java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem15_label08_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-0fd1304 [2018-10-23 20:28:28,618 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-23 20:28:28,620 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-23 20:28:28,631 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-23 20:28:28,632 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-23 20:28:28,633 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-23 20:28:28,634 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-23 20:28:28,636 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-23 20:28:28,637 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-23 20:28:28,638 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-23 20:28:28,639 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-23 20:28:28,639 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-23 20:28:28,640 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-23 20:28:28,641 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-23 20:28:28,642 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-23 20:28:28,643 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-23 20:28:28,644 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-23 20:28:28,646 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-23 20:28:28,648 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-23 20:28:28,649 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-23 20:28:28,651 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-23 20:28:28,652 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-23 20:28:28,654 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-23 20:28:28,654 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-23 20:28:28,655 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-23 20:28:28,660 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-23 20:28:28,663 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-23 20:28:28,666 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-23 20:28:28,667 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-23 20:28:28,668 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-23 20:28:28,668 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-23 20:28:28,668 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-23 20:28:28,672 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-23 20:28:28,699 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-23 20:28:28,699 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-23 20:28:28,700 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-23 20:28:28,700 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-23 20:28:28,702 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-23 20:28:28,703 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-23 20:28:28,703 INFO L133 SettingsManager]: * Use SBE=true [2018-10-23 20:28:28,703 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-23 20:28:28,703 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-23 20:28:28,704 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-23 20:28:28,705 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-23 20:28:28,705 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-23 20:28:28,705 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-23 20:28:28,705 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-23 20:28:28,706 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-23 20:28:28,706 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-23 20:28:28,706 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-23 20:28:28,706 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-23 20:28:28,706 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-23 20:28:28,707 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 20:28:28,708 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-23 20:28:28,708 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-23 20:28:28,708 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-23 20:28:28,708 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-23 20:28:28,708 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-23 20:28:28,709 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-23 20:28:28,710 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-23 20:28:28,710 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-23 20:28:28,766 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-23 20:28:28,783 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-23 20:28:28,786 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-23 20:28:28,788 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-23 20:28:28,788 INFO L276 PluginConnector]: CDTParser initialized [2018-10-23 20:28:28,789 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label08_true-unreach-call.c [2018-10-23 20:28:28,845 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/ed9be3a33/aabe1f169fab4175a667bd25648a0554/FLAG80e3a0ddd [2018-10-23 20:28:29,440 INFO L298 CDTParser]: Found 1 translation units. [2018-10-23 20:28:29,441 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label08_true-unreach-call.c [2018-10-23 20:28:29,464 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/ed9be3a33/aabe1f169fab4175a667bd25648a0554/FLAG80e3a0ddd [2018-10-23 20:28:29,483 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/ed9be3a33/aabe1f169fab4175a667bd25648a0554 [2018-10-23 20:28:29,495 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-23 20:28:29,498 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-23 20:28:29,501 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-23 20:28:29,501 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-23 20:28:29,505 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-23 20:28:29,506 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:28:29" (1/1) ... [2018-10-23 20:28:29,510 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bfcf448 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:28:29, skipping insertion in model container [2018-10-23 20:28:29,510 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:28:29" (1/1) ... [2018-10-23 20:28:29,521 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-23 20:28:29,629 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-23 20:28:30,433 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 20:28:30,438 INFO L189 MainTranslator]: Completed pre-run [2018-10-23 20:28:30,749 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 20:28:30,769 INFO L193 MainTranslator]: Completed translation [2018-10-23 20:28:30,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:28:30 WrapperNode [2018-10-23 20:28:30,770 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-23 20:28:30,771 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-23 20:28:30,771 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-23 20:28:30,771 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-23 20:28:30,781 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:28:30" (1/1) ... [2018-10-23 20:28:30,819 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:28:30" (1/1) ... [2018-10-23 20:28:31,157 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-23 20:28:31,158 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-23 20:28:31,158 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-23 20:28:31,158 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-23 20:28:31,171 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:28:30" (1/1) ... [2018-10-23 20:28:31,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:28:30" (1/1) ... [2018-10-23 20:28:31,193 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:28:30" (1/1) ... [2018-10-23 20:28:31,193 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:28:30" (1/1) ... [2018-10-23 20:28:31,289 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:28:30" (1/1) ... [2018-10-23 20:28:31,304 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:28:30" (1/1) ... [2018-10-23 20:28:31,348 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:28:30" (1/1) ... [2018-10-23 20:28:31,387 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-23 20:28:31,388 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-23 20:28:31,388 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-23 20:28:31,388 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-23 20:28:31,389 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:28:30" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 20:28:31,462 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-23 20:28:31,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-23 20:28:31,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-23 20:28:38,780 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-23 20:28:38,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:28:38 BoogieIcfgContainer [2018-10-23 20:28:38,781 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-23 20:28:38,783 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-23 20:28:38,783 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-23 20:28:38,786 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-23 20:28:38,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:28:29" (1/3) ... [2018-10-23 20:28:38,787 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18b63e93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:28:38, skipping insertion in model container [2018-10-23 20:28:38,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:28:30" (2/3) ... [2018-10-23 20:28:38,788 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18b63e93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:28:38, skipping insertion in model container [2018-10-23 20:28:38,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:28:38" (3/3) ... [2018-10-23 20:28:38,790 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label08_true-unreach-call.c [2018-10-23 20:28:38,801 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-23 20:28:38,814 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-23 20:28:38,832 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-23 20:28:38,884 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-23 20:28:38,885 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-23 20:28:38,885 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-23 20:28:38,885 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-23 20:28:38,886 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-23 20:28:38,886 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-23 20:28:38,886 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-23 20:28:38,886 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-23 20:28:38,886 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-23 20:28:38,925 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states. [2018-10-23 20:28:38,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-23 20:28:38,943 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:28:38,946 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:28:38,949 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:28:38,955 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:28:38,956 INFO L82 PathProgramCache]: Analyzing trace with hash -2139005982, now seen corresponding path program 1 times [2018-10-23 20:28:38,958 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:28:38,959 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:28:39,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:28:39,017 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:28:39,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:28:39,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:28:39,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:28:39,458 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:28:39,459 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 20:28:39,464 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:28:39,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:28:39,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:28:39,484 INFO L87 Difference]: Start difference. First operand 425 states. Second operand 4 states. [2018-10-23 20:28:50,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:28:50,083 INFO L93 Difference]: Finished difference Result 1474 states and 2723 transitions. [2018-10-23 20:28:50,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:28:50,086 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2018-10-23 20:28:50,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:28:50,116 INFO L225 Difference]: With dead ends: 1474 [2018-10-23 20:28:50,117 INFO L226 Difference]: Without dead ends: 1042 [2018-10-23 20:28:50,125 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:28:50,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2018-10-23 20:28:50,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 1040. [2018-10-23 20:28:50,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1040 states. [2018-10-23 20:28:50,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 1638 transitions. [2018-10-23 20:28:50,237 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 1638 transitions. Word has length 52 [2018-10-23 20:28:50,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:28:50,238 INFO L481 AbstractCegarLoop]: Abstraction has 1040 states and 1638 transitions. [2018-10-23 20:28:50,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:28:50,238 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 1638 transitions. [2018-10-23 20:28:50,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-23 20:28:50,249 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:28:50,250 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-23 20:28:50,250 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:28:50,250 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:28:50,251 INFO L82 PathProgramCache]: Analyzing trace with hash -2043425283, now seen corresponding path program 1 times [2018-10-23 20:28:50,251 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:28:50,252 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:28:50,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:28:50,254 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:28:50,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:28:50,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:28:50,529 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:28:50,530 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:28:50,530 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:28:50,532 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:28:50,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:28:50,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:28:50,533 INFO L87 Difference]: Start difference. First operand 1040 states and 1638 transitions. Second operand 4 states. [2018-10-23 20:28:58,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:28:58,690 INFO L93 Difference]: Finished difference Result 3887 states and 6230 transitions. [2018-10-23 20:28:58,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:28:58,691 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 118 [2018-10-23 20:28:58,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:28:58,709 INFO L225 Difference]: With dead ends: 3887 [2018-10-23 20:28:58,709 INFO L226 Difference]: Without dead ends: 2849 [2018-10-23 20:28:58,713 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:28:58,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2849 states. [2018-10-23 20:28:58,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2849 to 2844. [2018-10-23 20:28:58,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2844 states. [2018-10-23 20:28:58,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2844 states to 2844 states and 4039 transitions. [2018-10-23 20:28:58,787 INFO L78 Accepts]: Start accepts. Automaton has 2844 states and 4039 transitions. Word has length 118 [2018-10-23 20:28:58,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:28:58,788 INFO L481 AbstractCegarLoop]: Abstraction has 2844 states and 4039 transitions. [2018-10-23 20:28:58,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:28:58,788 INFO L276 IsEmpty]: Start isEmpty. Operand 2844 states and 4039 transitions. [2018-10-23 20:28:58,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2018-10-23 20:28:58,797 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:28:58,798 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:28:58,798 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:28:58,798 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:28:58,798 INFO L82 PathProgramCache]: Analyzing trace with hash -2102953207, now seen corresponding path program 1 times [2018-10-23 20:28:58,799 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:28:58,799 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:28:58,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:28:58,800 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:28:58,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:28:58,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:28:59,337 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 99 proven. 4 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2018-10-23 20:28:59,338 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:28:59,338 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 20:28:59,349 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:28:59,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:28:59,459 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:28:59,595 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 190 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:28:59,630 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 20:28:59,631 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2018-10-23 20:28:59,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:28:59,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:28:59,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:28:59,635 INFO L87 Difference]: Start difference. First operand 2844 states and 4039 transitions. Second operand 4 states. [2018-10-23 20:29:05,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:29:05,994 INFO L93 Difference]: Finished difference Result 10857 states and 15533 transitions. [2018-10-23 20:29:05,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:29:05,995 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 264 [2018-10-23 20:29:05,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:29:06,033 INFO L225 Difference]: With dead ends: 10857 [2018-10-23 20:29:06,034 INFO L226 Difference]: Without dead ends: 8015 [2018-10-23 20:29:06,040 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 264 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:29:06,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8015 states. [2018-10-23 20:29:06,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8015 to 4646. [2018-10-23 20:29:06,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4646 states. [2018-10-23 20:29:06,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4646 states to 4646 states and 6263 transitions. [2018-10-23 20:29:06,145 INFO L78 Accepts]: Start accepts. Automaton has 4646 states and 6263 transitions. Word has length 264 [2018-10-23 20:29:06,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:29:06,146 INFO L481 AbstractCegarLoop]: Abstraction has 4646 states and 6263 transitions. [2018-10-23 20:29:06,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:29:06,147 INFO L276 IsEmpty]: Start isEmpty. Operand 4646 states and 6263 transitions. [2018-10-23 20:29:06,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2018-10-23 20:29:06,152 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:29:06,153 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:29:06,153 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:29:06,153 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:29:06,153 INFO L82 PathProgramCache]: Analyzing trace with hash 147879681, now seen corresponding path program 1 times [2018-10-23 20:29:06,154 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:29:06,154 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:29:06,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:29:06,155 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:29:06,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:29:06,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:29:06,871 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-10-23 20:29:06,871 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:29:06,871 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:29:06,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 20:29:06,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 20:29:06,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:29:06,873 INFO L87 Difference]: Start difference. First operand 4646 states and 6263 transitions. Second operand 5 states. [2018-10-23 20:29:14,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:29:14,454 INFO L93 Difference]: Finished difference Result 11092 states and 14512 transitions. [2018-10-23 20:29:14,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:29:14,455 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 332 [2018-10-23 20:29:14,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:29:14,479 INFO L225 Difference]: With dead ends: 11092 [2018-10-23 20:29:14,479 INFO L226 Difference]: Without dead ends: 6448 [2018-10-23 20:29:14,486 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:29:14,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6448 states. [2018-10-23 20:29:14,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6448 to 6147. [2018-10-23 20:29:14,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6147 states. [2018-10-23 20:29:14,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6147 states to 6147 states and 7862 transitions. [2018-10-23 20:29:14,587 INFO L78 Accepts]: Start accepts. Automaton has 6147 states and 7862 transitions. Word has length 332 [2018-10-23 20:29:14,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:29:14,588 INFO L481 AbstractCegarLoop]: Abstraction has 6147 states and 7862 transitions. [2018-10-23 20:29:14,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 20:29:14,588 INFO L276 IsEmpty]: Start isEmpty. Operand 6147 states and 7862 transitions. [2018-10-23 20:29:14,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2018-10-23 20:29:14,599 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:29:14,599 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:29:14,600 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:29:14,600 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:29:14,600 INFO L82 PathProgramCache]: Analyzing trace with hash -2100025585, now seen corresponding path program 1 times [2018-10-23 20:29:14,600 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:29:14,600 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:29:14,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:29:14,602 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:29:14,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:29:14,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:29:15,122 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 179 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:29:15,123 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:29:15,123 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:29:15,124 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:29:15,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:29:15,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:29:15,124 INFO L87 Difference]: Start difference. First operand 6147 states and 7862 transitions. Second operand 4 states. [2018-10-23 20:29:23,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:29:23,841 INFO L93 Difference]: Finished difference Result 15598 states and 20336 transitions. [2018-10-23 20:29:23,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:29:23,842 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 406 [2018-10-23 20:29:23,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:29:23,880 INFO L225 Difference]: With dead ends: 15598 [2018-10-23 20:29:23,881 INFO L226 Difference]: Without dead ends: 9453 [2018-10-23 20:29:23,887 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:29:23,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9453 states. [2018-10-23 20:29:24,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9453 to 9150. [2018-10-23 20:29:24,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9150 states. [2018-10-23 20:29:24,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9150 states to 9150 states and 11448 transitions. [2018-10-23 20:29:24,036 INFO L78 Accepts]: Start accepts. Automaton has 9150 states and 11448 transitions. Word has length 406 [2018-10-23 20:29:24,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:29:24,036 INFO L481 AbstractCegarLoop]: Abstraction has 9150 states and 11448 transitions. [2018-10-23 20:29:24,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:29:24,037 INFO L276 IsEmpty]: Start isEmpty. Operand 9150 states and 11448 transitions. [2018-10-23 20:29:24,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2018-10-23 20:29:24,054 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:29:24,055 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-23 20:29:24,055 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:29:24,055 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:29:24,055 INFO L82 PathProgramCache]: Analyzing trace with hash 593964008, now seen corresponding path program 1 times [2018-10-23 20:29:24,056 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:29:24,056 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:29:24,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:29:24,057 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:29:24,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:29:24,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:29:24,872 WARN L179 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 13 [2018-10-23 20:29:25,195 WARN L179 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 13 [2018-10-23 20:29:25,563 WARN L179 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 14 [2018-10-23 20:29:26,116 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 418 proven. 4 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-10-23 20:29:26,116 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:29:26,116 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 20:29:26,125 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:29:26,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:29:26,261 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:29:26,556 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 381 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2018-10-23 20:29:26,578 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 20:29:26,579 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2018-10-23 20:29:26,581 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-23 20:29:26,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-23 20:29:26,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-10-23 20:29:26,584 INFO L87 Difference]: Start difference. First operand 9150 states and 11448 transitions. Second operand 8 states. [2018-10-23 20:29:34,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:29:34,345 INFO L93 Difference]: Finished difference Result 22668 states and 27579 transitions. [2018-10-23 20:29:34,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-23 20:29:34,346 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 482 [2018-10-23 20:29:34,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:29:34,368 INFO L225 Difference]: With dead ends: 22668 [2018-10-23 20:29:34,369 INFO L226 Difference]: Without dead ends: 9445 [2018-10-23 20:29:34,381 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 485 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-10-23 20:29:34,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9445 states. [2018-10-23 20:29:34,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9445 to 9145. [2018-10-23 20:29:34,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9145 states. [2018-10-23 20:29:34,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9145 states to 9145 states and 10683 transitions. [2018-10-23 20:29:34,641 INFO L78 Accepts]: Start accepts. Automaton has 9145 states and 10683 transitions. Word has length 482 [2018-10-23 20:29:34,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:29:34,642 INFO L481 AbstractCegarLoop]: Abstraction has 9145 states and 10683 transitions. [2018-10-23 20:29:34,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-23 20:29:34,642 INFO L276 IsEmpty]: Start isEmpty. Operand 9145 states and 10683 transitions. [2018-10-23 20:29:34,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 559 [2018-10-23 20:29:34,662 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:29:34,663 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-10-23 20:29:34,663 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:29:34,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:29:34,664 INFO L82 PathProgramCache]: Analyzing trace with hash 404113246, now seen corresponding path program 1 times [2018-10-23 20:29:34,664 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:29:34,664 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:29:34,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:29:34,669 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:29:34,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:29:34,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:29:35,322 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-10-23 20:29:35,924 WARN L179 SmtUtils]: Spent 553.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 21 [2018-10-23 20:29:36,185 WARN L179 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 22 [2018-10-23 20:29:37,178 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 315 proven. 136 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2018-10-23 20:29:37,179 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:29:37,179 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 20:29:37,195 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:29:37,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:29:37,348 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:29:37,662 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 383 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-10-23 20:29:37,694 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 20:29:37,695 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2018-10-23 20:29:37,696 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-23 20:29:37,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-23 20:29:37,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-23 20:29:37,699 INFO L87 Difference]: Start difference. First operand 9145 states and 10683 transitions. Second operand 9 states. [2018-10-23 20:29:46,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:29:46,353 INFO L93 Difference]: Finished difference Result 18706 states and 21787 transitions. [2018-10-23 20:29:46,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-23 20:29:46,362 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 558 [2018-10-23 20:29:46,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:29:46,387 INFO L225 Difference]: With dead ends: 18706 [2018-10-23 20:29:46,388 INFO L226 Difference]: Without dead ends: 9563 [2018-10-23 20:29:46,397 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 577 GetRequests, 562 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-10-23 20:29:46,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9563 states. [2018-10-23 20:29:46,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9563 to 9141. [2018-10-23 20:29:46,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9141 states. [2018-10-23 20:29:46,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9141 states to 9141 states and 10091 transitions. [2018-10-23 20:29:46,516 INFO L78 Accepts]: Start accepts. Automaton has 9141 states and 10091 transitions. Word has length 558 [2018-10-23 20:29:46,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:29:46,517 INFO L481 AbstractCegarLoop]: Abstraction has 9141 states and 10091 transitions. [2018-10-23 20:29:46,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-23 20:29:46,517 INFO L276 IsEmpty]: Start isEmpty. Operand 9141 states and 10091 transitions. [2018-10-23 20:29:46,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 597 [2018-10-23 20:29:46,538 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:29:46,539 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-23 20:29:46,540 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:29:46,541 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:29:46,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1175997957, now seen corresponding path program 1 times [2018-10-23 20:29:46,541 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:29:46,541 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:29:46,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:29:46,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:29:46,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:29:46,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:29:48,111 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 149 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2018-10-23 20:29:48,112 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:29:48,112 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 20:29:48,121 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:29:48,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:29:48,267 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:29:49,305 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 149 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2018-10-23 20:29:49,326 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 20:29:49,326 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2018-10-23 20:29:49,327 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-23 20:29:49,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-23 20:29:49,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-10-23 20:29:49,328 INFO L87 Difference]: Start difference. First operand 9141 states and 10091 transitions. Second operand 7 states. [2018-10-23 20:30:00,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:30:00,889 INFO L93 Difference]: Finished difference Result 35300 states and 39221 transitions. [2018-10-23 20:30:00,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-23 20:30:00,890 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 596 [2018-10-23 20:30:00,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:30:00,938 INFO L225 Difference]: With dead ends: 35300 [2018-10-23 20:30:00,938 INFO L226 Difference]: Without dead ends: 26161 [2018-10-23 20:30:00,947 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 599 GetRequests, 594 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-10-23 20:30:00,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26161 states. [2018-10-23 20:30:01,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26161 to 14285. [2018-10-23 20:30:01,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14285 states. [2018-10-23 20:30:01,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14285 states to 14285 states and 15414 transitions. [2018-10-23 20:30:01,204 INFO L78 Accepts]: Start accepts. Automaton has 14285 states and 15414 transitions. Word has length 596 [2018-10-23 20:30:01,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:30:01,205 INFO L481 AbstractCegarLoop]: Abstraction has 14285 states and 15414 transitions. [2018-10-23 20:30:01,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-23 20:30:01,205 INFO L276 IsEmpty]: Start isEmpty. Operand 14285 states and 15414 transitions. [2018-10-23 20:30:01,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 618 [2018-10-23 20:30:01,215 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:30:01,215 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:30:01,216 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:30:01,216 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:30:01,216 INFO L82 PathProgramCache]: Analyzing trace with hash -470184576, now seen corresponding path program 1 times [2018-10-23 20:30:01,216 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:30:01,217 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:30:01,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:30:01,218 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:30:01,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:30:01,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:30:01,890 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 442 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-10-23 20:30:01,890 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:30:01,891 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 20:30:01,891 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 20:30:01,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 20:30:01,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 20:30:01,892 INFO L87 Difference]: Start difference. First operand 14285 states and 15414 transitions. Second operand 3 states. [2018-10-23 20:30:04,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:30:04,662 INFO L93 Difference]: Finished difference Result 30322 states and 32681 transitions. [2018-10-23 20:30:04,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 20:30:04,663 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 617 [2018-10-23 20:30:04,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:30:04,684 INFO L225 Difference]: With dead ends: 30322 [2018-10-23 20:30:04,684 INFO L226 Difference]: Without dead ends: 11785 [2018-10-23 20:30:04,702 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 20:30:04,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11785 states. [2018-10-23 20:30:04,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11785 to 7563. [2018-10-23 20:30:04,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7563 states. [2018-10-23 20:30:04,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7563 states to 7563 states and 7885 transitions. [2018-10-23 20:30:04,822 INFO L78 Accepts]: Start accepts. Automaton has 7563 states and 7885 transitions. Word has length 617 [2018-10-23 20:30:04,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:30:04,822 INFO L481 AbstractCegarLoop]: Abstraction has 7563 states and 7885 transitions. [2018-10-23 20:30:04,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 20:30:04,824 INFO L276 IsEmpty]: Start isEmpty. Operand 7563 states and 7885 transitions. [2018-10-23 20:30:04,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 728 [2018-10-23 20:30:04,834 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:30:04,835 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:30:04,835 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:30:04,835 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:30:04,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1410963826, now seen corresponding path program 1 times [2018-10-23 20:30:04,836 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:30:04,836 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:30:04,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:30:04,838 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:30:04,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:30:04,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:30:07,160 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 477 proven. 50 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-10-23 20:30:07,161 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:30:07,161 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 20:30:07,168 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:30:07,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:30:07,349 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:30:07,932 WARN L179 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2018-10-23 20:30:08,239 WARN L179 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2018-10-23 20:30:09,821 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 477 proven. 50 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-10-23 20:30:09,842 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 20:30:09,843 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 13 [2018-10-23 20:30:09,844 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-23 20:30:09,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-23 20:30:09,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2018-10-23 20:30:09,844 INFO L87 Difference]: Start difference. First operand 7563 states and 7885 transitions. Second operand 13 states. [2018-10-23 20:30:22,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:30:22,556 INFO L93 Difference]: Finished difference Result 25613 states and 26764 transitions. [2018-10-23 20:30:22,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-23 20:30:22,556 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 727 [2018-10-23 20:30:22,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:30:22,573 INFO L225 Difference]: With dead ends: 25613 [2018-10-23 20:30:22,573 INFO L226 Difference]: Without dead ends: 17750 [2018-10-23 20:30:22,581 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 765 GetRequests, 736 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=279, Invalid=533, Unknown=0, NotChecked=0, Total=812 [2018-10-23 20:30:22,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17750 states. [2018-10-23 20:30:22,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17750 to 10864. [2018-10-23 20:30:22,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10864 states. [2018-10-23 20:30:22,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10864 states to 10864 states and 11238 transitions. [2018-10-23 20:30:22,753 INFO L78 Accepts]: Start accepts. Automaton has 10864 states and 11238 transitions. Word has length 727 [2018-10-23 20:30:22,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:30:22,754 INFO L481 AbstractCegarLoop]: Abstraction has 10864 states and 11238 transitions. [2018-10-23 20:30:22,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-23 20:30:22,754 INFO L276 IsEmpty]: Start isEmpty. Operand 10864 states and 11238 transitions. [2018-10-23 20:30:22,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 826 [2018-10-23 20:30:22,770 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:30:22,771 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:30:22,771 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:30:22,771 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:30:22,771 INFO L82 PathProgramCache]: Analyzing trace with hash 403974983, now seen corresponding path program 1 times [2018-10-23 20:30:22,771 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:30:22,772 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:30:22,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:30:22,775 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:30:22,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:30:22,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:30:23,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1052 backedges. 813 proven. 0 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2018-10-23 20:30:23,447 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:30:23,447 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:30:23,448 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:30:23,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:30:23,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:30:23,449 INFO L87 Difference]: Start difference. First operand 10864 states and 11238 transitions. Second operand 4 states. [2018-10-23 20:30:27,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:30:27,561 INFO L93 Difference]: Finished difference Result 21426 states and 22172 transitions. [2018-10-23 20:30:27,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:30:27,561 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 825 [2018-10-23 20:30:27,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:30:27,569 INFO L225 Difference]: With dead ends: 21426 [2018-10-23 20:30:27,570 INFO L226 Difference]: Without dead ends: 10561 [2018-10-23 20:30:27,575 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:30:27,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10561 states. [2018-10-23 20:30:27,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10561 to 10561. [2018-10-23 20:30:27,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10561 states. [2018-10-23 20:30:27,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10561 states to 10561 states and 10862 transitions. [2018-10-23 20:30:27,690 INFO L78 Accepts]: Start accepts. Automaton has 10561 states and 10862 transitions. Word has length 825 [2018-10-23 20:30:27,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:30:27,691 INFO L481 AbstractCegarLoop]: Abstraction has 10561 states and 10862 transitions. [2018-10-23 20:30:27,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:30:27,691 INFO L276 IsEmpty]: Start isEmpty. Operand 10561 states and 10862 transitions. [2018-10-23 20:30:27,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 827 [2018-10-23 20:30:27,701 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:30:27,702 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:30:27,702 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:30:27,702 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:30:27,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1053157093, now seen corresponding path program 1 times [2018-10-23 20:30:27,703 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:30:27,703 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:30:27,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:30:27,704 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:30:27,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:30:27,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:30:28,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1049 backedges. 199 proven. 0 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2018-10-23 20:30:28,812 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:30:28,813 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 20:30:28,818 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 20:30:28,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 20:30:28,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 20:30:28,819 INFO L87 Difference]: Start difference. First operand 10561 states and 10862 transitions. Second operand 3 states. [2018-10-23 20:30:31,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:30:31,037 INFO L93 Difference]: Finished difference Result 23220 states and 23882 transitions. [2018-10-23 20:30:31,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 20:30:31,037 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 826 [2018-10-23 20:30:31,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:30:31,050 INFO L225 Difference]: With dead ends: 23220 [2018-10-23 20:30:31,051 INFO L226 Difference]: Without dead ends: 12659 [2018-10-23 20:30:31,058 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 20:30:31,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12659 states. [2018-10-23 20:30:31,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12659 to 11453. [2018-10-23 20:30:31,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11453 states. [2018-10-23 20:30:31,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11453 states to 11453 states and 11742 transitions. [2018-10-23 20:30:31,192 INFO L78 Accepts]: Start accepts. Automaton has 11453 states and 11742 transitions. Word has length 826 [2018-10-23 20:30:31,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:30:31,193 INFO L481 AbstractCegarLoop]: Abstraction has 11453 states and 11742 transitions. [2018-10-23 20:30:31,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 20:30:31,193 INFO L276 IsEmpty]: Start isEmpty. Operand 11453 states and 11742 transitions. [2018-10-23 20:30:31,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 893 [2018-10-23 20:30:31,206 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:30:31,207 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:30:31,207 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:30:31,207 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:30:31,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1939654473, now seen corresponding path program 1 times [2018-10-23 20:30:31,208 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:30:31,208 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:30:31,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:30:31,209 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:30:31,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:30:31,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:30:31,763 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 3 [2018-10-23 20:30:32,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1090 backedges. 690 proven. 0 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2018-10-23 20:30:32,240 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:30:32,240 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 20:30:32,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 20:30:32,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 20:30:32,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 20:30:32,242 INFO L87 Difference]: Start difference. First operand 11453 states and 11742 transitions. Second operand 3 states. [2018-10-23 20:30:34,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:30:34,249 INFO L93 Difference]: Finished difference Result 27110 states and 27816 transitions. [2018-10-23 20:30:34,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 20:30:34,250 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 892 [2018-10-23 20:30:34,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:30:34,263 INFO L225 Difference]: With dead ends: 27110 [2018-10-23 20:30:34,264 INFO L226 Difference]: Without dead ends: 15959 [2018-10-23 20:30:34,271 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 20:30:34,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15959 states. [2018-10-23 20:30:34,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15959 to 13550. [2018-10-23 20:30:34,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13550 states. [2018-10-23 20:30:34,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13550 states to 13550 states and 13882 transitions. [2018-10-23 20:30:34,431 INFO L78 Accepts]: Start accepts. Automaton has 13550 states and 13882 transitions. Word has length 892 [2018-10-23 20:30:34,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:30:34,431 INFO L481 AbstractCegarLoop]: Abstraction has 13550 states and 13882 transitions. [2018-10-23 20:30:34,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 20:30:34,432 INFO L276 IsEmpty]: Start isEmpty. Operand 13550 states and 13882 transitions. [2018-10-23 20:30:34,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 978 [2018-10-23 20:30:34,450 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:30:34,450 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:30:34,450 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:30:34,451 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:30:34,451 INFO L82 PathProgramCache]: Analyzing trace with hash 2071518071, now seen corresponding path program 1 times [2018-10-23 20:30:34,451 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:30:34,451 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:30:34,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:30:34,452 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:30:34,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:30:34,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:30:35,482 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-10-23 20:30:36,063 WARN L179 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 21 [2018-10-23 20:30:36,689 WARN L179 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 22 [2018-10-23 20:30:37,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1258 backedges. 658 proven. 303 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2018-10-23 20:30:37,853 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:30:37,853 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 20:30:37,861 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:30:38,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:30:38,119 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:30:39,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1258 backedges. 775 proven. 50 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2018-10-23 20:30:39,256 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 20:30:39,256 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4] total 11 [2018-10-23 20:30:39,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-23 20:30:39,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-23 20:30:39,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-10-23 20:30:39,258 INFO L87 Difference]: Start difference. First operand 13550 states and 13882 transitions. Second operand 11 states. [2018-10-23 20:30:49,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:30:49,166 INFO L93 Difference]: Finished difference Result 32123 states and 32897 transitions. [2018-10-23 20:30:49,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-23 20:30:49,167 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 977 [2018-10-23 20:30:49,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:30:49,187 INFO L225 Difference]: With dead ends: 32123 [2018-10-23 20:30:49,187 INFO L226 Difference]: Without dead ends: 18575 [2018-10-23 20:30:49,198 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1021 GetRequests, 991 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=171, Invalid=479, Unknown=0, NotChecked=0, Total=650 [2018-10-23 20:30:49,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18575 states. [2018-10-23 20:30:49,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18575 to 14450. [2018-10-23 20:30:49,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14450 states. [2018-10-23 20:30:49,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14450 states to 14450 states and 14796 transitions. [2018-10-23 20:30:49,366 INFO L78 Accepts]: Start accepts. Automaton has 14450 states and 14796 transitions. Word has length 977 [2018-10-23 20:30:49,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:30:49,366 INFO L481 AbstractCegarLoop]: Abstraction has 14450 states and 14796 transitions. [2018-10-23 20:30:49,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-23 20:30:49,366 INFO L276 IsEmpty]: Start isEmpty. Operand 14450 states and 14796 transitions. [2018-10-23 20:30:49,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 994 [2018-10-23 20:30:49,385 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:30:49,385 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:30:49,386 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:30:49,386 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:30:49,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1315706566, now seen corresponding path program 1 times [2018-10-23 20:30:49,386 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:30:49,386 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:30:49,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:30:49,387 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:30:49,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:30:49,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:30:50,488 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-10-23 20:30:50,682 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2018-10-23 20:30:50,935 WARN L179 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2018-10-23 20:30:54,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1307 backedges. 879 proven. 321 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-10-23 20:30:54,765 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:30:54,765 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 [2018-10-23 20:30:54,773 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:30:55,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:30:55,034 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:30:56,193 WARN L179 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 35 DAG size of output: 15 [2018-10-23 20:30:58,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1307 backedges. 791 proven. 50 refuted. 0 times theorem prover too weak. 466 trivial. 0 not checked. [2018-10-23 20:30:58,513 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 20:30:58,513 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 4] total 21 [2018-10-23 20:30:58,514 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-23 20:30:58,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-23 20:30:58,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2018-10-23 20:30:58,515 INFO L87 Difference]: Start difference. First operand 14450 states and 14796 transitions. Second operand 21 states. [2018-10-23 20:30:59,520 WARN L179 SmtUtils]: Spent 970.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2018-10-23 20:31:03,352 WARN L179 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2018-10-23 20:31:11,957 WARN L179 SmtUtils]: Spent 988.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2018-10-23 20:31:13,066 WARN L179 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2018-10-23 20:31:18,276 WARN L179 SmtUtils]: Spent 682.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2018-10-23 20:31:19,445 WARN L179 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2018-10-23 20:31:20,648 WARN L179 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2018-10-23 20:31:21,245 WARN L179 SmtUtils]: Spent 489.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2018-10-23 20:31:22,691 WARN L179 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2018-10-23 20:31:26,174 WARN L179 SmtUtils]: Spent 2.36 s on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2018-10-23 20:31:29,056 WARN L179 SmtUtils]: Spent 679.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2018-10-23 20:31:40,301 WARN L179 SmtUtils]: Spent 495.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2018-10-23 20:31:41,317 WARN L179 SmtUtils]: Spent 754.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2018-10-23 20:31:42,655 WARN L179 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2018-10-23 20:31:45,462 WARN L179 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2018-10-23 20:31:48,043 WARN L179 SmtUtils]: Spent 578.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2018-10-23 20:31:49,512 WARN L179 SmtUtils]: Spent 992.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2018-10-23 20:31:50,598 WARN L179 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2018-10-23 20:31:57,774 WARN L179 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2018-10-23 20:31:59,426 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2018-10-23 20:32:00,000 WARN L179 SmtUtils]: Spent 547.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2018-10-23 20:32:01,709 WARN L179 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2018-10-23 20:32:04,009 WARN L179 SmtUtils]: Spent 984.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2018-10-23 20:32:13,134 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 29 [2018-10-23 20:32:16,716 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2018-10-23 20:32:19,915 WARN L179 SmtUtils]: Spent 956.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2018-10-23 20:32:20,569 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2018-10-23 20:32:22,828 WARN L179 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2018-10-23 20:32:23,954 WARN L179 SmtUtils]: Spent 651.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 Received shutdown request... [2018-10-23 20:32:29,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-23 20:32:29,932 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-23 20:32:29,938 WARN L205 ceAbstractionStarter]: Timeout [2018-10-23 20:32:29,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 08:32:29 BoogieIcfgContainer [2018-10-23 20:32:29,939 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-23 20:32:29,939 INFO L168 Benchmark]: Toolchain (without parser) took 240443.68 ms. Allocated memory was 1.5 GB in the beginning and 4.2 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 1.9 GB in the end (delta: -506.0 MB). Peak memory consumption was 2.1 GB. Max. memory is 7.1 GB. [2018-10-23 20:32:29,941 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-23 20:32:29,941 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1269.64 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 105.7 MB). Peak memory consumption was 105.7 MB. Max. memory is 7.1 GB. [2018-10-23 20:32:29,942 INFO L168 Benchmark]: Boogie Procedure Inliner took 386.84 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 774.4 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -890.0 MB). Peak memory consumption was 33.3 MB. Max. memory is 7.1 GB. [2018-10-23 20:32:29,942 INFO L168 Benchmark]: Boogie Preprocessor took 229.55 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 27.2 MB). Peak memory consumption was 27.2 MB. Max. memory is 7.1 GB. [2018-10-23 20:32:29,943 INFO L168 Benchmark]: RCFGBuilder took 7393.71 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: 314.0 MB). Peak memory consumption was 314.0 MB. Max. memory is 7.1 GB. [2018-10-23 20:32:29,944 INFO L168 Benchmark]: TraceAbstraction took 231156.20 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.8 GB). Free memory was 1.9 GB in the beginning and 1.9 GB in the end (delta: -63.1 MB). Peak memory consumption was 1.8 GB. Max. memory is 7.1 GB. [2018-10-23 20:32:29,948 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 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 1269.64 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 105.7 MB). Peak memory consumption was 105.7 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 386.84 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 774.4 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -890.0 MB). Peak memory consumption was 33.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 229.55 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 27.2 MB). Peak memory consumption was 27.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 7393.71 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: 314.0 MB). Peak memory consumption was 314.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 231156.20 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.8 GB). Free memory was 1.9 GB in the beginning and 1.9 GB in the end (delta: -63.1 MB). Peak memory consumption was 1.8 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 160]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 160). Cancelled while BasicCegarLoop was constructing difference of abstraction (14450states) and FLOYD_HOARE automaton (currently 93 states, 21 states before enhancement),while ReachableStatesComputation was computing reachable states (25239 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 425 locations, 1 error locations. TIMEOUT Result, 231.0s OverallTime, 15 OverallIterations, 5 TraceHistogramMax, 195.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3724 SDtfs, 33417 SDslu, 3439 SDs, 0 SdLazy, 75313 SolverSat, 6541 SolverUnsat, 24 SolverUnknown, 0 SolverNotchecked, 147.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4919 GetRequests, 4699 SyntacticMatches, 23 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4354 ImplicationChecksByTransitivity, 37.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=14450occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 2.0s AutomataMinimizationTime, 14 MinimizatonAttempts, 35426 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 20.6s InterpolantComputationTime, 13262 NumberOfCodeBlocks, 13262 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 13240 ConstructedInterpolants, 398 QuantifiedInterpolants, 59504042 SizeOfPredicates, 9 NumberOfNonLiveVariables, 5365 ConjunctsInSsa, 35 ConjunctsInUnsatCore, 22 InterpolantComputations, 11 PerfectInterpolantSequences, 12581/13847 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown