java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label05_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-26 21:48:38,712 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 21:48:38,714 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 21:48:38,726 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 21:48:38,726 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 21:48:38,727 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 21:48:38,728 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 21:48:38,730 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 21:48:38,732 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 21:48:38,733 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 21:48:38,733 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 21:48:38,734 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 21:48:38,735 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 21:48:38,736 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 21:48:38,737 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 21:48:38,738 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 21:48:38,739 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 21:48:38,740 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 21:48:38,742 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 21:48:38,744 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 21:48:38,745 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 21:48:38,746 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 21:48:38,749 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-26 21:48:38,749 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-26 21:48:38,749 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-26 21:48:38,750 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-26 21:48:38,751 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-26 21:48:38,752 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-26 21:48:38,753 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-26 21:48:38,754 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-26 21:48:38,754 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-26 21:48:38,755 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-26 21:48:38,757 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 [2018-10-26 21:48:38,773 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 21:48:38,773 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 21:48:38,774 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 21:48:38,774 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-26 21:48:38,775 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-26 21:48:38,775 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-26 21:48:38,775 INFO L133 SettingsManager]: * Use SBE=true [2018-10-26 21:48:38,775 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 21:48:38,776 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 21:48:38,776 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 21:48:38,776 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 21:48:38,776 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 21:48:38,776 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 21:48:38,777 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 21:48:38,777 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 21:48:38,777 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 21:48:38,777 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 21:48:38,777 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 21:48:38,778 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 21:48:38,778 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 21:48:38,778 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 21:48:38,778 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 21:48:38,778 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 21:48:38,779 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-26 21:48:38,779 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 21:48:38,779 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 21:48:38,779 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-26 21:48:38,779 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-26 21:48:38,822 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 21:48:38,838 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 21:48:38,842 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 21:48:38,843 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 21:48:38,844 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 21:48:38,845 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label05_true-unreach-call.c [2018-10-26 21:48:38,904 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/d6b4580b5/a5f2de60cc104ad2b28373822a158586/FLAGcfdd34f11 [2018-10-26 21:48:39,611 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 21:48:39,612 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label05_true-unreach-call.c [2018-10-26 21:48:39,639 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/d6b4580b5/a5f2de60cc104ad2b28373822a158586/FLAGcfdd34f11 [2018-10-26 21:48:39,655 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/d6b4580b5/a5f2de60cc104ad2b28373822a158586 [2018-10-26 21:48:39,667 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 21:48:39,669 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-26 21:48:39,670 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 21:48:39,670 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 21:48:39,674 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 21:48:39,676 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:48:39" (1/1) ... [2018-10-26 21:48:39,679 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27751410 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:48:39, skipping insertion in model container [2018-10-26 21:48:39,679 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:48:39" (1/1) ... [2018-10-26 21:48:39,690 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 21:48:39,798 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 21:48:40,820 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 21:48:40,825 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 21:48:41,253 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 21:48:41,276 INFO L193 MainTranslator]: Completed translation [2018-10-26 21:48:41,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:48:41 WrapperNode [2018-10-26 21:48:41,277 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 21:48:41,279 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-26 21:48:41,279 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-26 21:48:41,279 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-26 21:48:41,290 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:48:41" (1/1) ... [2018-10-26 21:48:41,333 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:48:41" (1/1) ... [2018-10-26 21:48:41,779 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-26 21:48:41,779 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 21:48:41,779 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 21:48:41,780 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 21:48:41,791 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:48:41" (1/1) ... [2018-10-26 21:48:41,791 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:48:41" (1/1) ... [2018-10-26 21:48:41,815 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:48:41" (1/1) ... [2018-10-26 21:48:41,815 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:48:41" (1/1) ... [2018-10-26 21:48:41,943 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:48:41" (1/1) ... [2018-10-26 21:48:41,990 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:48:41" (1/1) ... [2018-10-26 21:48:42,062 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:48:41" (1/1) ... [2018-10-26 21:48:42,155 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 21:48:42,156 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 21:48:42,156 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 21:48:42,156 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 21:48:42,157 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:48:41" (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 [2018-10-26 21:48:42,230 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-26 21:48:42,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 21:48:42,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 21:48:51,511 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 21:48:51,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:48:51 BoogieIcfgContainer [2018-10-26 21:48:51,512 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 21:48:51,514 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 21:48:51,514 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 21:48:51,524 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 21:48:51,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 09:48:39" (1/3) ... [2018-10-26 21:48:51,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bdbd8bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:48:51, skipping insertion in model container [2018-10-26 21:48:51,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:48:41" (2/3) ... [2018-10-26 21:48:51,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bdbd8bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:48:51, skipping insertion in model container [2018-10-26 21:48:51,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:48:51" (3/3) ... [2018-10-26 21:48:51,530 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label05_true-unreach-call.c [2018-10-26 21:48:51,541 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 21:48:51,551 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 21:48:51,566 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 21:48:51,618 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-26 21:48:51,621 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 21:48:51,621 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 21:48:51,622 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 21:48:51,622 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 21:48:51,622 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 21:48:51,622 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 21:48:51,623 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 21:48:51,623 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 21:48:51,667 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states. [2018-10-26 21:48:51,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-26 21:48:51,688 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:48:51,689 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:48:51,692 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:48:51,697 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:48:51,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1515441142, now seen corresponding path program 1 times [2018-10-26 21:48:51,700 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:48:51,700 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:48:51,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:48:51,760 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:48:51,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:48:51,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:48:52,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:48:52,245 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:48:52,246 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 21:48:52,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 21:48:52,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 21:48:52,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:48:52,270 INFO L87 Difference]: Start difference. First operand 591 states. Second operand 4 states. [2018-10-26 21:49:01,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:49:01,800 INFO L93 Difference]: Finished difference Result 2126 states and 3956 transitions. [2018-10-26 21:49:01,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 21:49:01,803 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 62 [2018-10-26 21:49:01,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:49:01,840 INFO L225 Difference]: With dead ends: 2126 [2018-10-26 21:49:01,840 INFO L226 Difference]: Without dead ends: 1528 [2018-10-26 21:49:01,848 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 [2018-10-26 21:49:01,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1528 states. [2018-10-26 21:49:01,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1528 to 1048. [2018-10-26 21:49:01,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1048 states. [2018-10-26 21:49:01,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 1826 transitions. [2018-10-26 21:49:01,990 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 1826 transitions. Word has length 62 [2018-10-26 21:49:01,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:49:01,990 INFO L481 AbstractCegarLoop]: Abstraction has 1048 states and 1826 transitions. [2018-10-26 21:49:01,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 21:49:01,991 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 1826 transitions. [2018-10-26 21:49:02,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-26 21:49:02,001 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:49:02,002 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:49:02,002 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:49:02,003 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:49:02,003 INFO L82 PathProgramCache]: Analyzing trace with hash 606696408, now seen corresponding path program 1 times [2018-10-26 21:49:02,003 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:49:02,003 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:49:02,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:49:02,004 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:49:02,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:49:02,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:49:02,277 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:49:02,277 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:49:02,278 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 21:49:02,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 21:49:02,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 21:49:02,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:49:02,280 INFO L87 Difference]: Start difference. First operand 1048 states and 1826 transitions. Second operand 4 states. [2018-10-26 21:49:11,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:49:11,787 INFO L93 Difference]: Finished difference Result 3810 states and 6822 transitions. [2018-10-26 21:49:11,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 21:49:11,788 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 134 [2018-10-26 21:49:11,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:49:11,804 INFO L225 Difference]: With dead ends: 3810 [2018-10-26 21:49:11,805 INFO L226 Difference]: Without dead ends: 2764 [2018-10-26 21:49:11,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:49:11,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2764 states. [2018-10-26 21:49:11,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2764 to 2764. [2018-10-26 21:49:11,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2764 states. [2018-10-26 21:49:11,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2764 states to 2764 states and 4043 transitions. [2018-10-26 21:49:11,866 INFO L78 Accepts]: Start accepts. Automaton has 2764 states and 4043 transitions. Word has length 134 [2018-10-26 21:49:11,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:49:11,866 INFO L481 AbstractCegarLoop]: Abstraction has 2764 states and 4043 transitions. [2018-10-26 21:49:11,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 21:49:11,867 INFO L276 IsEmpty]: Start isEmpty. Operand 2764 states and 4043 transitions. [2018-10-26 21:49:11,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-10-26 21:49:11,871 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:49:11,872 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:49:11,872 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:49:11,872 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:49:11,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1990175672, now seen corresponding path program 1 times [2018-10-26 21:49:11,873 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:49:11,873 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:49:11,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:49:11,874 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:49:11,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:49:11,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:49:12,275 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-10-26 21:49:12,275 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:49:12,275 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 21:49:12,276 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 21:49:12,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 21:49:12,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 21:49:12,277 INFO L87 Difference]: Start difference. First operand 2764 states and 4043 transitions. Second operand 3 states. [2018-10-26 21:49:19,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:49:19,942 INFO L93 Difference]: Finished difference Result 8084 states and 11872 transitions. [2018-10-26 21:49:19,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 21:49:19,943 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 218 [2018-10-26 21:49:19,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:49:19,972 INFO L225 Difference]: With dead ends: 8084 [2018-10-26 21:49:19,973 INFO L226 Difference]: Without dead ends: 5322 [2018-10-26 21:49:19,978 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 21:49:19,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5322 states. [2018-10-26 21:49:20,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5322 to 5322. [2018-10-26 21:49:20,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5322 states. [2018-10-26 21:49:20,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5322 states to 5322 states and 7506 transitions. [2018-10-26 21:49:20,095 INFO L78 Accepts]: Start accepts. Automaton has 5322 states and 7506 transitions. Word has length 218 [2018-10-26 21:49:20,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:49:20,096 INFO L481 AbstractCegarLoop]: Abstraction has 5322 states and 7506 transitions. [2018-10-26 21:49:20,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 21:49:20,096 INFO L276 IsEmpty]: Start isEmpty. Operand 5322 states and 7506 transitions. [2018-10-26 21:49:20,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2018-10-26 21:49:20,101 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:49:20,101 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:49:20,101 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:49:20,102 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:49:20,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1837451638, now seen corresponding path program 1 times [2018-10-26 21:49:20,102 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:49:20,102 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:49:20,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:49:20,104 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:49:20,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:49:20,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:49:20,447 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 4 [2018-10-26 21:49:20,691 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 195 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:49:20,694 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:49:20,694 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 21:49:20,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 21:49:20,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 21:49:20,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:49:20,696 INFO L87 Difference]: Start difference. First operand 5322 states and 7506 transitions. Second operand 4 states. [2018-10-26 21:49:25,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:49:25,364 INFO L93 Difference]: Finished difference Result 11493 states and 16259 transitions. [2018-10-26 21:49:25,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 21:49:25,366 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 225 [2018-10-26 21:49:25,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:49:25,395 INFO L225 Difference]: With dead ends: 11493 [2018-10-26 21:49:25,395 INFO L226 Difference]: Without dead ends: 6173 [2018-10-26 21:49:25,402 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:49:25,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6173 states. [2018-10-26 21:49:25,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6173 to 6173. [2018-10-26 21:49:25,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6173 states. [2018-10-26 21:49:25,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6173 states to 6173 states and 7808 transitions. [2018-10-26 21:49:25,499 INFO L78 Accepts]: Start accepts. Automaton has 6173 states and 7808 transitions. Word has length 225 [2018-10-26 21:49:25,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:49:25,500 INFO L481 AbstractCegarLoop]: Abstraction has 6173 states and 7808 transitions. [2018-10-26 21:49:25,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 21:49:25,500 INFO L276 IsEmpty]: Start isEmpty. Operand 6173 states and 7808 transitions. [2018-10-26 21:49:25,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2018-10-26 21:49:25,506 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:49:25,506 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:49:25,507 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:49:25,507 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:49:25,507 INFO L82 PathProgramCache]: Analyzing trace with hash -241982439, now seen corresponding path program 1 times [2018-10-26 21:49:25,507 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:49:25,507 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:49:25,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:49:25,508 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:49:25,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:49:25,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:49:26,114 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 260 proven. 71 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-10-26 21:49:26,114 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:49:26,115 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 [2018-10-26 21:49:26,135 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:49:26,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:49:26,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:49:26,606 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 260 proven. 71 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-10-26 21:49:26,627 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:49:26,627 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 4 [2018-10-26 21:49:26,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 21:49:26,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 21:49:26,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-26 21:49:26,755 INFO L87 Difference]: Start difference. First operand 6173 states and 7808 transitions. Second operand 5 states. [2018-10-26 21:49:37,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:49:37,701 INFO L93 Difference]: Finished difference Result 21329 states and 27065 transitions. [2018-10-26 21:49:37,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 21:49:37,702 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 289 [2018-10-26 21:49:37,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:49:37,749 INFO L225 Difference]: With dead ends: 21329 [2018-10-26 21:49:37,750 INFO L226 Difference]: Without dead ends: 13388 [2018-10-26 21:49:37,763 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 287 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-26 21:49:37,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13388 states. [2018-10-26 21:49:37,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13388 to 11670. [2018-10-26 21:49:37,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11670 states. [2018-10-26 21:49:37,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11670 states to 11670 states and 13334 transitions. [2018-10-26 21:49:37,983 INFO L78 Accepts]: Start accepts. Automaton has 11670 states and 13334 transitions. Word has length 289 [2018-10-26 21:49:37,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:49:37,984 INFO L481 AbstractCegarLoop]: Abstraction has 11670 states and 13334 transitions. [2018-10-26 21:49:37,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 21:49:37,984 INFO L276 IsEmpty]: Start isEmpty. Operand 11670 states and 13334 transitions. [2018-10-26 21:49:37,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2018-10-26 21:49:37,991 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:49:37,992 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:49:37,992 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:49:37,992 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:49:37,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1305517648, now seen corresponding path program 1 times [2018-10-26 21:49:37,993 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:49:37,993 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:49:37,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:49:37,994 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:49:37,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:49:38,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:49:38,654 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 14 [2018-10-26 21:49:39,007 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 264 proven. 83 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-10-26 21:49:39,008 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:49:39,008 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 [2018-10-26 21:49:39,015 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:49:39,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:49:39,115 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:49:39,750 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 264 proven. 83 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-10-26 21:49:39,772 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:49:39,772 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 7 [2018-10-26 21:49:39,773 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-26 21:49:39,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-26 21:49:39,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-26 21:49:39,774 INFO L87 Difference]: Start difference. First operand 11670 states and 13334 transitions. Second operand 8 states. [2018-10-26 21:49:49,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:49:49,866 INFO L93 Difference]: Finished difference Result 24195 states and 27562 transitions. [2018-10-26 21:49:49,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-26 21:49:49,867 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 325 [2018-10-26 21:49:49,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:49:49,890 INFO L225 Difference]: With dead ends: 24195 [2018-10-26 21:49:49,890 INFO L226 Difference]: Without dead ends: 12093 [2018-10-26 21:49:49,902 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 323 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-10-26 21:49:49,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12093 states. [2018-10-26 21:49:50,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12093 to 12092. [2018-10-26 21:49:50,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12092 states. [2018-10-26 21:49:50,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12092 states to 12092 states and 13765 transitions. [2018-10-26 21:49:50,055 INFO L78 Accepts]: Start accepts. Automaton has 12092 states and 13765 transitions. Word has length 325 [2018-10-26 21:49:50,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:49:50,055 INFO L481 AbstractCegarLoop]: Abstraction has 12092 states and 13765 transitions. [2018-10-26 21:49:50,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-26 21:49:50,055 INFO L276 IsEmpty]: Start isEmpty. Operand 12092 states and 13765 transitions. [2018-10-26 21:49:50,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2018-10-26 21:49:50,061 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:49:50,062 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, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:49:50,062 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:49:50,062 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:49:50,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1290586109, now seen corresponding path program 1 times [2018-10-26 21:49:50,063 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:49:50,063 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:49:50,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:49:50,064 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:49:50,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:49:50,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:49:50,733 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2018-10-26 21:49:51,453 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 0 proven. 427 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:49:51,453 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:49:51,453 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 [2018-10-26 21:49:51,465 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:49:51,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:49:51,557 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:51:04,780 WARN L179 SmtUtils]: Spent 1.14 m on a formula simplification. DAG size of input: 1114 DAG size of output: 80 [2018-10-26 21:51:08,730 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 179 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2018-10-26 21:51:08,750 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 21:51:08,750 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2018-10-26 21:51:08,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-26 21:51:08,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-26 21:51:08,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=52, Unknown=2, NotChecked=0, Total=72 [2018-10-26 21:51:08,751 INFO L87 Difference]: Start difference. First operand 12092 states and 13765 transitions. Second operand 9 states. [2018-10-26 21:51:15,626 WARN L179 SmtUtils]: Spent 2.18 s on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2018-10-26 21:52:03,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:52:03,120 INFO L93 Difference]: Finished difference Result 48075 states and 54602 transitions. [2018-10-26 21:52:03,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-26 21:52:03,122 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 329 [2018-10-26 21:52:03,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:52:03,171 INFO L225 Difference]: With dead ends: 48075 [2018-10-26 21:52:03,171 INFO L226 Difference]: Without dead ends: 30432 [2018-10-26 21:52:03,193 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 276 SyntacticMatches, 59 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 79.3s TimeCoverageRelationStatistics Valid=62, Invalid=176, Unknown=2, NotChecked=0, Total=240 [2018-10-26 21:52:03,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30432 states. [2018-10-26 21:52:03,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30432 to 29978. [2018-10-26 21:52:03,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29978 states. [2018-10-26 21:52:03,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29978 states to 29978 states and 32667 transitions. [2018-10-26 21:52:03,580 INFO L78 Accepts]: Start accepts. Automaton has 29978 states and 32667 transitions. Word has length 329 [2018-10-26 21:52:03,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:52:03,581 INFO L481 AbstractCegarLoop]: Abstraction has 29978 states and 32667 transitions. [2018-10-26 21:52:03,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-26 21:52:03,581 INFO L276 IsEmpty]: Start isEmpty. Operand 29978 states and 32667 transitions. [2018-10-26 21:52:03,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2018-10-26 21:52:03,596 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:52:03,596 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, 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, 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] [2018-10-26 21:52:03,597 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:52:03,597 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:52:03,597 INFO L82 PathProgramCache]: Analyzing trace with hash -228542191, now seen corresponding path program 1 times [2018-10-26 21:52:03,597 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:52:03,598 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:52:03,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:52:03,599 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:52:03,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:52:03,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:52:04,386 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 179 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2018-10-26 21:52:04,386 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:52:04,387 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 21:52:04,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 21:52:04,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 21:52:04,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 21:52:04,388 INFO L87 Difference]: Start difference. First operand 29978 states and 32667 transitions. Second operand 3 states. [2018-10-26 21:52:07,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:52:07,793 INFO L93 Difference]: Finished difference Result 59097 states and 64468 transitions. [2018-10-26 21:52:07,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 21:52:07,794 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 434 [2018-10-26 21:52:07,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:52:07,843 INFO L225 Difference]: With dead ends: 59097 [2018-10-26 21:52:07,843 INFO L226 Difference]: Without dead ends: 29975 [2018-10-26 21:52:07,866 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 4 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 21:52:07,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29975 states. [2018-10-26 21:52:08,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29975 to 29547. [2018-10-26 21:52:08,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29547 states. [2018-10-26 21:52:08,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29547 states to 29547 states and 32149 transitions. [2018-10-26 21:52:08,179 INFO L78 Accepts]: Start accepts. Automaton has 29547 states and 32149 transitions. Word has length 434 [2018-10-26 21:52:08,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:52:08,180 INFO L481 AbstractCegarLoop]: Abstraction has 29547 states and 32149 transitions. [2018-10-26 21:52:08,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 21:52:08,181 INFO L276 IsEmpty]: Start isEmpty. Operand 29547 states and 32149 transitions. [2018-10-26 21:52:08,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2018-10-26 21:52:08,192 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:52:08,192 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2018-10-26 21:52:08,193 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:52:08,193 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:52:08,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1009950167, now seen corresponding path program 1 times [2018-10-26 21:52:08,193 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:52:08,193 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:52:08,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:52:08,194 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:52:08,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:52:08,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:52:08,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1077 backedges. 530 proven. 404 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2018-10-26 21:52:08,829 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:52:08,829 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 [2018-10-26 21:52:08,838 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:52:08,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:52:08,970 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:52:13,637 WARN L179 SmtUtils]: Spent 4.47 s on a formula simplification. DAG size of input: 428 DAG size of output: 134 [2018-10-26 21:52:19,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1077 backedges. 567 proven. 48 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2018-10-26 21:52:19,031 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:52:19,031 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2018-10-26 21:52:19,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-26 21:52:19,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-26 21:52:19,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-10-26 21:52:19,033 INFO L87 Difference]: Start difference. First operand 29547 states and 32149 transitions. Second operand 9 states. [2018-10-26 21:52:36,295 WARN L179 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 145 [2018-10-26 21:52:42,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:52:42,981 INFO L93 Difference]: Finished difference Result 73636 states and 79722 transitions. [2018-10-26 21:52:42,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-26 21:52:42,982 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 481 [2018-10-26 21:52:42,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:52:43,035 INFO L225 Difference]: With dead ends: 73636 [2018-10-26 21:52:43,035 INFO L226 Difference]: Without dead ends: 44469 [2018-10-26 21:52:43,058 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 436 SyntacticMatches, 49 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2018-10-26 21:52:43,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44469 states. [2018-10-26 21:52:43,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44469 to 39761. [2018-10-26 21:52:43,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39761 states. [2018-10-26 21:52:43,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39761 states to 39761 states and 42450 transitions. [2018-10-26 21:52:43,497 INFO L78 Accepts]: Start accepts. Automaton has 39761 states and 42450 transitions. Word has length 481 [2018-10-26 21:52:43,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:52:43,498 INFO L481 AbstractCegarLoop]: Abstraction has 39761 states and 42450 transitions. [2018-10-26 21:52:43,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-26 21:52:43,498 INFO L276 IsEmpty]: Start isEmpty. Operand 39761 states and 42450 transitions. [2018-10-26 21:52:43,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 533 [2018-10-26 21:52:43,514 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:52:43,515 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, 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, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:52:43,515 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:52:43,515 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:52:43,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1542002445, now seen corresponding path program 1 times [2018-10-26 21:52:43,516 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:52:43,516 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:52:43,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:52:43,520 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:52:43,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:52:43,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:52:44,724 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 235 proven. 274 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2018-10-26 21:52:44,724 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:52:44,724 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 [2018-10-26 21:52:44,732 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:52:44,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:52:44,874 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:52:45,337 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 394 proven. 93 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2018-10-26 21:52:45,357 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:52:45,358 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2018-10-26 21:52:45,358 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-26 21:52:45,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-26 21:52:45,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2018-10-26 21:52:45,359 INFO L87 Difference]: Start difference. First operand 39761 states and 42450 transitions. Second operand 11 states. Received shutdown request... [2018-10-26 21:52:51,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-26 21:52:51,034 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-26 21:52:51,040 WARN L205 ceAbstractionStarter]: Timeout [2018-10-26 21:52:51,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 09:52:51 BoogieIcfgContainer [2018-10-26 21:52:51,040 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-26 21:52:51,041 INFO L168 Benchmark]: Toolchain (without parser) took 251373.49 ms. Allocated memory was 1.5 GB in the beginning and 3.8 GB in the end (delta: 2.3 GB). Free memory was 1.4 GB in the beginning and 1.9 GB in the end (delta: -549.8 MB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. [2018-10-26 21:52:51,042 INFO L168 Benchmark]: CDTParser took 0.23 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. [2018-10-26 21:52:51,043 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1608.42 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: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. [2018-10-26 21:52:51,044 INFO L168 Benchmark]: Boogie Procedure Inliner took 500.05 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 772.3 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -903.9 MB). Peak memory consumption was 56.1 MB. Max. memory is 7.1 GB. [2018-10-26 21:52:51,045 INFO L168 Benchmark]: Boogie Preprocessor took 376.25 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. [2018-10-26 21:52:51,045 INFO L168 Benchmark]: RCFGBuilder took 9356.72 ms. Allocated memory is still 2.3 GB. Free memory was 2.1 GB in the beginning and 1.7 GB in the end (delta: 452.2 MB). Peak memory consumption was 452.2 MB. Max. memory is 7.1 GB. [2018-10-26 21:52:51,049 INFO L168 Benchmark]: TraceAbstraction took 239526.98 ms. Allocated memory was 2.3 GB in the beginning and 3.8 GB in the end (delta: 1.5 GB). Free memory was 1.7 GB in the beginning and 1.9 GB in the end (delta: -277.9 MB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. [2018-10-26 21:52:51,055 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 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 1608.42 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: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 500.05 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 772.3 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -903.9 MB). Peak memory consumption was 56.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 376.25 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 9356.72 ms. Allocated memory is still 2.3 GB. Free memory was 2.1 GB in the beginning and 1.7 GB in the end (delta: 452.2 MB). Peak memory consumption was 452.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 239526.98 ms. Allocated memory was 2.3 GB in the beginning and 3.8 GB in the end (delta: 1.5 GB). Free memory was 1.7 GB in the beginning and 1.9 GB in the end (delta: -277.9 MB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 191]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 191). Cancelled while BasicCegarLoop was constructing difference of abstraction (39761states) and FLOYD_HOARE automaton (currently 6 states, 11 states before enhancement),while ReachableStatesComputation was computing reachable states (21860 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 591 locations, 1 error locations. TIMEOUT Result, 239.4s OverallTime, 10 OverallIterations, 6 TraceHistogramMax, 140.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3278 SDtfs, 20885 SDslu, 2200 SDs, 0 SdLazy, 47819 SolverSat, 6043 SolverUnsat, 13 SolverUnknown, 0 SolverNotchecked, 124.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2039 GetRequests, 1863 SyntacticMatches, 120 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 90.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39761occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 1.8s AutomataMinimizationTime, 9 MinimizatonAttempts, 7789 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 93.1s InterpolantComputationTime, 4985 NumberOfCodeBlocks, 4985 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 4970 ConstructedInterpolants, 226 QuantifiedInterpolants, 20054217 SizeOfPredicates, 13 NumberOfNonLiveVariables, 2599 ConjunctsInSsa, 32 ConjunctsInUnsatCore, 15 InterpolantComputations, 6 PerfectInterpolantSequences, 5439/6993 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown