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/Problem17_label51_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-0fd1304 [2018-10-23 20:49:14,576 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-23 20:49:14,581 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-23 20:49:14,601 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-23 20:49:14,601 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-23 20:49:14,602 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-23 20:49:14,603 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-23 20:49:14,605 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-23 20:49:14,607 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-23 20:49:14,607 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-23 20:49:14,608 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-23 20:49:14,609 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-23 20:49:14,609 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-23 20:49:14,610 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-23 20:49:14,611 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-23 20:49:14,612 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-23 20:49:14,613 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-23 20:49:14,615 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-23 20:49:14,617 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-23 20:49:14,618 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-23 20:49:14,619 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-23 20:49:14,620 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-23 20:49:14,623 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-23 20:49:14,623 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-23 20:49:14,623 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-23 20:49:14,624 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-23 20:49:14,625 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-23 20:49:14,626 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-23 20:49:14,627 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-23 20:49:14,628 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-23 20:49:14,628 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-23 20:49:14,629 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-23 20:49:14,631 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 [2018-10-23 20:49:14,647 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-23 20:49:14,647 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-23 20:49:14,648 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-23 20:49:14,648 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-23 20:49:14,649 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-23 20:49:14,649 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-23 20:49:14,649 INFO L133 SettingsManager]: * Use SBE=true [2018-10-23 20:49:14,649 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-23 20:49:14,650 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-23 20:49:14,650 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-23 20:49:14,650 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-23 20:49:14,650 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-23 20:49:14,650 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-23 20:49:14,650 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-23 20:49:14,651 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-23 20:49:14,651 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-23 20:49:14,651 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-23 20:49:14,651 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-23 20:49:14,651 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-23 20:49:14,652 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 20:49:14,652 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-23 20:49:14,652 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-23 20:49:14,652 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-23 20:49:14,652 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-23 20:49:14,653 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-23 20:49:14,653 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-23 20:49:14,653 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-23 20:49:14,653 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-23 20:49:14,699 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-23 20:49:14,711 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-23 20:49:14,714 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-23 20:49:14,716 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-23 20:49:14,716 INFO L276 PluginConnector]: CDTParser initialized [2018-10-23 20:49:14,717 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label51_true-unreach-call.c [2018-10-23 20:49:14,774 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/e82667952/106d46345bc34538bb30e10f923ababe/FLAGb6bb307c4 [2018-10-23 20:49:15,500 INFO L298 CDTParser]: Found 1 translation units. [2018-10-23 20:49:15,501 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label51_true-unreach-call.c [2018-10-23 20:49:15,523 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/e82667952/106d46345bc34538bb30e10f923ababe/FLAGb6bb307c4 [2018-10-23 20:49:15,539 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/e82667952/106d46345bc34538bb30e10f923ababe [2018-10-23 20:49:15,551 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-23 20:49:15,553 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-23 20:49:15,554 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-23 20:49:15,554 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-23 20:49:15,558 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-23 20:49:15,559 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:49:15" (1/1) ... [2018-10-23 20:49:15,562 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10e73541 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:49:15, skipping insertion in model container [2018-10-23 20:49:15,562 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:49:15" (1/1) ... [2018-10-23 20:49:15,573 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-23 20:49:15,685 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-23 20:49:16,660 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 20:49:16,665 INFO L189 MainTranslator]: Completed pre-run [2018-10-23 20:49:17,083 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 20:49:17,105 INFO L193 MainTranslator]: Completed translation [2018-10-23 20:49:17,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:49:17 WrapperNode [2018-10-23 20:49:17,106 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-23 20:49:17,108 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-23 20:49:17,108 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-23 20:49:17,108 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-23 20:49:17,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:49:17" (1/1) ... [2018-10-23 20:49:17,174 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:49:17" (1/1) ... [2018-10-23 20:49:17,653 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-23 20:49:17,654 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-23 20:49:17,654 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-23 20:49:17,654 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-23 20:49:17,665 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:49:17" (1/1) ... [2018-10-23 20:49:17,665 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:49:17" (1/1) ... [2018-10-23 20:49:17,694 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:49:17" (1/1) ... [2018-10-23 20:49:17,694 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:49:17" (1/1) ... [2018-10-23 20:49:17,784 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:49:17" (1/1) ... [2018-10-23 20:49:17,814 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:49:17" (1/1) ... [2018-10-23 20:49:17,879 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:49:17" (1/1) ... [2018-10-23 20:49:17,941 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-23 20:49:17,941 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-23 20:49:17,942 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-23 20:49:17,942 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-23 20:49:17,943 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:49:17" (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 [2018-10-23 20:49:18,007 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-23 20:49:18,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-23 20:49:18,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-23 20:49:26,930 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-23 20:49:26,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:49:26 BoogieIcfgContainer [2018-10-23 20:49:26,931 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-23 20:49:26,933 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-23 20:49:26,933 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-23 20:49:26,936 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-23 20:49:26,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:49:15" (1/3) ... [2018-10-23 20:49:26,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3329d549 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:49:26, skipping insertion in model container [2018-10-23 20:49:26,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:49:17" (2/3) ... [2018-10-23 20:49:26,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3329d549 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:49:26, skipping insertion in model container [2018-10-23 20:49:26,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:49:26" (3/3) ... [2018-10-23 20:49:26,940 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label51_true-unreach-call.c [2018-10-23 20:49:26,950 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-23 20:49:26,960 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-23 20:49:26,979 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-23 20:49:27,028 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-23 20:49:27,028 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-23 20:49:27,029 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-23 20:49:27,029 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-23 20:49:27,029 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-23 20:49:27,029 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-23 20:49:27,029 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-23 20:49:27,030 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-23 20:49:27,030 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-23 20:49:27,073 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states. [2018-10-23 20:49:27,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-23 20:49:27,082 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:49:27,083 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] [2018-10-23 20:49:27,085 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:49:27,091 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:49:27,092 INFO L82 PathProgramCache]: Analyzing trace with hash -387853398, now seen corresponding path program 1 times [2018-10-23 20:49:27,094 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:49:27,095 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:49:27,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:49:27,152 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:49:27,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:49:27,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:49:27,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:49:27,523 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:49:27,523 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 20:49:27,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:49:27,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:49:27,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:49:27,546 INFO L87 Difference]: Start difference. First operand 591 states. Second operand 4 states. [2018-10-23 20:49:37,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:49:37,245 INFO L93 Difference]: Finished difference Result 2124 states and 3951 transitions. [2018-10-23 20:49:37,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:49:37,247 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2018-10-23 20:49:37,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:49:37,286 INFO L225 Difference]: With dead ends: 2124 [2018-10-23 20:49:37,286 INFO L226 Difference]: Without dead ends: 1526 [2018-10-23 20:49:37,293 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 [2018-10-23 20:49:37,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1526 states. [2018-10-23 20:49:37,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1526 to 1032. [2018-10-23 20:49:37,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1032 states. [2018-10-23 20:49:37,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1858 transitions. [2018-10-23 20:49:37,401 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1858 transitions. Word has length 38 [2018-10-23 20:49:37,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:49:37,402 INFO L481 AbstractCegarLoop]: Abstraction has 1032 states and 1858 transitions. [2018-10-23 20:49:37,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:49:37,402 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1858 transitions. [2018-10-23 20:49:37,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-23 20:49:37,406 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:49:37,407 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:49:37,407 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:49:37,407 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:49:37,408 INFO L82 PathProgramCache]: Analyzing trace with hash -2126674366, now seen corresponding path program 1 times [2018-10-23 20:49:37,408 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:49:37,408 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:49:37,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:49:37,409 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:49:37,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:49:37,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:49:37,608 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:49:37,609 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:49:37,609 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 20:49:37,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:49:37,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:49:37,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:49:37,612 INFO L87 Difference]: Start difference. First operand 1032 states and 1858 transitions. Second operand 4 states. [2018-10-23 20:49:47,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:49:47,805 INFO L93 Difference]: Finished difference Result 2924 states and 5354 transitions. [2018-10-23 20:49:47,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 20:49:47,805 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 106 [2018-10-23 20:49:47,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:49:47,816 INFO L225 Difference]: With dead ends: 2924 [2018-10-23 20:49:47,817 INFO L226 Difference]: Without dead ends: 1894 [2018-10-23 20:49:47,819 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:49:47,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2018-10-23 20:49:47,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 1894. [2018-10-23 20:49:47,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1894 states. [2018-10-23 20:49:47,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1894 states to 1894 states and 2838 transitions. [2018-10-23 20:49:47,869 INFO L78 Accepts]: Start accepts. Automaton has 1894 states and 2838 transitions. Word has length 106 [2018-10-23 20:49:47,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:49:47,870 INFO L481 AbstractCegarLoop]: Abstraction has 1894 states and 2838 transitions. [2018-10-23 20:49:47,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:49:47,870 INFO L276 IsEmpty]: Start isEmpty. Operand 1894 states and 2838 transitions. [2018-10-23 20:49:47,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-10-23 20:49:47,875 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:49:47,875 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:49:47,875 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:49:47,876 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:49:47,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1372525769, now seen corresponding path program 1 times [2018-10-23 20:49:47,876 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:49:47,876 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:49:47,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:49:47,877 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:49:47,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:49:47,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:49:48,312 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:49:48,312 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:49:48,313 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 [2018-10-23 20:49:48,331 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:49:48,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:49:48,393 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:49:48,620 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:49:48,649 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 20:49:48,650 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2018-10-23 20:49:48,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 20:49:48,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 20:49:48,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-23 20:49:48,651 INFO L87 Difference]: Start difference. First operand 1894 states and 2838 transitions. Second operand 6 states. [2018-10-23 20:50:07,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:50:07,122 INFO L93 Difference]: Finished difference Result 7665 states and 11401 transitions. [2018-10-23 20:50:07,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 20:50:07,123 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 109 [2018-10-23 20:50:07,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:50:07,143 INFO L225 Difference]: With dead ends: 7665 [2018-10-23 20:50:07,143 INFO L226 Difference]: Without dead ends: 3983 [2018-10-23 20:50:07,148 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-23 20:50:07,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3983 states. [2018-10-23 20:50:07,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3983 to 3981. [2018-10-23 20:50:07,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3981 states. [2018-10-23 20:50:07,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3981 states to 3981 states and 4944 transitions. [2018-10-23 20:50:07,219 INFO L78 Accepts]: Start accepts. Automaton has 3981 states and 4944 transitions. Word has length 109 [2018-10-23 20:50:07,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:50:07,219 INFO L481 AbstractCegarLoop]: Abstraction has 3981 states and 4944 transitions. [2018-10-23 20:50:07,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-23 20:50:07,220 INFO L276 IsEmpty]: Start isEmpty. Operand 3981 states and 4944 transitions. [2018-10-23 20:50:07,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2018-10-23 20:50:07,225 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:50:07,226 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:50:07,226 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:50:07,226 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:50:07,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1353365610, now seen corresponding path program 1 times [2018-10-23 20:50:07,227 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:50:07,227 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:50:07,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:50:07,228 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:50:07,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:50:07,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:50:07,494 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 272 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-10-23 20:50:07,494 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:50:07,495 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 20:50:07,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 20:50:07,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 20:50:07,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 20:50:07,496 INFO L87 Difference]: Start difference. First operand 3981 states and 4944 transitions. Second operand 3 states. [2018-10-23 20:50:10,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:50:10,530 INFO L93 Difference]: Finished difference Result 10084 states and 12888 transitions. [2018-10-23 20:50:10,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 20:50:10,531 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 259 [2018-10-23 20:50:10,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:50:10,563 INFO L225 Difference]: With dead ends: 10084 [2018-10-23 20:50:10,564 INFO L226 Difference]: Without dead ends: 6540 [2018-10-23 20:50:10,570 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 [2018-10-23 20:50:10,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6540 states. [2018-10-23 20:50:10,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6540 to 6540. [2018-10-23 20:50:10,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6540 states. [2018-10-23 20:50:10,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6540 states to 6540 states and 7960 transitions. [2018-10-23 20:50:10,687 INFO L78 Accepts]: Start accepts. Automaton has 6540 states and 7960 transitions. Word has length 259 [2018-10-23 20:50:10,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:50:10,688 INFO L481 AbstractCegarLoop]: Abstraction has 6540 states and 7960 transitions. [2018-10-23 20:50:10,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 20:50:10,688 INFO L276 IsEmpty]: Start isEmpty. Operand 6540 states and 7960 transitions. [2018-10-23 20:50:10,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2018-10-23 20:50:10,695 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:50:10,695 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-10-23 20:50:10,695 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:50:10,696 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:50:10,696 INFO L82 PathProgramCache]: Analyzing trace with hash -144031712, now seen corresponding path program 1 times [2018-10-23 20:50:10,696 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:50:10,696 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:50:10,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:50:10,697 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:50:10,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:50:10,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:50:11,258 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 355 proven. 83 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2018-10-23 20:50:11,259 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:50:11,259 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 [2018-10-23 20:50:11,266 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:50:11,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:50:11,377 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:50:11,886 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 355 proven. 83 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2018-10-23 20:50:11,924 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 20:50:11,924 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2018-10-23 20:50:11,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-23 20:50:11,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-23 20:50:11,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-10-23 20:50:11,926 INFO L87 Difference]: Start difference. First operand 6540 states and 7960 transitions. Second operand 7 states. [2018-10-23 20:50:26,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:50:26,268 INFO L93 Difference]: Finished difference Result 25892 states and 31137 transitions. [2018-10-23 20:50:26,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-23 20:50:26,269 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 364 [2018-10-23 20:50:26,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:50:26,333 INFO L225 Difference]: With dead ends: 25892 [2018-10-23 20:50:26,333 INFO L226 Difference]: Without dead ends: 17621 [2018-10-23 20:50:26,343 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2018-10-23 20:50:26,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17621 states. [2018-10-23 20:50:26,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17621 to 16751. [2018-10-23 20:50:26,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16751 states. [2018-10-23 20:50:26,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16751 states to 16751 states and 19005 transitions. [2018-10-23 20:50:26,634 INFO L78 Accepts]: Start accepts. Automaton has 16751 states and 19005 transitions. Word has length 364 [2018-10-23 20:50:26,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:50:26,634 INFO L481 AbstractCegarLoop]: Abstraction has 16751 states and 19005 transitions. [2018-10-23 20:50:26,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-23 20:50:26,635 INFO L276 IsEmpty]: Start isEmpty. Operand 16751 states and 19005 transitions. [2018-10-23 20:50:26,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2018-10-23 20:50:26,649 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:50:26,649 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-10-23 20:50:26,650 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:50:26,650 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:50:26,650 INFO L82 PathProgramCache]: Analyzing trace with hash -902309086, now seen corresponding path program 1 times [2018-10-23 20:50:26,650 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:50:26,651 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:50:26,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:50:26,652 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:50:26,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:50:26,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:50:27,067 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 143 proven. 0 refuted. 0 times theorem prover too weak. 511 trivial. 0 not checked. [2018-10-23 20:50:27,067 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:50:27,068 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 20:50:27,068 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 20:50:27,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 20:50:27,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 20:50:27,069 INFO L87 Difference]: Start difference. First operand 16751 states and 19005 transitions. Second operand 3 states. [2018-10-23 20:50:30,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:50:30,601 INFO L93 Difference]: Finished difference Result 39897 states and 45256 transitions. [2018-10-23 20:50:30,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 20:50:30,602 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 470 [2018-10-23 20:50:30,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:50:30,650 INFO L225 Difference]: With dead ends: 39897 [2018-10-23 20:50:30,651 INFO L226 Difference]: Without dead ends: 23147 [2018-10-23 20:50:30,670 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 [2018-10-23 20:50:30,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23147 states. [2018-10-23 20:50:30,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23147 to 17590. [2018-10-23 20:50:30,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17590 states. [2018-10-23 20:50:30,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17590 states to 17590 states and 19880 transitions. [2018-10-23 20:50:30,943 INFO L78 Accepts]: Start accepts. Automaton has 17590 states and 19880 transitions. Word has length 470 [2018-10-23 20:50:30,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:50:30,944 INFO L481 AbstractCegarLoop]: Abstraction has 17590 states and 19880 transitions. [2018-10-23 20:50:30,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 20:50:30,945 INFO L276 IsEmpty]: Start isEmpty. Operand 17590 states and 19880 transitions. [2018-10-23 20:50:30,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 594 [2018-10-23 20:50:30,968 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:50:30,969 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:50:30,969 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:50:30,969 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:50:30,969 INFO L82 PathProgramCache]: Analyzing trace with hash 532838612, now seen corresponding path program 1 times [2018-10-23 20:50:30,970 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:50:30,970 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:50:30,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:50:30,971 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:50:30,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:50:31,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:50:31,974 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 419 proven. 83 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2018-10-23 20:50:31,974 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:50:31,974 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 [2018-10-23 20:50:31,985 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:50:32,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:50:32,160 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:50:32,618 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 419 proven. 83 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2018-10-23 20:50:32,655 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 20:50:32,655 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 8 [2018-10-23 20:50:32,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-23 20:50:32,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-23 20:50:32,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-10-23 20:50:32,657 INFO L87 Difference]: Start difference. First operand 17590 states and 19880 transitions. Second operand 9 states. [2018-10-23 20:50:43,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:50:43,204 INFO L93 Difference]: Finished difference Result 36886 states and 41558 transitions. [2018-10-23 20:50:43,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 20:50:43,204 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 593 [2018-10-23 20:50:43,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:50:43,244 INFO L225 Difference]: With dead ends: 36886 [2018-10-23 20:50:43,244 INFO L226 Difference]: Without dead ends: 19724 [2018-10-23 20:50:43,263 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 600 GetRequests, 591 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2018-10-23 20:50:43,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19724 states. [2018-10-23 20:50:43,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19724 to 19720. [2018-10-23 20:50:43,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19720 states. [2018-10-23 20:50:43,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19720 states to 19720 states and 22076 transitions. [2018-10-23 20:50:43,489 INFO L78 Accepts]: Start accepts. Automaton has 19720 states and 22076 transitions. Word has length 593 [2018-10-23 20:50:43,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:50:43,490 INFO L481 AbstractCegarLoop]: Abstraction has 19720 states and 22076 transitions. [2018-10-23 20:50:43,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-23 20:50:43,490 INFO L276 IsEmpty]: Start isEmpty. Operand 19720 states and 22076 transitions. [2018-10-23 20:50:43,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 670 [2018-10-23 20:50:43,520 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:50:43,521 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, 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, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:50:43,521 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:50:43,522 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:50:43,522 INFO L82 PathProgramCache]: Analyzing trace with hash -750196100, now seen corresponding path program 1 times [2018-10-23 20:50:43,522 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:50:43,522 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:50:43,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:50:43,523 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:50:43,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:50:43,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:50:44,816 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 488 proven. 389 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2018-10-23 20:50:44,816 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:50:44,816 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 [2018-10-23 20:50:44,823 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:50:44,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:50:44,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:50:45,260 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 20 [2018-10-23 20:50:45,906 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 179 proven. 0 refuted. 0 times theorem prover too weak. 817 trivial. 0 not checked. [2018-10-23 20:50:45,932 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 20:50:45,932 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2018-10-23 20:50:45,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-23 20:50:45,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-23 20:50:45,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-10-23 20:50:45,934 INFO L87 Difference]: Start difference. First operand 19720 states and 22076 transitions. Second operand 7 states. [2018-10-23 20:51:09,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:51:09,586 INFO L93 Difference]: Finished difference Result 67614 states and 76473 transitions. [2018-10-23 20:51:09,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-23 20:51:09,591 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 669 [2018-10-23 20:51:09,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:51:09,633 INFO L225 Difference]: With dead ends: 67614 [2018-10-23 20:51:09,633 INFO L226 Difference]: Without dead ends: 48317 [2018-10-23 20:51:09,649 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 683 GetRequests, 672 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2018-10-23 20:51:09,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48317 states. [2018-10-23 20:51:10,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48317 to 38477. [2018-10-23 20:51:10,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38477 states. [2018-10-23 20:51:10,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38477 states to 38477 states and 42025 transitions. [2018-10-23 20:51:10,160 INFO L78 Accepts]: Start accepts. Automaton has 38477 states and 42025 transitions. Word has length 669 [2018-10-23 20:51:10,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:51:10,161 INFO L481 AbstractCegarLoop]: Abstraction has 38477 states and 42025 transitions. [2018-10-23 20:51:10,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-23 20:51:10,162 INFO L276 IsEmpty]: Start isEmpty. Operand 38477 states and 42025 transitions. [2018-10-23 20:51:10,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 768 [2018-10-23 20:51:10,216 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:51:10,217 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-23 20:51:10,217 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:51:10,217 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:51:10,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1221331625, now seen corresponding path program 1 times [2018-10-23 20:51:10,218 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:51:10,218 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:51:10,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:51:10,219 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:51:10,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:51:10,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:51:10,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1581 backedges. 706 proven. 0 refuted. 0 times theorem prover too weak. 875 trivial. 0 not checked. [2018-10-23 20:51:10,921 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:51:10,921 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 20:51:10,922 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 20:51:10,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 20:51:10,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 20:51:10,923 INFO L87 Difference]: Start difference. First operand 38477 states and 42025 transitions. Second operand 3 states. [2018-10-23 20:51:15,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:51:15,814 INFO L93 Difference]: Finished difference Result 94016 states and 102986 transitions. [2018-10-23 20:51:15,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 20:51:15,814 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 767 [2018-10-23 20:51:15,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:51:15,878 INFO L225 Difference]: With dead ends: 94016 [2018-10-23 20:51:15,879 INFO L226 Difference]: Without dead ends: 57671 [2018-10-23 20:51:15,904 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 20:51:15,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57671 states. [2018-10-23 20:51:16,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57671 to 51262. [2018-10-23 20:51:16,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51262 states. [2018-10-23 20:51:16,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51262 states to 51262 states and 56262 transitions. [2018-10-23 20:51:16,549 INFO L78 Accepts]: Start accepts. Automaton has 51262 states and 56262 transitions. Word has length 767 [2018-10-23 20:51:16,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:51:16,550 INFO L481 AbstractCegarLoop]: Abstraction has 51262 states and 56262 transitions. [2018-10-23 20:51:16,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 20:51:16,550 INFO L276 IsEmpty]: Start isEmpty. Operand 51262 states and 56262 transitions. [2018-10-23 20:51:16,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 810 [2018-10-23 20:51:16,600 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:51:16,601 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, 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, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:51:16,601 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:51:16,602 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:51:16,602 INFO L82 PathProgramCache]: Analyzing trace with hash -175703914, now seen corresponding path program 1 times [2018-10-23 20:51:16,602 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:51:16,602 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:51:16,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:51:16,603 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:51:16,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:51:16,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:51:17,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1018 backedges. 546 proven. 0 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2018-10-23 20:51:17,670 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:51:17,671 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-23 20:51:17,671 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 20:51:17,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 20:51:17,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:51:17,672 INFO L87 Difference]: Start difference. First operand 51262 states and 56262 transitions. Second operand 5 states. [2018-10-23 20:51:24,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:51:24,366 INFO L93 Difference]: Finished difference Result 111059 states and 122587 transitions. [2018-10-23 20:51:24,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 20:51:24,366 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 809 [2018-10-23 20:51:24,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:51:24,444 INFO L225 Difference]: With dead ends: 111059 [2018-10-23 20:51:24,444 INFO L226 Difference]: Without dead ends: 66199 [2018-10-23 20:51:24,474 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:51:24,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66199 states. [2018-10-23 20:51:25,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66199 to 55965. [2018-10-23 20:51:25,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55965 states. [2018-10-23 20:51:25,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55965 states to 55965 states and 61391 transitions. [2018-10-23 20:51:25,130 INFO L78 Accepts]: Start accepts. Automaton has 55965 states and 61391 transitions. Word has length 809 [2018-10-23 20:51:25,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:51:25,131 INFO L481 AbstractCegarLoop]: Abstraction has 55965 states and 61391 transitions. [2018-10-23 20:51:25,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 20:51:25,131 INFO L276 IsEmpty]: Start isEmpty. Operand 55965 states and 61391 transitions. [2018-10-23 20:51:25,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 815 [2018-10-23 20:51:25,164 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:51:25,165 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:51:25,165 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:51:25,166 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:51:25,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1566453425, now seen corresponding path program 1 times [2018-10-23 20:51:25,166 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:51:25,166 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:51:25,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:51:25,167 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:51:25,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:51:25,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:51:25,931 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 5 [2018-10-23 20:51:26,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 515 proven. 36 refuted. 0 times theorem prover too weak. 487 trivial. 0 not checked. [2018-10-23 20:51:26,500 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:51:26,500 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 [2018-10-23 20:51:26,507 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:51:26,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:51:26,720 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:51:27,043 WARN L179 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 16 [2018-10-23 20:51:28,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 179 proven. 0 refuted. 0 times theorem prover too weak. 859 trivial. 0 not checked. [2018-10-23 20:51:28,063 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 20:51:28,064 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2018-10-23 20:51:28,065 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-23 20:51:28,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-23 20:51:28,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-10-23 20:51:28,066 INFO L87 Difference]: Start difference. First operand 55965 states and 61391 transitions. Second operand 7 states. [2018-10-23 20:51:58,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:51:58,430 INFO L93 Difference]: Finished difference Result 139239 states and 152584 transitions. [2018-10-23 20:51:58,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-23 20:51:58,430 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 814 [2018-10-23 20:51:58,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:51:58,505 INFO L225 Difference]: With dead ends: 139239 [2018-10-23 20:51:58,505 INFO L226 Difference]: Without dead ends: 83275 [2018-10-23 20:51:58,530 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 830 GetRequests, 819 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2018-10-23 20:51:58,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83275 states. [2018-10-23 20:51:59,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83275 to 61930. [2018-10-23 20:51:59,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61930 states. [2018-10-23 20:51:59,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61930 states to 61930 states and 66708 transitions. [2018-10-23 20:51:59,323 INFO L78 Accepts]: Start accepts. Automaton has 61930 states and 66708 transitions. Word has length 814 [2018-10-23 20:51:59,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:51:59,323 INFO L481 AbstractCegarLoop]: Abstraction has 61930 states and 66708 transitions. [2018-10-23 20:51:59,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-23 20:51:59,323 INFO L276 IsEmpty]: Start isEmpty. Operand 61930 states and 66708 transitions. [2018-10-23 20:51:59,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 958 [2018-10-23 20:51:59,367 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:51:59,367 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-23 20:51:59,368 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:51:59,368 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:51:59,368 INFO L82 PathProgramCache]: Analyzing trace with hash 560682652, now seen corresponding path program 1 times [2018-10-23 20:51:59,368 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:51:59,369 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:51:59,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:51:59,369 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:51:59,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:51:59,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:52:00,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1732 backedges. 943 proven. 0 refuted. 0 times theorem prover too weak. 789 trivial. 0 not checked. [2018-10-23 20:52:00,380 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:52:00,380 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-23 20:52:00,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 20:52:00,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 20:52:00,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 20:52:00,386 INFO L87 Difference]: Start difference. First operand 61930 states and 66708 transitions. Second operand 3 states. [2018-10-23 20:52:02,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:52:02,564 INFO L93 Difference]: Finished difference Result 116168 states and 125218 transitions. [2018-10-23 20:52:02,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 20:52:02,565 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 957 [2018-10-23 20:52:02,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:52:02,618 INFO L225 Difference]: With dead ends: 116168 [2018-10-23 20:52:02,618 INFO L226 Difference]: Without dead ends: 58929 [2018-10-23 20:52:02,636 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 [2018-10-23 20:52:02,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58929 states. [2018-10-23 20:52:03,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58929 to 54235. [2018-10-23 20:52:03,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54235 states. [2018-10-23 20:52:03,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54235 states to 54235 states and 58462 transitions. [2018-10-23 20:52:03,101 INFO L78 Accepts]: Start accepts. Automaton has 54235 states and 58462 transitions. Word has length 957 [2018-10-23 20:52:03,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:52:03,101 INFO L481 AbstractCegarLoop]: Abstraction has 54235 states and 58462 transitions. [2018-10-23 20:52:03,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 20:52:03,101 INFO L276 IsEmpty]: Start isEmpty. Operand 54235 states and 58462 transitions. [2018-10-23 20:52:03,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 958 [2018-10-23 20:52:03,138 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:52:03,139 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-23 20:52:03,139 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:52:03,139 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:52:03,139 INFO L82 PathProgramCache]: Analyzing trace with hash -393890786, now seen corresponding path program 1 times [2018-10-23 20:52:03,139 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:52:03,140 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:52:03,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:52:03,140 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:52:03,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:52:03,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:52:03,924 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 9 [2018-10-23 20:52:04,166 WARN L179 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 10 [2018-10-23 20:52:04,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1732 backedges. 1178 proven. 0 refuted. 0 times theorem prover too weak. 554 trivial. 0 not checked. [2018-10-23 20:52:04,851 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:52:04,851 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-23 20:52:04,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 20:52:04,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 20:52:04,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:52:04,852 INFO L87 Difference]: Start difference. First operand 54235 states and 58462 transitions. Second operand 5 states. [2018-10-23 20:52:16,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:52:16,342 INFO L93 Difference]: Finished difference Result 113588 states and 122440 transitions. [2018-10-23 20:52:16,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-23 20:52:16,342 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 957 [2018-10-23 20:52:16,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:52:16,400 INFO L225 Difference]: With dead ends: 113588 [2018-10-23 20:52:16,401 INFO L226 Difference]: Without dead ends: 64899 [2018-10-23 20:52:16,427 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-23 20:52:16,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64899 states. [2018-10-23 20:52:16,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64899 to 59349. [2018-10-23 20:52:16,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59349 states. [2018-10-23 20:52:17,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59349 states to 59349 states and 63672 transitions. [2018-10-23 20:52:17,001 INFO L78 Accepts]: Start accepts. Automaton has 59349 states and 63672 transitions. Word has length 957 [2018-10-23 20:52:17,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:52:17,001 INFO L481 AbstractCegarLoop]: Abstraction has 59349 states and 63672 transitions. [2018-10-23 20:52:17,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 20:52:17,001 INFO L276 IsEmpty]: Start isEmpty. Operand 59349 states and 63672 transitions. [2018-10-23 20:52:17,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1112 [2018-10-23 20:52:17,048 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:52:17,049 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 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, 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, 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] [2018-10-23 20:52:17,049 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:52:17,049 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:52:17,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1770551083, now seen corresponding path program 1 times [2018-10-23 20:52:17,050 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:52:17,050 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:52:17,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:52:17,051 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:52:17,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:52:17,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:52:18,021 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 3 [2018-10-23 20:52:18,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2204 backedges. 1522 proven. 0 refuted. 0 times theorem prover too weak. 682 trivial. 0 not checked. [2018-10-23 20:52:18,976 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:52:18,976 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-23 20:52:18,977 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 20:52:18,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 20:52:18,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-23 20:52:18,977 INFO L87 Difference]: Start difference. First operand 59349 states and 63672 transitions. Second operand 6 states. [2018-10-23 20:52:26,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:52:26,506 INFO L93 Difference]: Finished difference Result 129793 states and 139807 transitions. [2018-10-23 20:52:26,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-23 20:52:26,506 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 1111 [2018-10-23 20:52:26,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:52:26,578 INFO L225 Difference]: With dead ends: 129793 [2018-10-23 20:52:26,578 INFO L226 Difference]: Without dead ends: 75564 [2018-10-23 20:52:26,609 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-23 20:52:26,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75564 states. [2018-10-23 20:52:27,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75564 to 55084. [2018-10-23 20:52:27,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55084 states. [2018-10-23 20:52:27,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55084 states to 55084 states and 58782 transitions. [2018-10-23 20:52:27,644 INFO L78 Accepts]: Start accepts. Automaton has 55084 states and 58782 transitions. Word has length 1111 [2018-10-23 20:52:27,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:52:27,645 INFO L481 AbstractCegarLoop]: Abstraction has 55084 states and 58782 transitions. [2018-10-23 20:52:27,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-23 20:52:27,645 INFO L276 IsEmpty]: Start isEmpty. Operand 55084 states and 58782 transitions. [2018-10-23 20:52:27,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1254 [2018-10-23 20:52:27,685 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:52:27,686 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-10-23 20:52:27,686 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:52:27,686 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:52:27,687 INFO L82 PathProgramCache]: Analyzing trace with hash -88722940, now seen corresponding path program 1 times [2018-10-23 20:52:27,687 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:52:27,687 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:52:27,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:52:27,688 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:52:27,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:52:27,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:52:28,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3188 backedges. 1768 proven. 0 refuted. 0 times theorem prover too weak. 1420 trivial. 0 not checked. [2018-10-23 20:52:28,750 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:52:28,751 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 20:52:28,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 20:52:28,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 20:52:28,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 20:52:28,752 INFO L87 Difference]: Start difference. First operand 55084 states and 58782 transitions. Second operand 3 states. [2018-10-23 20:52:31,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:52:31,302 INFO L93 Difference]: Finished difference Result 104194 states and 111285 transitions. [2018-10-23 20:52:31,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 20:52:31,302 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1253 [2018-10-23 20:52:31,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:52:31,358 INFO L225 Difference]: With dead ends: 104194 [2018-10-23 20:52:31,359 INFO L226 Difference]: Without dead ends: 55934 [2018-10-23 20:52:31,387 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 [2018-10-23 20:52:31,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55934 states. [2018-10-23 20:52:31,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55934 to 54230. [2018-10-23 20:52:31,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54230 states. [2018-10-23 20:52:31,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54230 states to 54230 states and 57633 transitions. [2018-10-23 20:52:31,892 INFO L78 Accepts]: Start accepts. Automaton has 54230 states and 57633 transitions. Word has length 1253 [2018-10-23 20:52:31,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:52:31,893 INFO L481 AbstractCegarLoop]: Abstraction has 54230 states and 57633 transitions. [2018-10-23 20:52:31,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 20:52:31,893 INFO L276 IsEmpty]: Start isEmpty. Operand 54230 states and 57633 transitions. [2018-10-23 20:52:31,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1298 [2018-10-23 20:52:31,933 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:52:31,934 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 6, 6, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-23 20:52:31,934 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:52:31,934 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:52:31,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1221499625, now seen corresponding path program 1 times [2018-10-23 20:52:31,935 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:52:31,935 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:52:31,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:52:31,936 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:52:31,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:52:32,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:52:34,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2131 backedges. 1345 proven. 346 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2018-10-23 20:52:34,591 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:52:34,592 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 [2018-10-23 20:52:34,600 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:52:34,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:52:34,942 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:52:36,082 WARN L854 $PredicateComparison]: unable to prove that (or (exists ((v_prenex_17 Int)) (let ((.cse0 (mod v_prenex_17 299909))) (and (= .cse0 0) (<= .cse0 (+ c_~a14~0 300091)) (<= (+ v_prenex_17 182) 0)))) (exists ((v_prenex_16 Int)) (and (<= (+ v_prenex_16 182) 0) (<= 0 v_prenex_16) (<= (mod v_prenex_16 299909) (+ c_~a14~0 300091)))) (exists ((v_~a14~0_1227 Int)) (let ((.cse1 (mod v_~a14~0_1227 299909))) (and (not (= .cse1 0)) (<= .cse1 (+ c_~a14~0 600000)) (< v_~a14~0_1227 0) (<= (+ v_~a14~0_1227 182) 0))))) is different from true [2018-10-23 20:52:36,707 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 16 [2018-10-23 20:52:41,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2131 backedges. 991 proven. 108 refuted. 0 times theorem prover too weak. 531 trivial. 501 not checked. [2018-10-23 20:52:41,356 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 20:52:41,356 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2018-10-23 20:52:41,358 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-23 20:52:41,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-23 20:52:41,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=43, Unknown=1, NotChecked=12, Total=72 [2018-10-23 20:52:41,358 INFO L87 Difference]: Start difference. First operand 54230 states and 57633 transitions. Second operand 9 states. [2018-10-23 20:53:04,938 WARN L179 SmtUtils]: Spent 5.38 s on a formula simplification. DAG size of input: 41 DAG size of output: 22 Received shutdown request... [2018-10-23 20:53:14,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-23 20:53:14,240 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-23 20:53:14,246 WARN L205 ceAbstractionStarter]: Timeout [2018-10-23 20:53:14,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 08:53:14 BoogieIcfgContainer [2018-10-23 20:53:14,246 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-23 20:53:14,247 INFO L168 Benchmark]: Toolchain (without parser) took 238695.55 ms. Allocated memory was 1.5 GB in the beginning and 4.0 GB in the end (delta: 2.5 GB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -946.0 MB). Peak memory consumption was 1.5 GB. Max. memory is 7.1 GB. [2018-10-23 20:53:14,248 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-23 20:53:14,249 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1553.25 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 126.8 MB). Peak memory consumption was 126.8 MB. Max. memory is 7.1 GB. [2018-10-23 20:53:14,250 INFO L168 Benchmark]: Boogie Procedure Inliner took 546.07 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 777.0 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -900.2 MB). Peak memory consumption was 56.1 MB. Max. memory is 7.1 GB. [2018-10-23 20:53:14,251 INFO L168 Benchmark]: Boogie Preprocessor took 286.97 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 42.6 MB). Peak memory consumption was 42.6 MB. Max. memory is 7.1 GB. [2018-10-23 20:53:14,251 INFO L168 Benchmark]: RCFGBuilder took 8990.25 ms. Allocated memory is still 2.3 GB. Free memory was 2.1 GB in the beginning and 1.7 GB in the end (delta: 469.8 MB). Peak memory consumption was 469.8 MB. Max. memory is 7.1 GB. [2018-10-23 20:53:14,252 INFO L168 Benchmark]: TraceAbstraction took 227313.92 ms. Allocated memory was 2.3 GB in the beginning and 4.0 GB in the end (delta: 1.7 GB). Free memory was 1.7 GB in the beginning and 2.3 GB in the end (delta: -685.1 MB). Peak memory consumption was 988.4 MB. Max. memory is 7.1 GB. [2018-10-23 20:53:14,257 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 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1553.25 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 126.8 MB). Peak memory consumption was 126.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 546.07 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 777.0 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -900.2 MB). Peak memory consumption was 56.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 286.97 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 42.6 MB). Peak memory consumption was 42.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 8990.25 ms. Allocated memory is still 2.3 GB. Free memory was 2.1 GB in the beginning and 1.7 GB in the end (delta: 469.8 MB). Peak memory consumption was 469.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 227313.92 ms. Allocated memory was 2.3 GB in the beginning and 4.0 GB in the end (delta: 1.7 GB). Free memory was 1.7 GB in the beginning and 2.3 GB in the end (delta: -685.1 MB). Peak memory consumption was 988.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 119]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 119). Cancelled while BasicCegarLoop was constructing difference of abstraction (54230states) and FLOYD_HOARE automaton (currently 13 states, 9 states before enhancement),while ReachableStatesComputation was computing reachable states (37448 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 591 locations, 1 error locations. TIMEOUT Result, 227.2s OverallTime, 16 OverallIterations, 9 TraceHistogramMax, 193.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 4886 SDtfs, 22322 SDslu, 2728 SDs, 0 SdLazy, 66618 SolverSat, 7205 SolverUnsat, 14 SolverUnknown, 0 SolverNotchecked, 164.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3947 GetRequests, 3869 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 14.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61930occurred in iteration=11, 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: 6.3s AutomataMinimizationTime, 15 MinimizatonAttempts, 87183 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 17.9s InterpolantComputationTime, 14419 NumberOfCodeBlocks, 14419 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 14397 ConstructedInterpolants, 309 QuantifiedInterpolants, 49547387 SizeOfPredicates, 5 NumberOfNonLiveVariables, 4712 ConjunctsInSsa, 23 ConjunctsInUnsatCore, 22 InterpolantComputations, 13 PerfectInterpolantSequences, 21575/23322 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown