java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-new/count_by_k.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c6af20d [2019-09-03 19:54:49,861 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-03 19:54:49,865 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-03 19:54:49,883 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-03 19:54:49,883 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-03 19:54:49,884 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-03 19:54:49,885 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-03 19:54:49,887 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-03 19:54:49,889 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-03 19:54:49,890 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-03 19:54:49,890 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-03 19:54:49,892 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-03 19:54:49,892 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-03 19:54:49,893 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-03 19:54:49,894 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-03 19:54:49,895 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-03 19:54:49,899 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-03 19:54:49,900 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-03 19:54:49,901 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-03 19:54:49,903 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-03 19:54:49,904 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-03 19:54:49,905 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-03 19:54:49,906 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-03 19:54:49,907 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-03 19:54:49,909 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-03 19:54:49,916 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-03 19:54:49,917 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-03 19:54:49,918 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-03 19:54:49,918 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-09-03 19:54:49,932 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-03 19:54:49,932 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-03 19:54:49,933 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-03 19:54:49,934 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-03 19:54:49,934 INFO L138 SettingsManager]: * Use SBE=true [2019-09-03 19:54:49,934 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-03 19:54:49,934 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-03 19:54:49,934 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-03 19:54:49,935 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-03 19:54:49,935 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-03 19:54:49,935 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-03 19:54:49,935 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-03 19:54:49,935 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-03 19:54:49,936 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-03 19:54:49,936 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-03 19:54:49,936 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-03 19:54:49,936 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-03 19:54:49,936 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-03 19:54:49,937 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-03 19:54:49,937 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-03 19:54:49,937 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-03 19:54:49,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 19:54:49,937 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-03 19:54:49,938 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-03 19:54:49,938 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-03 19:54:49,938 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-03 19:54:49,938 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-03 19:54:49,938 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-03 19:54:49,939 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-03 19:54:49,969 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-03 19:54:49,980 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-03 19:54:49,983 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-03 19:54:49,984 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-03 19:54:49,985 INFO L275 PluginConnector]: CDTParser initialized [2019-09-03 19:54:49,985 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/count_by_k.i [2019-09-03 19:54:50,045 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a08221723/fb4dc728252e405b9fed0fcfca8cbbb4/FLAGe25d224f0 [2019-09-03 19:54:50,468 INFO L306 CDTParser]: Found 1 translation units. [2019-09-03 19:54:50,471 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_k.i [2019-09-03 19:54:50,477 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a08221723/fb4dc728252e405b9fed0fcfca8cbbb4/FLAGe25d224f0 [2019-09-03 19:54:50,867 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a08221723/fb4dc728252e405b9fed0fcfca8cbbb4 [2019-09-03 19:54:50,879 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-03 19:54:50,880 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-03 19:54:50,881 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-03 19:54:50,882 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-03 19:54:50,885 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-03 19:54:50,886 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 07:54:50" (1/1) ... [2019-09-03 19:54:50,888 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b194eff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:54:50, skipping insertion in model container [2019-09-03 19:54:50,889 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 07:54:50" (1/1) ... [2019-09-03 19:54:50,896 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-03 19:54:50,909 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-03 19:54:51,074 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 19:54:51,078 INFO L188 MainTranslator]: Completed pre-run [2019-09-03 19:54:51,094 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 19:54:51,109 INFO L192 MainTranslator]: Completed translation [2019-09-03 19:54:51,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:54:51 WrapperNode [2019-09-03 19:54:51,109 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-03 19:54:51,110 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-03 19:54:51,110 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-03 19:54:51,110 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-03 19:54:51,200 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:54:51" (1/1) ... [2019-09-03 19:54:51,200 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:54:51" (1/1) ... [2019-09-03 19:54:51,205 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:54:51" (1/1) ... [2019-09-03 19:54:51,205 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:54:51" (1/1) ... [2019-09-03 19:54:51,209 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:54:51" (1/1) ... [2019-09-03 19:54:51,217 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:54:51" (1/1) ... [2019-09-03 19:54:51,218 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:54:51" (1/1) ... [2019-09-03 19:54:51,219 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-03 19:54:51,219 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-03 19:54:51,219 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-03 19:54:51,220 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-03 19:54:51,220 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:54:51" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2019-09-03 19:54:51,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-03 19:54:51,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-03 19:54:51,272 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-03 19:54:51,273 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-03 19:54:51,273 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-03 19:54:51,273 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-03 19:54:51,273 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-03 19:54:51,273 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-03 19:54:51,274 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-03 19:54:51,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-03 19:54:51,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-03 19:54:51,435 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-03 19:54:51,435 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-03 19:54:51,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 07:54:51 BoogieIcfgContainer [2019-09-03 19:54:51,437 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-03 19:54:51,438 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-03 19:54:51,438 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-03 19:54:51,446 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-03 19:54:51,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.09 07:54:50" (1/3) ... [2019-09-03 19:54:51,448 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41199da0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 07:54:51, skipping insertion in model container [2019-09-03 19:54:51,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:54:51" (2/3) ... [2019-09-03 19:54:51,448 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41199da0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 07:54:51, skipping insertion in model container [2019-09-03 19:54:51,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 07:54:51" (3/3) ... [2019-09-03 19:54:51,458 INFO L109 eAbstractionObserver]: Analyzing ICFG count_by_k.i [2019-09-03 19:54:51,489 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-03 19:54:51,508 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-03 19:54:51,543 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-03 19:54:51,589 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-03 19:54:51,590 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-03 19:54:51,590 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-03 19:54:51,590 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-03 19:54:51,590 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-03 19:54:51,590 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-03 19:54:51,590 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-03 19:54:51,591 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-03 19:54:51,591 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-03 19:54:51,606 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-09-03 19:54:51,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-09-03 19:54:51,611 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:54:51,611 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:54:51,613 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:54:51,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:54:51,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1281911547, now seen corresponding path program 1 times [2019-09-03 19:54:51,619 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:54:51,619 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:54:51,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:54:51,656 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:54:51,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:54:51,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:54:51,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:54:51,717 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 19:54:51,718 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-03 19:54:51,722 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-03 19:54:51,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-03 19:54:51,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-03 19:54:51,738 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2019-09-03 19:54:51,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:54:51,757 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2019-09-03 19:54:51,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-03 19:54:51,758 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2019-09-03 19:54:51,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:54:51,766 INFO L225 Difference]: With dead ends: 32 [2019-09-03 19:54:51,766 INFO L226 Difference]: Without dead ends: 13 [2019-09-03 19:54:51,769 INFO L628 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 [2019-09-03 19:54:51,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-09-03 19:54:51,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-09-03 19:54:51,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-09-03 19:54:51,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-09-03 19:54:51,806 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2019-09-03 19:54:51,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:54:51,806 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-09-03 19:54:51,807 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-03 19:54:51,807 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-09-03 19:54:51,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-09-03 19:54:51,807 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:54:51,808 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:54:51,808 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:54:51,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:54:51,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1287452673, now seen corresponding path program 1 times [2019-09-03 19:54:51,809 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:54:51,809 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:54:51,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:54:51,810 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:54:51,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:54:51,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:54:51,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:54:51,965 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 19:54:51,965 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-03 19:54:51,967 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-03 19:54:51,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-03 19:54:51,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-09-03 19:54:51,968 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 6 states. [2019-09-03 19:54:52,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:54:52,020 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2019-09-03 19:54:52,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-03 19:54:52,021 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-09-03 19:54:52,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:54:52,022 INFO L225 Difference]: With dead ends: 19 [2019-09-03 19:54:52,022 INFO L226 Difference]: Without dead ends: 14 [2019-09-03 19:54:52,024 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-09-03 19:54:52,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-09-03 19:54:52,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-09-03 19:54:52,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-09-03 19:54:52,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-09-03 19:54:52,029 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2019-09-03 19:54:52,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:54:52,029 INFO L475 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-09-03 19:54:52,030 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-03 19:54:52,030 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-09-03 19:54:52,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-03 19:54:52,030 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:54:52,031 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:54:52,031 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:54:52,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:54:52,032 INFO L82 PathProgramCache]: Analyzing trace with hash 843923389, now seen corresponding path program 1 times [2019-09-03 19:54:52,033 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:54:52,033 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:54:52,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:54:52,034 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:54:52,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:54:52,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:54:52,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:54:52,152 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:54:52,152 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2019-09-03 19:54:52,171 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:54:52,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:54:52,185 INFO L256 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-03 19:54:52,190 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:54:52,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (2)] Exception during sending of exit command (exit): Stream closed [2019-09-03 19:54:52,283 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:54:52,283 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2019-09-03 19:54:52,284 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-03 19:54:52,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-03 19:54:52,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-09-03 19:54:52,285 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 10 states. [2019-09-03 19:54:52,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:54:52,445 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2019-09-03 19:54:52,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-03 19:54:52,448 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2019-09-03 19:54:52,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:54:52,449 INFO L225 Difference]: With dead ends: 29 [2019-09-03 19:54:52,449 INFO L226 Difference]: Without dead ends: 20 [2019-09-03 19:54:52,450 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-09-03 19:54:52,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-09-03 19:54:52,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-09-03 19:54:52,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-09-03 19:54:52,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2019-09-03 19:54:52,460 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 13 [2019-09-03 19:54:52,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:54:52,461 INFO L475 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2019-09-03 19:54:52,461 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-03 19:54:52,461 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2019-09-03 19:54:52,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-03 19:54:52,463 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:54:52,463 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:54:52,465 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:54:52,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:54:52,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1549375991, now seen corresponding path program 2 times [2019-09-03 19:54:52,466 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:54:52,467 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:54:52,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:54:52,468 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:54:52,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:54:52,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:54:52,611 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:54:52,613 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:54:52,613 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 19:54:52,629 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:54:52,649 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 19:54:52,650 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:54:52,650 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-03 19:54:52,652 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:54:52,717 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (3)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 19:54:52,721 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:54:52,721 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2019-09-03 19:54:52,722 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-03 19:54:52,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-03 19:54:52,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-09-03 19:54:52,723 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 11 states. [2019-09-03 19:54:52,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:54:52,957 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2019-09-03 19:54:52,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-03 19:54:52,958 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2019-09-03 19:54:52,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:54:52,959 INFO L225 Difference]: With dead ends: 33 [2019-09-03 19:54:52,959 INFO L226 Difference]: Without dead ends: 28 [2019-09-03 19:54:52,960 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2019-09-03 19:54:52,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-09-03 19:54:52,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-09-03 19:54:52,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-09-03 19:54:52,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2019-09-03 19:54:52,966 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 19 [2019-09-03 19:54:52,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:54:52,967 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2019-09-03 19:54:52,967 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-03 19:54:52,967 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2019-09-03 19:54:52,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-09-03 19:54:52,968 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:54:52,968 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:54:52,969 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:54:52,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:54:52,969 INFO L82 PathProgramCache]: Analyzing trace with hash -191187985, now seen corresponding path program 3 times [2019-09-03 19:54:52,969 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:54:52,969 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:54:52,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:54:52,971 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:54:52,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:54:52,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:54:53,139 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:54:53,139 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:54:53,140 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2019-09-03 19:54:53,160 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 19:54:53,174 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-09-03 19:54:53,175 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:54:53,176 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-03 19:54:53,178 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:54:53,259 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:54:53,263 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:54:53,263 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2019-09-03 19:54:53,263 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-03 19:54:53,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-03 19:54:53,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2019-09-03 19:54:53,264 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 15 states. [2019-09-03 19:54:53,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:54:53,626 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2019-09-03 19:54:53,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-03 19:54:53,628 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2019-09-03 19:54:53,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:54:53,629 INFO L225 Difference]: With dead ends: 41 [2019-09-03 19:54:53,630 INFO L226 Difference]: Without dead ends: 36 [2019-09-03 19:54:53,632 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=187, Invalid=463, Unknown=0, NotChecked=0, Total=650 [2019-09-03 19:54:53,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-09-03 19:54:53,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-09-03 19:54:53,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-09-03 19:54:53,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2019-09-03 19:54:53,643 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 27 [2019-09-03 19:54:53,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:54:53,644 INFO L475 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2019-09-03 19:54:53,644 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-03 19:54:53,644 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2019-09-03 19:54:53,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-09-03 19:54:53,648 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:54:53,648 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:54:53,649 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:54:53,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:54:53,649 INFO L82 PathProgramCache]: Analyzing trace with hash 217994727, now seen corresponding path program 4 times [2019-09-03 19:54:53,650 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:54:53,650 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:54:53,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:54:53,651 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:54:53,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:54:53,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:54:53,953 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:54:53,954 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:54:53,954 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2019-09-03 19:54:53,969 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 19:54:53,993 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 19:54:53,993 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:54:53,997 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-03 19:54:53,999 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:54:54,097 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (5)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 19:54:54,100 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:54:54,101 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 19 [2019-09-03 19:54:54,101 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-03 19:54:54,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-03 19:54:54,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2019-09-03 19:54:54,102 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 19 states. [2019-09-03 19:54:54,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:54:54,661 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2019-09-03 19:54:54,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-03 19:54:54,662 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 35 [2019-09-03 19:54:54,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:54:54,665 INFO L225 Difference]: With dead ends: 49 [2019-09-03 19:54:54,665 INFO L226 Difference]: Without dead ends: 44 [2019-09-03 19:54:54,666 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=311, Invalid=811, Unknown=0, NotChecked=0, Total=1122 [2019-09-03 19:54:54,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-09-03 19:54:54,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-09-03 19:54:54,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-09-03 19:54:54,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2019-09-03 19:54:54,681 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 35 [2019-09-03 19:54:54,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:54:54,681 INFO L475 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2019-09-03 19:54:54,681 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-03 19:54:54,682 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2019-09-03 19:54:54,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-09-03 19:54:54,683 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:54:54,683 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:54:54,684 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:54:54,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:54:54,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1099137057, now seen corresponding path program 5 times [2019-09-03 19:54:54,685 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:54:54,685 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:54:54,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:54:54,686 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:54:54,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:54:54,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:54:54,954 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:54:54,955 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:54:54,955 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 19:54:54,970 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:54:55,011 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-09-03 19:54:55,011 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:54:55,013 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-03 19:54:55,017 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:54:55,157 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:54:55,161 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:54:55,161 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 23 [2019-09-03 19:54:55,163 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-03 19:54:55,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-03 19:54:55,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2019-09-03 19:54:55,164 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 23 states. [2019-09-03 19:54:55,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:54:55,943 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2019-09-03 19:54:55,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-03 19:54:55,944 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 43 [2019-09-03 19:54:55,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:54:55,945 INFO L225 Difference]: With dead ends: 57 [2019-09-03 19:54:55,945 INFO L226 Difference]: Without dead ends: 52 [2019-09-03 19:54:55,946 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=467, Invalid=1255, Unknown=0, NotChecked=0, Total=1722 [2019-09-03 19:54:55,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-09-03 19:54:55,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-09-03 19:54:55,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-09-03 19:54:55,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2019-09-03 19:54:55,954 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 43 [2019-09-03 19:54:55,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:54:55,955 INFO L475 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2019-09-03 19:54:55,955 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-03 19:54:55,955 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2019-09-03 19:54:55,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-09-03 19:54:55,956 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:54:55,956 INFO L399 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:54:55,957 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:54:55,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:54:55,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1441975849, now seen corresponding path program 6 times [2019-09-03 19:54:55,957 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:54:55,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:54:55,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:54:55,958 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:54:55,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:54:55,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:54:56,302 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:54:56,302 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:54:56,303 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2019-09-03 19:54:56,315 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 19:54:56,340 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2019-09-03 19:54:56,340 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:54:56,342 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-03 19:54:56,345 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:54:56,472 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:54:56,475 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:54:56,475 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 27 [2019-09-03 19:54:56,476 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-09-03 19:54:56,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-09-03 19:54:56,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=644, Unknown=0, NotChecked=0, Total=702 [2019-09-03 19:54:56,477 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 27 states. [2019-09-03 19:54:57,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:54:57,654 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2019-09-03 19:54:57,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-09-03 19:54:57,657 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 51 [2019-09-03 19:54:57,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:54:57,659 INFO L225 Difference]: With dead ends: 65 [2019-09-03 19:54:57,659 INFO L226 Difference]: Without dead ends: 60 [2019-09-03 19:54:57,660 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=655, Invalid=1795, Unknown=0, NotChecked=0, Total=2450 [2019-09-03 19:54:57,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-09-03 19:54:57,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-09-03 19:54:57,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-09-03 19:54:57,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2019-09-03 19:54:57,668 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 51 [2019-09-03 19:54:57,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:54:57,669 INFO L475 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2019-09-03 19:54:57,669 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-09-03 19:54:57,669 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2019-09-03 19:54:57,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-09-03 19:54:57,670 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:54:57,670 INFO L399 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:54:57,671 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:54:57,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:54:57,671 INFO L82 PathProgramCache]: Analyzing trace with hash -123180081, now seen corresponding path program 7 times [2019-09-03 19:54:57,671 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:54:57,671 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:54:57,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:54:57,672 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:54:57,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:54:57,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:54:58,149 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:54:58,149 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:54:58,149 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2019-09-03 19:54:58,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:54:58,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:54:58,207 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 27 conjunts are in the unsatisfiable core [2019-09-03 19:54:58,209 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:54:58,341 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (8)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 19:54:58,346 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:54:58,346 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 31 [2019-09-03 19:54:58,346 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-09-03 19:54:58,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-09-03 19:54:58,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=864, Unknown=0, NotChecked=0, Total=930 [2019-09-03 19:54:58,347 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 31 states. [2019-09-03 19:54:59,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:54:59,845 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2019-09-03 19:54:59,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-03 19:54:59,847 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 59 [2019-09-03 19:54:59,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:54:59,849 INFO L225 Difference]: With dead ends: 73 [2019-09-03 19:54:59,849 INFO L226 Difference]: Without dead ends: 68 [2019-09-03 19:54:59,850 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=875, Invalid=2431, Unknown=0, NotChecked=0, Total=3306 [2019-09-03 19:54:59,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-09-03 19:54:59,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-09-03 19:54:59,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-09-03 19:54:59,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2019-09-03 19:54:59,858 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 59 [2019-09-03 19:54:59,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:54:59,859 INFO L475 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2019-09-03 19:54:59,859 INFO L476 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-09-03 19:54:59,859 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2019-09-03 19:54:59,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-09-03 19:54:59,860 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:54:59,860 INFO L399 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:54:59,861 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:54:59,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:54:59,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1531325895, now seen corresponding path program 8 times [2019-09-03 19:54:59,861 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:54:59,861 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:54:59,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:54:59,862 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:54:59,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:54:59,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:55:00,519 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:55:00,519 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:55:00,519 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2019-09-03 19:55:00,534 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 19:55:00,594 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 19:55:00,594 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:55:00,625 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 31 conjunts are in the unsatisfiable core [2019-09-03 19:55:00,628 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:55:00,791 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:55:00,794 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:55:00,795 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 35 [2019-09-03 19:55:00,795 INFO L454 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-09-03 19:55:00,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-09-03 19:55:00,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=1116, Unknown=0, NotChecked=0, Total=1190 [2019-09-03 19:55:00,797 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 35 states. [2019-09-03 19:55:02,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:55:02,855 INFO L93 Difference]: Finished difference Result 81 states and 84 transitions. [2019-09-03 19:55:02,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-09-03 19:55:02,857 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 67 [2019-09-03 19:55:02,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:55:02,858 INFO L225 Difference]: With dead ends: 81 [2019-09-03 19:55:02,858 INFO L226 Difference]: Without dead ends: 76 [2019-09-03 19:55:02,860 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1127, Invalid=3163, Unknown=0, NotChecked=0, Total=4290 [2019-09-03 19:55:02,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-09-03 19:55:02,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2019-09-03 19:55:02,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-09-03 19:55:02,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2019-09-03 19:55:02,868 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 67 [2019-09-03 19:55:02,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:55:02,869 INFO L475 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2019-09-03 19:55:02,869 INFO L476 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-09-03 19:55:02,869 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2019-09-03 19:55:02,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-09-03 19:55:02,870 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:55:02,870 INFO L399 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:55:02,871 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:55:02,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:55:02,871 INFO L82 PathProgramCache]: Analyzing trace with hash 182351807, now seen corresponding path program 9 times [2019-09-03 19:55:02,871 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:55:02,871 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:55:02,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:55:02,872 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:55:02,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:55:02,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:55:03,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:55:03,594 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:55:03,595 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 19:55:03,627 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:55:03,684 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2019-09-03 19:55:03,685 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:55:03,688 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 35 conjunts are in the unsatisfiable core [2019-09-03 19:55:03,698 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:55:03,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:55:03,887 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:55:03,887 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 39 [2019-09-03 19:55:03,888 INFO L454 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-09-03 19:55:03,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-09-03 19:55:03,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1400, Unknown=0, NotChecked=0, Total=1482 [2019-09-03 19:55:03,889 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 39 states. [2019-09-03 19:55:06,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:55:06,774 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2019-09-03 19:55:06,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-09-03 19:55:06,774 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 75 [2019-09-03 19:55:06,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:55:06,776 INFO L225 Difference]: With dead ends: 89 [2019-09-03 19:55:06,776 INFO L226 Difference]: Without dead ends: 84 [2019-09-03 19:55:06,779 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1411, Invalid=3991, Unknown=0, NotChecked=0, Total=5402 [2019-09-03 19:55:06,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-09-03 19:55:06,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2019-09-03 19:55:06,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-09-03 19:55:06,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2019-09-03 19:55:06,788 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 75 [2019-09-03 19:55:06,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:55:06,789 INFO L475 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2019-09-03 19:55:06,789 INFO L476 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-09-03 19:55:06,789 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2019-09-03 19:55:06,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-09-03 19:55:06,790 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:55:06,790 INFO L399 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:55:06,791 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:55:06,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:55:06,791 INFO L82 PathProgramCache]: Analyzing trace with hash -932623945, now seen corresponding path program 10 times [2019-09-03 19:55:06,791 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:55:06,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:55:06,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:55:06,792 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:55:06,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:55:06,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:55:07,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:55:07,612 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:55:07,612 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2019-09-03 19:55:07,624 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 19:55:07,676 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 19:55:07,676 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:55:07,684 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 39 conjunts are in the unsatisfiable core [2019-09-03 19:55:07,687 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:55:07,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:55:07,877 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:55:07,877 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 43 [2019-09-03 19:55:07,878 INFO L454 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-09-03 19:55:07,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-09-03 19:55:07,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1716, Unknown=0, NotChecked=0, Total=1806 [2019-09-03 19:55:07,879 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 43 states. [2019-09-03 19:55:11,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:55:11,160 INFO L93 Difference]: Finished difference Result 97 states and 100 transitions. [2019-09-03 19:55:11,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-09-03 19:55:11,160 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 83 [2019-09-03 19:55:11,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:55:11,161 INFO L225 Difference]: With dead ends: 97 [2019-09-03 19:55:11,161 INFO L226 Difference]: Without dead ends: 92 [2019-09-03 19:55:11,165 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1727, Invalid=4915, Unknown=0, NotChecked=0, Total=6642 [2019-09-03 19:55:11,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-09-03 19:55:11,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2019-09-03 19:55:11,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-09-03 19:55:11,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2019-09-03 19:55:11,188 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 83 [2019-09-03 19:55:11,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:55:11,189 INFO L475 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2019-09-03 19:55:11,189 INFO L476 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-09-03 19:55:11,193 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2019-09-03 19:55:11,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-09-03 19:55:11,196 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:55:11,197 INFO L399 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:55:11,197 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:55:11,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:55:11,197 INFO L82 PathProgramCache]: Analyzing trace with hash -589388881, now seen corresponding path program 11 times [2019-09-03 19:55:11,198 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:55:11,198 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:55:11,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:55:11,199 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:55:11,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:55:11,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:55:12,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:55:12,295 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:55:12,295 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2019-09-03 19:55:12,307 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 19:55:12,403 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 41 check-sat command(s) [2019-09-03 19:55:12,404 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:55:12,408 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2019-09-03 19:55:12,410 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:55:12,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:55:12,596 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:55:12,596 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 47 [2019-09-03 19:55:12,596 INFO L454 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-09-03 19:55:12,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-09-03 19:55:12,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=2064, Unknown=0, NotChecked=0, Total=2162 [2019-09-03 19:55:12,597 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 47 states. [2019-09-03 19:55:16,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:55:16,649 INFO L93 Difference]: Finished difference Result 105 states and 108 transitions. [2019-09-03 19:55:16,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-09-03 19:55:16,650 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 91 [2019-09-03 19:55:16,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:55:16,651 INFO L225 Difference]: With dead ends: 105 [2019-09-03 19:55:16,651 INFO L226 Difference]: Without dead ends: 100 [2019-09-03 19:55:16,653 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2075, Invalid=5935, Unknown=0, NotChecked=0, Total=8010 [2019-09-03 19:55:16,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-09-03 19:55:16,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2019-09-03 19:55:16,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-09-03 19:55:16,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2019-09-03 19:55:16,661 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 91 [2019-09-03 19:55:16,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:55:16,662 INFO L475 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2019-09-03 19:55:16,662 INFO L476 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-09-03 19:55:16,662 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2019-09-03 19:55:16,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-09-03 19:55:16,663 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:55:16,664 INFO L399 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:55:16,664 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:55:16,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:55:16,664 INFO L82 PathProgramCache]: Analyzing trace with hash 423003559, now seen corresponding path program 12 times [2019-09-03 19:55:16,664 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:55:16,664 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:55:16,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:55:16,665 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:55:16,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:55:16,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:55:17,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:55:17,844 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:55:17,844 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2019-09-03 19:55:17,855 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 19:55:17,914 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 45 check-sat command(s) [2019-09-03 19:55:17,915 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:55:17,917 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 47 conjunts are in the unsatisfiable core [2019-09-03 19:55:17,919 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:55:18,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:55:18,118 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:55:18,119 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 51 [2019-09-03 19:55:18,119 INFO L454 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-09-03 19:55:18,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-09-03 19:55:18,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=2444, Unknown=0, NotChecked=0, Total=2550 [2019-09-03 19:55:18,120 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 51 states. [2019-09-03 19:55:18,861 WARN L188 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 11 [2019-09-03 19:55:23,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:55:23,104 INFO L93 Difference]: Finished difference Result 113 states and 116 transitions. [2019-09-03 19:55:23,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-09-03 19:55:23,105 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 99 [2019-09-03 19:55:23,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:55:23,106 INFO L225 Difference]: With dead ends: 113 [2019-09-03 19:55:23,106 INFO L226 Difference]: Without dead ends: 108 [2019-09-03 19:55:23,109 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=2455, Invalid=7051, Unknown=0, NotChecked=0, Total=9506 [2019-09-03 19:55:23,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-09-03 19:55:23,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2019-09-03 19:55:23,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-09-03 19:55:23,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2019-09-03 19:55:23,117 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 99 [2019-09-03 19:55:23,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:55:23,118 INFO L475 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2019-09-03 19:55:23,118 INFO L476 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-09-03 19:55:23,118 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2019-09-03 19:55:23,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-09-03 19:55:23,119 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:55:23,119 INFO L399 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:55:23,119 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:55:23,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:55:23,120 INFO L82 PathProgramCache]: Analyzing trace with hash -697765985, now seen corresponding path program 13 times [2019-09-03 19:55:23,120 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:55:23,120 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:55:23,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:55:23,121 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:55:23,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:55:23,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:55:24,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:55:24,482 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:55:24,482 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2019-09-03 19:55:24,495 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:55:24,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:55:24,678 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 51 conjunts are in the unsatisfiable core [2019-09-03 19:55:24,680 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:55:24,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:55:24,872 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:55:24,873 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 55 [2019-09-03 19:55:24,873 INFO L454 AbstractCegarLoop]: Interpolant automaton has 55 states [2019-09-03 19:55:24,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2019-09-03 19:55:24,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=2856, Unknown=0, NotChecked=0, Total=2970 [2019-09-03 19:55:24,875 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 55 states. [2019-09-03 19:55:25,156 WARN L188 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 8 [2019-09-03 19:55:25,288 WARN L188 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 9 [2019-09-03 19:55:25,432 WARN L188 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-03 19:55:25,563 WARN L188 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2019-09-03 19:55:25,691 WARN L188 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2019-09-03 19:55:25,827 WARN L188 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2019-09-03 19:55:30,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:55:30,910 INFO L93 Difference]: Finished difference Result 121 states and 124 transitions. [2019-09-03 19:55:30,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2019-09-03 19:55:30,911 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 107 [2019-09-03 19:55:30,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:55:30,912 INFO L225 Difference]: With dead ends: 121 [2019-09-03 19:55:30,912 INFO L226 Difference]: Without dead ends: 116 [2019-09-03 19:55:30,917 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1376 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=2867, Invalid=8263, Unknown=0, NotChecked=0, Total=11130 [2019-09-03 19:55:30,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-09-03 19:55:30,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2019-09-03 19:55:30,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-09-03 19:55:30,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2019-09-03 19:55:30,924 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 107 [2019-09-03 19:55:30,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:55:30,925 INFO L475 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2019-09-03 19:55:30,925 INFO L476 AbstractCegarLoop]: Interpolant automaton has 55 states. [2019-09-03 19:55:30,925 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2019-09-03 19:55:30,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-09-03 19:55:30,926 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:55:30,926 INFO L399 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:55:30,926 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:55:30,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:55:30,927 INFO L82 PathProgramCache]: Analyzing trace with hash -177348201, now seen corresponding path program 14 times [2019-09-03 19:55:30,927 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:55:30,927 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:55:30,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:55:30,928 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:55:30,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:55:31,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:55:32,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:55:32,683 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:55:32,683 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2019-09-03 19:55:32,696 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 19:55:32,858 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 19:55:32,859 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:55:32,937 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 55 conjunts are in the unsatisfiable core [2019-09-03 19:55:32,938 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:55:33,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:55:33,129 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:55:33,129 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 59 [2019-09-03 19:55:33,130 INFO L454 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-09-03 19:55:33,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-09-03 19:55:33,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=3300, Unknown=0, NotChecked=0, Total=3422 [2019-09-03 19:55:33,131 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 59 states. [2019-09-03 19:55:33,324 WARN L188 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 8 [2019-09-03 19:55:33,448 WARN L188 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 8 [2019-09-03 19:55:33,582 WARN L188 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 9 [2019-09-03 19:55:33,727 WARN L188 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-03 19:55:33,870 WARN L188 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-03 19:55:34,022 WARN L188 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-03 19:55:34,184 WARN L188 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-03 19:55:34,329 WARN L188 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-03 19:55:34,481 WARN L188 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2019-09-03 19:55:34,632 WARN L188 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2019-09-03 19:55:40,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:55:40,289 INFO L93 Difference]: Finished difference Result 129 states and 132 transitions. [2019-09-03 19:55:40,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2019-09-03 19:55:40,289 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 115 [2019-09-03 19:55:40,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:55:40,290 INFO L225 Difference]: With dead ends: 129 [2019-09-03 19:55:40,291 INFO L226 Difference]: Without dead ends: 124 [2019-09-03 19:55:40,292 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1594 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=3311, Invalid=9571, Unknown=0, NotChecked=0, Total=12882 [2019-09-03 19:55:40,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-09-03 19:55:40,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2019-09-03 19:55:40,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-09-03 19:55:40,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2019-09-03 19:55:40,298 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 115 [2019-09-03 19:55:40,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:55:40,298 INFO L475 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2019-09-03 19:55:40,298 INFO L476 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-09-03 19:55:40,299 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2019-09-03 19:55:40,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-09-03 19:55:40,302 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:55:40,302 INFO L399 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:55:40,302 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:55:40,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:55:40,302 INFO L82 PathProgramCache]: Analyzing trace with hash -549626993, now seen corresponding path program 15 times [2019-09-03 19:55:40,302 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:55:40,303 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:55:40,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:55:40,303 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:55:40,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:55:40,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:55:42,069 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:55:42,069 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:55:42,069 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2019-09-03 19:55:42,081 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 19:55:42,164 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 57 check-sat command(s) [2019-09-03 19:55:42,164 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:55:42,167 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 59 conjunts are in the unsatisfiable core [2019-09-03 19:55:42,169 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:55:42,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:55:42,391 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:55:42,391 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 63 [2019-09-03 19:55:42,392 INFO L454 AbstractCegarLoop]: Interpolant automaton has 63 states [2019-09-03 19:55:42,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2019-09-03 19:55:42,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=3776, Unknown=0, NotChecked=0, Total=3906 [2019-09-03 19:55:42,393 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 63 states. [2019-09-03 19:55:42,589 WARN L188 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 8 [2019-09-03 19:55:42,726 WARN L188 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 8 [2019-09-03 19:55:42,879 WARN L188 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 9 [2019-09-03 19:55:43,039 WARN L188 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2019-09-03 19:55:43,202 WARN L188 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2019-09-03 19:55:43,364 WARN L188 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2019-09-03 19:55:43,525 WARN L188 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2019-09-03 19:55:43,695 WARN L188 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-03 19:55:43,855 WARN L188 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-03 19:55:44,023 WARN L188 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-03 19:55:44,199 WARN L188 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-03 19:55:44,366 WARN L188 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-03 19:55:44,527 WARN L188 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2019-09-03 19:55:44,697 WARN L188 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2019-09-03 19:55:50,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:55:50,832 INFO L93 Difference]: Finished difference Result 137 states and 140 transitions. [2019-09-03 19:55:50,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2019-09-03 19:55:50,833 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 123 [2019-09-03 19:55:50,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:55:50,834 INFO L225 Difference]: With dead ends: 137 [2019-09-03 19:55:50,834 INFO L226 Difference]: Without dead ends: 132 [2019-09-03 19:55:50,836 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1828 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=3787, Invalid=10975, Unknown=0, NotChecked=0, Total=14762 [2019-09-03 19:55:50,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-09-03 19:55:50,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2019-09-03 19:55:50,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2019-09-03 19:55:50,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2019-09-03 19:55:50,841 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 123 [2019-09-03 19:55:50,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:55:50,842 INFO L475 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2019-09-03 19:55:50,842 INFO L476 AbstractCegarLoop]: Interpolant automaton has 63 states. [2019-09-03 19:55:50,842 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2019-09-03 19:55:50,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-09-03 19:55:50,843 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:55:50,843 INFO L399 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:55:50,843 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:55:50,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:55:50,843 INFO L82 PathProgramCache]: Analyzing trace with hash -2066784889, now seen corresponding path program 16 times [2019-09-03 19:55:50,844 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:55:50,844 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:55:50,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:55:50,844 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:55:50,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:55:51,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:55:53,000 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:55:53,001 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:55:53,001 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2019-09-03 19:55:53,011 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 19:55:53,249 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 19:55:53,249 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:55:53,405 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 63 conjunts are in the unsatisfiable core [2019-09-03 19:55:53,407 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:55:53,651 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:55:53,654 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:55:53,654 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 67 [2019-09-03 19:55:53,655 INFO L454 AbstractCegarLoop]: Interpolant automaton has 67 states [2019-09-03 19:55:53,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2019-09-03 19:55:53,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=4284, Unknown=0, NotChecked=0, Total=4422 [2019-09-03 19:55:53,656 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 67 states. [2019-09-03 19:55:53,877 WARN L188 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 8 [2019-09-03 19:55:54,034 WARN L188 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 8 [2019-09-03 19:55:54,199 WARN L188 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 9 [2019-09-03 19:55:54,369 WARN L188 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2019-09-03 19:55:54,549 WARN L188 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2019-09-03 19:55:54,725 WARN L188 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2019-09-03 19:55:54,905 WARN L188 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2019-09-03 19:55:55,087 WARN L188 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2019-09-03 19:55:55,267 WARN L188 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2019-09-03 19:55:55,451 WARN L188 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2019-09-03 19:55:55,639 WARN L188 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2019-09-03 19:55:55,835 WARN L188 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-03 19:55:56,020 WARN L188 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-03 19:55:56,205 WARN L188 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-03 19:55:56,387 WARN L188 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-03 19:55:56,574 WARN L188 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-03 19:55:56,759 WARN L188 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2019-09-03 19:55:56,950 WARN L188 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2019-09-03 19:55:57,145 WARN L188 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2019-09-03 19:56:03,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:56:03,616 INFO L93 Difference]: Finished difference Result 145 states and 148 transitions. [2019-09-03 19:56:03,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2019-09-03 19:56:03,617 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 131 [2019-09-03 19:56:03,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:56:03,619 INFO L225 Difference]: With dead ends: 145 [2019-09-03 19:56:03,619 INFO L226 Difference]: Without dead ends: 140 [2019-09-03 19:56:03,621 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2078 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=4295, Invalid=12475, Unknown=0, NotChecked=0, Total=16770 [2019-09-03 19:56:03,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2019-09-03 19:56:03,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2019-09-03 19:56:03,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-09-03 19:56:03,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2019-09-03 19:56:03,627 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 131 [2019-09-03 19:56:03,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:56:03,628 INFO L475 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2019-09-03 19:56:03,628 INFO L476 AbstractCegarLoop]: Interpolant automaton has 67 states. [2019-09-03 19:56:03,628 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2019-09-03 19:56:03,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-09-03 19:56:03,629 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:56:03,629 INFO L399 BasicCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:56:03,630 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:56:03,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:56:03,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1595664255, now seen corresponding path program 17 times [2019-09-03 19:56:03,630 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:56:03,630 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:56:03,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:03,631 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:56:03,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:03,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:56:05,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:56:05,974 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:56:05,974 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2019-09-03 19:56:05,985 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 19:56:06,242 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 65 check-sat command(s) [2019-09-03 19:56:06,243 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:56:06,255 INFO L256 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 67 conjunts are in the unsatisfiable core [2019-09-03 19:56:06,257 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:56:06,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:56:06,563 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:56:06,564 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 71 [2019-09-03 19:56:06,565 INFO L454 AbstractCegarLoop]: Interpolant automaton has 71 states [2019-09-03 19:56:06,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2019-09-03 19:56:06,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=4824, Unknown=0, NotChecked=0, Total=4970 [2019-09-03 19:56:06,566 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 71 states. [2019-09-03 19:56:06,791 WARN L188 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 8 [2019-09-03 19:56:06,956 WARN L188 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 8 [2019-09-03 19:56:07,141 WARN L188 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 9 [2019-09-03 19:56:07,331 WARN L188 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2019-09-03 19:56:07,523 WARN L188 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2019-09-03 19:56:07,722 WARN L188 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2019-09-03 19:56:07,916 WARN L188 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2019-09-03 19:56:08,114 WARN L188 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2019-09-03 19:56:08,311 WARN L188 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2019-09-03 19:56:08,511 WARN L188 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2019-09-03 19:56:08,721 WARN L188 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2019-09-03 19:56:08,919 WARN L188 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2019-09-03 19:56:09,123 WARN L188 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2019-09-03 19:56:09,326 WARN L188 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2019-09-03 19:56:09,537 WARN L188 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2019-09-03 19:56:09,746 WARN L188 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-03 19:56:09,952 WARN L188 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-03 19:56:10,165 WARN L188 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-03 19:56:10,373 WARN L188 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-03 19:56:10,573 WARN L188 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-03 19:56:10,783 WARN L188 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2019-09-03 19:56:10,988 WARN L188 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2019-09-03 19:56:18,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:56:18,164 INFO L93 Difference]: Finished difference Result 153 states and 156 transitions. [2019-09-03 19:56:18,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2019-09-03 19:56:18,164 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 139 [2019-09-03 19:56:18,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:56:18,166 INFO L225 Difference]: With dead ends: 153 [2019-09-03 19:56:18,166 INFO L226 Difference]: Without dead ends: 148 [2019-09-03 19:56:18,168 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2344 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=4835, Invalid=14071, Unknown=0, NotChecked=0, Total=18906 [2019-09-03 19:56:18,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-09-03 19:56:18,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2019-09-03 19:56:18,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-09-03 19:56:18,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2019-09-03 19:56:18,174 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 139 [2019-09-03 19:56:18,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:56:18,175 INFO L475 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2019-09-03 19:56:18,175 INFO L476 AbstractCegarLoop]: Interpolant automaton has 71 states. [2019-09-03 19:56:18,175 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2019-09-03 19:56:18,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-09-03 19:56:18,176 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:56:18,176 INFO L399 BasicCegarLoop]: trace histogram [68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:56:18,176 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:56:18,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:56:18,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1864038775, now seen corresponding path program 18 times [2019-09-03 19:56:18,176 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:56:18,176 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:56:18,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:18,177 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:56:18,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:18,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:56:20,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:56:20,737 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:56:20,737 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2019-09-03 19:56:20,746 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 19:56:20,837 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 69 check-sat command(s) [2019-09-03 19:56:20,838 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:56:20,842 INFO L256 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 71 conjunts are in the unsatisfiable core [2019-09-03 19:56:20,844 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:56:21,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:56:21,098 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:56:21,098 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 75 [2019-09-03 19:56:21,099 INFO L454 AbstractCegarLoop]: Interpolant automaton has 75 states [2019-09-03 19:56:21,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2019-09-03 19:56:21,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=5396, Unknown=0, NotChecked=0, Total=5550 [2019-09-03 19:56:21,100 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 75 states. [2019-09-03 19:56:21,350 WARN L188 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 8 [2019-09-03 19:56:21,532 WARN L188 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 8 [2019-09-03 19:56:21,745 WARN L188 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 9 [2019-09-03 19:56:21,955 WARN L188 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2019-09-03 19:56:22,172 WARN L188 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2019-09-03 19:56:22,380 WARN L188 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2019-09-03 19:56:22,590 WARN L188 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2019-09-03 19:56:22,803 WARN L188 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2019-09-03 19:56:23,019 WARN L188 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2019-09-03 19:56:23,236 WARN L188 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2019-09-03 19:56:23,449 WARN L188 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2019-09-03 19:56:23,690 WARN L188 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2019-09-03 19:56:23,911 WARN L188 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2019-09-03 19:56:24,137 WARN L188 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2019-09-03 19:56:24,363 WARN L188 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2019-09-03 19:56:24,592 WARN L188 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2019-09-03 19:56:24,874 WARN L188 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2019-09-03 19:56:25,099 WARN L188 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2019-09-03 19:56:25,333 WARN L188 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2019-09-03 19:56:25,572 WARN L188 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-03 19:56:25,790 WARN L188 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-03 19:56:26,009 WARN L188 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-03 19:56:26,242 WARN L188 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-03 19:56:26,467 WARN L188 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-03 19:56:26,700 WARN L188 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2019-09-03 19:56:26,919 WARN L188 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2019-09-03 19:56:34,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:56:34,696 INFO L93 Difference]: Finished difference Result 161 states and 164 transitions. [2019-09-03 19:56:34,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2019-09-03 19:56:34,697 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 147 [2019-09-03 19:56:34,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:56:34,698 INFO L225 Difference]: With dead ends: 161 [2019-09-03 19:56:34,698 INFO L226 Difference]: Without dead ends: 156 [2019-09-03 19:56:34,699 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2626 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=5407, Invalid=15763, Unknown=0, NotChecked=0, Total=21170 [2019-09-03 19:56:34,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2019-09-03 19:56:34,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2019-09-03 19:56:34,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-09-03 19:56:34,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2019-09-03 19:56:34,706 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 147 [2019-09-03 19:56:34,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:56:34,707 INFO L475 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2019-09-03 19:56:34,707 INFO L476 AbstractCegarLoop]: Interpolant automaton has 75 states. [2019-09-03 19:56:34,707 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2019-09-03 19:56:34,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-09-03 19:56:34,708 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:56:34,708 INFO L399 BasicCegarLoop]: trace histogram [72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:56:34,708 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:56:34,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:56:34,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1036292975, now seen corresponding path program 19 times [2019-09-03 19:56:34,709 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:56:34,709 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:56:34,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:34,710 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:56:34,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:34,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:56:37,551 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:56:37,552 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:56:37,552 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2019-09-03 19:56:37,561 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:56:37,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:56:38,106 INFO L256 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 75 conjunts are in the unsatisfiable core [2019-09-03 19:56:38,109 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:56:38,395 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:56:38,398 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:56:38,399 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 79 [2019-09-03 19:56:38,399 INFO L454 AbstractCegarLoop]: Interpolant automaton has 79 states [2019-09-03 19:56:38,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2019-09-03 19:56:38,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=6000, Unknown=0, NotChecked=0, Total=6162 [2019-09-03 19:56:38,400 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand 79 states. [2019-09-03 19:56:38,668 WARN L188 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 8 [2019-09-03 19:56:38,869 WARN L188 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 8 [2019-09-03 19:56:39,098 WARN L188 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 9 [2019-09-03 19:56:39,321 WARN L188 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2019-09-03 19:56:39,547 WARN L188 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2019-09-03 19:56:39,774 WARN L188 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2019-09-03 19:56:40,009 WARN L188 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2019-09-03 19:56:40,240 WARN L188 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2019-09-03 19:56:40,477 WARN L188 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2019-09-03 19:56:40,722 WARN L188 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2019-09-03 19:56:40,962 WARN L188 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2019-09-03 19:56:41,212 WARN L188 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2019-09-03 19:56:41,458 WARN L188 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2019-09-03 19:56:41,703 WARN L188 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2019-09-03 19:56:41,958 WARN L188 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2019-09-03 19:56:42,208 WARN L188 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2019-09-03 19:56:42,450 WARN L188 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2019-09-03 19:56:42,704 WARN L188 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2019-09-03 19:56:42,954 WARN L188 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2019-09-03 19:56:43,209 WARN L188 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2019-09-03 19:56:43,465 WARN L188 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2019-09-03 19:56:43,719 WARN L188 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2019-09-03 19:56:43,971 WARN L188 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2019-09-03 19:56:44,231 WARN L188 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-03 19:56:44,483 WARN L188 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-03 19:56:44,736 WARN L188 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-03 19:56:44,976 WARN L188 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-03 19:56:45,217 WARN L188 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-03 19:56:45,456 WARN L188 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2019-09-03 19:56:45,691 WARN L188 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2019-09-03 19:56:46,410 WARN L188 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 11 [2019-09-03 19:56:53,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:56:53,881 INFO L93 Difference]: Finished difference Result 169 states and 172 transitions. [2019-09-03 19:56:53,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2019-09-03 19:56:53,882 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 155 [2019-09-03 19:56:53,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:56:53,883 INFO L225 Difference]: With dead ends: 169 [2019-09-03 19:56:53,883 INFO L226 Difference]: Without dead ends: 164 [2019-09-03 19:56:53,884 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2924 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=6011, Invalid=17551, Unknown=0, NotChecked=0, Total=23562 [2019-09-03 19:56:53,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-09-03 19:56:53,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2019-09-03 19:56:53,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2019-09-03 19:56:53,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 164 transitions. [2019-09-03 19:56:53,891 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 164 transitions. Word has length 155 [2019-09-03 19:56:53,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:56:53,892 INFO L475 AbstractCegarLoop]: Abstraction has 164 states and 164 transitions. [2019-09-03 19:56:53,892 INFO L476 AbstractCegarLoop]: Interpolant automaton has 79 states. [2019-09-03 19:56:53,892 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 164 transitions. [2019-09-03 19:56:53,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-09-03 19:56:53,893 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:56:53,893 INFO L399 BasicCegarLoop]: trace histogram [76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:56:53,893 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:56:53,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:56:53,894 INFO L82 PathProgramCache]: Analyzing trace with hash -602884761, now seen corresponding path program 20 times [2019-09-03 19:56:53,894 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:56:53,894 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:56:53,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:53,894 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:56:53,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:56:54,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:56:59,474 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:56:59,475 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:56:59,475 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2019-09-03 19:56:59,487 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 19:56:59,887 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 19:56:59,888 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:57:00,126 INFO L256 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 79 conjunts are in the unsatisfiable core [2019-09-03 19:57:00,128 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:57:00,402 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:57:00,405 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:57:00,405 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 83 [2019-09-03 19:57:00,405 INFO L454 AbstractCegarLoop]: Interpolant automaton has 83 states [2019-09-03 19:57:00,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2019-09-03 19:57:00,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=6636, Unknown=0, NotChecked=0, Total=6806 [2019-09-03 19:57:00,406 INFO L87 Difference]: Start difference. First operand 164 states and 164 transitions. Second operand 83 states. [2019-09-03 19:57:00,707 WARN L188 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 8 [2019-09-03 19:57:00,934 WARN L188 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 8 [2019-09-03 19:57:01,171 WARN L188 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 9 [2019-09-03 19:57:01,409 WARN L188 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2019-09-03 19:57:01,654 WARN L188 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2019-09-03 19:57:01,903 WARN L188 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2019-09-03 19:57:02,154 WARN L188 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2019-09-03 19:57:02,414 WARN L188 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2019-09-03 19:57:02,682 WARN L188 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2019-09-03 19:57:02,943 WARN L188 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2019-09-03 19:57:03,200 WARN L188 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2019-09-03 19:57:03,464 WARN L188 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2019-09-03 19:57:03,732 WARN L188 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2019-09-03 19:57:03,991 WARN L188 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2019-09-03 19:57:04,255 WARN L188 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2019-09-03 19:57:04,524 WARN L188 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2019-09-03 19:57:04,782 WARN L188 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2019-09-03 19:57:05,072 WARN L188 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2019-09-03 19:57:05,334 WARN L188 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2019-09-03 19:57:05,604 WARN L188 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2019-09-03 19:57:05,880 WARN L188 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2019-09-03 19:57:06,148 WARN L188 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2019-09-03 19:57:06,424 WARN L188 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2019-09-03 19:57:06,694 WARN L188 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2019-09-03 19:57:06,967 WARN L188 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2019-09-03 19:57:07,237 WARN L188 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2019-09-03 19:57:07,525 WARN L188 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2019-09-03 19:57:07,799 WARN L188 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-03 19:57:08,060 WARN L188 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-03 19:57:08,317 WARN L188 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-03 19:57:08,573 WARN L188 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-03 19:57:08,832 WARN L188 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-03 19:57:09,084 WARN L188 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2019-09-03 19:57:09,614 WARN L188 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2019-09-03 19:57:18,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:57:18,274 INFO L93 Difference]: Finished difference Result 177 states and 180 transitions. [2019-09-03 19:57:18,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2019-09-03 19:57:18,277 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 163 [2019-09-03 19:57:18,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:57:18,278 INFO L225 Difference]: With dead ends: 177 [2019-09-03 19:57:18,278 INFO L226 Difference]: Without dead ends: 172 [2019-09-03 19:57:18,279 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3238 ImplicationChecksByTransitivity, 22.7s TimeCoverageRelationStatistics Valid=6647, Invalid=19435, Unknown=0, NotChecked=0, Total=26082 [2019-09-03 19:57:18,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-09-03 19:57:18,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2019-09-03 19:57:18,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2019-09-03 19:57:18,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 172 transitions. [2019-09-03 19:57:18,287 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 172 transitions. Word has length 163 [2019-09-03 19:57:18,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:57:18,287 INFO L475 AbstractCegarLoop]: Abstraction has 172 states and 172 transitions. [2019-09-03 19:57:18,287 INFO L476 AbstractCegarLoop]: Interpolant automaton has 83 states. [2019-09-03 19:57:18,287 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 172 transitions. [2019-09-03 19:57:18,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-09-03 19:57:18,288 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:57:18,288 INFO L399 BasicCegarLoop]: trace histogram [80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:57:18,289 INFO L418 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:57:18,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:57:18,289 INFO L82 PathProgramCache]: Analyzing trace with hash -487104673, now seen corresponding path program 21 times [2019-09-03 19:57:18,289 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:57:18,289 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:57:18,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:57:18,290 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:57:18,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:57:18,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:57:22,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 0 proven. 6400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:57:22,493 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:57:22,493 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2019-09-03 19:57:22,505 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 19:57:22,625 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 81 check-sat command(s) [2019-09-03 19:57:22,626 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:57:22,630 INFO L256 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 83 conjunts are in the unsatisfiable core [2019-09-03 19:57:22,633 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:57:22,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 0 proven. 6400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:57:22,934 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:57:22,934 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 87 [2019-09-03 19:57:22,935 INFO L454 AbstractCegarLoop]: Interpolant automaton has 87 states [2019-09-03 19:57:22,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2019-09-03 19:57:22,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=7304, Unknown=0, NotChecked=0, Total=7482 [2019-09-03 19:57:22,936 INFO L87 Difference]: Start difference. First operand 172 states and 172 transitions. Second operand 87 states. [2019-09-03 19:57:23,263 WARN L188 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 8 [2019-09-03 19:57:23,501 WARN L188 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 8 [2019-09-03 19:57:23,760 WARN L188 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 9 [2019-09-03 19:57:24,021 WARN L188 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2019-09-03 19:57:24,291 WARN L188 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2019-09-03 19:57:24,563 WARN L188 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2019-09-03 19:57:24,837 WARN L188 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2019-09-03 19:57:25,104 WARN L188 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2019-09-03 19:57:25,387 WARN L188 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2019-09-03 19:57:25,661 WARN L188 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2019-09-03 19:57:25,944 WARN L188 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2019-09-03 19:57:26,231 WARN L188 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2019-09-03 19:57:26,513 WARN L188 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2019-09-03 19:57:26,803 WARN L188 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2019-09-03 19:57:27,088 WARN L188 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2019-09-03 19:57:27,377 WARN L188 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2019-09-03 19:57:27,664 WARN L188 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2019-09-03 19:57:27,955 WARN L188 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2019-09-03 19:57:28,249 WARN L188 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2019-09-03 19:57:28,541 WARN L188 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2019-09-03 19:57:28,828 WARN L188 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2019-09-03 19:57:29,128 WARN L188 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2019-09-03 19:57:29,422 WARN L188 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2019-09-03 19:57:29,710 WARN L188 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2019-09-03 19:57:30,007 WARN L188 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2019-09-03 19:57:30,305 WARN L188 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2019-09-03 19:57:30,599 WARN L188 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2019-09-03 19:57:30,889 WARN L188 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2019-09-03 19:57:31,183 WARN L188 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2019-09-03 19:57:31,479 WARN L188 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2019-09-03 19:57:31,766 WARN L188 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2019-09-03 19:57:32,063 WARN L188 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-03 19:57:32,349 WARN L188 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-03 19:57:32,627 WARN L188 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-03 19:57:32,905 WARN L188 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-03 19:57:33,181 WARN L188 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-03 19:57:33,460 WARN L188 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2019-09-03 19:57:34,296 WARN L188 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 11 [2019-09-03 19:57:42,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:57:42,910 INFO L93 Difference]: Finished difference Result 185 states and 188 transitions. [2019-09-03 19:57:42,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2019-09-03 19:57:42,911 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 171 [2019-09-03 19:57:42,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:57:42,912 INFO L225 Difference]: With dead ends: 185 [2019-09-03 19:57:42,912 INFO L226 Difference]: Without dead ends: 180 [2019-09-03 19:57:42,913 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3568 ImplicationChecksByTransitivity, 23.4s TimeCoverageRelationStatistics Valid=7315, Invalid=21415, Unknown=0, NotChecked=0, Total=28730 [2019-09-03 19:57:42,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2019-09-03 19:57:42,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2019-09-03 19:57:42,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2019-09-03 19:57:42,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 180 transitions. [2019-09-03 19:57:42,921 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 180 transitions. Word has length 171 [2019-09-03 19:57:42,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:57:42,921 INFO L475 AbstractCegarLoop]: Abstraction has 180 states and 180 transitions. [2019-09-03 19:57:42,921 INFO L476 AbstractCegarLoop]: Interpolant automaton has 87 states. [2019-09-03 19:57:42,921 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 180 transitions. [2019-09-03 19:57:42,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-09-03 19:57:42,922 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:57:42,923 INFO L399 BasicCegarLoop]: trace histogram [84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:57:42,923 INFO L418 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:57:42,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:57:42,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1936757079, now seen corresponding path program 22 times [2019-09-03 19:57:42,923 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:57:42,924 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:57:42,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:57:42,924 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:57:42,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:57:43,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:57:46,737 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:57:46,737 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:57:46,737 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2019-09-03 19:57:46,752 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 19:57:47,034 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 19:57:47,034 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:57:47,182 INFO L256 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 87 conjunts are in the unsatisfiable core [2019-09-03 19:57:47,185 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:57:47,497 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (23)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 19:57:47,501 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:57:47,501 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 91 [2019-09-03 19:57:47,502 INFO L454 AbstractCegarLoop]: Interpolant automaton has 91 states [2019-09-03 19:57:47,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2019-09-03 19:57:47,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=8004, Unknown=0, NotChecked=0, Total=8190 [2019-09-03 19:57:47,503 INFO L87 Difference]: Start difference. First operand 180 states and 180 transitions. Second operand 91 states. [2019-09-03 19:57:47,846 WARN L188 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 8 [2019-09-03 19:57:48,100 WARN L188 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 8 [2019-09-03 19:57:48,373 WARN L188 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 9 [2019-09-03 19:57:48,650 WARN L188 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2019-09-03 19:57:48,935 WARN L188 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2019-09-03 19:57:49,233 WARN L188 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2019-09-03 19:57:49,527 WARN L188 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2019-09-03 19:57:49,828 WARN L188 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2019-09-03 19:57:50,131 WARN L188 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2019-09-03 19:57:50,433 WARN L188 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2019-09-03 19:57:50,739 WARN L188 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2019-09-03 19:57:51,062 WARN L188 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2019-09-03 19:57:51,371 WARN L188 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2019-09-03 19:57:51,682 WARN L188 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2019-09-03 19:57:51,983 WARN L188 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2019-09-03 19:57:52,300 WARN L188 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2019-09-03 19:57:52,609 WARN L188 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2019-09-03 19:57:52,925 WARN L188 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2019-09-03 19:57:53,250 WARN L188 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2019-09-03 19:57:53,568 WARN L188 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2019-09-03 19:57:53,887 WARN L188 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2019-09-03 19:57:54,208 WARN L188 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2019-09-03 19:57:54,528 WARN L188 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2019-09-03 19:57:54,844 WARN L188 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2019-09-03 19:57:55,166 WARN L188 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2019-09-03 19:57:55,492 WARN L188 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2019-09-03 19:57:55,816 WARN L188 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2019-09-03 19:57:56,135 WARN L188 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2019-09-03 19:57:56,449 WARN L188 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2019-09-03 19:57:56,767 WARN L188 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2019-09-03 19:57:57,077 WARN L188 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2019-09-03 19:57:57,383 WARN L188 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2019-09-03 19:57:57,689 WARN L188 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2019-09-03 19:57:58,003 WARN L188 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2019-09-03 19:57:58,327 WARN L188 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2019-09-03 19:57:58,636 WARN L188 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-03 19:57:58,939 WARN L188 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-03 19:57:59,233 WARN L188 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-03 19:57:59,522 WARN L188 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-03 19:57:59,816 WARN L188 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-03 19:58:00,109 WARN L188 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2019-09-03 19:58:00,401 WARN L188 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2019-09-03 19:58:00,692 WARN L188 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2019-09-03 19:58:10,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:58:10,164 INFO L93 Difference]: Finished difference Result 193 states and 196 transitions. [2019-09-03 19:58:10,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2019-09-03 19:58:10,164 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 179 [2019-09-03 19:58:10,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:58:10,165 INFO L225 Difference]: With dead ends: 193 [2019-09-03 19:58:10,165 INFO L226 Difference]: Without dead ends: 188 [2019-09-03 19:58:10,166 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3914 ImplicationChecksByTransitivity, 25.6s TimeCoverageRelationStatistics Valid=8015, Invalid=23491, Unknown=0, NotChecked=0, Total=31506 [2019-09-03 19:58:10,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2019-09-03 19:58:10,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2019-09-03 19:58:10,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2019-09-03 19:58:10,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 188 transitions. [2019-09-03 19:58:10,174 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 188 transitions. Word has length 179 [2019-09-03 19:58:10,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:58:10,174 INFO L475 AbstractCegarLoop]: Abstraction has 188 states and 188 transitions. [2019-09-03 19:58:10,174 INFO L476 AbstractCegarLoop]: Interpolant automaton has 91 states. [2019-09-03 19:58:10,174 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 188 transitions. [2019-09-03 19:58:10,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-09-03 19:58:10,175 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:58:10,176 INFO L399 BasicCegarLoop]: trace histogram [88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:58:10,176 INFO L418 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:58:10,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:58:10,176 INFO L82 PathProgramCache]: Analyzing trace with hash 913591119, now seen corresponding path program 23 times [2019-09-03 19:58:10,176 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:58:10,177 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:58:10,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:58:10,177 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:58:10,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:58:10,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:58:14,737 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:58:14,737 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:58:14,737 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2019-09-03 19:58:14,746 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 19:58:15,279 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 89 check-sat command(s) [2019-09-03 19:58:15,279 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:58:15,308 INFO L256 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 91 conjunts are in the unsatisfiable core [2019-09-03 19:58:15,311 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:58:15,836 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:58:15,842 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:58:15,843 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 95 [2019-09-03 19:58:15,844 INFO L454 AbstractCegarLoop]: Interpolant automaton has 95 states [2019-09-03 19:58:15,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2019-09-03 19:58:15,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=8736, Unknown=0, NotChecked=0, Total=8930 [2019-09-03 19:58:15,845 INFO L87 Difference]: Start difference. First operand 188 states and 188 transitions. Second operand 95 states. [2019-09-03 19:58:16,246 WARN L188 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 8 [2019-09-03 19:58:16,530 WARN L188 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 8 [2019-09-03 19:58:16,839 WARN L188 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 9 [2019-09-03 19:58:17,143 WARN L188 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2019-09-03 19:58:17,457 WARN L188 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2019-09-03 19:58:17,779 WARN L188 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2019-09-03 19:58:18,095 WARN L188 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2019-09-03 19:58:18,434 WARN L188 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2019-09-03 19:58:18,757 WARN L188 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2019-09-03 19:58:19,088 WARN L188 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2019-09-03 19:58:19,419 WARN L188 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2019-09-03 19:58:19,749 WARN L188 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2019-09-03 19:58:20,097 WARN L188 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2019-09-03 19:58:20,427 WARN L188 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2019-09-03 19:58:20,766 WARN L188 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2019-09-03 19:58:21,101 WARN L188 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2019-09-03 19:58:21,425 WARN L188 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2019-09-03 19:58:21,769 WARN L188 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2019-09-03 19:58:22,111 WARN L188 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2019-09-03 19:58:22,471 WARN L188 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2019-09-03 19:58:22,822 WARN L188 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2019-09-03 19:58:23,167 WARN L188 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2019-09-03 19:58:23,524 WARN L188 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2019-09-03 19:58:23,865 WARN L188 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2019-09-03 19:58:24,209 WARN L188 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2019-09-03 19:58:24,561 WARN L188 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2019-09-03 19:58:24,907 WARN L188 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2019-09-03 19:58:25,253 WARN L188 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2019-09-03 19:58:25,597 WARN L188 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2019-09-03 19:58:25,942 WARN L188 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2019-09-03 19:58:26,282 WARN L188 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2019-09-03 19:58:26,621 WARN L188 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2019-09-03 19:58:26,965 WARN L188 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2019-09-03 19:58:27,300 WARN L188 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2019-09-03 19:58:27,637 WARN L188 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2019-09-03 19:58:27,982 WARN L188 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2019-09-03 19:58:28,323 WARN L188 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2019-09-03 19:58:28,656 WARN L188 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2019-09-03 19:58:28,984 WARN L188 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2019-09-03 19:58:29,325 WARN L188 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-03 19:58:29,644 WARN L188 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-03 19:58:29,963 WARN L188 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-03 19:58:30,283 WARN L188 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-03 19:58:30,598 WARN L188 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-03 19:58:30,911 WARN L188 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2019-09-03 19:58:31,220 WARN L188 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2019-09-03 19:58:31,532 WARN L188 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2019-09-03 19:58:41,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:58:41,538 INFO L93 Difference]: Finished difference Result 201 states and 204 transitions. [2019-09-03 19:58:41,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2019-09-03 19:58:41,539 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 187 [2019-09-03 19:58:41,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:58:41,540 INFO L225 Difference]: With dead ends: 201 [2019-09-03 19:58:41,540 INFO L226 Difference]: Without dead ends: 196 [2019-09-03 19:58:41,541 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4276 ImplicationChecksByTransitivity, 29.5s TimeCoverageRelationStatistics Valid=8747, Invalid=25663, Unknown=0, NotChecked=0, Total=34410 [2019-09-03 19:58:41,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2019-09-03 19:58:41,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2019-09-03 19:58:41,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2019-09-03 19:58:41,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 196 transitions. [2019-09-03 19:58:41,561 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 196 transitions. Word has length 187 [2019-09-03 19:58:41,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:58:41,561 INFO L475 AbstractCegarLoop]: Abstraction has 196 states and 196 transitions. [2019-09-03 19:58:41,562 INFO L476 AbstractCegarLoop]: Interpolant automaton has 95 states. [2019-09-03 19:58:41,562 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 196 transitions. [2019-09-03 19:58:41,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2019-09-03 19:58:41,563 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:58:41,563 INFO L399 BasicCegarLoop]: trace histogram [92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:58:41,563 INFO L418 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:58:41,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:58:41,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1559924039, now seen corresponding path program 24 times [2019-09-03 19:58:41,563 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:58:41,563 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:58:41,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:58:41,564 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:58:41,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:58:42,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:58:46,426 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 0 proven. 8464 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:58:46,427 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:58:46,427 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2019-09-03 19:58:46,438 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 19:58:46,584 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 93 check-sat command(s) [2019-09-03 19:58:46,584 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:58:46,590 INFO L256 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 95 conjunts are in the unsatisfiable core [2019-09-03 19:58:46,593 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:58:46,943 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 0 proven. 8464 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:58:46,947 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:58:46,947 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 99 [2019-09-03 19:58:46,948 INFO L454 AbstractCegarLoop]: Interpolant automaton has 99 states [2019-09-03 19:58:46,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2019-09-03 19:58:46,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=9500, Unknown=0, NotChecked=0, Total=9702 [2019-09-03 19:58:46,949 INFO L87 Difference]: Start difference. First operand 196 states and 196 transitions. Second operand 99 states. [2019-09-03 19:58:47,337 WARN L188 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 8 [2019-09-03 19:58:47,642 WARN L188 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 8 [2019-09-03 19:58:47,966 WARN L188 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 285 DAG size of output: 9 [2019-09-03 19:58:48,293 WARN L188 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 11 [2019-09-03 19:58:48,626 WARN L188 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 11 [2019-09-03 19:58:48,969 WARN L188 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 11 [2019-09-03 19:58:49,306 WARN L188 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 11 [2019-09-03 19:58:49,657 WARN L188 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2019-09-03 19:58:50,008 WARN L188 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2019-09-03 19:58:50,360 WARN L188 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2019-09-03 19:58:50,728 WARN L188 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2019-09-03 19:58:51,083 WARN L188 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2019-09-03 19:58:51,444 WARN L188 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2019-09-03 19:58:51,807 WARN L188 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2019-09-03 19:58:52,170 WARN L188 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2019-09-03 19:58:52,542 WARN L188 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2019-09-03 19:58:52,894 WARN L188 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2019-09-03 19:58:53,261 WARN L188 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2019-09-03 19:58:53,624 WARN L188 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2019-09-03 19:58:53,987 WARN L188 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2019-09-03 19:58:54,362 WARN L188 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2019-09-03 19:58:54,740 WARN L188 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2019-09-03 19:58:55,109 WARN L188 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2019-09-03 19:58:55,477 WARN L188 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2019-09-03 19:58:55,856 WARN L188 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2019-09-03 19:58:56,224 WARN L188 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2019-09-03 19:58:56,604 WARN L188 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2019-09-03 19:58:56,990 WARN L188 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2019-09-03 19:58:57,364 WARN L188 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2019-09-03 19:58:57,738 WARN L188 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2019-09-03 19:58:58,096 WARN L188 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2019-09-03 19:58:58,475 WARN L188 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2019-09-03 19:58:58,845 WARN L188 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2019-09-03 19:58:59,222 WARN L188 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2019-09-03 19:58:59,592 WARN L188 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2019-09-03 19:58:59,947 WARN L188 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2019-09-03 19:59:00,316 WARN L188 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2019-09-03 19:59:00,669 WARN L188 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2019-09-03 19:59:01,027 WARN L188 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2019-09-03 19:59:01,383 WARN L188 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2019-09-03 19:59:01,745 WARN L188 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2019-09-03 19:59:02,094 WARN L188 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2019-09-03 19:59:02,437 WARN L188 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2019-09-03 19:59:02,805 WARN L188 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-03 19:59:03,161 WARN L188 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-03 19:59:03,515 WARN L188 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-03 19:59:03,864 WARN L188 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-03 19:59:04,213 WARN L188 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-03 19:59:04,552 WARN L188 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2019-09-03 19:59:04,883 WARN L188 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2019-09-03 19:59:05,216 WARN L188 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2019-09-03 19:59:15,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:59:15,680 INFO L93 Difference]: Finished difference Result 209 states and 212 transitions. [2019-09-03 19:59:15,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2019-09-03 19:59:15,681 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 195 [2019-09-03 19:59:15,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:59:15,682 INFO L225 Difference]: With dead ends: 209 [2019-09-03 19:59:15,682 INFO L226 Difference]: Without dead ends: 204 [2019-09-03 19:59:15,683 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4654 ImplicationChecksByTransitivity, 32.3s TimeCoverageRelationStatistics Valid=9511, Invalid=27931, Unknown=0, NotChecked=0, Total=37442 [2019-09-03 19:59:15,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2019-09-03 19:59:15,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2019-09-03 19:59:15,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2019-09-03 19:59:15,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 204 transitions. [2019-09-03 19:59:15,690 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 204 transitions. Word has length 195 [2019-09-03 19:59:15,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:59:15,691 INFO L475 AbstractCegarLoop]: Abstraction has 204 states and 204 transitions. [2019-09-03 19:59:15,691 INFO L476 AbstractCegarLoop]: Interpolant automaton has 99 states. [2019-09-03 19:59:15,691 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 204 transitions. [2019-09-03 19:59:15,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2019-09-03 19:59:15,692 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:59:15,692 INFO L399 BasicCegarLoop]: trace histogram [96, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:59:15,693 INFO L418 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:59:15,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:59:15,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1610918081, now seen corresponding path program 25 times [2019-09-03 19:59:15,693 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:59:15,693 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:59:15,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:59:15,694 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:59:15,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:59:16,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:59:20,935 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 0 proven. 9216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:59:20,935 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:59:20,936 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2019-09-03 19:59:20,945 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:59:21,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:59:22,387 INFO L256 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 99 conjunts are in the unsatisfiable core [2019-09-03 19:59:22,390 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:59:22,759 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 0 proven. 9216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:59:22,762 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:59:22,762 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 103 [2019-09-03 19:59:22,763 INFO L454 AbstractCegarLoop]: Interpolant automaton has 103 states [2019-09-03 19:59:22,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2019-09-03 19:59:22,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=10296, Unknown=0, NotChecked=0, Total=10506 [2019-09-03 19:59:22,764 INFO L87 Difference]: Start difference. First operand 204 states and 204 transitions. Second operand 103 states. [2019-09-03 19:59:23,219 WARN L188 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 8 [2019-09-03 19:59:23,547 WARN L188 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 8 [2019-09-03 19:59:23,897 WARN L188 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 9 [2019-09-03 19:59:24,255 WARN L188 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 11 [2019-09-03 19:59:24,608 WARN L188 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 11 [2019-09-03 19:59:24,971 WARN L188 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 11 [2019-09-03 19:59:25,322 WARN L188 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 11 [2019-09-03 19:59:25,698 WARN L188 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 11 [2019-09-03 19:59:26,075 WARN L188 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 11 [2019-09-03 19:59:26,452 WARN L188 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 11 [2019-09-03 19:59:26,821 WARN L188 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 11 [2019-09-03 19:59:27,199 WARN L188 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2019-09-03 19:59:27,590 WARN L188 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2019-09-03 19:59:27,978 WARN L188 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2019-09-03 19:59:28,364 WARN L188 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2019-09-03 19:59:28,756 WARN L188 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2019-09-03 19:59:29,143 WARN L188 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2019-09-03 19:59:29,542 WARN L188 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2019-09-03 19:59:29,933 WARN L188 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2019-09-03 19:59:30,327 WARN L188 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2019-09-03 19:59:30,715 WARN L188 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2019-09-03 19:59:31,113 WARN L188 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2019-09-03 19:59:31,498 WARN L188 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2019-09-03 19:59:31,904 WARN L188 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2019-09-03 19:59:32,304 WARN L188 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2019-09-03 19:59:32,700 WARN L188 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2019-09-03 19:59:33,106 WARN L188 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2019-09-03 19:59:33,496 WARN L188 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2019-09-03 19:59:33,900 WARN L188 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2019-09-03 19:59:34,294 WARN L188 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2019-09-03 19:59:34,689 WARN L188 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2019-09-03 19:59:35,085 WARN L188 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2019-09-03 19:59:35,484 WARN L188 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2019-09-03 19:59:35,874 WARN L188 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2019-09-03 19:59:36,283 WARN L188 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2019-09-03 19:59:36,667 WARN L188 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2019-09-03 19:59:37,065 WARN L188 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2019-09-03 19:59:37,458 WARN L188 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2019-09-03 19:59:37,847 WARN L188 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2019-09-03 19:59:38,239 WARN L188 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2019-09-03 19:59:38,621 WARN L188 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2019-09-03 19:59:38,998 WARN L188 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2019-09-03 19:59:39,390 WARN L188 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2019-09-03 19:59:39,782 WARN L188 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2019-09-03 19:59:40,167 WARN L188 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2019-09-03 19:59:40,561 WARN L188 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2019-09-03 19:59:40,956 WARN L188 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2019-09-03 19:59:41,353 WARN L188 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-03 19:59:41,746 WARN L188 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-03 19:59:42,115 WARN L188 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-03 19:59:42,476 WARN L188 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-03 19:59:42,835 WARN L188 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-03 19:59:43,334 WARN L188 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2019-09-03 19:59:43,700 WARN L188 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2019-09-03 19:59:54,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:59:54,953 INFO L93 Difference]: Finished difference Result 217 states and 220 transitions. [2019-09-03 19:59:54,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2019-09-03 19:59:54,953 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 203 [2019-09-03 19:59:54,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:59:54,955 INFO L225 Difference]: With dead ends: 217 [2019-09-03 19:59:54,955 INFO L226 Difference]: Without dead ends: 212 [2019-09-03 19:59:54,956 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5048 ImplicationChecksByTransitivity, 36.3s TimeCoverageRelationStatistics Valid=10307, Invalid=30295, Unknown=0, NotChecked=0, Total=40602 [2019-09-03 19:59:54,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2019-09-03 19:59:54,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2019-09-03 19:59:54,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2019-09-03 19:59:54,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 212 transitions. [2019-09-03 19:59:54,964 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 212 transitions. Word has length 203 [2019-09-03 19:59:54,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:59:54,965 INFO L475 AbstractCegarLoop]: Abstraction has 212 states and 212 transitions. [2019-09-03 19:59:54,965 INFO L476 AbstractCegarLoop]: Interpolant automaton has 103 states. [2019-09-03 19:59:54,965 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 212 transitions. [2019-09-03 19:59:54,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2019-09-03 19:59:54,966 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:59:54,967 INFO L399 BasicCegarLoop]: trace histogram [100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:59:54,967 INFO L418 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:59:54,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:59:54,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1080994103, now seen corresponding path program 26 times [2019-09-03 19:59:54,967 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:59:54,967 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:59:54,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:59:54,968 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:59:54,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:59:56,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:00:00,893 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 0 proven. 10000 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:00:00,893 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:00:00,893 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2019-09-03 20:00:00,910 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:00:01,895 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:00:01,895 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:00:02,466 INFO L256 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 103 conjunts are in the unsatisfiable core [2019-09-03 20:00:02,468 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:00:02,825 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 0 proven. 10000 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:00:02,829 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:00:02,829 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 107 [2019-09-03 20:00:02,829 INFO L454 AbstractCegarLoop]: Interpolant automaton has 107 states [2019-09-03 20:00:02,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2019-09-03 20:00:02,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=11124, Unknown=0, NotChecked=0, Total=11342 [2019-09-03 20:00:02,830 INFO L87 Difference]: Start difference. First operand 212 states and 212 transitions. Second operand 107 states. [2019-09-03 20:00:03,264 WARN L188 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 8 [2019-09-03 20:00:03,623 WARN L188 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 8 [2019-09-03 20:00:03,992 WARN L188 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 309 DAG size of output: 9 [2019-09-03 20:00:04,357 WARN L188 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 11 [2019-09-03 20:00:04,743 WARN L188 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 11 [2019-09-03 20:00:05,140 WARN L188 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 11 [2019-09-03 20:00:05,520 WARN L188 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 11 [2019-09-03 20:00:05,909 WARN L188 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 11 [2019-09-03 20:00:06,313 WARN L188 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 11 [2019-09-03 20:00:06,717 WARN L188 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 11 [2019-09-03 20:00:07,121 WARN L188 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 11 [2019-09-03 20:00:07,518 WARN L188 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 11 [2019-09-03 20:00:07,918 WARN L188 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 11 [2019-09-03 20:00:08,336 WARN L188 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 11 [2019-09-03 20:00:08,753 WARN L188 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 11 [2019-09-03 20:00:09,169 WARN L188 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2019-09-03 20:00:09,583 WARN L188 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2019-09-03 20:00:09,999 WARN L188 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2019-09-03 20:00:10,416 WARN L188 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2019-09-03 20:00:10,845 WARN L188 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2019-09-03 20:00:11,273 WARN L188 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2019-09-03 20:00:11,696 WARN L188 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2019-09-03 20:00:12,116 WARN L188 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2019-09-03 20:00:12,546 WARN L188 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2019-09-03 20:00:12,986 WARN L188 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2019-09-03 20:00:13,423 WARN L188 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2019-09-03 20:00:13,850 WARN L188 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2019-09-03 20:00:14,272 WARN L188 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2019-09-03 20:00:14,685 WARN L188 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2019-09-03 20:00:15,117 WARN L188 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2019-09-03 20:00:15,556 WARN L188 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2019-09-03 20:00:15,980 WARN L188 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2019-09-03 20:00:16,403 WARN L188 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2019-09-03 20:00:16,820 WARN L188 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2019-09-03 20:00:17,231 WARN L188 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2019-09-03 20:00:17,646 WARN L188 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2019-09-03 20:00:18,083 WARN L188 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2019-09-03 20:00:18,500 WARN L188 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2019-09-03 20:00:18,917 WARN L188 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2019-09-03 20:00:19,324 WARN L188 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2019-09-03 20:00:19,731 WARN L188 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2019-09-03 20:00:20,151 WARN L188 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2019-09-03 20:00:20,566 WARN L188 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2019-09-03 20:00:20,999 WARN L188 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2019-09-03 20:00:21,408 WARN L188 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2019-09-03 20:00:21,837 WARN L188 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2019-09-03 20:00:22,258 WARN L188 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2019-09-03 20:00:22,681 WARN L188 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2019-09-03 20:00:23,096 WARN L188 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2019-09-03 20:00:23,501 WARN L188 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2019-09-03 20:00:23,900 WARN L188 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2019-09-03 20:00:24,314 WARN L188 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-03 20:00:24,725 WARN L188 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-03 20:00:25,110 WARN L188 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-03 20:00:25,482 WARN L188 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-03 20:00:25,863 WARN L188 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-03 20:00:26,240 WARN L188 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2019-09-03 20:00:26,620 WARN L188 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2019-09-03 20:00:26,994 WARN L188 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2019-09-03 20:00:38,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:00:38,348 INFO L93 Difference]: Finished difference Result 225 states and 228 transitions. [2019-09-03 20:00:38,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2019-09-03 20:00:38,349 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 211 [2019-09-03 20:00:38,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:00:38,350 INFO L225 Difference]: With dead ends: 225 [2019-09-03 20:00:38,350 INFO L226 Difference]: Without dead ends: 220 [2019-09-03 20:00:38,352 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5458 ImplicationChecksByTransitivity, 39.7s TimeCoverageRelationStatistics Valid=11135, Invalid=32755, Unknown=0, NotChecked=0, Total=43890 [2019-09-03 20:00:38,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2019-09-03 20:00:38,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2019-09-03 20:00:38,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2019-09-03 20:00:38,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 220 transitions. [2019-09-03 20:00:38,360 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 220 transitions. Word has length 211 [2019-09-03 20:00:38,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:00:38,361 INFO L475 AbstractCegarLoop]: Abstraction has 220 states and 220 transitions. [2019-09-03 20:00:38,361 INFO L476 AbstractCegarLoop]: Interpolant automaton has 107 states. [2019-09-03 20:00:38,361 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 220 transitions. [2019-09-03 20:00:38,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2019-09-03 20:00:38,362 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:00:38,362 INFO L399 BasicCegarLoop]: trace histogram [104, 104, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:00:38,362 INFO L418 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:00:38,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:00:38,363 INFO L82 PathProgramCache]: Analyzing trace with hash 122454831, now seen corresponding path program 27 times [2019-09-03 20:00:38,363 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:00:38,363 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:00:38,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:00:38,364 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:00:38,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:00:39,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:00:44,206 INFO L134 CoverageAnalysis]: Checked inductivity of 10816 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:00:44,206 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:00:44,206 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2019-09-03 20:00:44,219 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:00:44,407 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 105 check-sat command(s) [2019-09-03 20:00:44,408 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:00:44,413 INFO L256 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 107 conjunts are in the unsatisfiable core [2019-09-03 20:00:44,416 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:00:44,781 INFO L134 CoverageAnalysis]: Checked inductivity of 10816 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:00:44,784 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:00:44,784 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 111 [2019-09-03 20:00:44,785 INFO L454 AbstractCegarLoop]: Interpolant automaton has 111 states [2019-09-03 20:00:44,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2019-09-03 20:00:44,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=11984, Unknown=0, NotChecked=0, Total=12210 [2019-09-03 20:00:44,786 INFO L87 Difference]: Start difference. First operand 220 states and 220 transitions. Second operand 111 states. [2019-09-03 20:00:45,258 WARN L188 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 8 [2019-09-03 20:00:45,630 WARN L188 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 8 [2019-09-03 20:00:46,024 WARN L188 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 9 [2019-09-03 20:00:46,418 WARN L188 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 11 [2019-09-03 20:00:46,825 WARN L188 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 11 [2019-09-03 20:00:47,256 WARN L188 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 11 [2019-09-03 20:00:47,661 WARN L188 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 11 [2019-09-03 20:00:48,080 WARN L188 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 11 [2019-09-03 20:00:48,501 WARN L188 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 11 [2019-09-03 20:00:48,926 WARN L188 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 11 [2019-09-03 20:00:49,368 WARN L188 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 11 [2019-09-03 20:00:49,801 WARN L188 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 11 [2019-09-03 20:00:50,230 WARN L188 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 11 [2019-09-03 20:00:50,662 WARN L188 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 11 [2019-09-03 20:00:51,090 WARN L188 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 11 [2019-09-03 20:00:51,527 WARN L188 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 11 [2019-09-03 20:00:51,987 WARN L188 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 11 [2019-09-03 20:00:52,426 WARN L188 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 11 [2019-09-03 20:00:52,865 WARN L188 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 11 [2019-09-03 20:00:53,318 WARN L188 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2019-09-03 20:00:53,776 WARN L188 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2019-09-03 20:00:54,238 WARN L188 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2019-09-03 20:00:54,681 WARN L188 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2019-09-03 20:00:55,157 WARN L188 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2019-09-03 20:00:55,610 WARN L188 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2019-09-03 20:00:56,068 WARN L188 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2019-09-03 20:00:56,532 WARN L188 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2019-09-03 20:00:57,015 WARN L188 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2019-09-03 20:00:57,467 WARN L188 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2019-09-03 20:00:57,923 WARN L188 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2019-09-03 20:00:58,377 WARN L188 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2019-09-03 20:00:58,828 WARN L188 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2019-09-03 20:00:59,275 WARN L188 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2019-09-03 20:00:59,725 WARN L188 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2019-09-03 20:01:00,177 WARN L188 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2019-09-03 20:01:00,625 WARN L188 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2019-09-03 20:01:01,072 WARN L188 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2019-09-03 20:01:01,514 WARN L188 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2019-09-03 20:01:01,972 WARN L188 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2019-09-03 20:01:02,418 WARN L188 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2019-09-03 20:01:02,860 WARN L188 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2019-09-03 20:01:03,292 WARN L188 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2019-09-03 20:01:03,729 WARN L188 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2019-09-03 20:01:04,168 WARN L188 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2019-09-03 20:01:04,604 WARN L188 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2019-09-03 20:01:05,052 WARN L188 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2019-09-03 20:01:05,498 WARN L188 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2019-09-03 20:01:05,961 WARN L188 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2019-09-03 20:01:06,399 WARN L188 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2019-09-03 20:01:06,836 WARN L188 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2019-09-03 20:01:07,260 WARN L188 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2019-09-03 20:01:07,687 WARN L188 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2019-09-03 20:01:08,115 WARN L188 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2019-09-03 20:01:08,533 WARN L188 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2019-09-03 20:01:08,974 WARN L188 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2019-09-03 20:01:09,402 WARN L188 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-03 20:01:09,836 WARN L188 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-03 20:01:10,269 WARN L188 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-03 20:01:10,669 WARN L188 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-03 20:01:11,065 WARN L188 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-03 20:01:11,454 WARN L188 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2019-09-03 20:01:11,836 WARN L188 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2019-09-03 20:01:24,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:01:24,123 INFO L93 Difference]: Finished difference Result 233 states and 236 transitions. [2019-09-03 20:01:24,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2019-09-03 20:01:24,123 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 219 [2019-09-03 20:01:24,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:01:24,125 INFO L225 Difference]: With dead ends: 233 [2019-09-03 20:01:24,125 INFO L226 Difference]: Without dead ends: 228 [2019-09-03 20:01:24,127 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5884 ImplicationChecksByTransitivity, 43.9s TimeCoverageRelationStatistics Valid=11995, Invalid=35311, Unknown=0, NotChecked=0, Total=47306 [2019-09-03 20:01:24,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2019-09-03 20:01:24,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2019-09-03 20:01:24,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2019-09-03 20:01:24,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 228 transitions. [2019-09-03 20:01:24,136 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 228 transitions. Word has length 219 [2019-09-03 20:01:24,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:01:24,137 INFO L475 AbstractCegarLoop]: Abstraction has 228 states and 228 transitions. [2019-09-03 20:01:24,137 INFO L476 AbstractCegarLoop]: Interpolant automaton has 111 states. [2019-09-03 20:01:24,137 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 228 transitions. [2019-09-03 20:01:24,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2019-09-03 20:01:24,138 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:01:24,139 INFO L399 BasicCegarLoop]: trace histogram [108, 108, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:01:24,139 INFO L418 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:01:24,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:01:24,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1166861607, now seen corresponding path program 28 times [2019-09-03 20:01:24,139 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:01:24,139 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:01:24,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:24,140 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:01:24,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:01:24,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:01:30,395 INFO L134 CoverageAnalysis]: Checked inductivity of 11664 backedges. 0 proven. 11664 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:01:30,396 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:01:30,396 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2019-09-03 20:01:30,406 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:01:31,605 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:01:31,605 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:01:32,480 INFO L256 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 111 conjunts are in the unsatisfiable core [2019-09-03 20:01:32,484 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:01:32,905 INFO L134 CoverageAnalysis]: Checked inductivity of 11664 backedges. 0 proven. 11664 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:01:32,909 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:01:32,909 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112] total 115 [2019-09-03 20:01:32,909 INFO L454 AbstractCegarLoop]: Interpolant automaton has 115 states [2019-09-03 20:01:32,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2019-09-03 20:01:32,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=12876, Unknown=0, NotChecked=0, Total=13110 [2019-09-03 20:01:32,910 INFO L87 Difference]: Start difference. First operand 228 states and 228 transitions. Second operand 115 states. [2019-09-03 20:01:33,407 WARN L188 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 8 [2019-09-03 20:01:33,800 WARN L188 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 8 [2019-09-03 20:01:34,210 WARN L188 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 9 [2019-09-03 20:01:34,642 WARN L188 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 11 [2019-09-03 20:01:35,099 WARN L188 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 11 [2019-09-03 20:01:35,531 WARN L188 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 11 [2019-09-03 20:01:35,981 WARN L188 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 11 [2019-09-03 20:01:36,412 WARN L188 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 11 [2019-09-03 20:01:36,850 WARN L188 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 11 [2019-09-03 20:01:37,292 WARN L188 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 11 [2019-09-03 20:01:37,764 WARN L188 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 11 [2019-09-03 20:01:38,215 WARN L188 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 11 [2019-09-03 20:01:38,669 WARN L188 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 11 [2019-09-03 20:01:39,123 WARN L188 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 11 [2019-09-03 20:01:39,572 WARN L188 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 11 [2019-09-03 20:01:40,030 WARN L188 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 11 [2019-09-03 20:01:40,518 WARN L188 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 11 [2019-09-03 20:01:41,017 WARN L188 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 11 [2019-09-03 20:01:41,480 WARN L188 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 11 [2019-09-03 20:01:41,962 WARN L188 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 11 [2019-09-03 20:01:42,442 WARN L188 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 11 [2019-09-03 20:01:42,929 WARN L188 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 11 [2019-09-03 20:01:43,407 WARN L188 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 11 [2019-09-03 20:01:43,889 WARN L188 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2019-09-03 20:01:44,370 WARN L188 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2019-09-03 20:01:44,873 WARN L188 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2019-09-03 20:01:45,372 WARN L188 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2019-09-03 20:01:45,860 WARN L188 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2019-09-03 20:01:46,341 WARN L188 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2019-09-03 20:01:46,825 WARN L188 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2019-09-03 20:01:47,319 WARN L188 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2019-09-03 20:01:47,797 WARN L188 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2019-09-03 20:01:48,280 WARN L188 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2019-09-03 20:01:48,784 WARN L188 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2019-09-03 20:01:49,255 WARN L188 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2019-09-03 20:01:49,743 WARN L188 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2019-09-03 20:01:50,220 WARN L188 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2019-09-03 20:01:50,707 WARN L188 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2019-09-03 20:01:51,202 WARN L188 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2019-09-03 20:01:51,672 WARN L188 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2019-09-03 20:01:52,143 WARN L188 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2019-09-03 20:01:52,596 WARN L188 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2019-09-03 20:01:53,064 WARN L188 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2019-09-03 20:01:53,555 WARN L188 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2019-09-03 20:01:54,027 WARN L188 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2019-09-03 20:01:54,497 WARN L188 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2019-09-03 20:01:54,981 WARN L188 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2019-09-03 20:01:55,449 WARN L188 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2019-09-03 20:01:55,913 WARN L188 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2019-09-03 20:01:56,389 WARN L188 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2019-09-03 20:01:56,855 WARN L188 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2019-09-03 20:01:57,315 WARN L188 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2019-09-03 20:01:57,777 WARN L188 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2019-09-03 20:01:58,236 WARN L188 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2019-09-03 20:01:58,737 WARN L188 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2019-09-03 20:01:59,198 WARN L188 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2019-09-03 20:01:59,665 WARN L188 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2019-09-03 20:02:00,133 WARN L188 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2019-09-03 20:02:00,592 WARN L188 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2019-09-03 20:02:01,049 WARN L188 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-03 20:02:01,504 WARN L188 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-03 20:02:01,955 WARN L188 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-03 20:02:02,392 WARN L188 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-03 20:02:02,815 WARN L188 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-03 20:02:03,234 WARN L188 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2019-09-03 20:02:03,657 WARN L188 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2019-09-03 20:02:04,072 WARN L188 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2019-09-03 20:02:04,499 WARN L188 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 11 [2019-09-03 20:02:16,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:02:16,375 INFO L93 Difference]: Finished difference Result 241 states and 244 transitions. [2019-09-03 20:02:16,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2019-09-03 20:02:16,376 INFO L78 Accepts]: Start accepts. Automaton has 115 states. Word has length 227 [2019-09-03 20:02:16,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:02:16,378 INFO L225 Difference]: With dead ends: 241 [2019-09-03 20:02:16,378 INFO L226 Difference]: Without dead ends: 236 [2019-09-03 20:02:16,380 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6326 ImplicationChecksByTransitivity, 48.4s TimeCoverageRelationStatistics Valid=12887, Invalid=37963, Unknown=0, NotChecked=0, Total=50850 [2019-09-03 20:02:16,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2019-09-03 20:02:16,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2019-09-03 20:02:16,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2019-09-03 20:02:16,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 236 transitions. [2019-09-03 20:02:16,389 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 236 transitions. Word has length 227 [2019-09-03 20:02:16,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:02:16,390 INFO L475 AbstractCegarLoop]: Abstraction has 236 states and 236 transitions. [2019-09-03 20:02:16,390 INFO L476 AbstractCegarLoop]: Interpolant automaton has 115 states. [2019-09-03 20:02:16,390 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 236 transitions. [2019-09-03 20:02:16,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2019-09-03 20:02:16,391 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:02:16,391 INFO L399 BasicCegarLoop]: trace histogram [112, 112, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:02:16,392 INFO L418 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:02:16,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:02:16,392 INFO L82 PathProgramCache]: Analyzing trace with hash -735588577, now seen corresponding path program 29 times [2019-09-03 20:02:16,392 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:02:16,392 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:02:16,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:16,393 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:02:16,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:17,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:02:23,471 INFO L134 CoverageAnalysis]: Checked inductivity of 12544 backedges. 0 proven. 12544 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:02:23,471 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:02:23,471 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2019-09-03 20:02:23,481 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 20:02:24,516 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 113 check-sat command(s) [2019-09-03 20:02:24,517 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:02:24,571 INFO L256 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 115 conjunts are in the unsatisfiable core [2019-09-03 20:02:24,574 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:02:24,998 INFO L134 CoverageAnalysis]: Checked inductivity of 12544 backedges. 0 proven. 12544 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:02:25,002 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:02:25,003 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 116] total 119 [2019-09-03 20:02:25,004 INFO L454 AbstractCegarLoop]: Interpolant automaton has 119 states [2019-09-03 20:02:25,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2019-09-03 20:02:25,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=13800, Unknown=0, NotChecked=0, Total=14042 [2019-09-03 20:02:25,005 INFO L87 Difference]: Start difference. First operand 236 states and 236 transitions. Second operand 119 states. [2019-09-03 20:02:25,537 WARN L188 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 8 [2019-09-03 20:02:25,947 WARN L188 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 8 [2019-09-03 20:02:26,382 WARN L188 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 9 [2019-09-03 20:02:26,808 WARN L188 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 11 [2019-09-03 20:02:27,243 WARN L188 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 11 [2019-09-03 20:02:27,680 WARN L188 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 11 [2019-09-03 20:02:28,133 WARN L188 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 11 [2019-09-03 20:02:28,618 WARN L188 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 11 [2019-09-03 20:02:29,080 WARN L188 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 11 [2019-09-03 20:02:29,555 WARN L188 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 11 [2019-09-03 20:02:30,028 WARN L188 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 11 [2019-09-03 20:02:30,508 WARN L188 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 11 [2019-09-03 20:02:30,993 WARN L188 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 11 [2019-09-03 20:02:31,478 WARN L188 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 11 [2019-09-03 20:02:31,981 WARN L188 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 11 [2019-09-03 20:02:32,487 WARN L188 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 11 [2019-09-03 20:02:32,979 WARN L188 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 11 [2019-09-03 20:02:33,492 WARN L188 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 11 [2019-09-03 20:02:33,996 WARN L188 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 11 [2019-09-03 20:02:34,518 WARN L188 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 11 [2019-09-03 20:02:35,037 WARN L188 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 11 [2019-09-03 20:02:35,551 WARN L188 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 11 [2019-09-03 20:02:36,062 WARN L188 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 11 [2019-09-03 20:02:36,570 WARN L188 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 11 [2019-09-03 20:02:37,092 WARN L188 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 11 [2019-09-03 20:02:37,624 WARN L188 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 11 [2019-09-03 20:02:38,146 WARN L188 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 11 [2019-09-03 20:02:38,673 WARN L188 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2019-09-03 20:02:39,193 WARN L188 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2019-09-03 20:02:39,710 WARN L188 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2019-09-03 20:02:40,232 WARN L188 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2019-09-03 20:02:40,749 WARN L188 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2019-09-03 20:02:41,294 WARN L188 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2019-09-03 20:02:41,855 WARN L188 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2019-09-03 20:02:42,383 WARN L188 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2019-09-03 20:02:42,916 WARN L188 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2019-09-03 20:02:43,444 WARN L188 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2019-09-03 20:02:43,973 WARN L188 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2019-09-03 20:02:44,493 WARN L188 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2019-09-03 20:02:45,022 WARN L188 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2019-09-03 20:02:45,553 WARN L188 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2019-09-03 20:02:46,065 WARN L188 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2019-09-03 20:02:46,566 WARN L188 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2019-09-03 20:02:47,094 WARN L188 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2019-09-03 20:02:47,631 WARN L188 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2019-09-03 20:02:48,168 WARN L188 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2019-09-03 20:02:48,699 WARN L188 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2019-09-03 20:02:49,231 WARN L188 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2019-09-03 20:02:49,754 WARN L188 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2019-09-03 20:02:50,262 WARN L188 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2019-09-03 20:02:50,778 WARN L188 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2019-09-03 20:02:51,279 WARN L188 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2019-09-03 20:02:51,787 WARN L188 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2019-09-03 20:02:52,282 WARN L188 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2019-09-03 20:02:52,781 WARN L188 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2019-09-03 20:02:53,286 WARN L188 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2019-09-03 20:02:53,822 WARN L188 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2019-09-03 20:02:54,330 WARN L188 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2019-09-03 20:02:54,832 WARN L188 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2019-09-03 20:02:55,305 WARN L188 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2019-09-03 20:02:55,790 WARN L188 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2019-09-03 20:02:56,280 WARN L188 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2019-09-03 20:02:56,774 WARN L188 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2019-09-03 20:02:57,266 WARN L188 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-03 20:02:57,764 WARN L188 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-03 20:02:58,239 WARN L188 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-03 20:02:58,705 WARN L188 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-03 20:02:59,157 WARN L188 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-03 20:02:59,612 WARN L188 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2019-09-03 20:03:00,063 WARN L188 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2019-09-03 20:03:00,943 WARN L188 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 11 [2019-09-03 20:03:01,383 WARN L188 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 11 [2019-09-03 20:03:13,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:03:13,314 INFO L93 Difference]: Finished difference Result 249 states and 252 transitions. [2019-09-03 20:03:13,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2019-09-03 20:03:13,314 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 235 [2019-09-03 20:03:13,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:03:13,316 INFO L225 Difference]: With dead ends: 249 [2019-09-03 20:03:13,316 INFO L226 Difference]: Without dead ends: 244 [2019-09-03 20:03:13,318 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6784 ImplicationChecksByTransitivity, 53.9s TimeCoverageRelationStatistics Valid=13811, Invalid=40711, Unknown=0, NotChecked=0, Total=54522 [2019-09-03 20:03:13,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2019-09-03 20:03:13,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2019-09-03 20:03:13,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2019-09-03 20:03:13,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 244 transitions. [2019-09-03 20:03:13,328 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 244 transitions. Word has length 235 [2019-09-03 20:03:13,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:03:13,329 INFO L475 AbstractCegarLoop]: Abstraction has 244 states and 244 transitions. [2019-09-03 20:03:13,329 INFO L476 AbstractCegarLoop]: Interpolant automaton has 119 states. [2019-09-03 20:03:13,329 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 244 transitions. [2019-09-03 20:03:13,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2019-09-03 20:03:13,330 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:03:13,330 INFO L399 BasicCegarLoop]: trace histogram [116, 116, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:03:13,331 INFO L418 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:03:13,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:03:13,331 INFO L82 PathProgramCache]: Analyzing trace with hash 336937239, now seen corresponding path program 30 times [2019-09-03 20:03:13,331 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:03:13,331 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:03:13,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:03:13,332 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:03:13,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:03:14,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:03:20,815 INFO L134 CoverageAnalysis]: Checked inductivity of 13456 backedges. 0 proven. 13456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:03:20,816 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:03:20,816 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:03:20,825 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 20:03:21,019 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 117 check-sat command(s) [2019-09-03 20:03:21,020 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:03:21,028 INFO L256 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 119 conjunts are in the unsatisfiable core [2019-09-03 20:03:21,031 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:03:21,437 INFO L134 CoverageAnalysis]: Checked inductivity of 13456 backedges. 0 proven. 13456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:03:21,441 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:03:21,441 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [120, 120] total 123 [2019-09-03 20:03:21,441 INFO L454 AbstractCegarLoop]: Interpolant automaton has 123 states [2019-09-03 20:03:21,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2019-09-03 20:03:21,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=14756, Unknown=0, NotChecked=0, Total=15006 [2019-09-03 20:03:21,442 INFO L87 Difference]: Start difference. First operand 244 states and 244 transitions. Second operand 123 states. [2019-09-03 20:03:21,966 WARN L188 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 8 [2019-09-03 20:03:22,391 WARN L188 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 8 [2019-09-03 20:03:22,834 WARN L188 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 9 [2019-09-03 20:03:23,287 WARN L188 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 11 [2019-09-03 20:03:23,759 WARN L188 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 11 [2019-09-03 20:03:24,245 WARN L188 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 11 [2019-09-03 20:03:24,708 WARN L188 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 11 [2019-09-03 20:03:25,183 WARN L188 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 11 [2019-09-03 20:03:25,665 WARN L188 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 11 [2019-09-03 20:03:26,144 WARN L188 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 11 [2019-09-03 20:03:26,639 WARN L188 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 11 [2019-09-03 20:03:27,128 WARN L188 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 11 [2019-09-03 20:03:27,617 WARN L188 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 11 [2019-09-03 20:03:28,118 WARN L188 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 11 [2019-09-03 20:03:28,615 WARN L188 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 11 [2019-09-03 20:03:29,116 WARN L188 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 11 [2019-09-03 20:03:29,614 WARN L188 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 11 [2019-09-03 20:03:30,142 WARN L188 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 11 [2019-09-03 20:03:30,680 WARN L188 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 11 [2019-09-03 20:03:31,195 WARN L188 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 11 [2019-09-03 20:03:31,716 WARN L188 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 11 [2019-09-03 20:03:32,252 WARN L188 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 11 [2019-09-03 20:03:32,800 WARN L188 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 11 [2019-09-03 20:03:33,352 WARN L188 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 11 [2019-09-03 20:03:33,877 WARN L188 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 11 [2019-09-03 20:03:34,437 WARN L188 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 11 [2019-09-03 20:03:34,983 WARN L188 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 11 [2019-09-03 20:03:35,536 WARN L188 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 11 [2019-09-03 20:03:36,099 WARN L188 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 11 [2019-09-03 20:03:36,656 WARN L188 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 11 [2019-09-03 20:03:37,209 WARN L188 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 11 [2019-09-03 20:03:37,751 WARN L188 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2019-09-03 20:03:38,311 WARN L188 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2019-09-03 20:03:38,887 WARN L188 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2019-09-03 20:03:39,448 WARN L188 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2019-09-03 20:03:40,020 WARN L188 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2019-09-03 20:03:40,568 WARN L188 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2019-09-03 20:03:41,139 WARN L188 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2019-09-03 20:03:41,684 WARN L188 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2019-09-03 20:03:42,251 WARN L188 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2019-09-03 20:03:42,821 WARN L188 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2019-09-03 20:03:43,377 WARN L188 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2019-09-03 20:03:43,900 WARN L188 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2019-09-03 20:03:44,449 WARN L188 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2019-09-03 20:03:45,046 WARN L188 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2019-09-03 20:03:45,614 WARN L188 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2019-09-03 20:03:46,199 WARN L188 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2019-09-03 20:03:46,768 WARN L188 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2019-09-03 20:03:47,332 WARN L188 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2019-09-03 20:03:47,897 WARN L188 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2019-09-03 20:03:48,407 WARN L188 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2019-09-03 20:03:48,930 WARN L188 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2019-09-03 20:03:49,473 WARN L188 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2019-09-03 20:03:50,027 WARN L188 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2019-09-03 20:03:50,571 WARN L188 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2019-09-03 20:03:51,129 WARN L188 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2019-09-03 20:03:51,676 WARN L188 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2019-09-03 20:03:52,260 WARN L188 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2019-09-03 20:03:52,798 WARN L188 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2019-09-03 20:03:53,333 WARN L188 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2019-09-03 20:03:53,850 WARN L188 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2019-09-03 20:03:54,366 WARN L188 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2019-09-03 20:03:54,879 WARN L188 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2019-09-03 20:03:55,424 WARN L188 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2019-09-03 20:03:55,941 WARN L188 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2019-09-03 20:03:56,463 WARN L188 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2019-09-03 20:03:56,983 WARN L188 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2019-09-03 20:03:57,491 WARN L188 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-03 20:03:57,999 WARN L188 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-03 20:03:58,510 WARN L188 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-03 20:03:58,990 WARN L188 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-03 20:03:59,469 WARN L188 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-03 20:03:59,932 WARN L188 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2019-09-03 20:04:00,405 WARN L188 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2019-09-03 20:04:14,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:04:14,561 INFO L93 Difference]: Finished difference Result 257 states and 260 transitions. [2019-09-03 20:04:14,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2019-09-03 20:04:14,562 INFO L78 Accepts]: Start accepts. Automaton has 123 states. Word has length 243 [2019-09-03 20:04:14,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:04:14,563 INFO L225 Difference]: With dead ends: 257 [2019-09-03 20:04:14,563 INFO L226 Difference]: Without dead ends: 252 [2019-09-03 20:04:14,565 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7258 ImplicationChecksByTransitivity, 58.8s TimeCoverageRelationStatistics Valid=14767, Invalid=43555, Unknown=0, NotChecked=0, Total=58322 [2019-09-03 20:04:14,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2019-09-03 20:04:14,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2019-09-03 20:04:14,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2019-09-03 20:04:14,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 252 transitions. [2019-09-03 20:04:14,574 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 252 transitions. Word has length 243 [2019-09-03 20:04:14,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:04:14,575 INFO L475 AbstractCegarLoop]: Abstraction has 252 states and 252 transitions. [2019-09-03 20:04:14,575 INFO L476 AbstractCegarLoop]: Interpolant automaton has 123 states. [2019-09-03 20:04:14,575 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 252 transitions. [2019-09-03 20:04:14,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2019-09-03 20:04:14,576 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:04:14,576 INFO L399 BasicCegarLoop]: trace histogram [120, 120, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:04:14,577 INFO L418 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:04:14,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:04:14,577 INFO L82 PathProgramCache]: Analyzing trace with hash -296928497, now seen corresponding path program 31 times [2019-09-03 20:04:14,577 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:04:14,577 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:04:14,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:14,578 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:04:14,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:15,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:04:22,332 INFO L134 CoverageAnalysis]: Checked inductivity of 14400 backedges. 0 proven. 14400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:04:22,333 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:04:22,333 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2019-09-03 20:04:22,344 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:04:23,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:04:24,680 INFO L256 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 123 conjunts are in the unsatisfiable core [2019-09-03 20:04:24,682 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:04:25,155 INFO L134 CoverageAnalysis]: Checked inductivity of 14400 backedges. 0 proven. 14400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:04:25,159 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:04:25,159 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [124, 124] total 127 [2019-09-03 20:04:25,160 INFO L454 AbstractCegarLoop]: Interpolant automaton has 127 states [2019-09-03 20:04:25,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2019-09-03 20:04:25,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=15744, Unknown=0, NotChecked=0, Total=16002 [2019-09-03 20:04:25,161 INFO L87 Difference]: Start difference. First operand 252 states and 252 transitions. Second operand 127 states. [2019-09-03 20:04:25,743 WARN L188 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 8 [2019-09-03 20:04:26,208 WARN L188 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 8 [2019-09-03 20:04:26,705 WARN L188 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 9 [2019-09-03 20:04:27,207 WARN L188 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 11 [2019-09-03 20:04:27,718 WARN L188 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 11 [2019-09-03 20:04:28,225 WARN L188 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 11 [2019-09-03 20:04:28,738 WARN L188 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 11 [2019-09-03 20:04:29,256 WARN L188 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 11 [2019-09-03 20:04:29,777 WARN L188 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 11 [2019-09-03 20:04:30,297 WARN L188 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 11 [2019-09-03 20:04:30,824 WARN L188 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 11 [2019-09-03 20:04:31,351 WARN L188 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 11 [2019-09-03 20:04:31,891 WARN L188 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 11 [2019-09-03 20:04:32,429 WARN L188 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 11 [2019-09-03 20:04:32,977 WARN L188 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 11 [2019-09-03 20:04:33,537 WARN L188 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 11 [2019-09-03 20:04:34,088 WARN L188 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 11 [2019-09-03 20:04:34,652 WARN L188 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 11 [2019-09-03 20:04:35,225 WARN L188 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 11 [2019-09-03 20:04:35,797 WARN L188 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 11 [2019-09-03 20:04:36,360 WARN L188 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 11 [2019-09-03 20:04:36,931 WARN L188 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 11 [2019-09-03 20:04:37,497 WARN L188 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 11 [2019-09-03 20:04:38,074 WARN L188 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 11 [2019-09-03 20:04:38,656 WARN L188 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 11 [2019-09-03 20:04:39,234 WARN L188 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 11 [2019-09-03 20:04:39,816 WARN L188 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 11 [2019-09-03 20:04:40,404 WARN L188 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 11 [2019-09-03 20:04:40,974 WARN L188 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 11 [2019-09-03 20:04:41,542 WARN L188 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 11 [2019-09-03 20:04:42,119 WARN L188 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 11 [2019-09-03 20:04:42,708 WARN L188 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 11 [2019-09-03 20:04:43,289 WARN L188 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 11 [2019-09-03 20:04:43,869 WARN L188 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 11 [2019-09-03 20:04:44,465 WARN L188 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 11 [2019-09-03 20:04:45,052 WARN L188 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2019-09-03 20:04:45,632 WARN L188 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2019-09-03 20:04:46,210 WARN L188 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2019-09-03 20:04:46,786 WARN L188 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2019-09-03 20:04:47,370 WARN L188 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2019-09-03 20:04:47,961 WARN L188 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2019-09-03 20:04:48,530 WARN L188 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2019-09-03 20:04:49,092 WARN L188 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2019-09-03 20:04:49,669 WARN L188 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2019-09-03 20:04:50,248 WARN L188 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2019-09-03 20:04:50,860 WARN L188 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2019-09-03 20:04:51,481 WARN L188 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2019-09-03 20:04:52,058 WARN L188 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2019-09-03 20:04:52,640 WARN L188 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2019-09-03 20:04:53,204 WARN L188 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2019-09-03 20:04:53,759 WARN L188 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2019-09-03 20:04:54,309 WARN L188 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2019-09-03 20:04:54,890 WARN L188 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2019-09-03 20:04:55,451 WARN L188 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2019-09-03 20:04:55,997 WARN L188 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2019-09-03 20:04:56,566 WARN L188 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2019-09-03 20:04:57,137 WARN L188 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2019-09-03 20:04:57,713 WARN L188 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2019-09-03 20:04:58,263 WARN L188 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2019-09-03 20:04:58,810 WARN L188 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2019-09-03 20:04:59,365 WARN L188 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2019-09-03 20:04:59,914 WARN L188 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2019-09-03 20:05:00,477 WARN L188 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2019-09-03 20:05:01,022 WARN L188 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2019-09-03 20:05:01,589 WARN L188 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2019-09-03 20:05:02,127 WARN L188 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2019-09-03 20:05:02,659 WARN L188 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2019-09-03 20:05:03,182 WARN L188 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2019-09-03 20:05:03,705 WARN L188 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2019-09-03 20:05:04,227 WARN L188 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2019-09-03 20:05:04,740 WARN L188 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2019-09-03 20:05:05,248 WARN L188 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-03 20:05:05,752 WARN L188 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-03 20:05:06,245 WARN L188 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-03 20:05:06,720 WARN L188 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-03 20:05:07,198 WARN L188 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-03 20:05:07,670 WARN L188 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2019-09-03 20:05:08,149 WARN L188 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2019-09-03 20:05:08,642 WARN L188 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2019-09-03 20:05:09,097 WARN L188 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 11 [2019-09-03 20:05:22,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:05:22,484 INFO L93 Difference]: Finished difference Result 265 states and 268 transitions. [2019-09-03 20:05:22,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2019-09-03 20:05:22,484 INFO L78 Accepts]: Start accepts. Automaton has 127 states. Word has length 251 [2019-09-03 20:05:22,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:05:22,485 INFO L225 Difference]: With dead ends: 265 [2019-09-03 20:05:22,485 INFO L226 Difference]: Without dead ends: 260 [2019-09-03 20:05:22,487 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7748 ImplicationChecksByTransitivity, 63.4s TimeCoverageRelationStatistics Valid=15755, Invalid=46495, Unknown=0, NotChecked=0, Total=62250 [2019-09-03 20:05:22,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2019-09-03 20:05:22,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2019-09-03 20:05:22,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2019-09-03 20:05:22,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 260 transitions. [2019-09-03 20:05:22,496 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 260 transitions. Word has length 251 [2019-09-03 20:05:22,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:05:22,496 INFO L475 AbstractCegarLoop]: Abstraction has 260 states and 260 transitions. [2019-09-03 20:05:22,497 INFO L476 AbstractCegarLoop]: Interpolant automaton has 127 states. [2019-09-03 20:05:22,497 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 260 transitions. [2019-09-03 20:05:22,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2019-09-03 20:05:22,498 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:05:22,498 INFO L399 BasicCegarLoop]: trace histogram [124, 124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:05:22,498 INFO L418 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:05:22,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:05:22,499 INFO L82 PathProgramCache]: Analyzing trace with hash -741884665, now seen corresponding path program 32 times [2019-09-03 20:05:22,499 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:05:22,499 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:05:22,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:22,500 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:05:22,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:23,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:05:30,840 INFO L134 CoverageAnalysis]: Checked inductivity of 15376 backedges. 0 proven. 15376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:05:30,840 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:05:30,840 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2019-09-03 20:05:30,851 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:05:32,435 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:05:32,436 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:05:33,443 INFO L256 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 127 conjunts are in the unsatisfiable core [2019-09-03 20:05:33,445 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:05:34,001 INFO L134 CoverageAnalysis]: Checked inductivity of 15376 backedges. 0 proven. 15376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:05:34,004 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:05:34,005 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [128, 128] total 131 [2019-09-03 20:05:34,005 INFO L454 AbstractCegarLoop]: Interpolant automaton has 131 states [2019-09-03 20:05:34,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2019-09-03 20:05:34,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=16764, Unknown=0, NotChecked=0, Total=17030 [2019-09-03 20:05:34,006 INFO L87 Difference]: Start difference. First operand 260 states and 260 transitions. Second operand 131 states. [2019-09-03 20:05:34,624 WARN L188 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 8 [2019-09-03 20:05:35,117 WARN L188 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 375 DAG size of output: 8 [2019-09-03 20:05:35,647 WARN L188 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 381 DAG size of output: 9 [2019-09-03 20:05:36,181 WARN L188 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 380 DAG size of output: 11 [2019-09-03 20:05:36,718 WARN L188 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 11 [2019-09-03 20:05:37,256 WARN L188 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 374 DAG size of output: 11 [2019-09-03 20:05:37,804 WARN L188 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 371 DAG size of output: 11 [2019-09-03 20:05:38,371 WARN L188 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 11 [2019-09-03 20:05:38,931 WARN L188 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 11 [2019-09-03 20:05:39,481 WARN L188 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 11 [2019-09-03 20:05:40,046 WARN L188 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 11 [2019-09-03 20:05:40,613 WARN L188 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 11 [2019-09-03 20:05:41,178 WARN L188 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 11 [2019-09-03 20:05:41,743 WARN L188 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 11 [2019-09-03 20:05:42,309 WARN L188 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 11 [2019-09-03 20:05:42,874 WARN L188 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 11 [2019-09-03 20:05:43,460 WARN L188 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 11 [2019-09-03 20:05:44,054 WARN L188 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 11 [2019-09-03 20:05:44,643 WARN L188 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 11 [2019-09-03 20:05:45,234 WARN L188 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 11 [2019-09-03 20:05:45,820 WARN L188 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 11 [2019-09-03 20:05:46,414 WARN L188 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 11 [2019-09-03 20:05:47,015 WARN L188 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 11 [2019-09-03 20:05:47,624 WARN L188 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 11 [2019-09-03 20:05:48,245 WARN L188 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 11 [2019-09-03 20:05:48,872 WARN L188 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 11 [2019-09-03 20:05:49,487 WARN L188 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 11 [2019-09-03 20:05:50,114 WARN L188 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 11 [2019-09-03 20:05:50,728 WARN L188 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 11 [2019-09-03 20:05:51,339 WARN L188 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 11 [2019-09-03 20:05:51,953 WARN L188 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 11 [2019-09-03 20:05:52,569 WARN L188 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 11 [2019-09-03 20:05:53,183 WARN L188 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 11 [2019-09-03 20:05:53,803 WARN L188 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 11 [2019-09-03 20:05:54,423 WARN L188 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 11 [2019-09-03 20:05:55,046 WARN L188 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 11 [2019-09-03 20:05:55,654 WARN L188 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 11 [2019-09-03 20:05:56,274 WARN L188 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 11 [2019-09-03 20:05:56,883 WARN L188 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 11 [2019-09-03 20:05:57,487 WARN L188 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2019-09-03 20:05:58,107 WARN L188 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2019-09-03 20:05:58,710 WARN L188 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2019-09-03 20:05:59,306 WARN L188 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2019-09-03 20:05:59,912 WARN L188 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2019-09-03 20:06:00,530 WARN L188 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2019-09-03 20:06:01,165 WARN L188 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2019-09-03 20:06:01,795 WARN L188 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2019-09-03 20:06:02,424 WARN L188 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2019-09-03 20:06:03,032 WARN L188 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2019-09-03 20:06:03,641 WARN L188 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2019-09-03 20:06:04,229 WARN L188 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2019-09-03 20:06:04,816 WARN L188 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2019-09-03 20:06:05,425 WARN L188 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2019-09-03 20:06:06,025 WARN L188 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2019-09-03 20:06:06,607 WARN L188 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2019-09-03 20:06:07,201 WARN L188 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2019-09-03 20:06:07,813 WARN L188 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2019-09-03 20:06:08,411 WARN L188 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2019-09-03 20:06:09,008 WARN L188 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2019-09-03 20:06:09,594 WARN L188 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2019-09-03 20:06:10,155 WARN L188 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2019-09-03 20:06:10,738 WARN L188 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2019-09-03 20:06:11,335 WARN L188 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2019-09-03 20:06:11,925 WARN L188 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2019-09-03 20:06:12,529 WARN L188 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2019-09-03 20:06:13,112 WARN L188 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2019-09-03 20:06:13,693 WARN L188 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2019-09-03 20:06:14,270 WARN L188 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2019-09-03 20:06:14,837 WARN L188 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2019-09-03 20:06:15,403 WARN L188 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2019-09-03 20:06:15,968 WARN L188 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2019-09-03 20:06:16,523 WARN L188 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2019-09-03 20:06:17,066 WARN L188 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2019-09-03 20:06:17,611 WARN L188 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2019-09-03 20:06:18,115 WARN L188 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2019-09-03 20:06:18,668 WARN L188 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-03 20:06:19,201 WARN L188 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-03 20:06:19,728 WARN L188 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-03 20:06:20,239 WARN L188 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-03 20:06:20,726 WARN L188 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-03 20:06:21,223 WARN L188 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2019-09-03 20:06:21,695 WARN L188 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2019-09-03 20:06:22,195 WARN L188 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2019-09-03 20:06:36,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:06:36,702 INFO L93 Difference]: Finished difference Result 273 states and 276 transitions. [2019-09-03 20:06:36,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2019-09-03 20:06:36,702 INFO L78 Accepts]: Start accepts. Automaton has 131 states. Word has length 259 [2019-09-03 20:06:36,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:06:36,704 INFO L225 Difference]: With dead ends: 273 [2019-09-03 20:06:36,704 INFO L226 Difference]: Without dead ends: 268 [2019-09-03 20:06:36,705 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 256 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8254 ImplicationChecksByTransitivity, 69.3s TimeCoverageRelationStatistics Valid=16775, Invalid=49531, Unknown=0, NotChecked=0, Total=66306 [2019-09-03 20:06:36,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2019-09-03 20:06:36,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2019-09-03 20:06:36,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2019-09-03 20:06:36,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 268 transitions. [2019-09-03 20:06:36,713 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 268 transitions. Word has length 259 [2019-09-03 20:06:36,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:06:36,714 INFO L475 AbstractCegarLoop]: Abstraction has 268 states and 268 transitions. [2019-09-03 20:06:36,714 INFO L476 AbstractCegarLoop]: Interpolant automaton has 131 states. [2019-09-03 20:06:36,714 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 268 transitions. [2019-09-03 20:06:36,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2019-09-03 20:06:36,715 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:06:36,716 INFO L399 BasicCegarLoop]: trace histogram [128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:06:36,716 INFO L418 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:06:36,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:06:36,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1115896065, now seen corresponding path program 33 times [2019-09-03 20:06:36,716 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:06:36,717 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:06:36,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:06:36,717 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:06:36,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:06:38,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:06:45,626 INFO L134 CoverageAnalysis]: Checked inductivity of 16384 backedges. 0 proven. 16384 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:06:45,626 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:06:45,626 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2019-09-03 20:06:45,636 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:06:45,861 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 129 check-sat command(s) [2019-09-03 20:06:45,861 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:06:45,870 INFO L256 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 131 conjunts are in the unsatisfiable core [2019-09-03 20:06:45,873 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:06:46,373 INFO L134 CoverageAnalysis]: Checked inductivity of 16384 backedges. 0 proven. 16384 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:06:46,376 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:06:46,376 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [132, 132] total 135 [2019-09-03 20:06:46,377 INFO L454 AbstractCegarLoop]: Interpolant automaton has 135 states [2019-09-03 20:06:46,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2019-09-03 20:06:46,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=17816, Unknown=0, NotChecked=0, Total=18090 [2019-09-03 20:06:46,378 INFO L87 Difference]: Start difference. First operand 268 states and 268 transitions. Second operand 135 states. [2019-09-03 20:06:47,069 WARN L188 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 8 [2019-09-03 20:06:47,582 WARN L188 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 387 DAG size of output: 8 [2019-09-03 20:06:48,123 WARN L188 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 9 [2019-09-03 20:06:48,685 WARN L188 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 392 DAG size of output: 11 [2019-09-03 20:06:49,255 WARN L188 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 11 [2019-09-03 20:06:49,820 WARN L188 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 386 DAG size of output: 11 [2019-09-03 20:06:50,384 WARN L188 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 11 [2019-09-03 20:06:50,955 WARN L188 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 380 DAG size of output: 11 [2019-09-03 20:06:51,547 WARN L188 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 11 [2019-09-03 20:06:52,152 WARN L188 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 374 DAG size of output: 11 [2019-09-03 20:06:52,738 WARN L188 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 371 DAG size of output: 11 [2019-09-03 20:06:53,332 WARN L188 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 11 [2019-09-03 20:06:53,941 WARN L188 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 11 [2019-09-03 20:06:54,543 WARN L188 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 11 [2019-09-03 20:06:55,149 WARN L188 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 11 [2019-09-03 20:06:55,756 WARN L188 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 11 [2019-09-03 20:06:56,370 WARN L188 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 11 [2019-09-03 20:06:56,982 WARN L188 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 11 [2019-09-03 20:06:57,611 WARN L188 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 11 [2019-09-03 20:06:58,233 WARN L188 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 11 [2019-09-03 20:06:58,874 WARN L188 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 11 [2019-09-03 20:06:59,500 WARN L188 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 11 [2019-09-03 20:07:00,125 WARN L188 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 11 [2019-09-03 20:07:00,757 WARN L188 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 11 [2019-09-03 20:07:01,414 WARN L188 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 11 [2019-09-03 20:07:02,045 WARN L188 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 11 [2019-09-03 20:07:02,704 WARN L188 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 11 [2019-09-03 20:07:03,363 WARN L188 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 11 [2019-09-03 20:07:04,029 WARN L188 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 11 [2019-09-03 20:07:04,673 WARN L188 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 11 [2019-09-03 20:07:05,317 WARN L188 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 11 [2019-09-03 20:07:05,958 WARN L188 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 11 [2019-09-03 20:07:06,611 WARN L188 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 11 [2019-09-03 20:07:07,264 WARN L188 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 11 [2019-09-03 20:07:07,899 WARN L188 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 11 [2019-09-03 20:07:08,546 WARN L188 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 11 [2019-09-03 20:07:09,191 WARN L188 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 11 [2019-09-03 20:07:09,832 WARN L188 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 11 [2019-09-03 20:07:10,468 WARN L188 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 11 [2019-09-03 20:07:11,110 WARN L188 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 11 [2019-09-03 20:07:11,782 WARN L188 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 11 [2019-09-03 20:07:12,426 WARN L188 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 11 [2019-09-03 20:07:13,069 WARN L188 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 11 [2019-09-03 20:07:13,710 WARN L188 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2019-09-03 20:07:14,355 WARN L188 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2019-09-03 20:07:15,030 WARN L188 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2019-09-03 20:07:15,698 WARN L188 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2019-09-03 20:07:16,352 WARN L188 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2019-09-03 20:07:16,986 WARN L188 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2019-09-03 20:07:17,653 WARN L188 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2019-09-03 20:07:18,318 WARN L188 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2019-09-03 20:07:18,972 WARN L188 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2019-09-03 20:07:19,640 WARN L188 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2019-09-03 20:07:20,315 WARN L188 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2019-09-03 20:07:20,970 WARN L188 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2019-09-03 20:07:21,594 WARN L188 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2019-09-03 20:07:22,232 WARN L188 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2019-09-03 20:07:22,839 WARN L188 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2019-09-03 20:07:23,474 WARN L188 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2019-09-03 20:07:24,093 WARN L188 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2019-09-03 20:07:24,705 WARN L188 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2019-09-03 20:07:25,309 WARN L188 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2019-09-03 20:07:25,936 WARN L188 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2019-09-03 20:07:26,589 WARN L188 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2019-09-03 20:07:27,214 WARN L188 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2019-09-03 20:07:27,850 WARN L188 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2019-09-03 20:07:28,476 WARN L188 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2019-09-03 20:07:29,091 WARN L188 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2019-09-03 20:07:29,714 WARN L188 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2019-09-03 20:07:30,350 WARN L188 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2019-09-03 20:07:30,963 WARN L188 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2019-09-03 20:07:31,552 WARN L188 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2019-09-03 20:07:32,163 WARN L188 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2019-09-03 20:07:32,750 WARN L188 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2019-09-03 20:07:33,332 WARN L188 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2019-09-03 20:07:33,901 WARN L188 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2019-09-03 20:07:34,461 WARN L188 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2019-09-03 20:07:35,028 WARN L188 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2019-09-03 20:07:35,563 WARN L188 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2019-09-03 20:07:36,104 WARN L188 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-03 20:07:36,642 WARN L188 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-03 20:07:37,150 WARN L188 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-03 20:07:37,658 WARN L188 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-03 20:07:38,184 WARN L188 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-03 20:07:38,697 WARN L188 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2019-09-03 20:07:39,205 WARN L188 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11