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-new/count_by_nondet_true-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 11:59:51,886 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 11:59:51,888 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 11:59:51,900 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 11:59:51,900 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 11:59:51,901 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 11:59:51,902 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 11:59:51,904 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 11:59:51,905 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 11:59:51,906 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 11:59:51,907 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 11:59:51,907 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 11:59:51,908 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 11:59:51,909 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 11:59:51,910 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 11:59:51,911 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 11:59:51,912 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 11:59:51,914 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 11:59:51,916 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 11:59:51,917 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 11:59:51,918 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 11:59:51,919 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 11:59:51,921 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 11:59:51,930 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-24 11:59:51,948 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 11:59:51,948 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 11:59:51,949 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 11:59:51,949 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 11:59:51,949 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 11:59:51,950 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 11:59:51,950 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 11:59:51,950 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 11:59:51,950 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 11:59:51,950 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 11:59:51,951 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 11:59:51,951 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 11:59:51,951 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 11:59:51,951 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 11:59:51,951 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 11:59:51,952 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 11:59:51,952 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 11:59:51,952 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 11:59:51,952 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 11:59:51,952 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 11:59:51,953 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 11:59:51,953 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 11:59:51,953 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 11:59:51,953 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 11:59:51,953 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 11:59:51,954 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 11:59:51,954 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 11:59:51,954 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 11:59:51,996 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 11:59:52,013 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 11:59:52,018 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 11:59:52,020 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 11:59:52,020 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 11:59:52,021 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-new/count_by_nondet_true-unreach-call_true-termination.i [2018-10-24 11:59:52,090 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/fd6bb8abc/7b5d1bdb5c3f41b38dc40c567f9d88e0/FLAGd7ba2ce1b [2018-10-24 11:59:52,542 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 11:59:52,542 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_nondet_true-unreach-call_true-termination.i [2018-10-24 11:59:52,548 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/fd6bb8abc/7b5d1bdb5c3f41b38dc40c567f9d88e0/FLAGd7ba2ce1b [2018-10-24 11:59:52,565 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/fd6bb8abc/7b5d1bdb5c3f41b38dc40c567f9d88e0 [2018-10-24 11:59:52,575 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 11:59:52,576 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 11:59:52,577 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 11:59:52,577 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 11:59:52,581 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 11:59:52,582 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:59:52" (1/1) ... [2018-10-24 11:59:52,585 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fa5cb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:59:52, skipping insertion in model container [2018-10-24 11:59:52,585 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:59:52" (1/1) ... [2018-10-24 11:59:52,595 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 11:59:52,619 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 11:59:52,830 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 11:59:52,834 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 11:59:52,851 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 11:59:52,868 INFO L193 MainTranslator]: Completed translation [2018-10-24 11:59:52,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:59:52 WrapperNode [2018-10-24 11:59:52,868 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 11:59:52,870 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 11:59:52,870 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 11:59:52,870 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 11:59:52,881 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:59:52" (1/1) ... [2018-10-24 11:59:52,887 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:59:52" (1/1) ... [2018-10-24 11:59:52,906 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 11:59:52,907 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 11:59:52,907 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 11:59:52,907 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 11:59:52,918 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:59:52" (1/1) ... [2018-10-24 11:59:52,918 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:59:52" (1/1) ... [2018-10-24 11:59:52,919 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:59:52" (1/1) ... [2018-10-24 11:59:52,919 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:59:52" (1/1) ... [2018-10-24 11:59:52,921 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:59:52" (1/1) ... [2018-10-24 11:59:52,927 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:59:52" (1/1) ... [2018-10-24 11:59:52,928 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:59:52" (1/1) ... [2018-10-24 11:59:52,930 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 11:59:52,930 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 11:59:52,930 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 11:59:52,931 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 11:59:52,931 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:59:52" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 11:59:53,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 11:59:53,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 11:59:53,391 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 11:59:53,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:59:53 BoogieIcfgContainer [2018-10-24 11:59:53,392 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 11:59:53,392 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 11:59:53,392 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 11:59:53,395 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 11:59:53,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 11:59:52" (1/3) ... [2018-10-24 11:59:53,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d561213 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:59:53, skipping insertion in model container [2018-10-24 11:59:53,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:59:52" (2/3) ... [2018-10-24 11:59:53,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d561213 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:59:53, skipping insertion in model container [2018-10-24 11:59:53,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:59:53" (3/3) ... [2018-10-24 11:59:53,399 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_nondet_true-unreach-call_true-termination.i [2018-10-24 11:59:53,408 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 11:59:53,415 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 11:59:53,430 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 11:59:53,463 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 11:59:53,464 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 11:59:53,464 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 11:59:53,464 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 11:59:53,464 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 11:59:53,464 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 11:59:53,465 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 11:59:53,465 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 11:59:53,465 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 11:59:53,480 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2018-10-24 11:59:53,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-24 11:59:53,487 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:53,487 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-24 11:59:53,490 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:53,496 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:53,496 INFO L82 PathProgramCache]: Analyzing trace with hash 889937703, now seen corresponding path program 1 times [2018-10-24 11:59:53,498 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:53,499 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:53,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:53,550 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:59:53,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:53,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:53,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:53,606 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 11:59:53,606 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 11:59:53,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-24 11:59:53,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-24 11:59:53,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-24 11:59:53,626 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2018-10-24 11:59:53,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:53,651 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2018-10-24 11:59:53,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-24 11:59:53,653 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2018-10-24 11:59:53,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:53,666 INFO L225 Difference]: With dead ends: 21 [2018-10-24 11:59:53,667 INFO L226 Difference]: Without dead ends: 9 [2018-10-24 11:59:53,670 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 [2018-10-24 11:59:53,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-24 11:59:53,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-24 11:59:53,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-24 11:59:53,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-24 11:59:53,705 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-10-24 11:59:53,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:53,706 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-24 11:59:53,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-24 11:59:53,706 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-24 11:59:53,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-24 11:59:53,707 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:53,707 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:53,707 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:53,707 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:53,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1805928624, now seen corresponding path program 1 times [2018-10-24 11:59:53,708 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:53,708 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:53,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:53,709 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:59:53,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:53,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:53,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:53,772 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 11:59:53,772 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 11:59:53,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 11:59:53,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 11:59:53,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 11:59:53,782 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 3 states. [2018-10-24 11:59:53,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:53,851 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-24 11:59:53,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 11:59:53,852 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-10-24 11:59:53,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:53,853 INFO L225 Difference]: With dead ends: 16 [2018-10-24 11:59:53,853 INFO L226 Difference]: Without dead ends: 12 [2018-10-24 11:59:53,854 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 11:59:53,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-24 11:59:53,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2018-10-24 11:59:53,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-24 11:59:53,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-24 11:59:53,858 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 7 [2018-10-24 11:59:53,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:53,858 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-24 11:59:53,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 11:59:53,858 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-24 11:59:53,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-24 11:59:53,859 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:53,859 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:53,860 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:53,860 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:53,860 INFO L82 PathProgramCache]: Analyzing trace with hash -992267733, now seen corresponding path program 1 times [2018-10-24 11:59:53,860 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:53,860 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:53,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:53,862 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:59:53,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:53,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:53,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:53,955 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:53,956 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:53,966 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:59:53,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:54,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:54,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:54,057 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:54,057 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-24 11:59:54,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 11:59:54,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 11:59:54,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 11:59:54,058 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 4 states. [2018-10-24 11:59:54,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:54,108 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-10-24 11:59:54,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 11:59:54,109 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-10-24 11:59:54,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:54,110 INFO L225 Difference]: With dead ends: 18 [2018-10-24 11:59:54,110 INFO L226 Difference]: Without dead ends: 14 [2018-10-24 11:59:54,111 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 11:59:54,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-24 11:59:54,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-24 11:59:54,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-24 11:59:54,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-24 11:59:54,114 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 10 [2018-10-24 11:59:54,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:54,116 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-24 11:59:54,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 11:59:54,116 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-24 11:59:54,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-24 11:59:54,117 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:54,117 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:54,118 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:54,119 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:54,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1039691056, now seen corresponding path program 2 times [2018-10-24 11:59:54,119 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:54,119 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:54,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:54,120 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:59:54,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:54,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:54,235 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:54,236 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:54,236 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:54,245 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:59:54,263 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:59:54,264 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:54,266 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:54,299 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:54,320 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:54,320 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-24 11:59:54,321 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 11:59:54,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 11:59:54,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 11:59:54,322 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 6 states. [2018-10-24 11:59:54,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:54,428 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-24 11:59:54,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-24 11:59:54,429 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2018-10-24 11:59:54,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:54,429 INFO L225 Difference]: With dead ends: 22 [2018-10-24 11:59:54,429 INFO L226 Difference]: Without dead ends: 18 [2018-10-24 11:59:54,430 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-10-24 11:59:54,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-24 11:59:54,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2018-10-24 11:59:54,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-24 11:59:54,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-24 11:59:54,435 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 13 [2018-10-24 11:59:54,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:54,436 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-24 11:59:54,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 11:59:54,436 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-24 11:59:54,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-24 11:59:54,436 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:54,436 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:54,437 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:54,437 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:54,437 INFO L82 PathProgramCache]: Analyzing trace with hash -783666165, now seen corresponding path program 3 times [2018-10-24 11:59:54,437 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:54,437 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:54,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:54,438 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:54,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:54,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:54,804 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:54,804 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:54,804 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:54,820 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:59:54,843 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-24 11:59:54,843 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:54,846 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:54,877 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:54,903 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:54,903 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-24 11:59:54,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 11:59:54,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 11:59:54,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-10-24 11:59:54,904 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 7 states. [2018-10-24 11:59:54,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:54,950 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-24 11:59:54,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 11:59:54,951 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2018-10-24 11:59:54,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:54,952 INFO L225 Difference]: With dead ends: 25 [2018-10-24 11:59:54,952 INFO L226 Difference]: Without dead ends: 21 [2018-10-24 11:59:54,952 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-10-24 11:59:54,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-24 11:59:54,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2018-10-24 11:59:54,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-24 11:59:54,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-24 11:59:54,956 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 16 [2018-10-24 11:59:54,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:54,956 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-24 11:59:54,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 11:59:54,957 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-24 11:59:54,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-24 11:59:54,957 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:54,958 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:54,958 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:54,958 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:54,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1408056080, now seen corresponding path program 4 times [2018-10-24 11:59:54,958 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:54,958 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:54,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:54,959 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:54,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:54,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:55,108 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:55,108 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:55,108 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:55,117 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:59:55,158 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:59:55,158 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:55,160 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:55,274 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:55,296 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:55,296 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-24 11:59:55,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-24 11:59:55,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-24 11:59:55,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-10-24 11:59:55,297 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 8 states. [2018-10-24 11:59:55,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:55,365 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-10-24 11:59:55,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-24 11:59:55,365 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2018-10-24 11:59:55,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:55,367 INFO L225 Difference]: With dead ends: 28 [2018-10-24 11:59:55,367 INFO L226 Difference]: Without dead ends: 24 [2018-10-24 11:59:55,368 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-24 11:59:55,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-24 11:59:55,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2018-10-24 11:59:55,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-24 11:59:55,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-24 11:59:55,372 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 19 [2018-10-24 11:59:55,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:55,373 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-24 11:59:55,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-24 11:59:55,373 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-24 11:59:55,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-24 11:59:55,374 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:55,374 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:55,374 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:55,374 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:55,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1104654869, now seen corresponding path program 5 times [2018-10-24 11:59:55,375 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:55,375 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:55,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:55,376 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:55,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:55,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:55,502 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:55,502 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:55,503 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:55,510 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:59:55,527 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-24 11:59:55,527 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:55,530 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:55,576 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:55,603 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:55,603 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-24 11:59:55,604 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 11:59:55,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 11:59:55,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2018-10-24 11:59:55,605 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 9 states. [2018-10-24 11:59:55,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:55,760 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-24 11:59:55,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-24 11:59:55,760 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2018-10-24 11:59:55,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:55,761 INFO L225 Difference]: With dead ends: 31 [2018-10-24 11:59:55,761 INFO L226 Difference]: Without dead ends: 27 [2018-10-24 11:59:55,762 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2018-10-24 11:59:55,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-24 11:59:55,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2018-10-24 11:59:55,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-24 11:59:55,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-24 11:59:55,766 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 22 [2018-10-24 11:59:55,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:55,767 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-24 11:59:55,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-24 11:59:55,767 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-24 11:59:55,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-24 11:59:55,768 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:55,768 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:55,769 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:55,769 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:55,769 INFO L82 PathProgramCache]: Analyzing trace with hash 909631248, now seen corresponding path program 6 times [2018-10-24 11:59:55,769 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:55,769 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:55,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:55,771 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:55,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:55,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:56,097 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:56,098 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:56,098 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:56,108 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:59:56,133 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-24 11:59:56,133 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:56,137 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:56,169 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:56,189 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:56,190 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-24 11:59:56,190 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-24 11:59:56,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-24 11:59:56,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2018-10-24 11:59:56,191 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 10 states. [2018-10-24 11:59:56,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:56,305 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-24 11:59:56,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-24 11:59:56,306 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2018-10-24 11:59:56,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:56,307 INFO L225 Difference]: With dead ends: 34 [2018-10-24 11:59:56,307 INFO L226 Difference]: Without dead ends: 30 [2018-10-24 11:59:56,308 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2018-10-24 11:59:56,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-24 11:59:56,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2018-10-24 11:59:56,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-24 11:59:56,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-24 11:59:56,312 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 25 [2018-10-24 11:59:56,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:56,313 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-24 11:59:56,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-24 11:59:56,313 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-24 11:59:56,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-24 11:59:56,314 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:56,314 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:56,314 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:56,315 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:56,315 INFO L82 PathProgramCache]: Analyzing trace with hash -775716917, now seen corresponding path program 7 times [2018-10-24 11:59:56,315 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:56,315 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:56,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:56,316 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:56,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:56,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:56,611 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:56,611 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:56,612 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:56,619 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:59:56,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:56,638 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:56,675 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:56,696 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:56,696 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-24 11:59:56,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-24 11:59:56,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-24 11:59:56,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2018-10-24 11:59:56,698 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 11 states. [2018-10-24 11:59:56,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:56,767 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-24 11:59:56,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-24 11:59:56,768 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2018-10-24 11:59:56,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:56,769 INFO L225 Difference]: With dead ends: 37 [2018-10-24 11:59:56,769 INFO L226 Difference]: Without dead ends: 33 [2018-10-24 11:59:56,769 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2018-10-24 11:59:56,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-24 11:59:56,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2018-10-24 11:59:56,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-24 11:59:56,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-24 11:59:56,774 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 28 [2018-10-24 11:59:56,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:56,774 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-24 11:59:56,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-24 11:59:56,775 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-24 11:59:56,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-24 11:59:56,775 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:56,776 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:56,776 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:56,776 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:56,777 INFO L82 PathProgramCache]: Analyzing trace with hash -815210192, now seen corresponding path program 8 times [2018-10-24 11:59:56,777 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:56,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:56,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:56,778 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:59:56,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:56,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:57,000 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:57,001 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:57,001 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:57,020 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:59:57,061 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:59:57,061 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:57,063 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:57,113 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:57,134 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:57,135 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-24 11:59:57,135 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-24 11:59:57,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-24 11:59:57,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2018-10-24 11:59:57,136 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 12 states. [2018-10-24 11:59:57,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:57,479 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-10-24 11:59:57,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-24 11:59:57,479 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2018-10-24 11:59:57,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:57,480 INFO L225 Difference]: With dead ends: 40 [2018-10-24 11:59:57,480 INFO L226 Difference]: Without dead ends: 36 [2018-10-24 11:59:57,481 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2018-10-24 11:59:57,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-24 11:59:57,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2018-10-24 11:59:57,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-24 11:59:57,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-24 11:59:57,485 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 31 [2018-10-24 11:59:57,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:57,486 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-24 11:59:57,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-24 11:59:57,486 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-24 11:59:57,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-24 11:59:57,487 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:57,487 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:57,487 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:57,488 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:57,488 INFO L82 PathProgramCache]: Analyzing trace with hash -538326613, now seen corresponding path program 9 times [2018-10-24 11:59:57,488 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:57,488 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:57,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:57,489 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:57,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:57,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:57,779 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:57,780 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:57,780 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:57,787 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:59:57,836 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-24 11:59:57,836 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:57,839 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:57,856 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:57,878 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:57,878 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-24 11:59:57,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-24 11:59:57,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-24 11:59:57,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2018-10-24 11:59:57,879 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 13 states. [2018-10-24 11:59:57,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:57,984 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-24 11:59:57,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-24 11:59:57,985 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2018-10-24 11:59:57,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:57,986 INFO L225 Difference]: With dead ends: 43 [2018-10-24 11:59:57,986 INFO L226 Difference]: Without dead ends: 39 [2018-10-24 11:59:57,988 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2018-10-24 11:59:57,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-24 11:59:57,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2018-10-24 11:59:57,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-24 11:59:57,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-24 11:59:57,994 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 34 [2018-10-24 11:59:57,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:57,994 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-24 11:59:57,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-24 11:59:57,995 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-24 11:59:57,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-24 11:59:57,995 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:57,996 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:57,996 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:57,996 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:57,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1763167056, now seen corresponding path program 10 times [2018-10-24 11:59:57,996 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:57,997 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:57,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:57,997 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:57,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:58,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:58,381 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:58,381 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:58,382 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 [2018-10-24 11:59:58,389 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:59:58,412 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:59:58,412 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:58,416 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:58,446 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:58,466 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:58,466 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-24 11:59:58,467 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-24 11:59:58,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-24 11:59:58,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2018-10-24 11:59:58,468 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 14 states. [2018-10-24 11:59:58,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:58,519 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-10-24 11:59:58,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-24 11:59:58,520 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2018-10-24 11:59:58,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:58,521 INFO L225 Difference]: With dead ends: 46 [2018-10-24 11:59:58,521 INFO L226 Difference]: Without dead ends: 42 [2018-10-24 11:59:58,522 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2018-10-24 11:59:58,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-24 11:59:58,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2018-10-24 11:59:58,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-24 11:59:58,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-24 11:59:58,527 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 37 [2018-10-24 11:59:58,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:58,527 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-24 11:59:58,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-24 11:59:58,527 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-24 11:59:58,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-24 11:59:58,529 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:58,529 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:58,529 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:58,530 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:58,530 INFO L82 PathProgramCache]: Analyzing trace with hash 703146891, now seen corresponding path program 11 times [2018-10-24 11:59:58,530 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:58,530 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:58,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:58,531 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:58,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:58,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:58,767 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:58,767 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:58,768 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 [2018-10-24 11:59:58,776 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:59:58,805 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-24 11:59:58,806 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:58,809 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:58,849 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:58,870 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:58,871 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-24 11:59:58,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-24 11:59:58,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-24 11:59:58,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2018-10-24 11:59:58,872 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 15 states. [2018-10-24 11:59:58,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:58,954 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-24 11:59:58,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-24 11:59:58,954 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2018-10-24 11:59:58,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:58,956 INFO L225 Difference]: With dead ends: 49 [2018-10-24 11:59:58,956 INFO L226 Difference]: Without dead ends: 45 [2018-10-24 11:59:58,957 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2018-10-24 11:59:58,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-24 11:59:58,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2018-10-24 11:59:58,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-24 11:59:58,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-24 11:59:58,960 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 40 [2018-10-24 11:59:58,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:58,961 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-24 11:59:58,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-24 11:59:58,961 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-24 11:59:58,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-24 11:59:58,962 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:58,962 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:58,962 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:58,962 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:58,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1758028432, now seen corresponding path program 12 times [2018-10-24 11:59:58,963 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:58,963 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:58,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:58,964 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:58,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:58,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:59,188 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:59,188 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:59,188 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 [2018-10-24 11:59:59,198 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:59:59,229 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-24 11:59:59,229 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:59,233 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:59,270 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:59,290 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:59,291 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-24 11:59:59,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-24 11:59:59,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-24 11:59:59,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2018-10-24 11:59:59,292 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 16 states. [2018-10-24 11:59:59,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:59,374 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-10-24 11:59:59,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-24 11:59:59,375 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2018-10-24 11:59:59,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:59,376 INFO L225 Difference]: With dead ends: 52 [2018-10-24 11:59:59,376 INFO L226 Difference]: Without dead ends: 48 [2018-10-24 11:59:59,377 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=161, Unknown=0, NotChecked=0, Total=272 [2018-10-24 11:59:59,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-24 11:59:59,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2018-10-24 11:59:59,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-24 11:59:59,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-24 11:59:59,382 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 43 [2018-10-24 11:59:59,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:59,382 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-24 11:59:59,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-24 11:59:59,382 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-24 11:59:59,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-24 11:59:59,383 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:59,383 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:59,384 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:59,384 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:59,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1049601387, now seen corresponding path program 13 times [2018-10-24 11:59:59,384 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:59,384 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:59,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:59,385 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:59,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:59,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:59,730 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:59,730 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:59,730 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 [2018-10-24 11:59:59,738 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:59:59,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:59,766 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:59,848 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:59,868 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:59,868 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-24 11:59:59,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-24 11:59:59,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-24 11:59:59,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2018-10-24 11:59:59,869 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 17 states. [2018-10-24 11:59:59,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:59,940 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-24 11:59:59,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-24 11:59:59,940 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 46 [2018-10-24 11:59:59,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:59,941 INFO L225 Difference]: With dead ends: 55 [2018-10-24 11:59:59,941 INFO L226 Difference]: Without dead ends: 51 [2018-10-24 11:59:59,942 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=180, Unknown=0, NotChecked=0, Total=306 [2018-10-24 11:59:59,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-24 11:59:59,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2018-10-24 11:59:59,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-24 11:59:59,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-10-24 11:59:59,947 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 46 [2018-10-24 11:59:59,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:59,947 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-10-24 11:59:59,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-24 11:59:59,947 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-10-24 11:59:59,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-24 11:59:59,948 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:59,948 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:59,948 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:59,949 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:59,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1338550384, now seen corresponding path program 14 times [2018-10-24 11:59:59,949 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:59,949 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:59,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:59,950 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:59:59,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:59,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:00,350 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:00,350 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:00,350 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 [2018-10-24 12:00:00,359 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 12:00:00,403 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 12:00:00,403 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:00,406 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:00,525 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:00,548 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:00,548 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-24 12:00:00,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-24 12:00:00,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-24 12:00:00,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2018-10-24 12:00:00,549 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 18 states. [2018-10-24 12:00:00,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:00,616 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-10-24 12:00:00,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-24 12:00:00,616 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 49 [2018-10-24 12:00:00,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:00,617 INFO L225 Difference]: With dead ends: 58 [2018-10-24 12:00:00,617 INFO L226 Difference]: Without dead ends: 54 [2018-10-24 12:00:00,618 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=142, Invalid=200, Unknown=0, NotChecked=0, Total=342 [2018-10-24 12:00:00,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-24 12:00:00,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2018-10-24 12:00:00,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-24 12:00:00,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-24 12:00:00,623 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 49 [2018-10-24 12:00:00,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:00,623 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-24 12:00:00,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-24 12:00:00,624 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-24 12:00:00,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-24 12:00:00,625 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:00,625 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:00,625 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:00,625 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:00,626 INFO L82 PathProgramCache]: Analyzing trace with hash -634702005, now seen corresponding path program 15 times [2018-10-24 12:00:00,626 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:00,626 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:00,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:00,627 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:00,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:00,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:00,906 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:00,906 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:00,906 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 [2018-10-24 12:00:00,914 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 12:00:00,955 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-24 12:00:00,955 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:00,959 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:00,991 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:01,012 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:01,012 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-24 12:00:01,013 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-24 12:00:01,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-24 12:00:01,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2018-10-24 12:00:01,013 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 19 states. [2018-10-24 12:00:01,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:01,305 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-24 12:00:01,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-24 12:00:01,305 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 52 [2018-10-24 12:00:01,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:01,306 INFO L225 Difference]: With dead ends: 61 [2018-10-24 12:00:01,306 INFO L226 Difference]: Without dead ends: 57 [2018-10-24 12:00:01,307 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=221, Unknown=0, NotChecked=0, Total=380 [2018-10-24 12:00:01,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-24 12:00:01,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2018-10-24 12:00:01,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-24 12:00:01,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-10-24 12:00:01,312 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 52 [2018-10-24 12:00:01,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:01,312 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-10-24 12:00:01,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-24 12:00:01,312 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-10-24 12:00:01,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-24 12:00:01,313 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:01,313 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:01,314 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:01,314 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:01,314 INFO L82 PathProgramCache]: Analyzing trace with hash -317982288, now seen corresponding path program 16 times [2018-10-24 12:00:01,314 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:01,314 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:01,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:01,315 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:01,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:01,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:01,800 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:01,801 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:01,801 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 [2018-10-24 12:00:01,810 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 12:00:01,840 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 12:00:01,841 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:01,843 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:01,931 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:01,952 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:01,952 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-24 12:00:01,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-24 12:00:01,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-24 12:00:01,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2018-10-24 12:00:01,953 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 20 states. [2018-10-24 12:00:02,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:02,245 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-10-24 12:00:02,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-24 12:00:02,246 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 55 [2018-10-24 12:00:02,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:02,246 INFO L225 Difference]: With dead ends: 64 [2018-10-24 12:00:02,247 INFO L226 Difference]: Without dead ends: 60 [2018-10-24 12:00:02,247 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=243, Unknown=0, NotChecked=0, Total=420 [2018-10-24 12:00:02,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-24 12:00:02,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2018-10-24 12:00:02,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-24 12:00:02,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-24 12:00:02,252 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 55 [2018-10-24 12:00:02,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:02,252 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-24 12:00:02,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-24 12:00:02,252 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-24 12:00:02,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-24 12:00:02,253 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:02,253 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:02,253 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:02,253 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:02,254 INFO L82 PathProgramCache]: Analyzing trace with hash -964042453, now seen corresponding path program 17 times [2018-10-24 12:00:02,254 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:02,254 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:02,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:02,255 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:02,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:02,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:02,706 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:02,706 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:02,706 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 [2018-10-24 12:00:02,714 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 12:00:02,766 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-24 12:00:02,766 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:02,768 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:02,811 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:02,832 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:02,832 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-24 12:00:02,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-24 12:00:02,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-24 12:00:02,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2018-10-24 12:00:02,833 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 21 states. [2018-10-24 12:00:02,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:02,885 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-24 12:00:02,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-24 12:00:02,886 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 58 [2018-10-24 12:00:02,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:02,887 INFO L225 Difference]: With dead ends: 67 [2018-10-24 12:00:02,887 INFO L226 Difference]: Without dead ends: 63 [2018-10-24 12:00:02,888 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=266, Unknown=0, NotChecked=0, Total=462 [2018-10-24 12:00:02,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-24 12:00:02,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2018-10-24 12:00:02,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-24 12:00:02,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-10-24 12:00:02,894 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 58 [2018-10-24 12:00:02,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:02,894 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-10-24 12:00:02,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-24 12:00:02,894 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-10-24 12:00:02,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-24 12:00:02,895 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:02,895 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:02,896 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:02,896 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:02,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1993964592, now seen corresponding path program 18 times [2018-10-24 12:00:02,896 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:02,896 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:02,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:02,897 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:02,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:02,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:03,239 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:03,240 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:03,240 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 [2018-10-24 12:00:03,248 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 12:00:03,298 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-24 12:00:03,298 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:03,300 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:03,395 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:03,416 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:03,416 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-24 12:00:03,417 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-24 12:00:03,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-24 12:00:03,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2018-10-24 12:00:03,417 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 22 states. [2018-10-24 12:00:03,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:03,509 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-10-24 12:00:03,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-24 12:00:03,509 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 61 [2018-10-24 12:00:03,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:03,510 INFO L225 Difference]: With dead ends: 70 [2018-10-24 12:00:03,510 INFO L226 Difference]: Without dead ends: 66 [2018-10-24 12:00:03,511 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=290, Unknown=0, NotChecked=0, Total=506 [2018-10-24 12:00:03,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-24 12:00:03,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2018-10-24 12:00:03,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-24 12:00:03,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-10-24 12:00:03,516 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 61 [2018-10-24 12:00:03,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:03,516 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-10-24 12:00:03,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-24 12:00:03,516 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-10-24 12:00:03,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-24 12:00:03,517 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:03,517 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:03,518 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:03,518 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:03,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1158044917, now seen corresponding path program 19 times [2018-10-24 12:00:03,518 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:03,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:03,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:03,519 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:03,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:03,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:03,963 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:03,964 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:03,964 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 [2018-10-24 12:00:03,972 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:00:04,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:04,020 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:04,097 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:04,118 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:04,118 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-24 12:00:04,119 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-24 12:00:04,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-24 12:00:04,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2018-10-24 12:00:04,119 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 23 states. [2018-10-24 12:00:04,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:04,189 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-24 12:00:04,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-24 12:00:04,190 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 64 [2018-10-24 12:00:04,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:04,191 INFO L225 Difference]: With dead ends: 73 [2018-10-24 12:00:04,191 INFO L226 Difference]: Without dead ends: 69 [2018-10-24 12:00:04,192 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=237, Invalid=315, Unknown=0, NotChecked=0, Total=552 [2018-10-24 12:00:04,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-24 12:00:04,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2018-10-24 12:00:04,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-24 12:00:04,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-10-24 12:00:04,197 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 64 [2018-10-24 12:00:04,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:04,197 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-10-24 12:00:04,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-24 12:00:04,198 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-10-24 12:00:04,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-24 12:00:04,198 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:04,199 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:04,199 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:04,199 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:04,199 INFO L82 PathProgramCache]: Analyzing trace with hash -495389200, now seen corresponding path program 20 times [2018-10-24 12:00:04,199 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:04,200 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:04,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:04,201 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:00:04,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:04,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:04,790 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:04,790 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:04,790 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 [2018-10-24 12:00:04,799 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 12:00:04,834 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 12:00:04,834 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:04,836 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:04,875 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:04,896 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:04,897 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-24 12:00:04,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-24 12:00:04,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-24 12:00:04,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2018-10-24 12:00:04,898 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 24 states. [2018-10-24 12:00:05,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:05,013 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-10-24 12:00:05,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-24 12:00:05,016 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 67 [2018-10-24 12:00:05,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:05,017 INFO L225 Difference]: With dead ends: 76 [2018-10-24 12:00:05,017 INFO L226 Difference]: Without dead ends: 72 [2018-10-24 12:00:05,017 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=259, Invalid=341, Unknown=0, NotChecked=0, Total=600 [2018-10-24 12:00:05,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-24 12:00:05,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2018-10-24 12:00:05,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-24 12:00:05,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-10-24 12:00:05,020 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 67 [2018-10-24 12:00:05,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:05,020 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-10-24 12:00:05,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-24 12:00:05,020 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-10-24 12:00:05,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-24 12:00:05,021 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:05,021 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:05,022 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:05,022 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:05,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1011383531, now seen corresponding path program 21 times [2018-10-24 12:00:05,022 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:05,022 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:05,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:05,023 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:05,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:05,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:06,224 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:06,224 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:06,225 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 [2018-10-24 12:00:06,233 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 12:00:06,279 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-24 12:00:06,279 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:06,281 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:06,359 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:06,380 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:06,381 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-24 12:00:06,381 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-24 12:00:06,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-24 12:00:06,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2018-10-24 12:00:06,382 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 25 states. [2018-10-24 12:00:06,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:06,523 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-10-24 12:00:06,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-24 12:00:06,524 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 70 [2018-10-24 12:00:06,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:06,525 INFO L225 Difference]: With dead ends: 79 [2018-10-24 12:00:06,525 INFO L226 Difference]: Without dead ends: 75 [2018-10-24 12:00:06,526 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=282, Invalid=368, Unknown=0, NotChecked=0, Total=650 [2018-10-24 12:00:06,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-24 12:00:06,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2018-10-24 12:00:06,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-24 12:00:06,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-10-24 12:00:06,530 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 70 [2018-10-24 12:00:06,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:06,530 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-10-24 12:00:06,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-24 12:00:06,530 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-10-24 12:00:06,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-24 12:00:06,531 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:06,531 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:06,531 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:06,531 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:06,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1720365040, now seen corresponding path program 22 times [2018-10-24 12:00:06,532 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:06,532 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:06,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:06,533 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:06,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:06,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:06,999 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:06,999 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:07,000 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 [2018-10-24 12:00:07,007 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 12:00:07,057 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 12:00:07,057 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:07,060 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:07,156 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:07,187 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:07,187 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-24 12:00:07,188 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-24 12:00:07,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-24 12:00:07,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2018-10-24 12:00:07,189 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 26 states. [2018-10-24 12:00:07,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:07,605 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-10-24 12:00:07,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-24 12:00:07,605 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 73 [2018-10-24 12:00:07,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:07,606 INFO L225 Difference]: With dead ends: 82 [2018-10-24 12:00:07,607 INFO L226 Difference]: Without dead ends: 78 [2018-10-24 12:00:07,608 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=306, Invalid=396, Unknown=0, NotChecked=0, Total=702 [2018-10-24 12:00:07,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-24 12:00:07,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2018-10-24 12:00:07,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-24 12:00:07,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-10-24 12:00:07,612 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 73 [2018-10-24 12:00:07,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:07,612 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-10-24 12:00:07,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-24 12:00:07,613 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-10-24 12:00:07,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-24 12:00:07,613 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:07,613 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:07,613 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:07,613 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:07,614 INFO L82 PathProgramCache]: Analyzing trace with hash 2093248203, now seen corresponding path program 23 times [2018-10-24 12:00:07,614 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:07,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:07,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:07,615 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:07,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:07,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:08,101 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:08,101 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:08,102 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 [2018-10-24 12:00:08,108 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 12:00:08,166 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-24 12:00:08,166 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:08,169 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:08,201 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:08,222 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:08,222 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-24 12:00:08,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-24 12:00:08,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-24 12:00:08,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2018-10-24 12:00:08,223 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 27 states. [2018-10-24 12:00:08,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:08,334 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-10-24 12:00:08,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-24 12:00:08,334 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 76 [2018-10-24 12:00:08,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:08,335 INFO L225 Difference]: With dead ends: 85 [2018-10-24 12:00:08,335 INFO L226 Difference]: Without dead ends: 81 [2018-10-24 12:00:08,336 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=331, Invalid=425, Unknown=0, NotChecked=0, Total=756 [2018-10-24 12:00:08,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-24 12:00:08,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2018-10-24 12:00:08,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-24 12:00:08,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-10-24 12:00:08,339 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 76 [2018-10-24 12:00:08,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:08,339 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-10-24 12:00:08,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-24 12:00:08,339 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-10-24 12:00:08,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-24 12:00:08,340 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:08,340 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:08,340 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:08,340 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:08,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1324510672, now seen corresponding path program 24 times [2018-10-24 12:00:08,341 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:08,341 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:08,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:08,342 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:08,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:08,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:09,245 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:09,245 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:09,245 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 [2018-10-24 12:00:09,253 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 12:00:09,307 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-24 12:00:09,308 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:09,312 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:09,376 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:09,397 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:09,397 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-24 12:00:09,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-24 12:00:09,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-24 12:00:09,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2018-10-24 12:00:09,398 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 28 states. [2018-10-24 12:00:09,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:09,650 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-10-24 12:00:09,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-24 12:00:09,651 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 79 [2018-10-24 12:00:09,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:09,652 INFO L225 Difference]: With dead ends: 88 [2018-10-24 12:00:09,652 INFO L226 Difference]: Without dead ends: 84 [2018-10-24 12:00:09,653 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=357, Invalid=455, Unknown=0, NotChecked=0, Total=812 [2018-10-24 12:00:09,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-24 12:00:09,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2018-10-24 12:00:09,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-24 12:00:09,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-10-24 12:00:09,656 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 79 [2018-10-24 12:00:09,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:09,657 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-10-24 12:00:09,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-24 12:00:09,657 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-10-24 12:00:09,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-24 12:00:09,657 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:09,657 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:09,658 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:09,658 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:09,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1010530475, now seen corresponding path program 25 times [2018-10-24 12:00:09,658 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:09,658 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:09,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:09,659 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:09,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:09,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:10,759 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:10,759 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:10,759 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 [2018-10-24 12:00:10,767 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:00:10,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:10,821 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:10,873 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:10,893 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:10,893 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-24 12:00:10,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-24 12:00:10,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-24 12:00:10,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2018-10-24 12:00:10,895 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 29 states. [2018-10-24 12:00:10,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:10,962 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-10-24 12:00:10,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-24 12:00:10,962 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 82 [2018-10-24 12:00:10,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:10,963 INFO L225 Difference]: With dead ends: 91 [2018-10-24 12:00:10,963 INFO L226 Difference]: Without dead ends: 87 [2018-10-24 12:00:10,964 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=384, Invalid=486, Unknown=0, NotChecked=0, Total=870 [2018-10-24 12:00:10,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-24 12:00:10,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2018-10-24 12:00:10,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-24 12:00:10,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-10-24 12:00:10,968 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 82 [2018-10-24 12:00:10,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:10,968 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-10-24 12:00:10,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-24 12:00:10,968 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-10-24 12:00:10,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-24 12:00:10,969 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:10,969 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:10,969 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:10,969 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:10,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1363952560, now seen corresponding path program 26 times [2018-10-24 12:00:10,970 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:10,970 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:10,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:10,971 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:00:10,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:10,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:11,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:11,772 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:11,772 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 [2018-10-24 12:00:11,780 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 12:00:11,836 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 12:00:11,836 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:11,839 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:11,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:11,959 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:11,959 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-24 12:00:11,959 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-24 12:00:11,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-24 12:00:11,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2018-10-24 12:00:11,960 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 30 states. [2018-10-24 12:00:12,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:12,080 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-10-24 12:00:12,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-24 12:00:12,081 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 85 [2018-10-24 12:00:12,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:12,081 INFO L225 Difference]: With dead ends: 94 [2018-10-24 12:00:12,081 INFO L226 Difference]: Without dead ends: 90 [2018-10-24 12:00:12,082 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=412, Invalid=518, Unknown=0, NotChecked=0, Total=930 [2018-10-24 12:00:12,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-24 12:00:12,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2018-10-24 12:00:12,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-24 12:00:12,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-10-24 12:00:12,085 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 85 [2018-10-24 12:00:12,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:12,085 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-10-24 12:00:12,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-24 12:00:12,086 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-10-24 12:00:12,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-24 12:00:12,086 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:12,086 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:12,087 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:12,087 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:12,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1476683125, now seen corresponding path program 27 times [2018-10-24 12:00:12,087 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:12,087 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:12,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:12,088 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:12,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:12,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:13,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:13,200 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:13,200 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 [2018-10-24 12:00:13,209 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 12:00:13,264 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-24 12:00:13,265 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:13,267 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:13,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:13,350 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:13,351 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-24 12:00:13,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-24 12:00:13,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-24 12:00:13,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2018-10-24 12:00:13,352 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 31 states. [2018-10-24 12:00:13,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:13,419 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-10-24 12:00:13,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-24 12:00:13,419 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 88 [2018-10-24 12:00:13,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:13,420 INFO L225 Difference]: With dead ends: 97 [2018-10-24 12:00:13,421 INFO L226 Difference]: Without dead ends: 93 [2018-10-24 12:00:13,422 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=441, Invalid=551, Unknown=0, NotChecked=0, Total=992 [2018-10-24 12:00:13,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-24 12:00:13,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2018-10-24 12:00:13,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-24 12:00:13,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-10-24 12:00:13,425 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 88 [2018-10-24 12:00:13,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:13,426 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-10-24 12:00:13,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-24 12:00:13,426 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-10-24 12:00:13,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-10-24 12:00:13,426 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:13,427 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:13,427 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:13,427 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:13,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1168519568, now seen corresponding path program 28 times [2018-10-24 12:00:13,427 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:13,427 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:13,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:13,428 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:13,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:13,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:14,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:14,520 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:14,520 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 [2018-10-24 12:00:14,527 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 12:00:14,574 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 12:00:14,575 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:14,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:14,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:14,673 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:14,673 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-24 12:00:14,673 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-24 12:00:14,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-24 12:00:14,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2018-10-24 12:00:14,674 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 32 states. [2018-10-24 12:00:14,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:14,745 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-10-24 12:00:14,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-24 12:00:14,746 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 91 [2018-10-24 12:00:14,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:14,747 INFO L225 Difference]: With dead ends: 100 [2018-10-24 12:00:14,747 INFO L226 Difference]: Without dead ends: 96 [2018-10-24 12:00:14,748 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=471, Invalid=585, Unknown=0, NotChecked=0, Total=1056 [2018-10-24 12:00:14,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-24 12:00:14,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2018-10-24 12:00:14,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-24 12:00:14,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-10-24 12:00:14,751 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 91 [2018-10-24 12:00:14,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:14,752 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-10-24 12:00:14,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-24 12:00:14,752 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-10-24 12:00:14,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-24 12:00:14,752 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:14,753 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:14,753 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:14,753 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:14,753 INFO L82 PathProgramCache]: Analyzing trace with hash 986895467, now seen corresponding path program 29 times [2018-10-24 12:00:14,753 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:14,754 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:14,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:14,754 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:14,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:14,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:15,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1276 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:15,564 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:15,564 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 [2018-10-24 12:00:15,571 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 12:00:15,660 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-10-24 12:00:15,660 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:15,663 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:15,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1276 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:15,777 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:15,777 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-24 12:00:15,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-24 12:00:15,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-24 12:00:15,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2018-10-24 12:00:15,778 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 33 states. [2018-10-24 12:00:16,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:16,006 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-10-24 12:00:16,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-24 12:00:16,007 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 94 [2018-10-24 12:00:16,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:16,008 INFO L225 Difference]: With dead ends: 103 [2018-10-24 12:00:16,008 INFO L226 Difference]: Without dead ends: 99 [2018-10-24 12:00:16,009 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=502, Invalid=620, Unknown=0, NotChecked=0, Total=1122 [2018-10-24 12:00:16,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-24 12:00:16,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2018-10-24 12:00:16,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-24 12:00:16,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-10-24 12:00:16,012 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 94 [2018-10-24 12:00:16,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:16,013 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-10-24 12:00:16,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-24 12:00:16,013 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-10-24 12:00:16,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-24 12:00:16,014 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:16,014 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 30, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:16,014 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:16,014 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:16,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1099839344, now seen corresponding path program 30 times [2018-10-24 12:00:16,015 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:16,015 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:16,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:16,015 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:16,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:16,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:16,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:16,785 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:16,785 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) [2018-10-24 12:00:16,800 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:00:16,881 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-24 12:00:16,881 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:16,885 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:16,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:17,005 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:17,006 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-24 12:00:17,006 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-24 12:00:17,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-24 12:00:17,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2018-10-24 12:00:17,007 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 34 states. [2018-10-24 12:00:17,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:17,112 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-10-24 12:00:17,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-24 12:00:17,113 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 97 [2018-10-24 12:00:17,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:17,114 INFO L225 Difference]: With dead ends: 106 [2018-10-24 12:00:17,114 INFO L226 Difference]: Without dead ends: 102 [2018-10-24 12:00:17,115 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=534, Invalid=656, Unknown=0, NotChecked=0, Total=1190 [2018-10-24 12:00:17,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-24 12:00:17,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2018-10-24 12:00:17,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-24 12:00:17,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-10-24 12:00:17,119 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 97 [2018-10-24 12:00:17,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:17,119 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-10-24 12:00:17,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-24 12:00:17,119 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-10-24 12:00:17,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-24 12:00:17,120 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:17,120 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:17,120 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:17,121 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:17,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1659951541, now seen corresponding path program 31 times [2018-10-24 12:00:17,121 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:17,121 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:17,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:17,121 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:17,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:17,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:17,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:17,730 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:17,730 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 [2018-10-24 12:00:17,738 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:00:17,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:17,793 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:17,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:17,876 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:17,877 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-24 12:00:17,877 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-24 12:00:17,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-24 12:00:17,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2018-10-24 12:00:17,878 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 35 states. [2018-10-24 12:00:18,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:18,005 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-10-24 12:00:18,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-24 12:00:18,006 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 100 [2018-10-24 12:00:18,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:18,007 INFO L225 Difference]: With dead ends: 109 [2018-10-24 12:00:18,007 INFO L226 Difference]: Without dead ends: 105 [2018-10-24 12:00:18,008 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=567, Invalid=693, Unknown=0, NotChecked=0, Total=1260 [2018-10-24 12:00:18,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-24 12:00:18,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2018-10-24 12:00:18,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-24 12:00:18,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-10-24 12:00:18,012 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 100 [2018-10-24 12:00:18,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:18,013 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-10-24 12:00:18,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-24 12:00:18,013 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-10-24 12:00:18,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-24 12:00:18,013 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:18,013 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 32, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:18,014 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:18,014 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:18,014 INFO L82 PathProgramCache]: Analyzing trace with hash -2014467408, now seen corresponding path program 32 times [2018-10-24 12:00:18,014 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:18,014 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:18,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:18,015 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:00:18,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:18,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:19,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1552 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:19,179 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:19,179 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 [2018-10-24 12:00:19,186 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 12:00:19,242 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 12:00:19,242 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:19,245 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:19,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1552 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:19,341 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:19,341 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-24 12:00:19,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-24 12:00:19,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-24 12:00:19,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2018-10-24 12:00:19,343 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 36 states. [2018-10-24 12:00:19,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:19,424 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-10-24 12:00:19,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-24 12:00:19,424 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 103 [2018-10-24 12:00:19,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:19,426 INFO L225 Difference]: With dead ends: 112 [2018-10-24 12:00:19,426 INFO L226 Difference]: Without dead ends: 108 [2018-10-24 12:00:19,427 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=601, Invalid=731, Unknown=0, NotChecked=0, Total=1332 [2018-10-24 12:00:19,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-10-24 12:00:19,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2018-10-24 12:00:19,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-24 12:00:19,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-10-24 12:00:19,430 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 103 [2018-10-24 12:00:19,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:19,431 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-10-24 12:00:19,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-24 12:00:19,431 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-10-24 12:00:19,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-24 12:00:19,431 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:19,432 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 33, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:19,432 INFO L424 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:19,432 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:19,432 INFO L82 PathProgramCache]: Analyzing trace with hash -2072080341, now seen corresponding path program 33 times [2018-10-24 12:00:19,432 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:19,433 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:19,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:19,433 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:19,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:19,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:20,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:20,140 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:20,140 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 [2018-10-24 12:00:20,147 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 12:00:20,225 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-10-24 12:00:20,225 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:20,228 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:20,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:20,346 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:20,346 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-24 12:00:20,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-24 12:00:20,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-24 12:00:20,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2018-10-24 12:00:20,347 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 37 states. [2018-10-24 12:00:20,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:20,454 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-10-24 12:00:20,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-24 12:00:20,455 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 106 [2018-10-24 12:00:20,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:20,456 INFO L225 Difference]: With dead ends: 115 [2018-10-24 12:00:20,456 INFO L226 Difference]: Without dead ends: 111 [2018-10-24 12:00:20,457 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=636, Invalid=770, Unknown=0, NotChecked=0, Total=1406 [2018-10-24 12:00:20,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-24 12:00:20,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2018-10-24 12:00:20,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-24 12:00:20,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-10-24 12:00:20,460 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 106 [2018-10-24 12:00:20,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:20,461 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-10-24 12:00:20,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-24 12:00:20,461 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-10-24 12:00:20,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-10-24 12:00:20,462 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:20,462 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:20,462 INFO L424 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:20,462 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:20,462 INFO L82 PathProgramCache]: Analyzing trace with hash -432048944, now seen corresponding path program 34 times [2018-10-24 12:00:20,462 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:20,463 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:20,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:20,463 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:20,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:20,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:21,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:21,089 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:21,089 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 [2018-10-24 12:00:21,097 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 12:00:21,158 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 12:00:21,158 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:21,161 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:21,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:21,238 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:21,239 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-24 12:00:21,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-24 12:00:21,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-24 12:00:21,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2018-10-24 12:00:21,240 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 38 states. [2018-10-24 12:00:21,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:21,340 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2018-10-24 12:00:21,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-24 12:00:21,340 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 109 [2018-10-24 12:00:21,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:21,341 INFO L225 Difference]: With dead ends: 118 [2018-10-24 12:00:21,341 INFO L226 Difference]: Without dead ends: 114 [2018-10-24 12:00:21,342 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=672, Invalid=810, Unknown=0, NotChecked=0, Total=1482 [2018-10-24 12:00:21,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-24 12:00:21,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2018-10-24 12:00:21,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-24 12:00:21,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-10-24 12:00:21,346 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 109 [2018-10-24 12:00:21,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:21,346 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-10-24 12:00:21,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-24 12:00:21,347 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-10-24 12:00:21,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-24 12:00:21,347 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:21,347 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 35, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:21,348 INFO L424 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:21,348 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:21,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1804660213, now seen corresponding path program 35 times [2018-10-24 12:00:21,348 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:21,348 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:21,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:21,349 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:21,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:21,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:22,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:22,328 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:22,328 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 [2018-10-24 12:00:22,338 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 12:00:22,411 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-10-24 12:00:22,411 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:22,414 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:22,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:22,834 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:22,834 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-24 12:00:22,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-24 12:00:22,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-24 12:00:22,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2018-10-24 12:00:22,836 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 39 states. [2018-10-24 12:00:22,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:22,932 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-10-24 12:00:22,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-24 12:00:22,933 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 112 [2018-10-24 12:00:22,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:22,934 INFO L225 Difference]: With dead ends: 121 [2018-10-24 12:00:22,934 INFO L226 Difference]: Without dead ends: 117 [2018-10-24 12:00:22,935 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=709, Invalid=851, Unknown=0, NotChecked=0, Total=1560 [2018-10-24 12:00:22,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-24 12:00:22,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2018-10-24 12:00:22,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-24 12:00:22,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-10-24 12:00:22,937 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 112 [2018-10-24 12:00:22,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:22,938 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-10-24 12:00:22,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-24 12:00:22,938 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-10-24 12:00:22,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-10-24 12:00:22,939 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:22,939 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 36, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:22,939 INFO L424 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:22,939 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:22,939 INFO L82 PathProgramCache]: Analyzing trace with hash -883349776, now seen corresponding path program 36 times [2018-10-24 12:00:22,939 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:22,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:22,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:22,940 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:22,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:22,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:23,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:23,638 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:23,638 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 [2018-10-24 12:00:23,645 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 12:00:23,724 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-24 12:00:23,724 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:23,727 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:23,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:23,807 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:23,808 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-24 12:00:23,808 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-24 12:00:23,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-24 12:00:23,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2018-10-24 12:00:23,809 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 40 states. [2018-10-24 12:00:23,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:23,895 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2018-10-24 12:00:23,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-24 12:00:23,896 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 115 [2018-10-24 12:00:23,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:23,897 INFO L225 Difference]: With dead ends: 124 [2018-10-24 12:00:23,897 INFO L226 Difference]: Without dead ends: 120 [2018-10-24 12:00:23,898 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=747, Invalid=893, Unknown=0, NotChecked=0, Total=1640 [2018-10-24 12:00:23,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-10-24 12:00:23,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2018-10-24 12:00:23,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-24 12:00:23,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-10-24 12:00:23,902 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 115 [2018-10-24 12:00:23,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:23,902 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-10-24 12:00:23,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-24 12:00:23,902 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-10-24 12:00:23,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-24 12:00:23,903 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:23,903 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 37, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:23,903 INFO L424 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:23,903 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:23,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1034857451, now seen corresponding path program 37 times [2018-10-24 12:00:23,904 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:23,904 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:23,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:23,904 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:23,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:23,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:25,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:25,109 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:25,109 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 [2018-10-24 12:00:25,116 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:00:25,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:25,182 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:25,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:25,731 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:25,731 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-24 12:00:25,732 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-24 12:00:25,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-24 12:00:25,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2018-10-24 12:00:25,733 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 41 states. [2018-10-24 12:00:26,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:26,360 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-10-24 12:00:26,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-24 12:00:26,361 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 118 [2018-10-24 12:00:26,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:26,362 INFO L225 Difference]: With dead ends: 127 [2018-10-24 12:00:26,362 INFO L226 Difference]: Without dead ends: 123 [2018-10-24 12:00:26,363 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=786, Invalid=936, Unknown=0, NotChecked=0, Total=1722 [2018-10-24 12:00:26,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-24 12:00:26,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2018-10-24 12:00:26,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-10-24 12:00:26,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-10-24 12:00:26,366 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 118 [2018-10-24 12:00:26,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:26,367 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-10-24 12:00:26,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-24 12:00:26,367 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-10-24 12:00:26,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-10-24 12:00:26,367 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:26,367 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 38, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:26,367 INFO L424 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:26,368 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:26,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1806483728, now seen corresponding path program 38 times [2018-10-24 12:00:26,368 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:26,368 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:26,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:26,368 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:00:26,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:26,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:29,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2185 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:29,290 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:29,290 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 [2018-10-24 12:00:29,299 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 12:00:29,362 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 12:00:29,362 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:29,365 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:29,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2185 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:29,477 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:29,477 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-24 12:00:29,478 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-24 12:00:29,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-24 12:00:29,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2018-10-24 12:00:29,479 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 42 states. [2018-10-24 12:00:29,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:29,578 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2018-10-24 12:00:29,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-24 12:00:29,578 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 121 [2018-10-24 12:00:29,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:29,580 INFO L225 Difference]: With dead ends: 130 [2018-10-24 12:00:29,580 INFO L226 Difference]: Without dead ends: 126 [2018-10-24 12:00:29,581 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=826, Invalid=980, Unknown=0, NotChecked=0, Total=1806 [2018-10-24 12:00:29,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-10-24 12:00:29,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2018-10-24 12:00:29,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-24 12:00:29,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-10-24 12:00:29,583 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 121 [2018-10-24 12:00:29,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:29,584 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-10-24 12:00:29,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-24 12:00:29,584 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-10-24 12:00:29,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-10-24 12:00:29,585 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:29,585 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 39, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:29,585 INFO L424 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:29,585 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:29,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1635033653, now seen corresponding path program 39 times [2018-10-24 12:00:29,585 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:29,586 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:29,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:29,586 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:29,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:29,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:30,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2301 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:30,341 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:30,341 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 [2018-10-24 12:00:30,350 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 12:00:30,466 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-10-24 12:00:30,466 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:30,469 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:30,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2301 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:30,547 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:30,547 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-24 12:00:30,547 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-24 12:00:30,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-24 12:00:30,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2018-10-24 12:00:30,548 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 43 states. [2018-10-24 12:00:31,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:31,358 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-10-24 12:00:31,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-24 12:00:31,359 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 124 [2018-10-24 12:00:31,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:31,360 INFO L225 Difference]: With dead ends: 133 [2018-10-24 12:00:31,360 INFO L226 Difference]: Without dead ends: 129 [2018-10-24 12:00:31,361 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=867, Invalid=1025, Unknown=0, NotChecked=0, Total=1892 [2018-10-24 12:00:31,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-10-24 12:00:31,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2018-10-24 12:00:31,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-10-24 12:00:31,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-10-24 12:00:31,364 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 124 [2018-10-24 12:00:31,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:31,365 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-10-24 12:00:31,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-24 12:00:31,365 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-10-24 12:00:31,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-10-24 12:00:31,365 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:31,366 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 40, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:31,366 INFO L424 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:31,366 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:31,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1579959088, now seen corresponding path program 40 times [2018-10-24 12:00:31,366 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:31,367 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:31,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:31,367 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:31,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:31,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:32,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:32,759 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:32,759 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 [2018-10-24 12:00:32,769 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 12:00:32,844 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 12:00:32,844 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:32,847 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:32,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:33,019 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:33,019 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-24 12:00:33,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-24 12:00:33,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-24 12:00:33,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2018-10-24 12:00:33,021 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 44 states. [2018-10-24 12:00:33,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:33,217 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2018-10-24 12:00:33,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-24 12:00:33,217 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 127 [2018-10-24 12:00:33,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:33,218 INFO L225 Difference]: With dead ends: 136 [2018-10-24 12:00:33,218 INFO L226 Difference]: Without dead ends: 132 [2018-10-24 12:00:33,219 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=909, Invalid=1071, Unknown=0, NotChecked=0, Total=1980 [2018-10-24 12:00:33,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-10-24 12:00:33,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2018-10-24 12:00:33,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-24 12:00:33,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-10-24 12:00:33,223 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 127 [2018-10-24 12:00:33,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:33,223 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-10-24 12:00:33,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-24 12:00:33,223 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-10-24 12:00:33,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-24 12:00:33,224 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:33,224 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 41, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:33,224 INFO L424 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:33,224 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:33,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1658005419, now seen corresponding path program 41 times [2018-10-24 12:00:33,225 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:33,225 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:33,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:33,225 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:33,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:33,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:34,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2542 backedges. 0 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:34,366 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:34,367 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 [2018-10-24 12:00:34,373 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 12:00:34,661 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-10-24 12:00:34,661 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:34,664 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:34,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2542 backedges. 0 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:34,754 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:34,754 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-24 12:00:34,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-24 12:00:34,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-24 12:00:34,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2018-10-24 12:00:34,756 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 45 states. [2018-10-24 12:00:34,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:34,864 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-10-24 12:00:34,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-24 12:00:34,865 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 130 [2018-10-24 12:00:34,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:34,866 INFO L225 Difference]: With dead ends: 139 [2018-10-24 12:00:34,866 INFO L226 Difference]: Without dead ends: 135 [2018-10-24 12:00:34,867 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=952, Invalid=1118, Unknown=0, NotChecked=0, Total=2070 [2018-10-24 12:00:34,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-10-24 12:00:34,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2018-10-24 12:00:34,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-10-24 12:00:34,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2018-10-24 12:00:34,870 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 130 [2018-10-24 12:00:34,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:34,871 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2018-10-24 12:00:34,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-24 12:00:34,871 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2018-10-24 12:00:34,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-10-24 12:00:34,872 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:34,872 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 42, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:34,872 INFO L424 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:34,872 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:34,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1136022192, now seen corresponding path program 42 times [2018-10-24 12:00:34,873 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:34,873 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:34,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:34,873 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:34,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:34,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:36,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2667 backedges. 0 proven. 2667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:36,217 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:36,217 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 [2018-10-24 12:00:36,225 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 12:00:36,321 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-24 12:00:36,321 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:36,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:36,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2667 backedges. 0 proven. 2667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:36,405 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:36,406 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-24 12:00:36,406 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-24 12:00:36,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-24 12:00:36,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2018-10-24 12:00:36,407 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 46 states. [2018-10-24 12:00:36,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:36,498 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2018-10-24 12:00:36,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-24 12:00:36,499 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 133 [2018-10-24 12:00:36,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:36,500 INFO L225 Difference]: With dead ends: 142 [2018-10-24 12:00:36,500 INFO L226 Difference]: Without dead ends: 138 [2018-10-24 12:00:36,501 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=996, Invalid=1166, Unknown=0, NotChecked=0, Total=2162 [2018-10-24 12:00:36,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-24 12:00:36,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2018-10-24 12:00:36,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-10-24 12:00:36,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-10-24 12:00:36,504 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 133 [2018-10-24 12:00:36,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:36,505 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-10-24 12:00:36,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-24 12:00:36,505 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-10-24 12:00:36,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-10-24 12:00:36,505 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:36,506 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 43, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:36,506 INFO L424 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:36,506 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:36,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1546385013, now seen corresponding path program 43 times [2018-10-24 12:00:36,506 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:36,506 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:36,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:36,507 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:36,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:36,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:38,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2795 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:38,132 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:38,133 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 [2018-10-24 12:00:38,141 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:00:38,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:38,218 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:38,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2795 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:38,314 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:38,315 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-24 12:00:38,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-24 12:00:38,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-24 12:00:38,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2018-10-24 12:00:38,316 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 47 states. [2018-10-24 12:00:38,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:38,401 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-10-24 12:00:38,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-24 12:00:38,401 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 136 [2018-10-24 12:00:38,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:38,403 INFO L225 Difference]: With dead ends: 145 [2018-10-24 12:00:38,403 INFO L226 Difference]: Without dead ends: 141 [2018-10-24 12:00:38,404 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1041, Invalid=1215, Unknown=0, NotChecked=0, Total=2256 [2018-10-24 12:00:38,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-24 12:00:38,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2018-10-24 12:00:38,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-10-24 12:00:38,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2018-10-24 12:00:38,408 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 136 [2018-10-24 12:00:38,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:38,408 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2018-10-24 12:00:38,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-24 12:00:38,408 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2018-10-24 12:00:38,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-10-24 12:00:38,409 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:38,409 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 44, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:38,410 INFO L424 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:38,410 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:38,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1106706288, now seen corresponding path program 44 times [2018-10-24 12:00:38,410 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:38,410 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:38,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:38,411 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:00:38,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:38,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:39,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:39,416 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:39,416 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 [2018-10-24 12:00:39,423 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 12:00:39,497 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 12:00:39,497 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:39,500 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:39,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:39,602 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:39,602 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-24 12:00:39,602 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-24 12:00:39,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-24 12:00:39,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2018-10-24 12:00:39,603 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 48 states. [2018-10-24 12:00:39,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:39,696 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2018-10-24 12:00:39,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-24 12:00:39,697 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 139 [2018-10-24 12:00:39,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:39,698 INFO L225 Difference]: With dead ends: 148 [2018-10-24 12:00:39,698 INFO L226 Difference]: Without dead ends: 144 [2018-10-24 12:00:39,699 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1087, Invalid=1265, Unknown=0, NotChecked=0, Total=2352 [2018-10-24 12:00:39,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-10-24 12:00:39,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2018-10-24 12:00:39,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-24 12:00:39,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-10-24 12:00:39,703 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 139 [2018-10-24 12:00:39,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:39,703 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-10-24 12:00:39,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-24 12:00:39,704 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-10-24 12:00:39,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-24 12:00:39,704 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:39,704 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 45, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:39,705 INFO L424 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:39,705 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:39,705 INFO L82 PathProgramCache]: Analyzing trace with hash -933493909, now seen corresponding path program 45 times [2018-10-24 12:00:39,705 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:39,705 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:39,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:39,706 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:39,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:39,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:40,867 INFO L134 CoverageAnalysis]: Checked inductivity of 3060 backedges. 0 proven. 3060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:40,867 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:40,868 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 [2018-10-24 12:00:40,877 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 12:00:40,985 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-10-24 12:00:40,985 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:40,988 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:41,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3060 backedges. 0 proven. 3060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:41,233 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:41,233 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-24 12:00:41,233 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-24 12:00:41,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-24 12:00:41,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2018-10-24 12:00:41,234 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 49 states. [2018-10-24 12:00:41,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:41,416 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-10-24 12:00:41,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-24 12:00:41,417 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 142 [2018-10-24 12:00:41,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:41,418 INFO L225 Difference]: With dead ends: 151 [2018-10-24 12:00:41,418 INFO L226 Difference]: Without dead ends: 147 [2018-10-24 12:00:41,419 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1134, Invalid=1316, Unknown=0, NotChecked=0, Total=2450 [2018-10-24 12:00:41,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-24 12:00:41,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2018-10-24 12:00:41,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-10-24 12:00:41,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2018-10-24 12:00:41,422 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 142 [2018-10-24 12:00:41,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:41,423 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2018-10-24 12:00:41,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-24 12:00:41,423 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2018-10-24 12:00:41,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-10-24 12:00:41,423 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:41,423 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 46, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:41,424 INFO L424 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:41,424 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:41,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1839610256, now seen corresponding path program 46 times [2018-10-24 12:00:41,424 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:41,424 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:41,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:41,425 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:41,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:41,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:42,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3197 backedges. 0 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:42,688 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:42,688 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 [2018-10-24 12:00:42,697 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 12:00:42,772 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 12:00:42,772 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:42,776 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:42,974 INFO L134 CoverageAnalysis]: Checked inductivity of 3197 backedges. 0 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:43,005 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:43,005 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-24 12:00:43,006 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-24 12:00:43,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-24 12:00:43,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2018-10-24 12:00:43,007 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 50 states. [2018-10-24 12:00:43,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:43,208 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2018-10-24 12:00:43,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-24 12:00:43,210 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 145 [2018-10-24 12:00:43,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:43,210 INFO L225 Difference]: With dead ends: 154 [2018-10-24 12:00:43,210 INFO L226 Difference]: Without dead ends: 150 [2018-10-24 12:00:43,211 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1182, Invalid=1368, Unknown=0, NotChecked=0, Total=2550 [2018-10-24 12:00:43,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-10-24 12:00:43,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2018-10-24 12:00:43,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-10-24 12:00:43,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2018-10-24 12:00:43,214 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 145 [2018-10-24 12:00:43,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:43,214 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2018-10-24 12:00:43,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-24 12:00:43,215 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2018-10-24 12:00:43,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-24 12:00:43,215 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:43,216 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 47, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:43,216 INFO L424 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:43,216 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:43,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1689851211, now seen corresponding path program 47 times [2018-10-24 12:00:43,216 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:43,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:43,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:43,217 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:43,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:43,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:44,451 INFO L134 CoverageAnalysis]: Checked inductivity of 3337 backedges. 0 proven. 3337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:44,451 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:44,451 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 [2018-10-24 12:00:44,459 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 12:00:44,568 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-10-24 12:00:44,568 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:44,571 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:44,830 INFO L134 CoverageAnalysis]: Checked inductivity of 3337 backedges. 0 proven. 3337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:44,850 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:44,851 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-24 12:00:44,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-24 12:00:44,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-24 12:00:44,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2018-10-24 12:00:44,852 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 51 states. [2018-10-24 12:00:44,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:44,979 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-10-24 12:00:44,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-24 12:00:44,979 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 148 [2018-10-24 12:00:44,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:44,980 INFO L225 Difference]: With dead ends: 157 [2018-10-24 12:00:44,980 INFO L226 Difference]: Without dead ends: 153 [2018-10-24 12:00:44,981 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1231, Invalid=1421, Unknown=0, NotChecked=0, Total=2652 [2018-10-24 12:00:44,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-10-24 12:00:44,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2018-10-24 12:00:44,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-10-24 12:00:44,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2018-10-24 12:00:44,984 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 148 [2018-10-24 12:00:44,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:44,985 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2018-10-24 12:00:44,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-24 12:00:44,985 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2018-10-24 12:00:44,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-10-24 12:00:44,986 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:44,986 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 48, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:44,986 INFO L424 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:44,986 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:44,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1605805136, now seen corresponding path program 48 times [2018-10-24 12:00:44,987 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:44,987 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:44,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:44,988 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:44,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:45,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:46,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3480 backedges. 0 proven. 3480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:46,359 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:46,359 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 [2018-10-24 12:00:46,367 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 12:00:46,483 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-24 12:00:46,483 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:46,487 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:46,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3480 backedges. 0 proven. 3480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:46,592 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:46,592 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-24 12:00:46,592 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-24 12:00:46,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-24 12:00:46,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2018-10-24 12:00:46,593 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 52 states. [2018-10-24 12:00:46,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:46,715 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2018-10-24 12:00:46,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-24 12:00:46,716 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 151 [2018-10-24 12:00:46,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:46,716 INFO L225 Difference]: With dead ends: 160 [2018-10-24 12:00:46,717 INFO L226 Difference]: Without dead ends: 156 [2018-10-24 12:00:46,717 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1281, Invalid=1475, Unknown=0, NotChecked=0, Total=2756 [2018-10-24 12:00:46,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-10-24 12:00:46,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2018-10-24 12:00:46,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-10-24 12:00:46,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-10-24 12:00:46,720 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 151 [2018-10-24 12:00:46,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:46,720 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-10-24 12:00:46,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-24 12:00:46,721 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-10-24 12:00:46,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-10-24 12:00:46,721 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:46,722 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 49, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:46,722 INFO L424 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:46,722 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:46,722 INFO L82 PathProgramCache]: Analyzing trace with hash 448347947, now seen corresponding path program 49 times [2018-10-24 12:00:46,722 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:46,722 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:46,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:46,723 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:46,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:46,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:48,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3626 backedges. 0 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:48,111 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:48,111 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 [2018-10-24 12:00:48,118 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:00:48,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:48,203 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:48,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3626 backedges. 0 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:48,291 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:48,291 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-24 12:00:48,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-24 12:00:48,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-24 12:00:48,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2018-10-24 12:00:48,293 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 53 states. [2018-10-24 12:00:48,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:48,390 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-10-24 12:00:48,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-24 12:00:48,390 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 154 [2018-10-24 12:00:48,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:48,392 INFO L225 Difference]: With dead ends: 163 [2018-10-24 12:00:48,392 INFO L226 Difference]: Without dead ends: 159 [2018-10-24 12:00:48,393 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1332, Invalid=1530, Unknown=0, NotChecked=0, Total=2862 [2018-10-24 12:00:48,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-10-24 12:00:48,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2018-10-24 12:00:48,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-10-24 12:00:48,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2018-10-24 12:00:48,397 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 154 [2018-10-24 12:00:48,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:48,397 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2018-10-24 12:00:48,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-24 12:00:48,397 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2018-10-24 12:00:48,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-10-24 12:00:48,398 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:48,398 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 50, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:48,398 INFO L424 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:48,399 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:48,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1028810192, now seen corresponding path program 50 times [2018-10-24 12:00:48,399 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:48,399 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:48,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:48,400 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:00:48,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:48,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:49,541 INFO L134 CoverageAnalysis]: Checked inductivity of 3775 backedges. 0 proven. 3775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:49,542 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:49,542 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 [2018-10-24 12:00:49,549 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 12:00:49,630 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 12:00:49,630 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:49,634 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:49,771 INFO L134 CoverageAnalysis]: Checked inductivity of 3775 backedges. 0 proven. 3775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:49,792 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:49,792 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-24 12:00:49,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-24 12:00:49,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-24 12:00:49,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2018-10-24 12:00:49,794 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 54 states. [2018-10-24 12:00:49,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:49,955 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2018-10-24 12:00:49,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-24 12:00:49,955 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 157 [2018-10-24 12:00:49,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:49,957 INFO L225 Difference]: With dead ends: 166 [2018-10-24 12:00:49,957 INFO L226 Difference]: Without dead ends: 162 [2018-10-24 12:00:49,957 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1384, Invalid=1586, Unknown=0, NotChecked=0, Total=2970 [2018-10-24 12:00:49,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-10-24 12:00:49,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2018-10-24 12:00:49,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-10-24 12:00:49,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2018-10-24 12:00:49,960 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 157 [2018-10-24 12:00:49,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:49,961 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2018-10-24 12:00:49,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-24 12:00:49,961 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2018-10-24 12:00:49,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-10-24 12:00:49,962 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:49,962 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 51, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:49,962 INFO L424 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:49,963 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:49,963 INFO L82 PathProgramCache]: Analyzing trace with hash 2041217291, now seen corresponding path program 51 times [2018-10-24 12:00:49,963 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:49,963 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:49,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:49,964 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:49,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:50,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:51,480 INFO L134 CoverageAnalysis]: Checked inductivity of 3927 backedges. 0 proven. 3927 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:51,480 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:51,480 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 [2018-10-24 12:00:51,489 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 12:00:51,789 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-10-24 12:00:51,790 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:51,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:52,092 INFO L134 CoverageAnalysis]: Checked inductivity of 3927 backedges. 0 proven. 3927 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:52,113 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:52,114 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-24 12:00:52,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-24 12:00:52,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-24 12:00:52,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2018-10-24 12:00:52,115 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 55 states. [2018-10-24 12:00:52,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:52,353 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-10-24 12:00:52,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-24 12:00:52,354 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 160 [2018-10-24 12:00:52,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:52,355 INFO L225 Difference]: With dead ends: 169 [2018-10-24 12:00:52,355 INFO L226 Difference]: Without dead ends: 165 [2018-10-24 12:00:52,356 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1437, Invalid=1643, Unknown=0, NotChecked=0, Total=3080 [2018-10-24 12:00:52,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-10-24 12:00:52,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2018-10-24 12:00:52,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-10-24 12:00:52,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 164 transitions. [2018-10-24 12:00:52,359 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 164 transitions. Word has length 160 [2018-10-24 12:00:52,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:52,360 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 164 transitions. [2018-10-24 12:00:52,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-24 12:00:52,360 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 164 transitions. [2018-10-24 12:00:52,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-10-24 12:00:52,361 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:52,361 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 52, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:52,361 INFO L424 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:52,361 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:52,362 INFO L82 PathProgramCache]: Analyzing trace with hash -894216208, now seen corresponding path program 52 times [2018-10-24 12:00:52,362 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:52,362 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:52,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:52,362 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:52,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:52,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:53,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4082 backedges. 0 proven. 4082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:53,650 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:53,650 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 [2018-10-24 12:00:53,660 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 12:00:53,747 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 12:00:53,747 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:53,750 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:53,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4082 backedges. 0 proven. 4082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:53,854 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:53,855 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-24 12:00:53,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-24 12:00:53,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-24 12:00:53,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2018-10-24 12:00:53,856 INFO L87 Difference]: Start difference. First operand 164 states and 164 transitions. Second operand 56 states. [2018-10-24 12:00:54,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:54,015 INFO L93 Difference]: Finished difference Result 172 states and 172 transitions. [2018-10-24 12:00:54,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-24 12:00:54,015 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 163 [2018-10-24 12:00:54,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:54,016 INFO L225 Difference]: With dead ends: 172 [2018-10-24 12:00:54,016 INFO L226 Difference]: Without dead ends: 168 [2018-10-24 12:00:54,017 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1491, Invalid=1701, Unknown=0, NotChecked=0, Total=3192 [2018-10-24 12:00:54,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-10-24 12:00:54,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2018-10-24 12:00:54,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-10-24 12:00:54,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2018-10-24 12:00:54,020 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 163 [2018-10-24 12:00:54,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:54,020 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2018-10-24 12:00:54,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-24 12:00:54,020 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2018-10-24 12:00:54,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-10-24 12:00:54,021 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:54,021 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 53, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:54,021 INFO L424 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:54,021 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:54,022 INFO L82 PathProgramCache]: Analyzing trace with hash -564471061, now seen corresponding path program 53 times [2018-10-24 12:00:54,022 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:54,022 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:54,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:54,023 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:54,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:54,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:55,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4240 backedges. 0 proven. 4240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:55,268 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:55,268 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 [2018-10-24 12:00:55,276 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 12:00:55,402 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-10-24 12:00:55,402 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:55,405 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:56,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4240 backedges. 0 proven. 4240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:56,170 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:56,170 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-24 12:00:56,171 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-24 12:00:56,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-24 12:00:56,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2018-10-24 12:00:56,172 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 57 states. [2018-10-24 12:00:56,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:56,832 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2018-10-24 12:00:56,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-24 12:00:56,832 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 166 [2018-10-24 12:00:56,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:56,834 INFO L225 Difference]: With dead ends: 175 [2018-10-24 12:00:56,834 INFO L226 Difference]: Without dead ends: 171 [2018-10-24 12:00:56,834 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1546, Invalid=1760, Unknown=0, NotChecked=0, Total=3306 [2018-10-24 12:00:56,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-24 12:00:56,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 170. [2018-10-24 12:00:56,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2018-10-24 12:00:56,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 170 transitions. [2018-10-24 12:00:56,837 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 170 transitions. Word has length 166 [2018-10-24 12:00:56,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:56,838 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 170 transitions. [2018-10-24 12:00:56,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-24 12:00:56,838 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 170 transitions. [2018-10-24 12:00:56,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2018-10-24 12:00:56,838 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:56,838 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 54, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:56,839 INFO L424 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:56,839 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:56,839 INFO L82 PathProgramCache]: Analyzing trace with hash 282997264, now seen corresponding path program 54 times [2018-10-24 12:00:56,839 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:56,839 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:56,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:56,840 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:56,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:56,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:58,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4401 backedges. 0 proven. 4401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:58,580 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:58,580 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:00:58,587 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 12:00:58,721 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-10-24 12:00:58,721 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:58,725 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:58,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4401 backedges. 0 proven. 4401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:58,819 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:58,819 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-24 12:00:58,820 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-24 12:00:58,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-24 12:00:58,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2018-10-24 12:00:58,821 INFO L87 Difference]: Start difference. First operand 170 states and 170 transitions. Second operand 58 states. [2018-10-24 12:00:58,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:58,928 INFO L93 Difference]: Finished difference Result 178 states and 178 transitions. [2018-10-24 12:00:58,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-24 12:00:58,928 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 169 [2018-10-24 12:00:58,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:58,929 INFO L225 Difference]: With dead ends: 178 [2018-10-24 12:00:58,930 INFO L226 Difference]: Without dead ends: 174 [2018-10-24 12:00:58,930 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 169 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1602, Invalid=1820, Unknown=0, NotChecked=0, Total=3422 [2018-10-24 12:00:58,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-10-24 12:00:58,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2018-10-24 12:00:58,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-10-24 12:00:58,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2018-10-24 12:00:58,933 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 169 [2018-10-24 12:00:58,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:58,934 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2018-10-24 12:00:58,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-24 12:00:58,934 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2018-10-24 12:00:58,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-10-24 12:00:58,935 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:58,935 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 55, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:58,935 INFO L424 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:58,935 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:58,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1394101451, now seen corresponding path program 55 times [2018-10-24 12:00:58,935 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:58,935 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:58,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:58,936 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:58,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:58,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:00,464 INFO L134 CoverageAnalysis]: Checked inductivity of 4565 backedges. 0 proven. 4565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:00,465 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:01:00,465 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:01:00,472 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:01:00,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:00,567 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:01:00,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4565 backedges. 0 proven. 4565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:00,918 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:01:00,918 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-24 12:01:00,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-24 12:01:00,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-24 12:01:00,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2018-10-24 12:01:00,919 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 59 states. [2018-10-24 12:01:01,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:01:01,038 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2018-10-24 12:01:01,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-24 12:01:01,038 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 172 [2018-10-24 12:01:01,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:01:01,040 INFO L225 Difference]: With dead ends: 181 [2018-10-24 12:01:01,040 INFO L226 Difference]: Without dead ends: 177 [2018-10-24 12:01:01,040 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 172 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1659, Invalid=1881, Unknown=0, NotChecked=0, Total=3540 [2018-10-24 12:01:01,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-10-24 12:01:01,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2018-10-24 12:01:01,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-10-24 12:01:01,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 176 transitions. [2018-10-24 12:01:01,044 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 176 transitions. Word has length 172 [2018-10-24 12:01:01,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:01:01,044 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 176 transitions. [2018-10-24 12:01:01,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-24 12:01:01,044 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 176 transitions. [2018-10-24 12:01:01,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2018-10-24 12:01:01,045 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:01:01,045 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 56, 1, 1, 1, 1, 1, 1] [2018-10-24 12:01:01,045 INFO L424 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:01:01,045 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:01:01,045 INFO L82 PathProgramCache]: Analyzing trace with hash 985986096, now seen corresponding path program 56 times [2018-10-24 12:01:01,045 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:01:01,045 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:01:01,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:01,046 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:01:01,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:01,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:02,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4732 backedges. 0 proven. 4732 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:02,297 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:01:02,297 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:01:02,304 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 12:01:02,399 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 12:01:02,399 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:01:02,402 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:01:02,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4732 backedges. 0 proven. 4732 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:02,759 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:01:02,759 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-10-24 12:01:02,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-24 12:01:02,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-24 12:01:02,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2018-10-24 12:01:02,760 INFO L87 Difference]: Start difference. First operand 176 states and 176 transitions. Second operand 60 states. [2018-10-24 12:01:02,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:01:02,927 INFO L93 Difference]: Finished difference Result 184 states and 184 transitions. [2018-10-24 12:01:02,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-24 12:01:02,928 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 175 [2018-10-24 12:01:02,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:01:02,929 INFO L225 Difference]: With dead ends: 184 [2018-10-24 12:01:02,929 INFO L226 Difference]: Without dead ends: 180 [2018-10-24 12:01:02,930 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 175 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1717, Invalid=1943, Unknown=0, NotChecked=0, Total=3660 [2018-10-24 12:01:02,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2018-10-24 12:01:02,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2018-10-24 12:01:02,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-10-24 12:01:02,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2018-10-24 12:01:02,934 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 175 [2018-10-24 12:01:02,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:01:02,934 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2018-10-24 12:01:02,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-24 12:01:02,935 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2018-10-24 12:01:02,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-10-24 12:01:02,935 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:01:02,936 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 57, 1, 1, 1, 1, 1, 1] [2018-10-24 12:01:02,936 INFO L424 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:01:02,936 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:01:02,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1873860267, now seen corresponding path program 57 times [2018-10-24 12:01:02,936 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:01:02,936 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:01:02,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:02,937 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:01:02,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:02,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:04,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4902 backedges. 0 proven. 4902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:04,364 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:01:04,364 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:01:04,372 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 12:01:04,515 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-10-24 12:01:04,515 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:01:04,519 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:01:04,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4902 backedges. 0 proven. 4902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:04,618 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:01:04,619 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-24 12:01:04,619 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-24 12:01:04,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-24 12:01:04,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2018-10-24 12:01:04,620 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 61 states. [2018-10-24 12:01:04,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:01:04,793 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2018-10-24 12:01:04,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-24 12:01:04,794 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 178 [2018-10-24 12:01:04,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:01:04,795 INFO L225 Difference]: With dead ends: 187 [2018-10-24 12:01:04,795 INFO L226 Difference]: Without dead ends: 183 [2018-10-24 12:01:04,795 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1776, Invalid=2006, Unknown=0, NotChecked=0, Total=3782 [2018-10-24 12:01:04,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-10-24 12:01:04,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 182. [2018-10-24 12:01:04,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-10-24 12:01:04,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 182 transitions. [2018-10-24 12:01:04,799 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 182 transitions. Word has length 178 [2018-10-24 12:01:04,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:01:04,799 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 182 transitions. [2018-10-24 12:01:04,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-24 12:01:04,799 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 182 transitions. [2018-10-24 12:01:04,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-10-24 12:01:04,800 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:01:04,800 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 58, 1, 1, 1, 1, 1, 1] [2018-10-24 12:01:04,801 INFO L424 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:01:04,801 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:01:04,801 INFO L82 PathProgramCache]: Analyzing trace with hash -170287536, now seen corresponding path program 58 times [2018-10-24 12:01:04,801 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:01:04,801 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:01:04,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:04,802 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:01:04,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:04,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:06,174 INFO L134 CoverageAnalysis]: Checked inductivity of 5075 backedges. 0 proven. 5075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:06,174 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:01:06,174 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:01:06,183 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 12:01:06,289 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 12:01:06,290 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:01:06,293 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:01:06,376 INFO L134 CoverageAnalysis]: Checked inductivity of 5075 backedges. 0 proven. 5075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:06,396 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:01:06,397 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-10-24 12:01:06,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-24 12:01:06,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-24 12:01:06,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2018-10-24 12:01:06,398 INFO L87 Difference]: Start difference. First operand 182 states and 182 transitions. Second operand 62 states. [2018-10-24 12:01:06,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:01:06,531 INFO L93 Difference]: Finished difference Result 190 states and 190 transitions. [2018-10-24 12:01:06,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-24 12:01:06,531 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 181 [2018-10-24 12:01:06,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:01:06,533 INFO L225 Difference]: With dead ends: 190 [2018-10-24 12:01:06,533 INFO L226 Difference]: Without dead ends: 186 [2018-10-24 12:01:06,533 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1836, Invalid=2070, Unknown=0, NotChecked=0, Total=3906 [2018-10-24 12:01:06,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-10-24 12:01:06,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2018-10-24 12:01:06,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-10-24 12:01:06,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2018-10-24 12:01:06,537 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 181 [2018-10-24 12:01:06,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:01:06,538 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2018-10-24 12:01:06,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-24 12:01:06,538 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2018-10-24 12:01:06,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-10-24 12:01:06,539 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:01:06,539 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 59, 1, 1, 1, 1, 1, 1] [2018-10-24 12:01:06,539 INFO L424 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:01:06,540 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:01:06,540 INFO L82 PathProgramCache]: Analyzing trace with hash 963803275, now seen corresponding path program 59 times [2018-10-24 12:01:06,540 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:01:06,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:01:06,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:06,541 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:01:06,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:06,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:08,427 INFO L134 CoverageAnalysis]: Checked inductivity of 5251 backedges. 0 proven. 5251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:08,427 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:01:08,427 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:01:08,435 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 12:01:08,578 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-10-24 12:01:08,578 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:01:08,582 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:01:08,742 INFO L134 CoverageAnalysis]: Checked inductivity of 5251 backedges. 0 proven. 5251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:08,763 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:01:08,763 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-24 12:01:08,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-24 12:01:08,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-24 12:01:08,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2018-10-24 12:01:08,764 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand 63 states. [2018-10-24 12:01:08,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:01:08,930 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2018-10-24 12:01:08,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-24 12:01:08,930 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 184 [2018-10-24 12:01:08,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:01:08,931 INFO L225 Difference]: With dead ends: 193 [2018-10-24 12:01:08,931 INFO L226 Difference]: Without dead ends: 189 [2018-10-24 12:01:08,932 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 184 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1897, Invalid=2135, Unknown=0, NotChecked=0, Total=4032 [2018-10-24 12:01:08,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-10-24 12:01:08,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2018-10-24 12:01:08,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2018-10-24 12:01:08,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 188 transitions. [2018-10-24 12:01:08,935 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 188 transitions. Word has length 184 [2018-10-24 12:01:08,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:01:08,935 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 188 transitions. [2018-10-24 12:01:08,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-24 12:01:08,935 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 188 transitions. [2018-10-24 12:01:08,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2018-10-24 12:01:08,936 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:01:08,936 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 60, 1, 1, 1, 1, 1, 1] [2018-10-24 12:01:08,936 INFO L424 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:01:08,936 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:01:08,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1844563856, now seen corresponding path program 60 times [2018-10-24 12:01:08,936 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:01:08,937 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:01:08,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:08,937 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:01:08,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:08,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:10,479 INFO L134 CoverageAnalysis]: Checked inductivity of 5430 backedges. 0 proven. 5430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:10,479 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:01:10,479 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:01:10,488 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 12:01:10,633 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-10-24 12:01:10,634 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:01:10,637 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:01:10,716 INFO L134 CoverageAnalysis]: Checked inductivity of 5430 backedges. 0 proven. 5430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:10,736 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:01:10,736 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-10-24 12:01:10,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-24 12:01:10,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-24 12:01:10,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2018-10-24 12:01:10,738 INFO L87 Difference]: Start difference. First operand 188 states and 188 transitions. Second operand 64 states. [2018-10-24 12:01:10,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:01:10,903 INFO L93 Difference]: Finished difference Result 196 states and 196 transitions. [2018-10-24 12:01:10,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-24 12:01:10,903 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 187 [2018-10-24 12:01:10,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:01:10,904 INFO L225 Difference]: With dead ends: 196 [2018-10-24 12:01:10,904 INFO L226 Difference]: Without dead ends: 192 [2018-10-24 12:01:10,905 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1959, Invalid=2201, Unknown=0, NotChecked=0, Total=4160 [2018-10-24 12:01:10,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2018-10-24 12:01:10,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 191. [2018-10-24 12:01:10,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-10-24 12:01:10,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2018-10-24 12:01:10,909 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 187 [2018-10-24 12:01:10,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:01:10,909 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2018-10-24 12:01:10,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-24 12:01:10,909 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2018-10-24 12:01:10,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-10-24 12:01:10,910 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:01:10,910 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 61, 1, 1, 1, 1, 1, 1] [2018-10-24 12:01:10,911 INFO L424 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:01:10,911 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:01:10,911 INFO L82 PathProgramCache]: Analyzing trace with hash 53162603, now seen corresponding path program 61 times [2018-10-24 12:01:10,911 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:01:10,911 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:01:10,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:10,912 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:01:10,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:10,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:12,544 INFO L134 CoverageAnalysis]: Checked inductivity of 5612 backedges. 0 proven. 5612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:12,544 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:01:12,545 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:01:12,552 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:01:12,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:12,651 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:01:12,727 INFO L134 CoverageAnalysis]: Checked inductivity of 5612 backedges. 0 proven. 5612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:12,749 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:01:12,749 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-10-24 12:01:12,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-24 12:01:12,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-24 12:01:12,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2018-10-24 12:01:12,751 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand 65 states. [2018-10-24 12:01:13,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:01:13,016 INFO L93 Difference]: Finished difference Result 199 states and 199 transitions. [2018-10-24 12:01:13,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-24 12:01:13,016 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 190 [2018-10-24 12:01:13,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:01:13,017 INFO L225 Difference]: With dead ends: 199 [2018-10-24 12:01:13,017 INFO L226 Difference]: Without dead ends: 195 [2018-10-24 12:01:13,018 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 190 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2022, Invalid=2268, Unknown=0, NotChecked=0, Total=4290 [2018-10-24 12:01:13,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-10-24 12:01:13,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2018-10-24 12:01:13,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-10-24 12:01:13,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 194 transitions. [2018-10-24 12:01:13,020 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 194 transitions. Word has length 190 [2018-10-24 12:01:13,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:01:13,020 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 194 transitions. [2018-10-24 12:01:13,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-24 12:01:13,021 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 194 transitions. [2018-10-24 12:01:13,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-10-24 12:01:13,021 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:01:13,021 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 62, 1, 1, 1, 1, 1, 1] [2018-10-24 12:01:13,022 INFO L424 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:01:13,022 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:01:13,022 INFO L82 PathProgramCache]: Analyzing trace with hash 567585424, now seen corresponding path program 62 times [2018-10-24 12:01:13,022 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:01:13,022 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:01:13,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:13,023 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:01:13,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:13,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:14,572 INFO L134 CoverageAnalysis]: Checked inductivity of 5797 backedges. 0 proven. 5797 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:14,572 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:01:14,572 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:01:14,580 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 12:01:14,677 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 12:01:14,677 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:01:14,680 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:01:14,762 INFO L134 CoverageAnalysis]: Checked inductivity of 5797 backedges. 0 proven. 5797 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:14,782 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:01:14,782 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-10-24 12:01:14,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-24 12:01:14,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-24 12:01:14,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2018-10-24 12:01:14,783 INFO L87 Difference]: Start difference. First operand 194 states and 194 transitions. Second operand 66 states. [2018-10-24 12:01:14,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:01:14,929 INFO L93 Difference]: Finished difference Result 202 states and 202 transitions. [2018-10-24 12:01:14,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-24 12:01:14,930 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 193 [2018-10-24 12:01:14,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:01:14,931 INFO L225 Difference]: With dead ends: 202 [2018-10-24 12:01:14,932 INFO L226 Difference]: Without dead ends: 198 [2018-10-24 12:01:14,932 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2086, Invalid=2336, Unknown=0, NotChecked=0, Total=4422 [2018-10-24 12:01:14,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2018-10-24 12:01:14,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 197. [2018-10-24 12:01:14,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-10-24 12:01:14,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2018-10-24 12:01:14,936 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 193 [2018-10-24 12:01:14,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:01:14,937 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2018-10-24 12:01:14,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-24 12:01:14,937 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2018-10-24 12:01:14,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-10-24 12:01:14,938 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:01:14,938 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 63, 1, 1, 1, 1, 1, 1] [2018-10-24 12:01:14,938 INFO L424 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:01:14,938 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:01:14,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1294533707, now seen corresponding path program 63 times [2018-10-24 12:01:14,939 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:01:14,939 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:01:14,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:14,940 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:01:14,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:14,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:16,496 INFO L134 CoverageAnalysis]: Checked inductivity of 5985 backedges. 0 proven. 5985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:16,496 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:01:16,496 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:01:16,505 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 12:01:16,658 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-10-24 12:01:16,659 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:01:16,663 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:01:16,739 INFO L134 CoverageAnalysis]: Checked inductivity of 5985 backedges. 0 proven. 5985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:16,760 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:01:16,760 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-24 12:01:16,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-24 12:01:16,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-24 12:01:16,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2018-10-24 12:01:16,761 INFO L87 Difference]: Start difference. First operand 197 states and 197 transitions. Second operand 67 states. [2018-10-24 12:01:16,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:01:16,953 INFO L93 Difference]: Finished difference Result 205 states and 205 transitions. [2018-10-24 12:01:16,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-24 12:01:16,953 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 196 [2018-10-24 12:01:16,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:01:16,954 INFO L225 Difference]: With dead ends: 205 [2018-10-24 12:01:16,954 INFO L226 Difference]: Without dead ends: 201 [2018-10-24 12:01:16,955 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 196 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2151, Invalid=2405, Unknown=0, NotChecked=0, Total=4556 [2018-10-24 12:01:16,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-10-24 12:01:16,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2018-10-24 12:01:16,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2018-10-24 12:01:16,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 200 transitions. [2018-10-24 12:01:16,959 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 200 transitions. Word has length 196 [2018-10-24 12:01:16,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:01:16,959 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 200 transitions. [2018-10-24 12:01:16,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-24 12:01:16,959 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 200 transitions. [2018-10-24 12:01:16,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2018-10-24 12:01:16,960 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:01:16,960 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 64, 1, 1, 1, 1, 1, 1] [2018-10-24 12:01:16,961 INFO L424 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:01:16,961 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:01:16,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1709241168, now seen corresponding path program 64 times [2018-10-24 12:01:16,961 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:01:16,961 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:01:16,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:16,962 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:01:16,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:17,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:18,970 INFO L134 CoverageAnalysis]: Checked inductivity of 6176 backedges. 0 proven. 6176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:18,970 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:01:18,970 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:01:18,981 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 12:01:19,086 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 12:01:19,086 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:01:19,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:01:19,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6176 backedges. 0 proven. 6176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:19,322 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:01:19,323 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-10-24 12:01:19,323 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-24 12:01:19,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-24 12:01:19,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2018-10-24 12:01:19,324 INFO L87 Difference]: Start difference. First operand 200 states and 200 transitions. Second operand 68 states. [2018-10-24 12:01:19,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:01:19,505 INFO L93 Difference]: Finished difference Result 208 states and 208 transitions. [2018-10-24 12:01:19,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-24 12:01:19,505 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 199 [2018-10-24 12:01:19,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:01:19,506 INFO L225 Difference]: With dead ends: 208 [2018-10-24 12:01:19,506 INFO L226 Difference]: Without dead ends: 204 [2018-10-24 12:01:19,506 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2217, Invalid=2475, Unknown=0, NotChecked=0, Total=4692 [2018-10-24 12:01:19,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2018-10-24 12:01:19,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 203. [2018-10-24 12:01:19,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-10-24 12:01:19,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2018-10-24 12:01:19,510 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 199 [2018-10-24 12:01:19,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:01:19,510 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2018-10-24 12:01:19,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-24 12:01:19,511 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2018-10-24 12:01:19,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-10-24 12:01:19,511 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:01:19,511 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 65, 1, 1, 1, 1, 1, 1] [2018-10-24 12:01:19,512 INFO L424 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:01:19,512 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:01:19,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1522930133, now seen corresponding path program 65 times [2018-10-24 12:01:19,512 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:01:19,512 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:01:19,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:19,513 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:01:19,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:19,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:21,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6370 backedges. 0 proven. 6370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:21,140 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:01:21,140 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:01:21,147 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 12:01:21,308 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-10-24 12:01:21,308 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:01:21,312 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:01:21,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6370 backedges. 0 proven. 6370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:21,460 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:01:21,461 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-24 12:01:21,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-24 12:01:21,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-24 12:01:21,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2018-10-24 12:01:21,462 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand 69 states. [2018-10-24 12:01:21,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:01:21,601 INFO L93 Difference]: Finished difference Result 211 states and 211 transitions. [2018-10-24 12:01:21,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-24 12:01:21,602 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 202 [2018-10-24 12:01:21,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:01:21,603 INFO L225 Difference]: With dead ends: 211 [2018-10-24 12:01:21,603 INFO L226 Difference]: Without dead ends: 207 [2018-10-24 12:01:21,604 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 202 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2284, Invalid=2546, Unknown=0, NotChecked=0, Total=4830 [2018-10-24 12:01:21,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-10-24 12:01:21,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 206. [2018-10-24 12:01:21,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2018-10-24 12:01:21,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 206 transitions. [2018-10-24 12:01:21,607 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 206 transitions. Word has length 202 [2018-10-24 12:01:21,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:01:21,607 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 206 transitions. [2018-10-24 12:01:21,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-24 12:01:21,608 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 206 transitions. [2018-10-24 12:01:21,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2018-10-24 12:01:21,608 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:01:21,608 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 66, 1, 1, 1, 1, 1, 1] [2018-10-24 12:01:21,609 INFO L424 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:01:21,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:01:21,609 INFO L82 PathProgramCache]: Analyzing trace with hash -228632880, now seen corresponding path program 66 times [2018-10-24 12:01:21,609 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:01:21,609 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:01:21,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:21,610 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:01:21,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:21,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:23,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6567 backedges. 0 proven. 6567 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:23,623 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:01:23,623 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:01:23,630 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 12:01:23,792 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-10-24 12:01:23,792 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:01:23,796 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:01:23,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6567 backedges. 0 proven. 6567 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:23,898 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:01:23,898 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-10-24 12:01:23,899 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-24 12:01:23,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-24 12:01:23,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2018-10-24 12:01:23,899 INFO L87 Difference]: Start difference. First operand 206 states and 206 transitions. Second operand 70 states. [2018-10-24 12:01:24,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:01:24,107 INFO L93 Difference]: Finished difference Result 214 states and 214 transitions. [2018-10-24 12:01:24,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-24 12:01:24,107 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 205 [2018-10-24 12:01:24,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:01:24,108 INFO L225 Difference]: With dead ends: 214 [2018-10-24 12:01:24,108 INFO L226 Difference]: Without dead ends: 210 [2018-10-24 12:01:24,109 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 205 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2352, Invalid=2618, Unknown=0, NotChecked=0, Total=4970 [2018-10-24 12:01:24,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2018-10-24 12:01:24,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2018-10-24 12:01:24,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-10-24 12:01:24,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 209 transitions. [2018-10-24 12:01:24,113 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 209 transitions. Word has length 205 [2018-10-24 12:01:24,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:01:24,113 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 209 transitions. [2018-10-24 12:01:24,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-24 12:01:24,113 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 209 transitions. [2018-10-24 12:01:24,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-10-24 12:01:24,114 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:01:24,114 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 67, 1, 1, 1, 1, 1, 1] [2018-10-24 12:01:24,115 INFO L424 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:01:24,115 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:01:24,115 INFO L82 PathProgramCache]: Analyzing trace with hash -2035552245, now seen corresponding path program 67 times [2018-10-24 12:01:24,115 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:01:24,115 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:01:24,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:24,116 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:01:24,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:24,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:25,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6767 backedges. 0 proven. 6767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:25,853 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:01:25,853 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:01:25,860 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:01:25,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:25,968 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:01:26,265 INFO L134 CoverageAnalysis]: Checked inductivity of 6767 backedges. 0 proven. 6767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:26,286 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:01:26,286 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-10-24 12:01:26,286 INFO L460 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-24 12:01:26,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-24 12:01:26,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2018-10-24 12:01:26,287 INFO L87 Difference]: Start difference. First operand 209 states and 209 transitions. Second operand 71 states. [2018-10-24 12:01:26,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:01:26,524 INFO L93 Difference]: Finished difference Result 217 states and 217 transitions. [2018-10-24 12:01:26,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-24 12:01:26,524 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 208 [2018-10-24 12:01:26,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:01:26,525 INFO L225 Difference]: With dead ends: 217 [2018-10-24 12:01:26,525 INFO L226 Difference]: Without dead ends: 213 [2018-10-24 12:01:26,526 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 208 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2421, Invalid=2691, Unknown=0, NotChecked=0, Total=5112 [2018-10-24 12:01:26,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-10-24 12:01:26,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 212. [2018-10-24 12:01:26,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2018-10-24 12:01:26,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 212 transitions. [2018-10-24 12:01:26,529 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 212 transitions. Word has length 208 [2018-10-24 12:01:26,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:01:26,529 INFO L481 AbstractCegarLoop]: Abstraction has 212 states and 212 transitions. [2018-10-24 12:01:26,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-24 12:01:26,530 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 212 transitions. [2018-10-24 12:01:26,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2018-10-24 12:01:26,531 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:01:26,531 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 68, 1, 1, 1, 1, 1, 1] [2018-10-24 12:01:26,531 INFO L424 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:01:26,531 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:01:26,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1149733104, now seen corresponding path program 68 times [2018-10-24 12:01:26,532 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:01:26,532 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:01:26,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:26,532 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:01:26,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:26,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:28,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6970 backedges. 0 proven. 6970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:28,762 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:01:28,762 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:01:28,768 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 12:01:28,873 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 12:01:28,874 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:01:28,877 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:01:28,970 INFO L134 CoverageAnalysis]: Checked inductivity of 6970 backedges. 0 proven. 6970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:28,990 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:01:28,990 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-10-24 12:01:28,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-24 12:01:28,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-24 12:01:28,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2018-10-24 12:01:28,991 INFO L87 Difference]: Start difference. First operand 212 states and 212 transitions. Second operand 72 states. [2018-10-24 12:01:29,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:01:29,166 INFO L93 Difference]: Finished difference Result 220 states and 220 transitions. [2018-10-24 12:01:29,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-24 12:01:29,167 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 211 [2018-10-24 12:01:29,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:01:29,168 INFO L225 Difference]: With dead ends: 220 [2018-10-24 12:01:29,168 INFO L226 Difference]: Without dead ends: 216 [2018-10-24 12:01:29,168 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 211 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2491, Invalid=2765, Unknown=0, NotChecked=0, Total=5256 [2018-10-24 12:01:29,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2018-10-24 12:01:29,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 215. [2018-10-24 12:01:29,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-10-24 12:01:29,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 215 transitions. [2018-10-24 12:01:29,172 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 215 transitions. Word has length 211 [2018-10-24 12:01:29,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:01:29,173 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 215 transitions. [2018-10-24 12:01:29,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-24 12:01:29,173 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 215 transitions. [2018-10-24 12:01:29,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-10-24 12:01:29,174 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:01:29,174 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 69, 1, 1, 1, 1, 1, 1] [2018-10-24 12:01:29,174 INFO L424 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:01:29,174 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:01:29,175 INFO L82 PathProgramCache]: Analyzing trace with hash 978127339, now seen corresponding path program 69 times [2018-10-24 12:01:29,175 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:01:29,175 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:01:29,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:29,175 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:01:29,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:29,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:31,027 INFO L134 CoverageAnalysis]: Checked inductivity of 7176 backedges. 0 proven. 7176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:31,027 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:01:31,027 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:01:31,035 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 12:01:31,217 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-10-24 12:01:31,217 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:01:31,221 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:01:31,323 INFO L134 CoverageAnalysis]: Checked inductivity of 7176 backedges. 0 proven. 7176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:31,345 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:01:31,345 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-24 12:01:31,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-24 12:01:31,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-24 12:01:31,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2018-10-24 12:01:31,346 INFO L87 Difference]: Start difference. First operand 215 states and 215 transitions. Second operand 73 states. [2018-10-24 12:01:31,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:01:31,519 INFO L93 Difference]: Finished difference Result 223 states and 223 transitions. [2018-10-24 12:01:31,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-24 12:01:31,519 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 214 [2018-10-24 12:01:31,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:01:31,520 INFO L225 Difference]: With dead ends: 223 [2018-10-24 12:01:31,520 INFO L226 Difference]: Without dead ends: 219 [2018-10-24 12:01:31,521 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 214 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2562, Invalid=2840, Unknown=0, NotChecked=0, Total=5402 [2018-10-24 12:01:31,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-10-24 12:01:31,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 218. [2018-10-24 12:01:31,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2018-10-24 12:01:31,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 218 transitions. [2018-10-24 12:01:31,524 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 218 transitions. Word has length 214 [2018-10-24 12:01:31,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:01:31,525 INFO L481 AbstractCegarLoop]: Abstraction has 218 states and 218 transitions. [2018-10-24 12:01:31,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-24 12:01:31,525 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 218 transitions. [2018-10-24 12:01:31,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-10-24 12:01:31,526 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:01:31,526 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 70, 1, 1, 1, 1, 1, 1] [2018-10-24 12:01:31,526 INFO L424 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:01:31,526 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:01:31,526 INFO L82 PathProgramCache]: Analyzing trace with hash -318135536, now seen corresponding path program 70 times [2018-10-24 12:01:31,526 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:01:31,526 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:01:31,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:31,527 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:01:31,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:31,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:33,692 INFO L134 CoverageAnalysis]: Checked inductivity of 7385 backedges. 0 proven. 7385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:33,692 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:01:33,692 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:01:33,700 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 12:01:33,809 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 12:01:33,809 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:01:33,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:01:33,985 INFO L134 CoverageAnalysis]: Checked inductivity of 7385 backedges. 0 proven. 7385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:34,006 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:01:34,007 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-10-24 12:01:34,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-24 12:01:34,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-24 12:01:34,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2018-10-24 12:01:34,008 INFO L87 Difference]: Start difference. First operand 218 states and 218 transitions. Second operand 74 states. [2018-10-24 12:01:34,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:01:34,241 INFO L93 Difference]: Finished difference Result 226 states and 226 transitions. [2018-10-24 12:01:34,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-24 12:01:34,241 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 217 [2018-10-24 12:01:34,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:01:34,242 INFO L225 Difference]: With dead ends: 226 [2018-10-24 12:01:34,242 INFO L226 Difference]: Without dead ends: 222 [2018-10-24 12:01:34,243 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 217 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2634, Invalid=2916, Unknown=0, NotChecked=0, Total=5550 [2018-10-24 12:01:34,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2018-10-24 12:01:34,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 221. [2018-10-24 12:01:34,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-10-24 12:01:34,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 221 transitions. [2018-10-24 12:01:34,245 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 221 transitions. Word has length 217 [2018-10-24 12:01:34,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:01:34,246 INFO L481 AbstractCegarLoop]: Abstraction has 221 states and 221 transitions. [2018-10-24 12:01:34,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-24 12:01:34,246 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 221 transitions. [2018-10-24 12:01:34,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-10-24 12:01:34,246 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:01:34,247 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 71, 1, 1, 1, 1, 1, 1] [2018-10-24 12:01:34,247 INFO L424 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:01:34,247 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:01:34,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1234486325, now seen corresponding path program 71 times [2018-10-24 12:01:34,247 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:01:34,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:01:34,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:34,248 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:01:34,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:34,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:36,187 INFO L134 CoverageAnalysis]: Checked inductivity of 7597 backedges. 0 proven. 7597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:36,187 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:01:36,187 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:01:36,195 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 12:01:36,378 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-10-24 12:01:36,378 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:01:36,382 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:01:36,475 INFO L134 CoverageAnalysis]: Checked inductivity of 7597 backedges. 0 proven. 7597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:36,495 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:01:36,495 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-24 12:01:36,496 INFO L460 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-24 12:01:36,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-24 12:01:36,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2018-10-24 12:01:36,497 INFO L87 Difference]: Start difference. First operand 221 states and 221 transitions. Second operand 75 states. [2018-10-24 12:01:36,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:01:36,732 INFO L93 Difference]: Finished difference Result 229 states and 229 transitions. [2018-10-24 12:01:36,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-24 12:01:36,732 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 220 [2018-10-24 12:01:36,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:01:36,733 INFO L225 Difference]: With dead ends: 229 [2018-10-24 12:01:36,733 INFO L226 Difference]: Without dead ends: 225 [2018-10-24 12:01:36,734 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 220 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2707, Invalid=2993, Unknown=0, NotChecked=0, Total=5700 [2018-10-24 12:01:36,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2018-10-24 12:01:36,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 224. [2018-10-24 12:01:36,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2018-10-24 12:01:36,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 224 transitions. [2018-10-24 12:01:36,737 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 224 transitions. Word has length 220 [2018-10-24 12:01:36,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:01:36,737 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 224 transitions. [2018-10-24 12:01:36,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-24 12:01:36,738 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 224 transitions. [2018-10-24 12:01:36,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-10-24 12:01:36,738 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:01:36,738 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 72, 1, 1, 1, 1, 1, 1] [2018-10-24 12:01:36,739 INFO L424 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:01:36,739 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:01:36,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1428708048, now seen corresponding path program 72 times [2018-10-24 12:01:36,739 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:01:36,739 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:01:36,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:36,740 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:01:36,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:36,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:39,054 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 7812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:39,054 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:01:39,054 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:01:39,060 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 12:01:39,253 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-10-24 12:01:39,253 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:01:39,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:01:39,346 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 7812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:39,367 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:01:39,367 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-10-24 12:01:39,367 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-24 12:01:39,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-24 12:01:39,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2018-10-24 12:01:39,368 INFO L87 Difference]: Start difference. First operand 224 states and 224 transitions. Second operand 76 states. [2018-10-24 12:01:39,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:01:39,545 INFO L93 Difference]: Finished difference Result 232 states and 232 transitions. [2018-10-24 12:01:39,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-24 12:01:39,545 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 223 [2018-10-24 12:01:39,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:01:39,547 INFO L225 Difference]: With dead ends: 232 [2018-10-24 12:01:39,547 INFO L226 Difference]: Without dead ends: 228 [2018-10-24 12:01:39,548 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 223 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2781, Invalid=3071, Unknown=0, NotChecked=0, Total=5852 [2018-10-24 12:01:39,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2018-10-24 12:01:39,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 227. [2018-10-24 12:01:39,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-10-24 12:01:39,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 227 transitions. [2018-10-24 12:01:39,552 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 227 transitions. Word has length 223 [2018-10-24 12:01:39,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:01:39,552 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 227 transitions. [2018-10-24 12:01:39,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-24 12:01:39,552 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 227 transitions. [2018-10-24 12:01:39,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-10-24 12:01:39,554 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:01:39,554 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 73, 1, 1, 1, 1, 1, 1] [2018-10-24 12:01:39,554 INFO L424 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:01:39,554 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:01:39,554 INFO L82 PathProgramCache]: Analyzing trace with hash 2127857067, now seen corresponding path program 73 times [2018-10-24 12:01:39,554 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:01:39,555 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:01:39,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:39,555 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:01:39,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:39,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:41,664 INFO L134 CoverageAnalysis]: Checked inductivity of 8030 backedges. 0 proven. 8030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:41,664 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:01:41,664 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:01:41,672 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:01:41,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:41,788 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:01:41,868 INFO L134 CoverageAnalysis]: Checked inductivity of 8030 backedges. 0 proven. 8030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:41,888 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:01:41,888 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-10-24 12:01:41,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-24 12:01:41,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-24 12:01:41,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2018-10-24 12:01:41,890 INFO L87 Difference]: Start difference. First operand 227 states and 227 transitions. Second operand 77 states. [2018-10-24 12:01:42,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:01:42,155 INFO L93 Difference]: Finished difference Result 235 states and 235 transitions. [2018-10-24 12:01:42,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-24 12:01:42,155 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 226 [2018-10-24 12:01:42,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:01:42,156 INFO L225 Difference]: With dead ends: 235 [2018-10-24 12:01:42,156 INFO L226 Difference]: Without dead ends: 231 [2018-10-24 12:01:42,156 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 226 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2856, Invalid=3150, Unknown=0, NotChecked=0, Total=6006 [2018-10-24 12:01:42,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-10-24 12:01:42,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 230. [2018-10-24 12:01:42,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2018-10-24 12:01:42,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 230 transitions. [2018-10-24 12:01:42,160 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 230 transitions. Word has length 226 [2018-10-24 12:01:42,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:01:42,160 INFO L481 AbstractCegarLoop]: Abstraction has 230 states and 230 transitions. [2018-10-24 12:01:42,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-24 12:01:42,161 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 230 transitions. [2018-10-24 12:01:42,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2018-10-24 12:01:42,162 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:01:42,162 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 74, 1, 1, 1, 1, 1, 1] [2018-10-24 12:01:42,162 INFO L424 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:01:42,162 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:01:42,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1083994288, now seen corresponding path program 74 times [2018-10-24 12:01:42,163 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:01:42,163 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:01:42,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:42,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:01:42,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:42,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:44,607 INFO L134 CoverageAnalysis]: Checked inductivity of 8251 backedges. 0 proven. 8251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:44,607 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:01:44,607 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:01:44,614 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 12:01:44,741 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 12:01:44,741 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:01:44,745 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:01:44,856 INFO L134 CoverageAnalysis]: Checked inductivity of 8251 backedges. 0 proven. 8251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:44,876 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:01:44,877 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-10-24 12:01:44,877 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-24 12:01:44,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-24 12:01:44,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2018-10-24 12:01:44,878 INFO L87 Difference]: Start difference. First operand 230 states and 230 transitions. Second operand 78 states. [2018-10-24 12:01:45,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:01:45,109 INFO L93 Difference]: Finished difference Result 238 states and 238 transitions. [2018-10-24 12:01:45,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-24 12:01:45,109 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 229 [2018-10-24 12:01:45,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:01:45,110 INFO L225 Difference]: With dead ends: 238 [2018-10-24 12:01:45,110 INFO L226 Difference]: Without dead ends: 234 [2018-10-24 12:01:45,111 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 229 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2932, Invalid=3230, Unknown=0, NotChecked=0, Total=6162 [2018-10-24 12:01:45,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2018-10-24 12:01:45,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 233. [2018-10-24 12:01:45,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2018-10-24 12:01:45,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 233 transitions. [2018-10-24 12:01:45,114 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 233 transitions. Word has length 229 [2018-10-24 12:01:45,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:01:45,115 INFO L481 AbstractCegarLoop]: Abstraction has 233 states and 233 transitions. [2018-10-24 12:01:45,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-24 12:01:45,115 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 233 transitions. [2018-10-24 12:01:45,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-10-24 12:01:45,116 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:01:45,116 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 75, 1, 1, 1, 1, 1, 1] [2018-10-24 12:01:45,116 INFO L424 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:01:45,116 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:01:45,117 INFO L82 PathProgramCache]: Analyzing trace with hash -2066290805, now seen corresponding path program 75 times [2018-10-24 12:01:45,117 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:01:45,117 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:01:45,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:45,117 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:01:45,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:45,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:47,518 INFO L134 CoverageAnalysis]: Checked inductivity of 8475 backedges. 0 proven. 8475 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:47,518 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:01:47,518 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:01:47,525 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 12:01:47,725 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-10-24 12:01:47,725 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:01:47,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:01:47,821 INFO L134 CoverageAnalysis]: Checked inductivity of 8475 backedges. 0 proven. 8475 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:47,841 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:01:47,842 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-10-24 12:01:47,842 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-24 12:01:47,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-24 12:01:47,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2018-10-24 12:01:47,843 INFO L87 Difference]: Start difference. First operand 233 states and 233 transitions. Second operand 79 states. [2018-10-24 12:01:48,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:01:48,937 INFO L93 Difference]: Finished difference Result 241 states and 241 transitions. [2018-10-24 12:01:48,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-24 12:01:48,938 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 232 [2018-10-24 12:01:48,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:01:48,939 INFO L225 Difference]: With dead ends: 241 [2018-10-24 12:01:48,939 INFO L226 Difference]: Without dead ends: 237 [2018-10-24 12:01:48,939 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 232 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3009, Invalid=3311, Unknown=0, NotChecked=0, Total=6320 [2018-10-24 12:01:48,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2018-10-24 12:01:48,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 236. [2018-10-24 12:01:48,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2018-10-24 12:01:48,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 236 transitions. [2018-10-24 12:01:48,943 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 236 transitions. Word has length 232 [2018-10-24 12:01:48,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:01:48,943 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 236 transitions. [2018-10-24 12:01:48,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-24 12:01:48,943 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 236 transitions. [2018-10-24 12:01:48,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2018-10-24 12:01:48,944 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:01:48,944 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 76, 1, 1, 1, 1, 1, 1] [2018-10-24 12:01:48,944 INFO L424 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:01:48,944 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:01:48,945 INFO L82 PathProgramCache]: Analyzing trace with hash 245326192, now seen corresponding path program 76 times [2018-10-24 12:01:48,945 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:01:48,945 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:01:48,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:48,945 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:01:48,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:49,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:51,173 INFO L134 CoverageAnalysis]: Checked inductivity of 8702 backedges. 0 proven. 8702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:51,174 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:01:51,174 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:01:51,181 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 12:01:51,299 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 12:01:51,299 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:01:51,304 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:01:51,400 INFO L134 CoverageAnalysis]: Checked inductivity of 8702 backedges. 0 proven. 8702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:51,420 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:01:51,421 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-10-24 12:01:51,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-24 12:01:51,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-24 12:01:51,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2018-10-24 12:01:51,422 INFO L87 Difference]: Start difference. First operand 236 states and 236 transitions. Second operand 80 states. [2018-10-24 12:01:51,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:01:51,605 INFO L93 Difference]: Finished difference Result 244 states and 244 transitions. [2018-10-24 12:01:51,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-24 12:01:51,605 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 235 [2018-10-24 12:01:51,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:01:51,606 INFO L225 Difference]: With dead ends: 244 [2018-10-24 12:01:51,606 INFO L226 Difference]: Without dead ends: 240 [2018-10-24 12:01:51,607 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 235 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3087, Invalid=3393, Unknown=0, NotChecked=0, Total=6480 [2018-10-24 12:01:51,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2018-10-24 12:01:51,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 239. [2018-10-24 12:01:51,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2018-10-24 12:01:51,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 239 transitions. [2018-10-24 12:01:51,610 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 239 transitions. Word has length 235 [2018-10-24 12:01:51,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:01:51,610 INFO L481 AbstractCegarLoop]: Abstraction has 239 states and 239 transitions. [2018-10-24 12:01:51,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-24 12:01:51,610 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 239 transitions. [2018-10-24 12:01:51,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-10-24 12:01:51,611 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:01:51,612 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 77, 1, 1, 1, 1, 1, 1] [2018-10-24 12:01:51,612 INFO L424 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:01:51,612 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:01:51,612 INFO L82 PathProgramCache]: Analyzing trace with hash 121659755, now seen corresponding path program 77 times [2018-10-24 12:01:51,612 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:01:51,612 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:01:51,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:51,613 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:01:51,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:51,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:54,249 INFO L134 CoverageAnalysis]: Checked inductivity of 8932 backedges. 0 proven. 8932 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:54,249 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:01:54,249 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:01:54,257 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 12:01:54,457 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-10-24 12:01:54,457 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:01:54,461 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:01:54,558 INFO L134 CoverageAnalysis]: Checked inductivity of 8932 backedges. 0 proven. 8932 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:54,578 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:01:54,579 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-10-24 12:01:54,579 INFO L460 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-24 12:01:54,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-24 12:01:54,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2018-10-24 12:01:54,580 INFO L87 Difference]: Start difference. First operand 239 states and 239 transitions. Second operand 81 states. [2018-10-24 12:01:54,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:01:54,800 INFO L93 Difference]: Finished difference Result 247 states and 247 transitions. [2018-10-24 12:01:54,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-24 12:01:54,800 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 238 [2018-10-24 12:01:54,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:01:54,801 INFO L225 Difference]: With dead ends: 247 [2018-10-24 12:01:54,801 INFO L226 Difference]: Without dead ends: 243 [2018-10-24 12:01:54,802 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3166, Invalid=3476, Unknown=0, NotChecked=0, Total=6642 [2018-10-24 12:01:54,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-10-24 12:01:54,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 242. [2018-10-24 12:01:54,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2018-10-24 12:01:54,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 242 transitions. [2018-10-24 12:01:54,806 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 242 transitions. Word has length 238 [2018-10-24 12:01:54,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:01:54,806 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 242 transitions. [2018-10-24 12:01:54,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-24 12:01:54,806 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 242 transitions. [2018-10-24 12:01:54,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2018-10-24 12:01:54,807 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:01:54,807 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 78, 1, 1, 1, 1, 1, 1] [2018-10-24 12:01:54,808 INFO L424 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:01:54,808 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:01:54,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1056775056, now seen corresponding path program 78 times [2018-10-24 12:01:54,808 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:01:54,808 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:01:54,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:54,809 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:01:54,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:54,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:57,147 INFO L134 CoverageAnalysis]: Checked inductivity of 9165 backedges. 0 proven. 9165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:57,148 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:01:57,148 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:01:57,155 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 12:01:57,362 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-10-24 12:01:57,362 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:01:57,367 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:01:57,471 INFO L134 CoverageAnalysis]: Checked inductivity of 9165 backedges. 0 proven. 9165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:57,492 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:01:57,493 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-10-24 12:01:57,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-24 12:01:57,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-24 12:01:57,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2018-10-24 12:01:57,494 INFO L87 Difference]: Start difference. First operand 242 states and 242 transitions. Second operand 82 states. [2018-10-24 12:01:57,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:01:57,809 INFO L93 Difference]: Finished difference Result 250 states and 250 transitions. [2018-10-24 12:01:57,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-24 12:01:57,810 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 241 [2018-10-24 12:01:57,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:01:57,810 INFO L225 Difference]: With dead ends: 250 [2018-10-24 12:01:57,811 INFO L226 Difference]: Without dead ends: 246 [2018-10-24 12:01:57,811 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 241 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3246, Invalid=3560, Unknown=0, NotChecked=0, Total=6806 [2018-10-24 12:01:57,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2018-10-24 12:01:57,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 245. [2018-10-24 12:01:57,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2018-10-24 12:01:57,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 245 transitions. [2018-10-24 12:01:57,814 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 245 transitions. Word has length 241 [2018-10-24 12:01:57,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:01:57,814 INFO L481 AbstractCegarLoop]: Abstraction has 245 states and 245 transitions. [2018-10-24 12:01:57,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-24 12:01:57,814 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 245 transitions. [2018-10-24 12:01:57,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2018-10-24 12:01:57,815 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:01:57,815 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 79, 1, 1, 1, 1, 1, 1] [2018-10-24 12:01:57,815 INFO L424 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:01:57,815 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:01:57,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1918825291, now seen corresponding path program 79 times [2018-10-24 12:01:57,815 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:01:57,816 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:01:57,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:57,816 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:01:57,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:57,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:02:00,448 INFO L134 CoverageAnalysis]: Checked inductivity of 9401 backedges. 0 proven. 9401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:00,449 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:02:00,449 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:02:00,455 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:02:00,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:02:00,582 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:02:00,682 INFO L134 CoverageAnalysis]: Checked inductivity of 9401 backedges. 0 proven. 9401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:00,703 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:02:00,703 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-10-24 12:02:00,703 INFO L460 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-24 12:02:00,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-24 12:02:00,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2018-10-24 12:02:00,704 INFO L87 Difference]: Start difference. First operand 245 states and 245 transitions. Second operand 83 states. [2018-10-24 12:02:00,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:02:00,949 INFO L93 Difference]: Finished difference Result 253 states and 253 transitions. [2018-10-24 12:02:00,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-24 12:02:00,949 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 244 [2018-10-24 12:02:00,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:02:00,951 INFO L225 Difference]: With dead ends: 253 [2018-10-24 12:02:00,951 INFO L226 Difference]: Without dead ends: 249 [2018-10-24 12:02:00,952 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 244 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3327, Invalid=3645, Unknown=0, NotChecked=0, Total=6972 [2018-10-24 12:02:00,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2018-10-24 12:02:00,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 248. [2018-10-24 12:02:00,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2018-10-24 12:02:00,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 248 transitions. [2018-10-24 12:02:00,957 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 248 transitions. Word has length 244 [2018-10-24 12:02:00,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:02:00,958 INFO L481 AbstractCegarLoop]: Abstraction has 248 states and 248 transitions. [2018-10-24 12:02:00,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-24 12:02:00,958 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 248 transitions. [2018-10-24 12:02:00,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2018-10-24 12:02:00,959 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:02:00,959 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 80, 1, 1, 1, 1, 1, 1] [2018-10-24 12:02:00,959 INFO L424 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:02:00,960 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:02:00,960 INFO L82 PathProgramCache]: Analyzing trace with hash -647053904, now seen corresponding path program 80 times [2018-10-24 12:02:00,960 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:02:00,960 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:02:00,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:02:00,961 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:02:00,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:02:01,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:02:03,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9640 backedges. 0 proven. 9640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:03,602 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:02:03,602 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:02:03,608 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 12:02:03,732 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 12:02:03,732 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:02:03,736 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:02:03,905 INFO L134 CoverageAnalysis]: Checked inductivity of 9640 backedges. 0 proven. 9640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:03,926 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:02:03,926 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-10-24 12:02:03,926 INFO L460 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-24 12:02:03,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-24 12:02:03,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2018-10-24 12:02:03,928 INFO L87 Difference]: Start difference. First operand 248 states and 248 transitions. Second operand 84 states. [2018-10-24 12:02:04,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:02:04,324 INFO L93 Difference]: Finished difference Result 256 states and 256 transitions. [2018-10-24 12:02:04,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-24 12:02:04,325 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 247 [2018-10-24 12:02:04,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:02:04,326 INFO L225 Difference]: With dead ends: 256 [2018-10-24 12:02:04,326 INFO L226 Difference]: Without dead ends: 252 [2018-10-24 12:02:04,326 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 247 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3409, Invalid=3731, Unknown=0, NotChecked=0, Total=7140 [2018-10-24 12:02:04,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2018-10-24 12:02:04,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 251. [2018-10-24 12:02:04,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2018-10-24 12:02:04,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 251 transitions. [2018-10-24 12:02:04,329 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 251 transitions. Word has length 247 [2018-10-24 12:02:04,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:02:04,329 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 251 transitions. [2018-10-24 12:02:04,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-24 12:02:04,329 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 251 transitions. [2018-10-24 12:02:04,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2018-10-24 12:02:04,330 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:02:04,330 INFO L375 BasicCegarLoop]: trace histogram [82, 81, 81, 1, 1, 1, 1, 1, 1] [2018-10-24 12:02:04,330 INFO L424 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:02:04,331 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:02:04,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1073782059, now seen corresponding path program 81 times [2018-10-24 12:02:04,331 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:02:04,331 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:02:04,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:02:04,332 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:02:04,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:02:04,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:02:06,840 INFO L134 CoverageAnalysis]: Checked inductivity of 9882 backedges. 0 proven. 9882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:06,840 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:02:06,840 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:02:06,848 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 12:02:07,077 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2018-10-24 12:02:07,077 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:02:07,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:02:07,185 INFO L134 CoverageAnalysis]: Checked inductivity of 9882 backedges. 0 proven. 9882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:07,205 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:02:07,206 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-10-24 12:02:07,206 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-24 12:02:07,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-24 12:02:07,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2018-10-24 12:02:07,207 INFO L87 Difference]: Start difference. First operand 251 states and 251 transitions. Second operand 85 states. [2018-10-24 12:02:07,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:02:07,433 INFO L93 Difference]: Finished difference Result 259 states and 259 transitions. [2018-10-24 12:02:07,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-24 12:02:07,434 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 250 [2018-10-24 12:02:07,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:02:07,435 INFO L225 Difference]: With dead ends: 259 [2018-10-24 12:02:07,435 INFO L226 Difference]: Without dead ends: 255 [2018-10-24 12:02:07,435 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 250 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3492, Invalid=3818, Unknown=0, NotChecked=0, Total=7310 [2018-10-24 12:02:07,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-10-24 12:02:07,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 254. [2018-10-24 12:02:07,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2018-10-24 12:02:07,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 254 transitions. [2018-10-24 12:02:07,438 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 254 transitions. Word has length 250 [2018-10-24 12:02:07,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:02:07,438 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 254 transitions. [2018-10-24 12:02:07,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-24 12:02:07,438 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 254 transitions. [2018-10-24 12:02:07,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2018-10-24 12:02:07,440 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:02:07,440 INFO L375 BasicCegarLoop]: trace histogram [83, 82, 82, 1, 1, 1, 1, 1, 1] [2018-10-24 12:02:07,440 INFO L424 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:02:07,440 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:02:07,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1768310736, now seen corresponding path program 82 times [2018-10-24 12:02:07,440 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:02:07,441 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:02:07,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:02:07,441 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:02:07,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:02:07,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:02:10,361 INFO L134 CoverageAnalysis]: Checked inductivity of 10127 backedges. 0 proven. 10127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:10,361 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:02:10,362 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:02:10,369 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 12:02:10,495 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 12:02:10,495 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:02:10,500 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:02:10,604 INFO L134 CoverageAnalysis]: Checked inductivity of 10127 backedges. 0 proven. 10127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:10,624 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:02:10,624 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-10-24 12:02:10,624 INFO L460 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-24 12:02:10,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-24 12:02:10,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2018-10-24 12:02:10,625 INFO L87 Difference]: Start difference. First operand 254 states and 254 transitions. Second operand 86 states. [2018-10-24 12:02:10,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:02:10,866 INFO L93 Difference]: Finished difference Result 262 states and 262 transitions. [2018-10-24 12:02:10,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-24 12:02:10,867 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 253 [2018-10-24 12:02:10,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:02:10,868 INFO L225 Difference]: With dead ends: 262 [2018-10-24 12:02:10,868 INFO L226 Difference]: Without dead ends: 258 [2018-10-24 12:02:10,869 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 253 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3576, Invalid=3906, Unknown=0, NotChecked=0, Total=7482 [2018-10-24 12:02:10,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2018-10-24 12:02:10,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 257. [2018-10-24 12:02:10,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2018-10-24 12:02:10,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 257 transitions. [2018-10-24 12:02:10,872 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 257 transitions. Word has length 253 [2018-10-24 12:02:10,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:02:10,872 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 257 transitions. [2018-10-24 12:02:10,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-24 12:02:10,873 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 257 transitions. [2018-10-24 12:02:10,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2018-10-24 12:02:10,873 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:02:10,874 INFO L375 BasicCegarLoop]: trace histogram [84, 83, 83, 1, 1, 1, 1, 1, 1] [2018-10-24 12:02:10,874 INFO L424 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:02:10,874 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:02:10,874 INFO L82 PathProgramCache]: Analyzing trace with hash -680304885, now seen corresponding path program 83 times [2018-10-24 12:02:10,874 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:02:10,874 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:02:10,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:02:10,875 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:02:10,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:02:10,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:02:13,548 INFO L134 CoverageAnalysis]: Checked inductivity of 10375 backedges. 0 proven. 10375 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:13,548 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:02:13,548 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:02:13,556 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 12:02:13,780 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2018-10-24 12:02:13,780 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:02:13,785 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:02:13,892 INFO L134 CoverageAnalysis]: Checked inductivity of 10375 backedges. 0 proven. 10375 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:13,912 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:02:13,913 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-10-24 12:02:13,913 INFO L460 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-10-24 12:02:13,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-10-24 12:02:13,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2018-10-24 12:02:13,914 INFO L87 Difference]: Start difference. First operand 257 states and 257 transitions. Second operand 87 states. [2018-10-24 12:02:14,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:02:14,385 INFO L93 Difference]: Finished difference Result 265 states and 265 transitions. [2018-10-24 12:02:14,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-24 12:02:14,386 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 256 [2018-10-24 12:02:14,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:02:14,387 INFO L225 Difference]: With dead ends: 265 [2018-10-24 12:02:14,387 INFO L226 Difference]: Without dead ends: 261 [2018-10-24 12:02:14,388 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 256 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3661, Invalid=3995, Unknown=0, NotChecked=0, Total=7656 [2018-10-24 12:02:14,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2018-10-24 12:02:14,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 260. [2018-10-24 12:02:14,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2018-10-24 12:02:14,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 260 transitions. [2018-10-24 12:02:14,392 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 260 transitions. Word has length 256 [2018-10-24 12:02:14,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:02:14,393 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 260 transitions. [2018-10-24 12:02:14,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-10-24 12:02:14,393 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 260 transitions. [2018-10-24 12:02:14,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2018-10-24 12:02:14,394 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:02:14,394 INFO L375 BasicCegarLoop]: trace histogram [85, 84, 84, 1, 1, 1, 1, 1, 1] [2018-10-24 12:02:14,394 INFO L424 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:02:14,394 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:02:14,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1663714832, now seen corresponding path program 84 times [2018-10-24 12:02:14,395 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:02:14,395 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:02:14,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:02:14,396 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:02:14,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:02:14,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:02:17,071 INFO L134 CoverageAnalysis]: Checked inductivity of 10626 backedges. 0 proven. 10626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:17,072 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:02:17,072 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:02:17,079 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 12:02:17,313 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-10-24 12:02:17,313 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:02:17,319 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:02:17,430 INFO L134 CoverageAnalysis]: Checked inductivity of 10626 backedges. 0 proven. 10626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:17,452 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:02:17,452 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-10-24 12:02:17,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-24 12:02:17,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-24 12:02:17,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2018-10-24 12:02:17,454 INFO L87 Difference]: Start difference. First operand 260 states and 260 transitions. Second operand 88 states. [2018-10-24 12:02:17,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:02:17,663 INFO L93 Difference]: Finished difference Result 268 states and 268 transitions. [2018-10-24 12:02:17,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-24 12:02:17,664 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 259 [2018-10-24 12:02:17,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:02:17,666 INFO L225 Difference]: With dead ends: 268 [2018-10-24 12:02:17,666 INFO L226 Difference]: Without dead ends: 264 [2018-10-24 12:02:17,666 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 259 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3747, Invalid=4085, Unknown=0, NotChecked=0, Total=7832 [2018-10-24 12:02:17,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2018-10-24 12:02:17,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 263. [2018-10-24 12:02:17,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2018-10-24 12:02:17,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 263 transitions. [2018-10-24 12:02:17,670 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 263 transitions. Word has length 259 [2018-10-24 12:02:17,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:02:17,671 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 263 transitions. [2018-10-24 12:02:17,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-24 12:02:17,671 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 263 transitions. [2018-10-24 12:02:17,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-10-24 12:02:17,672 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:02:17,672 INFO L375 BasicCegarLoop]: trace histogram [86, 85, 85, 1, 1, 1, 1, 1, 1] [2018-10-24 12:02:17,672 INFO L424 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:02:17,672 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:02:17,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1837447403, now seen corresponding path program 85 times [2018-10-24 12:02:17,673 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:02:17,673 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:02:17,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:02:17,673 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:02:17,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:02:17,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:02:20,686 INFO L134 CoverageAnalysis]: Checked inductivity of 10880 backedges. 0 proven. 10880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:20,686 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:02:20,686 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:02:20,694 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:02:20,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:02:20,836 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:02:20,950 INFO L134 CoverageAnalysis]: Checked inductivity of 10880 backedges. 0 proven. 10880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:20,970 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:02:20,970 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-10-24 12:02:20,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-24 12:02:20,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-24 12:02:20,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2018-10-24 12:02:20,972 INFO L87 Difference]: Start difference. First operand 263 states and 263 transitions. Second operand 89 states. [2018-10-24 12:02:21,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:02:21,261 INFO L93 Difference]: Finished difference Result 271 states and 271 transitions. [2018-10-24 12:02:21,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-24 12:02:21,261 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 262 [2018-10-24 12:02:21,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:02:21,262 INFO L225 Difference]: With dead ends: 271 [2018-10-24 12:02:21,262 INFO L226 Difference]: Without dead ends: 267 [2018-10-24 12:02:21,263 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 262 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3834, Invalid=4176, Unknown=0, NotChecked=0, Total=8010 [2018-10-24 12:02:21,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-10-24 12:02:21,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 266. [2018-10-24 12:02:21,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2018-10-24 12:02:21,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 266 transitions. [2018-10-24 12:02:21,266 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 266 transitions. Word has length 262 [2018-10-24 12:02:21,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:02:21,266 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 266 transitions. [2018-10-24 12:02:21,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-24 12:02:21,267 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 266 transitions. [2018-10-24 12:02:21,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2018-10-24 12:02:21,268 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:02:21,268 INFO L375 BasicCegarLoop]: trace histogram [87, 86, 86, 1, 1, 1, 1, 1, 1] [2018-10-24 12:02:21,268 INFO L424 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:02:21,268 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:02:21,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1680806928, now seen corresponding path program 86 times [2018-10-24 12:02:21,268 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:02:21,269 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:02:21,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:02:21,269 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:02:21,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:02:21,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:02:24,056 INFO L134 CoverageAnalysis]: Checked inductivity of 11137 backedges. 0 proven. 11137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:24,056 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:02:24,056 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:02:24,065 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 12:02:24,197 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 12:02:24,197 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:02:24,202 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:02:24,316 INFO L134 CoverageAnalysis]: Checked inductivity of 11137 backedges. 0 proven. 11137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:24,342 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:02:24,343 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-10-24 12:02:24,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-24 12:02:24,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-24 12:02:24,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2018-10-24 12:02:24,344 INFO L87 Difference]: Start difference. First operand 266 states and 266 transitions. Second operand 90 states. [2018-10-24 12:02:24,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:02:24,697 INFO L93 Difference]: Finished difference Result 274 states and 274 transitions. [2018-10-24 12:02:24,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-24 12:02:24,697 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 265 [2018-10-24 12:02:24,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:02:24,698 INFO L225 Difference]: With dead ends: 274 [2018-10-24 12:02:24,699 INFO L226 Difference]: Without dead ends: 270 [2018-10-24 12:02:24,699 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 265 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3922, Invalid=4268, Unknown=0, NotChecked=0, Total=8190 [2018-10-24 12:02:24,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2018-10-24 12:02:24,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 269. [2018-10-24 12:02:24,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2018-10-24 12:02:24,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 269 transitions. [2018-10-24 12:02:24,703 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 269 transitions. Word has length 265 [2018-10-24 12:02:24,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:02:24,703 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 269 transitions. [2018-10-24 12:02:24,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-24 12:02:24,703 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 269 transitions. [2018-10-24 12:02:24,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2018-10-24 12:02:24,704 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:02:24,704 INFO L375 BasicCegarLoop]: trace histogram [88, 87, 87, 1, 1, 1, 1, 1, 1] [2018-10-24 12:02:24,704 INFO L424 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:02:24,704 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:02:24,704 INFO L82 PathProgramCache]: Analyzing trace with hash -461100341, now seen corresponding path program 87 times [2018-10-24 12:02:24,704 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:02:24,705 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:02:24,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:02:24,705 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:02:24,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:02:24,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:02:27,566 INFO L134 CoverageAnalysis]: Checked inductivity of 11397 backedges. 0 proven. 11397 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:27,567 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:02:27,567 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:02:27,573 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 12:02:27,828 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2018-10-24 12:02:27,828 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:02:27,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:02:27,948 INFO L134 CoverageAnalysis]: Checked inductivity of 11397 backedges. 0 proven. 11397 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:27,969 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:02:27,969 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-10-24 12:02:27,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-24 12:02:27,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-24 12:02:27,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2018-10-24 12:02:27,971 INFO L87 Difference]: Start difference. First operand 269 states and 269 transitions. Second operand 91 states. [2018-10-24 12:02:28,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:02:28,215 INFO L93 Difference]: Finished difference Result 277 states and 277 transitions. [2018-10-24 12:02:28,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-24 12:02:28,215 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 268 [2018-10-24 12:02:28,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:02:28,216 INFO L225 Difference]: With dead ends: 277 [2018-10-24 12:02:28,216 INFO L226 Difference]: Without dead ends: 273 [2018-10-24 12:02:28,217 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 268 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4011, Invalid=4361, Unknown=0, NotChecked=0, Total=8372 [2018-10-24 12:02:28,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2018-10-24 12:02:28,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 272. [2018-10-24 12:02:28,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2018-10-24 12:02:28,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 272 transitions. [2018-10-24 12:02:28,221 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 272 transitions. Word has length 268 [2018-10-24 12:02:28,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:02:28,221 INFO L481 AbstractCegarLoop]: Abstraction has 272 states and 272 transitions. [2018-10-24 12:02:28,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-24 12:02:28,221 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 272 transitions. [2018-10-24 12:02:28,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2018-10-24 12:02:28,222 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:02:28,222 INFO L375 BasicCegarLoop]: trace histogram [89, 88, 88, 1, 1, 1, 1, 1, 1] [2018-10-24 12:02:28,222 INFO L424 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:02:28,223 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:02:28,223 INFO L82 PathProgramCache]: Analyzing trace with hash 308565552, now seen corresponding path program 88 times [2018-10-24 12:02:28,223 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:02:28,223 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:02:28,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:02:28,223 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:02:28,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:02:28,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:02:31,173 INFO L134 CoverageAnalysis]: Checked inductivity of 11660 backedges. 0 proven. 11660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:31,173 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:02:31,173 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:02:31,198 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 12:02:31,341 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 12:02:31,341 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:02:31,347 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:02:31,454 INFO L134 CoverageAnalysis]: Checked inductivity of 11660 backedges. 0 proven. 11660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:31,476 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:02:31,476 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-10-24 12:02:31,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-24 12:02:31,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-24 12:02:31,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2018-10-24 12:02:31,478 INFO L87 Difference]: Start difference. First operand 272 states and 272 transitions. Second operand 92 states. [2018-10-24 12:02:31,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:02:31,785 INFO L93 Difference]: Finished difference Result 280 states and 280 transitions. [2018-10-24 12:02:31,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-24 12:02:31,785 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 271 [2018-10-24 12:02:31,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:02:31,787 INFO L225 Difference]: With dead ends: 280 [2018-10-24 12:02:31,787 INFO L226 Difference]: Without dead ends: 276 [2018-10-24 12:02:31,788 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 271 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4101, Invalid=4455, Unknown=0, NotChecked=0, Total=8556 [2018-10-24 12:02:31,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2018-10-24 12:02:31,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 275. [2018-10-24 12:02:31,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2018-10-24 12:02:31,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 275 transitions. [2018-10-24 12:02:31,791 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 275 transitions. Word has length 271 [2018-10-24 12:02:31,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:02:31,792 INFO L481 AbstractCegarLoop]: Abstraction has 275 states and 275 transitions. [2018-10-24 12:02:31,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-24 12:02:31,792 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 275 transitions. [2018-10-24 12:02:31,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2018-10-24 12:02:31,793 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:02:31,793 INFO L375 BasicCegarLoop]: trace histogram [90, 89, 89, 1, 1, 1, 1, 1, 1] [2018-10-24 12:02:31,793 INFO L424 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:02:31,793 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:02:31,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1405209429, now seen corresponding path program 89 times [2018-10-24 12:02:31,793 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:02:31,794 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:02:31,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:02:31,794 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:02:31,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:02:31,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:02:35,512 INFO L134 CoverageAnalysis]: Checked inductivity of 11926 backedges. 0 proven. 11926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:35,512 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:02:35,512 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:02:35,520 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 12:02:35,894 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2018-10-24 12:02:35,895 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:02:35,900 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:02:36,015 INFO L134 CoverageAnalysis]: Checked inductivity of 11926 backedges. 0 proven. 11926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:36,036 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:02:36,037 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-10-24 12:02:36,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-10-24 12:02:36,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-10-24 12:02:36,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2018-10-24 12:02:36,038 INFO L87 Difference]: Start difference. First operand 275 states and 275 transitions. Second operand 93 states. [2018-10-24 12:02:36,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:02:36,431 INFO L93 Difference]: Finished difference Result 283 states and 283 transitions. [2018-10-24 12:02:36,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-24 12:02:36,431 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 274 [2018-10-24 12:02:36,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:02:36,432 INFO L225 Difference]: With dead ends: 283 [2018-10-24 12:02:36,432 INFO L226 Difference]: Without dead ends: 279 [2018-10-24 12:02:36,433 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 274 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4192, Invalid=4550, Unknown=0, NotChecked=0, Total=8742 [2018-10-24 12:02:36,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2018-10-24 12:02:36,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 278. [2018-10-24 12:02:36,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2018-10-24 12:02:36,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 278 transitions. [2018-10-24 12:02:36,436 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 278 transitions. Word has length 274 [2018-10-24 12:02:36,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:02:36,436 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 278 transitions. [2018-10-24 12:02:36,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-10-24 12:02:36,437 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 278 transitions. [2018-10-24 12:02:36,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2018-10-24 12:02:36,437 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:02:36,438 INFO L375 BasicCegarLoop]: trace histogram [91, 90, 90, 1, 1, 1, 1, 1, 1] [2018-10-24 12:02:36,438 INFO L424 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:02:36,438 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:02:36,438 INFO L82 PathProgramCache]: Analyzing trace with hash 2095546448, now seen corresponding path program 90 times [2018-10-24 12:02:36,438 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:02:36,438 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:02:36,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:02:36,439 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:02:36,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:02:36,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:02:39,483 INFO L134 CoverageAnalysis]: Checked inductivity of 12195 backedges. 0 proven. 12195 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:39,483 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:02:39,483 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:02:39,491 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 12:02:39,749 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2018-10-24 12:02:39,749 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:02:39,754 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:02:39,872 INFO L134 CoverageAnalysis]: Checked inductivity of 12195 backedges. 0 proven. 12195 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:39,893 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:02:39,893 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-10-24 12:02:39,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-24 12:02:39,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-24 12:02:39,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2018-10-24 12:02:39,894 INFO L87 Difference]: Start difference. First operand 278 states and 278 transitions. Second operand 94 states. [2018-10-24 12:02:40,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:02:40,271 INFO L93 Difference]: Finished difference Result 286 states and 286 transitions. [2018-10-24 12:02:40,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-10-24 12:02:40,271 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 277 [2018-10-24 12:02:40,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:02:40,272 INFO L225 Difference]: With dead ends: 286 [2018-10-24 12:02:40,272 INFO L226 Difference]: Without dead ends: 282 [2018-10-24 12:02:40,273 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 277 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4284, Invalid=4646, Unknown=0, NotChecked=0, Total=8930 [2018-10-24 12:02:40,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2018-10-24 12:02:40,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 281. [2018-10-24 12:02:40,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2018-10-24 12:02:40,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 281 transitions. [2018-10-24 12:02:40,276 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 281 transitions. Word has length 277 [2018-10-24 12:02:40,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:02:40,276 INFO L481 AbstractCegarLoop]: Abstraction has 281 states and 281 transitions. [2018-10-24 12:02:40,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-24 12:02:40,276 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 281 transitions. [2018-10-24 12:02:40,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2018-10-24 12:02:40,277 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:02:40,277 INFO L375 BasicCegarLoop]: trace histogram [92, 91, 91, 1, 1, 1, 1, 1, 1] [2018-10-24 12:02:40,277 INFO L424 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:02:40,277 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:02:40,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1576970613, now seen corresponding path program 91 times [2018-10-24 12:02:40,278 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:02:40,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:02:40,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:02:40,278 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:02:40,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:02:40,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:02:43,379 INFO L134 CoverageAnalysis]: Checked inductivity of 12467 backedges. 0 proven. 12467 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:43,380 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:02:43,380 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:02:43,387 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:02:43,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:02:43,532 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:02:43,654 INFO L134 CoverageAnalysis]: Checked inductivity of 12467 backedges. 0 proven. 12467 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:43,675 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:02:43,675 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-10-24 12:02:43,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-10-24 12:02:43,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-10-24 12:02:43,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2018-10-24 12:02:43,677 INFO L87 Difference]: Start difference. First operand 281 states and 281 transitions. Second operand 95 states. [2018-10-24 12:02:44,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:02:44,068 INFO L93 Difference]: Finished difference Result 289 states and 289 transitions. [2018-10-24 12:02:44,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-24 12:02:44,068 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 280 [2018-10-24 12:02:44,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:02:44,069 INFO L225 Difference]: With dead ends: 289 [2018-10-24 12:02:44,069 INFO L226 Difference]: Without dead ends: 285 [2018-10-24 12:02:44,070 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 280 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4377, Invalid=4743, Unknown=0, NotChecked=0, Total=9120 [2018-10-24 12:02:44,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2018-10-24 12:02:44,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 284. [2018-10-24 12:02:44,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2018-10-24 12:02:44,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 284 transitions. [2018-10-24 12:02:44,073 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 284 transitions. Word has length 280 [2018-10-24 12:02:44,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:02:44,073 INFO L481 AbstractCegarLoop]: Abstraction has 284 states and 284 transitions. [2018-10-24 12:02:44,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-10-24 12:02:44,073 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 284 transitions. [2018-10-24 12:02:44,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2018-10-24 12:02:44,074 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:02:44,074 INFO L375 BasicCegarLoop]: trace histogram [93, 92, 92, 1, 1, 1, 1, 1, 1] [2018-10-24 12:02:44,074 INFO L424 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:02:44,074 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:02:44,074 INFO L82 PathProgramCache]: Analyzing trace with hash 464163440, now seen corresponding path program 92 times [2018-10-24 12:02:44,075 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:02:44,075 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:02:44,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:02:44,075 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:02:44,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:02:44,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:02:47,290 INFO L134 CoverageAnalysis]: Checked inductivity of 12742 backedges. 0 proven. 12742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:47,291 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:02:47,291 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:02:47,298 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 12:02:47,448 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 12:02:47,448 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:02:47,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:02:47,626 INFO L134 CoverageAnalysis]: Checked inductivity of 12742 backedges. 0 proven. 12742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:47,648 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:02:47,648 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-10-24 12:02:47,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-24 12:02:47,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-24 12:02:47,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2018-10-24 12:02:47,650 INFO L87 Difference]: Start difference. First operand 284 states and 284 transitions. Second operand 96 states. [2018-10-24 12:02:47,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:02:47,952 INFO L93 Difference]: Finished difference Result 292 states and 292 transitions. [2018-10-24 12:02:47,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-24 12:02:47,952 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 283 [2018-10-24 12:02:47,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:02:47,954 INFO L225 Difference]: With dead ends: 292 [2018-10-24 12:02:47,954 INFO L226 Difference]: Without dead ends: 288 [2018-10-24 12:02:47,955 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 283 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4471, Invalid=4841, Unknown=0, NotChecked=0, Total=9312 [2018-10-24 12:02:47,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2018-10-24 12:02:47,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 287. [2018-10-24 12:02:47,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2018-10-24 12:02:47,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 287 transitions. [2018-10-24 12:02:47,960 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 287 transitions. Word has length 283 [2018-10-24 12:02:47,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:02:47,960 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 287 transitions. [2018-10-24 12:02:47,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-24 12:02:47,960 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 287 transitions. [2018-10-24 12:02:47,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2018-10-24 12:02:47,961 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:02:47,962 INFO L375 BasicCegarLoop]: trace histogram [94, 93, 93, 1, 1, 1, 1, 1, 1] [2018-10-24 12:02:47,962 INFO L424 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:02:47,962 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:02:47,962 INFO L82 PathProgramCache]: Analyzing trace with hash -258240405, now seen corresponding path program 93 times [2018-10-24 12:02:47,962 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:02:47,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:02:47,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:02:47,963 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:02:47,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:02:48,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:02:51,266 INFO L134 CoverageAnalysis]: Checked inductivity of 13020 backedges. 0 proven. 13020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:51,266 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:02:51,266 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:02:51,294 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 12:02:51,593 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 94 check-sat command(s) [2018-10-24 12:02:51,593 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:02:51,600 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:02:51,721 INFO L134 CoverageAnalysis]: Checked inductivity of 13020 backedges. 0 proven. 13020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:51,744 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:02:51,744 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-10-24 12:02:51,744 INFO L460 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-10-24 12:02:51,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-10-24 12:02:51,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2018-10-24 12:02:51,745 INFO L87 Difference]: Start difference. First operand 287 states and 287 transitions. Second operand 97 states. [2018-10-24 12:02:52,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:02:52,110 INFO L93 Difference]: Finished difference Result 295 states and 295 transitions. [2018-10-24 12:02:52,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-10-24 12:02:52,110 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 286 [2018-10-24 12:02:52,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:02:52,111 INFO L225 Difference]: With dead ends: 295 [2018-10-24 12:02:52,111 INFO L226 Difference]: Without dead ends: 291 [2018-10-24 12:02:52,112 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 286 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4566, Invalid=4940, Unknown=0, NotChecked=0, Total=9506 [2018-10-24 12:02:52,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2018-10-24 12:02:52,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 290. [2018-10-24 12:02:52,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2018-10-24 12:02:52,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 290 transitions. [2018-10-24 12:02:52,115 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 290 transitions. Word has length 286 [2018-10-24 12:02:52,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:02:52,116 INFO L481 AbstractCegarLoop]: Abstraction has 290 states and 290 transitions. [2018-10-24 12:02:52,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-10-24 12:02:52,116 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 290 transitions. [2018-10-24 12:02:52,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2018-10-24 12:02:52,117 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:02:52,117 INFO L375 BasicCegarLoop]: trace histogram [95, 94, 94, 1, 1, 1, 1, 1, 1] [2018-10-24 12:02:52,117 INFO L424 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:02:52,117 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:02:52,117 INFO L82 PathProgramCache]: Analyzing trace with hash 689933456, now seen corresponding path program 94 times [2018-10-24 12:02:52,118 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:02:52,118 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:02:52,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:02:52,118 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:02:52,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:02:52,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:02:55,535 INFO L134 CoverageAnalysis]: Checked inductivity of 13301 backedges. 0 proven. 13301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:55,536 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:02:55,536 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:02:55,544 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 12:02:55,701 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 12:02:55,701 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:02:55,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:02:55,839 INFO L134 CoverageAnalysis]: Checked inductivity of 13301 backedges. 0 proven. 13301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:55,861 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:02:55,861 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-10-24 12:02:55,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-24 12:02:55,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-24 12:02:55,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2018-10-24 12:02:55,862 INFO L87 Difference]: Start difference. First operand 290 states and 290 transitions. Second operand 98 states. [2018-10-24 12:02:56,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:02:56,276 INFO L93 Difference]: Finished difference Result 298 states and 298 transitions. [2018-10-24 12:02:56,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-10-24 12:02:56,276 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 289 [2018-10-24 12:02:56,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:02:56,278 INFO L225 Difference]: With dead ends: 298 [2018-10-24 12:02:56,278 INFO L226 Difference]: Without dead ends: 294 [2018-10-24 12:02:56,279 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 289 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4662, Invalid=5040, Unknown=0, NotChecked=0, Total=9702 [2018-10-24 12:02:56,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2018-10-24 12:02:56,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 293. [2018-10-24 12:02:56,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2018-10-24 12:02:56,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 293 transitions. [2018-10-24 12:02:56,283 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 293 transitions. Word has length 289 [2018-10-24 12:02:56,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:02:56,283 INFO L481 AbstractCegarLoop]: Abstraction has 293 states and 293 transitions. [2018-10-24 12:02:56,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-24 12:02:56,284 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 293 transitions. [2018-10-24 12:02:56,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2018-10-24 12:02:56,285 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:02:56,285 INFO L375 BasicCegarLoop]: trace histogram [96, 95, 95, 1, 1, 1, 1, 1, 1] [2018-10-24 12:02:56,285 INFO L424 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:02:56,285 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:02:56,285 INFO L82 PathProgramCache]: Analyzing trace with hash -262479285, now seen corresponding path program 95 times [2018-10-24 12:02:56,285 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:02:56,285 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:02:56,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:02:56,286 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:02:56,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:02:56,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:02:59,747 INFO L134 CoverageAnalysis]: Checked inductivity of 13585 backedges. 0 proven. 13585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:59,748 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:02:59,748 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:02:59,760 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 12:03:00,114 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 96 check-sat command(s) [2018-10-24 12:03:00,114 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:03:00,121 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:03:00,248 INFO L134 CoverageAnalysis]: Checked inductivity of 13585 backedges. 0 proven. 13585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:03:00,271 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:03:00,271 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-10-24 12:03:00,271 INFO L460 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-10-24 12:03:00,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-10-24 12:03:00,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2018-10-24 12:03:00,273 INFO L87 Difference]: Start difference. First operand 293 states and 293 transitions. Second operand 99 states. [2018-10-24 12:03:00,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:03:00,735 INFO L93 Difference]: Finished difference Result 301 states and 301 transitions. [2018-10-24 12:03:00,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-24 12:03:00,736 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 292 [2018-10-24 12:03:00,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:03:00,738 INFO L225 Difference]: With dead ends: 301 [2018-10-24 12:03:00,738 INFO L226 Difference]: Without dead ends: 297 [2018-10-24 12:03:00,738 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 292 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4759, Invalid=5141, Unknown=0, NotChecked=0, Total=9900 [2018-10-24 12:03:00,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2018-10-24 12:03:00,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 296. [2018-10-24 12:03:00,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2018-10-24 12:03:00,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 296 transitions. [2018-10-24 12:03:00,742 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 296 transitions. Word has length 292 [2018-10-24 12:03:00,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:03:00,742 INFO L481 AbstractCegarLoop]: Abstraction has 296 states and 296 transitions. [2018-10-24 12:03:00,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-10-24 12:03:00,742 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 296 transitions. [2018-10-24 12:03:00,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2018-10-24 12:03:00,743 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:03:00,743 INFO L375 BasicCegarLoop]: trace histogram [97, 96, 96, 1, 1, 1, 1, 1, 1] [2018-10-24 12:03:00,743 INFO L424 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:03:00,744 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:03:00,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1036489040, now seen corresponding path program 96 times [2018-10-24 12:03:00,744 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:03:00,744 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:03:00,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:03:00,744 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:03:00,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:03:00,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:03:04,313 INFO L134 CoverageAnalysis]: Checked inductivity of 13872 backedges. 0 proven. 13872 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:03:04,313 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:03:04,313 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:03:04,321 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 12:03:04,644 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 97 check-sat command(s) [2018-10-24 12:03:04,644 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:03:04,652 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:03:04,780 INFO L134 CoverageAnalysis]: Checked inductivity of 13872 backedges. 0 proven. 13872 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:03:04,802 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:03:04,802 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-10-24 12:03:04,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-24 12:03:04,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-24 12:03:04,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2018-10-24 12:03:04,804 INFO L87 Difference]: Start difference. First operand 296 states and 296 transitions. Second operand 100 states. [2018-10-24 12:03:05,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:03:05,233 INFO L93 Difference]: Finished difference Result 304 states and 304 transitions. [2018-10-24 12:03:05,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-10-24 12:03:05,234 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 295 [2018-10-24 12:03:05,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:03:05,235 INFO L225 Difference]: With dead ends: 304 [2018-10-24 12:03:05,235 INFO L226 Difference]: Without dead ends: 300 [2018-10-24 12:03:05,235 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 295 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4857, Invalid=5243, Unknown=0, NotChecked=0, Total=10100 [2018-10-24 12:03:05,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2018-10-24 12:03:05,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 299. [2018-10-24 12:03:05,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-10-24 12:03:05,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 299 transitions. [2018-10-24 12:03:05,240 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 299 transitions. Word has length 295 [2018-10-24 12:03:05,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:03:05,240 INFO L481 AbstractCegarLoop]: Abstraction has 299 states and 299 transitions. [2018-10-24 12:03:05,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-24 12:03:05,240 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 299 transitions. [2018-10-24 12:03:05,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2018-10-24 12:03:05,241 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:03:05,241 INFO L375 BasicCegarLoop]: trace histogram [98, 97, 97, 1, 1, 1, 1, 1, 1] [2018-10-24 12:03:05,241 INFO L424 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:03:05,241 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:03:05,242 INFO L82 PathProgramCache]: Analyzing trace with hash 118311979, now seen corresponding path program 97 times [2018-10-24 12:03:05,242 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:03:05,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:03:05,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:03:05,242 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:03:05,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:03:05,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:03:08,925 INFO L134 CoverageAnalysis]: Checked inductivity of 14162 backedges. 0 proven. 14162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:03:08,925 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:03:08,925 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:03:08,935 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:03:09,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:03:09,104 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:03:09,239 INFO L134 CoverageAnalysis]: Checked inductivity of 14162 backedges. 0 proven. 14162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:03:09,260 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:03:09,261 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-10-24 12:03:09,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-10-24 12:03:09,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-10-24 12:03:09,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2018-10-24 12:03:09,262 INFO L87 Difference]: Start difference. First operand 299 states and 299 transitions. Second operand 101 states. [2018-10-24 12:03:09,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:03:09,638 INFO L93 Difference]: Finished difference Result 307 states and 307 transitions. [2018-10-24 12:03:09,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-10-24 12:03:09,638 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 298 [2018-10-24 12:03:09,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:03:09,640 INFO L225 Difference]: With dead ends: 307 [2018-10-24 12:03:09,640 INFO L226 Difference]: Without dead ends: 303 [2018-10-24 12:03:09,640 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 298 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4956, Invalid=5346, Unknown=0, NotChecked=0, Total=10302 [2018-10-24 12:03:09,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-10-24 12:03:09,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 302. [2018-10-24 12:03:09,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2018-10-24 12:03:09,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 302 transitions. [2018-10-24 12:03:09,644 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 302 transitions. Word has length 298 [2018-10-24 12:03:09,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:03:09,644 INFO L481 AbstractCegarLoop]: Abstraction has 302 states and 302 transitions. [2018-10-24 12:03:09,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-10-24 12:03:09,645 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 302 transitions. [2018-10-24 12:03:09,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2018-10-24 12:03:09,646 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:03:09,646 INFO L375 BasicCegarLoop]: trace histogram [99, 98, 98, 1, 1, 1, 1, 1, 1] [2018-10-24 12:03:09,646 INFO L424 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:03:09,646 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:03:09,646 INFO L82 PathProgramCache]: Analyzing trace with hash 107428048, now seen corresponding path program 98 times [2018-10-24 12:03:09,646 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:03:09,646 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:03:09,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:03:09,647 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:03:09,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:03:09,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:03:13,369 INFO L134 CoverageAnalysis]: Checked inductivity of 14455 backedges. 0 proven. 14455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:03:13,369 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:03:13,369 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:03:13,377 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 12:03:13,545 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 12:03:13,545 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:03:13,552 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:03:13,683 INFO L134 CoverageAnalysis]: Checked inductivity of 14455 backedges. 0 proven. 14455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:03:13,705 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:03:13,706 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-10-24 12:03:13,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-24 12:03:13,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-24 12:03:13,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2018-10-24 12:03:13,707 INFO L87 Difference]: Start difference. First operand 302 states and 302 transitions. Second operand 102 states. [2018-10-24 12:03:14,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:03:14,153 INFO L93 Difference]: Finished difference Result 310 states and 310 transitions. [2018-10-24 12:03:14,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-10-24 12:03:14,153 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 301 [2018-10-24 12:03:14,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:03:14,154 INFO L225 Difference]: With dead ends: 310 [2018-10-24 12:03:14,154 INFO L226 Difference]: Without dead ends: 306 [2018-10-24 12:03:14,155 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 301 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5056, Invalid=5450, Unknown=0, NotChecked=0, Total=10506 [2018-10-24 12:03:14,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2018-10-24 12:03:14,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 305. [2018-10-24 12:03:14,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2018-10-24 12:03:14,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 305 transitions. [2018-10-24 12:03:14,159 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 305 transitions. Word has length 301 [2018-10-24 12:03:14,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:03:14,159 INFO L481 AbstractCegarLoop]: Abstraction has 305 states and 305 transitions. [2018-10-24 12:03:14,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-24 12:03:14,159 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 305 transitions. [2018-10-24 12:03:14,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2018-10-24 12:03:14,160 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:03:14,161 INFO L375 BasicCegarLoop]: trace histogram [100, 99, 99, 1, 1, 1, 1, 1, 1] [2018-10-24 12:03:14,161 INFO L424 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:03:14,161 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:03:14,161 INFO L82 PathProgramCache]: Analyzing trace with hash -2013213173, now seen corresponding path program 99 times [2018-10-24 12:03:14,161 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:03:14,161 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:03:14,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:03:14,162 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:03:14,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:03:14,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:03:18,085 INFO L134 CoverageAnalysis]: Checked inductivity of 14751 backedges. 0 proven. 14751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:03:18,086 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:03:18,086 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:03:18,093 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 12:03:18,464 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 100 check-sat command(s) [2018-10-24 12:03:18,465 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:03:18,472 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:03:18,606 INFO L134 CoverageAnalysis]: Checked inductivity of 14751 backedges. 0 proven. 14751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:03:18,630 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:03:18,630 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-10-24 12:03:18,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-10-24 12:03:18,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-10-24 12:03:18,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2018-10-24 12:03:18,632 INFO L87 Difference]: Start difference. First operand 305 states and 305 transitions. Second operand 103 states. [2018-10-24 12:03:19,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:03:19,169 INFO L93 Difference]: Finished difference Result 313 states and 313 transitions. [2018-10-24 12:03:19,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-10-24 12:03:19,170 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 304 [2018-10-24 12:03:19,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:03:19,171 INFO L225 Difference]: With dead ends: 313 [2018-10-24 12:03:19,171 INFO L226 Difference]: Without dead ends: 309 [2018-10-24 12:03:19,172 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 304 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5157, Invalid=5555, Unknown=0, NotChecked=0, Total=10712 [2018-10-24 12:03:19,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2018-10-24 12:03:19,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 308. [2018-10-24 12:03:19,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2018-10-24 12:03:19,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 308 transitions. [2018-10-24 12:03:19,178 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 308 transitions. Word has length 304 [2018-10-24 12:03:19,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:03:19,178 INFO L481 AbstractCegarLoop]: Abstraction has 308 states and 308 transitions. [2018-10-24 12:03:19,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-10-24 12:03:19,178 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 308 transitions. [2018-10-24 12:03:19,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2018-10-24 12:03:19,180 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:03:19,180 INFO L375 BasicCegarLoop]: trace histogram [101, 100, 100, 1, 1, 1, 1, 1, 1] [2018-10-24 12:03:19,180 INFO L424 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:03:19,180 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:03:19,181 INFO L82 PathProgramCache]: Analyzing trace with hash 933096176, now seen corresponding path program 100 times [2018-10-24 12:03:19,181 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:03:19,181 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:03:19,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:03:19,182 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:03:19,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:03:19,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:03:23,444 INFO L134 CoverageAnalysis]: Checked inductivity of 15050 backedges. 0 proven. 15050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:03:23,444 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:03:23,444 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:03:23,452 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 12:03:23,622 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 12:03:23,623 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:03:23,630 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:03:23,766 INFO L134 CoverageAnalysis]: Checked inductivity of 15050 backedges. 0 proven. 15050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:03:23,788 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:03:23,788 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-10-24 12:03:23,789 INFO L460 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-24 12:03:23,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-24 12:03:23,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2018-10-24 12:03:23,791 INFO L87 Difference]: Start difference. First operand 308 states and 308 transitions. Second operand 104 states. [2018-10-24 12:03:24,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:03:24,241 INFO L93 Difference]: Finished difference Result 316 states and 316 transitions. [2018-10-24 12:03:24,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-10-24 12:03:24,241 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 307 [2018-10-24 12:03:24,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:03:24,243 INFO L225 Difference]: With dead ends: 316 [2018-10-24 12:03:24,243 INFO L226 Difference]: Without dead ends: 312 [2018-10-24 12:03:24,244 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 307 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5259, Invalid=5661, Unknown=0, NotChecked=0, Total=10920 [2018-10-24 12:03:24,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2018-10-24 12:03:24,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 311. [2018-10-24 12:03:24,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2018-10-24 12:03:24,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 311 transitions. [2018-10-24 12:03:24,248 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 311 transitions. Word has length 307 [2018-10-24 12:03:24,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:03:24,249 INFO L481 AbstractCegarLoop]: Abstraction has 311 states and 311 transitions. [2018-10-24 12:03:24,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-24 12:03:24,249 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 311 transitions. [2018-10-24 12:03:24,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2018-10-24 12:03:24,250 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:03:24,250 INFO L375 BasicCegarLoop]: trace histogram [102, 101, 101, 1, 1, 1, 1, 1, 1] [2018-10-24 12:03:24,251 INFO L424 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:03:24,251 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:03:24,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1811716117, now seen corresponding path program 101 times [2018-10-24 12:03:24,251 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:03:24,251 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:03:24,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:03:24,252 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:03:24,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:03:24,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:03:28,226 INFO L134 CoverageAnalysis]: Checked inductivity of 15352 backedges. 0 proven. 15352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:03:28,226 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:03:28,226 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:03:28,235 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 12:03:28,593 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 102 check-sat command(s) [2018-10-24 12:03:28,593 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:03:28,600 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:03:28,935 INFO L134 CoverageAnalysis]: Checked inductivity of 15352 backedges. 0 proven. 15352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:03:28,958 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:03:28,958 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-10-24 12:03:28,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-10-24 12:03:28,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-10-24 12:03:28,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2018-10-24 12:03:28,959 INFO L87 Difference]: Start difference. First operand 311 states and 311 transitions. Second operand 105 states. [2018-10-24 12:03:29,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:03:29,619 INFO L93 Difference]: Finished difference Result 319 states and 319 transitions. [2018-10-24 12:03:29,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-10-24 12:03:29,619 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 310 [2018-10-24 12:03:29,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:03:29,620 INFO L225 Difference]: With dead ends: 319 [2018-10-24 12:03:29,620 INFO L226 Difference]: Without dead ends: 315 [2018-10-24 12:03:29,620 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 310 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5362, Invalid=5768, Unknown=0, NotChecked=0, Total=11130 [2018-10-24 12:03:29,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-10-24 12:03:29,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 314. [2018-10-24 12:03:29,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2018-10-24 12:03:29,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 314 transitions. [2018-10-24 12:03:29,626 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 314 transitions. Word has length 310 [2018-10-24 12:03:29,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:03:29,626 INFO L481 AbstractCegarLoop]: Abstraction has 314 states and 314 transitions. [2018-10-24 12:03:29,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-10-24 12:03:29,627 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 314 transitions. [2018-10-24 12:03:29,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2018-10-24 12:03:29,628 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:03:29,628 INFO L375 BasicCegarLoop]: trace histogram [103, 102, 102, 1, 1, 1, 1, 1, 1] [2018-10-24 12:03:29,629 INFO L424 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:03:29,629 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:03:29,629 INFO L82 PathProgramCache]: Analyzing trace with hash -632388336, now seen corresponding path program 102 times [2018-10-24 12:03:29,629 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:03:29,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:03:29,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:03:29,630 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:03:29,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:03:29,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:03:33,709 INFO L134 CoverageAnalysis]: Checked inductivity of 15657 backedges. 0 proven. 15657 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:03:33,709 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:03:33,709 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:03:33,717 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 12:03:34,087 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 103 check-sat command(s) [2018-10-24 12:03:34,088 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:03:34,096 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:03:34,284 INFO L134 CoverageAnalysis]: Checked inductivity of 15657 backedges. 0 proven. 15657 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:03:34,307 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:03:34,307 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-10-24 12:03:34,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-10-24 12:03:34,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-10-24 12:03:34,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2018-10-24 12:03:34,309 INFO L87 Difference]: Start difference. First operand 314 states and 314 transitions. Second operand 106 states. [2018-10-24 12:03:34,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:03:34,781 INFO L93 Difference]: Finished difference Result 322 states and 322 transitions. [2018-10-24 12:03:34,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-10-24 12:03:34,782 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 313 [2018-10-24 12:03:34,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:03:34,783 INFO L225 Difference]: With dead ends: 322 [2018-10-24 12:03:34,783 INFO L226 Difference]: Without dead ends: 318 [2018-10-24 12:03:34,784 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 313 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5466, Invalid=5876, Unknown=0, NotChecked=0, Total=11342 [2018-10-24 12:03:34,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2018-10-24 12:03:34,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 317. [2018-10-24 12:03:34,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2018-10-24 12:03:34,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 317 transitions. [2018-10-24 12:03:34,789 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 317 transitions. Word has length 313 [2018-10-24 12:03:34,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:03:34,790 INFO L481 AbstractCegarLoop]: Abstraction has 317 states and 317 transitions. [2018-10-24 12:03:34,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-10-24 12:03:34,790 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 317 transitions. [2018-10-24 12:03:34,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2018-10-24 12:03:34,791 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:03:34,791 INFO L375 BasicCegarLoop]: trace histogram [104, 103, 103, 1, 1, 1, 1, 1, 1] [2018-10-24 12:03:34,792 INFO L424 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:03:34,792 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:03:34,792 INFO L82 PathProgramCache]: Analyzing trace with hash -110945845, now seen corresponding path program 103 times [2018-10-24 12:03:34,792 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:03:34,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:03:34,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:03:34,793 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:03:34,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:03:34,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:03:38,928 INFO L134 CoverageAnalysis]: Checked inductivity of 15965 backedges. 0 proven. 15965 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:03:38,928 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:03:38,928 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:03:38,937 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:03:39,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:03:39,111 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:03:39,257 INFO L134 CoverageAnalysis]: Checked inductivity of 15965 backedges. 0 proven. 15965 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:03:39,278 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:03:39,278 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-10-24 12:03:39,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-10-24 12:03:39,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-10-24 12:03:39,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2018-10-24 12:03:39,280 INFO L87 Difference]: Start difference. First operand 317 states and 317 transitions. Second operand 107 states. [2018-10-24 12:03:39,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:03:39,804 INFO L93 Difference]: Finished difference Result 325 states and 325 transitions. [2018-10-24 12:03:39,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-10-24 12:03:39,804 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 316 [2018-10-24 12:03:39,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:03:39,805 INFO L225 Difference]: With dead ends: 325 [2018-10-24 12:03:39,806 INFO L226 Difference]: Without dead ends: 321 [2018-10-24 12:03:39,806 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 316 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5571, Invalid=5985, Unknown=0, NotChecked=0, Total=11556 [2018-10-24 12:03:39,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2018-10-24 12:03:39,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 320. [2018-10-24 12:03:39,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2018-10-24 12:03:39,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 320 transitions. [2018-10-24 12:03:39,810 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 320 transitions. Word has length 316 [2018-10-24 12:03:39,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:03:39,810 INFO L481 AbstractCegarLoop]: Abstraction has 320 states and 320 transitions. [2018-10-24 12:03:39,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-10-24 12:03:39,810 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 320 transitions. [2018-10-24 12:03:39,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2018-10-24 12:03:39,811 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:03:39,811 INFO L375 BasicCegarLoop]: trace histogram [105, 104, 104, 1, 1, 1, 1, 1, 1] [2018-10-24 12:03:39,811 INFO L424 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:03:39,812 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:03:39,812 INFO L82 PathProgramCache]: Analyzing trace with hash -714406096, now seen corresponding path program 104 times [2018-10-24 12:03:39,812 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:03:39,812 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:03:39,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:03:39,812 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:03:39,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:03:39,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-24 12:03:43,689 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 12:03:43,693 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 12:03:43,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 12:03:43 BoogieIcfgContainer [2018-10-24 12:03:43,693 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 12:03:43,694 INFO L168 Benchmark]: Toolchain (without parser) took 231119.05 ms. Allocated memory was 1.5 GB in the beginning and 2.9 GB in the end (delta: 1.3 GB). Free memory was 1.4 GB in the beginning and 2.0 GB in the end (delta: -538.9 MB). Peak memory consumption was 790.7 MB. Max. memory is 7.1 GB. [2018-10-24 12:03:43,696 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 12:03:43,696 INFO L168 Benchmark]: CACSL2BoogieTranslator took 291.96 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. [2018-10-24 12:03:43,696 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.18 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. [2018-10-24 12:03:43,697 INFO L168 Benchmark]: Boogie Preprocessor took 22.79 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. [2018-10-24 12:03:43,697 INFO L168 Benchmark]: RCFGBuilder took 461.46 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 750.8 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -811.5 MB). Peak memory consumption was 24.6 MB. Max. memory is 7.1 GB. [2018-10-24 12:03:43,697 INFO L168 Benchmark]: TraceAbstraction took 230301.01 ms. Allocated memory was 2.3 GB in the beginning and 2.9 GB in the end (delta: 578.8 MB). Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 262.1 MB). Peak memory consumption was 840.9 MB. Max. memory is 7.1 GB. [2018-10-24 12:03:43,699 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 291.96 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 37.18 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 22.79 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 461.46 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 750.8 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -811.5 MB). Peak memory consumption was 24.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 230301.01 ms. Allocated memory was 2.3 GB in the beginning and 2.9 GB in the end (delta: 578.8 MB). Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 262.1 MB). Peak memory consumption was 840.9 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 analyzing trace of length 320 with TraceHistMax 105,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateComparison was comparing new predicate (quantifier-free) to 105 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. TIMEOUT Result, 230.2s OverallTime, 106 OverallIterations, 105 TraceHistogramMax, 24.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 742 SDtfs, 5562 SDslu, 23554 SDs, 0 SdLazy, 8998 SolverSat, 181 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 11.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22560 GetRequests, 16794 SyntacticMatches, 102 SemanticMatches, 5664 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10710 ImplicationChecksByTransitivity, 174.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=320occurred in iteration=105, 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: 0.3s AutomataMinimizationTime, 105 MinimizatonAttempts, 103 StatesRemovedByMinimization, 103 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.7s SsaConstructionTime, 15.4s SatisfiabilityAnalysisTime, 178.3s InterpolantComputationTime, 33591 NumberOfCodeBlocks, 33591 NumberOfCodeBlocksAsserted, 2928 NumberOfCheckSat, 33383 ConstructedInterpolants, 0 QuantifiedInterpolants, 21002125 SizeOfPredicates, 308 NumberOfNonLiveVariables, 65920 ConjunctsInSsa, 6073 ConjunctsInUnsatCore, 208 InterpolantComputations, 2 PerfectInterpolantSequences, 0/1114048 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown