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_label33_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-0fd1304 [2018-10-23 18:15:07,607 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-23 18:15:07,609 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-23 18:15:07,624 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-23 18:15:07,624 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-23 18:15:07,625 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-23 18:15:07,626 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-23 18:15:07,628 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-23 18:15:07,630 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-23 18:15:07,631 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-23 18:15:07,632 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-23 18:15:07,632 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-23 18:15:07,633 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-23 18:15:07,634 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-23 18:15:07,635 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-23 18:15:07,636 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-23 18:15:07,636 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-23 18:15:07,638 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-23 18:15:07,640 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-23 18:15:07,642 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-23 18:15:07,643 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-23 18:15:07,645 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-23 18:15:07,647 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-23 18:15:07,647 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-23 18:15:07,648 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-23 18:15:07,648 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-23 18:15:07,650 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-23 18:15:07,650 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-23 18:15:07,651 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-23 18:15:07,654 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-23 18:15:07,654 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-23 18:15:07,655 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-23 18:15:07,658 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 18:15:07,677 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-23 18:15:07,677 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-23 18:15:07,680 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-23 18:15:07,681 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-23 18:15:07,681 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-23 18:15:07,681 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-23 18:15:07,684 INFO L133 SettingsManager]: * Use SBE=true [2018-10-23 18:15:07,684 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-23 18:15:07,684 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-23 18:15:07,685 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-23 18:15:07,685 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-23 18:15:07,685 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-23 18:15:07,685 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-23 18:15:07,685 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-23 18:15:07,686 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-23 18:15:07,686 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-23 18:15:07,686 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-23 18:15:07,686 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-23 18:15:07,688 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-23 18:15:07,688 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 18:15:07,688 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-23 18:15:07,689 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-23 18:15:07,689 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-23 18:15:07,689 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-23 18:15:07,689 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-23 18:15:07,690 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-23 18:15:07,690 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-23 18:15:07,690 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-23 18:15:07,759 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-23 18:15:07,776 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-23 18:15:07,780 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-23 18:15:07,782 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-23 18:15:07,782 INFO L276 PluginConnector]: CDTParser initialized [2018-10-23 18:15:07,783 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label33_false-unreach-call.c [2018-10-23 18:15:07,848 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/a9f73eb79/47d2b86d0d234efdac9703d2316d1686/FLAG55cfd1f6d [2018-10-23 18:15:08,496 INFO L298 CDTParser]: Found 1 translation units. [2018-10-23 18:15:08,497 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label33_false-unreach-call.c [2018-10-23 18:15:08,515 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/a9f73eb79/47d2b86d0d234efdac9703d2316d1686/FLAG55cfd1f6d [2018-10-23 18:15:08,531 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/a9f73eb79/47d2b86d0d234efdac9703d2316d1686 [2018-10-23 18:15:08,542 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-23 18:15:08,544 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-23 18:15:08,545 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-23 18:15:08,545 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-23 18:15:08,549 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-23 18:15:08,550 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:15:08" (1/1) ... [2018-10-23 18:15:08,554 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ad6d500 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:15:08, skipping insertion in model container [2018-10-23 18:15:08,554 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:15:08" (1/1) ... [2018-10-23 18:15:08,565 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-23 18:15:08,666 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-23 18:15:09,419 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 18:15:09,424 INFO L189 MainTranslator]: Completed pre-run [2018-10-23 18:15:09,726 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 18:15:09,746 INFO L193 MainTranslator]: Completed translation [2018-10-23 18:15:09,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:15:09 WrapperNode [2018-10-23 18:15:09,747 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-23 18:15:09,748 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-23 18:15:09,748 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-23 18:15:09,749 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-23 18:15:09,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:15:09" (1/1) ... [2018-10-23 18:15:09,795 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:15:09" (1/1) ... [2018-10-23 18:15:10,106 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-23 18:15:10,107 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-23 18:15:10,107 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-23 18:15:10,107 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-23 18:15:10,118 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:15:09" (1/1) ... [2018-10-23 18:15:10,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:15:09" (1/1) ... [2018-10-23 18:15:10,138 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:15:09" (1/1) ... [2018-10-23 18:15:10,139 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:15:09" (1/1) ... [2018-10-23 18:15:10,233 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:15:09" (1/1) ... [2018-10-23 18:15:10,252 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:15:09" (1/1) ... [2018-10-23 18:15:10,317 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:15:09" (1/1) ... [2018-10-23 18:15:10,360 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-23 18:15:10,360 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-23 18:15:10,360 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-23 18:15:10,361 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-23 18:15:10,362 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:15:09" (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 18:15:10,430 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-23 18:15:10,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-23 18:15:10,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-23 18:15:19,574 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-23 18:15:19,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:15:19 BoogieIcfgContainer [2018-10-23 18:15:19,575 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-23 18:15:19,576 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-23 18:15:19,577 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-23 18:15:19,580 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-23 18:15:19,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:15:08" (1/3) ... [2018-10-23 18:15:19,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eaba94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:15:19, skipping insertion in model container [2018-10-23 18:15:19,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:15:09" (2/3) ... [2018-10-23 18:15:19,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eaba94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:15:19, skipping insertion in model container [2018-10-23 18:15:19,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:15:19" (3/3) ... [2018-10-23 18:15:19,584 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label33_false-unreach-call.c [2018-10-23 18:15:19,594 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-23 18:15:19,603 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-23 18:15:19,621 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-23 18:15:19,660 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-23 18:15:19,661 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-23 18:15:19,661 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-23 18:15:19,661 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-23 18:15:19,661 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-23 18:15:19,661 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-23 18:15:19,661 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-23 18:15:19,662 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-23 18:15:19,662 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-23 18:15:19,691 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states. [2018-10-23 18:15:19,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-23 18:15:19,701 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:15:19,703 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] [2018-10-23 18:15:19,705 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:15:19,713 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:15:19,714 INFO L82 PathProgramCache]: Analyzing trace with hash -314381782, now seen corresponding path program 1 times [2018-10-23 18:15:19,715 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:15:19,716 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:15:19,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:15:19,770 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:15:19,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:15:19,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:15:20,119 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 18:15:20,122 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:15:20,123 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 18:15:20,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 18:15:20,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 18:15:20,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:15:20,147 INFO L87 Difference]: Start difference. First operand 425 states. Second operand 4 states. [2018-10-23 18:15:28,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:15:28,383 INFO L93 Difference]: Finished difference Result 1510 states and 2778 transitions. [2018-10-23 18:15:28,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 18:15:28,385 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2018-10-23 18:15:28,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:15:28,413 INFO L225 Difference]: With dead ends: 1510 [2018-10-23 18:15:28,413 INFO L226 Difference]: Without dead ends: 1078 [2018-10-23 18:15:28,420 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 18:15:28,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2018-10-23 18:15:28,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 742. [2018-10-23 18:15:28,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 742 states. [2018-10-23 18:15:28,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 1239 transitions. [2018-10-23 18:15:28,527 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 1239 transitions. Word has length 23 [2018-10-23 18:15:28,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:15:28,529 INFO L481 AbstractCegarLoop]: Abstraction has 742 states and 1239 transitions. [2018-10-23 18:15:28,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 18:15:28,529 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 1239 transitions. [2018-10-23 18:15:28,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-23 18:15:28,534 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:15:28,534 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:15:28,534 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:15:28,535 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:15:28,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1825296091, now seen corresponding path program 1 times [2018-10-23 18:15:28,535 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:15:28,535 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:15:28,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:15:28,537 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:15:28,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:15:28,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:15:28,807 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 18:15:28,807 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:15:28,808 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 18:15:28,809 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 18:15:28,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 18:15:28,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:15:28,810 INFO L87 Difference]: Start difference. First operand 742 states and 1239 transitions. Second operand 4 states. [2018-10-23 18:15:35,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:15:35,003 INFO L93 Difference]: Finished difference Result 2749 states and 4685 transitions. [2018-10-23 18:15:35,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 18:15:35,004 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 92 [2018-10-23 18:15:35,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:15:35,016 INFO L225 Difference]: With dead ends: 2749 [2018-10-23 18:15:35,016 INFO L226 Difference]: Without dead ends: 2009 [2018-10-23 18:15:35,020 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 18:15:35,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2009 states. [2018-10-23 18:15:35,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2009 to 1342. [2018-10-23 18:15:35,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1342 states. [2018-10-23 18:15:35,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1342 states to 1342 states and 2021 transitions. [2018-10-23 18:15:35,065 INFO L78 Accepts]: Start accepts. Automaton has 1342 states and 2021 transitions. Word has length 92 [2018-10-23 18:15:35,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:15:35,066 INFO L481 AbstractCegarLoop]: Abstraction has 1342 states and 2021 transitions. [2018-10-23 18:15:35,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 18:15:35,066 INFO L276 IsEmpty]: Start isEmpty. Operand 1342 states and 2021 transitions. [2018-10-23 18:15:35,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-23 18:15:35,070 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:15:35,070 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-23 18:15:35,070 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:15:35,070 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:15:35,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1044270609, now seen corresponding path program 1 times [2018-10-23 18:15:35,071 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:15:35,071 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:15:35,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:15:35,072 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:15:35,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:15:35,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:15:35,638 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 18:15:35,638 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:15:35,639 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-23 18:15:35,639 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 18:15:35,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 18:15:35,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-23 18:15:35,640 INFO L87 Difference]: Start difference. First operand 1342 states and 2021 transitions. Second operand 6 states. [2018-10-23 18:15:50,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:15:50,133 INFO L93 Difference]: Finished difference Result 5410 states and 8155 transitions. [2018-10-23 18:15:50,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 18:15:50,135 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 100 [2018-10-23 18:15:50,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:15:50,156 INFO L225 Difference]: With dead ends: 5410 [2018-10-23 18:15:50,157 INFO L226 Difference]: Without dead ends: 4070 [2018-10-23 18:15:50,160 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-23 18:15:50,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4070 states. [2018-10-23 18:15:50,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4070 to 3753. [2018-10-23 18:15:50,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3753 states. [2018-10-23 18:15:50,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3753 states to 3753 states and 4926 transitions. [2018-10-23 18:15:50,233 INFO L78 Accepts]: Start accepts. Automaton has 3753 states and 4926 transitions. Word has length 100 [2018-10-23 18:15:50,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:15:50,234 INFO L481 AbstractCegarLoop]: Abstraction has 3753 states and 4926 transitions. [2018-10-23 18:15:50,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-23 18:15:50,234 INFO L276 IsEmpty]: Start isEmpty. Operand 3753 states and 4926 transitions. [2018-10-23 18:15:50,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-10-23 18:15:50,239 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:15:50,239 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:15:50,239 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:15:50,239 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:15:50,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1500239364, now seen corresponding path program 1 times [2018-10-23 18:15:50,240 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:15:50,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:15:50,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:15:50,241 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:15:50,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:15:50,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:15:50,837 WARN L179 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 13 [2018-10-23 18:15:51,045 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 112 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 18:15:51,046 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:15:51,046 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 18:15:51,056 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:15:51,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:15:51,142 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 18:15:51,900 WARN L179 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2018-10-23 18:15:52,041 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 41 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 18:15:52,076 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 18:15:52,077 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2018-10-23 18:15:52,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-23 18:15:52,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-23 18:15:52,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2018-10-23 18:15:52,082 INFO L87 Difference]: Start difference. First operand 3753 states and 4926 transitions. Second operand 12 states. [2018-10-23 18:16:09,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:16:09,435 INFO L93 Difference]: Finished difference Result 12338 states and 16539 transitions. [2018-10-23 18:16:09,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-23 18:16:09,436 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 192 [2018-10-23 18:16:09,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:16:09,466 INFO L225 Difference]: With dead ends: 12338 [2018-10-23 18:16:09,467 INFO L226 Difference]: Without dead ends: 6160 [2018-10-23 18:16:09,474 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2018-10-23 18:16:09,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6160 states. [2018-10-23 18:16:09,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6160 to 5550. [2018-10-23 18:16:09,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5550 states. [2018-10-23 18:16:09,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5550 states to 5550 states and 6502 transitions. [2018-10-23 18:16:09,578 INFO L78 Accepts]: Start accepts. Automaton has 5550 states and 6502 transitions. Word has length 192 [2018-10-23 18:16:09,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:16:09,578 INFO L481 AbstractCegarLoop]: Abstraction has 5550 states and 6502 transitions. [2018-10-23 18:16:09,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-23 18:16:09,579 INFO L276 IsEmpty]: Start isEmpty. Operand 5550 states and 6502 transitions. [2018-10-23 18:16:09,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2018-10-23 18:16:09,582 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:16:09,582 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-23 18:16:09,582 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:16:09,583 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:16:09,583 INFO L82 PathProgramCache]: Analyzing trace with hash 2051937574, now seen corresponding path program 1 times [2018-10-23 18:16:09,583 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:16:09,583 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:16:09,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:16:09,584 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:16:09,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:16:09,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:16:10,041 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 18:16:10,041 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:16:10,042 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 18:16:10,042 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 18:16:10,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 18:16:10,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:16:10,043 INFO L87 Difference]: Start difference. First operand 5550 states and 6502 transitions. Second operand 4 states. [2018-10-23 18:16:16,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:16:16,504 INFO L93 Difference]: Finished difference Result 16203 states and 19528 transitions. [2018-10-23 18:16:16,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 18:16:16,506 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 306 [2018-10-23 18:16:16,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:16:16,550 INFO L225 Difference]: With dead ends: 16203 [2018-10-23 18:16:16,550 INFO L226 Difference]: Without dead ends: 10655 [2018-10-23 18:16:16,558 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 [2018-10-23 18:16:16,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10655 states. [2018-10-23 18:16:16,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10655 to 10348. [2018-10-23 18:16:16,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10348 states. [2018-10-23 18:16:16,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10348 states to 10348 states and 12026 transitions. [2018-10-23 18:16:16,749 INFO L78 Accepts]: Start accepts. Automaton has 10348 states and 12026 transitions. Word has length 306 [2018-10-23 18:16:16,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:16:16,750 INFO L481 AbstractCegarLoop]: Abstraction has 10348 states and 12026 transitions. [2018-10-23 18:16:16,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 18:16:16,750 INFO L276 IsEmpty]: Start isEmpty. Operand 10348 states and 12026 transitions. [2018-10-23 18:16:16,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2018-10-23 18:16:16,763 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:16:16,764 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-23 18:16:16,764 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:16:16,764 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:16:16,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1504010767, now seen corresponding path program 1 times [2018-10-23 18:16:16,765 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:16:16,765 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:16:16,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:16:16,766 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:16:16,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:16:16,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:16:17,635 WARN L179 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2018-10-23 18:16:17,893 WARN L179 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2018-10-23 18:16:18,184 WARN L179 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-10-23 18:16:18,299 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 209 proven. 1 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2018-10-23 18:16:18,300 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:16:18,300 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 18:16:18,307 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:16:18,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:16:18,440 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 18:16:18,584 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 215 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-10-23 18:16:18,605 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 18:16:18,605 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2018-10-23 18:16:18,607 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-23 18:16:18,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-23 18:16:18,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-10-23 18:16:18,608 INFO L87 Difference]: Start difference. First operand 10348 states and 12026 transitions. Second operand 7 states. [2018-10-23 18:16:30,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:16:30,143 INFO L93 Difference]: Finished difference Result 28605 states and 33442 transitions. [2018-10-23 18:16:30,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-23 18:16:30,144 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 479 [2018-10-23 18:16:30,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:16:30,189 INFO L225 Difference]: With dead ends: 28605 [2018-10-23 18:16:30,189 INFO L226 Difference]: Without dead ends: 18259 [2018-10-23 18:16:30,202 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 484 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-10-23 18:16:30,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18259 states. [2018-10-23 18:16:30,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18259 to 15039. [2018-10-23 18:16:30,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15039 states. [2018-10-23 18:16:30,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15039 states to 15039 states and 17475 transitions. [2018-10-23 18:16:30,452 INFO L78 Accepts]: Start accepts. Automaton has 15039 states and 17475 transitions. Word has length 479 [2018-10-23 18:16:30,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:16:30,453 INFO L481 AbstractCegarLoop]: Abstraction has 15039 states and 17475 transitions. [2018-10-23 18:16:30,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-23 18:16:30,453 INFO L276 IsEmpty]: Start isEmpty. Operand 15039 states and 17475 transitions. [2018-10-23 18:16:30,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 624 [2018-10-23 18:16:30,474 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:16:30,475 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:16:30,475 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:16:30,476 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:16:30,476 INFO L82 PathProgramCache]: Analyzing trace with hash 774888924, now seen corresponding path program 1 times [2018-10-23 18:16:30,476 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:16:30,476 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:16:30,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:16:30,478 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:16:30,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:16:30,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:16:30,926 INFO L134 CoverageAnalysis]: Checked inductivity of 701 backedges. 343 proven. 0 refuted. 0 times theorem prover too weak. 358 trivial. 0 not checked. [2018-10-23 18:16:30,926 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:16:30,926 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 18:16:30,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 18:16:30,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 18:16:30,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 18:16:30,928 INFO L87 Difference]: Start difference. First operand 15039 states and 17475 transitions. Second operand 3 states. [2018-10-23 18:16:35,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:16:35,132 INFO L93 Difference]: Finished difference Result 30374 states and 35301 transitions. [2018-10-23 18:16:35,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 18:16:35,133 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 623 [2018-10-23 18:16:35,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:16:35,161 INFO L225 Difference]: With dead ends: 30374 [2018-10-23 18:16:35,161 INFO L226 Difference]: Without dead ends: 15337 [2018-10-23 18:16:35,176 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 18:16:35,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15337 states. [2018-10-23 18:16:35,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15337 to 15037. [2018-10-23 18:16:35,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15037 states. [2018-10-23 18:16:35,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15037 states to 15037 states and 17471 transitions. [2018-10-23 18:16:35,394 INFO L78 Accepts]: Start accepts. Automaton has 15037 states and 17471 transitions. Word has length 623 [2018-10-23 18:16:35,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:16:35,396 INFO L481 AbstractCegarLoop]: Abstraction has 15037 states and 17471 transitions. [2018-10-23 18:16:35,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 18:16:35,396 INFO L276 IsEmpty]: Start isEmpty. Operand 15037 states and 17471 transitions. [2018-10-23 18:16:35,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 652 [2018-10-23 18:16:35,419 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:16:35,420 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-23 18:16:35,421 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:16:35,421 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:16:35,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1714846665, now seen corresponding path program 1 times [2018-10-23 18:16:35,421 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:16:35,421 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:16:35,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:16:35,422 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:16:35,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:16:35,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:16:36,042 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 461 trivial. 0 not checked. [2018-10-23 18:16:36,043 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:16:36,043 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 18:16:36,044 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 18:16:36,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 18:16:36,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 18:16:36,045 INFO L87 Difference]: Start difference. First operand 15037 states and 17471 transitions. Second operand 3 states. [2018-10-23 18:16:39,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:16:39,746 INFO L93 Difference]: Finished difference Result 40034 states and 46470 transitions. [2018-10-23 18:16:39,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 18:16:39,746 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 651 [2018-10-23 18:16:39,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:16:39,792 INFO L225 Difference]: With dead ends: 40034 [2018-10-23 18:16:39,792 INFO L226 Difference]: Without dead ends: 24999 [2018-10-23 18:16:39,809 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 18:16:39,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24999 states. [2018-10-23 18:16:40,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24999 to 24999. [2018-10-23 18:16:40,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24999 states. [2018-10-23 18:16:40,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24999 states to 24999 states and 28442 transitions. [2018-10-23 18:16:40,510 INFO L78 Accepts]: Start accepts. Automaton has 24999 states and 28442 transitions. Word has length 651 [2018-10-23 18:16:40,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:16:40,511 INFO L481 AbstractCegarLoop]: Abstraction has 24999 states and 28442 transitions. [2018-10-23 18:16:40,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 18:16:40,511 INFO L276 IsEmpty]: Start isEmpty. Operand 24999 states and 28442 transitions. [2018-10-23 18:16:40,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 698 [2018-10-23 18:16:40,547 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:16:40,548 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 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] [2018-10-23 18:16:40,548 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:16:40,549 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:16:40,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1598683598, now seen corresponding path program 1 times [2018-10-23 18:16:40,549 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:16:40,549 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:16:40,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:16:40,551 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:16:40,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:16:40,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:16:41,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 440 proven. 0 refuted. 0 times theorem prover too weak. 583 trivial. 0 not checked. [2018-10-23 18:16:41,269 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:16:41,269 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 18:16:41,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 18:16:41,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 18:16:41,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 18:16:41,270 INFO L87 Difference]: Start difference. First operand 24999 states and 28442 transitions. Second operand 3 states. [2018-10-23 18:16:45,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:16:45,350 INFO L93 Difference]: Finished difference Result 55182 states and 62775 transitions. [2018-10-23 18:16:45,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 18:16:45,350 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 697 [2018-10-23 18:16:45,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:16:45,400 INFO L225 Difference]: With dead ends: 55182 [2018-10-23 18:16:45,400 INFO L226 Difference]: Without dead ends: 30185 [2018-10-23 18:16:45,421 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 18:16:45,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30185 states. [2018-10-23 18:16:45,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30185 to 29564. [2018-10-23 18:16:45,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29564 states. [2018-10-23 18:16:45,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29564 states to 29564 states and 33248 transitions. [2018-10-23 18:16:45,797 INFO L78 Accepts]: Start accepts. Automaton has 29564 states and 33248 transitions. Word has length 697 [2018-10-23 18:16:45,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:16:45,798 INFO L481 AbstractCegarLoop]: Abstraction has 29564 states and 33248 transitions. [2018-10-23 18:16:45,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 18:16:45,798 INFO L276 IsEmpty]: Start isEmpty. Operand 29564 states and 33248 transitions. [2018-10-23 18:16:45,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 722 [2018-10-23 18:16:45,828 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:16:45,829 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:16:45,829 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:16:45,829 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:16:45,830 INFO L82 PathProgramCache]: Analyzing trace with hash -597118852, now seen corresponding path program 1 times [2018-10-23 18:16:45,830 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:16:45,830 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:16:45,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:16:45,831 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:16:45,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:16:45,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:16:46,527 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-10-23 18:16:46,880 WARN L179 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 18 [2018-10-23 18:16:48,187 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 572 proven. 107 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2018-10-23 18:16:48,187 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:16:48,187 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 18:16:48,195 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:16:48,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:16:48,386 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 18:16:48,731 WARN L179 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 31 [2018-10-23 18:16:50,010 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 572 proven. 107 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2018-10-23 18:16:50,031 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 18:16:50,031 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 3] total 11 [2018-10-23 18:16:50,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-23 18:16:50,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-23 18:16:50,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2018-10-23 18:16:50,033 INFO L87 Difference]: Start difference. First operand 29564 states and 33248 transitions. Second operand 12 states. Received shutdown request... [2018-10-23 18:19:23,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-23 18:19:23,341 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-23 18:19:23,346 WARN L205 ceAbstractionStarter]: Timeout [2018-10-23 18:19:23,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:19:23 BoogieIcfgContainer [2018-10-23 18:19:23,347 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-23 18:19:23,348 INFO L168 Benchmark]: Toolchain (without parser) took 254805.23 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 2.0 GB). Free memory was 1.4 GB in the beginning and 3.2 GB in the end (delta: -1.7 GB). Peak memory consumption was 215.8 MB. Max. memory is 7.1 GB. [2018-10-23 18:19:23,349 INFO L168 Benchmark]: CDTParser took 0.22 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. [2018-10-23 18:19:23,350 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1202.58 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: 97.8 MB). Peak memory consumption was 97.8 MB. Max. memory is 7.1 GB. [2018-10-23 18:19:23,350 INFO L168 Benchmark]: Boogie Procedure Inliner took 358.39 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: -894.1 MB). Peak memory consumption was 33.5 MB. Max. memory is 7.1 GB. [2018-10-23 18:19:23,351 INFO L168 Benchmark]: Boogie Preprocessor took 252.96 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: 41.8 MB). Peak memory consumption was 41.8 MB. Max. memory is 7.1 GB. [2018-10-23 18:19:23,352 INFO L168 Benchmark]: RCFGBuilder took 9215.30 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: 289.3 MB). Peak memory consumption was 289.3 MB. Max. memory is 7.1 GB. [2018-10-23 18:19:23,353 INFO L168 Benchmark]: TraceAbstraction took 243770.81 ms. Allocated memory was 2.3 GB in the beginning and 3.5 GB in the end (delta: 1.2 GB). Free memory was 1.9 GB in the beginning and 3.2 GB in the end (delta: -1.3 GB). There was no memory consumed. Max. memory is 7.1 GB. [2018-10-23 18:19:23,360 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 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 1202.58 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: 97.8 MB). Peak memory consumption was 97.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 358.39 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: -894.1 MB). Peak memory consumption was 33.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 252.96 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: 41.8 MB). Peak memory consumption was 41.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 9215.30 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: 289.3 MB). Peak memory consumption was 289.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 243770.81 ms. Allocated memory was 2.3 GB in the beginning and 3.5 GB in the end (delta: 1.2 GB). Free memory was 1.9 GB in the beginning and 3.2 GB in the end (delta: -1.3 GB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 73]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 73). Cancelled while BasicCegarLoop was constructing difference of abstraction (29564states) and FLOYD_HOARE automaton (currently 8 states, 12 states before enhancement),while ReachableStatesComputation was computing reachable states (62017 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 425 locations, 1 error locations. TIMEOUT Result, 243.6s OverallTime, 10 OverallIterations, 6 TraceHistogramMax, 229.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2567 SDtfs, 16685 SDslu, 2093 SDs, 0 SdLazy, 31000 SolverSat, 5414 SolverUnsat, 71 SolverUnknown, 0 SolverNotchecked, 218.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1468 GetRequests, 1402 SyntacticMatches, 15 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 4.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29564occurred 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: 2.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 6378 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 8.1s InterpolantComputationTime, 5276 NumberOfCodeBlocks, 5276 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 5263 ConstructedInterpolants, 108 QuantifiedInterpolants, 11459818 SizeOfPredicates, 3 NumberOfNonLiveVariables, 1709 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 13 InterpolantComputations, 8 PerfectInterpolantSequences, 4555/4851 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown