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/loop-invgen/half_2_true-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-26 22:29:15,410 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 22:29:15,412 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 22:29:15,425 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 22:29:15,426 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 22:29:15,427 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 22:29:15,430 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 22:29:15,433 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 22:29:15,434 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 22:29:15,435 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 22:29:15,436 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 22:29:15,436 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 22:29:15,438 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 22:29:15,439 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 22:29:15,442 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 22:29:15,443 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 22:29:15,444 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 22:29:15,447 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 22:29:15,457 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 22:29:15,459 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 22:29:15,460 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 22:29:15,461 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 22:29:15,465 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-26 22:29:15,482 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-26 22:29:15,511 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 22:29:15,512 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 22:29:15,512 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 22:29:15,513 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-26 22:29:15,513 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-26 22:29:15,513 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-26 22:29:15,514 INFO L133 SettingsManager]: * Use SBE=true [2018-10-26 22:29:15,514 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 22:29:15,515 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 22:29:15,515 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 22:29:15,515 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 22:29:15,515 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 22:29:15,515 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 22:29:15,515 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 22:29:15,516 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 22:29:15,516 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 22:29:15,516 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 22:29:15,516 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 22:29:15,516 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 22:29:15,517 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 22:29:15,518 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 22:29:15,518 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 22:29:15,518 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 22:29:15,519 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-26 22:29:15,519 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 22:29:15,519 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 22:29:15,519 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-26 22:29:15,519 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-26 22:29:15,580 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 22:29:15,596 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 22:29:15,600 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 22:29:15,601 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 22:29:15,602 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 22:29:15,602 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-invgen/half_2_true-unreach-call_true-termination.i [2018-10-26 22:29:15,663 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/bae11116b/bc947eb729a94501aa243f164089261f/FLAGbc7b49e62 [2018-10-26 22:29:16,078 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 22:29:16,078 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/half_2_true-unreach-call_true-termination.i [2018-10-26 22:29:16,084 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/bae11116b/bc947eb729a94501aa243f164089261f/FLAGbc7b49e62 [2018-10-26 22:29:16,098 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/bae11116b/bc947eb729a94501aa243f164089261f [2018-10-26 22:29:16,108 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 22:29:16,110 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-26 22:29:16,111 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 22:29:16,111 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 22:29:16,114 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 22:29:16,115 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:29:16" (1/1) ... [2018-10-26 22:29:16,118 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32a881f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:29:16, skipping insertion in model container [2018-10-26 22:29:16,118 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:29:16" (1/1) ... [2018-10-26 22:29:16,128 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 22:29:16,150 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 22:29:16,321 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 22:29:16,325 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 22:29:16,343 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 22:29:16,359 INFO L193 MainTranslator]: Completed translation [2018-10-26 22:29:16,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:29:16 WrapperNode [2018-10-26 22:29:16,360 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 22:29:16,360 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-26 22:29:16,361 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-26 22:29:16,361 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-26 22:29:16,370 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:29:16" (1/1) ... [2018-10-26 22:29:16,376 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:29:16" (1/1) ... [2018-10-26 22:29:16,396 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-26 22:29:16,397 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 22:29:16,397 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 22:29:16,397 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 22:29:16,407 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:29:16" (1/1) ... [2018-10-26 22:29:16,407 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:29:16" (1/1) ... [2018-10-26 22:29:16,408 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:29:16" (1/1) ... [2018-10-26 22:29:16,408 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:29:16" (1/1) ... [2018-10-26 22:29:16,410 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:29:16" (1/1) ... [2018-10-26 22:29:16,416 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:29:16" (1/1) ... [2018-10-26 22:29:16,417 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:29:16" (1/1) ... [2018-10-26 22:29:16,418 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 22:29:16,418 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 22:29:16,419 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 22:29:16,419 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 22:29:16,420 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:29:16" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 22:29:16,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 22:29:16,552 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 22:29:16,791 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 22:29:16,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:29:16 BoogieIcfgContainer [2018-10-26 22:29:16,792 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 22:29:16,794 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 22:29:16,800 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 22:29:16,809 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 22:29:16,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 10:29:16" (1/3) ... [2018-10-26 22:29:16,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d1d5e7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:29:16, skipping insertion in model container [2018-10-26 22:29:16,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:29:16" (2/3) ... [2018-10-26 22:29:16,811 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d1d5e7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:29:16, skipping insertion in model container [2018-10-26 22:29:16,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:29:16" (3/3) ... [2018-10-26 22:29:16,815 INFO L112 eAbstractionObserver]: Analyzing ICFG half_2_true-unreach-call_true-termination.i [2018-10-26 22:29:16,839 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 22:29:16,858 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 22:29:16,891 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 22:29:16,930 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-26 22:29:16,931 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 22:29:16,931 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 22:29:16,931 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 22:29:16,931 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 22:29:16,931 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 22:29:16,932 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 22:29:16,932 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 22:29:16,932 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 22:29:16,946 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2018-10-26 22:29:16,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-26 22:29:16,952 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:29:16,953 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:29:16,955 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:29:16,961 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:29:16,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1475821806, now seen corresponding path program 1 times [2018-10-26 22:29:16,964 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:29:16,964 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:29:17,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:29:17,015 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:29:17,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:29:17,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:29:17,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:29:17,089 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 22:29:17,089 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-26 22:29:17,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-26 22:29:17,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-26 22:29:17,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-26 22:29:17,108 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 2 states. [2018-10-26 22:29:17,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:29:17,125 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2018-10-26 22:29:17,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-26 22:29:17,126 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2018-10-26 22:29:17,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:29:17,135 INFO L225 Difference]: With dead ends: 27 [2018-10-26 22:29:17,135 INFO L226 Difference]: Without dead ends: 12 [2018-10-26 22:29:17,139 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-26 22:29:17,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-26 22:29:17,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-26 22:29:17,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-26 22:29:17,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2018-10-26 22:29:17,175 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 9 [2018-10-26 22:29:17,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:29:17,176 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2018-10-26 22:29:17,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-26 22:29:17,176 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2018-10-26 22:29:17,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-26 22:29:17,177 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:29:17,177 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:29:17,177 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:29:17,178 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:29:17,178 INFO L82 PathProgramCache]: Analyzing trace with hash -179909771, now seen corresponding path program 1 times [2018-10-26 22:29:17,178 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:29:17,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:29:17,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:29:17,180 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:29:17,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:29:17,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:29:17,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:29:17,479 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 22:29:17,479 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-26 22:29:17,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 22:29:17,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 22:29:17,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-26 22:29:17,482 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 5 states. [2018-10-26 22:29:17,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:29:17,644 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2018-10-26 22:29:17,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 22:29:17,644 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2018-10-26 22:29:17,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:29:17,646 INFO L225 Difference]: With dead ends: 23 [2018-10-26 22:29:17,646 INFO L226 Difference]: Without dead ends: 14 [2018-10-26 22:29:17,647 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-10-26 22:29:17,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-26 22:29:17,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-26 22:29:17,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-26 22:29:17,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-10-26 22:29:17,652 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2018-10-26 22:29:17,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:29:17,652 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-10-26 22:29:17,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 22:29:17,653 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-10-26 22:29:17,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-26 22:29:17,653 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:29:17,654 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:29:17,654 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:29:17,654 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:29:17,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1810121807, now seen corresponding path program 1 times [2018-10-26 22:29:17,655 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:29:17,655 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:29:17,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:29:17,656 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:29:17,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:29:17,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:29:17,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:29:17,876 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:29:17,877 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:29:17,898 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:29:17,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:29:17,922 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:29:18,134 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-10-26 22:29:18,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:29:18,244 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:29:18,244 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-10-26 22:29:18,245 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-26 22:29:18,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-26 22:29:18,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-10-26 22:29:18,246 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 7 states. [2018-10-26 22:29:18,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:29:18,435 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2018-10-26 22:29:18,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-26 22:29:18,435 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-10-26 22:29:18,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:29:18,438 INFO L225 Difference]: With dead ends: 27 [2018-10-26 22:29:18,438 INFO L226 Difference]: Without dead ends: 16 [2018-10-26 22:29:18,439 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-10-26 22:29:18,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-26 22:29:18,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-26 22:29:18,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-26 22:29:18,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2018-10-26 22:29:18,445 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2018-10-26 22:29:18,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:29:18,445 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2018-10-26 22:29:18,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-26 22:29:18,445 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2018-10-26 22:29:18,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-26 22:29:18,446 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:29:18,446 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:29:18,446 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:29:18,447 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:29:18,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1324945751, now seen corresponding path program 2 times [2018-10-26 22:29:18,448 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:29:18,448 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:29:18,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:29:18,449 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:29:18,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:29:18,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:29:18,525 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:29:18,525 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:29:18,525 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:29:18,534 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:29:18,576 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:29:18,576 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:29:18,578 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:29:18,819 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:29:18,840 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:29:18,840 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-10-26 22:29:18,841 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-26 22:29:18,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-26 22:29:18,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-10-26 22:29:18,842 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 8 states. [2018-10-26 22:29:18,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:29:18,994 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2018-10-26 22:29:18,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-26 22:29:18,997 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-10-26 22:29:18,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:29:18,997 INFO L225 Difference]: With dead ends: 28 [2018-10-26 22:29:18,998 INFO L226 Difference]: Without dead ends: 26 [2018-10-26 22:29:18,998 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2018-10-26 22:29:18,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-26 22:29:19,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 19. [2018-10-26 22:29:19,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-26 22:29:19,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-10-26 22:29:19,004 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2018-10-26 22:29:19,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:29:19,004 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-10-26 22:29:19,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-26 22:29:19,005 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-10-26 22:29:19,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-26 22:29:19,005 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:29:19,006 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:29:19,006 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:29:19,006 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:29:19,006 INFO L82 PathProgramCache]: Analyzing trace with hash -367652814, now seen corresponding path program 1 times [2018-10-26 22:29:19,007 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:29:19,007 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:29:19,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:29:19,008 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:29:19,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:29:19,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:29:19,611 WARN L179 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2018-10-26 22:29:19,774 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:29:19,775 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:29:19,775 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:29:19,797 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:29:19,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:29:19,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:29:20,079 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:29:20,100 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:29:20,100 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2018-10-26 22:29:20,100 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-26 22:29:20,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-26 22:29:20,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2018-10-26 22:29:20,101 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 16 states. [2018-10-26 22:29:20,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:29:20,488 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2018-10-26 22:29:20,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-26 22:29:20,489 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2018-10-26 22:29:20,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:29:20,490 INFO L225 Difference]: With dead ends: 36 [2018-10-26 22:29:20,490 INFO L226 Difference]: Without dead ends: 21 [2018-10-26 22:29:20,491 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2018-10-26 22:29:20,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-26 22:29:20,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-26 22:29:20,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-26 22:29:20,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-10-26 22:29:20,495 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2018-10-26 22:29:20,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:29:20,496 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-10-26 22:29:20,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-26 22:29:20,496 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-10-26 22:29:20,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-26 22:29:20,497 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:29:20,497 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:29:20,497 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:29:20,498 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:29:20,498 INFO L82 PathProgramCache]: Analyzing trace with hash -905834740, now seen corresponding path program 2 times [2018-10-26 22:29:20,498 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:29:20,498 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:29:20,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:29:20,499 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:29:20,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:29:20,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:29:20,654 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:29:20,654 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:29:20,654 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:29:20,668 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:29:20,681 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:29:20,681 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:29:20,683 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:29:20,800 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:29:20,821 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:29:20,821 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2018-10-26 22:29:20,822 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-26 22:29:20,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-26 22:29:20,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2018-10-26 22:29:20,822 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 13 states. [2018-10-26 22:29:20,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:29:20,997 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2018-10-26 22:29:21,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-26 22:29:21,002 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2018-10-26 22:29:21,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:29:21,002 INFO L225 Difference]: With dead ends: 34 [2018-10-26 22:29:21,003 INFO L226 Difference]: Without dead ends: 32 [2018-10-26 22:29:21,003 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2018-10-26 22:29:21,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-26 22:29:21,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2018-10-26 22:29:21,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-26 22:29:21,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-10-26 22:29:21,008 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 20 [2018-10-26 22:29:21,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:29:21,009 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-10-26 22:29:21,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-26 22:29:21,009 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-10-26 22:29:21,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-26 22:29:21,010 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:29:21,010 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:29:21,010 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:29:21,011 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:29:21,011 INFO L82 PathProgramCache]: Analyzing trace with hash -705411307, now seen corresponding path program 3 times [2018-10-26 22:29:21,011 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:29:21,011 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:29:21,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:29:21,012 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:29:21,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:29:21,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:29:21,569 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:29:21,570 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:29:21,570 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:29:21,577 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:29:21,629 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-26 22:29:21,629 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:29:21,632 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:29:21,998 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:29:22,019 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:29:22,019 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2018-10-26 22:29:22,020 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-26 22:29:22,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-26 22:29:22,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2018-10-26 22:29:22,021 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 22 states. [2018-10-26 22:29:22,349 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 7 [2018-10-26 22:29:23,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:29:23,261 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2018-10-26 22:29:23,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-26 22:29:23,261 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 24 [2018-10-26 22:29:23,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:29:23,263 INFO L225 Difference]: With dead ends: 46 [2018-10-26 22:29:23,263 INFO L226 Difference]: Without dead ends: 27 [2018-10-26 22:29:23,265 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=163, Invalid=959, Unknown=0, NotChecked=0, Total=1122 [2018-10-26 22:29:23,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-26 22:29:23,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-26 22:29:23,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-26 22:29:23,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-10-26 22:29:23,271 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2018-10-26 22:29:23,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:29:23,271 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-10-26 22:29:23,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-26 22:29:23,271 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-10-26 22:29:23,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-26 22:29:23,272 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:29:23,272 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:29:23,273 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:29:23,273 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:29:23,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1417165423, now seen corresponding path program 4 times [2018-10-26 22:29:23,273 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:29:23,273 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:29:23,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:29:23,274 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:29:23,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:29:23,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:29:23,434 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:29:23,434 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:29:23,434 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 [2018-10-26 22:29:23,443 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:29:23,456 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:29:23,456 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:29:23,458 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:29:23,602 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:29:23,624 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:29:23,624 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2018-10-26 22:29:23,624 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-26 22:29:23,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-26 22:29:23,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2018-10-26 22:29:23,625 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 17 states. [2018-10-26 22:29:23,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:29:23,978 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2018-10-26 22:29:23,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-26 22:29:23,978 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 26 [2018-10-26 22:29:23,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:29:23,980 INFO L225 Difference]: With dead ends: 40 [2018-10-26 22:29:23,980 INFO L226 Difference]: Without dead ends: 38 [2018-10-26 22:29:23,981 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2018-10-26 22:29:23,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-26 22:29:23,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2018-10-26 22:29:23,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-26 22:29:23,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-10-26 22:29:23,987 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 26 [2018-10-26 22:29:23,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:29:23,988 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-10-26 22:29:23,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-26 22:29:23,988 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-10-26 22:29:23,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-26 22:29:23,989 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:29:23,989 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:29:23,989 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:29:23,989 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:29:23,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1731196680, now seen corresponding path program 5 times [2018-10-26 22:29:23,990 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:29:23,990 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:29:23,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:29:23,991 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:29:23,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:29:24,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:29:24,572 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:29:24,572 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:29:24,572 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 [2018-10-26 22:29:24,582 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:29:24,603 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-10-26 22:29:24,603 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:29:24,607 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:29:24,928 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:29:24,956 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:29:24,957 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2018-10-26 22:29:24,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-26 22:29:24,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-26 22:29:24,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2018-10-26 22:29:24,958 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 24 states. [2018-10-26 22:29:25,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:29:25,690 INFO L93 Difference]: Finished difference Result 56 states and 59 transitions. [2018-10-26 22:29:25,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-26 22:29:25,691 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 30 [2018-10-26 22:29:25,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:29:25,692 INFO L225 Difference]: With dead ends: 56 [2018-10-26 22:29:25,692 INFO L226 Difference]: Without dead ends: 33 [2018-10-26 22:29:25,693 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2018-10-26 22:29:25,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-26 22:29:25,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-26 22:29:25,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-26 22:29:25,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-10-26 22:29:25,698 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2018-10-26 22:29:25,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:29:25,699 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-10-26 22:29:25,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-26 22:29:25,701 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-10-26 22:29:25,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-26 22:29:25,702 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:29:25,702 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:29:25,702 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:29:25,702 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:29:25,703 INFO L82 PathProgramCache]: Analyzing trace with hash 205689042, now seen corresponding path program 6 times [2018-10-26 22:29:25,703 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:29:25,703 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:29:25,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:29:25,704 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:29:25,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:29:25,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:29:25,995 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:29:25,995 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:29:25,995 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 [2018-10-26 22:29:26,005 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:29:26,062 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-10-26 22:29:26,062 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:29:26,066 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:29:26,282 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:29:26,302 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:29:26,302 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2018-10-26 22:29:26,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-26 22:29:26,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-26 22:29:26,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2018-10-26 22:29:26,304 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 19 states. [2018-10-26 22:29:26,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:29:26,543 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2018-10-26 22:29:26,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-26 22:29:26,544 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 32 [2018-10-26 22:29:26,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:29:26,545 INFO L225 Difference]: With dead ends: 46 [2018-10-26 22:29:26,545 INFO L226 Difference]: Without dead ends: 44 [2018-10-26 22:29:26,546 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2018-10-26 22:29:26,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-26 22:29:26,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2018-10-26 22:29:26,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-26 22:29:26,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-10-26 22:29:26,552 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 32 [2018-10-26 22:29:26,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:29:26,552 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-10-26 22:29:26,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-26 22:29:26,553 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-10-26 22:29:26,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-26 22:29:26,554 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:29:26,554 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:29:26,554 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:29:26,554 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:29:26,554 INFO L82 PathProgramCache]: Analyzing trace with hash 485651931, now seen corresponding path program 7 times [2018-10-26 22:29:26,554 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:29:26,555 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:29:26,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:29:26,556 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:29:26,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:29:26,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:29:27,043 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 21 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:29:27,044 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:29:27,044 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 [2018-10-26 22:29:27,057 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:29:27,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:29:27,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:29:27,615 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:29:27,635 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:29:27,635 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2018-10-26 22:29:27,635 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-26 22:29:27,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-26 22:29:27,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2018-10-26 22:29:27,637 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 28 states. [2018-10-26 22:29:28,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:29:28,542 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2018-10-26 22:29:28,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-26 22:29:28,542 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 36 [2018-10-26 22:29:28,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:29:28,543 INFO L225 Difference]: With dead ends: 66 [2018-10-26 22:29:28,543 INFO L226 Difference]: Without dead ends: 39 [2018-10-26 22:29:28,544 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=187, Invalid=1145, Unknown=0, NotChecked=0, Total=1332 [2018-10-26 22:29:28,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-26 22:29:28,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-26 22:29:28,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-26 22:29:28,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-10-26 22:29:28,550 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2018-10-26 22:29:28,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:29:28,550 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-10-26 22:29:28,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-26 22:29:28,550 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-10-26 22:29:28,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-26 22:29:28,551 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:29:28,551 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:29:28,551 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:29:28,551 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:29:28,552 INFO L82 PathProgramCache]: Analyzing trace with hash 674378293, now seen corresponding path program 8 times [2018-10-26 22:29:28,552 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:29:28,552 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:29:28,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:29:28,553 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:29:28,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:29:28,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:29:28,846 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 30 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:29:28,846 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:29:28,846 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:29:28,855 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:29:28,874 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:29:28,874 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:29:28,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:29:29,136 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:29:29,156 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:29:29,156 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 22 [2018-10-26 22:29:29,156 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-26 22:29:29,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-26 22:29:29,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2018-10-26 22:29:29,157 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 22 states. [2018-10-26 22:29:29,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:29:29,731 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2018-10-26 22:29:29,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-26 22:29:29,731 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 38 [2018-10-26 22:29:29,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:29:29,732 INFO L225 Difference]: With dead ends: 52 [2018-10-26 22:29:29,732 INFO L226 Difference]: Without dead ends: 50 [2018-10-26 22:29:29,733 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=233, Invalid=889, Unknown=0, NotChecked=0, Total=1122 [2018-10-26 22:29:29,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-26 22:29:29,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2018-10-26 22:29:29,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-26 22:29:29,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-10-26 22:29:29,739 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 38 [2018-10-26 22:29:29,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:29:29,740 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-10-26 22:29:29,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-26 22:29:29,740 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-10-26 22:29:29,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-26 22:29:29,741 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:29:29,741 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:29:29,741 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:29:29,741 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:29:29,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1952666178, now seen corresponding path program 9 times [2018-10-26 22:29:29,741 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:29:29,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:29:29,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:29:29,742 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:29:29,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:29:29,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:29:30,631 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 36 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:29:30,631 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:29:30,631 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:29:30,638 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:29:30,702 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-26 22:29:30,702 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:29:30,711 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:29:31,164 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:29:31,185 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:29:31,185 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2018-10-26 22:29:31,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-26 22:29:31,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-26 22:29:31,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2018-10-26 22:29:31,187 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 34 states. [2018-10-26 22:29:32,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:29:32,504 INFO L93 Difference]: Finished difference Result 76 states and 79 transitions. [2018-10-26 22:29:32,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-26 22:29:32,504 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 42 [2018-10-26 22:29:32,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:29:32,505 INFO L225 Difference]: With dead ends: 76 [2018-10-26 22:29:32,505 INFO L226 Difference]: Without dead ends: 45 [2018-10-26 22:29:32,507 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=325, Invalid=2645, Unknown=0, NotChecked=0, Total=2970 [2018-10-26 22:29:32,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-26 22:29:32,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-26 22:29:32,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-26 22:29:32,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-10-26 22:29:32,515 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2018-10-26 22:29:32,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:29:32,515 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-10-26 22:29:32,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-26 22:29:32,516 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-10-26 22:29:32,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-26 22:29:32,516 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:29:32,517 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:29:32,517 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:29:32,517 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:29:32,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1743765864, now seen corresponding path program 10 times [2018-10-26 22:29:32,517 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:29:32,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:29:32,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:29:32,518 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:29:32,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:29:32,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:29:32,758 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 42 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:29:32,759 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:29:32,759 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:29:32,766 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:29:32,787 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:29:32,787 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:29:32,791 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:29:33,118 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:29:33,139 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:29:33,139 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 26 [2018-10-26 22:29:33,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-26 22:29:33,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-26 22:29:33,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2018-10-26 22:29:33,140 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 26 states. [2018-10-26 22:29:33,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:29:33,725 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2018-10-26 22:29:33,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-26 22:29:33,726 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 44 [2018-10-26 22:29:33,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:29:33,727 INFO L225 Difference]: With dead ends: 58 [2018-10-26 22:29:33,727 INFO L226 Difference]: Without dead ends: 56 [2018-10-26 22:29:33,728 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=311, Invalid=1249, Unknown=0, NotChecked=0, Total=1560 [2018-10-26 22:29:33,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-26 22:29:33,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 49. [2018-10-26 22:29:33,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-26 22:29:33,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-10-26 22:29:33,737 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 44 [2018-10-26 22:29:33,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:29:33,737 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-10-26 22:29:33,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-26 22:29:33,737 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-10-26 22:29:33,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-26 22:29:33,738 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:29:33,738 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:29:33,738 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:29:33,739 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:29:33,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1962422111, now seen corresponding path program 11 times [2018-10-26 22:29:33,739 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:29:33,739 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:29:33,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:29:33,740 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:29:33,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:29:33,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:29:34,519 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 55 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:29:34,519 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:29:34,519 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:29:34,527 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:29:34,551 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-26 22:29:34,552 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:29:34,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:29:35,100 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:29:35,120 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:29:35,120 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2018-10-26 22:29:35,121 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-26 22:29:35,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-26 22:29:35,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2018-10-26 22:29:35,121 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 36 states. [2018-10-26 22:29:36,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:29:36,219 INFO L93 Difference]: Finished difference Result 86 states and 89 transitions. [2018-10-26 22:29:36,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-26 22:29:36,220 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 48 [2018-10-26 22:29:36,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:29:36,221 INFO L225 Difference]: With dead ends: 86 [2018-10-26 22:29:36,221 INFO L226 Difference]: Without dead ends: 51 [2018-10-26 22:29:36,223 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=288, Invalid=2064, Unknown=0, NotChecked=0, Total=2352 [2018-10-26 22:29:36,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-26 22:29:36,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-26 22:29:36,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-26 22:29:36,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-10-26 22:29:36,230 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2018-10-26 22:29:36,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:29:36,231 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-10-26 22:29:36,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-26 22:29:36,231 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-10-26 22:29:36,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-26 22:29:36,232 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:29:36,232 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:29:36,232 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:29:36,232 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:29:36,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1029843461, now seen corresponding path program 12 times [2018-10-26 22:29:36,233 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:29:36,233 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:29:36,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:29:36,233 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:29:36,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:29:36,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:29:36,753 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 56 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:29:36,753 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:29:36,754 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:29:36,768 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:29:36,794 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-26 22:29:36,794 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:29:36,797 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:29:36,980 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:29:37,000 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:29:37,000 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 28 [2018-10-26 22:29:37,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-26 22:29:37,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-26 22:29:37,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=610, Unknown=0, NotChecked=0, Total=756 [2018-10-26 22:29:37,001 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 28 states. [2018-10-26 22:29:37,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:29:37,481 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2018-10-26 22:29:37,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-26 22:29:37,482 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 50 [2018-10-26 22:29:37,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:29:37,483 INFO L225 Difference]: With dead ends: 64 [2018-10-26 22:29:37,483 INFO L226 Difference]: Without dead ends: 62 [2018-10-26 22:29:37,484 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=373, Invalid=1519, Unknown=0, NotChecked=0, Total=1892 [2018-10-26 22:29:37,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-26 22:29:37,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2018-10-26 22:29:37,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-26 22:29:37,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2018-10-26 22:29:37,494 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 50 [2018-10-26 22:29:37,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:29:37,494 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2018-10-26 22:29:37,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-26 22:29:37,494 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2018-10-26 22:29:37,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-26 22:29:37,495 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:29:37,495 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:29:37,495 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:29:37,496 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:29:37,496 INFO L82 PathProgramCache]: Analyzing trace with hash -60490108, now seen corresponding path program 13 times [2018-10-26 22:29:37,496 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:29:37,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:29:37,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:29:37,497 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:29:37,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:29:37,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:29:38,299 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 78 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:29:38,299 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:29:38,299 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:29:38,308 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:29:38,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:29:38,334 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:29:38,929 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:29:38,956 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:29:38,956 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2018-10-26 22:29:38,956 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-26 22:29:38,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-26 22:29:38,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1369, Unknown=0, NotChecked=0, Total=1560 [2018-10-26 22:29:38,957 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 40 states. [2018-10-26 22:29:40,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:29:40,503 INFO L93 Difference]: Finished difference Result 96 states and 99 transitions. [2018-10-26 22:29:40,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-26 22:29:40,503 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 54 [2018-10-26 22:29:40,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:29:40,504 INFO L225 Difference]: With dead ends: 96 [2018-10-26 22:29:40,504 INFO L226 Difference]: Without dead ends: 57 [2018-10-26 22:29:40,505 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=346, Invalid=2624, Unknown=0, NotChecked=0, Total=2970 [2018-10-26 22:29:40,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-26 22:29:40,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-26 22:29:40,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-26 22:29:40,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-10-26 22:29:40,513 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2018-10-26 22:29:40,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:29:40,513 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-10-26 22:29:40,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-26 22:29:40,514 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-10-26 22:29:40,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-26 22:29:40,514 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:29:40,514 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:29:40,515 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:29:40,515 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:29:40,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1013704610, now seen corresponding path program 14 times [2018-10-26 22:29:40,515 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:29:40,515 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:29:40,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:29:40,516 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:29:40,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:29:40,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:29:41,210 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 72 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:29:41,211 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:29:41,211 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:29:41,219 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:29:41,240 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:29:41,241 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:29:41,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:29:41,455 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 195 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:29:41,484 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:29:41,484 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 31 [2018-10-26 22:29:41,485 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-26 22:29:41,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-26 22:29:41,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=753, Unknown=0, NotChecked=0, Total=930 [2018-10-26 22:29:41,486 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 31 states. [2018-10-26 22:29:42,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:29:42,043 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2018-10-26 22:29:42,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-26 22:29:42,043 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 56 [2018-10-26 22:29:42,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:29:42,044 INFO L225 Difference]: With dead ends: 70 [2018-10-26 22:29:42,044 INFO L226 Difference]: Without dead ends: 68 [2018-10-26 22:29:42,045 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=455, Invalid=1897, Unknown=0, NotChecked=0, Total=2352 [2018-10-26 22:29:42,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-26 22:29:42,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2018-10-26 22:29:42,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-26 22:29:42,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2018-10-26 22:29:42,054 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 56 [2018-10-26 22:29:42,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:29:42,055 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2018-10-26 22:29:42,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-26 22:29:42,055 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2018-10-26 22:29:42,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-26 22:29:42,056 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:29:42,057 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:29:42,057 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:29:42,057 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:29:42,058 INFO L82 PathProgramCache]: Analyzing trace with hash 970807143, now seen corresponding path program 15 times [2018-10-26 22:29:42,058 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:29:42,058 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:29:42,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:29:42,059 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:29:42,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:29:42,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:29:42,897 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 105 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:29:42,897 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:29:42,897 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:29:42,905 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:29:42,936 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-26 22:29:42,937 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:29:42,939 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:29:43,705 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:29:43,725 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:29:43,725 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 45 [2018-10-26 22:29:43,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-26 22:29:43,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-26 22:29:43,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1692, Unknown=0, NotChecked=0, Total=1980 [2018-10-26 22:29:43,727 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 45 states. [2018-10-26 22:29:45,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:29:45,130 INFO L93 Difference]: Finished difference Result 106 states and 109 transitions. [2018-10-26 22:29:45,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-26 22:29:45,131 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 60 [2018-10-26 22:29:45,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:29:45,132 INFO L225 Difference]: With dead ends: 106 [2018-10-26 22:29:45,132 INFO L226 Difference]: Without dead ends: 63 [2018-10-26 22:29:45,135 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=527, Invalid=3633, Unknown=0, NotChecked=0, Total=4160 [2018-10-26 22:29:45,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-26 22:29:45,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-26 22:29:45,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-26 22:29:45,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-10-26 22:29:45,144 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 60 [2018-10-26 22:29:45,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:29:45,144 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-10-26 22:29:45,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-26 22:29:45,144 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-10-26 22:29:45,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-26 22:29:45,145 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:29:45,145 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:29:45,145 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:29:45,146 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:29:45,146 INFO L82 PathProgramCache]: Analyzing trace with hash 698623425, now seen corresponding path program 16 times [2018-10-26 22:29:45,146 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:29:45,146 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:29:45,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:29:45,147 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:29:45,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:29:45,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:29:45,514 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 90 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:29:45,515 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:29:45,515 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:29:45,523 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:29:45,567 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:29:45,567 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:29:45,569 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:29:46,028 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:29:46,049 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:29:46,049 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 35 [2018-10-26 22:29:46,050 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-26 22:29:46,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-26 22:29:46,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=965, Unknown=0, NotChecked=0, Total=1190 [2018-10-26 22:29:46,051 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 35 states. [2018-10-26 22:29:46,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:29:46,640 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2018-10-26 22:29:46,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-26 22:29:46,641 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 62 [2018-10-26 22:29:46,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:29:46,641 INFO L225 Difference]: With dead ends: 76 [2018-10-26 22:29:46,642 INFO L226 Difference]: Without dead ends: 74 [2018-10-26 22:29:46,643 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=560, Invalid=2410, Unknown=0, NotChecked=0, Total=2970 [2018-10-26 22:29:46,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-26 22:29:46,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 67. [2018-10-26 22:29:46,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-26 22:29:46,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-10-26 22:29:46,651 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 62 [2018-10-26 22:29:46,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:29:46,651 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-10-26 22:29:46,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-26 22:29:46,651 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-10-26 22:29:46,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-26 22:29:46,652 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:29:46,652 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:29:46,652 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:29:46,652 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:29:46,653 INFO L82 PathProgramCache]: Analyzing trace with hash -728630454, now seen corresponding path program 17 times [2018-10-26 22:29:46,653 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:29:46,653 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:29:46,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:29:46,654 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:29:46,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:29:46,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:29:47,485 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 136 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:29:47,485 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:29:47,485 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:29:47,492 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:29:47,533 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2018-10-26 22:29:47,534 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:29:47,536 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:29:48,295 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:29:48,315 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:29:48,316 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 48 [2018-10-26 22:29:48,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-26 22:29:48,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-26 22:29:48,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=1988, Unknown=0, NotChecked=0, Total=2256 [2018-10-26 22:29:48,317 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 48 states. [2018-10-26 22:29:49,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:29:49,811 INFO L93 Difference]: Finished difference Result 116 states and 119 transitions. [2018-10-26 22:29:49,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-26 22:29:49,811 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 66 [2018-10-26 22:29:49,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:29:49,812 INFO L225 Difference]: With dead ends: 116 [2018-10-26 22:29:49,813 INFO L226 Difference]: Without dead ends: 69 [2018-10-26 22:29:49,815 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1003 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=477, Invalid=3945, Unknown=0, NotChecked=0, Total=4422 [2018-10-26 22:29:49,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-26 22:29:49,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-26 22:29:49,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-26 22:29:49,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-10-26 22:29:49,823 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2018-10-26 22:29:49,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:29:49,824 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-10-26 22:29:49,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-26 22:29:49,824 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-10-26 22:29:49,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-26 22:29:49,824 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:29:49,824 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:29:49,825 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:29:49,825 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:29:49,825 INFO L82 PathProgramCache]: Analyzing trace with hash 880221732, now seen corresponding path program 18 times [2018-10-26 22:29:49,825 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:29:49,825 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:29:49,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:29:49,826 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:29:49,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:29:49,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:29:50,923 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 110 proven. 193 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:29:50,923 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:29:50,924 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:29:50,931 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:29:50,969 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2018-10-26 22:29:50,969 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:29:50,971 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:29:52,686 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 0 proven. 303 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:29:52,706 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:29:52,706 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 37 [2018-10-26 22:29:52,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-26 22:29:52,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-26 22:29:52,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1084, Unknown=0, NotChecked=0, Total=1332 [2018-10-26 22:29:52,707 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 37 states. [2018-10-26 22:29:53,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:29:53,532 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2018-10-26 22:29:53,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-26 22:29:53,536 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 68 [2018-10-26 22:29:53,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:29:53,537 INFO L225 Difference]: With dead ends: 82 [2018-10-26 22:29:53,537 INFO L226 Difference]: Without dead ends: 80 [2018-10-26 22:29:53,538 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=643, Invalid=2779, Unknown=0, NotChecked=0, Total=3422 [2018-10-26 22:29:53,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-10-26 22:29:53,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 73. [2018-10-26 22:29:53,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-26 22:29:53,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2018-10-26 22:29:53,546 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 68 [2018-10-26 22:29:53,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:29:53,546 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2018-10-26 22:29:53,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-26 22:29:53,546 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2018-10-26 22:29:53,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-26 22:29:53,547 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:29:53,547 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:29:53,547 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:29:53,548 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:29:53,548 INFO L82 PathProgramCache]: Analyzing trace with hash -761525715, now seen corresponding path program 19 times [2018-10-26 22:29:53,548 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:29:53,548 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:29:53,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:29:53,549 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:29:53,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:29:53,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:29:54,505 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 171 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:29:54,506 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:29:54,506 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:29:54,513 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:29:54,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:29:54,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:29:55,536 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:29:55,556 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:29:55,556 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 52 [2018-10-26 22:29:55,556 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-26 22:29:55,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-26 22:29:55,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=2350, Unknown=0, NotChecked=0, Total=2652 [2018-10-26 22:29:55,558 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 52 states. [2018-10-26 22:29:57,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:29:57,253 INFO L93 Difference]: Finished difference Result 126 states and 129 transitions. [2018-10-26 22:29:57,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-26 22:29:57,260 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 72 [2018-10-26 22:29:57,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:29:57,260 INFO L225 Difference]: With dead ends: 126 [2018-10-26 22:29:57,260 INFO L226 Difference]: Without dead ends: 75 [2018-10-26 22:29:57,262 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1208 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=550, Invalid=4706, Unknown=0, NotChecked=0, Total=5256 [2018-10-26 22:29:57,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-26 22:29:57,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-26 22:29:57,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-26 22:29:57,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-10-26 22:29:57,271 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2018-10-26 22:29:57,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:29:57,271 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-10-26 22:29:57,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-26 22:29:57,271 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-10-26 22:29:57,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-26 22:29:57,271 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:29:57,272 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:29:57,272 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:29:57,272 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:29:57,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1834081913, now seen corresponding path program 20 times [2018-10-26 22:29:57,272 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:29:57,272 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:29:57,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:29:57,273 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:29:57,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:29:57,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:29:57,844 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 132 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:29:57,845 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:29:57,845 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:29:57,854 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:29:57,884 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:29:57,884 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:29:57,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:29:58,211 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:29:58,231 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:29:58,231 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 40 [2018-10-26 22:29:58,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-26 22:29:58,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-26 22:29:58,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1272, Unknown=0, NotChecked=0, Total=1560 [2018-10-26 22:29:58,233 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 40 states. [2018-10-26 22:29:58,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:29:58,988 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2018-10-26 22:29:58,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-26 22:29:58,988 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 74 [2018-10-26 22:29:58,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:29:58,989 INFO L225 Difference]: With dead ends: 88 [2018-10-26 22:29:58,990 INFO L226 Difference]: Without dead ends: 86 [2018-10-26 22:29:58,991 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=749, Invalid=3283, Unknown=0, NotChecked=0, Total=4032 [2018-10-26 22:29:58,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-26 22:29:59,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 79. [2018-10-26 22:29:59,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-26 22:29:59,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2018-10-26 22:29:59,002 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 74 [2018-10-26 22:29:59,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:29:59,002 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2018-10-26 22:29:59,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-26 22:29:59,002 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2018-10-26 22:29:59,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-26 22:29:59,003 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:29:59,003 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:29:59,003 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:29:59,004 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:29:59,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1829544976, now seen corresponding path program 21 times [2018-10-26 22:29:59,004 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:29:59,004 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:29:59,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:29:59,005 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:29:59,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:29:59,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:30:01,130 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 210 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:30:01,131 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:30:01,131 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:30:01,137 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:30:01,179 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2018-10-26 22:30:01,179 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:30:01,181 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:30:02,080 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 0 proven. 409 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:30:02,101 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:30:02,101 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 57 [2018-10-26 22:30:02,101 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-26 22:30:02,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-26 22:30:02,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=2727, Unknown=0, NotChecked=0, Total=3192 [2018-10-26 22:30:02,102 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 57 states. [2018-10-26 22:30:03,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:30:03,950 INFO L93 Difference]: Finished difference Result 136 states and 139 transitions. [2018-10-26 22:30:03,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-26 22:30:03,952 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 78 [2018-10-26 22:30:03,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:30:03,953 INFO L225 Difference]: With dead ends: 136 [2018-10-26 22:30:03,953 INFO L226 Difference]: Without dead ends: 81 [2018-10-26 22:30:03,954 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2059 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=815, Invalid=5991, Unknown=0, NotChecked=0, Total=6806 [2018-10-26 22:30:03,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-26 22:30:03,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-26 22:30:03,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-26 22:30:03,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-10-26 22:30:03,963 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 78 [2018-10-26 22:30:03,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:30:03,963 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-10-26 22:30:03,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-26 22:30:03,963 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-10-26 22:30:03,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-26 22:30:03,964 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:30:03,964 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:30:03,964 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:30:03,965 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:30:03,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1612558358, now seen corresponding path program 22 times [2018-10-26 22:30:03,965 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:30:03,965 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:30:03,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:30:03,966 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:30:03,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:30:03,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:30:04,331 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 156 proven. 279 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:30:04,332 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:30:04,332 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:30:04,339 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:30:04,372 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:30:04,372 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:30:04,375 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:30:05,094 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:30:05,114 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:30:05,114 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 44 [2018-10-26 22:30:05,115 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-26 22:30:05,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-26 22:30:05,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=1544, Unknown=0, NotChecked=0, Total=1892 [2018-10-26 22:30:05,115 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 44 states. [2018-10-26 22:30:05,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:30:05,978 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2018-10-26 22:30:05,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-26 22:30:05,978 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 80 [2018-10-26 22:30:05,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:30:05,979 INFO L225 Difference]: With dead ends: 94 [2018-10-26 22:30:05,979 INFO L226 Difference]: Without dead ends: 92 [2018-10-26 22:30:05,980 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=881, Invalid=3949, Unknown=0, NotChecked=0, Total=4830 [2018-10-26 22:30:05,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-26 22:30:05,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 85. [2018-10-26 22:30:05,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-26 22:30:05,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2018-10-26 22:30:05,992 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 80 [2018-10-26 22:30:05,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:30:05,992 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2018-10-26 22:30:05,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-26 22:30:05,992 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2018-10-26 22:30:05,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-26 22:30:05,993 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:30:05,993 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:30:05,993 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:30:05,993 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:30:05,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1307371763, now seen corresponding path program 23 times [2018-10-26 22:30:05,993 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:30:05,993 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:30:05,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:30:05,994 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:30:05,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:30:06,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:30:07,041 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 253 proven. 229 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:30:07,042 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:30:07,042 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:30:07,049 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:30:07,096 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2018-10-26 22:30:07,096 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:30:07,101 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:30:08,316 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 0 proven. 482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:30:08,337 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:30:08,337 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 60 [2018-10-26 22:30:08,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-26 22:30:08,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-26 22:30:08,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=400, Invalid=3140, Unknown=0, NotChecked=0, Total=3540 [2018-10-26 22:30:08,338 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 60 states. [2018-10-26 22:30:10,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:30:10,293 INFO L93 Difference]: Finished difference Result 146 states and 149 transitions. [2018-10-26 22:30:10,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-26 22:30:10,294 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 84 [2018-10-26 22:30:10,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:30:10,295 INFO L225 Difference]: With dead ends: 146 [2018-10-26 22:30:10,295 INFO L226 Difference]: Without dead ends: 87 [2018-10-26 22:30:10,297 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1675 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=711, Invalid=6429, Unknown=0, NotChecked=0, Total=7140 [2018-10-26 22:30:10,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-26 22:30:10,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-10-26 22:30:10,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-26 22:30:10,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2018-10-26 22:30:10,309 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 84 [2018-10-26 22:30:10,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:30:10,309 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2018-10-26 22:30:10,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-26 22:30:10,309 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2018-10-26 22:30:10,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-26 22:30:10,310 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:30:10,310 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:30:10,310 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:30:10,310 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:30:10,310 INFO L82 PathProgramCache]: Analyzing trace with hash 581224781, now seen corresponding path program 24 times [2018-10-26 22:30:10,310 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:30:10,310 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:30:10,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:30:10,311 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:30:10,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:30:10,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:30:10,927 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 182 proven. 328 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:30:10,927 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:30:10,928 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:30:10,934 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:30:10,986 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2018-10-26 22:30:10,986 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:30:10,989 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:30:11,422 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 0 proven. 510 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:30:11,442 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:30:11,442 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 46 [2018-10-26 22:30:11,443 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-26 22:30:11,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-26 22:30:11,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=1693, Unknown=0, NotChecked=0, Total=2070 [2018-10-26 22:30:11,443 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 46 states. [2018-10-26 22:30:12,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:30:12,517 INFO L93 Difference]: Finished difference Result 100 states and 101 transitions. [2018-10-26 22:30:12,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-26 22:30:12,517 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 86 [2018-10-26 22:30:12,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:30:12,518 INFO L225 Difference]: With dead ends: 100 [2018-10-26 22:30:12,519 INFO L226 Difference]: Without dead ends: 98 [2018-10-26 22:30:12,520 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1263 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=985, Invalid=4417, Unknown=0, NotChecked=0, Total=5402 [2018-10-26 22:30:12,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-26 22:30:12,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 91. [2018-10-26 22:30:12,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-26 22:30:12,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2018-10-26 22:30:12,532 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 86 [2018-10-26 22:30:12,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:30:12,532 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2018-10-26 22:30:12,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-26 22:30:12,532 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2018-10-26 22:30:12,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-26 22:30:12,532 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:30:12,533 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:30:12,533 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:30:12,533 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:30:12,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1312684246, now seen corresponding path program 25 times [2018-10-26 22:30:12,533 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:30:12,533 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:30:12,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:30:12,534 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:30:12,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:30:12,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:30:13,900 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 300 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:30:13,901 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:30:13,901 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:30:13,908 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:30:13,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:30:13,950 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:30:15,423 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:30:15,443 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:30:15,443 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 64 [2018-10-26 22:30:15,443 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-26 22:30:15,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-26 22:30:15,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=3592, Unknown=0, NotChecked=0, Total=4032 [2018-10-26 22:30:15,444 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 64 states. [2018-10-26 22:30:18,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:30:18,106 INFO L93 Difference]: Finished difference Result 156 states and 159 transitions. [2018-10-26 22:30:18,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-26 22:30:18,107 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 90 [2018-10-26 22:30:18,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:30:18,107 INFO L225 Difference]: With dead ends: 156 [2018-10-26 22:30:18,107 INFO L226 Difference]: Without dead ends: 93 [2018-10-26 22:30:18,109 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1937 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=799, Invalid=7391, Unknown=0, NotChecked=0, Total=8190 [2018-10-26 22:30:18,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-26 22:30:18,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-26 22:30:18,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-26 22:30:18,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2018-10-26 22:30:18,125 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 90 [2018-10-26 22:30:18,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:30:18,125 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2018-10-26 22:30:18,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-26 22:30:18,125 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2018-10-26 22:30:18,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-26 22:30:18,126 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:30:18,126 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:30:18,126 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:30:18,127 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:30:18,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1971409488, now seen corresponding path program 26 times [2018-10-26 22:30:18,127 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:30:18,127 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:30:18,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:30:18,128 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:30:18,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:30:18,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:30:18,580 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 210 proven. 381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:30:18,581 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:30:18,581 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:30:18,590 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:30:18,626 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:30:18,626 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:30:18,629 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:30:19,104 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 0 proven. 591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:30:19,123 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:30:19,123 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 49 [2018-10-26 22:30:19,124 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-26 22:30:19,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-26 22:30:19,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=426, Invalid=1926, Unknown=0, NotChecked=0, Total=2352 [2018-10-26 22:30:19,124 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 49 states. [2018-10-26 22:30:20,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:30:20,429 INFO L93 Difference]: Finished difference Result 106 states and 107 transitions. [2018-10-26 22:30:20,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-26 22:30:20,430 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 92 [2018-10-26 22:30:20,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:30:20,430 INFO L225 Difference]: With dead ends: 106 [2018-10-26 22:30:20,431 INFO L226 Difference]: Without dead ends: 104 [2018-10-26 22:30:20,431 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1451 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1115, Invalid=5047, Unknown=0, NotChecked=0, Total=6162 [2018-10-26 22:30:20,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-10-26 22:30:20,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 97. [2018-10-26 22:30:20,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-26 22:30:20,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2018-10-26 22:30:20,448 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 92 [2018-10-26 22:30:20,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:30:20,449 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2018-10-26 22:30:20,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-26 22:30:20,449 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2018-10-26 22:30:20,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-26 22:30:20,449 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:30:20,450 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:30:20,450 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:30:20,450 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:30:20,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1275530311, now seen corresponding path program 27 times [2018-10-26 22:30:20,450 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:30:20,450 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:30:20,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:30:20,451 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:30:20,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:30:20,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:30:21,737 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 351 proven. 295 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:30:21,738 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:30:21,738 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:30:21,759 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:30:21,813 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-26 22:30:21,813 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:30:21,816 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:30:23,029 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 0 proven. 646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:30:23,049 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:30:23,049 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 69 [2018-10-26 22:30:23,049 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-26 22:30:23,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-26 22:30:23,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=687, Invalid=4005, Unknown=0, NotChecked=0, Total=4692 [2018-10-26 22:30:23,050 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 69 states. [2018-10-26 22:30:25,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:30:25,996 INFO L93 Difference]: Finished difference Result 166 states and 169 transitions. [2018-10-26 22:30:25,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-26 22:30:25,997 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 96 [2018-10-26 22:30:25,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:30:25,998 INFO L225 Difference]: With dead ends: 166 [2018-10-26 22:30:25,998 INFO L226 Difference]: Without dead ends: 99 [2018-10-26 22:30:25,999 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3184 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1166, Invalid=8934, Unknown=0, NotChecked=0, Total=10100 [2018-10-26 22:30:25,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-26 22:30:26,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-10-26 22:30:26,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-26 22:30:26,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-10-26 22:30:26,013 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 96 [2018-10-26 22:30:26,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:30:26,013 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-10-26 22:30:26,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-26 22:30:26,013 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-10-26 22:30:26,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-26 22:30:26,013 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:30:26,013 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:30:26,014 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:30:26,014 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:30:26,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1376707309, now seen corresponding path program 28 times [2018-10-26 22:30:26,014 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:30:26,014 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:30:26,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:30:26,015 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:30:26,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:30:26,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:30:26,617 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 240 proven. 438 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:30:26,617 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:30:26,617 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:30:26,625 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:30:26,669 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:30:26,669 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:30:26,673 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:30:27,225 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 0 proven. 678 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:30:27,245 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:30:27,245 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 53 [2018-10-26 22:30:27,245 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-26 22:30:27,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-26 22:30:27,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=2258, Unknown=0, NotChecked=0, Total=2756 [2018-10-26 22:30:27,246 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 53 states. [2018-10-26 22:30:28,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:30:28,397 INFO L93 Difference]: Finished difference Result 112 states and 113 transitions. [2018-10-26 22:30:28,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-26 22:30:28,398 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 98 [2018-10-26 22:30:28,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:30:28,399 INFO L225 Difference]: With dead ends: 112 [2018-10-26 22:30:28,399 INFO L226 Difference]: Without dead ends: 110 [2018-10-26 22:30:28,400 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1743 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1274, Invalid=5866, Unknown=0, NotChecked=0, Total=7140 [2018-10-26 22:30:28,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-26 22:30:28,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 103. [2018-10-26 22:30:28,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-26 22:30:28,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2018-10-26 22:30:28,417 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 98 [2018-10-26 22:30:28,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:30:28,417 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2018-10-26 22:30:28,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-26 22:30:28,418 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2018-10-26 22:30:28,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-26 22:30:28,418 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:30:28,418 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:30:28,418 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:30:28,418 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:30:28,419 INFO L82 PathProgramCache]: Analyzing trace with hash -267454052, now seen corresponding path program 29 times [2018-10-26 22:30:28,419 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:30:28,419 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:30:28,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:30:28,419 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:30:28,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:30:28,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:30:29,794 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 406 proven. 331 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:30:29,794 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:30:29,794 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:30:29,803 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:30:29,857 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2018-10-26 22:30:29,857 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:30:29,861 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:30:31,567 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:30:31,587 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:30:31,587 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 72 [2018-10-26 22:30:31,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-26 22:30:31,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-26 22:30:31,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=559, Invalid=4553, Unknown=0, NotChecked=0, Total=5112 [2018-10-26 22:30:31,588 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 72 states. [2018-10-26 22:30:34,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:30:34,867 INFO L93 Difference]: Finished difference Result 176 states and 179 transitions. [2018-10-26 22:30:34,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-26 22:30:34,867 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 102 [2018-10-26 22:30:34,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:30:34,868 INFO L225 Difference]: With dead ends: 176 [2018-10-26 22:30:34,868 INFO L226 Difference]: Without dead ends: 105 [2018-10-26 22:30:34,869 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2518 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=990, Invalid=9516, Unknown=0, NotChecked=0, Total=10506 [2018-10-26 22:30:34,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-26 22:30:34,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-10-26 22:30:34,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-26 22:30:34,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2018-10-26 22:30:34,885 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 102 [2018-10-26 22:30:34,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:30:34,886 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2018-10-26 22:30:34,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-26 22:30:34,886 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2018-10-26 22:30:34,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-26 22:30:34,886 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:30:34,886 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:30:34,887 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:30:34,887 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:30:34,887 INFO L82 PathProgramCache]: Analyzing trace with hash 141899638, now seen corresponding path program 30 times [2018-10-26 22:30:34,887 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:30:34,887 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:30:34,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:30:34,888 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:30:34,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:30:34,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:30:35,605 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 272 proven. 499 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:30:35,605 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:30:35,605 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:30:35,612 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:30:35,680 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2018-10-26 22:30:35,680 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:30:35,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:30:36,297 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 0 proven. 771 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:30:36,319 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:30:36,319 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 55 [2018-10-26 22:30:36,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-26 22:30:36,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-26 22:30:36,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=2437, Unknown=0, NotChecked=0, Total=2970 [2018-10-26 22:30:36,321 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 55 states. [2018-10-26 22:30:37,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:30:37,769 INFO L93 Difference]: Finished difference Result 118 states and 119 transitions. [2018-10-26 22:30:37,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-26 22:30:37,769 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 104 [2018-10-26 22:30:37,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:30:37,770 INFO L225 Difference]: With dead ends: 118 [2018-10-26 22:30:37,770 INFO L226 Difference]: Without dead ends: 116 [2018-10-26 22:30:37,771 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1866 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1399, Invalid=6433, Unknown=0, NotChecked=0, Total=7832 [2018-10-26 22:30:37,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-10-26 22:30:37,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 109. [2018-10-26 22:30:37,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-26 22:30:37,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2018-10-26 22:30:37,790 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 104 [2018-10-26 22:30:37,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:30:37,790 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2018-10-26 22:30:37,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-26 22:30:37,790 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2018-10-26 22:30:37,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-26 22:30:37,791 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:30:37,791 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:30:37,791 INFO L424 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:30:37,791 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:30:37,791 INFO L82 PathProgramCache]: Analyzing trace with hash -597087617, now seen corresponding path program 31 times [2018-10-26 22:30:37,791 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:30:37,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:30:37,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:30:37,792 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:30:37,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:30:37,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:30:39,811 INFO L134 CoverageAnalysis]: Checked inductivity of 834 backedges. 465 proven. 369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:30:39,811 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:30:39,811 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:30:39,818 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:30:39,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:30:39,868 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:30:42,160 INFO L134 CoverageAnalysis]: Checked inductivity of 834 backedges. 0 proven. 834 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:30:42,180 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:30:42,180 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 76 [2018-10-26 22:30:42,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-26 22:30:42,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-26 22:30:42,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=605, Invalid=5095, Unknown=0, NotChecked=0, Total=5700 [2018-10-26 22:30:42,181 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 76 states. [2018-10-26 22:30:45,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:30:45,653 INFO L93 Difference]: Finished difference Result 186 states and 189 transitions. [2018-10-26 22:30:45,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-26 22:30:45,653 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 108 [2018-10-26 22:30:45,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:30:45,654 INFO L225 Difference]: With dead ends: 186 [2018-10-26 22:30:45,654 INFO L226 Difference]: Without dead ends: 111 [2018-10-26 22:30:45,655 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2837 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1093, Invalid=10679, Unknown=0, NotChecked=0, Total=11772 [2018-10-26 22:30:45,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-26 22:30:45,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-10-26 22:30:45,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-26 22:30:45,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2018-10-26 22:30:45,675 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 108 [2018-10-26 22:30:45,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:30:45,675 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2018-10-26 22:30:45,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-26 22:30:45,676 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2018-10-26 22:30:45,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-26 22:30:45,676 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:30:45,676 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:30:45,677 INFO L424 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:30:45,677 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:30:45,677 INFO L82 PathProgramCache]: Analyzing trace with hash 2021399769, now seen corresponding path program 32 times [2018-10-26 22:30:45,677 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:30:45,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:30:45,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:30:45,678 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:30:45,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:30:45,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:30:46,357 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 306 proven. 564 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:30:46,358 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:30:46,358 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:30:46,364 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:30:46,417 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:30:46,417 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:30:46,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:30:47,438 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:30:47,458 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:30:47,458 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 58 [2018-10-26 22:30:47,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-26 22:30:47,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-26 22:30:47,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=591, Invalid=2715, Unknown=0, NotChecked=0, Total=3306 [2018-10-26 22:30:47,459 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 58 states. [2018-10-26 22:30:48,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:30:48,858 INFO L93 Difference]: Finished difference Result 124 states and 125 transitions. [2018-10-26 22:30:48,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-26 22:30:48,860 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 110 [2018-10-26 22:30:48,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:30:48,861 INFO L225 Difference]: With dead ends: 124 [2018-10-26 22:30:48,861 INFO L226 Difference]: Without dead ends: 122 [2018-10-26 22:30:48,862 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2093 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1553, Invalid=7189, Unknown=0, NotChecked=0, Total=8742 [2018-10-26 22:30:48,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-10-26 22:30:48,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 115. [2018-10-26 22:30:48,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-26 22:30:48,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2018-10-26 22:30:48,882 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 110 [2018-10-26 22:30:48,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:30:48,883 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2018-10-26 22:30:48,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-26 22:30:48,883 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2018-10-26 22:30:48,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-26 22:30:48,883 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:30:48,884 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:30:48,884 INFO L424 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:30:48,884 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:30:48,884 INFO L82 PathProgramCache]: Analyzing trace with hash 2045290082, now seen corresponding path program 33 times [2018-10-26 22:30:48,884 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:30:48,884 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:30:48,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:30:48,885 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:30:48,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:30:48,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:30:50,444 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 528 proven. 409 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:30:50,444 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:30:50,444 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:30:50,452 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:30:50,521 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2018-10-26 22:30:50,521 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:30:50,524 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:30:52,224 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 0 proven. 937 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:30:52,244 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:30:52,244 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 81 [2018-10-26 22:30:52,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-26 22:30:52,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-26 22:30:52,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=954, Invalid=5526, Unknown=0, NotChecked=0, Total=6480 [2018-10-26 22:30:52,245 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 81 states. [2018-10-26 22:30:56,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:30:56,653 INFO L93 Difference]: Finished difference Result 196 states and 199 transitions. [2018-10-26 22:30:56,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-26 22:30:56,653 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 114 [2018-10-26 22:30:56,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:30:56,654 INFO L225 Difference]: With dead ends: 196 [2018-10-26 22:30:56,654 INFO L226 Difference]: Without dead ends: 117 [2018-10-26 22:30:56,656 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4552 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1580, Invalid=12462, Unknown=0, NotChecked=0, Total=14042 [2018-10-26 22:30:56,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-26 22:30:56,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-10-26 22:30:56,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-10-26 22:30:56,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2018-10-26 22:30:56,680 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 114 [2018-10-26 22:30:56,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:30:56,681 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2018-10-26 22:30:56,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-26 22:30:56,681 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2018-10-26 22:30:56,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-26 22:30:56,681 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:30:56,681 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:30:56,682 INFO L424 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:30:56,682 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:30:56,682 INFO L82 PathProgramCache]: Analyzing trace with hash 2104421692, now seen corresponding path program 34 times [2018-10-26 22:30:56,682 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:30:56,682 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:30:56,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:30:56,683 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:30:56,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:30:56,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:30:57,662 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 342 proven. 633 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:30:57,662 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:30:57,662 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:30:57,670 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:30:57,722 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:30:57,722 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:30:57,725 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:30:58,485 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:30:58,505 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:30:58,506 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 62 [2018-10-26 22:30:58,506 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-26 22:30:58,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-26 22:30:58,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=675, Invalid=3107, Unknown=0, NotChecked=0, Total=3782 [2018-10-26 22:30:58,507 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 62 states. [2018-10-26 22:31:00,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:31:00,089 INFO L93 Difference]: Finished difference Result 130 states and 131 transitions. [2018-10-26 22:31:00,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-26 22:31:00,089 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 116 [2018-10-26 22:31:00,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:31:00,090 INFO L225 Difference]: With dead ends: 130 [2018-10-26 22:31:00,090 INFO L226 Difference]: Without dead ends: 128 [2018-10-26 22:31:00,091 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2442 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1739, Invalid=8161, Unknown=0, NotChecked=0, Total=9900 [2018-10-26 22:31:00,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-10-26 22:31:00,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 121. [2018-10-26 22:31:00,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-10-26 22:31:00,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2018-10-26 22:31:00,111 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 116 [2018-10-26 22:31:00,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:31:00,111 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2018-10-26 22:31:00,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-26 22:31:00,111 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2018-10-26 22:31:00,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-10-26 22:31:00,111 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:31:00,112 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:31:00,112 INFO L424 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:31:00,112 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:31:00,112 INFO L82 PathProgramCache]: Analyzing trace with hash 778472773, now seen corresponding path program 35 times [2018-10-26 22:31:00,112 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:31:00,112 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:31:00,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:00,113 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:31:00,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:00,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:31:02,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 595 proven. 451 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:02,109 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:31:02,110 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:31:02,117 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:31:02,191 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2018-10-26 22:31:02,192 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:31:02,197 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:31:05,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 0 proven. 1046 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:05,536 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:31:05,536 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 84 [2018-10-26 22:31:05,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-26 22:31:05,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-26 22:31:05,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=745, Invalid=6227, Unknown=0, NotChecked=0, Total=6972 [2018-10-26 22:31:05,538 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 84 states. [2018-10-26 22:31:10,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:31:10,338 INFO L93 Difference]: Finished difference Result 206 states and 209 transitions. [2018-10-26 22:31:10,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-26 22:31:10,338 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 120 [2018-10-26 22:31:10,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:31:10,339 INFO L225 Difference]: With dead ends: 206 [2018-10-26 22:31:10,339 INFO L226 Difference]: Without dead ends: 123 [2018-10-26 22:31:10,340 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3532 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=1314, Invalid=13206, Unknown=0, NotChecked=0, Total=14520 [2018-10-26 22:31:10,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-26 22:31:10,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-10-26 22:31:10,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-10-26 22:31:10,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2018-10-26 22:31:10,362 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 120 [2018-10-26 22:31:10,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:31:10,363 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2018-10-26 22:31:10,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-26 22:31:10,363 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2018-10-26 22:31:10,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-26 22:31:10,363 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:31:10,363 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:31:10,363 INFO L424 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:31:10,364 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:31:10,364 INFO L82 PathProgramCache]: Analyzing trace with hash -173094753, now seen corresponding path program 36 times [2018-10-26 22:31:10,364 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:31:10,364 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:31:10,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:10,364 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:31:10,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:10,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:31:11,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 380 proven. 706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:11,259 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:31:11,259 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:31:11,266 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:31:11,343 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2018-10-26 22:31:11,343 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:31:11,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:31:12,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 0 proven. 1086 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:12,207 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:31:12,207 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 64 [2018-10-26 22:31:12,207 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-26 22:31:12,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-26 22:31:12,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=716, Invalid=3316, Unknown=0, NotChecked=0, Total=4032 [2018-10-26 22:31:12,208 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 64 states. [2018-10-26 22:31:13,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:31:13,872 INFO L93 Difference]: Finished difference Result 136 states and 137 transitions. [2018-10-26 22:31:13,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-26 22:31:13,872 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 122 [2018-10-26 22:31:13,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:31:13,873 INFO L225 Difference]: With dead ends: 136 [2018-10-26 22:31:13,874 INFO L226 Difference]: Without dead ends: 134 [2018-10-26 22:31:13,875 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2586 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1885, Invalid=8827, Unknown=0, NotChecked=0, Total=10712 [2018-10-26 22:31:13,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-10-26 22:31:13,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 127. [2018-10-26 22:31:13,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-10-26 22:31:13,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2018-10-26 22:31:13,898 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 122 [2018-10-26 22:31:13,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:31:13,899 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2018-10-26 22:31:13,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-26 22:31:13,899 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2018-10-26 22:31:13,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-10-26 22:31:13,900 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:31:13,900 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:31:13,900 INFO L424 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:31:13,900 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:31:13,900 INFO L82 PathProgramCache]: Analyzing trace with hash -2102132952, now seen corresponding path program 37 times [2018-10-26 22:31:13,900 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:31:13,901 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:31:13,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:13,901 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:31:13,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:13,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:31:16,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 666 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:16,025 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:31:16,025 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:31:16,034 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:31:16,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:31:16,088 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:31:18,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 0 proven. 1161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:18,868 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:31:18,869 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 88 [2018-10-26 22:31:18,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-26 22:31:18,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-26 22:31:18,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=797, Invalid=6859, Unknown=0, NotChecked=0, Total=7656 [2018-10-26 22:31:18,870 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 88 states. [2018-10-26 22:31:23,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:31:23,870 INFO L93 Difference]: Finished difference Result 216 states and 219 transitions. [2018-10-26 22:31:23,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-26 22:31:23,870 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 126 [2018-10-26 22:31:23,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:31:23,871 INFO L225 Difference]: With dead ends: 216 [2018-10-26 22:31:23,871 INFO L226 Difference]: Without dead ends: 129 [2018-10-26 22:31:23,872 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3908 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=1432, Invalid=14570, Unknown=0, NotChecked=0, Total=16002 [2018-10-26 22:31:23,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-10-26 22:31:23,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-10-26 22:31:23,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-10-26 22:31:23,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2018-10-26 22:31:23,905 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 126 [2018-10-26 22:31:23,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:31:23,905 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2018-10-26 22:31:23,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-26 22:31:23,905 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2018-10-26 22:31:23,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-26 22:31:23,906 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:31:23,906 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:31:23,906 INFO L424 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:31:23,907 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:31:23,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1553256194, now seen corresponding path program 38 times [2018-10-26 22:31:23,907 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:31:23,907 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:31:23,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:23,908 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:31:23,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:23,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:31:25,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1203 backedges. 420 proven. 783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:25,043 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:31:25,044 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:31:25,051 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:31:25,115 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:31:25,115 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:31:25,118 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:31:26,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1203 backedges. 0 proven. 1203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:26,129 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:31:26,130 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 67 [2018-10-26 22:31:26,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-26 22:31:26,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-26 22:31:26,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=783, Invalid=3639, Unknown=0, NotChecked=0, Total=4422 [2018-10-26 22:31:26,131 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand 67 states. [2018-10-26 22:31:28,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:31:28,116 INFO L93 Difference]: Finished difference Result 142 states and 143 transitions. [2018-10-26 22:31:28,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-26 22:31:28,116 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 128 [2018-10-26 22:31:28,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:31:28,118 INFO L225 Difference]: With dead ends: 142 [2018-10-26 22:31:28,118 INFO L226 Difference]: Without dead ends: 140 [2018-10-26 22:31:28,119 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2852 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2063, Invalid=9709, Unknown=0, NotChecked=0, Total=11772 [2018-10-26 22:31:28,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-10-26 22:31:28,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 133. [2018-10-26 22:31:28,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-26 22:31:28,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2018-10-26 22:31:28,157 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 128 [2018-10-26 22:31:28,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:31:28,157 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2018-10-26 22:31:28,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-26 22:31:28,157 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2018-10-26 22:31:28,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-26 22:31:28,158 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:31:28,158 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:31:28,159 INFO L424 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:31:28,159 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:31:28,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1620712459, now seen corresponding path program 39 times [2018-10-26 22:31:28,159 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:31:28,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:31:28,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:28,160 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:31:28,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:28,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:31:30,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1282 backedges. 741 proven. 541 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:30,467 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:31:30,467 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:31:30,474 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:31:30,575 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-26 22:31:30,576 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:31:30,579 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:31:32,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1282 backedges. 0 proven. 1282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:32,230 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:31:32,230 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 72 [2018-10-26 22:31:32,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-26 22:31:32,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-26 22:31:32,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=862, Invalid=4250, Unknown=0, NotChecked=0, Total=5112 [2018-10-26 22:31:32,231 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 72 states. [2018-10-26 22:31:35,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:31:35,939 INFO L93 Difference]: Finished difference Result 226 states and 229 transitions. [2018-10-26 22:31:35,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-26 22:31:35,939 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 132 [2018-10-26 22:31:35,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:31:35,941 INFO L225 Difference]: With dead ends: 226 [2018-10-26 22:31:35,941 INFO L226 Difference]: Without dead ends: 135 [2018-10-26 22:31:35,942 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3104 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1604, Invalid=11278, Unknown=0, NotChecked=0, Total=12882 [2018-10-26 22:31:35,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-10-26 22:31:35,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-10-26 22:31:35,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-10-26 22:31:35,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2018-10-26 22:31:35,972 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 132 [2018-10-26 22:31:35,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:31:35,972 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2018-10-26 22:31:35,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-26 22:31:35,972 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2018-10-26 22:31:35,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-26 22:31:35,973 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:31:35,973 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:31:35,973 INFO L424 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:31:35,973 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:31:35,973 INFO L82 PathProgramCache]: Analyzing trace with hash -2005786523, now seen corresponding path program 40 times [2018-10-26 22:31:35,973 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:31:35,974 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:31:35,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:35,974 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:31:35,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:35,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:31:37,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 462 proven. 864 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:37,621 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:31:37,621 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:31:37,630 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:31:37,691 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:31:37,691 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:31:37,694 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:31:38,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:38,727 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:31:38,728 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 71 [2018-10-26 22:31:38,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-26 22:31:38,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-26 22:31:38,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=879, Invalid=4091, Unknown=0, NotChecked=0, Total=4970 [2018-10-26 22:31:38,729 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand 71 states. [2018-10-26 22:31:40,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:31:40,726 INFO L93 Difference]: Finished difference Result 148 states and 149 transitions. [2018-10-26 22:31:40,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-26 22:31:40,726 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 134 [2018-10-26 22:31:40,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:31:40,727 INFO L225 Difference]: With dead ends: 148 [2018-10-26 22:31:40,727 INFO L226 Difference]: Without dead ends: 146 [2018-10-26 22:31:40,728 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3258 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2276, Invalid=10834, Unknown=0, NotChecked=0, Total=13110 [2018-10-26 22:31:40,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-26 22:31:40,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 139. [2018-10-26 22:31:40,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-10-26 22:31:40,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2018-10-26 22:31:40,753 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 134 [2018-10-26 22:31:40,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:31:40,753 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2018-10-26 22:31:40,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-26 22:31:40,753 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2018-10-26 22:31:40,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-26 22:31:40,754 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:31:40,754 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:31:40,754 INFO L424 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:31:40,754 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:31:40,755 INFO L82 PathProgramCache]: Analyzing trace with hash -791018514, now seen corresponding path program 41 times [2018-10-26 22:31:40,755 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:31:40,755 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:31:40,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:40,755 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:31:40,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:40,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:31:43,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1409 backedges. 820 proven. 589 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:43,190 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:31:43,190 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:31:43,199 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:31:43,297 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2018-10-26 22:31:43,297 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:31:43,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:31:46,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1409 backedges. 0 proven. 1409 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:46,135 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:31:46,135 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49] total 96 [2018-10-26 22:31:46,135 INFO L460 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-26 22:31:46,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-26 22:31:46,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=958, Invalid=8162, Unknown=0, NotChecked=0, Total=9120 [2018-10-26 22:31:46,136 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand 96 states. [2018-10-26 22:31:51,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:31:51,115 INFO L93 Difference]: Finished difference Result 236 states and 239 transitions. [2018-10-26 22:31:51,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-26 22:31:51,115 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 138 [2018-10-26 22:31:51,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:31:51,116 INFO L225 Difference]: With dead ends: 236 [2018-10-26 22:31:51,116 INFO L226 Difference]: Without dead ends: 141 [2018-10-26 22:31:51,117 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4717 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1683, Invalid=17499, Unknown=0, NotChecked=0, Total=19182 [2018-10-26 22:31:51,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-26 22:31:51,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-10-26 22:31:51,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-10-26 22:31:51,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2018-10-26 22:31:51,145 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 138 [2018-10-26 22:31:51,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:31:51,145 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2018-10-26 22:31:51,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-26 22:31:51,145 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2018-10-26 22:31:51,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-10-26 22:31:51,146 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:31:51,146 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:31:51,146 INFO L424 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:31:51,147 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:31:51,147 INFO L82 PathProgramCache]: Analyzing trace with hash -393225016, now seen corresponding path program 42 times [2018-10-26 22:31:51,147 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:31:51,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:31:51,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:51,148 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:31:51,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:51,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:31:52,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1455 backedges. 506 proven. 949 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:52,967 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:31:52,967 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:31:52,975 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:31:53,068 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2018-10-26 22:31:53,069 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:31:53,073 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:31:54,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1455 backedges. 0 proven. 1455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:54,292 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:31:54,292 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48] total 73 [2018-10-26 22:31:54,293 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-26 22:31:54,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-26 22:31:54,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=926, Invalid=4330, Unknown=0, NotChecked=0, Total=5256 [2018-10-26 22:31:54,293 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 73 states. [2018-10-26 22:31:56,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:31:56,206 INFO L93 Difference]: Finished difference Result 154 states and 155 transitions. [2018-10-26 22:31:56,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-26 22:31:56,207 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 140 [2018-10-26 22:31:56,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:31:56,208 INFO L225 Difference]: With dead ends: 154 [2018-10-26 22:31:56,208 INFO L226 Difference]: Without dead ends: 152 [2018-10-26 22:31:56,209 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3423 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2443, Invalid=11599, Unknown=0, NotChecked=0, Total=14042 [2018-10-26 22:31:56,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-10-26 22:31:56,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 145. [2018-10-26 22:31:56,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-10-26 22:31:56,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2018-10-26 22:31:56,239 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 140 [2018-10-26 22:31:56,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:31:56,239 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2018-10-26 22:31:56,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-26 22:31:56,239 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2018-10-26 22:31:56,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-10-26 22:31:56,240 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:31:56,240 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:31:56,240 INFO L424 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:31:56,240 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:31:56,240 INFO L82 PathProgramCache]: Analyzing trace with hash 959239889, now seen corresponding path program 43 times [2018-10-26 22:31:56,241 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:31:56,241 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:31:56,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:56,241 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:31:56,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:31:56,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:31:58,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1542 backedges. 903 proven. 639 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:31:58,651 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:31:58,651 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:31:58,660 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:31:58,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:31:58,724 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:03,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1542 backedges. 0 proven. 1542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:03,080 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:03,081 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51] total 100 [2018-10-26 22:32:03,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-26 22:32:03,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-26 22:32:03,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1016, Invalid=8884, Unknown=0, NotChecked=0, Total=9900 [2018-10-26 22:32:03,082 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand 100 states. [2018-10-26 22:32:09,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:09,645 INFO L93 Difference]: Finished difference Result 246 states and 249 transitions. [2018-10-26 22:32:09,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-26 22:32:09,645 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 144 [2018-10-26 22:32:09,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:09,646 INFO L225 Difference]: With dead ends: 246 [2018-10-26 22:32:09,646 INFO L226 Difference]: Without dead ends: 147 [2018-10-26 22:32:09,646 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5150 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=1816, Invalid=19064, Unknown=0, NotChecked=0, Total=20880 [2018-10-26 22:32:09,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-26 22:32:09,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-10-26 22:32:09,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-10-26 22:32:09,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2018-10-26 22:32:09,676 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 144 [2018-10-26 22:32:09,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:09,676 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2018-10-26 22:32:09,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-26 22:32:09,676 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2018-10-26 22:32:09,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-26 22:32:09,676 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:09,677 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:09,677 INFO L424 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:09,677 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:09,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1127162923, now seen corresponding path program 44 times [2018-10-26 22:32:09,677 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:09,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:09,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:09,678 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:32:09,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:09,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:10,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1590 backedges. 552 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:10,565 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:10,565 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:32:10,573 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:32:10,637 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:32:10,637 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:10,641 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:11,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1590 backedges. 0 proven. 1590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:11,816 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:11,817 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50] total 76 [2018-10-26 22:32:11,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-26 22:32:11,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-26 22:32:11,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1002, Invalid=4698, Unknown=0, NotChecked=0, Total=5700 [2018-10-26 22:32:11,818 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand 76 states. [2018-10-26 22:32:14,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:14,242 INFO L93 Difference]: Finished difference Result 160 states and 161 transitions. [2018-10-26 22:32:14,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-26 22:32:14,243 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 146 [2018-10-26 22:32:14,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:14,243 INFO L225 Difference]: With dead ends: 160 [2018-10-26 22:32:14,244 INFO L226 Difference]: Without dead ends: 158 [2018-10-26 22:32:14,245 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3728 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2645, Invalid=12607, Unknown=0, NotChecked=0, Total=15252 [2018-10-26 22:32:14,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-10-26 22:32:14,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 151. [2018-10-26 22:32:14,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-10-26 22:32:14,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2018-10-26 22:32:14,275 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 146 [2018-10-26 22:32:14,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:14,275 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2018-10-26 22:32:14,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-26 22:32:14,275 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2018-10-26 22:32:14,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-10-26 22:32:14,276 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:14,276 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:14,276 INFO L424 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:14,276 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:14,277 INFO L82 PathProgramCache]: Analyzing trace with hash 440644788, now seen corresponding path program 45 times [2018-10-26 22:32:14,277 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:14,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:14,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:14,277 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:14,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:14,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:16,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 990 proven. 691 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:16,720 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:16,720 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:32:16,728 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:32:16,824 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2018-10-26 22:32:16,824 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:16,829 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:20,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:20,536 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:20,537 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 105 [2018-10-26 22:32:20,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-10-26 22:32:20,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-10-26 22:32:20,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1623, Invalid=9297, Unknown=0, NotChecked=0, Total=10920 [2018-10-26 22:32:20,538 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand 105 states. [2018-10-26 22:32:26,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:26,246 INFO L93 Difference]: Finished difference Result 256 states and 259 transitions. [2018-10-26 22:32:26,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-26 22:32:26,247 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 150 [2018-10-26 22:32:26,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:26,248 INFO L225 Difference]: With dead ends: 256 [2018-10-26 22:32:26,248 INFO L226 Difference]: Without dead ends: 153 [2018-10-26 22:32:26,249 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8017 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=2597, Invalid=21273, Unknown=0, NotChecked=0, Total=23870 [2018-10-26 22:32:26,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-10-26 22:32:26,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-10-26 22:32:26,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-10-26 22:32:26,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2018-10-26 22:32:26,285 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 150 [2018-10-26 22:32:26,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:26,285 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2018-10-26 22:32:26,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-10-26 22:32:26,285 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2018-10-26 22:32:26,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-26 22:32:26,286 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:26,286 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:26,286 INFO L424 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:26,286 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:26,286 INFO L82 PathProgramCache]: Analyzing trace with hash -209119602, now seen corresponding path program 46 times [2018-10-26 22:32:26,286 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:26,286 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:26,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:26,287 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:26,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:26,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:27,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1731 backedges. 600 proven. 1131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:27,337 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:27,337 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:32:27,345 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:32:27,401 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:32:27,401 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:27,405 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:29,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1731 backedges. 0 proven. 1731 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:29,029 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:29,029 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 80 [2018-10-26 22:32:29,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-26 22:32:29,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-26 22:32:29,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1110, Invalid=5210, Unknown=0, NotChecked=0, Total=6320 [2018-10-26 22:32:29,030 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand 80 states. [2018-10-26 22:32:31,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:31,438 INFO L93 Difference]: Finished difference Result 166 states and 167 transitions. [2018-10-26 22:32:31,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-26 22:32:31,438 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 152 [2018-10-26 22:32:31,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:31,439 INFO L225 Difference]: With dead ends: 166 [2018-10-26 22:32:31,439 INFO L226 Difference]: Without dead ends: 164 [2018-10-26 22:32:31,440 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4191 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2885, Invalid=13885, Unknown=0, NotChecked=0, Total=16770 [2018-10-26 22:32:31,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-10-26 22:32:31,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 157. [2018-10-26 22:32:31,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-10-26 22:32:31,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2018-10-26 22:32:31,472 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 152 [2018-10-26 22:32:31,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:31,472 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2018-10-26 22:32:31,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-26 22:32:31,472 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2018-10-26 22:32:31,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-10-26 22:32:31,473 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:31,473 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:31,473 INFO L424 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:31,473 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:31,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1304935831, now seen corresponding path program 47 times [2018-10-26 22:32:31,473 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:31,473 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:31,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:31,474 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:31,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:31,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:34,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1826 backedges. 1081 proven. 745 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:34,106 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:34,107 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:32:34,124 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:32:34,223 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2018-10-26 22:32:34,223 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:34,228 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:37,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1826 backedges. 0 proven. 1826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:37,804 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:37,804 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55] total 108 [2018-10-26 22:32:37,804 INFO L460 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-10-26 22:32:37,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-10-26 22:32:37,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1198, Invalid=10358, Unknown=0, NotChecked=0, Total=11556 [2018-10-26 22:32:37,805 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand 108 states. [2018-10-26 22:32:45,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:45,560 INFO L93 Difference]: Finished difference Result 266 states and 269 transitions. [2018-10-26 22:32:45,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-26 22:32:45,560 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 156 [2018-10-26 22:32:45,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:45,561 INFO L225 Difference]: With dead ends: 266 [2018-10-26 22:32:45,561 INFO L226 Difference]: Without dead ends: 159 [2018-10-26 22:32:45,562 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6073 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=2097, Invalid=22395, Unknown=0, NotChecked=0, Total=24492 [2018-10-26 22:32:45,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-10-26 22:32:45,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-10-26 22:32:45,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-10-26 22:32:45,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2018-10-26 22:32:45,595 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 156 [2018-10-26 22:32:45,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:45,595 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2018-10-26 22:32:45,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-10-26 22:32:45,595 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2018-10-26 22:32:45,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-10-26 22:32:45,596 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:45,596 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:45,596 INFO L424 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:45,597 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:45,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1479617551, now seen corresponding path program 48 times [2018-10-26 22:32:45,597 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:45,597 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:45,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:45,598 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:45,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:45,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:46,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1878 backedges. 650 proven. 1228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:46,631 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:46,631 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:32:46,641 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:32:46,738 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2018-10-26 22:32:46,738 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:32:46,742 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:48,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1878 backedges. 0 proven. 1878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:48,074 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:48,074 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54] total 82 [2018-10-26 22:32:48,075 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-26 22:32:48,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-26 22:32:48,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1163, Invalid=5479, Unknown=0, NotChecked=0, Total=6642 [2018-10-26 22:32:48,075 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand 82 states. [2018-10-26 22:32:50,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:32:50,878 INFO L93 Difference]: Finished difference Result 172 states and 173 transitions. [2018-10-26 22:32:50,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-26 22:32:50,879 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 158 [2018-10-26 22:32:50,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:32:50,880 INFO L225 Difference]: With dead ends: 172 [2018-10-26 22:32:50,880 INFO L226 Difference]: Without dead ends: 170 [2018-10-26 22:32:50,881 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4377 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3073, Invalid=14749, Unknown=0, NotChecked=0, Total=17822 [2018-10-26 22:32:50,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-10-26 22:32:50,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 163. [2018-10-26 22:32:50,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-10-26 22:32:50,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2018-10-26 22:32:50,917 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 158 [2018-10-26 22:32:50,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:32:50,917 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2018-10-26 22:32:50,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-26 22:32:50,917 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2018-10-26 22:32:50,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-10-26 22:32:50,918 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:32:50,918 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:32:50,918 INFO L424 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:32:50,918 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:32:50,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1000730246, now seen corresponding path program 49 times [2018-10-26 22:32:50,918 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:32:50,918 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:32:50,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:50,919 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:32:50,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:32:50,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:53,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1977 backedges. 1176 proven. 801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:53,466 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:32:53,466 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:32:53,477 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:32:53,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:32:53,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:32:57,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1977 backedges. 0 proven. 1977 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:32:57,608 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:32:57,609 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57] total 112 [2018-10-26 22:32:57,609 INFO L460 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-10-26 22:32:57,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-10-26 22:32:57,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1262, Invalid=11170, Unknown=0, NotChecked=0, Total=12432 [2018-10-26 22:32:57,610 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand 112 states. [2018-10-26 22:33:05,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:05,567 INFO L93 Difference]: Finished difference Result 276 states and 279 transitions. [2018-10-26 22:33:05,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-26 22:33:05,568 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 162 [2018-10-26 22:33:05,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:05,569 INFO L225 Difference]: With dead ends: 276 [2018-10-26 22:33:05,569 INFO L226 Difference]: Without dead ends: 165 [2018-10-26 22:33:05,570 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6563 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=2245, Invalid=24161, Unknown=0, NotChecked=0, Total=26406 [2018-10-26 22:33:05,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-10-26 22:33:05,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-10-26 22:33:05,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-10-26 22:33:05,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2018-10-26 22:33:05,605 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 162 [2018-10-26 22:33:05,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:05,605 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2018-10-26 22:33:05,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-10-26 22:33:05,605 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2018-10-26 22:33:05,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-10-26 22:33:05,606 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:05,606 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:05,606 INFO L424 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:05,607 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:05,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1624671148, now seen corresponding path program 50 times [2018-10-26 22:33:05,607 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:05,607 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:05,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:05,608 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:33:05,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:05,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:06,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2031 backedges. 702 proven. 1329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:06,679 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:06,679 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:06,688 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:33:06,758 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:33:06,759 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:06,762 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:08,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2031 backedges. 0 proven. 2031 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:08,159 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:08,159 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56] total 85 [2018-10-26 22:33:08,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-26 22:33:08,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-26 22:33:08,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1248, Invalid=5892, Unknown=0, NotChecked=0, Total=7140 [2018-10-26 22:33:08,160 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand 85 states. [2018-10-26 22:33:11,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:33:11,204 INFO L93 Difference]: Finished difference Result 178 states and 179 transitions. [2018-10-26 22:33:11,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-26 22:33:11,204 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 164 [2018-10-26 22:33:11,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:33:11,205 INFO L225 Difference]: With dead ends: 178 [2018-10-26 22:33:11,205 INFO L226 Difference]: Without dead ends: 176 [2018-10-26 22:33:11,206 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4721 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3299, Invalid=15883, Unknown=0, NotChecked=0, Total=19182 [2018-10-26 22:33:11,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-10-26 22:33:11,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 169. [2018-10-26 22:33:11,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-10-26 22:33:11,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2018-10-26 22:33:11,242 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 164 [2018-10-26 22:33:11,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:33:11,242 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2018-10-26 22:33:11,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-26 22:33:11,243 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2018-10-26 22:33:11,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-10-26 22:33:11,243 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:33:11,243 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:33:11,243 INFO L424 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:33:11,244 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:33:11,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1013723043, now seen corresponding path program 51 times [2018-10-26 22:33:11,244 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:33:11,244 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:33:11,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:11,244 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:33:11,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:33:11,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:33:14,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2134 backedges. 1275 proven. 859 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:14,023 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:33:14,023 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:33:14,031 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:33:14,152 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-26 22:33:14,152 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:33:14,156 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:33:17,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2134 backedges. 0 proven. 2134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:33:17,486 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:33:17,486 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 117 [2018-10-26 22:33:17,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 117 states [2018-10-26 22:33:17,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2018-10-26 22:33:17,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2025, Invalid=11547, Unknown=0, NotChecked=0, Total=13572 [2018-10-26 22:33:17,487 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand 117 states. Received shutdown request... [2018-10-26 22:33:18,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-26 22:33:18,692 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-26 22:33:18,697 WARN L205 ceAbstractionStarter]: Timeout [2018-10-26 22:33:18,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 10:33:18 BoogieIcfgContainer [2018-10-26 22:33:18,698 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-26 22:33:18,699 INFO L168 Benchmark]: Toolchain (without parser) took 242590.00 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 710.4 MB). Free memory was 1.4 GB in the beginning and 1.7 GB in the end (delta: -258.5 MB). Peak memory consumption was 451.9 MB. Max. memory is 7.1 GB. [2018-10-26 22:33:18,700 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-26 22:33:18,700 INFO L168 Benchmark]: CACSL2BoogieTranslator took 249.41 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-10-26 22:33:18,700 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.13 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-26 22:33:18,701 INFO L168 Benchmark]: Boogie Preprocessor took 21.35 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-26 22:33:18,701 INFO L168 Benchmark]: RCFGBuilder took 374.09 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 757.6 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -810.8 MB). Peak memory consumption was 26.7 MB. Max. memory is 7.1 GB. [2018-10-26 22:33:18,702 INFO L168 Benchmark]: TraceAbstraction took 241904.34 ms. Allocated memory was 2.3 GB in the beginning and 2.3 GB in the end (delta: -47.2 MB). Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 541.7 MB). Peak memory consumption was 494.5 MB. Max. memory is 7.1 GB. [2018-10-26 22:33:18,705 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 249.41 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 36.13 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 21.35 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 374.09 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 757.6 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -810.8 MB). Peak memory consumption was 26.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 241904.34 ms. Allocated memory was 2.3 GB in the beginning and 2.3 GB in the end (delta: -47.2 MB). Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 541.7 MB). Peak memory consumption was 494.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 5]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 5). Cancelled while BasicCegarLoop was constructing difference of abstraction (169states) and FLOYD_HOARE automaton (currently 43 states, 117 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 130 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 1 error locations. TIMEOUT Result, 241.7s OverallTime, 55 OverallIterations, 28 TraceHistogramMax, 112.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1456 SDtfs, 12144 SDslu, 43625 SDs, 0 SdLazy, 78035 SolverSat, 10274 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 53.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7949 GetRequests, 3617 SyntacticMatches, 2 SemanticMatches, 4329 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117642 ImplicationChecksByTransitivity, 163.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=169occurred in iteration=54, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 54 MinimizatonAttempts, 182 StatesRemovedByMinimization, 26 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 2.9s SatisfiabilityAnalysisTime, 121.1s InterpolantComputationTime, 9507 NumberOfCodeBlocks, 9507 NumberOfCodeBlocksAsserted, 501 NumberOfCheckSat, 9399 ConstructedInterpolants, 0 QuantifiedInterpolants, 12244853 SizeOfPredicates, 307 NumberOfNonLiveVariables, 13185 ConjunctsInSsa, 3083 ConjunctsInUnsatCore, 108 InterpolantComputations, 2 PerfectInterpolantSequences, 17927/77484 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown