java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label03_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 14:21:49,737 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 14:21:49,739 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 14:21:49,751 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 14:21:49,751 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 14:21:49,753 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 14:21:49,754 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 14:21:49,756 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 14:21:49,758 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 14:21:49,759 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 14:21:49,760 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 14:21:49,760 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 14:21:49,761 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 14:21:49,762 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 14:21:49,764 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 14:21:49,764 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 14:21:49,765 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 14:21:49,767 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 14:21:49,769 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 14:21:49,771 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 14:21:49,772 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 14:21:49,774 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 14:21:49,776 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 14:21:49,786 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-24 14:21:49,810 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 14:21:49,811 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 14:21:49,817 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 14:21:49,817 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 14:21:49,818 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 14:21:49,818 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 14:21:49,818 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 14:21:49,818 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 14:21:49,819 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 14:21:49,819 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 14:21:49,819 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 14:21:49,819 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 14:21:49,819 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 14:21:49,819 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 14:21:49,820 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 14:21:49,820 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 14:21:49,820 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 14:21:49,820 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 14:21:49,820 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 14:21:49,821 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 14:21:49,821 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 14:21:49,821 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 14:21:49,821 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 14:21:49,821 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 14:21:49,822 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 14:21:49,822 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 14:21:49,822 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 14:21:49,822 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 14:21:49,873 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 14:21:49,890 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 14:21:49,896 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 14:21:49,898 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 14:21:49,898 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 14:21:49,899 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label03_false-unreach-call.c [2018-10-24 14:21:49,975 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/551507c34/848776d674424ae28e22e82e76190401/FLAG50ae9e6e4 [2018-10-24 14:21:50,677 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 14:21:50,677 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label03_false-unreach-call.c [2018-10-24 14:21:50,706 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/551507c34/848776d674424ae28e22e82e76190401/FLAG50ae9e6e4 [2018-10-24 14:21:50,730 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/551507c34/848776d674424ae28e22e82e76190401 [2018-10-24 14:21:50,742 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 14:21:50,744 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 14:21:50,745 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 14:21:50,745 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 14:21:50,752 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 14:21:50,753 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:21:50" (1/1) ... [2018-10-24 14:21:50,756 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48886557 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:21:50, skipping insertion in model container [2018-10-24 14:21:50,757 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:21:50" (1/1) ... [2018-10-24 14:21:50,767 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 14:21:50,875 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 14:21:51,658 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 14:21:51,663 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 14:21:51,911 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 14:21:51,932 INFO L193 MainTranslator]: Completed translation [2018-10-24 14:21:51,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:21:51 WrapperNode [2018-10-24 14:21:51,933 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 14:21:51,935 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 14:21:51,935 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 14:21:51,935 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 14:21:51,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:21:51" (1/1) ... [2018-10-24 14:21:51,983 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:21:51" (1/1) ... [2018-10-24 14:21:52,256 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 14:21:52,257 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 14:21:52,257 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 14:21:52,257 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 14:21:52,268 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:21:51" (1/1) ... [2018-10-24 14:21:52,268 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:21:51" (1/1) ... [2018-10-24 14:21:52,291 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:21:51" (1/1) ... [2018-10-24 14:21:52,291 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:21:51" (1/1) ... [2018-10-24 14:21:52,352 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:21:51" (1/1) ... [2018-10-24 14:21:52,387 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:21:51" (1/1) ... [2018-10-24 14:21:52,402 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:21:51" (1/1) ... [2018-10-24 14:21:52,417 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 14:21:52,418 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 14:21:52,418 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 14:21:52,418 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 14:21:52,419 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:21:51" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 14:21:52,492 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-24 14:21:52,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 14:21:52,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 14:21:59,160 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 14:21:59,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:21:59 BoogieIcfgContainer [2018-10-24 14:21:59,161 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 14:21:59,162 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 14:21:59,162 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 14:21:59,165 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 14:21:59,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:21:50" (1/3) ... [2018-10-24 14:21:59,167 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cab9ae3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:21:59, skipping insertion in model container [2018-10-24 14:21:59,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:21:51" (2/3) ... [2018-10-24 14:21:59,167 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cab9ae3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:21:59, skipping insertion in model container [2018-10-24 14:21:59,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:21:59" (3/3) ... [2018-10-24 14:21:59,170 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label03_false-unreach-call.c [2018-10-24 14:21:59,181 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 14:21:59,191 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 14:21:59,209 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 14:21:59,250 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 14:21:59,251 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 14:21:59,251 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 14:21:59,251 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 14:21:59,251 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 14:21:59,251 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 14:21:59,251 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 14:21:59,252 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 14:21:59,252 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 14:21:59,282 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states. [2018-10-24 14:21:59,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-24 14:21:59,290 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:21:59,291 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:21:59,293 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:21:59,300 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:21:59,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1805984234, now seen corresponding path program 1 times [2018-10-24 14:21:59,303 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:21:59,304 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:21:59,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:21:59,364 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:21:59,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:21:59,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:21:59,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:21:59,507 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:21:59,507 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 14:21:59,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 14:21:59,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 14:21:59,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 14:21:59,526 INFO L87 Difference]: Start difference. First operand 397 states. Second operand 3 states. [2018-10-24 14:22:03,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:22:03,138 INFO L93 Difference]: Finished difference Result 1125 states and 2106 transitions. [2018-10-24 14:22:03,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 14:22:03,140 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-10-24 14:22:03,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:22:03,165 INFO L225 Difference]: With dead ends: 1125 [2018-10-24 14:22:03,165 INFO L226 Difference]: Without dead ends: 724 [2018-10-24 14:22:03,171 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 14:22:03,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2018-10-24 14:22:03,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 724. [2018-10-24 14:22:03,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 724 states. [2018-10-24 14:22:03,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 1169 transitions. [2018-10-24 14:22:03,280 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 1169 transitions. Word has length 7 [2018-10-24 14:22:03,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:22:03,280 INFO L481 AbstractCegarLoop]: Abstraction has 724 states and 1169 transitions. [2018-10-24 14:22:03,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 14:22:03,280 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 1169 transitions. [2018-10-24 14:22:03,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-24 14:22:03,283 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:22:03,283 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-24 14:22:03,283 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:22:03,284 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:22:03,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1276437618, now seen corresponding path program 1 times [2018-10-24 14:22:03,284 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:22:03,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:22:03,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:22:03,285 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:22:03,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:22:03,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:22:03,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:22:03,592 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:22:03,593 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 14:22:03,595 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:22:03,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:22:03,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:22:03,597 INFO L87 Difference]: Start difference. First operand 724 states and 1169 transitions. Second operand 4 states. [2018-10-24 14:22:10,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:22:10,238 INFO L93 Difference]: Finished difference Result 2781 states and 4563 transitions. [2018-10-24 14:22:10,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:22:10,239 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 79 [2018-10-24 14:22:10,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:22:10,252 INFO L225 Difference]: With dead ends: 2781 [2018-10-24 14:22:10,252 INFO L226 Difference]: Without dead ends: 2059 [2018-10-24 14:22:10,255 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 [2018-10-24 14:22:10,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2059 states. [2018-10-24 14:22:10,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2059 to 1384. [2018-10-24 14:22:10,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1384 states. [2018-10-24 14:22:10,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 2143 transitions. [2018-10-24 14:22:10,296 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 2143 transitions. Word has length 79 [2018-10-24 14:22:10,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:22:10,297 INFO L481 AbstractCegarLoop]: Abstraction has 1384 states and 2143 transitions. [2018-10-24 14:22:10,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:22:10,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 2143 transitions. [2018-10-24 14:22:10,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-24 14:22:10,300 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:22:10,300 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-24 14:22:10,301 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:22:10,301 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:22:10,301 INFO L82 PathProgramCache]: Analyzing trace with hash 304108284, now seen corresponding path program 1 times [2018-10-24 14:22:10,301 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:22:10,301 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:22:10,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:22:10,302 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:22:10,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:22:10,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:22:10,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:22:10,452 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:22:10,452 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 14:22:10,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:22:10,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:22:10,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:22:10,453 INFO L87 Difference]: Start difference. First operand 1384 states and 2143 transitions. Second operand 4 states. [2018-10-24 14:22:16,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:22:16,749 INFO L93 Difference]: Finished difference Result 3426 states and 5150 transitions. [2018-10-24 14:22:16,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:22:16,750 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2018-10-24 14:22:16,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:22:16,762 INFO L225 Difference]: With dead ends: 3426 [2018-10-24 14:22:16,762 INFO L226 Difference]: Without dead ends: 2044 [2018-10-24 14:22:16,765 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 [2018-10-24 14:22:16,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2044 states. [2018-10-24 14:22:16,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2044 to 2044. [2018-10-24 14:22:16,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2044 states. [2018-10-24 14:22:16,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2044 states to 2044 states and 2793 transitions. [2018-10-24 14:22:16,811 INFO L78 Accepts]: Start accepts. Automaton has 2044 states and 2793 transitions. Word has length 83 [2018-10-24 14:22:16,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:22:16,812 INFO L481 AbstractCegarLoop]: Abstraction has 2044 states and 2793 transitions. [2018-10-24 14:22:16,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:22:16,812 INFO L276 IsEmpty]: Start isEmpty. Operand 2044 states and 2793 transitions. [2018-10-24 14:22:16,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-10-24 14:22:16,814 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:22:16,814 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-24 14:22:16,814 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:22:16,815 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:22:16,815 INFO L82 PathProgramCache]: Analyzing trace with hash -792297830, now seen corresponding path program 1 times [2018-10-24 14:22:16,815 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:22:16,815 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:22:16,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:22:16,816 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:22:16,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:22:16,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:22:17,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:22:17,175 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:22:17,175 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 14:22:17,196 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:22:17,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:22:17,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:22:17,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-10-24 14:22:17,472 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 14:22:17,473 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2018-10-24 14:22:17,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 14:22:17,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 14:22:17,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 14:22:17,474 INFO L87 Difference]: Start difference. First operand 2044 states and 2793 transitions. Second operand 5 states. [2018-10-24 14:22:23,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:22:23,876 INFO L93 Difference]: Finished difference Result 7386 states and 10244 transitions. [2018-10-24 14:22:23,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:22:23,876 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 95 [2018-10-24 14:22:23,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:22:23,907 INFO L225 Difference]: With dead ends: 7386 [2018-10-24 14:22:23,907 INFO L226 Difference]: Without dead ends: 5344 [2018-10-24 14:22:23,912 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 14:22:23,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5344 states. [2018-10-24 14:22:24,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5344 to 5344. [2018-10-24 14:22:24,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5344 states. [2018-10-24 14:22:24,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5344 states to 5344 states and 6805 transitions. [2018-10-24 14:22:24,015 INFO L78 Accepts]: Start accepts. Automaton has 5344 states and 6805 transitions. Word has length 95 [2018-10-24 14:22:24,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:22:24,016 INFO L481 AbstractCegarLoop]: Abstraction has 5344 states and 6805 transitions. [2018-10-24 14:22:24,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 14:22:24,016 INFO L276 IsEmpty]: Start isEmpty. Operand 5344 states and 6805 transitions. [2018-10-24 14:22:24,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2018-10-24 14:22:24,029 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:22:24,030 INFO L375 BasicCegarLoop]: trace histogram [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, 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] [2018-10-24 14:22:24,030 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:22:24,030 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:22:24,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1740744444, now seen corresponding path program 1 times [2018-10-24 14:22:24,031 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:22:24,031 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:22:24,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:22:24,032 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:22:24,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:22:24,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:22:24,389 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-10-24 14:22:24,389 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:22:24,389 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 14:22:24,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 14:22:24,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 14:22:24,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 14:22:24,391 INFO L87 Difference]: Start difference. First operand 5344 states and 6805 transitions. Second operand 3 states. [2018-10-24 14:22:26,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:22:26,546 INFO L93 Difference]: Finished difference Result 12666 states and 16536 transitions. [2018-10-24 14:22:26,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 14:22:26,548 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 244 [2018-10-24 14:22:26,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:22:26,581 INFO L225 Difference]: With dead ends: 12666 [2018-10-24 14:22:26,581 INFO L226 Difference]: Without dead ends: 7324 [2018-10-24 14:22:26,590 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 14:22:26,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7324 states. [2018-10-24 14:22:26,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7324 to 7324. [2018-10-24 14:22:26,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7324 states. [2018-10-24 14:22:26,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7324 states to 7324 states and 9181 transitions. [2018-10-24 14:22:26,726 INFO L78 Accepts]: Start accepts. Automaton has 7324 states and 9181 transitions. Word has length 244 [2018-10-24 14:22:26,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:22:26,727 INFO L481 AbstractCegarLoop]: Abstraction has 7324 states and 9181 transitions. [2018-10-24 14:22:26,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 14:22:26,727 INFO L276 IsEmpty]: Start isEmpty. Operand 7324 states and 9181 transitions. [2018-10-24 14:22:26,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2018-10-24 14:22:26,740 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:22:26,741 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:22:26,741 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:22:26,741 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:22:26,742 INFO L82 PathProgramCache]: Analyzing trace with hash 149389545, now seen corresponding path program 1 times [2018-10-24 14:22:26,742 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:22:26,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:22:26,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:22:26,743 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:22:26,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:22:26,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:22:27,379 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-10-24 14:22:27,769 WARN L179 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2018-10-24 14:22:28,034 WARN L179 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2018-10-24 14:22:28,579 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-24 14:22:28,580 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:22:28,580 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 14:22:28,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 14:22:28,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 14:22:28,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-24 14:22:28,581 INFO L87 Difference]: Start difference. First operand 7324 states and 9181 transitions. Second operand 7 states. [2018-10-24 14:22:35,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:22:35,500 INFO L93 Difference]: Finished difference Result 14987 states and 18714 transitions. [2018-10-24 14:22:35,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 14:22:35,501 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 394 [2018-10-24 14:22:35,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:22:35,526 INFO L225 Difference]: With dead ends: 14987 [2018-10-24 14:22:35,527 INFO L226 Difference]: Without dead ends: 7665 [2018-10-24 14:22:35,534 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-10-24 14:22:35,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7665 states. [2018-10-24 14:22:35,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7665 to 7654. [2018-10-24 14:22:35,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7654 states. [2018-10-24 14:22:35,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7654 states to 7654 states and 9517 transitions. [2018-10-24 14:22:35,647 INFO L78 Accepts]: Start accepts. Automaton has 7654 states and 9517 transitions. Word has length 394 [2018-10-24 14:22:35,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:22:35,648 INFO L481 AbstractCegarLoop]: Abstraction has 7654 states and 9517 transitions. [2018-10-24 14:22:35,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 14:22:35,648 INFO L276 IsEmpty]: Start isEmpty. Operand 7654 states and 9517 transitions. [2018-10-24 14:22:35,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2018-10-24 14:22:35,659 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:22:35,659 INFO L375 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 14:22:35,660 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:22:35,660 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:22:35,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1151752647, now seen corresponding path program 1 times [2018-10-24 14:22:35,660 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:22:35,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:22:35,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:22:35,661 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:22:35,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:22:35,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:22:36,236 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 243 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2018-10-24 14:22:36,236 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:22:36,236 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 14:22:36,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 14:22:36,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 14:22:36,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-24 14:22:36,238 INFO L87 Difference]: Start difference. First operand 7654 states and 9517 transitions. Second operand 7 states. [2018-10-24 14:22:41,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:22:41,057 INFO L93 Difference]: Finished difference Result 16382 states and 20215 transitions. [2018-10-24 14:22:41,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 14:22:41,059 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 482 [2018-10-24 14:22:41,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:22:41,082 INFO L225 Difference]: With dead ends: 16382 [2018-10-24 14:22:41,082 INFO L226 Difference]: Without dead ends: 7650 [2018-10-24 14:22:41,089 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-24 14:22:41,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7650 states. [2018-10-24 14:22:41,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7650 to 7650. [2018-10-24 14:22:41,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7650 states. [2018-10-24 14:22:41,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7650 states to 7650 states and 8513 transitions. [2018-10-24 14:22:41,190 INFO L78 Accepts]: Start accepts. Automaton has 7650 states and 8513 transitions. Word has length 482 [2018-10-24 14:22:41,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:22:41,191 INFO L481 AbstractCegarLoop]: Abstraction has 7650 states and 8513 transitions. [2018-10-24 14:22:41,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 14:22:41,191 INFO L276 IsEmpty]: Start isEmpty. Operand 7650 states and 8513 transitions. [2018-10-24 14:22:41,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 545 [2018-10-24 14:22:41,204 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:22:41,205 INFO L375 BasicCegarLoop]: trace histogram [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, 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] [2018-10-24 14:22:41,205 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:22:41,205 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:22:41,205 INFO L82 PathProgramCache]: Analyzing trace with hash 248406718, now seen corresponding path program 1 times [2018-10-24 14:22:41,206 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:22:41,206 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:22:41,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:22:41,207 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:22:41,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:22:41,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:22:41,758 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 449 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-24 14:22:41,758 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:22:41,758 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:22:41,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:22:41,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:22:41,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:22:41,760 INFO L87 Difference]: Start difference. First operand 7650 states and 8513 transitions. Second operand 4 states. [2018-10-24 14:22:44,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:22:44,932 INFO L93 Difference]: Finished difference Result 17608 states and 19679 transitions. [2018-10-24 14:22:44,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:22:44,932 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 544 [2018-10-24 14:22:44,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:22:44,952 INFO L225 Difference]: With dead ends: 17608 [2018-10-24 14:22:44,952 INFO L226 Difference]: Without dead ends: 10290 [2018-10-24 14:22:44,961 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:22:44,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10290 states. [2018-10-24 14:22:45,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10290 to 10290. [2018-10-24 14:22:45,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10290 states. [2018-10-24 14:22:45,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10290 states to 10290 states and 11148 transitions. [2018-10-24 14:22:45,088 INFO L78 Accepts]: Start accepts. Automaton has 10290 states and 11148 transitions. Word has length 544 [2018-10-24 14:22:45,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:22:45,089 INFO L481 AbstractCegarLoop]: Abstraction has 10290 states and 11148 transitions. [2018-10-24 14:22:45,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:22:45,090 INFO L276 IsEmpty]: Start isEmpty. Operand 10290 states and 11148 transitions. [2018-10-24 14:22:45,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 724 [2018-10-24 14:22:45,119 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:22:45,120 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:22:45,120 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:22:45,120 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:22:45,121 INFO L82 PathProgramCache]: Analyzing trace with hash 662787585, now seen corresponding path program 1 times [2018-10-24 14:22:45,121 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:22:45,121 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:22:45,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:22:45,122 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:22:45,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:22:45,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:22:45,823 WARN L179 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2018-10-24 14:22:46,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 965 proven. 0 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2018-10-24 14:22:46,289 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:22:46,290 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:22:46,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:22:46,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:22:46,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:22:46,292 INFO L87 Difference]: Start difference. First operand 10290 states and 11148 transitions. Second operand 4 states. [2018-10-24 14:22:49,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:22:49,042 INFO L93 Difference]: Finished difference Result 22888 states and 24885 transitions. [2018-10-24 14:22:49,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:22:49,042 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 723 [2018-10-24 14:22:49,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:22:49,068 INFO L225 Difference]: With dead ends: 22888 [2018-10-24 14:22:49,068 INFO L226 Difference]: Without dead ends: 12930 [2018-10-24 14:22:49,079 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:22:49,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12930 states. [2018-10-24 14:22:49,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12930 to 12930. [2018-10-24 14:22:49,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12930 states. [2018-10-24 14:22:49,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12930 states to 12930 states and 13876 transitions. [2018-10-24 14:22:49,238 INFO L78 Accepts]: Start accepts. Automaton has 12930 states and 13876 transitions. Word has length 723 [2018-10-24 14:22:49,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:22:49,239 INFO L481 AbstractCegarLoop]: Abstraction has 12930 states and 13876 transitions. [2018-10-24 14:22:49,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:22:49,239 INFO L276 IsEmpty]: Start isEmpty. Operand 12930 states and 13876 transitions. [2018-10-24 14:22:49,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 823 [2018-10-24 14:22:49,257 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:22:49,258 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:22:49,258 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:22:49,258 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:22:49,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1038880993, now seen corresponding path program 1 times [2018-10-24 14:22:49,259 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:22:49,259 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:22:49,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:22:49,260 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:22:49,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:22:49,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:22:49,922 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-10-24 14:22:50,416 WARN L179 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2018-10-24 14:22:51,089 WARN L179 SmtUtils]: Spent 590.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2018-10-24 14:22:51,856 INFO L134 CoverageAnalysis]: Checked inductivity of 948 backedges. 15 proven. 207 refuted. 0 times theorem prover too weak. 726 trivial. 0 not checked. [2018-10-24 14:22:51,856 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:22:51,857 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 14:22:51,864 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:22:52,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:22:52,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:22:52,381 INFO L134 CoverageAnalysis]: Checked inductivity of 948 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 929 trivial. 0 not checked. [2018-10-24 14:22:52,403 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 14:22:52,403 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2018-10-24 14:22:52,404 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-24 14:22:52,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-24 14:22:52,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-24 14:22:52,405 INFO L87 Difference]: Start difference. First operand 12930 states and 13876 transitions. Second operand 8 states. [2018-10-24 14:22:57,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:22:57,393 INFO L93 Difference]: Finished difference Result 25664 states and 27554 transitions. [2018-10-24 14:22:57,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-24 14:22:57,394 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 822 [2018-10-24 14:22:57,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:22:57,415 INFO L225 Difference]: With dead ends: 25664 [2018-10-24 14:22:57,415 INFO L226 Difference]: Without dead ends: 13066 [2018-10-24 14:22:57,427 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 832 GetRequests, 823 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-10-24 14:22:57,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13066 states. [2018-10-24 14:22:57,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13066 to 12930. [2018-10-24 14:22:57,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12930 states. [2018-10-24 14:22:57,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12930 states to 12930 states and 13645 transitions. [2018-10-24 14:22:57,583 INFO L78 Accepts]: Start accepts. Automaton has 12930 states and 13645 transitions. Word has length 822 [2018-10-24 14:22:57,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:22:57,585 INFO L481 AbstractCegarLoop]: Abstraction has 12930 states and 13645 transitions. [2018-10-24 14:22:57,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-24 14:22:57,585 INFO L276 IsEmpty]: Start isEmpty. Operand 12930 states and 13645 transitions. [2018-10-24 14:22:57,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 840 [2018-10-24 14:22:57,601 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:22:57,602 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:22:57,602 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:22:57,602 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:22:57,603 INFO L82 PathProgramCache]: Analyzing trace with hash -372368227, now seen corresponding path program 1 times [2018-10-24 14:22:57,603 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:22:57,603 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:22:57,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:22:57,604 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:22:57,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:22:57,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:22:58,510 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 225 proven. 0 refuted. 0 times theorem prover too weak. 732 trivial. 0 not checked. [2018-10-24 14:22:58,510 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:22:58,511 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:22:58,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:22:58,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:22:58,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:22:58,512 INFO L87 Difference]: Start difference. First operand 12930 states and 13645 transitions. Second operand 4 states. [2018-10-24 14:23:01,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:23:01,485 INFO L93 Difference]: Finished difference Result 35428 states and 37577 transitions. [2018-10-24 14:23:01,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:23:01,485 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 839 [2018-10-24 14:23:01,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:23:01,508 INFO L225 Difference]: With dead ends: 35428 [2018-10-24 14:23:01,508 INFO L226 Difference]: Without dead ends: 20838 [2018-10-24 14:23:01,521 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:23:01,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20838 states. [2018-10-24 14:23:01,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20838 to 19518. [2018-10-24 14:23:01,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19518 states. [2018-10-24 14:23:01,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19518 states to 19518 states and 20338 transitions. [2018-10-24 14:23:01,739 INFO L78 Accepts]: Start accepts. Automaton has 19518 states and 20338 transitions. Word has length 839 [2018-10-24 14:23:01,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:23:01,741 INFO L481 AbstractCegarLoop]: Abstraction has 19518 states and 20338 transitions. [2018-10-24 14:23:01,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:23:01,741 INFO L276 IsEmpty]: Start isEmpty. Operand 19518 states and 20338 transitions. [2018-10-24 14:23:01,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1326 [2018-10-24 14:23:01,772 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:23:01,773 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:23:01,773 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:23:01,773 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:23:01,774 INFO L82 PathProgramCache]: Analyzing trace with hash -329048818, now seen corresponding path program 1 times [2018-10-24 14:23:01,774 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:23:01,774 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:23:01,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:23:01,775 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:23:01,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:23:01,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:23:03,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3351 backedges. 2279 proven. 0 refuted. 0 times theorem prover too weak. 1072 trivial. 0 not checked. [2018-10-24 14:23:03,723 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:23:03,724 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:23:03,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:23:03,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:23:03,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:23:03,725 INFO L87 Difference]: Start difference. First operand 19518 states and 20338 transitions. Second operand 4 states. [2018-10-24 14:23:06,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:23:06,314 INFO L93 Difference]: Finished difference Result 37706 states and 39280 transitions. [2018-10-24 14:23:06,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:23:06,321 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1325 [2018-10-24 14:23:06,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:23:06,340 INFO L225 Difference]: With dead ends: 37706 [2018-10-24 14:23:06,340 INFO L226 Difference]: Without dead ends: 18520 [2018-10-24 14:23:06,351 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:23:06,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18520 states. [2018-10-24 14:23:06,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18520 to 18190. [2018-10-24 14:23:06,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18190 states. [2018-10-24 14:23:06,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18190 states to 18190 states and 18728 transitions. [2018-10-24 14:23:06,550 INFO L78 Accepts]: Start accepts. Automaton has 18190 states and 18728 transitions. Word has length 1325 [2018-10-24 14:23:06,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:23:06,552 INFO L481 AbstractCegarLoop]: Abstraction has 18190 states and 18728 transitions. [2018-10-24 14:23:06,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:23:06,552 INFO L276 IsEmpty]: Start isEmpty. Operand 18190 states and 18728 transitions. [2018-10-24 14:23:06,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1327 [2018-10-24 14:23:06,586 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:23:06,587 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:23:06,587 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:23:06,588 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:23:06,588 INFO L82 PathProgramCache]: Analyzing trace with hash -528522988, now seen corresponding path program 1 times [2018-10-24 14:23:06,588 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:23:06,588 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:23:06,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:23:06,589 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:23:06,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:23:06,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:23:07,486 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-24 14:23:10,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3358 backedges. 1657 proven. 243 refuted. 0 times theorem prover too weak. 1458 trivial. 0 not checked. [2018-10-24 14:23:10,377 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:23:10,377 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 14:23:10,384 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:23:10,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:23:10,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:23:12,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3358 backedges. 1657 proven. 0 refuted. 0 times theorem prover too weak. 1701 trivial. 0 not checked. [2018-10-24 14:23:12,226 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 14:23:12,226 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 9 [2018-10-24 14:23:12,228 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-24 14:23:12,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-24 14:23:12,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-10-24 14:23:12,229 INFO L87 Difference]: Start difference. First operand 18190 states and 18728 transitions. Second operand 10 states. [2018-10-24 14:23:21,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:23:21,992 INFO L93 Difference]: Finished difference Result 39354 states and 40522 transitions. [2018-10-24 14:23:21,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-24 14:23:21,993 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 1326 [2018-10-24 14:23:21,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:23:22,009 INFO L225 Difference]: With dead ends: 39354 [2018-10-24 14:23:22,009 INFO L226 Difference]: Without dead ends: 21496 [2018-10-24 14:23:22,017 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1342 GetRequests, 1325 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2018-10-24 14:23:22,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21496 states. [2018-10-24 14:23:22,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21496 to 20171. [2018-10-24 14:23:22,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20171 states. [2018-10-24 14:23:22,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20171 states to 20171 states and 20732 transitions. [2018-10-24 14:23:22,208 INFO L78 Accepts]: Start accepts. Automaton has 20171 states and 20732 transitions. Word has length 1326 [2018-10-24 14:23:22,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:23:22,208 INFO L481 AbstractCegarLoop]: Abstraction has 20171 states and 20732 transitions. [2018-10-24 14:23:22,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-24 14:23:22,209 INFO L276 IsEmpty]: Start isEmpty. Operand 20171 states and 20732 transitions. [2018-10-24 14:23:22,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1358 [2018-10-24 14:23:22,239 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:23:22,240 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 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, 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] [2018-10-24 14:23:22,241 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:23:22,241 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:23:22,241 INFO L82 PathProgramCache]: Analyzing trace with hash 848714193, now seen corresponding path program 1 times [2018-10-24 14:23:22,241 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:23:22,241 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:23:22,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:23:22,242 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:23:22,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:23:22,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:23:24,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4003 backedges. 1760 proven. 158 refuted. 0 times theorem prover too weak. 2085 trivial. 0 not checked. [2018-10-24 14:23:24,616 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:23:24,616 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 14:23:24,629 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:23:24,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:23:24,937 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:23:26,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4003 backedges. 1918 proven. 0 refuted. 0 times theorem prover too weak. 2085 trivial. 0 not checked. [2018-10-24 14:23:26,658 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 14:23:26,659 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2018-10-24 14:23:26,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-24 14:23:26,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-24 14:23:26,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-10-24 14:23:26,661 INFO L87 Difference]: Start difference. First operand 20171 states and 20732 transitions. Second operand 10 states. [2018-10-24 14:23:28,026 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2018-10-24 14:23:36,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:23:36,481 INFO L93 Difference]: Finished difference Result 57673 states and 59323 transitions. [2018-10-24 14:23:36,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-24 14:23:36,482 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 1357 [2018-10-24 14:23:36,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:23:36,513 INFO L225 Difference]: With dead ends: 57673 [2018-10-24 14:23:36,513 INFO L226 Difference]: Without dead ends: 36841 [2018-10-24 14:23:36,531 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1387 GetRequests, 1367 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2018-10-24 14:23:36,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36841 states. [2018-10-24 14:23:36,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36841 to 28230. [2018-10-24 14:23:36,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28230 states. [2018-10-24 14:23:36,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28230 states to 28230 states and 28927 transitions. [2018-10-24 14:23:36,995 INFO L78 Accepts]: Start accepts. Automaton has 28230 states and 28927 transitions. Word has length 1357 [2018-10-24 14:23:36,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:23:36,996 INFO L481 AbstractCegarLoop]: Abstraction has 28230 states and 28927 transitions. [2018-10-24 14:23:36,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-24 14:23:36,996 INFO L276 IsEmpty]: Start isEmpty. Operand 28230 states and 28927 transitions. [2018-10-24 14:23:37,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1610 [2018-10-24 14:23:37,039 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:23:37,040 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:23:37,040 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:23:37,040 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:23:37,041 INFO L82 PathProgramCache]: Analyzing trace with hash -115817809, now seen corresponding path program 1 times [2018-10-24 14:23:37,041 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:23:37,041 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:23:37,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:23:37,042 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:23:37,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:23:37,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:23:38,249 WARN L179 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-24 14:23:38,817 WARN L179 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2018-10-24 14:23:40,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4578 backedges. 3204 proven. 0 refuted. 0 times theorem prover too weak. 1374 trivial. 0 not checked. [2018-10-24 14:23:40,906 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:23:40,906 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 14:23:40,907 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 14:23:40,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 14:23:40,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-24 14:23:40,908 INFO L87 Difference]: Start difference. First operand 28230 states and 28927 transitions. Second operand 5 states. [2018-10-24 14:23:43,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:23:43,562 INFO L93 Difference]: Finished difference Result 56462 states and 57858 transitions. [2018-10-24 14:23:43,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-24 14:23:43,563 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1609 [2018-10-24 14:23:43,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:23:43,590 INFO L225 Difference]: With dead ends: 56462 [2018-10-24 14:23:43,590 INFO L226 Difference]: Without dead ends: 28564 [2018-10-24 14:23:43,604 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-24 14:23:43,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28564 states. [2018-10-24 14:23:43,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28564 to 28230. [2018-10-24 14:23:43,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28230 states. [2018-10-24 14:23:43,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28230 states to 28230 states and 28925 transitions. [2018-10-24 14:23:43,971 INFO L78 Accepts]: Start accepts. Automaton has 28230 states and 28925 transitions. Word has length 1609 [2018-10-24 14:23:43,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:23:43,972 INFO L481 AbstractCegarLoop]: Abstraction has 28230 states and 28925 transitions. [2018-10-24 14:23:43,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 14:23:43,972 INFO L276 IsEmpty]: Start isEmpty. Operand 28230 states and 28925 transitions. [2018-10-24 14:23:44,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1868 [2018-10-24 14:23:44,003 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:23:44,004 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:23:44,004 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:23:44,004 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:23:44,005 INFO L82 PathProgramCache]: Analyzing trace with hash 772003938, now seen corresponding path program 1 times [2018-10-24 14:23:44,005 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:23:44,005 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:23:44,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:23:44,006 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:23:44,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:23:44,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:23:45,646 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-24 14:23:45,805 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-24 14:23:49,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6259 backedges. 3092 proven. 251 refuted. 0 times theorem prover too weak. 2916 trivial. 0 not checked. [2018-10-24 14:23:49,701 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:23:49,701 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 14:23:49,711 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:23:50,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:23:50,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:23:52,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6259 backedges. 3415 proven. 0 refuted. 0 times theorem prover too weak. 2844 trivial. 0 not checked. [2018-10-24 14:23:52,365 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 14:23:52,366 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2018-10-24 14:23:52,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-24 14:23:52,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-24 14:23:52,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-10-24 14:23:52,368 INFO L87 Difference]: Start difference. First operand 28230 states and 28925 transitions. Second operand 10 states. [2018-10-24 14:24:04,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:24:04,389 INFO L93 Difference]: Finished difference Result 58947 states and 60444 transitions. [2018-10-24 14:24:04,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-24 14:24:04,389 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 1867 [2018-10-24 14:24:04,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:24:04,411 INFO L225 Difference]: With dead ends: 58947 [2018-10-24 14:24:04,411 INFO L226 Difference]: Without dead ends: 24332 [2018-10-24 14:24:04,427 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1892 GetRequests, 1872 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2018-10-24 14:24:04,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24332 states. [2018-10-24 14:24:04,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24332 to 24043. [2018-10-24 14:24:04,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24043 states. [2018-10-24 14:24:04,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24043 states to 24043 states and 24555 transitions. [2018-10-24 14:24:04,642 INFO L78 Accepts]: Start accepts. Automaton has 24043 states and 24555 transitions. Word has length 1867 [2018-10-24 14:24:04,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:24:04,643 INFO L481 AbstractCegarLoop]: Abstraction has 24043 states and 24555 transitions. [2018-10-24 14:24:04,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-24 14:24:04,643 INFO L276 IsEmpty]: Start isEmpty. Operand 24043 states and 24555 transitions. [2018-10-24 14:24:04,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2185 [2018-10-24 14:24:04,676 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:24:04,677 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:24:04,677 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:24:04,678 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:24:04,678 INFO L82 PathProgramCache]: Analyzing trace with hash -91108954, now seen corresponding path program 1 times [2018-10-24 14:24:04,678 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:24:04,678 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:24:04,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:24:04,679 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:24:04,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:24:04,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:24:06,284 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-24 14:24:10,008 INFO L134 CoverageAnalysis]: Checked inductivity of 9169 backedges. 4890 proven. 2069 refuted. 0 times theorem prover too weak. 2210 trivial. 0 not checked. [2018-10-24 14:24:10,009 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:24:10,009 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 14:24:10,017 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:24:10,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:24:10,518 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:24:12,722 INFO L134 CoverageAnalysis]: Checked inductivity of 9169 backedges. 5025 proven. 0 refuted. 0 times theorem prover too weak. 4144 trivial. 0 not checked. [2018-10-24 14:24:12,745 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 14:24:12,745 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2018-10-24 14:24:12,747 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-24 14:24:12,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-24 14:24:12,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2018-10-24 14:24:12,748 INFO L87 Difference]: Start difference. First operand 24043 states and 24555 transitions. Second operand 11 states. [2018-10-24 14:24:21,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:24:21,534 INFO L93 Difference]: Finished difference Result 48084 states and 49117 transitions. [2018-10-24 14:24:21,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-24 14:24:21,534 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 2184 [2018-10-24 14:24:21,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:24:21,562 INFO L225 Difference]: With dead ends: 48084 [2018-10-24 14:24:21,562 INFO L226 Difference]: Without dead ends: 25033 [2018-10-24 14:24:21,578 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2198 GetRequests, 2186 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-10-24 14:24:21,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25033 states. [2018-10-24 14:24:21,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25033 to 24373. [2018-10-24 14:24:21,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24373 states. [2018-10-24 14:24:21,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24373 states to 24373 states and 24846 transitions. [2018-10-24 14:24:21,798 INFO L78 Accepts]: Start accepts. Automaton has 24373 states and 24846 transitions. Word has length 2184 [2018-10-24 14:24:21,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:24:21,799 INFO L481 AbstractCegarLoop]: Abstraction has 24373 states and 24846 transitions. [2018-10-24 14:24:21,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-24 14:24:21,800 INFO L276 IsEmpty]: Start isEmpty. Operand 24373 states and 24846 transitions. [2018-10-24 14:24:21,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2398 [2018-10-24 14:24:21,844 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:24:21,845 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:24:21,846 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:24:21,846 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:24:21,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1026329788, now seen corresponding path program 1 times [2018-10-24 14:24:21,847 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:24:21,847 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:24:21,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:24:21,848 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:24:21,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:24:22,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:24:24,100 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-10-24 14:24:27,858 INFO L134 CoverageAnalysis]: Checked inductivity of 10517 backedges. 5242 proven. 572 refuted. 0 times theorem prover too weak. 4703 trivial. 0 not checked. [2018-10-24 14:24:27,859 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:24:27,859 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 14:24:27,867 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:24:28,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:24:28,423 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:24:32,168 INFO L134 CoverageAnalysis]: Checked inductivity of 10517 backedges. 5347 proven. 467 refuted. 0 times theorem prover too weak. 4703 trivial. 0 not checked. [2018-10-24 14:24:32,203 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 14:24:32,204 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 8 [2018-10-24 14:24:32,207 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 14:24:32,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 14:24:32,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-24 14:24:32,210 INFO L87 Difference]: Start difference. First operand 24373 states and 24846 transitions. Second operand 9 states. [2018-10-24 14:24:32,468 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2018-10-24 14:24:38,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:24:38,412 INFO L93 Difference]: Finished difference Result 50221 states and 51217 transitions. [2018-10-24 14:24:38,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-24 14:24:38,412 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 2397 [2018-10-24 14:24:38,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:24:38,440 INFO L225 Difference]: With dead ends: 50221 [2018-10-24 14:24:38,440 INFO L226 Difference]: Without dead ends: 26178 [2018-10-24 14:24:38,457 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2410 GetRequests, 2397 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-10-24 14:24:38,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26178 states. [2018-10-24 14:24:38,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26178 to 25329. [2018-10-24 14:24:38,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25329 states. [2018-10-24 14:24:38,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25329 states to 25329 states and 25771 transitions. [2018-10-24 14:24:38,713 INFO L78 Accepts]: Start accepts. Automaton has 25329 states and 25771 transitions. Word has length 2397 [2018-10-24 14:24:38,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:24:38,714 INFO L481 AbstractCegarLoop]: Abstraction has 25329 states and 25771 transitions. [2018-10-24 14:24:38,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-24 14:24:38,714 INFO L276 IsEmpty]: Start isEmpty. Operand 25329 states and 25771 transitions. [2018-10-24 14:24:38,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2420 [2018-10-24 14:24:38,766 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:24:38,767 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:24:38,768 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:24:38,768 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:24:38,769 INFO L82 PathProgramCache]: Analyzing trace with hash -2131627853, now seen corresponding path program 1 times [2018-10-24 14:24:38,769 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:24:38,769 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:24:38,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:24:38,770 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:24:38,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:24:38,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:24:46,031 INFO L134 CoverageAnalysis]: Checked inductivity of 10677 backedges. 7446 proven. 985 refuted. 0 times theorem prover too weak. 2246 trivial. 0 not checked. [2018-10-24 14:24:46,031 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:24:46,032 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 14:24:46,047 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:24:46,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:24:46,623 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:24:53,400 WARN L179 SmtUtils]: Spent 6.30 s on a formula simplification. DAG size of input: 427 DAG size of output: 22 [2018-10-24 14:24:58,459 INFO L134 CoverageAnalysis]: Checked inductivity of 10677 backedges. 6671 proven. 0 refuted. 0 times theorem prover too weak. 4006 trivial. 0 not checked. [2018-10-24 14:24:58,482 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 14:24:58,484 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2018-10-24 14:24:58,485 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-24 14:24:58,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-24 14:24:58,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2018-10-24 14:24:58,486 INFO L87 Difference]: Start difference. First operand 25329 states and 25771 transitions. Second operand 10 states. [2018-10-24 14:25:15,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:25:15,528 INFO L93 Difference]: Finished difference Result 52737 states and 53653 transitions. [2018-10-24 14:25:15,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-24 14:25:15,529 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 2419 [2018-10-24 14:25:15,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:25:15,553 INFO L225 Difference]: With dead ends: 52737 [2018-10-24 14:25:15,553 INFO L226 Difference]: Without dead ends: 28400 [2018-10-24 14:25:15,566 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2450 GetRequests, 2427 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=168, Invalid=338, Unknown=0, NotChecked=0, Total=506 [2018-10-24 14:25:15,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28400 states. [2018-10-24 14:25:15,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28400 to 22900. [2018-10-24 14:25:15,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22900 states. [2018-10-24 14:25:15,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22900 states to 22900 states and 23262 transitions. [2018-10-24 14:25:15,805 INFO L78 Accepts]: Start accepts. Automaton has 22900 states and 23262 transitions. Word has length 2419 [2018-10-24 14:25:15,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:25:15,806 INFO L481 AbstractCegarLoop]: Abstraction has 22900 states and 23262 transitions. [2018-10-24 14:25:15,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-24 14:25:15,807 INFO L276 IsEmpty]: Start isEmpty. Operand 22900 states and 23262 transitions. [2018-10-24 14:25:15,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2508 [2018-10-24 14:25:15,847 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:25:15,848 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 14:25:15,849 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:25:15,849 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:25:15,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1005413556, now seen corresponding path program 1 times [2018-10-24 14:25:15,849 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:25:15,850 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:25:15,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:25:15,851 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:25:15,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:25:16,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:25:19,978 INFO L134 CoverageAnalysis]: Checked inductivity of 10769 backedges. 813 proven. 5 refuted. 0 times theorem prover too weak. 9951 trivial. 0 not checked. [2018-10-24 14:25:19,978 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:25:19,978 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 14:25:19,987 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:25:20,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:25:20,574 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:25:23,572 INFO L134 CoverageAnalysis]: Checked inductivity of 10769 backedges. 813 proven. 0 refuted. 0 times theorem prover too weak. 9956 trivial. 0 not checked. [2018-10-24 14:25:23,597 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 14:25:23,598 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2018-10-24 14:25:23,600 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 14:25:23,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 14:25:23,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 14:25:23,601 INFO L87 Difference]: Start difference. First operand 22900 states and 23262 transitions. Second operand 5 states. [2018-10-24 14:25:26,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:25:26,245 INFO L93 Difference]: Finished difference Result 44477 states and 45194 transitions. [2018-10-24 14:25:26,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 14:25:26,246 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 2507 [2018-10-24 14:25:26,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:25:26,262 INFO L225 Difference]: With dead ends: 44477 [2018-10-24 14:25:26,263 INFO L226 Difference]: Without dead ends: 18599 [2018-10-24 14:25:26,275 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2511 GetRequests, 2508 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 14:25:26,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18599 states. [2018-10-24 14:25:26,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18599 to 18599. [2018-10-24 14:25:26,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18599 states. [2018-10-24 14:25:26,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18599 states to 18599 states and 18855 transitions. [2018-10-24 14:25:26,438 INFO L78 Accepts]: Start accepts. Automaton has 18599 states and 18855 transitions. Word has length 2507 [2018-10-24 14:25:26,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:25:26,439 INFO L481 AbstractCegarLoop]: Abstraction has 18599 states and 18855 transitions. [2018-10-24 14:25:26,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 14:25:26,439 INFO L276 IsEmpty]: Start isEmpty. Operand 18599 states and 18855 transitions. [2018-10-24 14:25:26,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2641 [2018-10-24 14:25:26,478 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:25:26,479 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:25:26,480 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:25:26,480 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:25:26,481 INFO L82 PathProgramCache]: Analyzing trace with hash -49025679, now seen corresponding path program 1 times [2018-10-24 14:25:26,481 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:25:26,481 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:25:26,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:25:26,482 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:25:26,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:25:26,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown