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/array-examples/standard_two_index_05.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-01 23:41:13,604 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-01 23:41:13,606 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-01 23:41:13,617 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-01 23:41:13,617 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-01 23:41:13,619 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-01 23:41:13,620 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-01 23:41:13,622 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-01 23:41:13,624 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-01 23:41:13,624 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-01 23:41:13,625 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-01 23:41:13,626 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-01 23:41:13,627 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-01 23:41:13,628 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-01 23:41:13,629 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-01 23:41:13,630 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-01 23:41:13,631 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-01 23:41:13,632 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-01 23:41:13,633 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-01 23:41:13,635 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-01 23:41:13,637 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-01 23:41:13,638 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-01 23:41:13,639 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-01 23:41:13,640 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-01 23:41:13,642 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-01 23:41:13,649 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-01 23:41:13,650 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-01 23:41:13,652 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-01 23:41:13,653 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 [2019-10-01 23:41:13,676 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-01 23:41:13,676 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-01 23:41:13,678 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-01 23:41:13,678 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-01 23:41:13,678 INFO L138 SettingsManager]: * Use SBE=true [2019-10-01 23:41:13,678 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-01 23:41:13,679 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-01 23:41:13,679 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-01 23:41:13,679 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-01 23:41:13,679 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-01 23:41:13,680 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-01 23:41:13,680 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-01 23:41:13,680 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-01 23:41:13,681 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-01 23:41:13,681 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-01 23:41:13,681 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-01 23:41:13,681 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-01 23:41:13,682 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-01 23:41:13,682 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-01 23:41:13,682 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-01 23:41:13,682 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-01 23:41:13,683 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-01 23:41:13,683 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-01 23:41:13,683 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-01 23:41:13,683 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-01 23:41:13,684 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-01 23:41:13,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-01 23:41:13,684 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-01 23:41:13,684 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-01 23:41:13,728 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-01 23:41:13,739 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-01 23:41:13,743 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-01 23:41:13,744 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-01 23:41:13,744 INFO L275 PluginConnector]: CDTParser initialized [2019-10-01 23:41:13,745 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_05.i [2019-10-01 23:41:13,805 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/574dde07b/c46a63201abd4aa9b335e3ca5292d723/FLAGa816c0011 [2019-10-01 23:41:14,241 INFO L306 CDTParser]: Found 1 translation units. [2019-10-01 23:41:14,242 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_two_index_05.i [2019-10-01 23:41:14,248 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/574dde07b/c46a63201abd4aa9b335e3ca5292d723/FLAGa816c0011 [2019-10-01 23:41:14,648 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/574dde07b/c46a63201abd4aa9b335e3ca5292d723 [2019-10-01 23:41:14,659 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-01 23:41:14,661 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-01 23:41:14,662 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-01 23:41:14,662 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-01 23:41:14,665 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-01 23:41:14,666 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.10 11:41:14" (1/1) ... [2019-10-01 23:41:14,669 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6157593b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:41:14, skipping insertion in model container [2019-10-01 23:41:14,670 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.10 11:41:14" (1/1) ... [2019-10-01 23:41:14,677 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-01 23:41:14,694 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-01 23:41:14,893 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-01 23:41:14,896 INFO L188 MainTranslator]: Completed pre-run [2019-10-01 23:41:14,915 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-01 23:41:15,025 INFO L192 MainTranslator]: Completed translation [2019-10-01 23:41:15,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:41:15 WrapperNode [2019-10-01 23:41:15,026 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-01 23:41:15,027 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-01 23:41:15,027 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-01 23:41:15,027 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-01 23:41:15,043 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:41:15" (1/1) ... [2019-10-01 23:41:15,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:41:15" (1/1) ... [2019-10-01 23:41:15,052 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:41:15" (1/1) ... [2019-10-01 23:41:15,054 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:41:15" (1/1) ... [2019-10-01 23:41:15,072 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:41:15" (1/1) ... [2019-10-01 23:41:15,077 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:41:15" (1/1) ... [2019-10-01 23:41:15,078 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:41:15" (1/1) ... [2019-10-01 23:41:15,080 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-01 23:41:15,081 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-01 23:41:15,081 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-01 23:41:15,081 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-01 23:41:15,082 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:41:15" (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 [2019-10-01 23:41:15,138 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-01 23:41:15,138 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-01 23:41:15,139 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-01 23:41:15,139 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-01 23:41:15,139 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-01 23:41:15,139 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-01 23:41:15,139 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-01 23:41:15,139 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-01 23:41:15,140 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-01 23:41:15,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-01 23:41:15,140 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-01 23:41:15,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-01 23:41:15,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-01 23:41:15,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-01 23:41:15,347 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-01 23:41:15,347 INFO L283 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-01 23:41:15,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.10 11:41:15 BoogieIcfgContainer [2019-10-01 23:41:15,349 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-01 23:41:15,350 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-01 23:41:15,350 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-01 23:41:15,353 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-01 23:41:15,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.10 11:41:14" (1/3) ... [2019-10-01 23:41:15,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2565f030 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.10 11:41:15, skipping insertion in model container [2019-10-01 23:41:15,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:41:15" (2/3) ... [2019-10-01 23:41:15,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2565f030 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.10 11:41:15, skipping insertion in model container [2019-10-01 23:41:15,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.10 11:41:15" (3/3) ... [2019-10-01 23:41:15,357 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_two_index_05.i [2019-10-01 23:41:15,367 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-01 23:41:15,375 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-01 23:41:15,411 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-01 23:41:15,454 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-10-01 23:41:15,455 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-01 23:41:15,455 INFO L378 AbstractCegarLoop]: Hoare is true [2019-10-01 23:41:15,455 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-01 23:41:15,455 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-01 23:41:15,455 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-01 23:41:15,456 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-01 23:41:15,456 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-01 23:41:15,456 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-01 23:41:15,477 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-10-01 23:41:15,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-01 23:41:15,484 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:41:15,484 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:41:15,487 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:41:15,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:41:15,493 INFO L82 PathProgramCache]: Analyzing trace with hash -2029643862, now seen corresponding path program 1 times [2019-10-01 23:41:15,496 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:41:15,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:41:15,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:41:15,556 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:41:15,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:41:15,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:41:15,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-01 23:41:15,640 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-01 23:41:15,640 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-01 23:41:15,644 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-01 23:41:15,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-01 23:41:15,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-01 23:41:15,661 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2019-10-01 23:41:15,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:41:15,686 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2019-10-01 23:41:15,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-01 23:41:15,688 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2019-10-01 23:41:15,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:41:15,696 INFO L225 Difference]: With dead ends: 41 [2019-10-01 23:41:15,697 INFO L226 Difference]: Without dead ends: 19 [2019-10-01 23:41:15,700 INFO L640 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 [2019-10-01 23:41:15,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-10-01 23:41:15,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-10-01 23:41:15,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-01 23:41:15,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2019-10-01 23:41:15,741 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2019-10-01 23:41:15,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:41:15,741 INFO L475 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2019-10-01 23:41:15,741 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-01 23:41:15,742 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2019-10-01 23:41:15,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-01 23:41:15,742 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:41:15,743 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:41:15,743 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:41:15,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:41:15,744 INFO L82 PathProgramCache]: Analyzing trace with hash 905206694, now seen corresponding path program 1 times [2019-10-01 23:41:15,744 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:41:15,744 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:41:15,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:41:15,747 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:41:15,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:41:15,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:41:15,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-01 23:41:15,815 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-01 23:41:15,815 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-01 23:41:15,817 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-01 23:41:15,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-01 23:41:15,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-01 23:41:15,818 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 3 states. [2019-10-01 23:41:15,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:41:15,858 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2019-10-01 23:41:15,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-01 23:41:15,859 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-10-01 23:41:15,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:41:15,860 INFO L225 Difference]: With dead ends: 32 [2019-10-01 23:41:15,860 INFO L226 Difference]: Without dead ends: 20 [2019-10-01 23:41:15,862 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-01 23:41:15,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-01 23:41:15,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-01 23:41:15,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-01 23:41:15,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-10-01 23:41:15,868 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 15 [2019-10-01 23:41:15,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:41:15,868 INFO L475 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-10-01 23:41:15,868 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-01 23:41:15,868 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-10-01 23:41:15,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-01 23:41:15,869 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:41:15,869 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:41:15,870 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:41:15,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:41:15,870 INFO L82 PathProgramCache]: Analyzing trace with hash -764882998, now seen corresponding path program 1 times [2019-10-01 23:41:15,870 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:41:15,870 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:41:15,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:41:15,872 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:41:15,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:41:15,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:41:15,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-01 23:41:15,923 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-01 23:41:15,923 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-01 23:41:15,924 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-01 23:41:15,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-01 23:41:15,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-01 23:41:15,925 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 3 states. [2019-10-01 23:41:15,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:41:15,960 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2019-10-01 23:41:15,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-01 23:41:15,961 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-10-01 23:41:15,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:41:15,963 INFO L225 Difference]: With dead ends: 34 [2019-10-01 23:41:15,963 INFO L226 Difference]: Without dead ends: 24 [2019-10-01 23:41:15,964 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-01 23:41:15,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-01 23:41:15,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2019-10-01 23:41:15,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-01 23:41:15,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2019-10-01 23:41:15,982 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2019-10-01 23:41:15,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:41:15,983 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2019-10-01 23:41:15,983 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-01 23:41:15,983 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2019-10-01 23:41:15,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-01 23:41:15,984 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:41:15,984 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:41:15,990 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:41:15,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:41:15,991 INFO L82 PathProgramCache]: Analyzing trace with hash -59429947, now seen corresponding path program 1 times [2019-10-01 23:41:15,991 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:41:15,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:41:15,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:41:15,996 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:41:15,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:41:16,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:41:16,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-01 23:41:16,087 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:41:16,087 INFO L224 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 [2019-10-01 23:41:16,113 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:41:16,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:41:16,146 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-01 23:41:16,153 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:41:16,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-01 23:41:16,200 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:41:16,201 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-10-01 23:41:16,201 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-01 23:41:16,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-01 23:41:16,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-10-01 23:41:16,202 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 6 states. [2019-10-01 23:41:16,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:41:16,292 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2019-10-01 23:41:16,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-01 23:41:16,293 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2019-10-01 23:41:16,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:41:16,294 INFO L225 Difference]: With dead ends: 43 [2019-10-01 23:41:16,294 INFO L226 Difference]: Without dead ends: 30 [2019-10-01 23:41:16,295 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-10-01 23:41:16,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-01 23:41:16,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2019-10-01 23:41:16,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-01 23:41:16,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-10-01 23:41:16,304 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 17 [2019-10-01 23:41:16,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:41:16,305 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-10-01 23:41:16,305 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-01 23:41:16,305 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-10-01 23:41:16,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-01 23:41:16,307 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:41:16,308 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:41:16,308 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:41:16,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:41:16,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1897825622, now seen corresponding path program 2 times [2019-10-01 23:41:16,309 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:41:16,309 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:41:16,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:41:16,312 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:41:16,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:41:16,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:41:16,418 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-01 23:41:16,418 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:41:16,419 INFO L224 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) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 23:41:16,446 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-01 23:41:16,482 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-01 23:41:16,484 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:41:16,485 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-01 23:41:16,489 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:41:16,561 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-01 23:41:16,565 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:41:16,565 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2019-10-01 23:41:16,566 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-01 23:41:16,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-01 23:41:16,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2019-10-01 23:41:16,567 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 9 states. [2019-10-01 23:41:16,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:41:16,669 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2019-10-01 23:41:16,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-01 23:41:16,684 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2019-10-01 23:41:16,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:41:16,685 INFO L225 Difference]: With dead ends: 51 [2019-10-01 23:41:16,685 INFO L226 Difference]: Without dead ends: 37 [2019-10-01 23:41:16,686 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2019-10-01 23:41:16,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-01 23:41:16,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2019-10-01 23:41:16,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-01 23:41:16,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-10-01 23:41:16,694 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 20 [2019-10-01 23:41:16,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:41:16,694 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-10-01 23:41:16,694 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-01 23:41:16,694 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-10-01 23:41:16,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-01 23:41:16,695 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:41:16,695 INFO L411 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:41:16,696 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:41:16,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:41:16,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1456795255, now seen corresponding path program 3 times [2019-10-01 23:41:16,696 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:41:16,697 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:41:16,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:41:16,701 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:41:16,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:41:16,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:41:16,824 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-01 23:41:16,824 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:41:16,824 INFO L224 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 [2019-10-01 23:41:16,857 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-01 23:41:16,888 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-01 23:41:16,889 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:41:16,890 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-01 23:41:16,892 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:41:16,907 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-01 23:41:16,913 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:41:16,914 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-10-01 23:41:16,914 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-01 23:41:16,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-01 23:41:16,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-01 23:41:16,915 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 7 states. [2019-10-01 23:41:16,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:41:16,991 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2019-10-01 23:41:16,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-01 23:41:16,992 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2019-10-01 23:41:16,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:41:16,993 INFO L225 Difference]: With dead ends: 51 [2019-10-01 23:41:16,993 INFO L226 Difference]: Without dead ends: 41 [2019-10-01 23:41:16,994 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-01 23:41:16,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-01 23:41:16,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2019-10-01 23:41:16,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-01 23:41:17,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2019-10-01 23:41:17,000 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 24 [2019-10-01 23:41:17,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:41:17,001 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2019-10-01 23:41:17,001 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-01 23:41:17,001 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2019-10-01 23:41:17,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-01 23:41:17,002 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:41:17,002 INFO L411 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:41:17,002 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:41:17,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:41:17,003 INFO L82 PathProgramCache]: Analyzing trace with hash -33873434, now seen corresponding path program 4 times [2019-10-01 23:41:17,003 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:41:17,003 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:41:17,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:41:17,004 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:41:17,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:41:17,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:41:17,107 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-01 23:41:17,107 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:41:17,107 INFO L224 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) [2019-10-01 23:41:17,131 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 23:41:17,158 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-01 23:41:17,159 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:41:17,160 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-01 23:41:17,162 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:41:17,226 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-01 23:41:17,230 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:41:17,230 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2019-10-01 23:41:17,231 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-01 23:41:17,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-01 23:41:17,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=79, Unknown=0, NotChecked=0, Total=156 [2019-10-01 23:41:17,232 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 13 states. [2019-10-01 23:41:17,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:41:17,351 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2019-10-01 23:41:17,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-01 23:41:17,351 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2019-10-01 23:41:17,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:41:17,352 INFO L225 Difference]: With dead ends: 65 [2019-10-01 23:41:17,352 INFO L226 Difference]: Without dead ends: 49 [2019-10-01 23:41:17,353 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=77, Invalid=79, Unknown=0, NotChecked=0, Total=156 [2019-10-01 23:41:17,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-10-01 23:41:17,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2019-10-01 23:41:17,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-01 23:41:17,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2019-10-01 23:41:17,360 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 25 [2019-10-01 23:41:17,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:41:17,360 INFO L475 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2019-10-01 23:41:17,360 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-01 23:41:17,361 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2019-10-01 23:41:17,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-01 23:41:17,361 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:41:17,362 INFO L411 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:41:17,362 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:41:17,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:41:17,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1963168809, now seen corresponding path program 5 times [2019-10-01 23:41:17,362 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:41:17,363 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:41:17,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:41:17,364 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:41:17,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:41:17,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:41:17,481 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-01 23:41:17,482 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:41:17,482 INFO L224 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) [2019-10-01 23:41:17,512 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 [2019-10-01 23:41:17,642 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-01 23:41:17,643 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:41:17,645 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-01 23:41:17,647 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:41:17,672 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-01 23:41:17,679 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:41:17,679 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-10-01 23:41:17,680 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-01 23:41:17,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-01 23:41:17,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-10-01 23:41:17,680 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 9 states. [2019-10-01 23:41:17,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:41:17,787 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2019-10-01 23:41:17,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-01 23:41:17,788 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2019-10-01 23:41:17,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:41:17,789 INFO L225 Difference]: With dead ends: 63 [2019-10-01 23:41:17,789 INFO L226 Difference]: Without dead ends: 53 [2019-10-01 23:41:17,790 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-10-01 23:41:17,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-10-01 23:41:17,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 35. [2019-10-01 23:41:17,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-01 23:41:17,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2019-10-01 23:41:17,797 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 30 [2019-10-01 23:41:17,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:41:17,798 INFO L475 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2019-10-01 23:41:17,798 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-01 23:41:17,798 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2019-10-01 23:41:17,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-01 23:41:17,799 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:41:17,799 INFO L411 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:41:17,800 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:41:17,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:41:17,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1389169850, now seen corresponding path program 6 times [2019-10-01 23:41:17,800 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:41:17,800 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:41:17,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:41:17,802 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:41:17,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:41:17,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:41:17,908 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-01 23:41:17,908 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:41:17,909 INFO L224 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 [2019-10-01 23:41:17,948 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-01 23:41:18,078 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-10-01 23:41:18,079 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:41:18,081 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-01 23:41:18,085 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:41:18,105 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-01 23:41:18,112 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:41:18,113 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-10-01 23:41:18,113 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-01 23:41:18,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-01 23:41:18,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-01 23:41:18,115 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 10 states. [2019-10-01 23:41:18,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:41:18,238 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2019-10-01 23:41:18,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-01 23:41:18,239 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2019-10-01 23:41:18,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:41:18,240 INFO L225 Difference]: With dead ends: 67 [2019-10-01 23:41:18,240 INFO L226 Difference]: Without dead ends: 57 [2019-10-01 23:41:18,241 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-01 23:41:18,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-10-01 23:41:18,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 36. [2019-10-01 23:41:18,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-01 23:41:18,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2019-10-01 23:41:18,256 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 31 [2019-10-01 23:41:18,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:41:18,257 INFO L475 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2019-10-01 23:41:18,257 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-01 23:41:18,257 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2019-10-01 23:41:18,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-01 23:41:18,260 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:41:18,260 INFO L411 BasicCegarLoop]: trace histogram [10, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:41:18,260 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:41:18,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:41:18,261 INFO L82 PathProgramCache]: Analyzing trace with hash 2062514121, now seen corresponding path program 7 times [2019-10-01 23:41:18,261 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:41:18,261 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:41:18,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:41:18,265 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:41:18,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:41:18,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:41:18,404 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-01 23:41:18,404 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:41:18,404 INFO L224 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) [2019-10-01 23:41:18,428 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 23:41:18,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:41:18,461 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-01 23:41:18,463 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:41:18,552 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-01 23:41:18,556 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:41:18,557 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2019-10-01 23:41:18,557 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-01 23:41:18,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-01 23:41:18,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=191, Unknown=0, NotChecked=0, Total=380 [2019-10-01 23:41:18,559 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 20 states. [2019-10-01 23:41:18,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:41:18,712 INFO L93 Difference]: Finished difference Result 87 states and 106 transitions. [2019-10-01 23:41:18,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-01 23:41:18,713 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 32 [2019-10-01 23:41:18,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:41:18,714 INFO L225 Difference]: With dead ends: 87 [2019-10-01 23:41:18,714 INFO L226 Difference]: Without dead ends: 68 [2019-10-01 23:41:18,715 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=189, Invalid=191, Unknown=0, NotChecked=0, Total=380 [2019-10-01 23:41:18,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-10-01 23:41:18,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 44. [2019-10-01 23:41:18,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-01 23:41:18,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2019-10-01 23:41:18,723 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 32 [2019-10-01 23:41:18,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:41:18,723 INFO L475 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2019-10-01 23:41:18,723 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-01 23:41:18,723 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2019-10-01 23:41:18,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-01 23:41:18,724 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:41:18,725 INFO L411 BasicCegarLoop]: trace histogram [17, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:41:18,725 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:41:18,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:41:18,725 INFO L82 PathProgramCache]: Analyzing trace with hash -133392054, now seen corresponding path program 8 times [2019-10-01 23:41:18,725 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:41:18,726 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:41:18,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:41:18,727 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:41:18,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:41:18,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:41:18,829 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2019-10-01 23:41:18,829 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:41:18,830 INFO L224 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 [2019-10-01 23:41:18,857 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-01 23:41:18,897 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-01 23:41:18,897 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:41:18,899 INFO L256 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-01 23:41:18,901 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:41:19,045 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-01 23:41:19,049 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:41:19,050 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 20] total 26 [2019-10-01 23:41:19,050 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-01 23:41:19,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-01 23:41:19,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=326, Unknown=0, NotChecked=0, Total=650 [2019-10-01 23:41:19,052 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 26 states. [2019-10-01 23:41:19,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:41:19,270 INFO L93 Difference]: Finished difference Result 98 states and 117 transitions. [2019-10-01 23:41:19,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-01 23:41:19,271 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 40 [2019-10-01 23:41:19,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:41:19,272 INFO L225 Difference]: With dead ends: 98 [2019-10-01 23:41:19,273 INFO L226 Difference]: Without dead ends: 78 [2019-10-01 23:41:19,274 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=324, Invalid=326, Unknown=0, NotChecked=0, Total=650 [2019-10-01 23:41:19,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-10-01 23:41:19,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 51. [2019-10-01 23:41:19,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-01 23:41:19,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2019-10-01 23:41:19,282 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 40 [2019-10-01 23:41:19,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:41:19,283 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2019-10-01 23:41:19,283 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-01 23:41:19,283 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2019-10-01 23:41:19,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-01 23:41:19,284 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:41:19,284 INFO L411 BasicCegarLoop]: trace histogram [23, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:41:19,284 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:41:19,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:41:19,285 INFO L82 PathProgramCache]: Analyzing trace with hash 512417733, now seen corresponding path program 9 times [2019-10-01 23:41:19,285 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:41:19,285 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:41:19,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:41:19,287 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:41:19,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:41:19,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:41:19,398 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2019-10-01 23:41:19,399 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:41:19,399 INFO L224 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) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 23:41:19,417 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-01 23:41:19,990 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-01 23:41:19,991 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:41:19,994 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-01 23:41:19,996 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:41:20,018 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2019-10-01 23:41:20,030 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:41:20,030 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-10-01 23:41:20,030 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-01 23:41:20,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-01 23:41:20,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-10-01 23:41:20,031 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 13 states. [2019-10-01 23:41:20,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:41:20,156 INFO L93 Difference]: Finished difference Result 92 states and 105 transitions. [2019-10-01 23:41:20,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-01 23:41:20,157 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 47 [2019-10-01 23:41:20,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:41:20,158 INFO L225 Difference]: With dead ends: 92 [2019-10-01 23:41:20,158 INFO L226 Difference]: Without dead ends: 82 [2019-10-01 23:41:20,159 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-10-01 23:41:20,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-10-01 23:41:20,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2019-10-01 23:41:20,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-01 23:41:20,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2019-10-01 23:41:20,167 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 47 [2019-10-01 23:41:20,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:41:20,167 INFO L475 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2019-10-01 23:41:20,167 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-01 23:41:20,167 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2019-10-01 23:41:20,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-10-01 23:41:20,168 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:41:20,168 INFO L411 BasicCegarLoop]: trace histogram [23, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:41:20,168 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:41:20,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:41:20,169 INFO L82 PathProgramCache]: Analyzing trace with hash 882187050, now seen corresponding path program 10 times [2019-10-01 23:41:20,169 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:41:20,169 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:41:20,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:41:20,170 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:41:20,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:41:20,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:41:20,331 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2019-10-01 23:41:20,331 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:41:20,331 INFO L224 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 [2019-10-01 23:41:20,370 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-01 23:41:20,423 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-01 23:41:20,424 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:41:20,426 INFO L256 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-01 23:41:20,429 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:41:20,780 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-01 23:41:20,789 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:41:20,789 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 26] total 33 [2019-10-01 23:41:20,789 INFO L454 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-01 23:41:20,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-01 23:41:20,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=527, Invalid=529, Unknown=0, NotChecked=0, Total=1056 [2019-10-01 23:41:20,791 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 33 states. [2019-10-01 23:41:21,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:41:21,021 INFO L93 Difference]: Finished difference Result 115 states and 137 transitions. [2019-10-01 23:41:21,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-10-01 23:41:21,022 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 48 [2019-10-01 23:41:21,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:41:21,023 INFO L225 Difference]: With dead ends: 115 [2019-10-01 23:41:21,023 INFO L226 Difference]: Without dead ends: 93 [2019-10-01 23:41:21,024 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=527, Invalid=529, Unknown=0, NotChecked=0, Total=1056 [2019-10-01 23:41:21,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-10-01 23:41:21,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 60. [2019-10-01 23:41:21,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-10-01 23:41:21,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2019-10-01 23:41:21,033 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 48 [2019-10-01 23:41:21,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:41:21,033 INFO L475 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2019-10-01 23:41:21,033 INFO L476 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-10-01 23:41:21,033 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2019-10-01 23:41:21,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-01 23:41:21,034 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:41:21,034 INFO L411 BasicCegarLoop]: trace histogram [30, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:41:21,035 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:41:21,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:41:21,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1562614281, now seen corresponding path program 11 times [2019-10-01 23:41:21,035 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:41:21,035 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:41:21,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:41:21,037 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:41:21,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:41:21,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:41:21,178 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2019-10-01 23:41:21,179 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:41:21,179 INFO L224 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) [2019-10-01 23:41:21,207 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 23:41:51,483 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2019-10-01 23:41:51,484 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:41:51,504 INFO L256 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 32 conjunts are in the unsatisfiable core [2019-10-01 23:41:51,506 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:41:51,772 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-01 23:41:51,786 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:41:51,786 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 33] total 40 [2019-10-01 23:41:51,787 INFO L454 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-10-01 23:41:51,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-10-01 23:41:51,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=779, Invalid=781, Unknown=0, NotChecked=0, Total=1560 [2019-10-01 23:41:51,789 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 40 states. [2019-10-01 23:41:52,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:41:52,130 INFO L93 Difference]: Finished difference Result 127 states and 150 transitions. [2019-10-01 23:41:52,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-10-01 23:41:52,132 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 56 [2019-10-01 23:41:52,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:41:52,134 INFO L225 Difference]: With dead ends: 127 [2019-10-01 23:41:52,134 INFO L226 Difference]: Without dead ends: 104 [2019-10-01 23:41:52,136 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=779, Invalid=781, Unknown=0, NotChecked=0, Total=1560 [2019-10-01 23:41:52,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-10-01 23:41:52,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 68. [2019-10-01 23:41:52,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-10-01 23:41:52,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2019-10-01 23:41:52,145 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 56 [2019-10-01 23:41:52,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:41:52,146 INFO L475 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2019-10-01 23:41:52,146 INFO L476 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-10-01 23:41:52,146 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2019-10-01 23:41:52,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-10-01 23:41:52,147 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:41:52,147 INFO L411 BasicCegarLoop]: trace histogram [37, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:41:52,148 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:41:52,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:41:52,148 INFO L82 PathProgramCache]: Analyzing trace with hash -157347062, now seen corresponding path program 12 times [2019-10-01 23:41:52,148 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:41:52,148 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:41:52,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:41:52,150 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:41:52,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:41:52,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:41:52,347 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-10-01 23:41:52,347 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:41:52,347 INFO L224 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 [2019-10-01 23:41:52,369 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-01 23:42:14,559 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-01 23:42:14,560 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:42:14,575 INFO L256 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-01 23:42:14,577 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:42:14,607 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-10-01 23:42:14,620 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:42:14,620 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-10-01 23:42:14,621 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-01 23:42:14,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-01 23:42:14,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-10-01 23:42:14,621 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 16 states. [2019-10-01 23:42:14,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:42:14,793 INFO L93 Difference]: Finished difference Result 118 states and 134 transitions. [2019-10-01 23:42:14,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-01 23:42:14,794 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 64 [2019-10-01 23:42:14,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:42:14,795 INFO L225 Difference]: With dead ends: 118 [2019-10-01 23:42:14,795 INFO L226 Difference]: Without dead ends: 108 [2019-10-01 23:42:14,796 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-10-01 23:42:14,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-10-01 23:42:14,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 69. [2019-10-01 23:42:14,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-10-01 23:42:14,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2019-10-01 23:42:14,803 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 64 [2019-10-01 23:42:14,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:42:14,804 INFO L475 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2019-10-01 23:42:14,804 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-01 23:42:14,804 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2019-10-01 23:42:14,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-01 23:42:14,805 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:42:14,805 INFO L411 BasicCegarLoop]: trace histogram [37, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:42:14,805 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:42:14,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:42:14,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1594314885, now seen corresponding path program 13 times [2019-10-01 23:42:14,806 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:42:14,806 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:42:14,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:42:14,807 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:42:14,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:42:14,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:42:14,986 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-10-01 23:42:14,986 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:42:14,986 INFO L224 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 [2019-10-01 23:42:15,026 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:42:15,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:42:15,102 INFO L256 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 39 conjunts are in the unsatisfiable core [2019-10-01 23:42:15,105 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:42:15,465 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-10-01 23:42:15,469 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:42:15,470 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 40] total 47 [2019-10-01 23:42:15,471 INFO L454 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-10-01 23:42:15,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-10-01 23:42:15,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1080, Invalid=1082, Unknown=0, NotChecked=0, Total=2162 [2019-10-01 23:42:15,473 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 47 states. [2019-10-01 23:42:15,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:42:15,802 INFO L93 Difference]: Finished difference Result 144 states and 169 transitions. [2019-10-01 23:42:15,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-10-01 23:42:15,803 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 65 [2019-10-01 23:42:15,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:42:15,805 INFO L225 Difference]: With dead ends: 144 [2019-10-01 23:42:15,805 INFO L226 Difference]: Without dead ends: 119 [2019-10-01 23:42:15,807 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1391 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1080, Invalid=1082, Unknown=0, NotChecked=0, Total=2162 [2019-10-01 23:42:15,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-10-01 23:42:15,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 77. [2019-10-01 23:42:15,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-10-01 23:42:15,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2019-10-01 23:42:15,822 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 65 [2019-10-01 23:42:15,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:42:15,822 INFO L475 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2019-10-01 23:42:15,822 INFO L476 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-10-01 23:42:15,822 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2019-10-01 23:42:15,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-10-01 23:42:15,826 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:42:15,826 INFO L411 BasicCegarLoop]: trace histogram [44, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:42:15,827 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:42:15,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:42:15,829 INFO L82 PathProgramCache]: Analyzing trace with hash -2131889850, now seen corresponding path program 14 times [2019-10-01 23:42:15,829 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:42:15,829 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:42:15,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:42:15,830 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:42:15,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:42:15,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:42:16,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1095 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2019-10-01 23:42:16,035 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:42:16,035 INFO L224 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 [2019-10-01 23:42:16,078 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-01 23:42:16,139 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-01 23:42:16,139 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:42:16,141 INFO L256 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 46 conjunts are in the unsatisfiable core [2019-10-01 23:42:16,142 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:42:16,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1095 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-10-01 23:42:16,479 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:42:16,479 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 47] total 54 [2019-10-01 23:42:16,480 INFO L454 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-10-01 23:42:16,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-10-01 23:42:16,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1430, Invalid=1432, Unknown=0, NotChecked=0, Total=2862 [2019-10-01 23:42:16,484 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 54 states. [2019-10-01 23:42:16,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:42:16,921 INFO L93 Difference]: Finished difference Result 156 states and 182 transitions. [2019-10-01 23:42:16,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-10-01 23:42:16,924 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 73 [2019-10-01 23:42:16,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:42:16,925 INFO L225 Difference]: With dead ends: 156 [2019-10-01 23:42:16,926 INFO L226 Difference]: Without dead ends: 130 [2019-10-01 23:42:16,927 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1903 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1430, Invalid=1432, Unknown=0, NotChecked=0, Total=2862 [2019-10-01 23:42:16,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-10-01 23:42:16,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 85. [2019-10-01 23:42:16,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-10-01 23:42:16,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2019-10-01 23:42:16,933 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 73 [2019-10-01 23:42:16,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:42:16,933 INFO L475 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2019-10-01 23:42:16,933 INFO L476 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-10-01 23:42:16,933 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2019-10-01 23:42:16,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-01 23:42:16,934 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:42:16,934 INFO L411 BasicCegarLoop]: trace histogram [51, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:42:16,934 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:42:16,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:42:16,935 INFO L82 PathProgramCache]: Analyzing trace with hash 463260837, now seen corresponding path program 15 times [2019-10-01 23:42:16,935 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:42:16,935 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:42:16,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:42:16,936 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:42:16,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:42:16,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:42:17,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1446 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 1326 trivial. 0 not checked. [2019-10-01 23:42:17,163 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:42:17,163 INFO L224 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 [2019-10-01 23:42:17,189 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-01 23:42:27,457 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-10-01 23:42:27,458 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:42:27,466 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-01 23:42:27,468 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:42:27,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1446 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 1326 trivial. 0 not checked. [2019-10-01 23:42:27,492 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:42:27,492 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-10-01 23:42:27,492 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-01 23:42:27,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-01 23:42:27,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-10-01 23:42:27,493 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 19 states. [2019-10-01 23:42:27,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:42:27,687 INFO L93 Difference]: Finished difference Result 144 states and 163 transitions. [2019-10-01 23:42:27,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-01 23:42:27,690 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 81 [2019-10-01 23:42:27,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:42:27,691 INFO L225 Difference]: With dead ends: 144 [2019-10-01 23:42:27,691 INFO L226 Difference]: Without dead ends: 134 [2019-10-01 23:42:27,692 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-10-01 23:42:27,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-10-01 23:42:27,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 86. [2019-10-01 23:42:27,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-10-01 23:42:27,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2019-10-01 23:42:27,698 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 81 [2019-10-01 23:42:27,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:42:27,699 INFO L475 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2019-10-01 23:42:27,699 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-01 23:42:27,699 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2019-10-01 23:42:27,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-10-01 23:42:27,700 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:42:27,700 INFO L411 BasicCegarLoop]: trace histogram [51, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:42:27,700 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:42:27,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:42:27,700 INFO L82 PathProgramCache]: Analyzing trace with hash -641676726, now seen corresponding path program 16 times [2019-10-01 23:42:27,701 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:42:27,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:42:27,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:42:27,702 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:42:27,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:42:27,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:42:27,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1462 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 1326 trivial. 0 not checked. [2019-10-01 23:42:27,930 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:42:27,930 INFO L224 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 [2019-10-01 23:42:27,970 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-01 23:42:28,056 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-01 23:42:28,057 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:42:28,059 INFO L256 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 53 conjunts are in the unsatisfiable core [2019-10-01 23:42:28,062 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:42:28,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1462 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-10-01 23:42:28,460 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:42:28,461 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 54] total 61 [2019-10-01 23:42:28,461 INFO L454 AbstractCegarLoop]: Interpolant automaton has 61 states [2019-10-01 23:42:28,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2019-10-01 23:42:28,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1829, Invalid=1831, Unknown=0, NotChecked=0, Total=3660 [2019-10-01 23:42:28,463 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 61 states. [2019-10-01 23:42:28,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:42:28,988 INFO L93 Difference]: Finished difference Result 173 states and 201 transitions. [2019-10-01 23:42:28,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2019-10-01 23:42:28,989 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 82 [2019-10-01 23:42:28,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:42:28,991 INFO L225 Difference]: With dead ends: 173 [2019-10-01 23:42:28,991 INFO L226 Difference]: Without dead ends: 145 [2019-10-01 23:42:28,993 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2485 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1829, Invalid=1831, Unknown=0, NotChecked=0, Total=3660 [2019-10-01 23:42:28,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-10-01 23:42:28,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 94. [2019-10-01 23:42:28,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-10-01 23:42:29,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2019-10-01 23:42:29,000 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 82 [2019-10-01 23:42:29,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:42:29,000 INFO L475 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2019-10-01 23:42:29,001 INFO L476 AbstractCegarLoop]: Interpolant automaton has 61 states. [2019-10-01 23:42:29,001 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2019-10-01 23:42:29,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-10-01 23:42:29,001 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:42:29,002 INFO L411 BasicCegarLoop]: trace histogram [58, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:42:29,002 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:42:29,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:42:29,002 INFO L82 PathProgramCache]: Analyzing trace with hash -575314455, now seen corresponding path program 17 times [2019-10-01 23:42:29,002 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:42:29,003 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:42:29,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:42:29,004 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:42:29,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:42:29,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:42:29,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1864 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2019-10-01 23:42:29,279 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:42:29,279 INFO L224 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 [2019-10-01 23:42:29,330 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-01 23:44:06,968 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2019-10-01 23:44:06,969 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:44:06,997 INFO L256 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-01 23:44:06,999 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:44:07,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1864 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2019-10-01 23:44:07,036 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:44:07,037 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-10-01 23:44:07,037 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-01 23:44:07,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-01 23:44:07,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-10-01 23:44:07,038 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 21 states. [2019-10-01 23:44:07,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:44:07,264 INFO L93 Difference]: Finished difference Result 159 states and 180 transitions. [2019-10-01 23:44:07,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-01 23:44:07,266 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 90 [2019-10-01 23:44:07,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:44:07,267 INFO L225 Difference]: With dead ends: 159 [2019-10-01 23:44:07,268 INFO L226 Difference]: Without dead ends: 149 [2019-10-01 23:44:07,268 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-10-01 23:44:07,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-10-01 23:44:07,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 95. [2019-10-01 23:44:07,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-10-01 23:44:07,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2019-10-01 23:44:07,275 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 90 [2019-10-01 23:44:07,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:44:07,275 INFO L475 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2019-10-01 23:44:07,275 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-01 23:44:07,276 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2019-10-01 23:44:07,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-10-01 23:44:07,276 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:44:07,277 INFO L411 BasicCegarLoop]: trace histogram [58, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:44:07,277 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:44:07,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:44:07,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1522227590, now seen corresponding path program 18 times [2019-10-01 23:44:07,277 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:44:07,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:44:07,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:44:07,279 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:44:07,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:44:07,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:44:07,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1882 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2019-10-01 23:44:07,547 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:44:07,547 INFO L224 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 [2019-10-01 23:44:07,586 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-01 23:45:03,234 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-10-01 23:45:03,234 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:45:03,256 INFO L256 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-01 23:45:03,259 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:45:03,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1882 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2019-10-01 23:45:03,293 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:45:03,293 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-10-01 23:45:03,294 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-01 23:45:03,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-01 23:45:03,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-10-01 23:45:03,295 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 22 states. [2019-10-01 23:45:03,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:45:03,572 INFO L93 Difference]: Finished difference Result 163 states and 185 transitions. [2019-10-01 23:45:03,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-01 23:45:03,573 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 91 [2019-10-01 23:45:03,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:45:03,575 INFO L225 Difference]: With dead ends: 163 [2019-10-01 23:45:03,575 INFO L226 Difference]: Without dead ends: 153 [2019-10-01 23:45:03,575 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-10-01 23:45:03,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-10-01 23:45:03,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 96. [2019-10-01 23:45:03,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-10-01 23:45:03,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2019-10-01 23:45:03,582 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 91 [2019-10-01 23:45:03,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:45:03,582 INFO L475 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2019-10-01 23:45:03,582 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-01 23:45:03,582 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2019-10-01 23:45:03,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-10-01 23:45:03,583 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:45:03,583 INFO L411 BasicCegarLoop]: trace histogram [58, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:45:03,584 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:45:03,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:45:03,584 INFO L82 PathProgramCache]: Analyzing trace with hash 2121521545, now seen corresponding path program 19 times [2019-10-01 23:45:03,584 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:45:03,584 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:45:03,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:45:03,585 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:45:03,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:45:03,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:45:03,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1901 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2019-10-01 23:45:03,894 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:45:03,894 INFO L224 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 [2019-10-01 23:45:03,930 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:45:04,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:45:04,016 INFO L256 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 60 conjunts are in the unsatisfiable core [2019-10-01 23:45:04,018 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:45:04,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1901 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (20)] Exception during sending of exit command (exit): Broken pipe [2019-10-01 23:45:04,462 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:45:04,463 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 61] total 70 [2019-10-01 23:45:04,463 INFO L454 AbstractCegarLoop]: Interpolant automaton has 70 states [2019-10-01 23:45:04,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2019-10-01 23:45:04,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2414, Invalid=2416, Unknown=0, NotChecked=0, Total=4830 [2019-10-01 23:45:04,466 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 70 states. [2019-10-01 23:45:05,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:45:05,160 INFO L93 Difference]: Finished difference Result 197 states and 230 transitions. [2019-10-01 23:45:05,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2019-10-01 23:45:05,166 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 92 [2019-10-01 23:45:05,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:45:05,167 INFO L225 Difference]: With dead ends: 197 [2019-10-01 23:45:05,167 INFO L226 Difference]: Without dead ends: 166 [2019-10-01 23:45:05,169 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3349 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=2414, Invalid=2416, Unknown=0, NotChecked=0, Total=4830 [2019-10-01 23:45:05,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2019-10-01 23:45:05,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 106. [2019-10-01 23:45:05,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-10-01 23:45:05,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2019-10-01 23:45:05,176 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 92 [2019-10-01 23:45:05,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:45:05,176 INFO L475 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2019-10-01 23:45:05,176 INFO L476 AbstractCegarLoop]: Interpolant automaton has 70 states. [2019-10-01 23:45:05,176 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2019-10-01 23:45:05,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-10-01 23:45:05,177 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:45:05,177 INFO L411 BasicCegarLoop]: trace histogram [67, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:45:05,178 INFO L418 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:45:05,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:45:05,178 INFO L82 PathProgramCache]: Analyzing trace with hash -532214518, now seen corresponding path program 20 times [2019-10-01 23:45:05,178 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:45:05,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:45:05,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:45:05,180 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:45:05,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:45:05,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:45:05,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2488 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 2278 trivial. 0 not checked. [2019-10-01 23:45:05,461 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:45:05,461 INFO L224 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 [2019-10-01 23:45:05,496 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-01 23:45:05,588 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-01 23:45:05,589 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:45:05,591 INFO L256 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 69 conjunts are in the unsatisfiable core [2019-10-01 23:45:05,593 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:45:06,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2488 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-10-01 23:45:06,216 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:45:06,216 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 70] total 78 [2019-10-01 23:45:06,217 INFO L454 AbstractCegarLoop]: Interpolant automaton has 78 states [2019-10-01 23:45:06,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2019-10-01 23:45:06,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3002, Invalid=3004, Unknown=0, NotChecked=0, Total=6006 [2019-10-01 23:45:06,219 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 78 states. [2019-10-01 23:45:06,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:45:06,898 INFO L93 Difference]: Finished difference Result 210 states and 243 transitions. [2019-10-01 23:45:06,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2019-10-01 23:45:06,899 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 102 [2019-10-01 23:45:06,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:45:06,900 INFO L225 Difference]: With dead ends: 210 [2019-10-01 23:45:06,900 INFO L226 Difference]: Without dead ends: 178 [2019-10-01 23:45:06,903 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4237 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=3002, Invalid=3004, Unknown=0, NotChecked=0, Total=6006 [2019-10-01 23:45:06,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-10-01 23:45:06,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 115. [2019-10-01 23:45:06,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-10-01 23:45:06,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2019-10-01 23:45:06,911 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 102 [2019-10-01 23:45:06,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:45:06,911 INFO L475 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2019-10-01 23:45:06,911 INFO L476 AbstractCegarLoop]: Interpolant automaton has 78 states. [2019-10-01 23:45:06,911 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2019-10-01 23:45:06,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-10-01 23:45:06,912 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:45:06,912 INFO L411 BasicCegarLoop]: trace histogram [75, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:45:06,912 INFO L418 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:45:06,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:45:06,913 INFO L82 PathProgramCache]: Analyzing trace with hash 242739333, now seen corresponding path program 21 times [2019-10-01 23:45:06,913 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:45:06,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:45:06,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:45:06,914 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:45:06,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:45:06,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:45:07,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 2850 trivial. 0 not checked. [2019-10-01 23:45:07,268 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:45:07,268 INFO L224 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 [2019-10-01 23:45:07,325 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-01 23:45:36,376 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-10-01 23:45:36,377 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:45:36,391 INFO L256 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-01 23:45:36,392 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:45:36,408 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 2850 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (22)] Exception during sending of exit command (exit): Broken pipe [2019-10-01 23:45:36,422 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:45:36,423 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-10-01 23:45:36,423 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-01 23:45:36,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-01 23:45:36,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-10-01 23:45:36,424 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 25 states. [2019-10-01 23:45:36,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:45:36,748 INFO L93 Difference]: Finished difference Result 192 states and 217 transitions. [2019-10-01 23:45:36,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-01 23:45:36,749 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 111 [2019-10-01 23:45:36,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:45:36,750 INFO L225 Difference]: With dead ends: 192 [2019-10-01 23:45:36,751 INFO L226 Difference]: Without dead ends: 182 [2019-10-01 23:45:36,751 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-10-01 23:45:36,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-10-01 23:45:36,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 116. [2019-10-01 23:45:36,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-10-01 23:45:36,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2019-10-01 23:45:36,760 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 111 [2019-10-01 23:45:36,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:45:36,761 INFO L475 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2019-10-01 23:45:36,761 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-01 23:45:36,761 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2019-10-01 23:45:36,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-10-01 23:45:36,762 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:45:36,763 INFO L411 BasicCegarLoop]: trace histogram [75, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:45:36,763 INFO L418 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:45:36,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:45:36,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1112091242, now seen corresponding path program 22 times [2019-10-01 23:45:36,764 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:45:36,764 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:45:36,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:45:36,766 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:45:36,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:45:36,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:45:37,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3103 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2850 trivial. 0 not checked. [2019-10-01 23:45:37,098 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:45:37,098 INFO L224 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 [2019-10-01 23:45:37,140 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-01 23:45:37,255 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-01 23:45:37,255 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:45:37,257 INFO L256 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 77 conjunts are in the unsatisfiable core [2019-10-01 23:45:37,260 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:45:38,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3103 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-01 23:45:38,030 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:45:38,030 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 78] total 87 [2019-10-01 23:45:38,031 INFO L454 AbstractCegarLoop]: Interpolant automaton has 87 states [2019-10-01 23:45:38,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2019-10-01 23:45:38,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3740, Invalid=3742, Unknown=0, NotChecked=0, Total=7482 [2019-10-01 23:45:38,033 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand 87 states. [2019-10-01 23:45:38,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:45:38,683 INFO L93 Difference]: Finished difference Result 229 states and 265 transitions. [2019-10-01 23:45:38,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2019-10-01 23:45:38,683 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 112 [2019-10-01 23:45:38,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:45:38,686 INFO L225 Difference]: With dead ends: 229 [2019-10-01 23:45:38,686 INFO L226 Difference]: Without dead ends: 195 [2019-10-01 23:45:38,688 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5349 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=3740, Invalid=3742, Unknown=0, NotChecked=0, Total=7482 [2019-10-01 23:45:38,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-10-01 23:45:38,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 126. [2019-10-01 23:45:38,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-10-01 23:45:38,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2019-10-01 23:45:38,695 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 112 [2019-10-01 23:45:38,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:45:38,696 INFO L475 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2019-10-01 23:45:38,696 INFO L476 AbstractCegarLoop]: Interpolant automaton has 87 states. [2019-10-01 23:45:38,696 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2019-10-01 23:45:38,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-10-01 23:45:38,697 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:45:38,697 INFO L411 BasicCegarLoop]: trace histogram [84, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:45:38,697 INFO L418 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:45:38,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:45:38,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1153883721, now seen corresponding path program 23 times [2019-10-01 23:45:38,698 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:45:38,698 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:45:38,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:45:38,699 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:45:38,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:45:38,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:45:39,140 INFO L134 CoverageAnalysis]: Checked inductivity of 3846 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 3570 trivial. 0 not checked. [2019-10-01 23:45:39,141 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:45:39,141 INFO L224 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 [2019-10-01 23:45:39,198 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-01 23:48:32,549 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2019-10-01 23:48:32,549 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:48:32,610 INFO L256 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 86 conjunts are in the unsatisfiable core [2019-10-01 23:48:32,613 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:48:33,297 INFO L134 CoverageAnalysis]: Checked inductivity of 3846 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2019-10-01 23:48:33,326 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:48:33,327 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 87] total 95 [2019-10-01 23:48:33,327 INFO L454 AbstractCegarLoop]: Interpolant automaton has 95 states [2019-10-01 23:48:33,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2019-10-01 23:48:33,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4464, Invalid=4466, Unknown=0, NotChecked=0, Total=8930 [2019-10-01 23:48:33,329 INFO L87 Difference]: Start difference. First operand 126 states and 128 transitions. Second operand 95 states. [2019-10-01 23:48:34,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:48:34,060 INFO L93 Difference]: Finished difference Result 242 states and 278 transitions. [2019-10-01 23:48:34,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2019-10-01 23:48:34,061 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 122 [2019-10-01 23:48:34,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:48:34,062 INFO L225 Difference]: With dead ends: 242 [2019-10-01 23:48:34,063 INFO L226 Difference]: Without dead ends: 207 [2019-10-01 23:48:34,065 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6457 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=4464, Invalid=4466, Unknown=0, NotChecked=0, Total=8930 [2019-10-01 23:48:34,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2019-10-01 23:48:34,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 135. [2019-10-01 23:48:34,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-10-01 23:48:34,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2019-10-01 23:48:34,072 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 122 [2019-10-01 23:48:34,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:48:34,072 INFO L475 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2019-10-01 23:48:34,072 INFO L476 AbstractCegarLoop]: Interpolant automaton has 95 states. [2019-10-01 23:48:34,072 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2019-10-01 23:48:34,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-01 23:48:34,073 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:48:34,073 INFO L411 BasicCegarLoop]: trace histogram [92, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:48:34,074 INFO L418 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:48:34,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:48:34,074 INFO L82 PathProgramCache]: Analyzing trace with hash 840253222, now seen corresponding path program 24 times [2019-10-01 23:48:34,074 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:48:34,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:48:34,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:48:34,076 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:48:34,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:48:34,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:48:34,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4578 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 4278 trivial. 0 not checked. [2019-10-01 23:48:34,603 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:48:34,603 INFO L224 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 [2019-10-01 23:48:34,688 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-01 23:51:19,688 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-10-01 23:51:19,688 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:51:19,742 INFO L256 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-01 23:51:19,745 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:51:19,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4578 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 4278 trivial. 0 not checked. [2019-10-01 23:51:19,817 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:51:19,817 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-10-01 23:51:19,818 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-01 23:51:19,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-01 23:51:19,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-10-01 23:51:19,818 INFO L87 Difference]: Start difference. First operand 135 states and 137 transitions. Second operand 28 states. [2019-10-01 23:51:20,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:51:20,230 INFO L93 Difference]: Finished difference Result 221 states and 249 transitions. [2019-10-01 23:51:20,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-01 23:51:20,231 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 131 [2019-10-01 23:51:20,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:51:20,234 INFO L225 Difference]: With dead ends: 221 [2019-10-01 23:51:20,234 INFO L226 Difference]: Without dead ends: 211 [2019-10-01 23:51:20,235 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-10-01 23:51:20,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2019-10-01 23:51:20,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 136. [2019-10-01 23:51:20,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-10-01 23:51:20,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2019-10-01 23:51:20,247 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 131 [2019-10-01 23:51:20,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:51:20,247 INFO L475 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2019-10-01 23:51:20,247 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-01 23:51:20,247 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2019-10-01 23:51:20,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-01 23:51:20,249 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:51:20,249 INFO L411 BasicCegarLoop]: trace histogram [92, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:51:20,249 INFO L418 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:51:20,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:51:20,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1839814679, now seen corresponding path program 25 times [2019-10-01 23:51:20,251 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:51:20,252 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:51:20,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:51:20,256 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:51:20,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:51:20,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:51:20,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4603 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 4278 trivial. 0 not checked. [2019-10-01 23:51:20,872 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:51:20,873 INFO L224 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 [2019-10-01 23:51:20,932 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:51:21,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:51:21,042 INFO L256 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 94 conjunts are in the unsatisfiable core [2019-10-01 23:51:21,048 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:51:22,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4603 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2019-10-01 23:51:22,181 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:51:22,181 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 95] total 103 [2019-10-01 23:51:22,182 INFO L454 AbstractCegarLoop]: Interpolant automaton has 103 states [2019-10-01 23:51:22,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2019-10-01 23:51:22,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5252, Invalid=5254, Unknown=0, NotChecked=0, Total=10506 [2019-10-01 23:51:22,186 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand 103 states. [2019-10-01 23:51:23,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:51:23,188 INFO L93 Difference]: Finished difference Result 260 states and 298 transitions. [2019-10-01 23:51:23,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2019-10-01 23:51:23,188 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 132 [2019-10-01 23:51:23,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:51:23,190 INFO L225 Difference]: With dead ends: 260 [2019-10-01 23:51:23,191 INFO L226 Difference]: Without dead ends: 223 [2019-10-01 23:51:23,192 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7657 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=5252, Invalid=5254, Unknown=0, NotChecked=0, Total=10506 [2019-10-01 23:51:23,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2019-10-01 23:51:23,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 145. [2019-10-01 23:51:23,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-10-01 23:51:23,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 147 transitions. [2019-10-01 23:51:23,201 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 147 transitions. Word has length 132 [2019-10-01 23:51:23,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:51:23,201 INFO L475 AbstractCegarLoop]: Abstraction has 145 states and 147 transitions. [2019-10-01 23:51:23,201 INFO L476 AbstractCegarLoop]: Interpolant automaton has 103 states. [2019-10-01 23:51:23,201 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 147 transitions. [2019-10-01 23:51:23,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-01 23:51:23,202 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:51:23,202 INFO L411 BasicCegarLoop]: trace histogram [100, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:51:23,202 INFO L418 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:51:23,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:51:23,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1128257146, now seen corresponding path program 26 times [2019-10-01 23:51:23,203 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:51:23,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:51:23,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:51:23,205 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:51:23,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:51:23,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:51:23,762 INFO L134 CoverageAnalysis]: Checked inductivity of 5401 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 5050 trivial. 0 not checked. [2019-10-01 23:51:23,762 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:51:23,762 INFO L224 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 [2019-10-01 23:51:23,845 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-01 23:51:23,989 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-01 23:51:23,990 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:51:23,996 INFO L256 TraceCheckSpWp]: Trace formula consists of 823 conjuncts, 102 conjunts are in the unsatisfiable core [2019-10-01 23:51:24,002 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:51:24,929 INFO L134 CoverageAnalysis]: Checked inductivity of 5401 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2019-10-01 23:51:24,934 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:51:24,935 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 103] total 111 [2019-10-01 23:51:24,935 INFO L454 AbstractCegarLoop]: Interpolant automaton has 111 states [2019-10-01 23:51:24,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2019-10-01 23:51:24,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6104, Invalid=6106, Unknown=0, NotChecked=0, Total=12210 [2019-10-01 23:51:24,938 INFO L87 Difference]: Start difference. First operand 145 states and 147 transitions. Second operand 111 states. [2019-10-01 23:51:26,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:51:26,073 INFO L93 Difference]: Finished difference Result 273 states and 312 transitions. [2019-10-01 23:51:26,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2019-10-01 23:51:26,074 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 141 [2019-10-01 23:51:26,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:51:26,075 INFO L225 Difference]: With dead ends: 273 [2019-10-01 23:51:26,076 INFO L226 Difference]: Without dead ends: 235 [2019-10-01 23:51:26,077 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8965 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=6104, Invalid=6106, Unknown=0, NotChecked=0, Total=12210 [2019-10-01 23:51:26,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2019-10-01 23:51:26,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 154. [2019-10-01 23:51:26,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-10-01 23:51:26,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 156 transitions. [2019-10-01 23:51:26,085 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 156 transitions. Word has length 141 [2019-10-01 23:51:26,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:51:26,086 INFO L475 AbstractCegarLoop]: Abstraction has 154 states and 156 transitions. [2019-10-01 23:51:26,086 INFO L476 AbstractCegarLoop]: Interpolant automaton has 111 states. [2019-10-01 23:51:26,086 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 156 transitions. [2019-10-01 23:51:26,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-10-01 23:51:26,087 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:51:26,087 INFO L411 BasicCegarLoop]: trace histogram [108, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:51:26,087 INFO L418 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:51:26,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:51:26,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1778944119, now seen corresponding path program 27 times [2019-10-01 23:51:26,088 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:51:26,088 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:51:26,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:51:26,089 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:51:26,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:51:26,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:51:26,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6264 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 5886 trivial. 0 not checked. [2019-10-01 23:51:26,640 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:51:26,640 INFO L224 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 [2019-10-01 23:51:26,698 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-01 23:52:37,582 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-10-01 23:52:37,582 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:52:37,615 INFO L256 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-01 23:52:37,618 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:52:37,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6264 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 5886 trivial. 0 not checked. [2019-10-01 23:52:37,694 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:52:37,695 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2019-10-01 23:52:37,695 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-01 23:52:37,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-01 23:52:37,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-10-01 23:52:37,696 INFO L87 Difference]: Start difference. First operand 154 states and 156 transitions. Second operand 31 states. [2019-10-01 23:52:38,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:52:38,176 INFO L93 Difference]: Finished difference Result 249 states and 280 transitions. [2019-10-01 23:52:38,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-01 23:52:38,177 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 150 [2019-10-01 23:52:38,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:52:38,179 INFO L225 Difference]: With dead ends: 249 [2019-10-01 23:52:38,179 INFO L226 Difference]: Without dead ends: 239 [2019-10-01 23:52:38,182 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-10-01 23:52:38,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2019-10-01 23:52:38,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 155. [2019-10-01 23:52:38,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-10-01 23:52:38,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 157 transitions. [2019-10-01 23:52:38,192 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 157 transitions. Word has length 150 [2019-10-01 23:52:38,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:52:38,192 INFO L475 AbstractCegarLoop]: Abstraction has 155 states and 157 transitions. [2019-10-01 23:52:38,192 INFO L476 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-01 23:52:38,192 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 157 transitions. [2019-10-01 23:52:38,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-10-01 23:52:38,193 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:52:38,193 INFO L411 BasicCegarLoop]: trace histogram [108, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:52:38,194 INFO L418 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:52:38,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:52:38,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1430553626, now seen corresponding path program 28 times [2019-10-01 23:52:38,195 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:52:38,195 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:52:38,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:52:38,196 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:52:38,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:52:38,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:52:38,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6292 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 5886 trivial. 0 not checked. [2019-10-01 23:52:38,779 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:52:38,779 INFO L224 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 [2019-10-01 23:52:38,846 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-01 23:52:38,973 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-01 23:52:38,974 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:52:38,978 INFO L256 TraceCheckSpWp]: Trace formula consists of 883 conjuncts, 110 conjunts are in the unsatisfiable core [2019-10-01 23:52:38,981 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:52:40,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6292 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (29)] Exception during sending of exit command (exit): Broken pipe [2019-10-01 23:52:40,032 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:52:40,033 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 111] total 119 [2019-10-01 23:52:40,033 INFO L454 AbstractCegarLoop]: Interpolant automaton has 119 states [2019-10-01 23:52:40,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2019-10-01 23:52:40,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7020, Invalid=7022, Unknown=0, NotChecked=0, Total=14042 [2019-10-01 23:52:40,036 INFO L87 Difference]: Start difference. First operand 155 states and 157 transitions. Second operand 119 states. [2019-10-01 23:52:41,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:52:41,421 INFO L93 Difference]: Finished difference Result 291 states and 332 transitions. [2019-10-01 23:52:41,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2019-10-01 23:52:41,421 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 151 [2019-10-01 23:52:41,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:52:41,424 INFO L225 Difference]: With dead ends: 291 [2019-10-01 23:52:41,424 INFO L226 Difference]: Without dead ends: 251 [2019-10-01 23:52:41,425 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10373 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=7020, Invalid=7022, Unknown=0, NotChecked=0, Total=14042 [2019-10-01 23:52:41,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2019-10-01 23:52:41,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 164. [2019-10-01 23:52:41,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2019-10-01 23:52:41,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 166 transitions. [2019-10-01 23:52:41,434 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 166 transitions. Word has length 151 [2019-10-01 23:52:41,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:52:41,435 INFO L475 AbstractCegarLoop]: Abstraction has 164 states and 166 transitions. [2019-10-01 23:52:41,435 INFO L476 AbstractCegarLoop]: Interpolant automaton has 119 states. [2019-10-01 23:52:41,435 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 166 transitions. [2019-10-01 23:52:41,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-10-01 23:52:41,436 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:52:41,436 INFO L411 BasicCegarLoop]: trace histogram [116, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:52:41,436 INFO L418 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:52:41,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:52:41,437 INFO L82 PathProgramCache]: Analyzing trace with hash -625675991, now seen corresponding path program 29 times [2019-10-01 23:52:41,437 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:52:41,437 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:52:41,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:52:41,439 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:52:41,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:52:41,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:52:42,019 INFO L134 CoverageAnalysis]: Checked inductivity of 7221 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 6786 trivial. 0 not checked. [2019-10-01 23:52:42,020 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:52:42,020 INFO L224 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 [2019-10-01 23:52:42,084 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1