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/Problem03_label25_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 14:57:14,757 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 14:57:14,759 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 14:57:14,773 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 14:57:14,774 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 14:57:14,775 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 14:57:14,776 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 14:57:14,778 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 14:57:14,781 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 14:57:14,782 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 14:57:14,784 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 14:57:14,785 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 14:57:14,786 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 14:57:14,787 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 14:57:14,790 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 14:57:14,791 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 14:57:14,792 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 14:57:14,801 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 14:57:14,806 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 14:57:14,808 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 14:57:14,809 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 14:57:14,813 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 14:57:14,817 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 14:57:14,832 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 14:57:14,861 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 14:57:14,861 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 14:57:14,862 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 14:57:14,862 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 14:57:14,864 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 14:57:14,864 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 14:57:14,864 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 14:57:14,864 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 14:57:14,866 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 14:57:14,866 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 14:57:14,866 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 14:57:14,866 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 14:57:14,867 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 14:57:14,867 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 14:57:14,867 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 14:57:14,867 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 14:57:14,867 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 14:57:14,868 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 14:57:14,868 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 14:57:14,868 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 14:57:14,868 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 14:57:14,868 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 14:57:14,869 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 14:57:14,869 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 14:57:14,869 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 14:57:14,869 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 14:57:14,869 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 14:57:14,870 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 14:57:14,930 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 14:57:14,943 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 14:57:14,946 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 14:57:14,948 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 14:57:14,948 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 14:57:14,949 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label25_true-unreach-call.c [2018-10-24 14:57:15,007 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/e7e863250/248367aa8780487db14719ece8755455/FLAGd43ccf7ef [2018-10-24 14:57:15,641 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 14:57:15,641 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label25_true-unreach-call.c [2018-10-24 14:57:15,664 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/e7e863250/248367aa8780487db14719ece8755455/FLAGd43ccf7ef [2018-10-24 14:57:15,685 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/e7e863250/248367aa8780487db14719ece8755455 [2018-10-24 14:57:15,696 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 14:57:15,697 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 14:57:15,698 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 14:57:15,699 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 14:57:15,702 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 14:57:15,703 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:57:15" (1/1) ... [2018-10-24 14:57:15,706 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b295a00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:57:15, skipping insertion in model container [2018-10-24 14:57:15,707 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:57:15" (1/1) ... [2018-10-24 14:57:15,717 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 14:57:15,801 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 14:57:16,570 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 14:57:16,576 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 14:57:16,871 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 14:57:16,895 INFO L193 MainTranslator]: Completed translation [2018-10-24 14:57:16,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:57:16 WrapperNode [2018-10-24 14:57:16,896 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 14:57:16,898 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 14:57:16,898 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 14:57:16,898 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 14:57:16,907 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:57:16" (1/1) ... [2018-10-24 14:57:16,957 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:57:16" (1/1) ... [2018-10-24 14:57:17,213 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 14:57:17,214 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 14:57:17,214 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 14:57:17,214 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 14:57:17,226 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:57:16" (1/1) ... [2018-10-24 14:57:17,226 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:57:16" (1/1) ... [2018-10-24 14:57:17,239 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:57:16" (1/1) ... [2018-10-24 14:57:17,239 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:57:16" (1/1) ... [2018-10-24 14:57:17,290 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:57:16" (1/1) ... [2018-10-24 14:57:17,305 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:57:16" (1/1) ... [2018-10-24 14:57:17,332 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:57:16" (1/1) ... [2018-10-24 14:57:17,356 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 14:57:17,357 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 14:57:17,357 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 14:57:17,357 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 14:57:17,358 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:57:16" (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 14:57:17,429 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-24 14:57:17,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 14:57:17,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 14:57:22,478 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 14:57:22,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:57:22 BoogieIcfgContainer [2018-10-24 14:57:22,479 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 14:57:22,480 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 14:57:22,480 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 14:57:22,483 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 14:57:22,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:57:15" (1/3) ... [2018-10-24 14:57:22,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45c4e2f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:57:22, skipping insertion in model container [2018-10-24 14:57:22,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:57:16" (2/3) ... [2018-10-24 14:57:22,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45c4e2f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:57:22, skipping insertion in model container [2018-10-24 14:57:22,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:57:22" (3/3) ... [2018-10-24 14:57:22,487 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label25_true-unreach-call.c [2018-10-24 14:57:22,498 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 14:57:22,507 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 14:57:22,525 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 14:57:22,565 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 14:57:22,566 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 14:57:22,566 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 14:57:22,567 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 14:57:22,567 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 14:57:22,567 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 14:57:22,567 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 14:57:22,567 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 14:57:22,568 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 14:57:22,605 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states. [2018-10-24 14:57:22,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-10-24 14:57:22,627 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:57:22,629 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:57:22,631 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:57:22,636 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:57:22,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1142527790, now seen corresponding path program 1 times [2018-10-24 14:57:22,639 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:57:22,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:57:22,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:57:22,689 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:57:22,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:57:22,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:57:23,532 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 14:57:23,535 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:57:23,536 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 14:57:23,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:57:23,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:57:23,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:57:23,560 INFO L87 Difference]: Start difference. First operand 303 states. Second operand 4 states. [2018-10-24 14:57:27,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:57:27,251 INFO L93 Difference]: Finished difference Result 1027 states and 1865 transitions. [2018-10-24 14:57:27,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:57:27,253 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 181 [2018-10-24 14:57:27,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:57:27,277 INFO L225 Difference]: With dead ends: 1027 [2018-10-24 14:57:27,277 INFO L226 Difference]: Without dead ends: 717 [2018-10-24 14:57:27,283 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 14:57:27,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2018-10-24 14:57:27,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 715. [2018-10-24 14:57:27,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 715 states. [2018-10-24 14:57:27,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 1145 transitions. [2018-10-24 14:57:27,397 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 1145 transitions. Word has length 181 [2018-10-24 14:57:27,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:57:27,398 INFO L481 AbstractCegarLoop]: Abstraction has 715 states and 1145 transitions. [2018-10-24 14:57:27,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:57:27,398 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 1145 transitions. [2018-10-24 14:57:27,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-10-24 14:57:27,406 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:57:27,406 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:57:27,406 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:57:27,407 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:57:27,407 INFO L82 PathProgramCache]: Analyzing trace with hash -71550157, now seen corresponding path program 1 times [2018-10-24 14:57:27,407 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:57:27,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:57:27,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:57:27,409 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:57:27,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:57:27,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:57:27,567 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:57:27,567 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:57:27,568 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 14:57:27,570 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 14:57:27,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 14:57:27,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 14:57:27,571 INFO L87 Difference]: Start difference. First operand 715 states and 1145 transitions. Second operand 3 states. [2018-10-24 14:57:29,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:57:29,478 INFO L93 Difference]: Finished difference Result 2058 states and 3347 transitions. [2018-10-24 14:57:29,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 14:57:29,479 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 190 [2018-10-24 14:57:29,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:57:29,487 INFO L225 Difference]: With dead ends: 2058 [2018-10-24 14:57:29,488 INFO L226 Difference]: Without dead ends: 1345 [2018-10-24 14:57:29,492 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 14:57:29,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1345 states. [2018-10-24 14:57:29,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1345 to 1331. [2018-10-24 14:57:29,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1331 states. [2018-10-24 14:57:29,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 2076 transitions. [2018-10-24 14:57:29,546 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 2076 transitions. Word has length 190 [2018-10-24 14:57:29,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:57:29,546 INFO L481 AbstractCegarLoop]: Abstraction has 1331 states and 2076 transitions. [2018-10-24 14:57:29,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 14:57:29,546 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 2076 transitions. [2018-10-24 14:57:29,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-10-24 14:57:29,552 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:57:29,553 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:57:29,553 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:57:29,553 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:57:29,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1566196018, now seen corresponding path program 1 times [2018-10-24 14:57:29,554 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:57:29,554 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:57:29,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:57:29,555 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:57:29,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:57:29,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:57:29,694 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-24 14:57:29,694 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:57:29,695 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 14:57:29,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 14:57:29,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 14:57:29,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 14:57:29,696 INFO L87 Difference]: Start difference. First operand 1331 states and 2076 transitions. Second operand 3 states. [2018-10-24 14:57:32,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:57:32,009 INFO L93 Difference]: Finished difference Result 3977 states and 6209 transitions. [2018-10-24 14:57:32,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 14:57:32,013 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 204 [2018-10-24 14:57:32,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:57:32,027 INFO L225 Difference]: With dead ends: 3977 [2018-10-24 14:57:32,027 INFO L226 Difference]: Without dead ends: 2648 [2018-10-24 14:57:32,030 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 14:57:32,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2648 states. [2018-10-24 14:57:32,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2648 to 2645. [2018-10-24 14:57:32,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2645 states. [2018-10-24 14:57:32,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2645 states to 2645 states and 4120 transitions. [2018-10-24 14:57:32,104 INFO L78 Accepts]: Start accepts. Automaton has 2645 states and 4120 transitions. Word has length 204 [2018-10-24 14:57:32,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:57:32,104 INFO L481 AbstractCegarLoop]: Abstraction has 2645 states and 4120 transitions. [2018-10-24 14:57:32,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 14:57:32,105 INFO L276 IsEmpty]: Start isEmpty. Operand 2645 states and 4120 transitions. [2018-10-24 14:57:32,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-10-24 14:57:32,112 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:57:32,113 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:57:32,113 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:57:32,113 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:57:32,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1900454302, now seen corresponding path program 1 times [2018-10-24 14:57:32,114 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:57:32,114 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:57:32,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:57:32,118 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:57:32,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:57:32,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:57:32,308 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-10-24 14:57:32,308 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:57:32,308 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 14:57:32,309 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 14:57:32,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 14:57:32,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 14:57:32,310 INFO L87 Difference]: Start difference. First operand 2645 states and 4120 transitions. Second operand 3 states. [2018-10-24 14:57:33,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:57:33,459 INFO L93 Difference]: Finished difference Result 5250 states and 8186 transitions. [2018-10-24 14:57:33,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 14:57:33,460 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 212 [2018-10-24 14:57:33,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:57:33,473 INFO L225 Difference]: With dead ends: 5250 [2018-10-24 14:57:33,473 INFO L226 Difference]: Without dead ends: 2607 [2018-10-24 14:57:33,477 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 14:57:33,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2607 states. [2018-10-24 14:57:33,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2607 to 2607. [2018-10-24 14:57:33,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2607 states. [2018-10-24 14:57:33,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2607 states to 2607 states and 3992 transitions. [2018-10-24 14:57:33,531 INFO L78 Accepts]: Start accepts. Automaton has 2607 states and 3992 transitions. Word has length 212 [2018-10-24 14:57:33,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:57:33,531 INFO L481 AbstractCegarLoop]: Abstraction has 2607 states and 3992 transitions. [2018-10-24 14:57:33,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 14:57:33,531 INFO L276 IsEmpty]: Start isEmpty. Operand 2607 states and 3992 transitions. [2018-10-24 14:57:33,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2018-10-24 14:57:33,537 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:57:33,537 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:57:33,537 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:57:33,538 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:57:33,538 INFO L82 PathProgramCache]: Analyzing trace with hash 513716310, now seen corresponding path program 1 times [2018-10-24 14:57:33,538 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:57:33,538 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:57:33,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:57:33,539 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:57:33,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:57:33,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:57:33,841 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:57:33,841 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:57:33,842 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:57:33,842 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 14:57:33,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 14:57:33,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 14:57:33,843 INFO L87 Difference]: Start difference. First operand 2607 states and 3992 transitions. Second operand 5 states. [2018-10-24 14:57:38,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:57:38,925 INFO L93 Difference]: Finished difference Result 6279 states and 9778 transitions. [2018-10-24 14:57:38,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 14:57:38,926 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 221 [2018-10-24 14:57:38,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:57:38,943 INFO L225 Difference]: With dead ends: 6279 [2018-10-24 14:57:38,943 INFO L226 Difference]: Without dead ends: 3674 [2018-10-24 14:57:38,948 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 14:57:38,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3674 states. [2018-10-24 14:57:38,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3674 to 3015. [2018-10-24 14:57:38,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3015 states. [2018-10-24 14:57:39,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3015 states to 3015 states and 4612 transitions. [2018-10-24 14:57:39,006 INFO L78 Accepts]: Start accepts. Automaton has 3015 states and 4612 transitions. Word has length 221 [2018-10-24 14:57:39,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:57:39,006 INFO L481 AbstractCegarLoop]: Abstraction has 3015 states and 4612 transitions. [2018-10-24 14:57:39,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 14:57:39,006 INFO L276 IsEmpty]: Start isEmpty. Operand 3015 states and 4612 transitions. [2018-10-24 14:57:39,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2018-10-24 14:57:39,013 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:57:39,013 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:57:39,013 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:57:39,014 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:57:39,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1356125514, now seen corresponding path program 1 times [2018-10-24 14:57:39,014 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:57:39,014 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:57:39,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:57:39,015 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:57:39,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:57:39,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:57:39,227 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 62 proven. 10 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-24 14:57:39,228 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:57:39,228 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 14:57:39,237 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:57:39,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:57:39,412 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:57:39,491 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-10-24 14:57:39,515 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 14:57:39,516 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 3 [2018-10-24 14:57:39,516 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:57:39,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:57:39,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:57:39,517 INFO L87 Difference]: Start difference. First operand 3015 states and 4612 transitions. Second operand 4 states. [2018-10-24 14:57:43,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:57:43,559 INFO L93 Difference]: Finished difference Result 12048 states and 18435 transitions. [2018-10-24 14:57:43,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:57:43,561 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 257 [2018-10-24 14:57:43,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:57:43,604 INFO L225 Difference]: With dead ends: 12048 [2018-10-24 14:57:43,605 INFO L226 Difference]: Without dead ends: 9035 [2018-10-24 14:57:43,612 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 257 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:57:43,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9035 states. [2018-10-24 14:57:43,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9035 to 6022. [2018-10-24 14:57:43,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6022 states. [2018-10-24 14:57:43,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6022 states to 6022 states and 9192 transitions. [2018-10-24 14:57:43,756 INFO L78 Accepts]: Start accepts. Automaton has 6022 states and 9192 transitions. Word has length 257 [2018-10-24 14:57:43,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:57:43,756 INFO L481 AbstractCegarLoop]: Abstraction has 6022 states and 9192 transitions. [2018-10-24 14:57:43,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:57:43,756 INFO L276 IsEmpty]: Start isEmpty. Operand 6022 states and 9192 transitions. [2018-10-24 14:57:43,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2018-10-24 14:57:43,767 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:57:43,768 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:57:43,768 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:57:43,768 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:57:43,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1301877585, now seen corresponding path program 1 times [2018-10-24 14:57:43,769 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:57:43,769 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:57:43,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:57:43,770 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:57:43,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:57:43,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:57:43,983 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-24 14:57:43,985 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:57:43,985 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 14:57:43,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 14:57:43,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 14:57:43,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 14:57:43,986 INFO L87 Difference]: Start difference. First operand 6022 states and 9192 transitions. Second operand 3 states. [2018-10-24 14:57:45,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:57:45,603 INFO L93 Difference]: Finished difference Result 17361 states and 26560 transitions. [2018-10-24 14:57:45,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 14:57:45,604 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 257 [2018-10-24 14:57:45,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:57:45,653 INFO L225 Difference]: With dead ends: 17361 [2018-10-24 14:57:45,653 INFO L226 Difference]: Without dead ends: 11341 [2018-10-24 14:57:45,664 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 14:57:45,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11341 states. [2018-10-24 14:57:45,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11341 to 11337. [2018-10-24 14:57:45,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11337 states. [2018-10-24 14:57:45,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11337 states to 11337 states and 15999 transitions. [2018-10-24 14:57:45,947 INFO L78 Accepts]: Start accepts. Automaton has 11337 states and 15999 transitions. Word has length 257 [2018-10-24 14:57:45,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:57:45,948 INFO L481 AbstractCegarLoop]: Abstraction has 11337 states and 15999 transitions. [2018-10-24 14:57:45,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 14:57:45,948 INFO L276 IsEmpty]: Start isEmpty. Operand 11337 states and 15999 transitions. [2018-10-24 14:57:45,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2018-10-24 14:57:45,963 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:57:45,963 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:57:45,964 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:57:45,964 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:57:45,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1155660912, now seen corresponding path program 1 times [2018-10-24 14:57:45,964 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:57:45,965 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:57:45,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:57:45,966 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:57:45,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:57:46,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:57:46,345 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:57:46,345 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:57:46,345 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 14:57:46,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:57:46,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:57:46,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:57:46,346 INFO L87 Difference]: Start difference. First operand 11337 states and 15999 transitions. Second operand 4 states. [2018-10-24 14:57:49,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:57:49,226 INFO L93 Difference]: Finished difference Result 41584 states and 58255 transitions. [2018-10-24 14:57:49,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:57:49,227 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 260 [2018-10-24 14:57:49,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:57:49,293 INFO L225 Difference]: With dead ends: 41584 [2018-10-24 14:57:49,293 INFO L226 Difference]: Without dead ends: 30249 [2018-10-24 14:57:49,311 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 14:57:49,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30249 states. [2018-10-24 14:57:49,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30249 to 21129. [2018-10-24 14:57:49,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21129 states. [2018-10-24 14:57:49,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21129 states to 21129 states and 28285 transitions. [2018-10-24 14:57:49,648 INFO L78 Accepts]: Start accepts. Automaton has 21129 states and 28285 transitions. Word has length 260 [2018-10-24 14:57:49,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:57:49,648 INFO L481 AbstractCegarLoop]: Abstraction has 21129 states and 28285 transitions. [2018-10-24 14:57:49,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:57:49,649 INFO L276 IsEmpty]: Start isEmpty. Operand 21129 states and 28285 transitions. [2018-10-24 14:57:49,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2018-10-24 14:57:49,675 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:57:49,676 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:57:49,676 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:57:49,676 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:57:49,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1969755881, now seen corresponding path program 1 times [2018-10-24 14:57:49,676 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:57:49,676 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:57:49,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:57:49,678 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:57:49,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:57:49,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:57:49,845 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2018-10-24 14:57:49,846 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:57:49,846 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 14:57:49,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 14:57:49,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 14:57:49,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 14:57:49,847 INFO L87 Difference]: Start difference. First operand 21129 states and 28285 transitions. Second operand 3 states. [2018-10-24 14:57:51,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:57:51,677 INFO L93 Difference]: Finished difference Result 42264 states and 56582 transitions. [2018-10-24 14:57:51,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 14:57:51,678 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 264 [2018-10-24 14:57:51,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:57:51,712 INFO L225 Difference]: With dead ends: 42264 [2018-10-24 14:57:51,713 INFO L226 Difference]: Without dead ends: 21137 [2018-10-24 14:57:51,734 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 14:57:51,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21137 states. [2018-10-24 14:57:51,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21137 to 21129. [2018-10-24 14:57:51,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21129 states. [2018-10-24 14:57:52,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21129 states to 21129 states and 25984 transitions. [2018-10-24 14:57:52,002 INFO L78 Accepts]: Start accepts. Automaton has 21129 states and 25984 transitions. Word has length 264 [2018-10-24 14:57:52,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:57:52,003 INFO L481 AbstractCegarLoop]: Abstraction has 21129 states and 25984 transitions. [2018-10-24 14:57:52,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 14:57:52,003 INFO L276 IsEmpty]: Start isEmpty. Operand 21129 states and 25984 transitions. [2018-10-24 14:57:52,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2018-10-24 14:57:52,026 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:57:52,027 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:57:52,027 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:57:52,027 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:57:52,028 INFO L82 PathProgramCache]: Analyzing trace with hash -362354461, now seen corresponding path program 1 times [2018-10-24 14:57:52,028 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:57:52,028 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:57:52,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:57:52,029 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:57:52,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:57:52,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:57:52,412 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 4 [2018-10-24 14:57:52,708 WARN L179 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 7 [2018-10-24 14:57:52,902 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 11 [2018-10-24 14:57:53,099 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 108 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:57:53,099 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:57:53,099 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 14:57:53,109 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:57:53,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:57:53,252 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:57:53,366 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-10-24 14:57:53,388 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 14:57:53,388 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2018-10-24 14:57:53,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-24 14:57:53,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-24 14:57:53,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-24 14:57:53,390 INFO L87 Difference]: Start difference. First operand 21129 states and 25984 transitions. Second operand 8 states. [2018-10-24 14:58:01,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:58:01,851 INFO L93 Difference]: Finished difference Result 125275 states and 151816 transitions. [2018-10-24 14:58:01,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-24 14:58:01,851 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 277 [2018-10-24 14:58:01,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:58:01,991 INFO L225 Difference]: With dead ends: 125275 [2018-10-24 14:58:01,991 INFO L226 Difference]: Without dead ends: 104148 [2018-10-24 14:58:02,032 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 287 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2018-10-24 14:58:02,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104148 states. [2018-10-24 14:58:02,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104148 to 61841. [2018-10-24 14:58:02,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61841 states. [2018-10-24 14:58:02,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61841 states to 61841 states and 73684 transitions. [2018-10-24 14:58:02,965 INFO L78 Accepts]: Start accepts. Automaton has 61841 states and 73684 transitions. Word has length 277 [2018-10-24 14:58:02,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:58:02,965 INFO L481 AbstractCegarLoop]: Abstraction has 61841 states and 73684 transitions. [2018-10-24 14:58:02,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-24 14:58:02,966 INFO L276 IsEmpty]: Start isEmpty. Operand 61841 states and 73684 transitions. [2018-10-24 14:58:03,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2018-10-24 14:58:03,004 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:58:03,005 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:58:03,005 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:58:03,005 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:58:03,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1772117421, now seen corresponding path program 1 times [2018-10-24 14:58:03,006 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:58:03,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:58:03,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:58:03,007 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:58:03,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:58:03,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:58:03,641 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-10-24 14:58:03,641 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:58:03,642 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 14:58:03,642 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:58:03,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:58:03,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:58:03,643 INFO L87 Difference]: Start difference. First operand 61841 states and 73684 transitions. Second operand 4 states. [2018-10-24 14:58:05,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:58:05,286 INFO L93 Difference]: Finished difference Result 121213 states and 144472 transitions. [2018-10-24 14:58:05,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:58:05,286 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 284 [2018-10-24 14:58:05,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:58:05,338 INFO L225 Difference]: With dead ends: 121213 [2018-10-24 14:58:05,338 INFO L226 Difference]: Without dead ends: 59374 [2018-10-24 14:58:05,374 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 14:58:05,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59374 states. [2018-10-24 14:58:05,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59374 to 59374. [2018-10-24 14:58:05,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59374 states. [2018-10-24 14:58:05,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59374 states to 59374 states and 67570 transitions. [2018-10-24 14:58:05,960 INFO L78 Accepts]: Start accepts. Automaton has 59374 states and 67570 transitions. Word has length 284 [2018-10-24 14:58:05,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:58:05,960 INFO L481 AbstractCegarLoop]: Abstraction has 59374 states and 67570 transitions. [2018-10-24 14:58:05,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:58:05,960 INFO L276 IsEmpty]: Start isEmpty. Operand 59374 states and 67570 transitions. [2018-10-24 14:58:05,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2018-10-24 14:58:05,990 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:58:05,990 INFO L375 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 14:58:05,991 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:58:05,991 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:58:05,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1024180898, now seen corresponding path program 1 times [2018-10-24 14:58:05,991 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:58:05,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:58:05,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:58:05,992 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:58:05,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:58:06,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:58:06,315 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2018-10-24 14:58:06,315 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:58:06,315 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:58:06,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 14:58:06,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 14:58:06,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 14:58:06,316 INFO L87 Difference]: Start difference. First operand 59374 states and 67570 transitions. Second operand 5 states. [2018-10-24 14:58:10,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:58:10,575 INFO L93 Difference]: Finished difference Result 280787 states and 319554 transitions. [2018-10-24 14:58:10,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 14:58:10,576 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 350 [2018-10-24 14:58:10,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:58:10,826 INFO L225 Difference]: With dead ends: 280787 [2018-10-24 14:58:10,826 INFO L226 Difference]: Without dead ends: 221415 [2018-10-24 14:58:10,886 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 14:58:11,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221415 states. [2018-10-24 14:58:13,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221415 to 164304. [2018-10-24 14:58:13,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164304 states. [2018-10-24 14:58:13,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164304 states to 164304 states and 186644 transitions. [2018-10-24 14:58:13,360 INFO L78 Accepts]: Start accepts. Automaton has 164304 states and 186644 transitions. Word has length 350 [2018-10-24 14:58:13,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:58:13,360 INFO L481 AbstractCegarLoop]: Abstraction has 164304 states and 186644 transitions. [2018-10-24 14:58:13,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 14:58:13,361 INFO L276 IsEmpty]: Start isEmpty. Operand 164304 states and 186644 transitions. [2018-10-24 14:58:13,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2018-10-24 14:58:13,390 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:58:13,391 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 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 14:58:13,391 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:58:13,391 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:58:13,392 INFO L82 PathProgramCache]: Analyzing trace with hash -171426146, now seen corresponding path program 1 times [2018-10-24 14:58:13,392 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:58:13,392 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:58:13,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:58:13,393 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:58:13,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:58:13,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:58:13,800 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 207 proven. 0 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2018-10-24 14:58:13,801 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:58:13,801 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 14:58:13,802 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:58:13,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:58:13,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:58:13,802 INFO L87 Difference]: Start difference. First operand 164304 states and 186644 transitions. Second operand 4 states. [2018-10-24 14:58:17,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:58:17,208 INFO L93 Difference]: Finished difference Result 392941 states and 444718 transitions. [2018-10-24 14:58:17,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:58:17,208 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 379 [2018-10-24 14:58:17,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:58:17,458 INFO L225 Difference]: With dead ends: 392941 [2018-10-24 14:58:17,459 INFO L226 Difference]: Without dead ends: 228639 [2018-10-24 14:58:17,554 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 14:58:17,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228639 states. [2018-10-24 14:58:20,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228639 to 223663. [2018-10-24 14:58:20,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223663 states. [2018-10-24 14:58:21,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223663 states to 223663 states and 249327 transitions. [2018-10-24 14:58:21,199 INFO L78 Accepts]: Start accepts. Automaton has 223663 states and 249327 transitions. Word has length 379 [2018-10-24 14:58:21,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:58:21,199 INFO L481 AbstractCegarLoop]: Abstraction has 223663 states and 249327 transitions. [2018-10-24 14:58:21,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:58:21,199 INFO L276 IsEmpty]: Start isEmpty. Operand 223663 states and 249327 transitions. [2018-10-24 14:58:21,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2018-10-24 14:58:21,250 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:58:21,250 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:58:21,250 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:58:21,251 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:58:21,251 INFO L82 PathProgramCache]: Analyzing trace with hash 735935972, now seen corresponding path program 1 times [2018-10-24 14:58:21,251 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:58:21,251 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:58:21,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:58:21,252 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:58:21,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:58:21,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:58:21,596 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 347 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-10-24 14:58:21,596 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:58:21,596 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 14:58:21,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 14:58:21,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 14:58:21,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 14:58:21,598 INFO L87 Difference]: Start difference. First operand 223663 states and 249327 transitions. Second operand 3 states. [2018-10-24 14:58:26,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:58:26,184 INFO L93 Difference]: Finished difference Result 616140 states and 684361 transitions. [2018-10-24 14:58:26,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 14:58:26,184 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 429 [2018-10-24 14:58:26,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:58:26,679 INFO L225 Difference]: With dead ends: 616140 [2018-10-24 14:58:26,679 INFO L226 Difference]: Without dead ends: 392479 [2018-10-24 14:58:26,838 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 14:58:27,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392479 states. [2018-10-24 14:58:37,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392479 to 392479. [2018-10-24 14:58:37,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392479 states. [2018-10-24 14:58:37,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392479 states to 392479 states and 432912 transitions. [2018-10-24 14:58:37,480 INFO L78 Accepts]: Start accepts. Automaton has 392479 states and 432912 transitions. Word has length 429 [2018-10-24 14:58:37,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:58:37,480 INFO L481 AbstractCegarLoop]: Abstraction has 392479 states and 432912 transitions. [2018-10-24 14:58:37,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 14:58:37,480 INFO L276 IsEmpty]: Start isEmpty. Operand 392479 states and 432912 transitions. [2018-10-24 14:58:37,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2018-10-24 14:58:37,535 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:58:37,535 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:58:37,535 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:58:37,536 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:58:37,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1312779096, now seen corresponding path program 1 times [2018-10-24 14:58:37,536 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:58:37,536 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:58:37,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:58:37,537 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:58:37,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:58:37,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:58:38,003 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-10-24 14:58:38,209 WARN L179 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-24 14:58:38,398 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-24 14:58:39,917 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 328 proven. 29 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2018-10-24 14:58:39,918 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:58:39,918 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 14:58:39,927 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:58:40,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:58:40,103 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:58:40,447 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 247 proven. 106 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2018-10-24 14:58:40,480 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 14:58:40,480 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 3] total 11 [2018-10-24 14:58:40,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-24 14:58:40,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-24 14:58:40,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2018-10-24 14:58:40,483 INFO L87 Difference]: Start difference. First operand 392479 states and 432912 transitions. Second operand 12 states. [2018-10-24 14:58:40,735 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-10-24 14:59:14,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:59:14,349 INFO L93 Difference]: Finished difference Result 3124279 states and 3438721 transitions. [2018-10-24 14:59:14,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-24 14:59:14,349 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 431 [2018-10-24 14:59:14,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:59:35,938 INFO L225 Difference]: With dead ends: 3124279 [2018-10-24 14:59:35,938 INFO L226 Difference]: Without dead ends: 2731802 [2018-10-24 14:59:36,408 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 429 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=304, Invalid=886, Unknown=0, NotChecked=0, Total=1190 [2018-10-24 14:59:37,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2731802 states. Received shutdown request...