481 AbstractCegarLoop]: Abstraction has 32931 states and 35800 transitions. [2018-10-24 16:08:31,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:08:31,874 INFO L276 IsEmpty]: Start isEmpty. Operand 32931 states and 35800 transitions. [2018-10-24 16:08:31,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2018-10-24 16:08:31,890 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:08:31,891 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 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 16:08:31,891 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:08:31,891 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:08:31,892 INFO L82 PathProgramCache]: Analyzing trace with hash -711972748, now seen corresponding path program 1 times [2018-10-24 16:08:31,892 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:08:31,892 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:08:31,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:08:31,893 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:08:31,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:08:31,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:08:32,389 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 290 proven. 103 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-10-24 16:08:32,390 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:08:32,390 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 16:08:32,398 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:08:32,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:08:32,505 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:08:32,695 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 290 proven. 103 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-10-24 16:08:32,727 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:08:32,728 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 4 [2018-10-24 16:08:32,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:08:32,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:08:32,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:08:32,729 INFO L87 Difference]: Start difference. First operand 32931 states and 35800 transitions. Second operand 5 states. [2018-10-24 16:08:37,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:08:37,076 INFO L93 Difference]: Finished difference Result 64186 states and 69600 transitions. [2018-10-24 16:08:37,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-24 16:08:37,076 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 409 [2018-10-24 16:08:37,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:08:37,103 INFO L225 Difference]: With dead ends: 64186 [2018-10-24 16:08:37,103 INFO L226 Difference]: Without dead ends: 34596 [2018-10-24 16:08:37,121 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 407 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-24 16:08:37,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34596 states. [2018-10-24 16:08:37,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34596 to 29940. [2018-10-24 16:08:37,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29940 states. [2018-10-24 16:08:37,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29940 states to 29940 states and 32206 transitions. [2018-10-24 16:08:37,397 INFO L78 Accepts]: Start accepts. Automaton has 29940 states and 32206 transitions. Word has length 409 [2018-10-24 16:08:37,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:08:37,397 INFO L481 AbstractCegarLoop]: Abstraction has 29940 states and 32206 transitions. [2018-10-24 16:08:37,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:08:37,397 INFO L276 IsEmpty]: Start isEmpty. Operand 29940 states and 32206 transitions. [2018-10-24 16:08:37,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2018-10-24 16:08:37,412 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:08:37,412 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, 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, 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 16:08:37,412 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:08:37,413 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:08:37,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1562337051, now seen corresponding path program 1 times [2018-10-24 16:08:37,413 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:08:37,413 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:08:37,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:08:37,414 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:08:37,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:08:37,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:08:38,776 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 0 proven. 556 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-10-24 16:08:38,777 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:08:38,777 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 16:08:38,787 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:08:38,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:08:38,898 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:08:39,291 WARN L179 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 43 [2018-10-24 16:08:42,130 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 354 proven. 31 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2018-10-24 16:08:42,150 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:08:42,151 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2018-10-24 16:08:42,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-24 16:08:42,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-24 16:08:42,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-10-24 16:08:42,152 INFO L87 Difference]: Start difference. First operand 29940 states and 32206 transitions. Second operand 8 states. [2018-10-24 16:08:55,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:08:55,605 INFO L93 Difference]: Finished difference Result 62126 states and 66894 transitions. [2018-10-24 16:08:55,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-24 16:08:55,605 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 419 [2018-10-24 16:08:55,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:08:55,638 INFO L225 Difference]: With dead ends: 62126 [2018-10-24 16:08:55,638 INFO L226 Difference]: Without dead ends: 35714 [2018-10-24 16:08:55,654 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 425 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2018-10-24 16:08:55,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35714 states. [2018-10-24 16:08:55,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35714 to 28446. [2018-10-24 16:08:55,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28446 states. [2018-10-24 16:08:55,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28446 states to 28446 states and 30583 transitions. [2018-10-24 16:08:55,926 INFO L78 Accepts]: Start accepts. Automaton has 28446 states and 30583 transitions. Word has length 419 [2018-10-24 16:08:55,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:08:55,926 INFO L481 AbstractCegarLoop]: Abstraction has 28446 states and 30583 transitions. [2018-10-24 16:08:55,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-24 16:08:55,927 INFO L276 IsEmpty]: Start isEmpty. Operand 28446 states and 30583 transitions. [2018-10-24 16:08:55,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2018-10-24 16:08:55,939 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:08:55,940 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, 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, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-24 16:08:55,940 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:08:55,940 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:08:55,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1889678859, now seen corresponding path program 1 times [2018-10-24 16:08:55,940 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:08:55,941 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:08:55,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:08:55,941 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:08:55,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:08:55,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:08:56,712 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 134 proven. 465 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2018-10-24 16:08:56,712 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:08:56,713 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:08:56,720 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:08:56,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:08:56,848 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:08:57,709 WARN L179 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 27 [2018-10-24 16:08:58,693 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 260 proven. 339 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2018-10-24 16:08:58,714 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:08:58,714 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2018-10-24 16:08:58,715 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-24 16:08:58,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-24 16:08:58,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2018-10-24 16:08:58,716 INFO L87 Difference]: Start difference. First operand 28446 states and 30583 transitions. Second operand 12 states. [2018-10-24 16:09:09,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:09:09,181 INFO L93 Difference]: Finished difference Result 55575 states and 59795 transitions. [2018-10-24 16:09:09,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-24 16:09:09,183 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 452 [2018-10-24 16:09:09,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:09:09,210 INFO L225 Difference]: With dead ends: 55575 [2018-10-24 16:09:09,210 INFO L226 Difference]: Without dead ends: 29176 [2018-10-24 16:09:09,224 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 447 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=160, Invalid=302, Unknown=0, NotChecked=0, Total=462 [2018-10-24 16:09:09,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29176 states. [2018-10-24 16:09:09,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29176 to 26451. [2018-10-24 16:09:09,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26451 states. [2018-10-24 16:09:09,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26451 states to 26451 states and 28311 transitions. [2018-10-24 16:09:09,472 INFO L78 Accepts]: Start accepts. Automaton has 26451 states and 28311 transitions. Word has length 452 [2018-10-24 16:09:09,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:09:09,472 INFO L481 AbstractCegarLoop]: Abstraction has 26451 states and 28311 transitions. [2018-10-24 16:09:09,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-24 16:09:09,472 INFO L276 IsEmpty]: Start isEmpty. Operand 26451 states and 28311 transitions. [2018-10-24 16:09:09,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2018-10-24 16:09:09,483 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:09:09,484 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:09:09,484 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:09:09,484 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:09:09,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1264069308, now seen corresponding path program 1 times [2018-10-24 16:09:09,485 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:09:09,485 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:09:09,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:09:09,485 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:09:09,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:09:09,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:09:09,884 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-24 16:09:10,694 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 463 proven. 162 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-10-24 16:09:10,694 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:09:10,694 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:09:10,707 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:09:10,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:09:10,839 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:09:11,258 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 467 proven. 158 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-10-24 16:09:11,278 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:09:11,279 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 9 [2018-10-24 16:09:11,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-24 16:09:11,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-24 16:09:11,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-10-24 16:09:11,280 INFO L87 Difference]: Start difference. First operand 26451 states and 28311 transitions. Second operand 10 states. [2018-10-24 16:09:19,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:09:19,041 INFO L93 Difference]: Finished difference Result 65114 states and 69663 transitions. [2018-10-24 16:09:19,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-24 16:09:19,042 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 508 [2018-10-24 16:09:19,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:09:19,074 INFO L225 Difference]: With dead ends: 65114 [2018-10-24 16:09:19,074 INFO L226 Difference]: Without dead ends: 40703 [2018-10-24 16:09:19,090 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 505 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=185, Invalid=321, Unknown=0, NotChecked=0, Total=506 [2018-10-24 16:09:19,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40703 states. [2018-10-24 16:09:19,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40703 to 22551. [2018-10-24 16:09:19,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22551 states. [2018-10-24 16:09:19,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22551 states to 22551 states and 24146 transitions. [2018-10-24 16:09:19,334 INFO L78 Accepts]: Start accepts. Automaton has 22551 states and 24146 transitions. Word has length 508 [2018-10-24 16:09:19,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:09:19,334 INFO L481 AbstractCegarLoop]: Abstraction has 22551 states and 24146 transitions. [2018-10-24 16:09:19,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-24 16:09:19,334 INFO L276 IsEmpty]: Start isEmpty. Operand 22551 states and 24146 transitions. [2018-10-24 16:09:19,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 526 [2018-10-24 16:09:19,342 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:09:19,342 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-24 16:09:19,342 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:09:19,342 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:09:19,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1912565945, now seen corresponding path program 1 times [2018-10-24 16:09:19,343 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:09:19,343 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:09:19,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:09:19,343 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:09:19,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:09:19,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:09:19,924 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-10-24 16:09:20,954 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 92 proven. 319 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2018-10-24 16:09:20,955 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:09:20,955 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:09:20,963 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:09:21,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:09:21,098 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:09:21,843 WARN L179 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2018-10-24 16:09:23,900 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 92 proven. 319 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2018-10-24 16:09:23,921 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:09:23,921 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2018-10-24 16:09:23,922 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-24 16:09:23,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-24 16:09:23,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-10-24 16:09:23,923 INFO L87 Difference]: Start difference. First operand 22551 states and 24146 transitions. Second operand 12 states. [2018-10-24 16:09:24,925 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2018-10-24 16:09:27,658 WARN L179 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2018-10-24 16:09:31,900 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 30 [2018-10-24 16:09:32,854 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2018-10-24 16:09:35,626 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 32 [2018-10-24 16:09:37,655 WARN L179 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2018-10-24 16:09:38,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:09:38,372 INFO L93 Difference]: Finished difference Result 46563 states and 49827 transitions. [2018-10-24 16:09:38,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-24 16:09:38,374 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 525 [2018-10-24 16:09:38,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:09:38,397 INFO L225 Difference]: With dead ends: 46563 [2018-10-24 16:09:38,397 INFO L226 Difference]: Without dead ends: 25681 [2018-10-24 16:09:38,410 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 512 SyntacticMatches, 11 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=269, Invalid=661, Unknown=0, NotChecked=0, Total=930 [2018-10-24 16:09:38,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25681 states. [2018-10-24 16:09:38,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25681 to 20493. [2018-10-24 16:09:38,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20493 states. [2018-10-24 16:09:38,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20493 states to 20493 states and 21930 transitions. [2018-10-24 16:09:38,638 INFO L78 Accepts]: Start accepts. Automaton has 20493 states and 21930 transitions. Word has length 525 [2018-10-24 16:09:38,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:09:38,639 INFO L481 AbstractCegarLoop]: Abstraction has 20493 states and 21930 transitions. [2018-10-24 16:09:38,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-24 16:09:38,639 INFO L276 IsEmpty]: Start isEmpty. Operand 20493 states and 21930 transitions. [2018-10-24 16:09:38,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 544 [2018-10-24 16:09:38,647 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:09:38,648 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:09:38,648 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:09:38,648 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:09:38,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1849402497, now seen corresponding path program 1 times [2018-10-24 16:09:38,648 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:09:38,649 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:09:38,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:09:38,649 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:09:38,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:09:38,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:09:39,282 WARN L179 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 11 [2018-10-24 16:09:39,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 839 proven. 0 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2018-10-24 16:09:39,492 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:09:39,492 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:09:39,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:09:39,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:09:39,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:09:39,494 INFO L87 Difference]: Start difference. First operand 20493 states and 21930 transitions. Second operand 4 states. [2018-10-24 16:09:42,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:09:42,839 INFO L93 Difference]: Finished difference Result 39878 states and 42722 transitions. [2018-10-24 16:09:42,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:09:42,840 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 543 [2018-10-24 16:09:42,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:09:42,855 INFO L225 Difference]: With dead ends: 39878 [2018-10-24 16:09:42,856 INFO L226 Difference]: Without dead ends: 21796 [2018-10-24 16:09:42,865 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:09:42,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21796 states. [2018-10-24 16:09:43,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21796 to 19935. [2018-10-24 16:09:43,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19935 states. [2018-10-24 16:09:43,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19935 states to 19935 states and 21189 transitions. [2018-10-24 16:09:43,044 INFO L78 Accepts]: Start accepts. Automaton has 19935 states and 21189 transitions. Word has length 543 [2018-10-24 16:09:43,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:09:43,044 INFO L481 AbstractCegarLoop]: Abstraction has 19935 states and 21189 transitions. [2018-10-24 16:09:43,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:09:43,044 INFO L276 IsEmpty]: Start isEmpty. Operand 19935 states and 21189 transitions. [2018-10-24 16:09:43,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 555 [2018-10-24 16:09:43,054 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:09:43,055 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, 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, 4, 4, 4, 4, 4, 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, 1, 1, 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 16:09:43,055 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:09:43,055 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:09:43,056 INFO L82 PathProgramCache]: Analyzing trace with hash 956786045, now seen corresponding path program 1 times [2018-10-24 16:09:43,056 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:09:43,056 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:09:43,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:09:43,057 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:09:43,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:09:43,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:09:43,564 WARN L179 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 9 [2018-10-24 16:09:43,816 WARN L179 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 7 [2018-10-24 16:09:44,082 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 395 proven. 0 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2018-10-24 16:09:44,082 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:09:44,083 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 16:09:44,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:09:44,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:09:44,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:09:44,084 INFO L87 Difference]: Start difference. First operand 19935 states and 21189 transitions. Second operand 5 states. [2018-10-24 16:09:46,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:09:46,977 INFO L93 Difference]: Finished difference Result 37090 states and 39456 transitions. [2018-10-24 16:09:46,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-24 16:09:46,978 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 554 [2018-10-24 16:09:46,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:09:46,992 INFO L225 Difference]: With dead ends: 37090 [2018-10-24 16:09:46,992 INFO L226 Difference]: Without dead ends: 19938 [2018-10-24 16:09:47,000 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-24 16:09:47,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19938 states. [2018-10-24 16:09:47,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19938 to 18825. [2018-10-24 16:09:47,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18825 states. [2018-10-24 16:09:47,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18825 states to 18825 states and 19965 transitions. [2018-10-24 16:09:47,177 INFO L78 Accepts]: Start accepts. Automaton has 18825 states and 19965 transitions. Word has length 554 [2018-10-24 16:09:47,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:09:47,177 INFO L481 AbstractCegarLoop]: Abstraction has 18825 states and 19965 transitions. [2018-10-24 16:09:47,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:09:47,177 INFO L276 IsEmpty]: Start isEmpty. Operand 18825 states and 19965 transitions. [2018-10-24 16:09:47,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 641 [2018-10-24 16:09:47,192 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:09:47,192 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, 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, 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, 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] [2018-10-24 16:09:47,192 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:09:47,193 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:09:47,193 INFO L82 PathProgramCache]: Analyzing trace with hash -847476356, now seen corresponding path program 1 times [2018-10-24 16:09:47,193 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:09:47,193 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:09:47,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:09:47,194 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:09:47,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:09:47,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:09:47,786 INFO L134 CoverageAnalysis]: Checked inductivity of 949 backedges. 555 proven. 0 refuted. 0 times theorem prover too weak. 394 trivial. 0 not checked. [2018-10-24 16:09:47,786 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:09:47,787 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 16:09:47,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 16:09:47,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 16:09:47,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-24 16:09:47,788 INFO L87 Difference]: Start difference. First operand 18825 states and 19965 transitions. Second operand 6 states. [2018-10-24 16:09:50,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:09:50,882 INFO L93 Difference]: Finished difference Result 43034 states and 45613 transitions. [2018-10-24 16:09:50,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-24 16:09:50,883 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 640 [2018-10-24 16:09:50,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:09:50,908 INFO L225 Difference]: With dead ends: 43034 [2018-10-24 16:09:50,908 INFO L226 Difference]: Without dead ends: 26992 [2018-10-24 16:09:50,918 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-24 16:09:50,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26992 states. [2018-10-24 16:09:51,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26992 to 18264. [2018-10-24 16:09:51,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18264 states. [2018-10-24 16:09:51,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18264 states to 18264 states and 19356 transitions. [2018-10-24 16:09:51,136 INFO L78 Accepts]: Start accepts. Automaton has 18264 states and 19356 transitions. Word has length 640 [2018-10-24 16:09:51,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:09:51,136 INFO L481 AbstractCegarLoop]: Abstraction has 18264 states and 19356 transitions. [2018-10-24 16:09:51,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 16:09:51,136 INFO L276 IsEmpty]: Start isEmpty. Operand 18264 states and 19356 transitions. [2018-10-24 16:09:51,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 648 [2018-10-24 16:09:51,147 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:09:51,147 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2018-10-24 16:09:51,147 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:09:51,148 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:09:51,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1534956161, now seen corresponding path program 1 times [2018-10-24 16:09:51,148 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:09:51,148 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:09:51,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:09:51,149 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:09:51,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:09:51,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:09:51,955 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 3 [2018-10-24 16:09:52,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1189 backedges. 595 proven. 0 refuted. 0 times theorem prover too weak. 594 trivial. 0 not checked. [2018-10-24 16:09:52,208 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:09:52,208 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 16:09:52,208 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 16:09:52,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 16:09:52,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-24 16:09:52,209 INFO L87 Difference]: Start difference. First operand 18264 states and 19356 transitions. Second operand 6 states. [2018-10-24 16:09:55,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:09:55,652 INFO L93 Difference]: Finished difference Result 39864 states and 42236 transitions. [2018-10-24 16:09:55,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-24 16:09:55,653 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 647 [2018-10-24 16:09:55,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:09:55,671 INFO L225 Difference]: With dead ends: 39864 [2018-10-24 16:09:55,671 INFO L226 Difference]: Without dead ends: 24383 [2018-10-24 16:09:55,681 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-24 16:09:55,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24383 states. [2018-10-24 16:09:55,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24383 to 16774. [2018-10-24 16:09:55,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16774 states. [2018-10-24 16:09:55,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16774 states to 16774 states and 17788 transitions. [2018-10-24 16:09:55,884 INFO L78 Accepts]: Start accepts. Automaton has 16774 states and 17788 transitions. Word has length 647 [2018-10-24 16:09:55,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:09:55,884 INFO L481 AbstractCegarLoop]: Abstraction has 16774 states and 17788 transitions. [2018-10-24 16:09:55,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 16:09:55,884 INFO L276 IsEmpty]: Start isEmpty. Operand 16774 states and 17788 transitions. [2018-10-24 16:09:55,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 679 [2018-10-24 16:09:55,895 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:09:55,896 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, 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, 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:09:55,896 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:09:55,896 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:09:55,896 INFO L82 PathProgramCache]: Analyzing trace with hash 725576367, now seen corresponding path program 1 times [2018-10-24 16:09:55,896 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:09:55,896 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:09:55,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:09:55,897 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:09:55,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:09:55,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:09:57,066 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 5 [2018-10-24 16:09:57,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 31 proven. 979 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:09:57,643 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:09:57,643 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:09:57,652 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:09:57,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:09:57,836 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:09:59,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 156 proven. 854 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:09:59,433 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:09:59,434 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 12 [2018-10-24 16:09:59,435 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-24 16:09:59,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-24 16:09:59,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2018-10-24 16:09:59,436 INFO L87 Difference]: Start difference. First operand 16774 states and 17788 transitions. Second operand 13 states. [2018-10-24 16:10:07,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:10:07,869 INFO L93 Difference]: Finished difference Result 45241 states and 47969 transitions. [2018-10-24 16:10:07,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-24 16:10:07,872 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 678 [2018-10-24 16:10:07,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:10:07,898 INFO L225 Difference]: With dead ends: 45241 [2018-10-24 16:10:07,899 INFO L226 Difference]: Without dead ends: 30880 [2018-10-24 16:10:07,910 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 689 GetRequests, 672 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2018-10-24 16:10:07,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30880 states. [2018-10-24 16:10:08,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30880 to 19762. [2018-10-24 16:10:08,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19762 states. [2018-10-24 16:10:08,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19762 states to 19762 states and 20966 transitions. [2018-10-24 16:10:08,172 INFO L78 Accepts]: Start accepts. Automaton has 19762 states and 20966 transitions. Word has length 678 [2018-10-24 16:10:08,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:10:08,173 INFO L481 AbstractCegarLoop]: Abstraction has 19762 states and 20966 transitions. [2018-10-24 16:10:08,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-24 16:10:08,173 INFO L276 IsEmpty]: Start isEmpty. Operand 19762 states and 20966 transitions. [2018-10-24 16:10:08,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 687 [2018-10-24 16:10:08,184 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:10:08,185 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, 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, 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, 2, 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 16:10:08,185 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:10:08,185 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:10:08,185 INFO L82 PathProgramCache]: Analyzing trace with hash -817217683, now seen corresponding path program 1 times [2018-10-24 16:10:08,186 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:10:08,186 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:10:08,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:10:08,186 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:10:08,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:10:08,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:10:09,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 0 proven. 1009 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:10:09,674 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:10:09,674 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:10:09,682 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:10:09,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:10:09,865 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:10:32,866 WARN L179 SmtUtils]: Spent 22.18 s on a formula simplification. DAG size of input: 646 DAG size of output: 70 [2018-10-24 16:10:33,784 WARN L179 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 45 [2018-10-24 16:10:37,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 683 proven. 201 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2018-10-24 16:10:37,033 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:10:37,034 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-10-24 16:10:37,035 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-24 16:10:37,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-24 16:10:37,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2018-10-24 16:10:37,035 INFO L87 Difference]: Start difference. First operand 19762 states and 20966 transitions. Second operand 12 states. [2018-10-24 16:10:38,743 WARN L179 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 52 [2018-10-24 16:10:54,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:10:54,019 INFO L93 Difference]: Finished difference Result 52702 states and 55847 transitions. [2018-10-24 16:10:54,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-24 16:10:54,019 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 686 [2018-10-24 16:10:54,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:10:54,050 INFO L225 Difference]: With dead ends: 52702 [2018-10-24 16:10:54,050 INFO L226 Difference]: Without dead ends: 35540 [2018-10-24 16:10:54,063 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 700 GetRequests, 684 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 24.6s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2018-10-24 16:10:54,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35540 states. [2018-10-24 16:10:54,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35540 to 18656. [2018-10-24 16:10:54,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18656 states. [2018-10-24 16:10:54,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18656 states to 18656 states and 19773 transitions. [2018-10-24 16:10:54,350 INFO L78 Accepts]: Start accepts. Automaton has 18656 states and 19773 transitions. Word has length 686 [2018-10-24 16:10:54,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:10:54,351 INFO L481 AbstractCegarLoop]: Abstraction has 18656 states and 19773 transitions. [2018-10-24 16:10:54,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-24 16:10:54,351 INFO L276 IsEmpty]: Start isEmpty. Operand 18656 states and 19773 transitions. [2018-10-24 16:10:54,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 711 [2018-10-24 16:10:54,361 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:10:54,362 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 5, 5, 5, 5, 5, 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, 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] [2018-10-24 16:10:54,362 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:10:54,362 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:10:54,362 INFO L82 PathProgramCache]: Analyzing trace with hash 922977328, now seen corresponding path program 1 times [2018-10-24 16:10:54,362 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:10:54,363 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:10:54,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:10:54,363 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:10:54,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:10:54,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:10:56,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1298 backedges. 122 proven. 1025 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2018-10-24 16:10:56,418 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:10:56,418 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:10:56,426 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:10:56,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:10:56,604 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:10:56,999 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 24 [2018-10-24 16:10:58,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1298 backedges. 870 proven. 62 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2018-10-24 16:10:58,212 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:10:58,212 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2018-10-24 16:10:58,213 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-24 16:10:58,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-24 16:10:58,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-10-24 16:10:58,214 INFO L87 Difference]: Start difference. First operand 18656 states and 19773 transitions. Second operand 11 states. Received shutdown request... [2018-10-24 16:11:12,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-24 16:11:12,228 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 16:11:12,234 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 16:11:12,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 04:11:12 BoogieIcfgContainer [2018-10-24 16:11:12,235 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 16:11:12,235 INFO L168 Benchmark]: Toolchain (without parser) took 228597.16 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 1.6 GB in the end (delta: -143.8 MB). Peak memory consumption was 2.4 GB. Max. memory is 7.1 GB. [2018-10-24 16:11:12,237 INFO L168 Benchmark]: CDTParser took 0.21 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 16:11:12,237 INFO L168 Benchmark]: CACSL2BoogieTranslator took 956.40 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 63.4 MB). Peak memory consumption was 63.4 MB. Max. memory is 7.1 GB. [2018-10-24 16:11:12,240 INFO L168 Benchmark]: Boogie Procedure Inliner took 320.31 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 752.9 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -842.1 MB). Peak memory consumption was 24.2 MB. Max. memory is 7.1 GB. [2018-10-24 16:11:12,241 INFO L168 Benchmark]: Boogie Preprocessor took 148.78 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 16:11:12,241 INFO L168 Benchmark]: RCFGBuilder took 4908.52 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 195.1 MB). Peak memory consumption was 195.1 MB. Max. memory is 7.1 GB. [2018-10-24 16:11:12,242 INFO L168 Benchmark]: TraceAbstraction took 222256.76 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 2.0 GB in the beginning and 1.6 GB in the end (delta: 439.7 MB). Peak memory consumption was 2.3 GB. Max. memory is 7.1 GB. [2018-10-24 16:11:12,247 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 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 956.40 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 63.4 MB). Peak memory consumption was 63.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 320.31 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 752.9 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -842.1 MB). Peak memory consumption was 24.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 148.78 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 4908.52 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 195.1 MB). Peak memory consumption was 195.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 222256.76 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 2.0 GB in the beginning and 1.6 GB in the end (delta: 439.7 MB). Peak memory consumption was 2.3 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 102]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 102). Cancelled while BasicCegarLoop was constructing difference of abstraction (18656states) and FLOYD_HOARE automaton (currently 18 states, 11 states before enhancement),while ReachableStatesComputation was computing reachable states (7745 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 284 locations, 1 error locations. TIMEOUT Result, 222.1s OverallTime, 24 OverallIterations, 6 TraceHistogramMax, 153.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3767 SDtfs, 27004 SDslu, 4249 SDs, 0 SdLazy, 74711 SolverSat, 8249 SolverUnsat, 8 SolverUnknown, 0 SolverNotchecked, 127.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5285 GetRequests, 5060 SyntacticMatches, 33 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 43.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32931occurred in iteration=12, 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: 5.6s AutomataMinimizationTime, 23 MinimizatonAttempts, 99735 StatesRemovedByMinimization, 22 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 2.2s SatisfiabilityAnalysisTime, 53.1s InterpolantComputationTime, 14683 NumberOfCodeBlocks, 14683 NumberOfCodeBlocksAsserted, 34 NumberOfCheckSat, 14649 ConstructedInterpolants, 780 QuantifiedInterpolants, 64697262 SizeOfPredicates, 21 NumberOfNonLiveVariables, 6501 ConjunctsInSsa, 96 ConjunctsInUnsatCore, 34 InterpolantComputations, 14 PerfectInterpolantSequences, 12025/19400 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown