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/Problem15_label42_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 16:36:41,659 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 16:36:41,661 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 16:36:41,673 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 16:36:41,673 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 16:36:41,674 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 16:36:41,676 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 16:36:41,677 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 16:36:41,679 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 16:36:41,680 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 16:36:41,681 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 16:36:41,681 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 16:36:41,682 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 16:36:41,683 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 16:36:41,684 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 16:36:41,685 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 16:36:41,686 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 16:36:41,688 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 16:36:41,690 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 16:36:41,691 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 16:36:41,693 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 16:36:41,696 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 16:36:41,701 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 16:36:41,711 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-24 16:36:41,712 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-24 16:36:41,713 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-24 16:36:41,714 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-24 16:36:41,714 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-24 16:36:41,734 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 16:36:41,735 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 16:36:41,736 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 16:36:41,736 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 16:36:41,736 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 16:36:41,737 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 16:36:41,737 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 16:36:41,737 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 16:36:41,737 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 16:36:41,737 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 16:36:41,738 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 16:36:41,738 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 16:36:41,738 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 16:36:41,738 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 16:36:41,738 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 16:36:41,739 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 16:36:41,739 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 16:36:41,739 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 16:36:41,739 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 16:36:41,739 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 16:36:41,740 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 16:36:41,740 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 16:36:41,740 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 16:36:41,740 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 16:36:41,740 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 16:36:41,740 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 16:36:41,741 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 16:36:41,741 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 16:36:41,797 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 16:36:41,815 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 16:36:41,820 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 16:36:41,822 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 16:36:41,822 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 16:36:41,823 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label42_true-unreach-call.c [2018-10-24 16:36:41,877 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/0e9138f82/c98a2c7f18ff43f3bb7ddc0e347208ae/FLAG982443bd6 [2018-10-24 16:36:42,601 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 16:36:42,602 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label42_true-unreach-call.c [2018-10-24 16:36:42,624 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/0e9138f82/c98a2c7f18ff43f3bb7ddc0e347208ae/FLAG982443bd6 [2018-10-24 16:36:42,646 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/0e9138f82/c98a2c7f18ff43f3bb7ddc0e347208ae [2018-10-24 16:36:42,659 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 16:36:42,660 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 16:36:42,661 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 16:36:42,662 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 16:36:42,666 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 16:36:42,667 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:36:42" (1/1) ... [2018-10-24 16:36:42,670 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@309cd1a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:36:42, skipping insertion in model container [2018-10-24 16:36:42,670 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:36:42" (1/1) ... [2018-10-24 16:36:42,682 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 16:36:42,780 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 16:36:43,632 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 16:36:43,637 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 16:36:43,930 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 16:36:43,953 INFO L193 MainTranslator]: Completed translation [2018-10-24 16:36:43,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:36:43 WrapperNode [2018-10-24 16:36:43,953 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 16:36:43,954 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 16:36:43,955 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 16:36:43,956 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 16:36:43,966 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:36:43" (1/1) ... [2018-10-24 16:36:44,017 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:36:43" (1/1) ... [2018-10-24 16:36:44,374 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 16:36:44,375 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 16:36:44,375 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 16:36:44,375 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 16:36:44,388 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:36:43" (1/1) ... [2018-10-24 16:36:44,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:36:43" (1/1) ... [2018-10-24 16:36:44,409 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:36:43" (1/1) ... [2018-10-24 16:36:44,410 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:36:43" (1/1) ... [2018-10-24 16:36:44,507 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:36:43" (1/1) ... [2018-10-24 16:36:44,540 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:36:43" (1/1) ... [2018-10-24 16:36:44,592 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:36:43" (1/1) ... [2018-10-24 16:36:44,651 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 16:36:44,652 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 16:36:44,652 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 16:36:44,652 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 16:36:44,654 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:36:43" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 16:36:44,725 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-24 16:36:44,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 16:36:44,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 16:36:52,623 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 16:36:52,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:36:52 BoogieIcfgContainer [2018-10-24 16:36:52,625 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 16:36:52,626 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 16:36:52,626 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 16:36:52,629 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 16:36:52,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 04:36:42" (1/3) ... [2018-10-24 16:36:52,630 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a25a196 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:36:52, skipping insertion in model container [2018-10-24 16:36:52,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:36:43" (2/3) ... [2018-10-24 16:36:52,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a25a196 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:36:52, skipping insertion in model container [2018-10-24 16:36:52,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:36:52" (3/3) ... [2018-10-24 16:36:52,633 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label42_true-unreach-call.c [2018-10-24 16:36:52,644 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 16:36:52,653 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 16:36:52,672 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 16:36:52,716 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 16:36:52,717 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 16:36:52,717 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 16:36:52,717 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 16:36:52,717 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 16:36:52,717 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 16:36:52,718 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 16:36:52,718 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 16:36:52,718 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 16:36:52,747 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states. [2018-10-24 16:36:52,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-24 16:36:52,757 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:36:52,758 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:36:52,761 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:36:52,767 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:36:52,768 INFO L82 PathProgramCache]: Analyzing trace with hash 84973194, now seen corresponding path program 1 times [2018-10-24 16:36:52,770 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:36:52,771 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:36:52,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:36:52,824 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:36:52,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:36:52,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:36:53,249 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 5 [2018-10-24 16:36:53,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:36:53,273 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:36:53,273 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:36:53,278 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:36:53,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:36:53,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:36:53,297 INFO L87 Difference]: Start difference. First operand 425 states. Second operand 4 states. [2018-10-24 16:37:03,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:37:03,098 INFO L93 Difference]: Finished difference Result 1461 states and 2710 transitions. [2018-10-24 16:37:03,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:37:03,101 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2018-10-24 16:37:03,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:37:03,131 INFO L225 Difference]: With dead ends: 1461 [2018-10-24 16:37:03,131 INFO L226 Difference]: Without dead ends: 1029 [2018-10-24 16:37:03,137 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:37:03,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2018-10-24 16:37:03,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 724. [2018-10-24 16:37:03,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 724 states. [2018-10-24 16:37:03,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 1102 transitions. [2018-10-24 16:37:03,242 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 1102 transitions. Word has length 47 [2018-10-24 16:37:03,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:37:03,242 INFO L481 AbstractCegarLoop]: Abstraction has 724 states and 1102 transitions. [2018-10-24 16:37:03,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:37:03,243 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 1102 transitions. [2018-10-24 16:37:03,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-10-24 16:37:03,249 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:37:03,250 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:37:03,253 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:37:03,253 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:37:03,253 INFO L82 PathProgramCache]: Analyzing trace with hash 882867118, now seen corresponding path program 1 times [2018-10-24 16:37:03,254 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:37:03,254 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:37:03,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:37:03,256 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:37:03,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:37:03,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:37:03,873 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 9 [2018-10-24 16:37:03,909 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:37:03,909 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:37:03,909 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:37:03,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:37:03,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:37:03,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:37:03,912 INFO L87 Difference]: Start difference. First operand 724 states and 1102 transitions. Second operand 5 states. [2018-10-24 16:37:15,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:37:15,415 INFO L93 Difference]: Finished difference Result 2371 states and 3547 transitions. [2018-10-24 16:37:15,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:37:15,416 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 113 [2018-10-24 16:37:15,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:37:15,426 INFO L225 Difference]: With dead ends: 2371 [2018-10-24 16:37:15,426 INFO L226 Difference]: Without dead ends: 1649 [2018-10-24 16:37:15,431 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:37:15,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1649 states. [2018-10-24 16:37:15,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1649 to 1341. [2018-10-24 16:37:15,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1341 states. [2018-10-24 16:37:15,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 1885 transitions. [2018-10-24 16:37:15,483 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 1885 transitions. Word has length 113 [2018-10-24 16:37:15,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:37:15,484 INFO L481 AbstractCegarLoop]: Abstraction has 1341 states and 1885 transitions. [2018-10-24 16:37:15,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:37:15,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 1885 transitions. [2018-10-24 16:37:15,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-24 16:37:15,494 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:37:15,494 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:37:15,495 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:37:15,495 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:37:15,495 INFO L82 PathProgramCache]: Analyzing trace with hash -643709568, now seen corresponding path program 1 times [2018-10-24 16:37:15,495 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:37:15,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:37:15,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:37:15,497 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:37:15,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:37:15,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:37:15,738 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:37:15,739 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:37:15,739 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:37:15,740 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:37:15,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:37:15,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:37:15,741 INFO L87 Difference]: Start difference. First operand 1341 states and 1885 transitions. Second operand 4 states. [2018-10-24 16:37:20,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:37:20,255 INFO L93 Difference]: Finished difference Result 4794 states and 6886 transitions. [2018-10-24 16:37:20,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:37:20,264 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 118 [2018-10-24 16:37:20,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:37:20,284 INFO L225 Difference]: With dead ends: 4794 [2018-10-24 16:37:20,284 INFO L226 Difference]: Without dead ends: 3455 [2018-10-24 16:37:20,287 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:37:20,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3455 states. [2018-10-24 16:37:20,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3455 to 3450. [2018-10-24 16:37:20,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3450 states. [2018-10-24 16:37:20,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3450 states to 3450 states and 4522 transitions. [2018-10-24 16:37:20,363 INFO L78 Accepts]: Start accepts. Automaton has 3450 states and 4522 transitions. Word has length 118 [2018-10-24 16:37:20,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:37:20,364 INFO L481 AbstractCegarLoop]: Abstraction has 3450 states and 4522 transitions. [2018-10-24 16:37:20,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:37:20,364 INFO L276 IsEmpty]: Start isEmpty. Operand 3450 states and 4522 transitions. [2018-10-24 16:37:20,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-10-24 16:37:20,370 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:37:20,370 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:37:20,371 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:37:20,371 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:37:20,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1846719779, now seen corresponding path program 1 times [2018-10-24 16:37:20,371 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:37:20,371 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:37:20,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:37:20,374 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:37:20,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:37:20,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:37:20,775 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 5 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:37:20,776 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:37:20,776 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) [2018-10-24 16:37:20,791 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:37:20,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:37:20,864 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:37:21,207 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 9 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:37:21,244 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:37:21,245 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2018-10-24 16:37:21,246 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-24 16:37:21,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-24 16:37:21,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-10-24 16:37:21,247 INFO L87 Difference]: Start difference. First operand 3450 states and 4522 transitions. Second operand 8 states. [2018-10-24 16:37:21,474 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-10-24 16:37:22,643 WARN L179 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-10-24 16:37:42,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:37:42,057 INFO L93 Difference]: Finished difference Result 17786 states and 25311 transitions. [2018-10-24 16:37:42,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-24 16:37:42,058 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 139 [2018-10-24 16:37:42,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:37:42,119 INFO L225 Difference]: With dead ends: 17786 [2018-10-24 16:37:42,119 INFO L226 Difference]: Without dead ends: 13735 [2018-10-24 16:37:42,126 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2018-10-24 16:37:42,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13735 states. [2018-10-24 16:37:42,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13735 to 13688. [2018-10-24 16:37:42,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13688 states. [2018-10-24 16:37:42,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13688 states to 13688 states and 17843 transitions. [2018-10-24 16:37:42,393 INFO L78 Accepts]: Start accepts. Automaton has 13688 states and 17843 transitions. Word has length 139 [2018-10-24 16:37:42,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:37:42,394 INFO L481 AbstractCegarLoop]: Abstraction has 13688 states and 17843 transitions. [2018-10-24 16:37:42,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-24 16:37:42,394 INFO L276 IsEmpty]: Start isEmpty. Operand 13688 states and 17843 transitions. [2018-10-24 16:37:42,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2018-10-24 16:37:42,399 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:37:42,400 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 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] [2018-10-24 16:37:42,400 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:37:42,400 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:37:42,401 INFO L82 PathProgramCache]: Analyzing trace with hash -229157372, now seen corresponding path program 1 times [2018-10-24 16:37:42,401 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:37:42,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:37:42,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:37:42,402 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:37:42,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:37:42,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:37:42,902 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 89 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2018-10-24 16:37:42,902 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:37:42,902 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:37:42,918 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:37:43,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:37:43,029 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:37:43,122 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 157 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:37:43,152 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:37:43,152 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2018-10-24 16:37:43,153 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:37:43,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:37:43,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:37:43,154 INFO L87 Difference]: Start difference. First operand 13688 states and 17843 transitions. Second operand 4 states. [2018-10-24 16:37:46,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:37:46,987 INFO L93 Difference]: Finished difference Result 44552 states and 58887 transitions. [2018-10-24 16:37:46,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:37:46,988 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 293 [2018-10-24 16:37:46,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:37:47,062 INFO L225 Difference]: With dead ends: 44552 [2018-10-24 16:37:47,063 INFO L226 Difference]: Without dead ends: 30564 [2018-10-24 16:37:47,086 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:37:47,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30564 states. [2018-10-24 16:37:47,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30564 to 19984. [2018-10-24 16:37:47,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19984 states. [2018-10-24 16:37:47,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19984 states to 19984 states and 24377 transitions. [2018-10-24 16:37:47,483 INFO L78 Accepts]: Start accepts. Automaton has 19984 states and 24377 transitions. Word has length 293 [2018-10-24 16:37:47,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:37:47,484 INFO L481 AbstractCegarLoop]: Abstraction has 19984 states and 24377 transitions. [2018-10-24 16:37:47,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:37:47,484 INFO L276 IsEmpty]: Start isEmpty. Operand 19984 states and 24377 transitions. [2018-10-24 16:37:47,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2018-10-24 16:37:47,502 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:37:47,503 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:37:47,503 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:37:47,503 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:37:47,504 INFO L82 PathProgramCache]: Analyzing trace with hash -439750956, now seen corresponding path program 1 times [2018-10-24 16:37:47,504 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:37:47,504 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:37:47,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:37:47,505 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:37:47,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:37:47,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:37:48,322 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 271 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-10-24 16:37:48,322 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:37:48,323 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:37:48,323 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:37:48,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:37:48,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:37:48,324 INFO L87 Difference]: Start difference. First operand 19984 states and 24377 transitions. Second operand 4 states. [2018-10-24 16:37:53,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:37:53,707 INFO L93 Difference]: Finished difference Result 46568 states and 57245 transitions. [2018-10-24 16:37:53,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:37:53,707 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 464 [2018-10-24 16:37:53,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:37:53,764 INFO L225 Difference]: With dead ends: 46568 [2018-10-24 16:37:53,765 INFO L226 Difference]: Without dead ends: 26886 [2018-10-24 16:37:53,786 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:37:53,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26886 states. [2018-10-24 16:37:54,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26886 to 24171. [2018-10-24 16:37:54,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24171 states. [2018-10-24 16:37:54,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24171 states to 24171 states and 28203 transitions. [2018-10-24 16:37:54,078 INFO L78 Accepts]: Start accepts. Automaton has 24171 states and 28203 transitions. Word has length 464 [2018-10-24 16:37:54,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:37:54,079 INFO L481 AbstractCegarLoop]: Abstraction has 24171 states and 28203 transitions. [2018-10-24 16:37:54,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:37:54,080 INFO L276 IsEmpty]: Start isEmpty. Operand 24171 states and 28203 transitions. [2018-10-24 16:37:54,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 582 [2018-10-24 16:37:54,111 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:37:54,112 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:37:54,112 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:37:54,112 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:37:54,112 INFO L82 PathProgramCache]: Analyzing trace with hash 73681197, now seen corresponding path program 1 times [2018-10-24 16:37:54,113 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:37:54,113 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:37:54,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:37:54,114 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:37:54,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:37:54,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:37:54,958 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 497 proven. 0 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2018-10-24 16:37:54,958 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:37:54,959 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:37:54,960 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:37:54,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:37:54,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:37:54,961 INFO L87 Difference]: Start difference. First operand 24171 states and 28203 transitions. Second operand 4 states. [2018-10-24 16:37:59,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:37:59,814 INFO L93 Difference]: Finished difference Result 52536 states and 61880 transitions. [2018-10-24 16:37:59,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:37:59,821 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 581 [2018-10-24 16:37:59,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:37:59,871 INFO L225 Difference]: With dead ends: 52536 [2018-10-24 16:37:59,871 INFO L226 Difference]: Without dead ends: 28667 [2018-10-24 16:37:59,894 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:37:59,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28667 states. [2018-10-24 16:38:00,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28667 to 28662. [2018-10-24 16:38:00,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28662 states. [2018-10-24 16:38:00,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28662 states to 28662 states and 32496 transitions. [2018-10-24 16:38:00,235 INFO L78 Accepts]: Start accepts. Automaton has 28662 states and 32496 transitions. Word has length 581 [2018-10-24 16:38:00,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:38:00,236 INFO L481 AbstractCegarLoop]: Abstraction has 28662 states and 32496 transitions. [2018-10-24 16:38:00,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:38:00,236 INFO L276 IsEmpty]: Start isEmpty. Operand 28662 states and 32496 transitions. [2018-10-24 16:38:00,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 607 [2018-10-24 16:38:00,270 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:38:00,271 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-24 16:38:00,271 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:38:00,272 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:38:00,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1887791622, now seen corresponding path program 1 times [2018-10-24 16:38:00,272 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:38:00,272 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:38:00,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:38:00,273 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:38:00,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:38:00,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:38:01,089 INFO L134 CoverageAnalysis]: Checked inductivity of 710 backedges. 385 proven. 0 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-10-24 16:38:01,090 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:38:01,090 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:38:01,091 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 16:38:01,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 16:38:01,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:38:01,091 INFO L87 Difference]: Start difference. First operand 28662 states and 32496 transitions. Second operand 3 states. [2018-10-24 16:38:04,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:38:04,954 INFO L93 Difference]: Finished difference Result 72020 states and 81710 transitions. [2018-10-24 16:38:04,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 16:38:04,955 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 606 [2018-10-24 16:38:04,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:38:05,007 INFO L225 Difference]: With dead ends: 72020 [2018-10-24 16:38:05,007 INFO L226 Difference]: Without dead ends: 43660 [2018-10-24 16:38:05,031 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:38:05,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43660 states. [2018-10-24 16:38:05,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43660 to 43660. [2018-10-24 16:38:05,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43660 states. [2018-10-24 16:38:05,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43660 states to 43660 states and 48797 transitions. [2018-10-24 16:38:05,551 INFO L78 Accepts]: Start accepts. Automaton has 43660 states and 48797 transitions. Word has length 606 [2018-10-24 16:38:05,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:38:05,552 INFO L481 AbstractCegarLoop]: Abstraction has 43660 states and 48797 transitions. [2018-10-24 16:38:05,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 16:38:05,553 INFO L276 IsEmpty]: Start isEmpty. Operand 43660 states and 48797 transitions. [2018-10-24 16:38:05,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 619 [2018-10-24 16:38:05,596 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:38:05,597 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-24 16:38:05,597 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:38:05,598 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:38:05,598 INFO L82 PathProgramCache]: Analyzing trace with hash -2055309871, now seen corresponding path program 1 times [2018-10-24 16:38:05,598 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:38:05,598 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:38:05,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:38:05,599 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:38:05,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:38:05,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:38:06,147 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 5 [2018-10-24 16:38:06,379 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 385 proven. 0 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked. [2018-10-24 16:38:06,380 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:38:06,380 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:38:06,381 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:38:06,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:38:06,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:38:06,381 INFO L87 Difference]: Start difference. First operand 43660 states and 48797 transitions. Second operand 4 states. [2018-10-24 16:38:12,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:38:12,878 INFO L93 Difference]: Finished difference Result 90929 states and 101805 transitions. [2018-10-24 16:38:12,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:38:12,879 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 618 [2018-10-24 16:38:12,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:38:12,932 INFO L225 Difference]: With dead ends: 90929 [2018-10-24 16:38:12,932 INFO L226 Difference]: Without dead ends: 47571 [2018-10-24 16:38:12,960 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:38:12,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47571 states. [2018-10-24 16:38:13,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47571 to 47559. [2018-10-24 16:38:13,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47559 states. [2018-10-24 16:38:13,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47559 states to 47559 states and 52229 transitions. [2018-10-24 16:38:13,495 INFO L78 Accepts]: Start accepts. Automaton has 47559 states and 52229 transitions. Word has length 618 [2018-10-24 16:38:13,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:38:13,497 INFO L481 AbstractCegarLoop]: Abstraction has 47559 states and 52229 transitions. [2018-10-24 16:38:13,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:38:13,498 INFO L276 IsEmpty]: Start isEmpty. Operand 47559 states and 52229 transitions. [2018-10-24 16:38:13,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 695 [2018-10-24 16:38:13,543 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:38:13,544 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:38:13,544 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:38:13,544 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:38:13,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1343030726, now seen corresponding path program 1 times [2018-10-24 16:38:13,545 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:38:13,545 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:38:13,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:38:13,546 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:38:13,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:38:13,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:38:15,308 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 340 proven. 306 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2018-10-24 16:38:15,308 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:38:15,308 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:38:15,316 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:38:15,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:38:15,499 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:38:19,294 WARN L179 SmtUtils]: Spent 3.64 s on a formula simplification. DAG size of input: 141 DAG size of output: 24 [2018-10-24 16:38:19,812 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 179 proven. 0 refuted. 0 times theorem prover too weak. 619 trivial. 0 not checked. [2018-10-24 16:38:19,834 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:38:19,834 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2018-10-24 16:38:19,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 16:38:19,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 16:38:19,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-10-24 16:38:19,835 INFO L87 Difference]: Start difference. First operand 47559 states and 52229 transitions. Second operand 6 states. [2018-10-24 16:38:31,898 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 29 Received shutdown request... [2018-10-24 16:41:00,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-24 16:41:00,024 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 16:41:00,028 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 16:41:00,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 04:41:00 BoogieIcfgContainer [2018-10-24 16:41:00,029 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 16:41:00,030 INFO L168 Benchmark]: Toolchain (without parser) took 257370.66 ms. Allocated memory was 1.5 GB in the beginning and 3.4 GB in the end (delta: 1.9 GB). Free memory was 1.4 GB in the beginning and 1.5 GB in the end (delta: -111.6 MB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. [2018-10-24 16:41:00,031 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 16:41:00,032 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1292.57 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: 105.9 MB). Peak memory consumption was 105.9 MB. Max. memory is 7.1 GB. [2018-10-24 16:41:00,033 INFO L168 Benchmark]: Boogie Procedure Inliner took 420.09 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 776.5 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -902.2 MB). Peak memory consumption was 33.3 MB. Max. memory is 7.1 GB. [2018-10-24 16:41:00,034 INFO L168 Benchmark]: Boogie Preprocessor took 276.57 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 27.5 MB). Peak memory consumption was 27.5 MB. Max. memory is 7.1 GB. [2018-10-24 16:41:00,034 INFO L168 Benchmark]: RCFGBuilder took 7972.99 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 309.3 MB). Peak memory consumption was 309.3 MB. Max. memory is 7.1 GB. [2018-10-24 16:41:00,035 INFO L168 Benchmark]: TraceAbstraction took 247403.65 ms. Allocated memory was 2.3 GB in the beginning and 3.4 GB in the end (delta: 1.1 GB). Free memory was 1.9 GB in the beginning and 1.5 GB in the end (delta: 347.9 MB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. [2018-10-24 16:41:00,040 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1292.57 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: 105.9 MB). Peak memory consumption was 105.9 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 420.09 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 776.5 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -902.2 MB). Peak memory consumption was 33.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 276.57 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 27.5 MB). Peak memory consumption was 27.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 7972.99 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 309.3 MB). Peak memory consumption was 309.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 247403.65 ms. Allocated memory was 2.3 GB in the beginning and 3.4 GB in the end (delta: 1.1 GB). Free memory was 1.9 GB in the beginning and 1.5 GB in the end (delta: 347.9 MB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 145]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 145). Cancelled while BasicCegarLoop was constructing difference of abstraction (47559states) and FLOYD_HOARE automaton (currently 9 states, 6 states before enhancement),while ReachableStatesComputation was computing reachable states (57140 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 425 locations, 1 error locations. TIMEOUT Result, 247.3s OverallTime, 10 OverallIterations, 5 TraceHistogramMax, 231.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3404 SDtfs, 10744 SDslu, 1845 SDs, 0 SdLazy, 24898 SolverSat, 5357 SolverUnsat, 58 SolverUnknown, 0 SolverNotchecked, 220.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1178 GetRequests, 1136 SyntacticMatches, 7 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 7.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47559occurred in iteration=9, 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: 2.5s AutomataMinimizationTime, 9 MinimizatonAttempts, 13977 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 8.6s InterpolantComputationTime, 4799 NumberOfCodeBlocks, 4799 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 4786 ConstructedInterpolants, 45 QuantifiedInterpolants, 8206808 SizeOfPredicates, 5 NumberOfNonLiveVariables, 1394 ConjunctsInSsa, 13 ConjunctsInUnsatCore, 13 InterpolantComputations, 9 PerfectInterpolantSequences, 4135/4519 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown