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/Problem16_label51_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 14:27:09,409 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 14:27:09,413 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 14:27:09,429 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 14:27:09,430 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 14:27:09,432 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 14:27:09,433 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 14:27:09,436 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 14:27:09,439 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 14:27:09,440 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 14:27:09,441 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 14:27:09,442 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 14:27:09,443 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 14:27:09,445 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 14:27:09,453 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 14:27:09,454 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 14:27:09,457 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 14:27:09,459 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 14:27:09,465 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 14:27:09,466 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 14:27:09,467 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 14:27:09,470 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 14:27:09,476 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-24 14:27:09,476 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-24 14:27:09,477 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-24 14:27:09,478 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-24 14:27:09,478 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-24 14:27:09,479 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-24 14:27:09,480 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-24 14:27:09,482 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-24 14:27:09,483 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-24 14:27:09,484 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-24 14:27:09,487 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-24 14:27:09,509 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 14:27:09,510 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 14:27:09,511 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 14:27:09,511 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 14:27:09,512 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 14:27:09,512 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 14:27:09,512 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 14:27:09,513 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 14:27:09,514 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 14:27:09,514 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 14:27:09,514 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 14:27:09,514 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 14:27:09,514 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 14:27:09,514 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 14:27:09,515 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 14:27:09,515 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 14:27:09,515 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 14:27:09,515 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 14:27:09,515 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 14:27:09,516 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 14:27:09,517 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 14:27:09,517 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 14:27:09,517 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 14:27:09,517 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 14:27:09,518 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 14:27:09,518 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 14:27:09,518 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 14:27:09,518 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 14:27:09,576 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 14:27:09,588 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 14:27:09,592 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 14:27:09,594 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 14:27:09,594 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 14:27:09,595 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label51_false-unreach-call.c [2018-10-24 14:27:09,662 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/1c718447d/213363687ed3484c914ea49d49955587/FLAG5aea3ccd2 [2018-10-24 14:27:10,329 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 14:27:10,330 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label51_false-unreach-call.c [2018-10-24 14:27:10,352 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/1c718447d/213363687ed3484c914ea49d49955587/FLAG5aea3ccd2 [2018-10-24 14:27:10,373 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/1c718447d/213363687ed3484c914ea49d49955587 [2018-10-24 14:27:10,382 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 14:27:10,384 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 14:27:10,385 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 14:27:10,385 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 14:27:10,389 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 14:27:10,390 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:27:10" (1/1) ... [2018-10-24 14:27:10,393 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f32220e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:27:10, skipping insertion in model container [2018-10-24 14:27:10,393 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:27:10" (1/1) ... [2018-10-24 14:27:10,403 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 14:27:10,490 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 14:27:11,177 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 14:27:11,181 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 14:27:11,476 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 14:27:11,499 INFO L193 MainTranslator]: Completed translation [2018-10-24 14:27:11,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:27:11 WrapperNode [2018-10-24 14:27:11,500 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 14:27:11,501 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 14:27:11,501 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 14:27:11,502 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 14:27:11,513 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:27:11" (1/1) ... [2018-10-24 14:27:11,562 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:27:11" (1/1) ... [2018-10-24 14:27:11,862 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 14:27:11,863 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 14:27:11,863 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 14:27:11,863 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 14:27:11,875 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:27:11" (1/1) ... [2018-10-24 14:27:11,876 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:27:11" (1/1) ... [2018-10-24 14:27:11,893 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:27:11" (1/1) ... [2018-10-24 14:27:11,893 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:27:11" (1/1) ... [2018-10-24 14:27:11,966 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:27:11" (1/1) ... [2018-10-24 14:27:11,985 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:27:11" (1/1) ... [2018-10-24 14:27:12,014 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:27:11" (1/1) ... [2018-10-24 14:27:12,039 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 14:27:12,040 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 14:27:12,040 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 14:27:12,040 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 14:27:12,041 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:27:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 14:27:12,110 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-24 14:27:12,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 14:27:12,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 14:27:18,583 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 14:27:18,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:27:18 BoogieIcfgContainer [2018-10-24 14:27:18,585 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 14:27:18,586 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 14:27:18,586 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 14:27:18,590 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 14:27:18,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:27:10" (1/3) ... [2018-10-24 14:27:18,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58198df4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:27:18, skipping insertion in model container [2018-10-24 14:27:18,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:27:11" (2/3) ... [2018-10-24 14:27:18,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58198df4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:27:18, skipping insertion in model container [2018-10-24 14:27:18,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:27:18" (3/3) ... [2018-10-24 14:27:18,594 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label51_false-unreach-call.c [2018-10-24 14:27:18,604 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 14:27:18,616 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 14:27:18,636 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 14:27:18,681 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 14:27:18,682 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 14:27:18,683 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 14:27:18,683 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 14:27:18,683 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 14:27:18,683 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 14:27:18,683 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 14:27:18,684 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 14:27:18,684 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 14:27:18,715 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states. [2018-10-24 14:27:18,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-24 14:27:18,723 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:27:18,724 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:27:18,726 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:27:18,733 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:27:18,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1961166346, now seen corresponding path program 1 times [2018-10-24 14:27:18,736 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:27:18,736 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:27:18,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:27:18,798 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:27:18,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:27:18,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:27:19,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:27:19,196 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:27:19,196 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 14:27:19,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:27:19,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:27:19,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:27:19,221 INFO L87 Difference]: Start difference. First operand 397 states. Second operand 4 states. [2018-10-24 14:27:25,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:27:25,608 INFO L93 Difference]: Finished difference Result 1458 states and 2766 transitions. [2018-10-24 14:27:25,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:27:25,611 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2018-10-24 14:27:25,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:27:25,650 INFO L225 Difference]: With dead ends: 1458 [2018-10-24 14:27:25,650 INFO L226 Difference]: Without dead ends: 1054 [2018-10-24 14:27:25,658 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:27:25,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2018-10-24 14:27:25,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 1054. [2018-10-24 14:27:25,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1054 states. [2018-10-24 14:27:25,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 1752 transitions. [2018-10-24 14:27:25,774 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 1752 transitions. Word has length 15 [2018-10-24 14:27:25,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:27:25,774 INFO L481 AbstractCegarLoop]: Abstraction has 1054 states and 1752 transitions. [2018-10-24 14:27:25,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:27:25,775 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 1752 transitions. [2018-10-24 14:27:25,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-10-24 14:27:25,781 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:27:25,782 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-24 14:27:25,782 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:27:25,783 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:27:25,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1552426024, now seen corresponding path program 1 times [2018-10-24 14:27:25,783 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:27:25,783 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:27:25,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:27:25,785 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:27:25,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:27:25,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:27:26,643 WARN L179 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2018-10-24 14:27:27,009 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:27:27,009 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:27:27,010 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 14:27:27,013 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 14:27:27,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 14:27:27,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-24 14:27:27,014 INFO L87 Difference]: Start difference. First operand 1054 states and 1752 transitions. Second operand 7 states. [2018-10-24 14:27:32,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:27:32,358 INFO L93 Difference]: Finished difference Result 2451 states and 3938 transitions. [2018-10-24 14:27:32,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 14:27:32,359 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 147 [2018-10-24 14:27:32,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:27:32,370 INFO L225 Difference]: With dead ends: 2451 [2018-10-24 14:27:32,370 INFO L226 Difference]: Without dead ends: 1399 [2018-10-24 14:27:32,374 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-10-24 14:27:32,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1399 states. [2018-10-24 14:27:32,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1399 to 1384. [2018-10-24 14:27:32,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1384 states. [2018-10-24 14:27:32,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 2088 transitions. [2018-10-24 14:27:32,409 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 2088 transitions. Word has length 147 [2018-10-24 14:27:32,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:27:32,410 INFO L481 AbstractCegarLoop]: Abstraction has 1384 states and 2088 transitions. [2018-10-24 14:27:32,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 14:27:32,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 2088 transitions. [2018-10-24 14:27:32,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2018-10-24 14:27:32,417 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:27:32,418 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:27:32,418 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:27:32,419 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:27:32,419 INFO L82 PathProgramCache]: Analyzing trace with hash 834799704, now seen corresponding path program 1 times [2018-10-24 14:27:32,419 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:27:32,419 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:27:32,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:27:32,420 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:27:32,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:27:32,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:27:32,708 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:27:32,709 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:27:32,709 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 14:27:32,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 14:27:32,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 14:27:32,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 14:27:32,715 INFO L87 Difference]: Start difference. First operand 1384 states and 2088 transitions. Second operand 3 states. [2018-10-24 14:27:38,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:27:38,096 INFO L93 Difference]: Finished difference Result 3426 states and 5527 transitions. [2018-10-24 14:27:38,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 14:27:38,096 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 235 [2018-10-24 14:27:38,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:27:38,115 INFO L225 Difference]: With dead ends: 3426 [2018-10-24 14:27:38,115 INFO L226 Difference]: Without dead ends: 2374 [2018-10-24 14:27:38,118 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 14:27:38,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2374 states. [2018-10-24 14:27:38,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2374 to 2374. [2018-10-24 14:27:38,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2374 states. [2018-10-24 14:27:38,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2374 states to 2374 states and 3262 transitions. [2018-10-24 14:27:38,170 INFO L78 Accepts]: Start accepts. Automaton has 2374 states and 3262 transitions. Word has length 235 [2018-10-24 14:27:38,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:27:38,171 INFO L481 AbstractCegarLoop]: Abstraction has 2374 states and 3262 transitions. [2018-10-24 14:27:38,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 14:27:38,171 INFO L276 IsEmpty]: Start isEmpty. Operand 2374 states and 3262 transitions. [2018-10-24 14:27:38,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2018-10-24 14:27:38,184 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:27:38,184 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-24 14:27:38,184 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:27:38,188 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:27:38,188 INFO L82 PathProgramCache]: Analyzing trace with hash 552068421, now seen corresponding path program 1 times [2018-10-24 14:27:38,189 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:27:38,189 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:27:38,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:27:38,191 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:27:38,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:27:38,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:27:38,495 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-10-24 14:27:38,495 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:27:38,496 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 14:27:38,496 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 14:27:38,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 14:27:38,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 14:27:38,500 INFO L87 Difference]: Start difference. First operand 2374 states and 3262 transitions. Second operand 3 states. [2018-10-24 14:27:44,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:27:44,293 INFO L93 Difference]: Finished difference Result 6396 states and 9049 transitions. [2018-10-24 14:27:44,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 14:27:44,294 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 278 [2018-10-24 14:27:44,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:27:44,311 INFO L225 Difference]: With dead ends: 6396 [2018-10-24 14:27:44,311 INFO L226 Difference]: Without dead ends: 3344 [2018-10-24 14:27:44,315 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 14:27:44,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3344 states. [2018-10-24 14:27:44,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3344 to 3344. [2018-10-24 14:27:44,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3344 states. [2018-10-24 14:27:44,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3344 states to 3344 states and 3844 transitions. [2018-10-24 14:27:44,385 INFO L78 Accepts]: Start accepts. Automaton has 3344 states and 3844 transitions. Word has length 278 [2018-10-24 14:27:44,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:27:44,385 INFO L481 AbstractCegarLoop]: Abstraction has 3344 states and 3844 transitions. [2018-10-24 14:27:44,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 14:27:44,385 INFO L276 IsEmpty]: Start isEmpty. Operand 3344 states and 3844 transitions. [2018-10-24 14:27:44,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2018-10-24 14:27:44,390 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:27:44,390 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:27:44,391 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:27:44,391 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:27:44,391 INFO L82 PathProgramCache]: Analyzing trace with hash 196768485, now seen corresponding path program 1 times [2018-10-24 14:27:44,391 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:27:44,391 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:27:44,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:27:44,393 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:27:44,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:27:44,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:27:44,798 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-24 14:27:45,182 WARN L179 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 15 [2018-10-24 14:27:45,519 WARN L179 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 15 [2018-10-24 14:27:46,213 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 25 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:27:46,213 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:27:46,214 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 14:27:46,224 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:27:46,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:27:46,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:27:46,640 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2018-10-24 14:27:46,663 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 14:27:46,664 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 9 [2018-10-24 14:27:46,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-24 14:27:46,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-24 14:27:46,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2018-10-24 14:27:46,669 INFO L87 Difference]: Start difference. First operand 3344 states and 3844 transitions. Second operand 10 states. [2018-10-24 14:27:54,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:27:54,483 INFO L93 Difference]: Finished difference Result 8682 states and 9914 transitions. [2018-10-24 14:27:54,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-24 14:27:54,484 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 317 [2018-10-24 14:27:54,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:27:54,510 INFO L225 Difference]: With dead ends: 8682 [2018-10-24 14:27:54,511 INFO L226 Difference]: Without dead ends: 5670 [2018-10-24 14:27:54,516 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2018-10-24 14:27:54,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5670 states. [2018-10-24 14:27:54,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5670 to 4994. [2018-10-24 14:27:54,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4994 states. [2018-10-24 14:27:54,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4994 states to 4994 states and 5576 transitions. [2018-10-24 14:27:54,623 INFO L78 Accepts]: Start accepts. Automaton has 4994 states and 5576 transitions. Word has length 317 [2018-10-24 14:27:54,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:27:54,624 INFO L481 AbstractCegarLoop]: Abstraction has 4994 states and 5576 transitions. [2018-10-24 14:27:54,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-24 14:27:54,624 INFO L276 IsEmpty]: Start isEmpty. Operand 4994 states and 5576 transitions. [2018-10-24 14:27:54,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2018-10-24 14:27:54,635 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:27:54,636 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:27:54,636 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:27:54,636 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:27:54,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1547515660, now seen corresponding path program 1 times [2018-10-24 14:27:54,637 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:27:54,637 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:27:54,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:27:54,638 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:27:54,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:27:54,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:27:55,249 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 156 proven. 8 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2018-10-24 14:27:55,250 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:27:55,250 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) [2018-10-24 14:27:55,267 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 14:27:55,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:27:55,395 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:27:55,657 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 156 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2018-10-24 14:27:55,695 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 14:27:55,696 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2018-10-24 14:27:55,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 14:27:55,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 14:27:55,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 14:27:55,699 INFO L87 Difference]: Start difference. First operand 4994 states and 5576 transitions. Second operand 5 states. [2018-10-24 14:27:58,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:27:58,799 INFO L93 Difference]: Finished difference Result 11636 states and 13056 transitions. [2018-10-24 14:27:58,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:27:58,801 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 443 [2018-10-24 14:27:58,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:27:58,833 INFO L225 Difference]: With dead ends: 11636 [2018-10-24 14:27:58,833 INFO L226 Difference]: Without dead ends: 6974 [2018-10-24 14:27:58,841 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 443 SyntacticMatches, 1 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 14:27:58,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6974 states. [2018-10-24 14:27:58,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6974 to 6974. [2018-10-24 14:27:58,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6974 states. [2018-10-24 14:27:58,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6974 states to 6974 states and 7573 transitions. [2018-10-24 14:27:58,978 INFO L78 Accepts]: Start accepts. Automaton has 6974 states and 7573 transitions. Word has length 443 [2018-10-24 14:27:58,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:27:58,979 INFO L481 AbstractCegarLoop]: Abstraction has 6974 states and 7573 transitions. [2018-10-24 14:27:58,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 14:27:58,980 INFO L276 IsEmpty]: Start isEmpty. Operand 6974 states and 7573 transitions. [2018-10-24 14:27:59,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 873 [2018-10-24 14:27:59,015 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:27:59,016 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:27:59,016 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:27:59,016 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:27:59,017 INFO L82 PathProgramCache]: Analyzing trace with hash -47706806, now seen corresponding path program 1 times [2018-10-24 14:27:59,017 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:27:59,017 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:27:59,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:27:59,018 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:27:59,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:27:59,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:27:59,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 1071 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2018-10-24 14:27:59,983 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:27:59,983 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:27:59,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:27:59,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:27:59,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:27:59,985 INFO L87 Difference]: Start difference. First operand 6974 states and 7573 transitions. Second operand 4 states. [2018-10-24 14:28:02,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:28:02,567 INFO L93 Difference]: Finished difference Result 16582 states and 18089 transitions. [2018-10-24 14:28:02,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:28:02,567 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 872 [2018-10-24 14:28:02,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:28:02,604 INFO L225 Difference]: With dead ends: 16582 [2018-10-24 14:28:02,604 INFO L226 Difference]: Without dead ends: 9940 [2018-10-24 14:28:02,611 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:28:02,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9940 states. [2018-10-24 14:28:02,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9940 to 9940. [2018-10-24 14:28:02,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9940 states. [2018-10-24 14:28:02,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9940 states to 9940 states and 10636 transitions. [2018-10-24 14:28:02,757 INFO L78 Accepts]: Start accepts. Automaton has 9940 states and 10636 transitions. Word has length 872 [2018-10-24 14:28:02,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:28:02,758 INFO L481 AbstractCegarLoop]: Abstraction has 9940 states and 10636 transitions. [2018-10-24 14:28:02,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:28:02,759 INFO L276 IsEmpty]: Start isEmpty. Operand 9940 states and 10636 transitions. [2018-10-24 14:28:02,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 980 [2018-10-24 14:28:02,807 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:28:02,808 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 14:28:02,809 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:28:02,809 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:28:02,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1651258358, now seen corresponding path program 1 times [2018-10-24 14:28:02,809 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:28:02,809 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:28:02,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:28:02,810 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:28:02,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:28:02,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:28:03,558 WARN L179 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 9 [2018-10-24 14:28:03,738 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 8 [2018-10-24 14:28:04,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1726 backedges. 1189 proven. 131 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2018-10-24 14:28:04,965 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:28:04,965 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 14:28:04,974 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:28:05,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:28:05,189 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:28:06,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1726 backedges. 1121 proven. 0 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2018-10-24 14:28:06,098 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 14:28:06,098 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2018-10-24 14:28:06,099 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-24 14:28:06,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-24 14:28:06,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-10-24 14:28:06,100 INFO L87 Difference]: Start difference. First operand 9940 states and 10636 transitions. Second operand 10 states. [2018-10-24 14:28:12,331 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2018-10-24 14:28:17,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:28:17,791 INFO L93 Difference]: Finished difference Result 34270 states and 36764 transitions. [2018-10-24 14:28:17,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-24 14:28:17,791 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 979 [2018-10-24 14:28:17,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:28:17,843 INFO L225 Difference]: With dead ends: 34270 [2018-10-24 14:28:17,843 INFO L226 Difference]: Without dead ends: 24662 [2018-10-24 14:28:17,857 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1020 GetRequests, 995 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=187, Invalid=463, Unknown=0, NotChecked=0, Total=650 [2018-10-24 14:28:17,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24662 states. [2018-10-24 14:28:18,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24662 to 20835. [2018-10-24 14:28:18,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20835 states. [2018-10-24 14:28:18,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20835 states to 20835 states and 21885 transitions. [2018-10-24 14:28:18,333 INFO L78 Accepts]: Start accepts. Automaton has 20835 states and 21885 transitions. Word has length 979 [2018-10-24 14:28:18,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:28:18,334 INFO L481 AbstractCegarLoop]: Abstraction has 20835 states and 21885 transitions. [2018-10-24 14:28:18,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-24 14:28:18,334 INFO L276 IsEmpty]: Start isEmpty. Operand 20835 states and 21885 transitions. [2018-10-24 14:28:18,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1597 [2018-10-24 14:28:18,384 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:28:18,385 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:28:18,386 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:28:18,386 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:28:18,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1110335701, now seen corresponding path program 1 times [2018-10-24 14:28:18,387 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:28:18,387 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:28:18,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:28:18,388 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:28:18,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:28:18,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:28:20,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 2506 proven. 0 refuted. 0 times theorem prover too weak. 2062 trivial. 0 not checked. [2018-10-24 14:28:20,546 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:28:20,547 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 14:28:20,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 14:28:20,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 14:28:20,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 14:28:20,548 INFO L87 Difference]: Start difference. First operand 20835 states and 21885 transitions. Second operand 3 states. [2018-10-24 14:28:22,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:28:22,470 INFO L93 Difference]: Finished difference Result 49918 states and 52568 transitions. [2018-10-24 14:28:22,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 14:28:22,471 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1596 [2018-10-24 14:28:22,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:28:22,537 INFO L225 Difference]: With dead ends: 49918 [2018-10-24 14:28:22,537 INFO L226 Difference]: Without dead ends: 29415 [2018-10-24 14:28:22,565 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 14:28:22,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29415 states. [2018-10-24 14:28:22,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29415 to 26441. [2018-10-24 14:28:22,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26441 states. [2018-10-24 14:28:22,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26441 states to 26441 states and 27751 transitions. [2018-10-24 14:28:22,983 INFO L78 Accepts]: Start accepts. Automaton has 26441 states and 27751 transitions. Word has length 1596 [2018-10-24 14:28:22,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:28:22,985 INFO L481 AbstractCegarLoop]: Abstraction has 26441 states and 27751 transitions. [2018-10-24 14:28:22,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 14:28:22,985 INFO L276 IsEmpty]: Start isEmpty. Operand 26441 states and 27751 transitions. [2018-10-24 14:28:23,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1606 [2018-10-24 14:28:23,061 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:28:23,062 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:28:23,062 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:28:23,063 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:28:23,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1280177546, now seen corresponding path program 1 times [2018-10-24 14:28:23,064 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:28:23,064 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:28:23,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:28:23,065 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:28:23,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:28:23,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:28:24,417 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-24 14:28:24,857 WARN L179 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 16 [2018-10-24 14:28:27,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4237 backedges. 2916 proven. 2 refuted. 0 times theorem prover too weak. 1319 trivial. 0 not checked. [2018-10-24 14:28:27,989 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:28:27,989 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 14:28:27,996 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:28:28,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:28:28,408 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:28:30,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4237 backedges. 1398 proven. 0 refuted. 0 times theorem prover too weak. 2839 trivial. 0 not checked. [2018-10-24 14:28:30,232 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 14:28:30,232 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2018-10-24 14:28:30,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 14:28:30,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 14:28:30,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-10-24 14:28:30,236 INFO L87 Difference]: Start difference. First operand 26441 states and 27751 transitions. Second operand 9 states. [2018-10-24 14:28:39,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:28:39,100 INFO L93 Difference]: Finished difference Result 54110 states and 56789 transitions. [2018-10-24 14:28:39,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-24 14:28:39,101 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1605 [2018-10-24 14:28:39,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:28:39,143 INFO L225 Difference]: With dead ends: 54110 [2018-10-24 14:28:39,143 INFO L226 Difference]: Without dead ends: 25353 [2018-10-24 14:28:39,173 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1620 GetRequests, 1608 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2018-10-24 14:28:39,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25353 states. [2018-10-24 14:28:39,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25353 to 24321. [2018-10-24 14:28:39,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24321 states. [2018-10-24 14:28:39,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24321 states to 24321 states and 25202 transitions. [2018-10-24 14:28:39,490 INFO L78 Accepts]: Start accepts. Automaton has 24321 states and 25202 transitions. Word has length 1605 [2018-10-24 14:28:39,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:28:39,492 INFO L481 AbstractCegarLoop]: Abstraction has 24321 states and 25202 transitions. [2018-10-24 14:28:39,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-24 14:28:39,492 INFO L276 IsEmpty]: Start isEmpty. Operand 24321 states and 25202 transitions. [2018-10-24 14:28:39,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2191 [2018-10-24 14:28:39,573 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:28:39,575 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:28:39,575 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:28:39,575 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:28:39,576 INFO L82 PathProgramCache]: Analyzing trace with hash 358822258, now seen corresponding path program 1 times [2018-10-24 14:28:39,576 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:28:39,576 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:28:39,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:28:39,577 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:28:39,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:28:39,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:28:41,991 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-24 14:28:47,345 INFO L134 CoverageAnalysis]: Checked inductivity of 8524 backedges. 3808 proven. 251 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2018-10-24 14:28:47,345 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:28:47,345 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 14:28:47,352 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:28:47,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:28:47,878 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:28:48,712 WARN L179 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 18 [2018-10-24 14:28:51,561 INFO L134 CoverageAnalysis]: Checked inductivity of 8524 backedges. 4775 proven. 0 refuted. 0 times theorem prover too weak. 3749 trivial. 0 not checked. [2018-10-24 14:28:51,584 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 14:28:51,585 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2018-10-24 14:28:51,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 14:28:51,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 14:28:51,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-10-24 14:28:51,588 INFO L87 Difference]: Start difference. First operand 24321 states and 25202 transitions. Second operand 9 states. [2018-10-24 14:29:05,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:29:05,548 INFO L93 Difference]: Finished difference Result 53017 states and 55015 transitions. [2018-10-24 14:29:05,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-24 14:29:05,548 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 2190 [2018-10-24 14:29:05,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:29:05,580 INFO L225 Difference]: With dead ends: 53017 [2018-10-24 14:29:05,580 INFO L226 Difference]: Without dead ends: 29028 [2018-10-24 14:29:05,598 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2211 GetRequests, 2194 SyntacticMatches, 7 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2018-10-24 14:29:05,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29028 states. [2018-10-24 14:29:05,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29028 to 28294. [2018-10-24 14:29:05,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28294 states. [2018-10-24 14:29:05,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28294 states to 28294 states and 29075 transitions. [2018-10-24 14:29:05,920 INFO L78 Accepts]: Start accepts. Automaton has 28294 states and 29075 transitions. Word has length 2190 [2018-10-24 14:29:05,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:29:05,921 INFO L481 AbstractCegarLoop]: Abstraction has 28294 states and 29075 transitions. [2018-10-24 14:29:05,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-24 14:29:05,922 INFO L276 IsEmpty]: Start isEmpty. Operand 28294 states and 29075 transitions. [2018-10-24 14:29:05,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2239 [2018-10-24 14:29:05,976 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:29:05,978 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:29:05,978 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:29:05,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:29:05,979 INFO L82 PathProgramCache]: Analyzing trace with hash -54974003, now seen corresponding path program 1 times [2018-10-24 14:29:05,979 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:29:05,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:29:05,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:29:05,980 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:29:05,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:29:06,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:29:07,544 WARN L179 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2018-10-24 14:29:07,919 WARN L179 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 8 [2018-10-24 14:29:10,760 INFO L134 CoverageAnalysis]: Checked inductivity of 9055 backedges. 5818 proven. 0 refuted. 0 times theorem prover too weak. 3237 trivial. 0 not checked. [2018-10-24 14:29:10,761 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:29:10,761 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 14:29:10,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 14:29:10,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 14:29:10,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 14:29:10,763 INFO L87 Difference]: Start difference. First operand 28294 states and 29075 transitions. Second operand 5 states. [2018-10-24 14:29:13,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:29:13,421 INFO L93 Difference]: Finished difference Result 56255 states and 57802 transitions. [2018-10-24 14:29:13,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 14:29:13,421 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 2238 [2018-10-24 14:29:13,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:29:13,452 INFO L225 Difference]: With dead ends: 56255 [2018-10-24 14:29:13,452 INFO L226 Difference]: Without dead ends: 28953 [2018-10-24 14:29:13,469 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 14:29:13,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28953 states. [2018-10-24 14:29:13,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28953 to 28953. [2018-10-24 14:29:13,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28953 states. [2018-10-24 14:29:13,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28953 states to 28953 states and 29645 transitions. [2018-10-24 14:29:13,758 INFO L78 Accepts]: Start accepts. Automaton has 28953 states and 29645 transitions. Word has length 2238 [2018-10-24 14:29:13,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:29:13,759 INFO L481 AbstractCegarLoop]: Abstraction has 28953 states and 29645 transitions. [2018-10-24 14:29:13,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 14:29:13,759 INFO L276 IsEmpty]: Start isEmpty. Operand 28953 states and 29645 transitions. [2018-10-24 14:29:13,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2311 [2018-10-24 14:29:13,796 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:29:13,797 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:29:13,797 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:29:13,797 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:29:13,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1964392900, now seen corresponding path program 1 times [2018-10-24 14:29:13,798 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:29:13,798 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:29:13,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:29:13,799 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:29:13,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:29:14,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:29:18,096 INFO L134 CoverageAnalysis]: Checked inductivity of 9517 backedges. 1270 proven. 0 refuted. 0 times theorem prover too weak. 8247 trivial. 0 not checked. [2018-10-24 14:29:18,096 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:29:18,097 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 14:29:18,098 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 14:29:18,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 14:29:18,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 14:29:18,098 INFO L87 Difference]: Start difference. First operand 28953 states and 29645 transitions. Second operand 5 states. [2018-10-24 14:29:20,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:29:20,812 INFO L93 Difference]: Finished difference Result 61490 states and 63132 transitions. [2018-10-24 14:29:20,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 14:29:20,813 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 2310 [2018-10-24 14:29:20,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:29:20,844 INFO L225 Difference]: With dead ends: 61490 [2018-10-24 14:29:20,844 INFO L226 Difference]: Without dead ends: 33529 [2018-10-24 14:29:20,858 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 14:29:20,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33529 states. [2018-10-24 14:29:21,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33529 to 32207. [2018-10-24 14:29:21,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32207 states. [2018-10-24 14:29:21,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32207 states to 32207 states and 33039 transitions. [2018-10-24 14:29:21,146 INFO L78 Accepts]: Start accepts. Automaton has 32207 states and 33039 transitions. Word has length 2310 [2018-10-24 14:29:21,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:29:21,147 INFO L481 AbstractCegarLoop]: Abstraction has 32207 states and 33039 transitions. [2018-10-24 14:29:21,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 14:29:21,147 INFO L276 IsEmpty]: Start isEmpty. Operand 32207 states and 33039 transitions. [2018-10-24 14:29:21,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2420 [2018-10-24 14:29:21,195 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:29:21,196 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 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, 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] [2018-10-24 14:29:21,196 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:29:21,196 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:29:21,197 INFO L82 PathProgramCache]: Analyzing trace with hash 244229822, now seen corresponding path program 1 times [2018-10-24 14:29:21,197 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:29:21,198 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:29:21,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:29:21,199 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:29:21,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:29:21,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:29:23,737 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-10-24 14:29:31,736 INFO L134 CoverageAnalysis]: Checked inductivity of 10088 backedges. 7204 proven. 1277 refuted. 0 times theorem prover too weak. 1607 trivial. 0 not checked. [2018-10-24 14:29:31,737 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:29:31,737 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 14:29:31,746 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:29:32,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:29:32,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:30:03,643 WARN L179 SmtUtils]: Spent 30.81 s on a formula simplification. DAG size of input: 432 DAG size of output: 28 [2018-10-24 14:30:04,154 WARN L179 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2018-10-24 14:30:11,284 INFO L134 CoverageAnalysis]: Checked inductivity of 10088 backedges. 7461 proven. 386 refuted. 0 times theorem prover too weak. 2241 trivial. 0 not checked. [2018-10-24 14:30:11,317 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 14:30:11,318 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2018-10-24 14:30:11,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-24 14:30:11,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-24 14:30:11,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2018-10-24 14:30:11,323 INFO L87 Difference]: Start difference. First operand 32207 states and 33039 transitions. Second operand 14 states. [2018-10-24 14:30:46,683 WARN L179 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 41 [2018-10-24 14:30:51,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:30:51,852 INFO L93 Difference]: Finished difference Result 87556 states and 89749 transitions. [2018-10-24 14:30:51,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-24 14:30:51,853 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 2419 [2018-10-24 14:30:51,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:30:51,893 INFO L225 Difference]: With dead ends: 87556 [2018-10-24 14:30:51,894 INFO L226 Difference]: Without dead ends: 56341 [2018-10-24 14:30:51,910 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2506 GetRequests, 2449 SyntacticMatches, 8 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 35.8s TimeCoverageRelationStatistics Valid=456, Invalid=2094, Unknown=0, NotChecked=0, Total=2550 [2018-10-24 14:30:51,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56341 states. [2018-10-24 14:30:52,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56341 to 30543. [2018-10-24 14:30:52,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30543 states. [2018-10-24 14:30:52,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30543 states to 30543 states and 31266 transitions. [2018-10-24 14:30:52,221 INFO L78 Accepts]: Start accepts. Automaton has 30543 states and 31266 transitions. Word has length 2419 [2018-10-24 14:30:52,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:30:52,222 INFO L481 AbstractCegarLoop]: Abstraction has 30543 states and 31266 transitions. [2018-10-24 14:30:52,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-24 14:30:52,222 INFO L276 IsEmpty]: Start isEmpty. Operand 30543 states and 31266 transitions. [2018-10-24 14:30:52,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2709 [2018-10-24 14:30:52,283 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:30:52,285 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:30:52,285 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:30:52,285 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:30:52,286 INFO L82 PathProgramCache]: Analyzing trace with hash 707960698, now seen corresponding path program 1 times [2018-10-24 14:30:52,286 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:30:52,286 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:30:52,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:30:52,287 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:30:52,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:30:52,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:30:54,680 WARN L179 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 12 Received shutdown request... [2018-10-24 14:30:58,027 INFO L134 CoverageAnalysis]: Checked inductivity of 13040 backedges. 7832 proven. 48 refuted. 0 times theorem prover too weak. 5160 trivial. 0 not checked. [2018-10-24 14:30:58,028 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:30:58,028 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 14:30:58,045 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:30:58,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:30:58,704 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:30:58,721 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-24 14:30:58,923 WARN L522 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 14:30:58,923 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 14:30:58,928 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 14:30:58,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 02:30:58 BoogieIcfgContainer [2018-10-24 14:30:58,929 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 14:30:58,930 INFO L168 Benchmark]: Toolchain (without parser) took 228546.77 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -624.5 MB). Peak memory consumption was 1.9 GB. Max. memory is 7.1 GB. [2018-10-24 14:30:58,931 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. [2018-10-24 14:30:58,931 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1115.87 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: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. [2018-10-24 14:30:58,932 INFO L168 Benchmark]: Boogie Procedure Inliner took 361.23 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 742.4 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -849.7 MB). Peak memory consumption was 28.6 MB. Max. memory is 7.1 GB. [2018-10-24 14:30:58,933 INFO L168 Benchmark]: Boogie Preprocessor took 176.54 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: 14.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. [2018-10-24 14:30:58,934 INFO L168 Benchmark]: RCFGBuilder took 6545.10 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: 270.3 MB). Peak memory consumption was 270.3 MB. Max. memory is 7.1 GB. [2018-10-24 14:30:58,934 INFO L168 Benchmark]: TraceAbstraction took 220343.33 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 1.9 GB in the beginning and 2.1 GB in the end (delta: -144.1 MB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. [2018-10-24 14:30:58,939 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 1115.87 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: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 361.23 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 742.4 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -849.7 MB). Peak memory consumption was 28.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 176.54 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: 14.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 6545.10 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: 270.3 MB). Peak memory consumption was 270.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 220343.33 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 1.9 GB in the beginning and 2.1 GB in the end (delta: -144.1 MB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 49]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 49). Cancelled while BasicCegarLoop was analyzing trace of length 2709 with TraceHistMax 14,while TraceCheckSpWp was constructing forward predicates,while XnfDer was eliminating 1 quantified variables from 2 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 397 locations, 1 error locations. TIMEOUT Result, 220.2s OverallTime, 15 OverallIterations, 14 TraceHistogramMax, 119.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3453 SDtfs, 18620 SDslu, 2948 SDs, 0 SdLazy, 83336 SolverSat, 4636 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 96.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8171 GetRequests, 8019 SyntacticMatches, 22 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 915 ImplicationChecksByTransitivity, 43.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32207occurred in iteration=13, 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: 3.0s AutomataMinimizationTime, 14 MinimizatonAttempts, 36378 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.7s SsaConstructionTime, 2.7s SatisfiabilityAnalysisTime, 61.9s InterpolantComputationTime, 23597 NumberOfCodeBlocks, 23597 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 23577 ConstructedInterpolants, 282 QuantifiedInterpolants, 164404750 SizeOfPredicates, 8 NumberOfNonLiveVariables, 9197 ConjunctsInSsa, 29 ConjunctsInUnsatCore, 20 InterpolantComputations, 13 PerfectInterpolantSequences, 72681/74801 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown