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/recursive/MultCommutative-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-08 06:12:44,950 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-08 06:12:44,952 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-08 06:12:44,963 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-08 06:12:44,964 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-08 06:12:44,965 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-08 06:12:44,966 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-08 06:12:44,968 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-08 06:12:44,970 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-08 06:12:44,971 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-08 06:12:44,972 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-08 06:12:44,973 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-08 06:12:44,973 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-08 06:12:44,974 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-08 06:12:44,975 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-08 06:12:44,976 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-08 06:12:44,977 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-08 06:12:44,978 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-08 06:12:44,980 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-08 06:12:44,982 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-08 06:12:44,983 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-08 06:12:44,984 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-08 06:12:44,985 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-08 06:12:44,986 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-08 06:12:44,988 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-08 06:12:44,997 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-08 06:12:44,998 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-08 06:12:44,998 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-08 06:12:44,999 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-09-08 06:12:45,018 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-08 06:12:45,018 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-08 06:12:45,019 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-08 06:12:45,019 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-08 06:12:45,020 INFO L138 SettingsManager]: * Use SBE=true [2019-09-08 06:12:45,020 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-08 06:12:45,020 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-08 06:12:45,020 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-08 06:12:45,020 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-08 06:12:45,021 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-08 06:12:45,021 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-08 06:12:45,021 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-08 06:12:45,021 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-08 06:12:45,021 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-08 06:12:45,022 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-08 06:12:45,022 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-08 06:12:45,022 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-08 06:12:45,022 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-08 06:12:45,023 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-08 06:12:45,023 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-08 06:12:45,023 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-08 06:12:45,023 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-08 06:12:45,023 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-08 06:12:45,024 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-08 06:12:45,024 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-08 06:12:45,024 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-08 06:12:45,024 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-08 06:12:45,024 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-08 06:12:45,025 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-08 06:12:45,053 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-08 06:12:45,071 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-08 06:12:45,075 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-08 06:12:45,077 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-08 06:12:45,077 INFO L275 PluginConnector]: CDTParser initialized [2019-09-08 06:12:45,078 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/MultCommutative-2.c [2019-09-08 06:12:45,158 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/489374e54/ebdec16d45b14804b0f47b5356f156b8/FLAGa4fcb156e [2019-09-08 06:12:45,623 INFO L306 CDTParser]: Found 1 translation units. [2019-09-08 06:12:45,624 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/MultCommutative-2.c [2019-09-08 06:12:45,630 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/489374e54/ebdec16d45b14804b0f47b5356f156b8/FLAGa4fcb156e [2019-09-08 06:12:46,053 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/489374e54/ebdec16d45b14804b0f47b5356f156b8 [2019-09-08 06:12:46,065 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-08 06:12:46,067 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-08 06:12:46,068 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-08 06:12:46,068 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-08 06:12:46,071 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-08 06:12:46,071 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 06:12:46" (1/1) ... [2019-09-08 06:12:46,074 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4490efcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:12:46, skipping insertion in model container [2019-09-08 06:12:46,074 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 06:12:46" (1/1) ... [2019-09-08 06:12:46,079 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-08 06:12:46,093 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-08 06:12:46,276 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 06:12:46,280 INFO L188 MainTranslator]: Completed pre-run [2019-09-08 06:12:46,298 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 06:12:46,313 INFO L192 MainTranslator]: Completed translation [2019-09-08 06:12:46,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:12:46 WrapperNode [2019-09-08 06:12:46,314 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-08 06:12:46,315 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-08 06:12:46,315 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-08 06:12:46,315 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-08 06:12:46,422 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:12:46" (1/1) ... [2019-09-08 06:12:46,423 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:12:46" (1/1) ... [2019-09-08 06:12:46,432 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:12:46" (1/1) ... [2019-09-08 06:12:46,433 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:12:46" (1/1) ... [2019-09-08 06:12:46,437 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:12:46" (1/1) ... [2019-09-08 06:12:46,439 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:12:46" (1/1) ... [2019-09-08 06:12:46,440 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:12:46" (1/1) ... [2019-09-08 06:12:46,441 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-08 06:12:46,442 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-08 06:12:46,442 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-08 06:12:46,442 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-08 06:12:46,442 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:12:46" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-08 06:12:46,490 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-08 06:12:46,491 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-08 06:12:46,491 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2019-09-08 06:12:46,491 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-08 06:12:46,491 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-08 06:12:46,491 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-08 06:12:46,491 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2019-09-08 06:12:46,492 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-08 06:12:46,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-08 06:12:46,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-08 06:12:46,711 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-08 06:12:46,715 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-08 06:12:46,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 06:12:46 BoogieIcfgContainer [2019-09-08 06:12:46,717 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-08 06:12:46,718 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-08 06:12:46,719 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-08 06:12:46,731 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-08 06:12:46,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.09 06:12:46" (1/3) ... [2019-09-08 06:12:46,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eb125b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 06:12:46, skipping insertion in model container [2019-09-08 06:12:46,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:12:46" (2/3) ... [2019-09-08 06:12:46,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eb125b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 06:12:46, skipping insertion in model container [2019-09-08 06:12:46,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 06:12:46" (3/3) ... [2019-09-08 06:12:46,739 INFO L109 eAbstractionObserver]: Analyzing ICFG MultCommutative-2.c [2019-09-08 06:12:46,752 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-08 06:12:46,769 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-08 06:12:46,797 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-08 06:12:46,826 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-08 06:12:46,827 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-08 06:12:46,827 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-08 06:12:46,827 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-08 06:12:46,828 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-08 06:12:46,828 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-08 06:12:46,828 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-08 06:12:46,828 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-08 06:12:46,828 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-08 06:12:46,847 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2019-09-08 06:12:46,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-09-08 06:12:46,853 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:12:46,854 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:12:46,856 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:12:46,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:12:46,861 INFO L82 PathProgramCache]: Analyzing trace with hash -962219036, now seen corresponding path program 1 times [2019-09-08 06:12:46,862 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:12:46,863 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:12:46,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:46,900 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:12:46,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:46,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:12:47,046 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-08 06:12:47,049 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:12:47,049 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:12:47,073 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:12:47,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:12:47,128 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-08 06:12:47,135 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:12:47,165 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-08 06:12:47,177 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:12:47,178 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2019-09-08 06:12:47,184 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-08 06:12:47,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-08 06:12:47,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-08 06:12:47,202 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 5 states. [2019-09-08 06:12:47,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:12:47,366 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2019-09-08 06:12:47,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-08 06:12:47,368 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2019-09-08 06:12:47,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:12:47,378 INFO L225 Difference]: With dead ends: 41 [2019-09-08 06:12:47,378 INFO L226 Difference]: Without dead ends: 25 [2019-09-08 06:12:47,382 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-08 06:12:47,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-09-08 06:12:47,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-09-08 06:12:47,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-09-08 06:12:47,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2019-09-08 06:12:47,432 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 23 [2019-09-08 06:12:47,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:12:47,432 INFO L475 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2019-09-08 06:12:47,432 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-08 06:12:47,433 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2019-09-08 06:12:47,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-09-08 06:12:47,436 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:12:47,436 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:12:47,436 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:12:47,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:12:47,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1472914703, now seen corresponding path program 1 times [2019-09-08 06:12:47,437 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:12:47,437 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:12:47,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:47,439 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:12:47,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:47,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:12:47,540 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-09-08 06:12:47,541 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 06:12:47,541 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-08 06:12:47,542 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-08 06:12:47,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-08 06:12:47,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-08 06:12:47,543 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand 5 states. [2019-09-08 06:12:47,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:12:47,620 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2019-09-08 06:12:47,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-08 06:12:47,620 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2019-09-08 06:12:47,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:12:47,622 INFO L225 Difference]: With dead ends: 29 [2019-09-08 06:12:47,622 INFO L226 Difference]: Without dead ends: 25 [2019-09-08 06:12:47,623 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-08 06:12:47,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-09-08 06:12:47,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-09-08 06:12:47,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-09-08 06:12:47,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2019-09-08 06:12:47,631 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 30 [2019-09-08 06:12:47,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:12:47,631 INFO L475 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2019-09-08 06:12:47,632 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-08 06:12:47,632 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2019-09-08 06:12:47,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-09-08 06:12:47,633 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:12:47,634 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:12:47,634 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:12:47,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:12:47,634 INFO L82 PathProgramCache]: Analyzing trace with hash 746268336, now seen corresponding path program 2 times [2019-09-08 06:12:47,635 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:12:47,635 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:12:47,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:47,636 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:12:47,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:47,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:12:48,125 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-08 06:12:48,126 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:12:48,126 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:12:48,142 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:12:48,176 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:12:48,177 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:12:48,179 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 45 conjunts are in the unsatisfiable core [2019-09-08 06:12:48,184 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:12:48,720 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-08 06:12:48,724 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:12:48,724 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 30 [2019-09-08 06:12:48,725 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-09-08 06:12:48,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-09-08 06:12:48,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2019-09-08 06:12:48,727 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 30 states. [2019-09-08 06:12:49,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:12:49,348 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2019-09-08 06:12:49,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-08 06:12:49,348 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 37 [2019-09-08 06:12:49,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:12:49,351 INFO L225 Difference]: With dead ends: 43 [2019-09-08 06:12:49,351 INFO L226 Difference]: Without dead ends: 39 [2019-09-08 06:12:49,352 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=151, Invalid=1109, Unknown=0, NotChecked=0, Total=1260 [2019-09-08 06:12:49,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-08 06:12:49,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2019-09-08 06:12:49,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-09-08 06:12:49,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2019-09-08 06:12:49,365 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 37 [2019-09-08 06:12:49,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:12:49,366 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2019-09-08 06:12:49,366 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-09-08 06:12:49,368 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2019-09-08 06:12:49,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-09-08 06:12:49,370 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:12:49,370 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:12:49,371 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:12:49,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:12:49,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1882602408, now seen corresponding path program 1 times [2019-09-08 06:12:49,373 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:12:49,373 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:12:49,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:49,375 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:12:49,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:49,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:12:49,453 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-09-08 06:12:49,454 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:12:49,454 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 06:12:49,471 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:12:49,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:12:49,492 INFO L256 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-08 06:12:49,495 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:12:49,511 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-09-08 06:12:49,518 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:12:49,518 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2019-09-08 06:12:49,519 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-08 06:12:49,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-08 06:12:49,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-09-08 06:12:49,520 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand 6 states. [2019-09-08 06:12:49,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:12:49,602 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2019-09-08 06:12:49,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-08 06:12:49,604 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2019-09-08 06:12:49,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:12:49,605 INFO L225 Difference]: With dead ends: 57 [2019-09-08 06:12:49,605 INFO L226 Difference]: Without dead ends: 28 [2019-09-08 06:12:49,607 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-09-08 06:12:49,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-09-08 06:12:49,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-09-08 06:12:49,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-09-08 06:12:49,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-09-08 06:12:49,620 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 43 [2019-09-08 06:12:49,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:12:49,622 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-09-08 06:12:49,622 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-08 06:12:49,622 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-09-08 06:12:49,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-09-08 06:12:49,626 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:12:49,626 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:12:49,626 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:12:49,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:12:49,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1837502139, now seen corresponding path program 3 times [2019-09-08 06:12:49,627 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:12:49,627 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:12:49,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:49,631 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:12:49,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:49,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:12:50,311 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 44 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-09-08 06:12:50,312 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:12:50,312 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 06:12:50,334 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:12:50,357 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-09-08 06:12:50,358 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:12:50,360 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 61 conjunts are in the unsatisfiable core [2019-09-08 06:12:50,363 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:12:50,801 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-09-08 06:12:50,805 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:12:50,806 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14] total 31 [2019-09-08 06:12:50,807 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-09-08 06:12:50,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-09-08 06:12:50,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=849, Unknown=0, NotChecked=0, Total=930 [2019-09-08 06:12:50,809 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 31 states. [2019-09-08 06:12:51,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:12:51,418 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2019-09-08 06:12:51,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-08 06:12:51,418 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 44 [2019-09-08 06:12:51,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:12:51,420 INFO L225 Difference]: With dead ends: 39 [2019-09-08 06:12:51,420 INFO L226 Difference]: Without dead ends: 35 [2019-09-08 06:12:51,422 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=171, Invalid=1311, Unknown=0, NotChecked=0, Total=1482 [2019-09-08 06:12:51,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-09-08 06:12:51,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2019-09-08 06:12:51,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-09-08 06:12:51,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2019-09-08 06:12:51,437 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 44 [2019-09-08 06:12:51,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:12:51,437 INFO L475 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2019-09-08 06:12:51,437 INFO L476 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-09-08 06:12:51,437 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2019-09-08 06:12:51,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-09-08 06:12:51,443 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:12:51,444 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:12:51,445 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:12:51,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:12:51,445 INFO L82 PathProgramCache]: Analyzing trace with hash 430867302, now seen corresponding path program 4 times [2019-09-08 06:12:51,446 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:12:51,446 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:12:51,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:51,448 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:12:51,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:51,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:12:51,925 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 2 proven. 70 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-08 06:12:51,925 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:12:51,925 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 06:12:51,946 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:12:51,981 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:12:51,981 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:12:51,985 WARN L254 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 73 conjunts are in the unsatisfiable core [2019-09-08 06:12:51,996 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:12:52,542 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 3 proven. 44 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-09-08 06:12:52,547 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:12:52,547 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 16] total 36 [2019-09-08 06:12:52,548 INFO L454 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-09-08 06:12:52,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-09-08 06:12:52,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1166, Unknown=0, NotChecked=0, Total=1260 [2019-09-08 06:12:52,556 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 36 states. [2019-09-08 06:12:53,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:12:53,342 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2019-09-08 06:12:53,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-08 06:12:53,343 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 51 [2019-09-08 06:12:53,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:12:53,344 INFO L225 Difference]: With dead ends: 42 [2019-09-08 06:12:53,344 INFO L226 Difference]: Without dead ends: 38 [2019-09-08 06:12:53,345 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=218, Invalid=1852, Unknown=0, NotChecked=0, Total=2070 [2019-09-08 06:12:53,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-09-08 06:12:53,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2019-09-08 06:12:53,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-09-08 06:12:53,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2019-09-08 06:12:53,354 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 51 [2019-09-08 06:12:53,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:12:53,354 INFO L475 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2019-09-08 06:12:53,354 INFO L476 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-09-08 06:12:53,354 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2019-09-08 06:12:53,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-09-08 06:12:53,356 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:12:53,356 INFO L399 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:12:53,356 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:12:53,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:12:53,356 INFO L82 PathProgramCache]: Analyzing trace with hash -272057979, now seen corresponding path program 5 times [2019-09-08 06:12:53,357 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:12:53,357 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:12:53,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:53,358 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:12:53,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:53,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:12:53,889 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 2 proven. 102 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-09-08 06:12:53,889 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:12:53,889 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:12:53,908 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 06:12:53,944 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-09-08 06:12:53,944 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:12:53,946 WARN L254 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 84 conjunts are in the unsatisfiable core [2019-09-08 06:12:53,950 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:12:54,840 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 13 proven. 66 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-09-08 06:12:54,845 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:12:54,845 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 22] total 44 [2019-09-08 06:12:54,849 INFO L454 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-09-08 06:12:54,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-09-08 06:12:54,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1756, Unknown=0, NotChecked=0, Total=1892 [2019-09-08 06:12:54,850 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand 44 states. [2019-09-08 06:12:55,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:12:55,841 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2019-09-08 06:12:55,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-08 06:12:55,841 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 58 [2019-09-08 06:12:55,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:12:55,843 INFO L225 Difference]: With dead ends: 45 [2019-09-08 06:12:55,844 INFO L226 Difference]: Without dead ends: 41 [2019-09-08 06:12:55,845 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=295, Invalid=2675, Unknown=0, NotChecked=0, Total=2970 [2019-09-08 06:12:55,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-09-08 06:12:55,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2019-09-08 06:12:55,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-09-08 06:12:55,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2019-09-08 06:12:55,855 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 58 [2019-09-08 06:12:55,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:12:55,855 INFO L475 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2019-09-08 06:12:55,855 INFO L476 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-09-08 06:12:55,856 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2019-09-08 06:12:55,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-09-08 06:12:55,856 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:12:55,857 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:12:55,857 INFO L418 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:12:55,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:12:55,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1146349017, now seen corresponding path program 6 times [2019-09-08 06:12:55,857 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:12:55,857 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:12:55,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:55,858 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:12:55,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:55,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:12:56,193 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-09-08 06:12:56,193 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:12:56,193 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:12:56,204 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 06:12:56,231 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-09-08 06:12:56,231 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:12:56,233 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 56 conjunts are in the unsatisfiable core [2019-09-08 06:12:56,236 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:12:56,738 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-08 06:12:56,742 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:12:56,742 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 35 [2019-09-08 06:12:56,744 INFO L454 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-09-08 06:12:56,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-09-08 06:12:56,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1079, Unknown=0, NotChecked=0, Total=1190 [2019-09-08 06:12:56,745 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 35 states. [2019-09-08 06:12:57,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:12:57,261 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2019-09-08 06:12:57,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-08 06:12:57,261 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 44 [2019-09-08 06:12:57,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:12:57,263 INFO L225 Difference]: With dead ends: 47 [2019-09-08 06:12:57,263 INFO L226 Difference]: Without dead ends: 43 [2019-09-08 06:12:57,265 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=196, Invalid=1526, Unknown=0, NotChecked=0, Total=1722 [2019-09-08 06:12:57,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-09-08 06:12:57,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2019-09-08 06:12:57,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-08 06:12:57,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 54 transitions. [2019-09-08 06:12:57,273 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 54 transitions. Word has length 44 [2019-09-08 06:12:57,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:12:57,274 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 54 transitions. [2019-09-08 06:12:57,274 INFO L476 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-09-08 06:12:57,274 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 54 transitions. [2019-09-08 06:12:57,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-09-08 06:12:57,275 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:12:57,275 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:12:57,275 INFO L418 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:12:57,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:12:57,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1872336740, now seen corresponding path program 7 times [2019-09-08 06:12:57,275 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:12:57,276 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:12:57,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:57,276 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:12:57,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:57,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:12:57,544 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-09-08 06:12:57,544 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:12:57,545 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:12:57,555 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:12:57,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:12:57,575 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 71 conjunts are in the unsatisfiable core [2019-09-08 06:12:57,577 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:12:58,000 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-09-08 06:12:58,004 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:12:58,005 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2019-09-08 06:12:58,005 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-08 06:12:58,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-08 06:12:58,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2019-09-08 06:12:58,007 INFO L87 Difference]: Start difference. First operand 39 states and 54 transitions. Second operand 28 states. [2019-09-08 06:12:58,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:12:58,629 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2019-09-08 06:12:58,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-08 06:12:58,630 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 51 [2019-09-08 06:12:58,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:12:58,632 INFO L225 Difference]: With dead ends: 47 [2019-09-08 06:12:58,632 INFO L226 Difference]: Without dead ends: 43 [2019-09-08 06:12:58,633 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=150, Invalid=1040, Unknown=0, NotChecked=0, Total=1190 [2019-09-08 06:12:58,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-09-08 06:12:58,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2019-09-08 06:12:58,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-08 06:12:58,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 53 transitions. [2019-09-08 06:12:58,641 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 53 transitions. Word has length 51 [2019-09-08 06:12:58,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:12:58,642 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 53 transitions. [2019-09-08 06:12:58,642 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-08 06:12:58,642 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 53 transitions. [2019-09-08 06:12:58,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-09-08 06:12:58,643 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:12:58,643 INFO L399 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:12:58,643 INFO L418 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:12:58,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:12:58,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1605933725, now seen corresponding path program 8 times [2019-09-08 06:12:58,644 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:12:58,644 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:12:58,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:58,645 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:12:58,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:58,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:12:59,249 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-09-08 06:12:59,250 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:12:59,250 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:12:59,263 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:12:59,301 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:12:59,302 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:12:59,312 WARN L254 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 83 conjunts are in the unsatisfiable core [2019-09-08 06:12:59,315 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:12:59,954 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 14 proven. 62 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-09-08 06:12:59,957 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:12:59,958 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 17] total 42 [2019-09-08 06:12:59,958 INFO L454 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-09-08 06:12:59,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-09-08 06:12:59,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1591, Unknown=0, NotChecked=0, Total=1722 [2019-09-08 06:12:59,960 INFO L87 Difference]: Start difference. First operand 39 states and 53 transitions. Second operand 42 states. [2019-09-08 06:13:01,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:01,025 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2019-09-08 06:13:01,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-08 06:13:01,025 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 58 [2019-09-08 06:13:01,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:01,027 INFO L225 Difference]: With dead ends: 47 [2019-09-08 06:13:01,027 INFO L226 Difference]: Without dead ends: 43 [2019-09-08 06:13:01,028 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=264, Invalid=2286, Unknown=0, NotChecked=0, Total=2550 [2019-09-08 06:13:01,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-09-08 06:13:01,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2019-09-08 06:13:01,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-08 06:13:01,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2019-09-08 06:13:01,043 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 58 [2019-09-08 06:13:01,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:01,044 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2019-09-08 06:13:01,045 INFO L476 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-09-08 06:13:01,045 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2019-09-08 06:13:01,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-09-08 06:13:01,046 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:01,046 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:01,046 INFO L418 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:01,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:01,047 INFO L82 PathProgramCache]: Analyzing trace with hash 921134702, now seen corresponding path program 9 times [2019-09-08 06:13:01,047 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:01,047 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:01,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:01,048 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:01,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:01,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:01,906 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 3 proven. 137 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-09-08 06:13:01,906 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:01,906 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:01,917 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 06:13:01,951 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-09-08 06:13:01,952 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:01,954 WARN L254 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 97 conjunts are in the unsatisfiable core [2019-09-08 06:13:01,957 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:02,611 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 9 proven. 79 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (11)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 06:13:02,616 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:02,616 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 18] total 47 [2019-09-08 06:13:02,617 INFO L454 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-09-08 06:13:02,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-09-08 06:13:02,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=2033, Unknown=0, NotChecked=0, Total=2162 [2019-09-08 06:13:02,618 INFO L87 Difference]: Start difference. First operand 39 states and 52 transitions. Second operand 47 states. [2019-09-08 06:13:04,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:04,001 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2019-09-08 06:13:04,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-08 06:13:04,002 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 65 [2019-09-08 06:13:04,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:04,004 INFO L225 Difference]: With dead ends: 47 [2019-09-08 06:13:04,004 INFO L226 Difference]: Without dead ends: 43 [2019-09-08 06:13:04,006 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=354, Invalid=3186, Unknown=0, NotChecked=0, Total=3540 [2019-09-08 06:13:04,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-09-08 06:13:04,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2019-09-08 06:13:04,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-09-08 06:13:04,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2019-09-08 06:13:04,014 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 65 [2019-09-08 06:13:04,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:04,014 INFO L475 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2019-09-08 06:13:04,014 INFO L476 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-09-08 06:13:04,015 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2019-09-08 06:13:04,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-09-08 06:13:04,015 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:04,016 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:04,016 INFO L418 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:04,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:04,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1602258660, now seen corresponding path program 10 times [2019-09-08 06:13:04,016 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:04,017 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:04,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:04,018 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:04,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:04,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:04,628 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 2 proven. 140 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-09-08 06:13:04,629 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:04,629 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:04,649 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 06:13:04,692 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:13:04,693 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:04,695 WARN L254 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 97 conjunts are in the unsatisfiable core [2019-09-08 06:13:04,698 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:05,433 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 5 proven. 85 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-09-08 06:13:05,437 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:05,437 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 20] total 46 [2019-09-08 06:13:05,438 INFO L454 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-09-08 06:13:05,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-09-08 06:13:05,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1950, Unknown=0, NotChecked=0, Total=2070 [2019-09-08 06:13:05,439 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 46 states. [2019-09-08 06:13:06,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:06,857 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2019-09-08 06:13:06,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-08 06:13:06,858 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 65 [2019-09-08 06:13:06,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:06,859 INFO L225 Difference]: With dead ends: 50 [2019-09-08 06:13:06,859 INFO L226 Difference]: Without dead ends: 46 [2019-09-08 06:13:06,862 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=324, Invalid=3216, Unknown=0, NotChecked=0, Total=3540 [2019-09-08 06:13:06,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-09-08 06:13:06,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2019-09-08 06:13:06,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-09-08 06:13:06,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 57 transitions. [2019-09-08 06:13:06,869 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 57 transitions. Word has length 65 [2019-09-08 06:13:06,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:06,869 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 57 transitions. [2019-09-08 06:13:06,869 INFO L476 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-09-08 06:13:06,870 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 57 transitions. [2019-09-08 06:13:06,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-09-08 06:13:06,871 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:06,871 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:06,871 INFO L418 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:06,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:06,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1850137581, now seen corresponding path program 11 times [2019-09-08 06:13:06,872 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:06,872 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:06,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:06,873 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:06,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:06,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:07,872 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 2 proven. 182 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-09-08 06:13:07,872 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:07,872 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:07,885 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 06:13:07,922 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2019-09-08 06:13:07,922 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:07,927 WARN L254 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 108 conjunts are in the unsatisfiable core [2019-09-08 06:13:07,929 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:08,983 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 18 proven. 111 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2019-09-08 06:13:08,988 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:08,989 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 24] total 55 [2019-09-08 06:13:08,989 INFO L454 AbstractCegarLoop]: Interpolant automaton has 55 states [2019-09-08 06:13:08,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2019-09-08 06:13:08,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=2792, Unknown=0, NotChecked=0, Total=2970 [2019-09-08 06:13:08,991 INFO L87 Difference]: Start difference. First operand 42 states and 57 transitions. Second operand 55 states. [2019-09-08 06:13:10,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:10,434 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2019-09-08 06:13:10,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-08 06:13:10,435 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 72 [2019-09-08 06:13:10,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:10,436 INFO L225 Difference]: With dead ends: 50 [2019-09-08 06:13:10,436 INFO L226 Difference]: Without dead ends: 46 [2019-09-08 06:13:10,439 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=424, Invalid=4132, Unknown=0, NotChecked=0, Total=4556 [2019-09-08 06:13:10,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-09-08 06:13:10,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2019-09-08 06:13:10,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-09-08 06:13:10,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 53 transitions. [2019-09-08 06:13:10,448 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 53 transitions. Word has length 72 [2019-09-08 06:13:10,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:10,448 INFO L475 AbstractCegarLoop]: Abstraction has 40 states and 53 transitions. [2019-09-08 06:13:10,448 INFO L476 AbstractCegarLoop]: Interpolant automaton has 55 states. [2019-09-08 06:13:10,448 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 53 transitions. [2019-09-08 06:13:10,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-09-08 06:13:10,449 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:10,449 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:10,450 INFO L418 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:10,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:10,450 INFO L82 PathProgramCache]: Analyzing trace with hash -746065050, now seen corresponding path program 12 times [2019-09-08 06:13:10,450 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:10,450 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:10,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:10,451 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:10,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:10,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:10,900 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 2 proven. 68 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-09-08 06:13:10,901 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:10,901 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:10,912 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 06:13:10,933 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-09-08 06:13:10,933 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:10,937 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 72 conjunts are in the unsatisfiable core [2019-09-08 06:13:10,939 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:11,595 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 47 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-09-08 06:13:11,600 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:11,600 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 40 [2019-09-08 06:13:11,601 INFO L454 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-09-08 06:13:11,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-09-08 06:13:11,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1433, Unknown=0, NotChecked=0, Total=1560 [2019-09-08 06:13:11,602 INFO L87 Difference]: Start difference. First operand 40 states and 53 transitions. Second operand 40 states. [2019-09-08 06:13:12,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:12,621 INFO L93 Difference]: Finished difference Result 50 states and 67 transitions. [2019-09-08 06:13:12,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-08 06:13:12,621 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 51 [2019-09-08 06:13:12,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:12,623 INFO L225 Difference]: With dead ends: 50 [2019-09-08 06:13:12,623 INFO L226 Difference]: Without dead ends: 46 [2019-09-08 06:13:12,624 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=253, Invalid=2099, Unknown=0, NotChecked=0, Total=2352 [2019-09-08 06:13:12,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-09-08 06:13:12,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2019-09-08 06:13:12,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-09-08 06:13:12,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 60 transitions. [2019-09-08 06:13:12,632 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 60 transitions. Word has length 51 [2019-09-08 06:13:12,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:12,632 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 60 transitions. [2019-09-08 06:13:12,632 INFO L476 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-09-08 06:13:12,632 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 60 transitions. [2019-09-08 06:13:12,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-09-08 06:13:12,633 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:12,634 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:12,634 INFO L418 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:12,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:12,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1677321585, now seen corresponding path program 13 times [2019-09-08 06:13:12,634 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:12,635 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:12,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:12,636 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:12,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:12,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:13,603 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 2 proven. 182 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-09-08 06:13:13,604 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:13,604 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:13,616 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:13:13,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:13,648 WARN L254 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 107 conjunts are in the unsatisfiable core [2019-09-08 06:13:13,650 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:14,497 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 22 proven. 108 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-09-08 06:13:14,501 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:14,501 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 19] total 50 [2019-09-08 06:13:14,502 INFO L454 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-09-08 06:13:14,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-09-08 06:13:14,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2293, Unknown=0, NotChecked=0, Total=2450 [2019-09-08 06:13:14,503 INFO L87 Difference]: Start difference. First operand 42 states and 60 transitions. Second operand 50 states. [2019-09-08 06:13:16,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:16,111 INFO L93 Difference]: Finished difference Result 52 states and 68 transitions. [2019-09-08 06:13:16,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-08 06:13:16,112 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 72 [2019-09-08 06:13:16,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:16,113 INFO L225 Difference]: With dead ends: 52 [2019-09-08 06:13:16,113 INFO L226 Difference]: Without dead ends: 46 [2019-09-08 06:13:16,115 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=356, Invalid=3550, Unknown=0, NotChecked=0, Total=3906 [2019-09-08 06:13:16,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-09-08 06:13:16,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2019-09-08 06:13:16,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-09-08 06:13:16,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 57 transitions. [2019-09-08 06:13:16,122 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 57 transitions. Word has length 72 [2019-09-08 06:13:16,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:16,122 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 57 transitions. [2019-09-08 06:13:16,122 INFO L476 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-09-08 06:13:16,122 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 57 transitions. [2019-09-08 06:13:16,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-09-08 06:13:16,123 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:16,123 INFO L399 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:16,124 INFO L418 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:16,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:16,124 INFO L82 PathProgramCache]: Analyzing trace with hash -2039564078, now seen corresponding path program 14 times [2019-09-08 06:13:16,124 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:16,124 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:16,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:16,125 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:13:16,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:16,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:17,128 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 2 proven. 232 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-09-08 06:13:17,129 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:17,129 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:17,140 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:13:17,169 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:13:17,170 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:17,172 WARN L254 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 119 conjunts are in the unsatisfiable core [2019-09-08 06:13:17,174 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:18,445 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 26 proven. 137 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2019-09-08 06:13:18,458 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:18,458 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 21] total 55 [2019-09-08 06:13:18,459 INFO L454 AbstractCegarLoop]: Interpolant automaton has 55 states [2019-09-08 06:13:18,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2019-09-08 06:13:18,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=2798, Unknown=0, NotChecked=0, Total=2970 [2019-09-08 06:13:18,461 INFO L87 Difference]: Start difference. First operand 42 states and 57 transitions. Second operand 55 states. [2019-09-08 06:13:19,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:19,939 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2019-09-08 06:13:19,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-08 06:13:19,940 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 79 [2019-09-08 06:13:19,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:19,941 INFO L225 Difference]: With dead ends: 50 [2019-09-08 06:13:19,942 INFO L226 Difference]: Without dead ends: 46 [2019-09-08 06:13:19,943 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=408, Invalid=4148, Unknown=0, NotChecked=0, Total=4556 [2019-09-08 06:13:19,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-09-08 06:13:19,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2019-09-08 06:13:19,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-09-08 06:13:19,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 53 transitions. [2019-09-08 06:13:19,949 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 53 transitions. Word has length 79 [2019-09-08 06:13:19,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:19,950 INFO L475 AbstractCegarLoop]: Abstraction has 40 states and 53 transitions. [2019-09-08 06:13:19,950 INFO L476 AbstractCegarLoop]: Interpolant automaton has 55 states. [2019-09-08 06:13:19,950 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 53 transitions. [2019-09-08 06:13:19,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-09-08 06:13:19,951 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:19,951 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:19,951 INFO L418 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:19,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:19,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1124697265, now seen corresponding path program 15 times [2019-09-08 06:13:19,952 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:19,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:19,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:19,953 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:19,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:19,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:20,780 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 2 proven. 184 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-09-08 06:13:20,781 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:20,781 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:20,811 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 06:13:20,856 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-09-08 06:13:20,857 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:20,860 WARN L254 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 109 conjunts are in the unsatisfiable core [2019-09-08 06:13:20,862 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:21,773 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 6 proven. 110 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2019-09-08 06:13:21,777 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:21,777 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 22] total 51 [2019-09-08 06:13:21,777 INFO L454 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-09-08 06:13:21,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-09-08 06:13:21,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2417, Unknown=0, NotChecked=0, Total=2550 [2019-09-08 06:13:21,780 INFO L87 Difference]: Start difference. First operand 40 states and 53 transitions. Second operand 51 states. [2019-09-08 06:13:23,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:23,346 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2019-09-08 06:13:23,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-08 06:13:23,347 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 72 [2019-09-08 06:13:23,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:23,349 INFO L225 Difference]: With dead ends: 53 [2019-09-08 06:13:23,349 INFO L226 Difference]: Without dead ends: 49 [2019-09-08 06:13:23,350 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=383, Invalid=4039, Unknown=0, NotChecked=0, Total=4422 [2019-09-08 06:13:23,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-09-08 06:13:23,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2019-09-08 06:13:23,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-09-08 06:13:23,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2019-09-08 06:13:23,356 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 72 [2019-09-08 06:13:23,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:23,356 INFO L475 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2019-09-08 06:13:23,356 INFO L476 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-09-08 06:13:23,356 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2019-09-08 06:13:23,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-09-08 06:13:23,357 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:23,357 INFO L399 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:23,358 INFO L418 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:23,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:23,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1806425208, now seen corresponding path program 16 times [2019-09-08 06:13:23,358 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:23,358 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:23,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:23,359 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:23,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:23,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:24,281 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 2 proven. 232 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-09-08 06:13:24,281 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:24,281 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:24,293 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 06:13:24,321 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:13:24,321 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:24,325 WARN L254 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 121 conjunts are in the unsatisfiable core [2019-09-08 06:13:24,328 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:25,312 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 6 proven. 136 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2019-09-08 06:13:25,315 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:25,316 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 22] total 57 [2019-09-08 06:13:25,316 INFO L454 AbstractCegarLoop]: Interpolant automaton has 57 states [2019-09-08 06:13:25,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2019-09-08 06:13:25,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=3039, Unknown=0, NotChecked=0, Total=3192 [2019-09-08 06:13:25,317 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand 57 states. [2019-09-08 06:13:27,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:27,637 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2019-09-08 06:13:27,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-08 06:13:27,637 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 79 [2019-09-08 06:13:27,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:27,639 INFO L225 Difference]: With dead ends: 55 [2019-09-08 06:13:27,639 INFO L226 Difference]: Without dead ends: 51 [2019-09-08 06:13:27,641 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=488, Invalid=4914, Unknown=0, NotChecked=0, Total=5402 [2019-09-08 06:13:27,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-09-08 06:13:27,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2019-09-08 06:13:27,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-09-08 06:13:27,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2019-09-08 06:13:27,647 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 79 [2019-09-08 06:13:27,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:27,647 INFO L475 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2019-09-08 06:13:27,648 INFO L476 AbstractCegarLoop]: Interpolant automaton has 57 states. [2019-09-08 06:13:27,648 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2019-09-08 06:13:27,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-09-08 06:13:27,649 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:27,649 INFO L399 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:27,649 INFO L418 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:27,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:27,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1615348441, now seen corresponding path program 17 times [2019-09-08 06:13:27,650 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:27,650 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:27,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:27,651 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:27,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:27,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:28,733 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 3 proven. 287 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-09-08 06:13:28,734 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:28,734 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:28,747 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 06:13:28,785 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-09-08 06:13:28,786 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:28,791 WARN L254 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 132 conjunts are in the unsatisfiable core [2019-09-08 06:13:28,795 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:30,171 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 23 proven. 168 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2019-09-08 06:13:30,175 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:30,175 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 26] total 63 [2019-09-08 06:13:30,176 INFO L454 AbstractCegarLoop]: Interpolant automaton has 63 states [2019-09-08 06:13:30,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2019-09-08 06:13:30,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=3700, Unknown=0, NotChecked=0, Total=3906 [2019-09-08 06:13:30,179 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand 63 states. [2019-09-08 06:13:32,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:32,018 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2019-09-08 06:13:32,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-08 06:13:32,019 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 86 [2019-09-08 06:13:32,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:32,020 INFO L225 Difference]: With dead ends: 53 [2019-09-08 06:13:32,021 INFO L226 Difference]: Without dead ends: 49 [2019-09-08 06:13:32,022 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=522, Invalid=5484, Unknown=0, NotChecked=0, Total=6006 [2019-09-08 06:13:32,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-09-08 06:13:32,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2019-09-08 06:13:32,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-09-08 06:13:32,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2019-09-08 06:13:32,028 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 86 [2019-09-08 06:13:32,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:32,028 INFO L475 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2019-09-08 06:13:32,029 INFO L476 AbstractCegarLoop]: Interpolant automaton has 63 states. [2019-09-08 06:13:32,029 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2019-09-08 06:13:32,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-09-08 06:13:32,030 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:32,030 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:32,030 INFO L418 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:32,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:32,031 INFO L82 PathProgramCache]: Analyzing trace with hash -335786642, now seen corresponding path program 18 times [2019-09-08 06:13:32,031 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:32,031 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:32,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:32,032 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:32,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:32,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:33,305 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 2 proven. 347 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-09-08 06:13:33,305 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:33,306 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:33,318 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 06:13:33,359 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2019-09-08 06:13:33,360 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:33,363 WARN L254 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 145 conjunts are in the unsatisfiable core [2019-09-08 06:13:33,366 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:36,574 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 6 proven. 197 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2019-09-08 06:13:36,579 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:36,579 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 22] total 62 [2019-09-08 06:13:36,580 INFO L454 AbstractCegarLoop]: Interpolant automaton has 62 states [2019-09-08 06:13:36,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2019-09-08 06:13:36,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=3614, Unknown=0, NotChecked=0, Total=3782 [2019-09-08 06:13:36,581 INFO L87 Difference]: Start difference. First operand 43 states and 58 transitions. Second operand 62 states. [2019-09-08 06:13:38,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:38,994 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2019-09-08 06:13:38,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-08 06:13:38,995 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 93 [2019-09-08 06:13:38,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:38,996 INFO L225 Difference]: With dead ends: 55 [2019-09-08 06:13:38,996 INFO L226 Difference]: Without dead ends: 49 [2019-09-08 06:13:38,997 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 908 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=534, Invalid=5946, Unknown=0, NotChecked=0, Total=6480 [2019-09-08 06:13:38,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-09-08 06:13:39,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2019-09-08 06:13:39,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-09-08 06:13:39,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2019-09-08 06:13:39,002 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 93 [2019-09-08 06:13:39,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:39,003 INFO L475 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2019-09-08 06:13:39,003 INFO L476 AbstractCegarLoop]: Interpolant automaton has 62 states. [2019-09-08 06:13:39,003 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2019-09-08 06:13:39,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-09-08 06:13:39,004 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:39,004 INFO L399 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:39,005 INFO L418 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:39,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:39,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1266374702, now seen corresponding path program 19 times [2019-09-08 06:13:39,005 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:39,005 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:39,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:39,006 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:39,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:39,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:39,848 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 2 proven. 234 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-09-08 06:13:39,848 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:39,848 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:39,859 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:13:39,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:39,891 WARN L254 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 116 conjunts are in the unsatisfiable core [2019-09-08 06:13:39,893 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:41,160 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 50 proven. 131 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-09-08 06:13:41,164 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:41,164 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 28] total 60 [2019-09-08 06:13:41,164 INFO L454 AbstractCegarLoop]: Interpolant automaton has 60 states [2019-09-08 06:13:41,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2019-09-08 06:13:41,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=3355, Unknown=0, NotChecked=0, Total=3540 [2019-09-08 06:13:41,166 INFO L87 Difference]: Start difference. First operand 43 states and 58 transitions. Second operand 60 states. [2019-09-08 06:13:43,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:43,460 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2019-09-08 06:13:43,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-08 06:13:43,461 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 79 [2019-09-08 06:13:43,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:43,462 INFO L225 Difference]: With dead ends: 56 [2019-09-08 06:13:43,462 INFO L226 Difference]: Without dead ends: 52 [2019-09-08 06:13:43,464 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=486, Invalid=5366, Unknown=0, NotChecked=0, Total=5852 [2019-09-08 06:13:43,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-09-08 06:13:43,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2019-09-08 06:13:43,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-09-08 06:13:43,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 67 transitions. [2019-09-08 06:13:43,469 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 67 transitions. Word has length 79 [2019-09-08 06:13:43,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:43,469 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 67 transitions. [2019-09-08 06:13:43,469 INFO L476 AbstractCegarLoop]: Interpolant automaton has 60 states. [2019-09-08 06:13:43,469 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 67 transitions. [2019-09-08 06:13:43,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-09-08 06:13:43,470 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:43,470 INFO L399 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:43,471 INFO L418 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:43,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:43,471 INFO L82 PathProgramCache]: Analyzing trace with hash -180332919, now seen corresponding path program 20 times [2019-09-08 06:13:43,471 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:43,471 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:43,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:43,472 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:13:43,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:43,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:44,597 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 2 proven. 288 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-09-08 06:13:44,597 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:44,597 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:44,613 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:13:44,648 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:13:44,648 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:44,652 WARN L254 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 131 conjunts are in the unsatisfiable core [2019-09-08 06:13:44,654 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:45,987 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 30 proven. 172 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2019-09-08 06:13:45,995 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:45,996 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 25] total 62 [2019-09-08 06:13:45,996 INFO L454 AbstractCegarLoop]: Interpolant automaton has 62 states [2019-09-08 06:13:45,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2019-09-08 06:13:45,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=3591, Unknown=0, NotChecked=0, Total=3782 [2019-09-08 06:13:45,997 INFO L87 Difference]: Start difference. First operand 48 states and 67 transitions. Second operand 62 states. [2019-09-08 06:13:48,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:48,109 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2019-09-08 06:13:48,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-08 06:13:48,112 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 86 [2019-09-08 06:13:48,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:48,113 INFO L225 Difference]: With dead ends: 58 [2019-09-08 06:13:48,114 INFO L226 Difference]: Without dead ends: 54 [2019-09-08 06:13:48,115 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=520, Invalid=5642, Unknown=0, NotChecked=0, Total=6162 [2019-09-08 06:13:48,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-09-08 06:13:48,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2019-09-08 06:13:48,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-09-08 06:13:48,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 67 transitions. [2019-09-08 06:13:48,120 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 67 transitions. Word has length 86 [2019-09-08 06:13:48,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:48,121 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 67 transitions. [2019-09-08 06:13:48,121 INFO L476 AbstractCegarLoop]: Interpolant automaton has 62 states. [2019-09-08 06:13:48,121 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 67 transitions. [2019-09-08 06:13:48,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-09-08 06:13:48,122 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:48,122 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:48,122 INFO L418 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:48,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:48,123 INFO L82 PathProgramCache]: Analyzing trace with hash -313052920, now seen corresponding path program 21 times [2019-09-08 06:13:48,123 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:48,123 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:48,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:48,124 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:48,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:48,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:49,413 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 2 proven. 350 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2019-09-08 06:13:49,414 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:49,414 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:49,428 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 06:13:49,475 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2019-09-08 06:13:49,476 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:49,481 WARN L254 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 145 conjunts are in the unsatisfiable core [2019-09-08 06:13:49,486 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:51,039 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 15 proven. 192 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2019-09-08 06:13:51,046 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:51,046 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 24] total 65 [2019-09-08 06:13:51,047 INFO L454 AbstractCegarLoop]: Interpolant automaton has 65 states [2019-09-08 06:13:51,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2019-09-08 06:13:51,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=3985, Unknown=0, NotChecked=0, Total=4160 [2019-09-08 06:13:51,048 INFO L87 Difference]: Start difference. First operand 48 states and 67 transitions. Second operand 65 states. [2019-09-08 06:13:53,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:53,708 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2019-09-08 06:13:53,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-08 06:13:53,709 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 93 [2019-09-08 06:13:53,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:53,711 INFO L225 Difference]: With dead ends: 58 [2019-09-08 06:13:53,711 INFO L226 Difference]: Without dead ends: 54 [2019-09-08 06:13:53,713 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=590, Invalid=6382, Unknown=0, NotChecked=0, Total=6972 [2019-09-08 06:13:53,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-09-08 06:13:53,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2019-09-08 06:13:53,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-09-08 06:13:53,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 67 transitions. [2019-09-08 06:13:53,720 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 67 transitions. Word has length 93 [2019-09-08 06:13:53,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:53,721 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 67 transitions. [2019-09-08 06:13:53,721 INFO L476 AbstractCegarLoop]: Interpolant automaton has 65 states. [2019-09-08 06:13:53,721 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 67 transitions. [2019-09-08 06:13:53,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-09-08 06:13:53,722 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:53,722 INFO L399 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:53,723 INFO L418 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:53,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:53,723 INFO L82 PathProgramCache]: Analyzing trace with hash -789379885, now seen corresponding path program 22 times [2019-09-08 06:13:53,723 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:53,724 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:53,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:53,725 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:53,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:53,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:55,229 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 2 proven. 418 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-09-08 06:13:55,229 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:55,229 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:55,243 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 06:13:55,279 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:13:55,280 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:55,284 WARN L254 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 157 conjunts are in the unsatisfiable core [2019-09-08 06:13:55,287 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:56,690 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 7 proven. 234 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2019-09-08 06:13:56,696 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:56,696 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 24] total 68 [2019-09-08 06:13:56,696 INFO L454 AbstractCegarLoop]: Interpolant automaton has 68 states [2019-09-08 06:13:56,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2019-09-08 06:13:56,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=4372, Unknown=0, NotChecked=0, Total=4556 [2019-09-08 06:13:56,697 INFO L87 Difference]: Start difference. First operand 48 states and 67 transitions. Second operand 68 states. [2019-09-08 06:13:59,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:59,574 INFO L93 Difference]: Finished difference Result 56 states and 73 transitions. [2019-09-08 06:13:59,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-08 06:13:59,575 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 100 [2019-09-08 06:13:59,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:59,576 INFO L225 Difference]: With dead ends: 56 [2019-09-08 06:13:59,576 INFO L226 Difference]: Without dead ends: 52 [2019-09-08 06:13:59,577 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 998 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=618, Invalid=6864, Unknown=0, NotChecked=0, Total=7482 [2019-09-08 06:13:59,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-09-08 06:13:59,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2019-09-08 06:13:59,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-09-08 06:13:59,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2019-09-08 06:13:59,582 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 100 [2019-09-08 06:13:59,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:59,583 INFO L475 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2019-09-08 06:13:59,583 INFO L476 AbstractCegarLoop]: Interpolant automaton has 68 states. [2019-09-08 06:13:59,583 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2019-09-08 06:13:59,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-09-08 06:13:59,584 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:59,584 INFO L399 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:59,584 INFO L418 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:59,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:59,585 INFO L82 PathProgramCache]: Analyzing trace with hash -793317021, now seen corresponding path program 23 times [2019-09-08 06:13:59,585 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:59,585 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:59,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:59,586 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:59,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:59,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:14:01,008 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 2 proven. 418 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-09-08 06:14:01,008 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:14:01,009 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:14:01,021 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 06:14:01,066 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2019-09-08 06:14:01,067 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:14:01,071 WARN L254 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 156 conjunts are in the unsatisfiable core [2019-09-08 06:14:01,074 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:14:02,554 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 27 proven. 235 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2019-09-08 06:14:02,561 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:14:02,561 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 26] total 69 [2019-09-08 06:14:02,562 INFO L454 AbstractCegarLoop]: Interpolant automaton has 69 states [2019-09-08 06:14:02,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2019-09-08 06:14:02,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=4466, Unknown=0, NotChecked=0, Total=4692 [2019-09-08 06:14:02,563 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand 69 states. [2019-09-08 06:14:05,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:14:05,246 INFO L93 Difference]: Finished difference Result 58 states and 81 transitions. [2019-09-08 06:14:05,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-08 06:14:05,246 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 100 [2019-09-08 06:14:05,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:14:05,248 INFO L225 Difference]: With dead ends: 58 [2019-09-08 06:14:05,248 INFO L226 Difference]: Without dead ends: 52 [2019-09-08 06:14:05,250 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=584, Invalid=6726, Unknown=0, NotChecked=0, Total=7310 [2019-09-08 06:14:05,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-09-08 06:14:05,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2019-09-08 06:14:05,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-09-08 06:14:05,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 67 transitions. [2019-09-08 06:14:05,256 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 67 transitions. Word has length 100 [2019-09-08 06:14:05,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:14:05,257 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 67 transitions. [2019-09-08 06:14:05,257 INFO L476 AbstractCegarLoop]: Interpolant automaton has 69 states. [2019-09-08 06:14:05,257 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 67 transitions. [2019-09-08 06:14:05,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-09-08 06:14:05,258 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:14:05,258 INFO L399 BasicCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:14:05,258 INFO L418 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:14:05,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:14:05,259 INFO L82 PathProgramCache]: Analyzing trace with hash -787811522, now seen corresponding path program 24 times [2019-09-08 06:14:05,259 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:14:05,259 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:14:05,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:05,260 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:14:05,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:05,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:14:07,142 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 2 proven. 492 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2019-09-08 06:14:07,142 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:14:07,142 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:14:07,163 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 06:14:07,214 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2019-09-08 06:14:07,215 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:14:07,218 WARN L254 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 169 conjunts are in the unsatisfiable core [2019-09-08 06:14:07,221 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:14:08,797 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 7 proven. 272 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2019-09-08 06:14:08,801 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:14:08,802 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 24] total 71 [2019-09-08 06:14:08,802 INFO L454 AbstractCegarLoop]: Interpolant automaton has 71 states [2019-09-08 06:14:08,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2019-09-08 06:14:08,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=4777, Unknown=0, NotChecked=0, Total=4970 [2019-09-08 06:14:08,803 INFO L87 Difference]: Start difference. First operand 48 states and 67 transitions. Second operand 71 states. [2019-09-08 06:14:11,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:14:11,361 INFO L93 Difference]: Finished difference Result 56 states and 73 transitions. [2019-09-08 06:14:11,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-08 06:14:11,361 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 107 [2019-09-08 06:14:11,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:14:11,363 INFO L225 Difference]: With dead ends: 56 [2019-09-08 06:14:11,363 INFO L226 Difference]: Without dead ends: 52 [2019-09-08 06:14:11,365 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1002 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=646, Invalid=7364, Unknown=0, NotChecked=0, Total=8010 [2019-09-08 06:14:11,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-09-08 06:14:11,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2019-09-08 06:14:11,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-09-08 06:14:11,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2019-09-08 06:14:11,370 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 107 [2019-09-08 06:14:11,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:14:11,370 INFO L475 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2019-09-08 06:14:11,370 INFO L476 AbstractCegarLoop]: Interpolant automaton has 71 states. [2019-09-08 06:14:11,370 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2019-09-08 06:14:11,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-09-08 06:14:11,371 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:14:11,371 INFO L399 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:14:11,372 INFO L418 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:14:11,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:14:11,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1080603673, now seen corresponding path program 25 times [2019-09-08 06:14:11,372 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:14:11,372 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:14:11,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:11,373 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:14:11,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:11,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:14:12,327 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 2 proven. 290 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-09-08 06:14:12,328 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:14:12,328 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:14:12,339 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:14:12,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:14:12,375 WARN L254 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 128 conjunts are in the unsatisfiable core [2019-09-08 06:14:12,377 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:14:13,874 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 57 proven. 161 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2019-09-08 06:14:13,880 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:14:13,880 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 30] total 65 [2019-09-08 06:14:13,881 INFO L454 AbstractCegarLoop]: Interpolant automaton has 65 states [2019-09-08 06:14:13,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2019-09-08 06:14:13,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=3960, Unknown=0, NotChecked=0, Total=4160 [2019-09-08 06:14:13,882 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand 65 states. [2019-09-08 06:14:16,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:14:16,122 INFO L93 Difference]: Finished difference Result 59 states and 79 transitions. [2019-09-08 06:14:16,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-08 06:14:16,123 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 86 [2019-09-08 06:14:16,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:14:16,124 INFO L225 Difference]: With dead ends: 59 [2019-09-08 06:14:16,124 INFO L226 Difference]: Without dead ends: 55 [2019-09-08 06:14:16,125 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=556, Invalid=6416, Unknown=0, NotChecked=0, Total=6972 [2019-09-08 06:14:16,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-09-08 06:14:16,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2019-09-08 06:14:16,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-09-08 06:14:16,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 72 transitions. [2019-09-08 06:14:16,130 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 72 transitions. Word has length 86 [2019-09-08 06:14:16,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:14:16,130 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 72 transitions. [2019-09-08 06:14:16,130 INFO L476 AbstractCegarLoop]: Interpolant automaton has 65 states. [2019-09-08 06:14:16,131 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 72 transitions. [2019-09-08 06:14:16,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-09-08 06:14:16,131 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:14:16,132 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:14:16,132 INFO L418 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:14:16,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:14:16,132 INFO L82 PathProgramCache]: Analyzing trace with hash 365189506, now seen corresponding path program 26 times [2019-09-08 06:14:16,132 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:14:16,133 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:14:16,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:16,133 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:14:16,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:16,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:14:17,432 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 2 proven. 350 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2019-09-08 06:14:17,432 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:14:17,432 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:14:17,448 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:14:17,484 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:14:17,484 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:14:17,487 WARN L254 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 143 conjunts are in the unsatisfiable core [2019-09-08 06:14:17,489 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:14:19,011 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 34 proven. 207 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2019-09-08 06:14:19,019 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:14:19,020 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 27] total 67 [2019-09-08 06:14:19,021 INFO L454 AbstractCegarLoop]: Interpolant automaton has 67 states [2019-09-08 06:14:19,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2019-09-08 06:14:19,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=4216, Unknown=0, NotChecked=0, Total=4422 [2019-09-08 06:14:19,023 INFO L87 Difference]: Start difference. First operand 51 states and 72 transitions. Second operand 67 states. [2019-09-08 06:14:21,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:14:21,493 INFO L93 Difference]: Finished difference Result 61 states and 82 transitions. [2019-09-08 06:14:21,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-08 06:14:21,494 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 93 [2019-09-08 06:14:21,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:14:21,495 INFO L225 Difference]: With dead ends: 61 [2019-09-08 06:14:21,495 INFO L226 Difference]: Without dead ends: 57 [2019-09-08 06:14:21,496 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1094 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=594, Invalid=6716, Unknown=0, NotChecked=0, Total=7310 [2019-09-08 06:14:21,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-09-08 06:14:21,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2019-09-08 06:14:21,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-09-08 06:14:21,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 72 transitions. [2019-09-08 06:14:21,502 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 72 transitions. Word has length 93 [2019-09-08 06:14:21,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:14:21,502 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 72 transitions. [2019-09-08 06:14:21,502 INFO L476 AbstractCegarLoop]: Interpolant automaton has 67 states. [2019-09-08 06:14:21,502 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 72 transitions. [2019-09-08 06:14:21,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-09-08 06:14:21,503 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:14:21,503 INFO L399 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:14:21,504 INFO L418 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:14:21,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:14:21,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1104773667, now seen corresponding path program 27 times [2019-09-08 06:14:21,504 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:14:21,504 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:14:21,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:21,505 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:14:21,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:21,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:14:23,287 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 2 proven. 418 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-09-08 06:14:23,288 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:14:23,288 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:14:23,299 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 06:14:23,353 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-09-08 06:14:23,353 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:14:23,356 WARN L254 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 157 conjunts are in the unsatisfiable core [2019-09-08 06:14:23,364 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:14:24,883 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 8 proven. 236 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-09-08 06:14:24,888 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:14:24,888 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 26] total 70 [2019-09-08 06:14:24,889 INFO L454 AbstractCegarLoop]: Interpolant automaton has 70 states [2019-09-08 06:14:24,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2019-09-08 06:14:24,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=4642, Unknown=0, NotChecked=0, Total=4830 [2019-09-08 06:14:24,890 INFO L87 Difference]: Start difference. First operand 51 states and 72 transitions. Second operand 70 states. [2019-09-08 06:14:27,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:14:27,898 INFO L93 Difference]: Finished difference Result 61 states and 82 transitions. [2019-09-08 06:14:27,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-08 06:14:27,899 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 100 [2019-09-08 06:14:27,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:14:27,900 INFO L225 Difference]: With dead ends: 61 [2019-09-08 06:14:27,900 INFO L226 Difference]: Without dead ends: 57 [2019-09-08 06:14:27,902 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1178 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=670, Invalid=7520, Unknown=0, NotChecked=0, Total=8190 [2019-09-08 06:14:27,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-09-08 06:14:27,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2019-09-08 06:14:27,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-09-08 06:14:27,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 72 transitions. [2019-09-08 06:14:27,908 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 72 transitions. Word has length 100 [2019-09-08 06:14:27,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:14:27,908 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 72 transitions. [2019-09-08 06:14:27,908 INFO L476 AbstractCegarLoop]: Interpolant automaton has 70 states. [2019-09-08 06:14:27,908 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 72 transitions. [2019-09-08 06:14:27,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-09-08 06:14:27,909 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:14:27,910 INFO L399 BasicCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:14:27,910 INFO L418 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:14:27,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:14:27,910 INFO L82 PathProgramCache]: Analyzing trace with hash 560522232, now seen corresponding path program 28 times [2019-09-08 06:14:27,910 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:14:27,911 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:14:27,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:27,911 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:14:27,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:27,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:14:29,445 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 3 proven. 488 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2019-09-08 06:14:29,446 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:14:29,446 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:14:29,460 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 06:14:29,508 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:14:29,509 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:14:29,514 WARN L254 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 169 conjunts are in the unsatisfiable core [2019-09-08 06:14:29,519 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:14:31,105 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 8 proven. 274 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2019-09-08 06:14:31,110 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:14:31,110 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 26] total 72 [2019-09-08 06:14:31,110 INFO L454 AbstractCegarLoop]: Interpolant automaton has 72 states [2019-09-08 06:14:31,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2019-09-08 06:14:31,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=4916, Unknown=0, NotChecked=0, Total=5112 [2019-09-08 06:14:31,112 INFO L87 Difference]: Start difference. First operand 51 states and 72 transitions. Second operand 72 states. [2019-09-08 06:14:34,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:14:34,145 INFO L93 Difference]: Finished difference Result 61 states and 82 transitions. [2019-09-08 06:14:34,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-08 06:14:34,146 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 107 [2019-09-08 06:14:34,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:14:34,147 INFO L225 Difference]: With dead ends: 61 [2019-09-08 06:14:34,148 INFO L226 Difference]: Without dead ends: 57 [2019-09-08 06:14:34,149 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1227 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=680, Invalid=7876, Unknown=0, NotChecked=0, Total=8556 [2019-09-08 06:14:34,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-09-08 06:14:34,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2019-09-08 06:14:34,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-09-08 06:14:34,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 72 transitions. [2019-09-08 06:14:34,155 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 72 transitions. Word has length 107 [2019-09-08 06:14:34,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:14:34,155 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 72 transitions. [2019-09-08 06:14:34,155 INFO L476 AbstractCegarLoop]: Interpolant automaton has 72 states. [2019-09-08 06:14:34,156 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 72 transitions. [2019-09-08 06:14:34,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-09-08 06:14:34,157 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:14:34,157 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:14:34,157 INFO L418 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:14:34,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:14:34,157 INFO L82 PathProgramCache]: Analyzing trace with hash -330893523, now seen corresponding path program 29 times [2019-09-08 06:14:34,158 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:14:34,158 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:14:34,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:34,159 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:14:34,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:34,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:14:36,076 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 2 proven. 572 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2019-09-08 06:14:36,076 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:14:36,076 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:14:36,088 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 06:14:36,171 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-09-08 06:14:36,172 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:14:36,177 WARN L254 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 180 conjunts are in the unsatisfiable core [2019-09-08 06:14:36,181 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:14:40,127 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 33 proven. 318 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2019-09-08 06:14:40,131 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:14:40,132 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 30] total 79 [2019-09-08 06:14:40,132 INFO L454 AbstractCegarLoop]: Interpolant automaton has 79 states [2019-09-08 06:14:40,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2019-09-08 06:14:40,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=5906, Unknown=0, NotChecked=0, Total=6162 [2019-09-08 06:14:40,133 INFO L87 Difference]: Start difference. First operand 51 states and 72 transitions. Second operand 79 states. [2019-09-08 06:14:43,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:14:43,270 INFO L93 Difference]: Finished difference Result 59 states and 78 transitions. [2019-09-08 06:14:43,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-08 06:14:43,271 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 114 [2019-09-08 06:14:43,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:14:43,272 INFO L225 Difference]: With dead ends: 59 [2019-09-08 06:14:43,273 INFO L226 Difference]: Without dead ends: 55 [2019-09-08 06:14:43,274 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1272 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=736, Invalid=8770, Unknown=0, NotChecked=0, Total=9506 [2019-09-08 06:14:43,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-09-08 06:14:43,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2019-09-08 06:14:43,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-09-08 06:14:43,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 68 transitions. [2019-09-08 06:14:43,280 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 68 transitions. Word has length 114 [2019-09-08 06:14:43,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:14:43,281 INFO L475 AbstractCegarLoop]: Abstraction has 49 states and 68 transitions. [2019-09-08 06:14:43,281 INFO L476 AbstractCegarLoop]: Interpolant automaton has 79 states. [2019-09-08 06:14:43,281 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 68 transitions. [2019-09-08 06:14:43,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-09-08 06:14:43,282 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:14:43,282 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:14:43,283 INFO L418 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:14:43,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:14:43,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1343946330, now seen corresponding path program 30 times [2019-09-08 06:14:43,283 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:14:43,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:14:43,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:43,285 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:14:43,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:43,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:14:44,824 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 349 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-09-08 06:14:44,824 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:14:44,825 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:14:44,839 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 06:14:44,884 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-09-08 06:14:44,885 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:14:44,889 WARN L254 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 144 conjunts are in the unsatisfiable core [2019-09-08 06:14:44,891 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:14:46,324 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 22 proven. 203 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2019-09-08 06:14:46,329 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:14:46,329 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 26] total 65 [2019-09-08 06:14:46,330 INFO L454 AbstractCegarLoop]: Interpolant automaton has 65 states [2019-09-08 06:14:46,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2019-09-08 06:14:46,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=3950, Unknown=0, NotChecked=0, Total=4160 [2019-09-08 06:14:46,331 INFO L87 Difference]: Start difference. First operand 49 states and 68 transitions. Second operand 65 states. [2019-09-08 06:14:48,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:14:48,444 INFO L93 Difference]: Finished difference Result 61 states and 87 transitions. [2019-09-08 06:14:48,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-08 06:14:48,445 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 93 [2019-09-08 06:14:48,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:14:48,446 INFO L225 Difference]: With dead ends: 61 [2019-09-08 06:14:48,446 INFO L226 Difference]: Without dead ends: 55 [2019-09-08 06:14:48,447 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=540, Invalid=6102, Unknown=0, NotChecked=0, Total=6642 [2019-09-08 06:14:48,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-09-08 06:14:48,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2019-09-08 06:14:48,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-09-08 06:14:48,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 73 transitions. [2019-09-08 06:14:48,453 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 73 transitions. Word has length 93 [2019-09-08 06:14:48,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:14:48,453 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 73 transitions. [2019-09-08 06:14:48,453 INFO L476 AbstractCegarLoop]: Interpolant automaton has 65 states. [2019-09-08 06:14:48,453 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 73 transitions. [2019-09-08 06:14:48,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-09-08 06:14:48,454 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:14:48,455 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:14:48,455 INFO L418 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:14:48,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:14:48,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1907807715, now seen corresponding path program 31 times [2019-09-08 06:14:48,455 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:14:48,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:14:48,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:48,456 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:14:48,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:48,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:14:50,436 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 2 proven. 572 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2019-09-08 06:14:50,437 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:14:50,437 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:14:50,450 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:14:50,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:14:50,492 WARN L254 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 179 conjunts are in the unsatisfiable core [2019-09-08 06:14:50,494 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:14:52,100 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 46 proven. 318 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2019-09-08 06:14:52,106 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:14:52,106 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 25] total 74 [2019-09-08 06:14:52,106 INFO L454 AbstractCegarLoop]: Interpolant automaton has 74 states [2019-09-08 06:14:52,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2019-09-08 06:14:52,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=5167, Unknown=0, NotChecked=0, Total=5402 [2019-09-08 06:14:52,107 INFO L87 Difference]: Start difference. First operand 51 states and 73 transitions. Second operand 74 states. [2019-09-08 06:14:54,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:14:54,588 INFO L93 Difference]: Finished difference Result 59 states and 79 transitions. [2019-09-08 06:14:54,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-08 06:14:54,589 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 114 [2019-09-08 06:14:54,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:14:54,590 INFO L225 Difference]: With dead ends: 59 [2019-09-08 06:14:54,590 INFO L226 Difference]: Without dead ends: 55 [2019-09-08 06:14:54,591 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=632, Invalid=7558, Unknown=0, NotChecked=0, Total=8190 [2019-09-08 06:14:54,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-09-08 06:14:54,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2019-09-08 06:14:54,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-09-08 06:14:54,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 72 transitions. [2019-09-08 06:14:54,597 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 72 transitions. Word has length 114 [2019-09-08 06:14:54,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:14:54,597 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 72 transitions. [2019-09-08 06:14:54,597 INFO L476 AbstractCegarLoop]: Interpolant automaton has 74 states. [2019-09-08 06:14:54,597 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 72 transitions. [2019-09-08 06:14:54,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-09-08 06:14:54,598 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:14:54,598 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:14:54,599 INFO L418 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:14:54,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:14:54,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1776686958, now seen corresponding path program 32 times [2019-09-08 06:14:54,599 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:14:54,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:14:54,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:54,600 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:14:54,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:54,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:14:56,544 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 2 proven. 655 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2019-09-08 06:14:56,545 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:14:56,545 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:14:56,558 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:14:56,603 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:14:56,603 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:14:56,607 WARN L254 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 191 conjunts are in the unsatisfiable core [2019-09-08 06:14:56,611 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:14:58,486 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 50 proven. 365 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2019-09-08 06:14:58,491 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:14:58,491 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 27] total 78 [2019-09-08 06:14:58,492 INFO L454 AbstractCegarLoop]: Interpolant automaton has 78 states [2019-09-08 06:14:58,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2019-09-08 06:14:58,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=5761, Unknown=0, NotChecked=0, Total=6006 [2019-09-08 06:14:58,493 INFO L87 Difference]: Start difference. First operand 51 states and 72 transitions. Second operand 78 states. [2019-09-08 06:15:01,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:15:01,940 INFO L93 Difference]: Finished difference Result 59 states and 78 transitions. [2019-09-08 06:15:01,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-08 06:15:01,941 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 121 [2019-09-08 06:15:01,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:15:01,942 INFO L225 Difference]: With dead ends: 59 [2019-09-08 06:15:01,942 INFO L226 Difference]: Without dead ends: 55 [2019-09-08 06:15:01,943 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=692, Invalid=8620, Unknown=0, NotChecked=0, Total=9312 [2019-09-08 06:15:01,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-09-08 06:15:01,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2019-09-08 06:15:01,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-09-08 06:15:01,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 68 transitions. [2019-09-08 06:15:01,949 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 68 transitions. Word has length 121 [2019-09-08 06:15:01,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:15:01,949 INFO L475 AbstractCegarLoop]: Abstraction has 49 states and 68 transitions. [2019-09-08 06:15:01,949 INFO L476 AbstractCegarLoop]: Interpolant automaton has 78 states. [2019-09-08 06:15:01,949 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 68 transitions. [2019-09-08 06:15:01,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-09-08 06:15:01,950 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:15:01,950 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:15:01,950 INFO L418 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:15:01,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:15:01,951 INFO L82 PathProgramCache]: Analyzing trace with hash 183807880, now seen corresponding path program 33 times [2019-09-08 06:15:01,951 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:15:01,951 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:15:01,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:01,952 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:15:01,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:01,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:15:03,067 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 2 proven. 352 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-09-08 06:15:03,068 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:15:03,068 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:15:03,080 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 06:15:03,126 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-09-08 06:15:03,127 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:15:03,131 WARN L254 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 145 conjunts are in the unsatisfiable core [2019-09-08 06:15:03,134 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:15:05,021 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 9 proven. 203 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2019-09-08 06:15:05,025 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:15:05,026 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 28] total 66 [2019-09-08 06:15:05,026 INFO L454 AbstractCegarLoop]: Interpolant automaton has 66 states [2019-09-08 06:15:05,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2019-09-08 06:15:05,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=4118, Unknown=0, NotChecked=0, Total=4290 [2019-09-08 06:15:05,027 INFO L87 Difference]: Start difference. First operand 49 states and 68 transitions. Second operand 66 states. [2019-09-08 06:15:08,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:15:08,054 INFO L93 Difference]: Finished difference Result 62 states and 84 transitions. [2019-09-08 06:15:08,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-09-08 06:15:08,060 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 93 [2019-09-08 06:15:08,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:15:08,060 INFO L225 Difference]: With dead ends: 62 [2019-09-08 06:15:08,061 INFO L226 Difference]: Without dead ends: 58 [2019-09-08 06:15:08,061 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=584, Invalid=7072, Unknown=0, NotChecked=0, Total=7656 [2019-09-08 06:15:08,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-09-08 06:15:08,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2019-09-08 06:15:08,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-09-08 06:15:08,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 77 transitions. [2019-09-08 06:15:08,069 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 77 transitions. Word has length 93 [2019-09-08 06:15:08,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:15:08,069 INFO L475 AbstractCegarLoop]: Abstraction has 54 states and 77 transitions. [2019-09-08 06:15:08,069 INFO L476 AbstractCegarLoop]: Interpolant automaton has 66 states. [2019-09-08 06:15:08,070 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 77 transitions. [2019-09-08 06:15:08,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-09-08 06:15:08,070 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:15:08,071 INFO L399 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:15:08,071 INFO L418 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:15:08,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:15:08,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1182847487, now seen corresponding path program 34 times [2019-09-08 06:15:08,071 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:15:08,071 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:15:08,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:08,072 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:15:08,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:08,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:15:09,760 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 2 proven. 418 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-09-08 06:15:09,761 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:15:09,761 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:15:09,774 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 06:15:09,822 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:15:09,823 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:15:09,827 WARN L254 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 157 conjunts are in the unsatisfiable core [2019-09-08 06:15:09,830 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:15:11,542 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 9 proven. 238 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-09-08 06:15:11,549 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:15:11,549 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 28] total 72 [2019-09-08 06:15:11,550 INFO L454 AbstractCegarLoop]: Interpolant automaton has 72 states [2019-09-08 06:15:11,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2019-09-08 06:15:11,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=4920, Unknown=0, NotChecked=0, Total=5112 [2019-09-08 06:15:11,551 INFO L87 Difference]: Start difference. First operand 54 states and 77 transitions. Second operand 72 states. [2019-09-08 06:15:15,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:15:15,253 INFO L93 Difference]: Finished difference Result 64 states and 87 transitions. [2019-09-08 06:15:15,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-08 06:15:15,254 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 100 [2019-09-08 06:15:15,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:15:15,255 INFO L225 Difference]: With dead ends: 64 [2019-09-08 06:15:15,256 INFO L226 Difference]: Without dead ends: 60 [2019-09-08 06:15:15,257 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1374 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=722, Invalid=8208, Unknown=0, NotChecked=0, Total=8930 [2019-09-08 06:15:15,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-09-08 06:15:15,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2019-09-08 06:15:15,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-09-08 06:15:15,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 77 transitions. [2019-09-08 06:15:15,263 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 77 transitions. Word has length 100 [2019-09-08 06:15:15,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:15:15,264 INFO L475 AbstractCegarLoop]: Abstraction has 54 states and 77 transitions. [2019-09-08 06:15:15,264 INFO L476 AbstractCegarLoop]: Interpolant automaton has 72 states. [2019-09-08 06:15:15,264 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 77 transitions. [2019-09-08 06:15:15,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-09-08 06:15:15,265 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:15:15,265 INFO L399 BasicCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:15:15,266 INFO L418 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:15:15,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:15:15,266 INFO L82 PathProgramCache]: Analyzing trace with hash -865344962, now seen corresponding path program 35 times [2019-09-08 06:15:15,266 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:15:15,266 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:15:15,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:15,267 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:15:15,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:15,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:15:17,006 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 3 proven. 491 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2019-09-08 06:15:17,006 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:15:17,006 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:15:17,019 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 06:15:17,082 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-09-08 06:15:17,082 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:15:17,087 WARN L254 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 168 conjunts are in the unsatisfiable core [2019-09-08 06:15:17,089 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:15:19,106 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 32 proven. 279 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2019-09-08 06:15:19,111 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:15:19,112 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 32] total 78 [2019-09-08 06:15:19,112 INFO L454 AbstractCegarLoop]: Interpolant automaton has 78 states [2019-09-08 06:15:19,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2019-09-08 06:15:19,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=5755, Unknown=0, NotChecked=0, Total=6006 [2019-09-08 06:15:19,113 INFO L87 Difference]: Start difference. First operand 54 states and 77 transitions. Second operand 78 states. [2019-09-08 06:15:22,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:15:22,575 INFO L93 Difference]: Finished difference Result 64 states and 87 transitions. [2019-09-08 06:15:22,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-08 06:15:22,576 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 107 [2019-09-08 06:15:22,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:15:22,578 INFO L225 Difference]: With dead ends: 64 [2019-09-08 06:15:22,578 INFO L226 Difference]: Without dead ends: 60 [2019-09-08 06:15:22,580 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1526 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=762, Invalid=8940, Unknown=0, NotChecked=0, Total=9702 [2019-09-08 06:15:22,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-09-08 06:15:22,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2019-09-08 06:15:22,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-09-08 06:15:22,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 77 transitions. [2019-09-08 06:15:22,586 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 77 transitions. Word has length 107 [2019-09-08 06:15:22,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:15:22,587 INFO L475 AbstractCegarLoop]: Abstraction has 54 states and 77 transitions. [2019-09-08 06:15:22,587 INFO L476 AbstractCegarLoop]: Interpolant automaton has 78 states. [2019-09-08 06:15:22,587 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 77 transitions. [2019-09-08 06:15:22,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-09-08 06:15:22,588 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:15:22,588 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:15:22,588 INFO L418 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:15:22,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:15:22,589 INFO L82 PathProgramCache]: Analyzing trace with hash -564676919, now seen corresponding path program 36 times [2019-09-08 06:15:22,589 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:15:22,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:15:22,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:22,590 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:15:22,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:22,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:15:24,673 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 2 proven. 572 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2019-09-08 06:15:24,674 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:15:24,674 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:15:24,687 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 06:15:24,740 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2019-09-08 06:15:24,740 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:15:24,745 WARN L254 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 181 conjunts are in the unsatisfiable core [2019-09-08 06:15:24,747 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:15:26,529 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 9 proven. 317 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2019-09-08 06:15:26,533 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:15:26,534 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 28] total 78 [2019-09-08 06:15:26,534 INFO L454 AbstractCegarLoop]: Interpolant automaton has 78 states [2019-09-08 06:15:26,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2019-09-08 06:15:26,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=5796, Unknown=0, NotChecked=0, Total=6006 [2019-09-08 06:15:26,535 INFO L87 Difference]: Start difference. First operand 54 states and 77 transitions. Second operand 78 states. [2019-09-08 06:15:30,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:15:30,336 INFO L93 Difference]: Finished difference Result 64 states and 87 transitions. [2019-09-08 06:15:30,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-08 06:15:30,337 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 114 [2019-09-08 06:15:30,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:15:30,338 INFO L225 Difference]: With dead ends: 64 [2019-09-08 06:15:30,339 INFO L226 Difference]: Without dead ends: 60 [2019-09-08 06:15:30,340 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1382 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=786, Invalid=9314, Unknown=0, NotChecked=0, Total=10100 [2019-09-08 06:15:30,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-09-08 06:15:30,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2019-09-08 06:15:30,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-09-08 06:15:30,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 77 transitions. [2019-09-08 06:15:30,345 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 77 transitions. Word has length 114 [2019-09-08 06:15:30,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:15:30,345 INFO L475 AbstractCegarLoop]: Abstraction has 54 states and 77 transitions. [2019-09-08 06:15:30,345 INFO L476 AbstractCegarLoop]: Interpolant automaton has 78 states. [2019-09-08 06:15:30,345 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 77 transitions. [2019-09-08 06:15:30,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-09-08 06:15:30,346 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:15:30,346 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:15:30,347 INFO L418 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:15:30,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:15:30,347 INFO L82 PathProgramCache]: Analyzing trace with hash -173240844, now seen corresponding path program 37 times [2019-09-08 06:15:30,347 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:15:30,347 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:15:30,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:30,348 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:15:30,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:30,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:15:32,379 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 2 proven. 658 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2019-09-08 06:15:32,380 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:15:32,380 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:15:32,393 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:15:32,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:15:32,442 WARN L254 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 191 conjunts are in the unsatisfiable core [2019-09-08 06:15:32,444 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:15:34,493 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 50 proven. 368 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2019-09-08 06:15:34,498 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:15:34,498 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 29] total 81 [2019-09-08 06:15:34,498 INFO L454 AbstractCegarLoop]: Interpolant automaton has 81 states [2019-09-08 06:15:34,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2019-09-08 06:15:34,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=6226, Unknown=0, NotChecked=0, Total=6480 [2019-09-08 06:15:34,500 INFO L87 Difference]: Start difference. First operand 54 states and 77 transitions. Second operand 81 states. [2019-09-08 06:15:38,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:15:38,068 INFO L93 Difference]: Finished difference Result 64 states and 87 transitions. [2019-09-08 06:15:38,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-08 06:15:38,069 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 121 [2019-09-08 06:15:38,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:15:38,070 INFO L225 Difference]: With dead ends: 64 [2019-09-08 06:15:38,070 INFO L226 Difference]: Without dead ends: 60 [2019-09-08 06:15:38,072 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1300 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=768, Invalid=9534, Unknown=0, NotChecked=0, Total=10302 [2019-09-08 06:15:38,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-09-08 06:15:38,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2019-09-08 06:15:38,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-09-08 06:15:38,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 77 transitions. [2019-09-08 06:15:38,077 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 77 transitions. Word has length 121 [2019-09-08 06:15:38,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:15:38,077 INFO L475 AbstractCegarLoop]: Abstraction has 54 states and 77 transitions. [2019-09-08 06:15:38,077 INFO L476 AbstractCegarLoop]: Interpolant automaton has 81 states. [2019-09-08 06:15:38,078 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 77 transitions. [2019-09-08 06:15:38,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-09-08 06:15:38,079 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:15:38,079 INFO L399 BasicCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:15:38,079 INFO L418 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:15:38,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:15:38,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1022743187, now seen corresponding path program 38 times [2019-09-08 06:15:38,079 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:15:38,080 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:15:38,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:38,080 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:15:38,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:38,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:15:40,231 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 2 proven. 744 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-09-08 06:15:40,231 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:15:40,231 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:15:40,245 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:15:40,288 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:15:40,289 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:15:40,293 WARN L254 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 203 conjunts are in the unsatisfiable core [2019-09-08 06:15:40,296 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:15:42,410 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 54 proven. 415 refuted. 0 times theorem prover too weak. 421 trivial. 0 not checked. [2019-09-08 06:15:42,414 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:15:42,415 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 29] total 82 [2019-09-08 06:15:42,415 INFO L454 AbstractCegarLoop]: Interpolant automaton has 82 states [2019-09-08 06:15:42,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2019-09-08 06:15:42,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=6387, Unknown=0, NotChecked=0, Total=6642 [2019-09-08 06:15:42,416 INFO L87 Difference]: Start difference. First operand 54 states and 77 transitions. Second operand 82 states. [2019-09-08 06:15:45,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:15:45,986 INFO L93 Difference]: Finished difference Result 62 states and 83 transitions. [2019-09-08 06:15:45,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-08 06:15:45,987 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 128 [2019-09-08 06:15:45,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:15:45,988 INFO L225 Difference]: With dead ends: 62 [2019-09-08 06:15:45,988 INFO L226 Difference]: Without dead ends: 58 [2019-09-08 06:15:45,989 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1300 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=752, Invalid=9754, Unknown=0, NotChecked=0, Total=10506 [2019-09-08 06:15:45,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-09-08 06:15:45,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2019-09-08 06:15:45,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-09-08 06:15:45,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 73 transitions. [2019-09-08 06:15:45,994 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 73 transitions. Word has length 128 [2019-09-08 06:15:45,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:15:45,995 INFO L475 AbstractCegarLoop]: Abstraction has 52 states and 73 transitions. [2019-09-08 06:15:45,995 INFO L476 AbstractCegarLoop]: Interpolant automaton has 82 states. [2019-09-08 06:15:45,995 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 73 transitions. [2019-09-08 06:15:45,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-09-08 06:15:45,996 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:15:45,996 INFO L399 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:15:45,996 INFO L418 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:15:45,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:15:45,997 INFO L82 PathProgramCache]: Analyzing trace with hash -192564829, now seen corresponding path program 39 times [2019-09-08 06:15:45,997 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:15:45,997 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:15:45,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:45,998 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:15:45,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:46,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:15:47,433 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-09-08 06:15:47,433 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:15:47,433 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:15:47,445 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 06:15:47,489 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2019-09-08 06:15:47,490 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:15:47,494 WARN L254 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 157 conjunts are in the unsatisfiable core [2019-09-08 06:15:47,497 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:15:48,873 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 9 proven. 233 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2019-09-08 06:15:48,885 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:15:48,886 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 24] total 68 [2019-09-08 06:15:48,886 INFO L454 AbstractCegarLoop]: Interpolant automaton has 68 states [2019-09-08 06:15:48,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2019-09-08 06:15:48,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=4372, Unknown=0, NotChecked=0, Total=4556 [2019-09-08 06:15:48,887 INFO L87 Difference]: Start difference. First operand 52 states and 73 transitions. Second operand 68 states. [2019-09-08 06:15:52,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:15:52,032 INFO L93 Difference]: Finished difference Result 64 states and 93 transitions. [2019-09-08 06:15:52,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-08 06:15:52,033 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 100 [2019-09-08 06:15:52,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:15:52,034 INFO L225 Difference]: With dead ends: 64 [2019-09-08 06:15:52,035 INFO L226 Difference]: Without dead ends: 58 [2019-09-08 06:15:52,036 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=630, Invalid=7202, Unknown=0, NotChecked=0, Total=7832 [2019-09-08 06:15:52,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-09-08 06:15:52,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2019-09-08 06:15:52,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-09-08 06:15:52,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 78 transitions. [2019-09-08 06:15:52,047 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 78 transitions. Word has length 100 [2019-09-08 06:15:52,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:15:52,047 INFO L475 AbstractCegarLoop]: Abstraction has 54 states and 78 transitions. [2019-09-08 06:15:52,047 INFO L476 AbstractCegarLoop]: Interpolant automaton has 68 states. [2019-09-08 06:15:52,047 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 78 transitions. [2019-09-08 06:15:52,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-09-08 06:15:52,048 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:15:52,048 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 18, 16, 16, 16, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:15:52,048 INFO L418 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:15:52,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:15:52,049 INFO L82 PathProgramCache]: Analyzing trace with hash -893562198, now seen corresponding path program 40 times [2019-09-08 06:15:52,049 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:15:52,049 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:15:52,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:52,050 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:15:52,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:52,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:15:54,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 2 proven. 848 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-09-08 06:15:54,484 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:15:54,484 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:15:54,505 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 06:15:54,554 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:15:54,555 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:15:54,559 WARN L254 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 217 conjunts are in the unsatisfiable core [2019-09-08 06:15:54,562 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:15:58,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 9 proven. 458 refuted. 0 times theorem prover too weak. 538 trivial. 0 not checked. [2019-09-08 06:15:58,733 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:15:58,733 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 28] total 87 [2019-09-08 06:15:58,735 INFO L454 AbstractCegarLoop]: Interpolant automaton has 87 states [2019-09-08 06:15:58,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2019-09-08 06:15:58,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=7245, Unknown=0, NotChecked=0, Total=7482 [2019-09-08 06:15:58,735 INFO L87 Difference]: Start difference. First operand 54 states and 78 transitions. Second operand 87 states. [2019-09-08 06:16:02,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:16:02,911 INFO L93 Difference]: Finished difference Result 64 states and 86 transitions. [2019-09-08 06:16:02,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-09-08 06:16:02,912 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 135 [2019-09-08 06:16:02,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:16:02,913 INFO L225 Difference]: With dead ends: 64 [2019-09-08 06:16:02,913 INFO L226 Difference]: Without dead ends: 58 [2019-09-08 06:16:02,914 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1498 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=894, Invalid=11538, Unknown=0, NotChecked=0, Total=12432 [2019-09-08 06:16:02,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-09-08 06:16:02,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2019-09-08 06:16:02,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-09-08 06:16:02,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 73 transitions. [2019-09-08 06:16:02,919 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 73 transitions. Word has length 135 [2019-09-08 06:16:02,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:16:02,919 INFO L475 AbstractCegarLoop]: Abstraction has 52 states and 73 transitions. [2019-09-08 06:16:02,919 INFO L476 AbstractCegarLoop]: Interpolant automaton has 87 states. [2019-09-08 06:16:02,920 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 73 transitions. [2019-09-08 06:16:02,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-09-08 06:16:02,920 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:16:02,921 INFO L399 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:16:02,921 INFO L418 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:16:02,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:16:02,921 INFO L82 PathProgramCache]: Analyzing trace with hash -992427037, now seen corresponding path program 41 times [2019-09-08 06:16:02,921 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:16:02,921 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:16:02,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:16:02,922 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:16:02,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:16:02,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:16:04,164 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 2 proven. 420 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-09-08 06:16:04,164 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:16:04,164 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:16:04,179 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 06:16:04,228 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-09-08 06:16:04,229 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:16:04,235 WARN L254 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 156 conjunts are in the unsatisfiable core [2019-09-08 06:16:04,238 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:16:06,091 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 40 proven. 234 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2019-09-08 06:16:06,095 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:16:06,096 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 33] total 73 [2019-09-08 06:16:06,096 INFO L454 AbstractCegarLoop]: Interpolant automaton has 73 states [2019-09-08 06:16:06,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2019-09-08 06:16:06,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=5037, Unknown=0, NotChecked=0, Total=5256 [2019-09-08 06:16:06,097 INFO L87 Difference]: Start difference. First operand 52 states and 73 transitions. Second operand 73 states. [2019-09-08 06:16:09,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:16:09,283 INFO L93 Difference]: Finished difference Result 65 states and 89 transitions. [2019-09-08 06:16:09,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-09-08 06:16:09,284 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 100 [2019-09-08 06:16:09,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:16:09,285 INFO L225 Difference]: With dead ends: 65 [2019-09-08 06:16:09,285 INFO L226 Difference]: Without dead ends: 61 [2019-09-08 06:16:09,287 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=675, Invalid=8445, Unknown=0, NotChecked=0, Total=9120 [2019-09-08 06:16:09,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-09-08 06:16:09,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2019-09-08 06:16:09,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-09-08 06:16:09,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 82 transitions. [2019-09-08 06:16:09,293 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 82 transitions. Word has length 100 [2019-09-08 06:16:09,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:16:09,293 INFO L475 AbstractCegarLoop]: Abstraction has 57 states and 82 transitions. [2019-09-08 06:16:09,293 INFO L476 AbstractCegarLoop]: Interpolant automaton has 73 states. [2019-09-08 06:16:09,293 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 82 transitions. [2019-09-08 06:16:09,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-09-08 06:16:09,294 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:16:09,294 INFO L399 BasicCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:16:09,295 INFO L418 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:16:09,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:16:09,295 INFO L82 PathProgramCache]: Analyzing trace with hash -445760116, now seen corresponding path program 42 times [2019-09-08 06:16:09,295 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:16:09,295 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:16:09,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:16:09,296 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:16:09,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:16:09,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:16:11,002 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 2 proven. 492 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2019-09-08 06:16:11,002 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:16:11,002 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:16:11,014 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 06:16:11,058 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2019-09-08 06:16:11,058 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:16:11,062 WARN L254 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 169 conjunts are in the unsatisfiable core [2019-09-08 06:16:11,064 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:16:12,939 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 21 proven. 268 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2019-09-08 06:16:12,946 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:16:12,946 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 30] total 77 [2019-09-08 06:16:12,946 INFO L454 AbstractCegarLoop]: Interpolant automaton has 77 states [2019-09-08 06:16:12,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2019-09-08 06:16:12,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=5647, Unknown=0, NotChecked=0, Total=5852 [2019-09-08 06:16:12,947 INFO L87 Difference]: Start difference. First operand 57 states and 82 transitions. Second operand 77 states. [2019-09-08 06:16:17,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:16:17,049 INFO L93 Difference]: Finished difference Result 67 states and 92 transitions. [2019-09-08 06:16:17,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-09-08 06:16:17,050 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 107 [2019-09-08 06:16:17,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:16:17,051 INFO L225 Difference]: With dead ends: 67 [2019-09-08 06:16:17,051 INFO L226 Difference]: Without dead ends: 63 [2019-09-08 06:16:17,053 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1604 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=808, Invalid=9494, Unknown=0, NotChecked=0, Total=10302 [2019-09-08 06:16:17,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-09-08 06:16:17,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2019-09-08 06:16:17,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-09-08 06:16:17,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 82 transitions. [2019-09-08 06:16:17,059 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 82 transitions. Word has length 107 [2019-09-08 06:16:17,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:16:17,060 INFO L475 AbstractCegarLoop]: Abstraction has 57 states and 82 transitions. [2019-09-08 06:16:17,060 INFO L476 AbstractCegarLoop]: Interpolant automaton has 77 states. [2019-09-08 06:16:17,060 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 82 transitions. [2019-09-08 06:16:17,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-09-08 06:16:17,061 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:16:17,061 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:16:17,061 INFO L418 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:16:17,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:16:17,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1805961107, now seen corresponding path program 43 times [2019-09-08 06:16:17,062 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:16:17,062 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:16:17,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:16:17,063 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:16:17,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:16:17,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:16:19,054 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 2 proven. 572 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2019-09-08 06:16:19,055 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:16:19,055 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:16:19,068 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:16:19,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:16:19,116 WARN L254 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 179 conjunts are in the unsatisfiable core [2019-09-08 06:16:19,118 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:16:21,313 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 46 proven. 327 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2019-09-08 06:16:21,319 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:16:21,319 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 31] total 80 [2019-09-08 06:16:21,320 INFO L454 AbstractCegarLoop]: Interpolant automaton has 80 states [2019-09-08 06:16:21,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2019-09-08 06:16:21,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=6073, Unknown=0, NotChecked=0, Total=6320 [2019-09-08 06:16:21,321 INFO L87 Difference]: Start difference. First operand 57 states and 82 transitions. Second operand 80 states. [2019-09-08 06:16:25,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:16:25,199 INFO L93 Difference]: Finished difference Result 67 states and 92 transitions. [2019-09-08 06:16:25,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-09-08 06:16:25,199 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 114 [2019-09-08 06:16:25,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:16:25,199 INFO L225 Difference]: With dead ends: 67 [2019-09-08 06:16:25,200 INFO L226 Difference]: Without dead ends: 63 [2019-09-08 06:16:25,200 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1502 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=788, Invalid=9718, Unknown=0, NotChecked=0, Total=10506 [2019-09-08 06:16:25,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-09-08 06:16:25,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2019-09-08 06:16:25,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-09-08 06:16:25,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 82 transitions. [2019-09-08 06:16:25,206 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 82 transitions. Word has length 114 [2019-09-08 06:16:25,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:16:25,206 INFO L475 AbstractCegarLoop]: Abstraction has 57 states and 82 transitions. [2019-09-08 06:16:25,206 INFO L476 AbstractCegarLoop]: Interpolant automaton has 80 states. [2019-09-08 06:16:25,206 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 82 transitions. [2019-09-08 06:16:25,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-09-08 06:16:25,207 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:16:25,208 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:16:25,208 INFO L418 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:16:25,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:16:25,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1954300290, now seen corresponding path program 44 times [2019-09-08 06:16:25,208 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:16:25,208 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:16:25,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:16:25,209 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:16:25,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:16:25,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:16:27,252 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 2 proven. 658 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2019-09-08 06:16:27,253 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:16:27,253 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:16:27,267 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:16:27,312 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:16:27,312 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:16:27,317 WARN L254 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 191 conjunts are in the unsatisfiable core [2019-09-08 06:16:27,320 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:16:29,567 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 50 proven. 371 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2019-09-08 06:16:29,572 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:16:29,573 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 31] total 83 [2019-09-08 06:16:29,573 INFO L454 AbstractCegarLoop]: Interpolant automaton has 83 states [2019-09-08 06:16:29,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2019-09-08 06:16:29,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=6548, Unknown=0, NotChecked=0, Total=6806 [2019-09-08 06:16:29,574 INFO L87 Difference]: Start difference. First operand 57 states and 82 transitions. Second operand 83 states. [2019-09-08 06:16:33,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:16:33,735 INFO L93 Difference]: Finished difference Result 67 states and 92 transitions. [2019-09-08 06:16:33,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-09-08 06:16:33,735 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 121 [2019-09-08 06:16:33,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:16:33,737 INFO L225 Difference]: With dead ends: 67 [2019-09-08 06:16:33,737 INFO L226 Difference]: Without dead ends: 63 [2019-09-08 06:16:33,738 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1506 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=822, Invalid=10308, Unknown=0, NotChecked=0, Total=11130 [2019-09-08 06:16:33,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-09-08 06:16:33,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2019-09-08 06:16:33,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-09-08 06:16:33,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 82 transitions. [2019-09-08 06:16:33,745 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 82 transitions. Word has length 121 [2019-09-08 06:16:33,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:16:33,746 INFO L475 AbstractCegarLoop]: Abstraction has 57 states and 82 transitions. [2019-09-08 06:16:33,746 INFO L476 AbstractCegarLoop]: Interpolant automaton has 83 states. [2019-09-08 06:16:33,746 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 82 transitions. [2019-09-08 06:16:33,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-09-08 06:16:33,747 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:16:33,747 INFO L399 BasicCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:16:33,747 INFO L418 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:16:33,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:16:33,748 INFO L82 PathProgramCache]: Analyzing trace with hash -970320905, now seen corresponding path program 45 times [2019-09-08 06:16:33,748 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:16:33,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:16:33,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:16:33,749 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:16:33,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:16:33,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:16:35,893 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 3 proven. 746 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2019-09-08 06:16:35,893 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:16:35,894 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:16:35,905 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 06:16:35,967 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2019-09-08 06:16:35,967 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:16:35,973 WARN L254 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 205 conjunts are in the unsatisfiable core [2019-09-08 06:16:35,976 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:16:37,961 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 21 proven. 400 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2019-09-08 06:16:37,965 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:16:37,965 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 30] total 85 [2019-09-08 06:16:37,966 INFO L454 AbstractCegarLoop]: Interpolant automaton has 85 states [2019-09-08 06:16:37,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2019-09-08 06:16:37,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=6909, Unknown=0, NotChecked=0, Total=7140 [2019-09-08 06:16:37,968 INFO L87 Difference]: Start difference. First operand 57 states and 82 transitions. Second operand 85 states. [2019-09-08 06:16:42,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:16:42,080 INFO L93 Difference]: Finished difference Result 67 states and 92 transitions. [2019-09-08 06:16:42,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-09-08 06:16:42,081 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 128 [2019-09-08 06:16:42,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:16:42,083 INFO L225 Difference]: With dead ends: 67 [2019-09-08 06:16:42,083 INFO L226 Difference]: Without dead ends: 63 [2019-09-08 06:16:42,085 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1676 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=886, Invalid=11104, Unknown=0, NotChecked=0, Total=11990 [2019-09-08 06:16:42,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-09-08 06:16:42,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2019-09-08 06:16:42,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-09-08 06:16:42,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 82 transitions. [2019-09-08 06:16:42,091 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 82 transitions. Word has length 128 [2019-09-08 06:16:42,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:16:42,091 INFO L475 AbstractCegarLoop]: Abstraction has 57 states and 82 transitions. [2019-09-08 06:16:42,091 INFO L476 AbstractCegarLoop]: Interpolant automaton has 85 states. [2019-09-08 06:16:42,091 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 82 transitions. [2019-09-08 06:16:42,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-09-08 06:16:42,093 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:16:42,093 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 18, 16, 16, 16, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:16:42,093 INFO L418 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:16:42,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:16:42,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1081659784, now seen corresponding path program 46 times [2019-09-08 06:16:42,094 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:16:42,094 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:16:42,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:16:42,095 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:16:42,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:16:42,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:16:44,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 2 proven. 845 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2019-09-08 06:16:44,624 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:16:44,625 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:16:44,639 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 06:16:44,702 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:16:44,703 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:16:44,708 WARN L254 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 217 conjunts are in the unsatisfiable core [2019-09-08 06:16:44,711 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:16:49,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 10 proven. 460 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2019-09-08 06:16:49,304 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:16:49,305 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 30] total 88 [2019-09-08 06:16:49,306 INFO L454 AbstractCegarLoop]: Interpolant automaton has 88 states [2019-09-08 06:16:49,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2019-09-08 06:16:49,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=7418, Unknown=0, NotChecked=0, Total=7656 [2019-09-08 06:16:49,308 INFO L87 Difference]: Start difference. First operand 57 states and 82 transitions. Second operand 88 states. [2019-09-08 06:16:53,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:16:53,708 INFO L93 Difference]: Finished difference Result 67 states and 92 transitions. [2019-09-08 06:16:53,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-09-08 06:16:53,709 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 135 [2019-09-08 06:16:53,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:16:53,710 INFO L225 Difference]: With dead ends: 67 [2019-09-08 06:16:53,711 INFO L226 Difference]: Without dead ends: 63 [2019-09-08 06:16:53,713 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1605 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=918, Invalid=11738, Unknown=0, NotChecked=0, Total=12656 [2019-09-08 06:16:53,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-09-08 06:16:53,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2019-09-08 06:16:53,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-09-08 06:16:53,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 82 transitions. [2019-09-08 06:16:53,719 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 82 transitions. Word has length 135 [2019-09-08 06:16:53,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:16:53,719 INFO L475 AbstractCegarLoop]: Abstraction has 57 states and 82 transitions. [2019-09-08 06:16:53,719 INFO L476 AbstractCegarLoop]: Interpolant automaton has 88 states. [2019-09-08 06:16:53,719 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 82 transitions. [2019-09-08 06:16:53,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-09-08 06:16:53,720 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:16:53,720 INFO L399 BasicCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:16:53,721 INFO L418 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:16:53,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:16:53,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1602926209, now seen corresponding path program 47 times [2019-09-08 06:16:53,721 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:16:53,721 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:16:53,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:16:53,723 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:16:53,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:16:53,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:16:56,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 2 proven. 952 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2019-09-08 06:16:56,608 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:16:56,608 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:16:56,625 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 06:16:56,693 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2019-09-08 06:16:56,694 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:16:56,701 WARN L254 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 228 conjunts are in the unsatisfiable core [2019-09-08 06:16:56,705 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:16:59,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 43 proven. 516 refuted. 0 times theorem prover too weak. 568 trivial. 0 not checked. [2019-09-08 06:16:59,543 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:16:59,543 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 34] total 95 [2019-09-08 06:16:59,544 INFO L454 AbstractCegarLoop]: Interpolant automaton has 95 states [2019-09-08 06:16:59,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2019-09-08 06:16:59,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=8622, Unknown=0, NotChecked=0, Total=8930 [2019-09-08 06:16:59,545 INFO L87 Difference]: Start difference. First operand 57 states and 82 transitions. Second operand 95 states. [2019-09-08 06:17:04,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:17:04,521 INFO L93 Difference]: Finished difference Result 65 states and 88 transitions. [2019-09-08 06:17:04,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-09-08 06:17:04,521 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 142 [2019-09-08 06:17:04,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:17:04,523 INFO L225 Difference]: With dead ends: 65 [2019-09-08 06:17:04,523 INFO L226 Difference]: Without dead ends: 61 [2019-09-08 06:17:04,525 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1707 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=984, Invalid=12822, Unknown=0, NotChecked=0, Total=13806 [2019-09-08 06:17:04,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-09-08 06:17:04,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2019-09-08 06:17:04,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-09-08 06:17:04,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 78 transitions. [2019-09-08 06:17:04,531 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 78 transitions. Word has length 142 [2019-09-08 06:17:04,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:17:04,531 INFO L475 AbstractCegarLoop]: Abstraction has 55 states and 78 transitions. [2019-09-08 06:17:04,531 INFO L476 AbstractCegarLoop]: Interpolant automaton has 95 states. [2019-09-08 06:17:04,532 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 78 transitions. [2019-09-08 06:17:04,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-09-08 06:17:04,532 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:17:04,533 INFO L399 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:17:04,533 INFO L418 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:17:04,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:17:04,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1116176261, now seen corresponding path program 48 times [2019-09-08 06:17:04,534 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:17:04,534 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:17:04,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:17:04,535 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:17:04,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:17:04,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:17:05,570 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 2 proven. 288 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-09-08 06:17:05,570 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:17:05,570 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:17:05,585 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 06:17:05,623 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-09-08 06:17:05,624 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:17:05,628 WARN L254 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 133 conjunts are in the unsatisfiable core [2019-09-08 06:17:05,631 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:17:06,847 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 3 proven. 175 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-09-08 06:17:06,853 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:17:06,853 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 26] total 62 [2019-09-08 06:17:06,854 INFO L454 AbstractCegarLoop]: Interpolant automaton has 62 states [2019-09-08 06:17:06,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2019-09-08 06:17:06,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=3619, Unknown=0, NotChecked=0, Total=3782 [2019-09-08 06:17:06,855 INFO L87 Difference]: Start difference. First operand 55 states and 78 transitions. Second operand 62 states. [2019-09-08 06:17:09,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:17:09,292 INFO L93 Difference]: Finished difference Result 65 states and 97 transitions. [2019-09-08 06:17:09,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-08 06:17:09,293 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 86 [2019-09-08 06:17:09,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:17:09,294 INFO L225 Difference]: With dead ends: 65 [2019-09-08 06:17:09,294 INFO L226 Difference]: Without dead ends: 61 [2019-09-08 06:17:09,295 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1065 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=567, Invalid=6239, Unknown=0, NotChecked=0, Total=6806 [2019-09-08 06:17:09,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-09-08 06:17:09,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2019-09-08 06:17:09,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-09-08 06:17:09,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 90 transitions. [2019-09-08 06:17:09,300 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 90 transitions. Word has length 86 [2019-09-08 06:17:09,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:17:09,300 INFO L475 AbstractCegarLoop]: Abstraction has 57 states and 90 transitions. [2019-09-08 06:17:09,300 INFO L476 AbstractCegarLoop]: Interpolant automaton has 62 states. [2019-09-08 06:17:09,300 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 90 transitions. [2019-09-08 06:17:09,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-09-08 06:17:09,301 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:17:09,301 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:17:09,301 INFO L418 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:17:09,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:17:09,302 INFO L82 PathProgramCache]: Analyzing trace with hash -10155430, now seen corresponding path program 49 times [2019-09-08 06:17:09,302 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:17:09,302 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:17:09,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:17:09,303 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:17:09,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:17:09,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:17:11,349 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 0 proven. 657 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2019-09-08 06:17:11,349 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:17:11,349 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:17:11,361 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:17:11,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:17:11,408 WARN L254 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 191 conjunts are in the unsatisfiable core [2019-09-08 06:17:11,410 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:17:13,290 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 50 proven. 365 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (51)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 06:17:13,296 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:17:13,296 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 27] total 78 [2019-09-08 06:17:13,296 INFO L454 AbstractCegarLoop]: Interpolant automaton has 78 states [2019-09-08 06:17:13,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2019-09-08 06:17:13,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=5761, Unknown=0, NotChecked=0, Total=6006 [2019-09-08 06:17:13,297 INFO L87 Difference]: Start difference. First operand 57 states and 90 transitions. Second operand 78 states. [2019-09-08 06:17:16,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:17:16,728 INFO L93 Difference]: Finished difference Result 67 states and 98 transitions. [2019-09-08 06:17:16,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-08 06:17:16,729 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 121 [2019-09-08 06:17:16,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:17:16,730 INFO L225 Difference]: With dead ends: 67 [2019-09-08 06:17:16,731 INFO L226 Difference]: Without dead ends: 61 [2019-09-08 06:17:16,732 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1165 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=704, Invalid=8998, Unknown=0, NotChecked=0, Total=9702 [2019-09-08 06:17:16,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-09-08 06:17:16,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2019-09-08 06:17:16,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-09-08 06:17:16,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 83 transitions. [2019-09-08 06:17:16,737 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 83 transitions. Word has length 121 [2019-09-08 06:17:16,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:17:16,738 INFO L475 AbstractCegarLoop]: Abstraction has 57 states and 83 transitions. [2019-09-08 06:17:16,738 INFO L476 AbstractCegarLoop]: Interpolant automaton has 78 states. [2019-09-08 06:17:16,738 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 83 transitions. [2019-09-08 06:17:16,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-09-08 06:17:16,740 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:17:16,740 INFO L399 BasicCegarLoop]: trace histogram [20, 20, 20, 18, 18, 18, 18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:17:16,741 INFO L418 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:17:16,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:17:16,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1655069586, now seen corresponding path program 50 times [2019-09-08 06:17:16,741 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:17:16,741 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:17:16,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:17:16,742 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:17:16,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:17:16,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:17:19,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 2 proven. 1059 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2019-09-08 06:17:19,568 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:17:19,568 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:17:19,581 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:17:19,640 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:17:19,640 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:17:19,645 WARN L254 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 239 conjunts are in the unsatisfiable core [2019-09-08 06:17:19,648 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:17:22,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 66 proven. 577 refuted. 0 times theorem prover too weak. 613 trivial. 0 not checked. [2019-09-08 06:17:22,257 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:17:22,257 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 31] total 94 [2019-09-08 06:17:22,258 INFO L454 AbstractCegarLoop]: Interpolant automaton has 94 states [2019-09-08 06:17:22,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2019-09-08 06:17:22,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=8445, Unknown=0, NotChecked=0, Total=8742 [2019-09-08 06:17:22,259 INFO L87 Difference]: Start difference. First operand 57 states and 83 transitions. Second operand 94 states. [2019-09-08 06:17:26,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:17:26,473 INFO L93 Difference]: Finished difference Result 67 states and 91 transitions. [2019-09-08 06:17:26,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-09-08 06:17:26,473 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 149 [2019-09-08 06:17:26,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:17:26,475 INFO L225 Difference]: With dead ends: 67 [2019-09-08 06:17:26,475 INFO L226 Difference]: Without dead ends: 61 [2019-09-08 06:17:26,476 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1629 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=944, Invalid=13098, Unknown=0, NotChecked=0, Total=14042 [2019-09-08 06:17:26,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-09-08 06:17:26,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2019-09-08 06:17:26,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-09-08 06:17:26,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 78 transitions. [2019-09-08 06:17:26,481 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 78 transitions. Word has length 149 [2019-09-08 06:17:26,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:17:26,482 INFO L475 AbstractCegarLoop]: Abstraction has 55 states and 78 transitions. [2019-09-08 06:17:26,482 INFO L476 AbstractCegarLoop]: Interpolant automaton has 94 states. [2019-09-08 06:17:26,482 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 78 transitions. [2019-09-08 06:17:26,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-09-08 06:17:26,483 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:17:26,483 INFO L399 BasicCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:17:26,483 INFO L418 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:17:26,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:17:26,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1733939138, now seen corresponding path program 51 times [2019-09-08 06:17:26,484 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:17:26,484 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:17:26,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:17:26,484 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:17:26,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:17:26,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:17:27,855 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 2 proven. 494 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-09-08 06:17:27,855 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:17:27,855 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:17:27,868 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 06:17:27,911 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2019-09-08 06:17:27,911 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:17:27,914 WARN L254 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 169 conjunts are in the unsatisfiable core [2019-09-08 06:17:27,916 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:17:29,788 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 11 proven. 280 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2019-09-08 06:17:29,792 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:17:29,793 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 32] total 76 [2019-09-08 06:17:29,793 INFO L454 AbstractCegarLoop]: Interpolant automaton has 76 states [2019-09-08 06:17:29,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2019-09-08 06:17:29,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=5502, Unknown=0, NotChecked=0, Total=5700 [2019-09-08 06:17:29,794 INFO L87 Difference]: Start difference. First operand 55 states and 78 transitions. Second operand 76 states. [2019-09-08 06:17:33,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:17:33,957 INFO L93 Difference]: Finished difference Result 68 states and 94 transitions. [2019-09-08 06:17:33,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-08 06:17:33,958 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 107 [2019-09-08 06:17:33,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:17:33,959 INFO L225 Difference]: With dead ends: 68 [2019-09-08 06:17:33,959 INFO L226 Difference]: Without dead ends: 64 [2019-09-08 06:17:33,960 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1554 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=738, Invalid=9564, Unknown=0, NotChecked=0, Total=10302 [2019-09-08 06:17:33,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-09-08 06:17:33,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2019-09-08 06:17:33,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-09-08 06:17:33,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 87 transitions. [2019-09-08 06:17:33,965 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 87 transitions. Word has length 107 [2019-09-08 06:17:33,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:17:33,966 INFO L475 AbstractCegarLoop]: Abstraction has 60 states and 87 transitions. [2019-09-08 06:17:33,966 INFO L476 AbstractCegarLoop]: Interpolant automaton has 76 states. [2019-09-08 06:17:33,966 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 87 transitions. [2019-09-08 06:17:33,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-09-08 06:17:33,967 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:17:33,967 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:17:33,967 INFO L418 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:17:33,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:17:33,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1739770251, now seen corresponding path program 52 times [2019-09-08 06:17:33,968 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:17:33,968 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:17:33,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:17:33,969 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:17:33,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:17:33,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:17:35,740 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 2 proven. 572 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2019-09-08 06:17:35,740 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:17:35,740 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:17:35,752 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 06:17:35,792 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:17:35,792 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:17:35,796 WARN L254 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 181 conjunts are in the unsatisfiable core [2019-09-08 06:17:35,799 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:17:38,175 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 11 proven. 321 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2019-09-08 06:17:38,180 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:17:38,180 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 32] total 82 [2019-09-08 06:17:38,180 INFO L454 AbstractCegarLoop]: Interpolant automaton has 82 states [2019-09-08 06:17:38,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2019-09-08 06:17:38,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=6424, Unknown=0, NotChecked=0, Total=6642 [2019-09-08 06:17:38,181 INFO L87 Difference]: Start difference. First operand 60 states and 87 transitions. Second operand 82 states. [2019-09-08 06:17:42,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:17:42,763 INFO L93 Difference]: Finished difference Result 70 states and 97 transitions. [2019-09-08 06:17:42,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-09-08 06:17:42,763 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 114 [2019-09-08 06:17:42,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:17:42,764 INFO L225 Difference]: With dead ends: 70 [2019-09-08 06:17:42,764 INFO L226 Difference]: Without dead ends: 66 [2019-09-08 06:17:42,765 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1822 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=898, Invalid=10874, Unknown=0, NotChecked=0, Total=11772 [2019-09-08 06:17:42,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-09-08 06:17:42,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2019-09-08 06:17:42,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-09-08 06:17:42,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 87 transitions. [2019-09-08 06:17:42,772 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 87 transitions. Word has length 114 [2019-09-08 06:17:42,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:17:42,772 INFO L475 AbstractCegarLoop]: Abstraction has 60 states and 87 transitions. [2019-09-08 06:17:42,772 INFO L476 AbstractCegarLoop]: Interpolant automaton has 82 states. [2019-09-08 06:17:42,772 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 87 transitions. [2019-09-08 06:17:42,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-09-08 06:17:42,773 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:17:42,773 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:17:42,774 INFO L418 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:17:42,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:17:42,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1164219276, now seen corresponding path program 53 times [2019-09-08 06:17:42,774 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:17:42,774 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:17:42,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:17:42,775 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:17:42,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:17:42,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:17:44,901 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 2 proven. 658 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2019-09-08 06:17:44,901 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:17:44,902 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:17:44,915 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 06:17:44,965 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2019-09-08 06:17:44,966 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:17:44,971 WARN L254 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 192 conjunts are in the unsatisfiable core [2019-09-08 06:17:44,973 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:17:47,226 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 48 proven. 358 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2019-09-08 06:17:47,231 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:17:47,231 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 35] total 87 [2019-09-08 06:17:47,232 INFO L454 AbstractCegarLoop]: Interpolant automaton has 87 states [2019-09-08 06:17:47,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2019-09-08 06:17:47,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=7209, Unknown=0, NotChecked=0, Total=7482 [2019-09-08 06:17:47,232 INFO L87 Difference]: Start difference. First operand 60 states and 87 transitions. Second operand 87 states. [2019-09-08 06:17:50,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:17:50,927 INFO L93 Difference]: Finished difference Result 70 states and 97 transitions. [2019-09-08 06:17:50,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-09-08 06:17:50,927 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 121 [2019-09-08 06:17:50,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:17:50,929 INFO L225 Difference]: With dead ends: 70 [2019-09-08 06:17:50,929 INFO L226 Difference]: Without dead ends: 66 [2019-09-08 06:17:50,930 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1891 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=911, Invalid=11521, Unknown=0, NotChecked=0, Total=12432 [2019-09-08 06:17:50,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-09-08 06:17:50,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2019-09-08 06:17:50,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-09-08 06:17:50,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 87 transitions. [2019-09-08 06:17:50,935 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 87 transitions. Word has length 121 [2019-09-08 06:17:50,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:17:50,936 INFO L475 AbstractCegarLoop]: Abstraction has 60 states and 87 transitions. [2019-09-08 06:17:50,936 INFO L476 AbstractCegarLoop]: Interpolant automaton has 87 states. [2019-09-08 06:17:50,936 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 87 transitions. [2019-09-08 06:17:50,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-09-08 06:17:50,937 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:17:50,937 INFO L399 BasicCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:17:50,937 INFO L418 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:17:50,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:17:50,938 INFO L82 PathProgramCache]: Analyzing trace with hash 325513663, now seen corresponding path program 54 times [2019-09-08 06:17:50,938 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:17:50,938 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:17:50,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:17:50,939 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:17:50,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:17:50,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:17:53,505 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 2 proven. 750 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2019-09-08 06:17:53,505 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:17:53,505 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:17:53,517 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 06:17:53,571 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2019-09-08 06:17:53,571 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:17:53,576 WARN L254 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 205 conjunts are in the unsatisfiable core [2019-09-08 06:17:53,578 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:17:55,874 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 11 proven. 412 refuted. 0 times theorem prover too weak. 467 trivial. 0 not checked. [2019-09-08 06:17:55,878 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:17:55,879 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 32] total 88 [2019-09-08 06:17:55,879 INFO L454 AbstractCegarLoop]: Interpolant automaton has 88 states [2019-09-08 06:17:55,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2019-09-08 06:17:55,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=7420, Unknown=0, NotChecked=0, Total=7656 [2019-09-08 06:17:55,880 INFO L87 Difference]: Start difference. First operand 60 states and 87 transitions. Second operand 88 states. [2019-09-08 06:18:00,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:18:00,650 INFO L93 Difference]: Finished difference Result 70 states and 97 transitions. [2019-09-08 06:18:00,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-09-08 06:18:00,650 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 128 [2019-09-08 06:18:00,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:18:00,652 INFO L225 Difference]: With dead ends: 70 [2019-09-08 06:18:00,652 INFO L226 Difference]: Without dead ends: 66 [2019-09-08 06:18:00,654 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=970, Invalid=12140, Unknown=0, NotChecked=0, Total=13110 [2019-09-08 06:18:00,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-09-08 06:18:00,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2019-09-08 06:18:00,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-09-08 06:18:00,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 87 transitions. [2019-09-08 06:18:00,659 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 87 transitions. Word has length 128 [2019-09-08 06:18:00,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:18:00,659 INFO L475 AbstractCegarLoop]: Abstraction has 60 states and 87 transitions. [2019-09-08 06:18:00,660 INFO L476 AbstractCegarLoop]: Interpolant automaton has 88 states. [2019-09-08 06:18:00,660 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 87 transitions. [2019-09-08 06:18:00,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-09-08 06:18:00,661 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:18:00,661 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 18, 16, 16, 16, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:18:00,661 INFO L418 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:18:00,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:18:00,661 INFO L82 PathProgramCache]: Analyzing trace with hash 634544554, now seen corresponding path program 55 times [2019-09-08 06:18:00,661 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:18:00,662 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:18:00,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:18:00,662 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:18:00,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:18:00,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:18:03,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 2 proven. 848 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-09-08 06:18:03,130 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:18:03,130 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:18:03,143 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:18:03,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:18:03,195 WARN L254 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 215 conjunts are in the unsatisfiable core [2019-09-08 06:18:03,197 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:18:05,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 58 proven. 471 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2019-09-08 06:18:05,792 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:18:05,792 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 33] total 91 [2019-09-08 06:18:05,793 INFO L454 AbstractCegarLoop]: Interpolant automaton has 91 states [2019-09-08 06:18:05,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2019-09-08 06:18:05,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=7906, Unknown=0, NotChecked=0, Total=8190 [2019-09-08 06:18:05,794 INFO L87 Difference]: Start difference. First operand 60 states and 87 transitions. Second operand 91 states. [2019-09-08 06:18:10,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:18:10,170 INFO L93 Difference]: Finished difference Result 70 states and 97 transitions. [2019-09-08 06:18:10,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-09-08 06:18:10,170 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 135 [2019-09-08 06:18:10,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:18:10,172 INFO L225 Difference]: With dead ends: 70 [2019-09-08 06:18:10,172 INFO L226 Difference]: Without dead ends: 66 [2019-09-08 06:18:10,174 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1736 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=948, Invalid=12392, Unknown=0, NotChecked=0, Total=13340 [2019-09-08 06:18:10,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-09-08 06:18:10,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2019-09-08 06:18:10,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-09-08 06:18:10,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 87 transitions. [2019-09-08 06:18:10,178 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 87 transitions. Word has length 135 [2019-09-08 06:18:10,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:18:10,179 INFO L475 AbstractCegarLoop]: Abstraction has 60 states and 87 transitions. [2019-09-08 06:18:10,179 INFO L476 AbstractCegarLoop]: Interpolant automaton has 91 states. [2019-09-08 06:18:10,179 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 87 transitions. [2019-09-08 06:18:10,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-09-08 06:18:10,180 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:18:10,180 INFO L399 BasicCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:18:10,180 INFO L418 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:18:10,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:18:10,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1864653815, now seen corresponding path program 56 times [2019-09-08 06:18:10,180 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:18:10,181 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:18:10,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:18:10,181 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:18:10,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:18:10,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:18:12,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 2 proven. 952 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2019-09-08 06:18:12,869 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:18:12,869 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:18:12,886 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:18:12,937 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:18:12,937 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:18:12,942 WARN L254 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 227 conjunts are in the unsatisfiable core [2019-09-08 06:18:12,944 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:18:17,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 62 proven. 524 refuted. 0 times theorem prover too weak. 541 trivial. 0 not checked. [2019-09-08 06:18:17,766 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:18:17,766 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 33] total 94 [2019-09-08 06:18:17,766 INFO L454 AbstractCegarLoop]: Interpolant automaton has 94 states [2019-09-08 06:18:17,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2019-09-08 06:18:17,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=8447, Unknown=0, NotChecked=0, Total=8742 [2019-09-08 06:18:17,767 INFO L87 Difference]: Start difference. First operand 60 states and 87 transitions. Second operand 94 states. [2019-09-08 06:18:22,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:18:22,107 INFO L93 Difference]: Finished difference Result 70 states and 97 transitions. [2019-09-08 06:18:22,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-09-08 06:18:22,113 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 142 [2019-09-08 06:18:22,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:18:22,114 INFO L225 Difference]: With dead ends: 70 [2019-09-08 06:18:22,114 INFO L226 Difference]: Without dead ends: 66 [2019-09-08 06:18:22,115 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1741 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=984, Invalid=13058, Unknown=0, NotChecked=0, Total=14042 [2019-09-08 06:18:22,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-09-08 06:18:22,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2019-09-08 06:18:22,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-09-08 06:18:22,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 87 transitions. [2019-09-08 06:18:22,120 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 87 transitions. Word has length 142 [2019-09-08 06:18:22,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:18:22,120 INFO L475 AbstractCegarLoop]: Abstraction has 60 states and 87 transitions. [2019-09-08 06:18:22,121 INFO L476 AbstractCegarLoop]: Interpolant automaton has 94 states. [2019-09-08 06:18:22,121 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 87 transitions. [2019-09-08 06:18:22,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-09-08 06:18:22,122 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:18:22,122 INFO L399 BasicCegarLoop]: trace histogram [20, 20, 20, 18, 18, 18, 18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:18:22,122 INFO L418 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:18:22,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:18:22,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1103515680, now seen corresponding path program 57 times [2019-09-08 06:18:22,123 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:18:22,123 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:18:22,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:18:22,124 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:18:22,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:18:22,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:18:25,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 2 proven. 1062 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2019-09-08 06:18:25,201 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:18:25,201 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:18:25,214 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 06:18:25,290 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2019-09-08 06:18:25,290 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:18:25,295 WARN L254 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 241 conjunts are in the unsatisfiable core [2019-09-08 06:18:25,299 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:18:28,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 11 proven. 571 refuted. 0 times theorem prover too weak. 674 trivial. 0 not checked. [2019-09-08 06:18:28,119 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:18:28,120 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 32] total 97 [2019-09-08 06:18:28,120 INFO L454 AbstractCegarLoop]: Interpolant automaton has 97 states [2019-09-08 06:18:28,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2019-09-08 06:18:28,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=9049, Unknown=0, NotChecked=0, Total=9312 [2019-09-08 06:18:28,122 INFO L87 Difference]: Start difference. First operand 60 states and 87 transitions. Second operand 97 states. [2019-09-08 06:18:34,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:18:34,305 INFO L93 Difference]: Finished difference Result 70 states and 97 transitions. [2019-09-08 06:18:34,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-09-08 06:18:34,306 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 149 [2019-09-08 06:18:34,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:18:34,308 INFO L225 Difference]: With dead ends: 70 [2019-09-08 06:18:34,308 INFO L226 Difference]: Without dead ends: 66 [2019-09-08 06:18:34,310 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1842 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=1078, Invalid=14174, Unknown=0, NotChecked=0, Total=15252 [2019-09-08 06:18:34,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-09-08 06:18:34,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2019-09-08 06:18:34,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-09-08 06:18:34,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 87 transitions. [2019-09-08 06:18:34,316 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 87 transitions. Word has length 149 [2019-09-08 06:18:34,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:18:34,316 INFO L475 AbstractCegarLoop]: Abstraction has 60 states and 87 transitions. [2019-09-08 06:18:34,316 INFO L476 AbstractCegarLoop]: Interpolant automaton has 97 states. [2019-09-08 06:18:34,317 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 87 transitions. [2019-09-08 06:18:34,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-09-08 06:18:34,318 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:18:34,318 INFO L399 BasicCegarLoop]: trace histogram [21, 21, 21, 19, 19, 19, 19, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:18:34,318 INFO L418 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:18:34,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:18:34,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1632850605, now seen corresponding path program 58 times [2019-09-08 06:18:34,319 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:18:34,319 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:18:34,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:18:34,321 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:18:34,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:18:34,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:18:37,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1392 backedges. 2 proven. 1178 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2019-09-08 06:18:37,702 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:18:37,702 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:18:37,719 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 06:18:37,782 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:18:37,783 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:18:37,788 WARN L254 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 253 conjunts are in the unsatisfiable core [2019-09-08 06:18:37,791 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:18:40,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1392 backedges. 11 proven. 630 refuted. 0 times theorem prover too weak. 751 trivial. 0 not checked. [2019-09-08 06:18:40,701 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:18:40,701 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 32] total 100 [2019-09-08 06:18:40,702 INFO L454 AbstractCegarLoop]: Interpolant automaton has 100 states [2019-09-08 06:18:40,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2019-09-08 06:18:40,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=9628, Unknown=0, NotChecked=0, Total=9900 [2019-09-08 06:18:40,703 INFO L87 Difference]: Start difference. First operand 60 states and 87 transitions. Second operand 100 states. [2019-09-08 06:18:47,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:18:47,346 INFO L93 Difference]: Finished difference Result 68 states and 93 transitions. [2019-09-08 06:18:47,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-09-08 06:18:47,347 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 156 [2019-09-08 06:18:47,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:18:47,348 INFO L225 Difference]: With dead ends: 68 [2019-09-08 06:18:47,348 INFO L226 Difference]: Without dead ends: 64 [2019-09-08 06:18:47,350 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1846 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=1114, Invalid=14888, Unknown=0, NotChecked=0, Total=16002 [2019-09-08 06:18:47,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-09-08 06:18:47,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2019-09-08 06:18:47,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-09-08 06:18:47,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 83 transitions. [2019-09-08 06:18:47,354 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 83 transitions. Word has length 156 [2019-09-08 06:18:47,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:18:47,355 INFO L475 AbstractCegarLoop]: Abstraction has 58 states and 83 transitions. [2019-09-08 06:18:47,355 INFO L476 AbstractCegarLoop]: Interpolant automaton has 100 states. [2019-09-08 06:18:47,355 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 83 transitions. [2019-09-08 06:18:47,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-09-08 06:18:47,355 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:18:47,356 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:18:47,356 INFO L418 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:18:47,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:18:47,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1678979596, now seen corresponding path program 59 times [2019-09-08 06:18:47,357 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:18:47,357 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:18:47,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:18:47,358 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:18:47,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:18:47,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:18:49,496 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 0 proven. 660 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2019-09-08 06:18:49,497 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:18:49,497 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:18:49,510 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 06:18:49,565 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-09-08 06:18:49,566 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:18:49,572 WARN L254 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 192 conjunts are in the unsatisfiable core [2019-09-08 06:18:49,574 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:18:51,875 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 32 proven. 368 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2019-09-08 06:18:51,881 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:18:51,882 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 32] total 84 [2019-09-08 06:18:51,882 INFO L454 AbstractCegarLoop]: Interpolant automaton has 84 states [2019-09-08 06:18:51,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2019-09-08 06:18:51,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=6701, Unknown=0, NotChecked=0, Total=6972 [2019-09-08 06:18:51,884 INFO L87 Difference]: Start difference. First operand 58 states and 83 transitions. Second operand 84 states. [2019-09-08 06:18:56,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:18:56,473 INFO L93 Difference]: Finished difference Result 70 states and 105 transitions. [2019-09-08 06:18:56,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-09-08 06:18:56,474 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 121 [2019-09-08 06:18:56,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:18:56,475 INFO L225 Difference]: With dead ends: 70 [2019-09-08 06:18:56,475 INFO L226 Difference]: Without dead ends: 64 [2019-09-08 06:18:56,477 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1532 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=836, Invalid=10506, Unknown=0, NotChecked=0, Total=11342 [2019-09-08 06:18:56,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-09-08 06:18:56,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2019-09-08 06:18:56,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-09-08 06:18:56,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 88 transitions. [2019-09-08 06:18:56,483 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 88 transitions. Word has length 121 [2019-09-08 06:18:56,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:18:56,483 INFO L475 AbstractCegarLoop]: Abstraction has 60 states and 88 transitions. [2019-09-08 06:18:56,484 INFO L476 AbstractCegarLoop]: Interpolant automaton has 84 states. [2019-09-08 06:18:56,484 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 88 transitions. [2019-09-08 06:18:56,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-09-08 06:18:56,485 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:18:56,485 INFO L399 BasicCegarLoop]: trace histogram [21, 21, 21, 19, 19, 19, 19, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:18:56,485 INFO L418 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:18:56,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:18:56,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1105035253, now seen corresponding path program 60 times [2019-09-08 06:18:56,486 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:18:56,486 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:18:56,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:18:56,487 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:18:56,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:18:56,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:18:59,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1392 backedges. 2 proven. 1178 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2019-09-08 06:18:59,816 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:18:59,816 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:18:59,828 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 06:18:59,895 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2019-09-08 06:18:59,895 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:18:59,900 WARN L254 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 253 conjunts are in the unsatisfiable core [2019-09-08 06:18:59,902 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:19:02,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1392 backedges. 10 proven. 628 refuted. 0 times theorem prover too weak. 754 trivial. 0 not checked. [2019-09-08 06:19:02,435 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:19:02,435 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 30] total 98 [2019-09-08 06:19:02,436 INFO L454 AbstractCegarLoop]: Interpolant automaton has 98 states [2019-09-08 06:19:02,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2019-09-08 06:19:02,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=9238, Unknown=0, NotChecked=0, Total=9506 [2019-09-08 06:19:02,437 INFO L87 Difference]: Start difference. First operand 60 states and 88 transitions. Second operand 98 states. [2019-09-08 06:19:07,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:19:07,818 INFO L93 Difference]: Finished difference Result 68 states and 94 transitions. [2019-09-08 06:19:07,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-09-08 06:19:07,819 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 156 [2019-09-08 06:19:07,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:19:07,820 INFO L225 Difference]: With dead ends: 68 [2019-09-08 06:19:07,820 INFO L226 Difference]: Without dead ends: 64 [2019-09-08 06:19:07,822 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1618 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=1046, Invalid=13960, Unknown=0, NotChecked=0, Total=15006 [2019-09-08 06:19:07,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-09-08 06:19:07,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2019-09-08 06:19:07,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-09-08 06:19:07,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 87 transitions. [2019-09-08 06:19:07,828 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 87 transitions. Word has length 156 [2019-09-08 06:19:07,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:19:07,828 INFO L475 AbstractCegarLoop]: Abstraction has 60 states and 87 transitions. [2019-09-08 06:19:07,829 INFO L476 AbstractCegarLoop]: Interpolant automaton has 98 states. [2019-09-08 06:19:07,829 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 87 transitions. [2019-09-08 06:19:07,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-09-08 06:19:07,830 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:19:07,830 INFO L399 BasicCegarLoop]: trace histogram [22, 22, 22, 20, 20, 20, 20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:19:07,830 INFO L418 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:19:07,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:19:07,831 INFO L82 PathProgramCache]: Analyzing trace with hash -480250090, now seen corresponding path program 61 times [2019-09-08 06:19:07,831 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:19:07,831 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:19:07,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:19:07,832 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:19:07,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:19:07,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:19:11,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1535 backedges. 2 proven. 1300 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2019-09-08 06:19:11,382 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:19:11,382 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 06:19:11,397 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:19:11,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:19:11,462 WARN L254 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 263 conjunts are in the unsatisfiable core [2019-09-08 06:19:11,464 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:19:14,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1535 backedges. 74 proven. 701 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2019-09-08 06:19:14,530 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:19:14,530 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 33] total 103 [2019-09-08 06:19:14,530 INFO L454 AbstractCegarLoop]: Interpolant automaton has 103 states [2019-09-08 06:19:14,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2019-09-08 06:19:14,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=10178, Unknown=0, NotChecked=0, Total=10506 [2019-09-08 06:19:14,532 INFO L87 Difference]: Start difference. First operand 60 states and 87 transitions. Second operand 103 states. [2019-09-08 06:19:20,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:19:20,193 INFO L93 Difference]: Finished difference Result 68 states and 93 transitions. [2019-09-08 06:19:20,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-09-08 06:19:20,193 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 163 [2019-09-08 06:19:20,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:19:20,195 INFO L225 Difference]: With dead ends: 68 [2019-09-08 06:19:20,195 INFO L226 Difference]: Without dead ends: 64 [2019-09-08 06:19:20,196 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1752 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=1092, Invalid=15164, Unknown=0, NotChecked=0, Total=16256 [2019-09-08 06:19:20,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-09-08 06:19:20,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2019-09-08 06:19:20,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-09-08 06:19:20,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 83 transitions. [2019-09-08 06:19:20,200 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 83 transitions. Word has length 163 [2019-09-08 06:19:20,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:19:20,201 INFO L475 AbstractCegarLoop]: Abstraction has 58 states and 83 transitions. [2019-09-08 06:19:20,201 INFO L476 AbstractCegarLoop]: Interpolant automaton has 103 states. [2019-09-08 06:19:20,201 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 83 transitions. [2019-09-08 06:19:20,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-09-08 06:19:20,202 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:19:20,202 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:19:20,202 INFO L418 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:19:20,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:19:20,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1986005677, now seen corresponding path program 62 times [2019-09-08 06:19:20,203 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:19:20,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:19:20,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:19:20,204 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:19:20,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:19:20,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:19:22,069 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 2 proven. 574 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-09-08 06:19:22,070 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:19:22,070 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:19:22,088 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:19:22,130 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:19:22,130 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:19:22,134 WARN L254 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 176 conjunts are in the unsatisfiable core [2019-09-08 06:19:22,136 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:19:24,641 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 85 proven. 311 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2019-09-08 06:19:24,645 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:19:24,646 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 38] total 85 [2019-09-08 06:19:24,646 INFO L454 AbstractCegarLoop]: Interpolant automaton has 85 states [2019-09-08 06:19:24,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2019-09-08 06:19:24,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=6880, Unknown=0, NotChecked=0, Total=7140 [2019-09-08 06:19:24,648 INFO L87 Difference]: Start difference. First operand 58 states and 83 transitions. Second operand 85 states. [2019-09-08 06:19:28,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:19:28,998 INFO L93 Difference]: Finished difference Result 71 states and 99 transitions. [2019-09-08 06:19:28,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-09-08 06:19:28,999 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 114 [2019-09-08 06:19:28,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:19:29,000 INFO L225 Difference]: With dead ends: 71 [2019-09-08 06:19:29,000 INFO L226 Difference]: Without dead ends: 67 [2019-09-08 06:19:29,002 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1957 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=876, Invalid=11556, Unknown=0, NotChecked=0, Total=12432 [2019-09-08 06:19:29,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-09-08 06:19:29,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2019-09-08 06:19:29,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-09-08 06:19:29,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 92 transitions. [2019-09-08 06:19:29,008 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 92 transitions. Word has length 114 [2019-09-08 06:19:29,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:19:29,009 INFO L475 AbstractCegarLoop]: Abstraction has 63 states and 92 transitions. [2019-09-08 06:19:29,009 INFO L476 AbstractCegarLoop]: Interpolant automaton has 85 states. [2019-09-08 06:19:29,009 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 92 transitions. [2019-09-08 06:19:29,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-09-08 06:19:29,010 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:19:29,010 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:19:29,010 INFO L418 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:19:29,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:19:29,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1967581334, now seen corresponding path program 63 times [2019-09-08 06:19:29,011 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:19:29,011 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:19:29,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:19:29,012 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:19:29,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:19:29,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:19:31,051 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 2 proven. 658 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2019-09-08 06:19:31,052 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:19:31,052 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:19:31,063 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 06:19:31,124 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-09-08 06:19:31,124 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:19:31,128 WARN L254 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 193 conjunts are in the unsatisfiable core [2019-09-08 06:19:31,132 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:19:33,507 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 12 proven. 367 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2019-09-08 06:19:33,512 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:19:33,512 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 34] total 87 [2019-09-08 06:19:33,513 INFO L454 AbstractCegarLoop]: Interpolant automaton has 87 states [2019-09-08 06:19:33,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2019-09-08 06:19:33,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=7251, Unknown=0, NotChecked=0, Total=7482 [2019-09-08 06:19:33,514 INFO L87 Difference]: Start difference. First operand 63 states and 92 transitions. Second operand 87 states. [2019-09-08 06:19:38,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:19:38,876 INFO L93 Difference]: Finished difference Result 73 states and 102 transitions. [2019-09-08 06:19:38,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-09-08 06:19:38,877 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 121 [2019-09-08 06:19:38,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:19:38,878 INFO L225 Difference]: With dead ends: 73 [2019-09-08 06:19:38,878 INFO L226 Difference]: Without dead ends: 69 [2019-09-08 06:19:38,880 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2070 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=992, Invalid=12348, Unknown=0, NotChecked=0, Total=13340 [2019-09-08 06:19:38,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-09-08 06:19:38,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2019-09-08 06:19:38,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-09-08 06:19:38,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 92 transitions. [2019-09-08 06:19:38,886 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 92 transitions. Word has length 121 [2019-09-08 06:19:38,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:19:38,886 INFO L475 AbstractCegarLoop]: Abstraction has 63 states and 92 transitions. [2019-09-08 06:19:38,886 INFO L476 AbstractCegarLoop]: Interpolant automaton has 87 states. [2019-09-08 06:19:38,886 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 92 transitions. [2019-09-08 06:19:38,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-09-08 06:19:38,887 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:19:38,887 INFO L399 BasicCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:19:38,888 INFO L418 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:19:38,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:19:38,888 INFO L82 PathProgramCache]: Analyzing trace with hash -691092041, now seen corresponding path program 64 times [2019-09-08 06:19:38,888 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:19:38,888 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:19:38,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:19:38,889 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:19:38,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:19:38,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:19:41,071 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 2 proven. 750 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2019-09-08 06:19:41,071 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:19:41,071 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:19:41,082 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 06:19:41,126 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:19:41,126 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:19:41,130 WARN L254 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 205 conjunts are in the unsatisfiable core [2019-09-08 06:19:41,132 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:19:43,624 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 12 proven. 414 refuted. 0 times theorem prover too weak. 464 trivial. 0 not checked. [2019-09-08 06:19:43,629 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:19:43,629 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 34] total 90 [2019-09-08 06:19:43,630 INFO L454 AbstractCegarLoop]: Interpolant automaton has 90 states [2019-09-08 06:19:43,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2019-09-08 06:19:43,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=7770, Unknown=0, NotChecked=0, Total=8010 [2019-09-08 06:19:43,631 INFO L87 Difference]: Start difference. First operand 63 states and 92 transitions. Second operand 90 states. [2019-09-08 06:19:49,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:19:49,280 INFO L93 Difference]: Finished difference Result 73 states and 102 transitions. [2019-09-08 06:19:49,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-09-08 06:19:49,280 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 128 [2019-09-08 06:19:49,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:19:49,282 INFO L225 Difference]: With dead ends: 73 [2019-09-08 06:19:49,282 INFO L226 Difference]: Without dead ends: 69 [2019-09-08 06:19:49,283 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2074 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1030, Invalid=13012, Unknown=0, NotChecked=0, Total=14042 [2019-09-08 06:19:49,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-09-08 06:19:49,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2019-09-08 06:19:49,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-09-08 06:19:49,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 92 transitions. [2019-09-08 06:19:49,289 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 92 transitions. Word has length 128 [2019-09-08 06:19:49,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:19:49,289 INFO L475 AbstractCegarLoop]: Abstraction has 63 states and 92 transitions. [2019-09-08 06:19:49,289 INFO L476 AbstractCegarLoop]: Interpolant automaton has 90 states. [2019-09-08 06:19:49,290 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 92 transitions. [2019-09-08 06:19:49,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-09-08 06:19:49,290 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:19:49,291 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 18, 16, 16, 16, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:19:49,291 INFO L418 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:19:49,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:19:49,291 INFO L82 PathProgramCache]: Analyzing trace with hash 2129380876, now seen corresponding path program 65 times [2019-09-08 06:19:49,291 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:19:49,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:19:49,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:19:49,292 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:19:49,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:19:49,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:19:51,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 3 proven. 847 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-09-08 06:19:51,722 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:19:51,722 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:19:51,733 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 06:19:51,803 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2019-09-08 06:19:51,803 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:19:51,808 WARN L254 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 216 conjunts are in the unsatisfiable core [2019-09-08 06:19:51,810 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:19:54,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 43 proven. 467 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2019-09-08 06:19:54,886 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:19:54,887 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 38] total 96 [2019-09-08 06:19:54,887 INFO L454 AbstractCegarLoop]: Interpolant automaton has 96 states [2019-09-08 06:19:54,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2019-09-08 06:19:54,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=8813, Unknown=0, NotChecked=0, Total=9120 [2019-09-08 06:19:54,888 INFO L87 Difference]: Start difference. First operand 63 states and 92 transitions. Second operand 96 states. [2019-09-08 06:19:59,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:19:59,546 INFO L93 Difference]: Finished difference Result 73 states and 102 transitions. [2019-09-08 06:19:59,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-09-08 06:19:59,547 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 135 [2019-09-08 06:19:59,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:19:59,548 INFO L225 Difference]: With dead ends: 73 [2019-09-08 06:19:59,548 INFO L226 Difference]: Without dead ends: 69 [2019-09-08 06:19:59,550 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2256 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1076, Invalid=13930, Unknown=0, NotChecked=0, Total=15006 [2019-09-08 06:19:59,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-09-08 06:19:59,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2019-09-08 06:19:59,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-09-08 06:19:59,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 92 transitions. [2019-09-08 06:19:59,556 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 92 transitions. Word has length 135 [2019-09-08 06:19:59,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:19:59,556 INFO L475 AbstractCegarLoop]: Abstraction has 63 states and 92 transitions. [2019-09-08 06:19:59,556 INFO L476 AbstractCegarLoop]: Interpolant automaton has 96 states. [2019-09-08 06:19:59,556 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 92 transitions. [2019-09-08 06:19:59,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-09-08 06:19:59,557 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:19:59,558 INFO L399 BasicCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:19:59,558 INFO L418 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:19:59,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:19:59,558 INFO L82 PathProgramCache]: Analyzing trace with hash -330717247, now seen corresponding path program 66 times [2019-09-08 06:19:59,558 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:19:59,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:19:59,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:19:59,559 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:19:59,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:19:59,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:20:02,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 2 proven. 952 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2019-09-08 06:20:02,248 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:20:02,248 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:20:02,269 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 06:20:02,343 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2019-09-08 06:20:02,343 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:20:02,349 WARN L254 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 229 conjunts are in the unsatisfiable core [2019-09-08 06:20:02,351 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:20:05,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 12 proven. 517 refuted. 0 times theorem prover too weak. 598 trivial. 0 not checked. [2019-09-08 06:20:05,086 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:20:05,087 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 34] total 96 [2019-09-08 06:20:05,087 INFO L454 AbstractCegarLoop]: Interpolant automaton has 96 states [2019-09-08 06:20:05,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2019-09-08 06:20:05,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=8862, Unknown=0, NotChecked=0, Total=9120 [2019-09-08 06:20:05,088 INFO L87 Difference]: Start difference. First operand 63 states and 92 transitions. Second operand 96 states. [2019-09-08 06:20:10,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:20:10,472 INFO L93 Difference]: Finished difference Result 73 states and 102 transitions. [2019-09-08 06:20:10,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-09-08 06:20:10,473 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 142 [2019-09-08 06:20:10,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:20:10,474 INFO L225 Difference]: With dead ends: 73 [2019-09-08 06:20:10,475 INFO L226 Difference]: Without dead ends: 69 [2019-09-08 06:20:10,476 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2082 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1106, Invalid=14394, Unknown=0, NotChecked=0, Total=15500 [2019-09-08 06:20:10,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-09-08 06:20:10,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2019-09-08 06:20:10,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-09-08 06:20:10,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 92 transitions. [2019-09-08 06:20:10,480 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 92 transitions. Word has length 142 [2019-09-08 06:20:10,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:20:10,480 INFO L475 AbstractCegarLoop]: Abstraction has 63 states and 92 transitions. [2019-09-08 06:20:10,480 INFO L476 AbstractCegarLoop]: Interpolant automaton has 96 states. [2019-09-08 06:20:10,481 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 92 transitions. [2019-09-08 06:20:10,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-09-08 06:20:10,481 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:20:10,481 INFO L399 BasicCegarLoop]: trace histogram [20, 20, 20, 18, 18, 18, 18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:20:10,482 INFO L418 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:20:10,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:20:10,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1329712258, now seen corresponding path program 67 times [2019-09-08 06:20:10,482 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:20:10,482 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:20:10,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:20:10,483 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:20:10,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:20:10,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:20:13,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 3 proven. 1055 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2019-09-08 06:20:13,204 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:20:13,204 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:20:13,217 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:20:13,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:20:13,288 WARN L254 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 239 conjunts are in the unsatisfiable core [2019-09-08 06:20:13,290 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:20:16,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 66 proven. 583 refuted. 0 times theorem prover too weak. 607 trivial. 0 not checked. [2019-09-08 06:20:16,221 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:20:16,221 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 35] total 97 [2019-09-08 06:20:16,222 INFO L454 AbstractCegarLoop]: Interpolant automaton has 97 states [2019-09-08 06:20:16,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2019-09-08 06:20:16,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=9010, Unknown=0, NotChecked=0, Total=9312 [2019-09-08 06:20:16,223 INFO L87 Difference]: Start difference. First operand 63 states and 92 transitions. Second operand 97 states. [2019-09-08 06:20:20,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:20:20,948 INFO L93 Difference]: Finished difference Result 73 states and 102 transitions. [2019-09-08 06:20:20,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-09-08 06:20:20,949 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 149 [2019-09-08 06:20:20,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:20:20,950 INFO L225 Difference]: With dead ends: 73 [2019-09-08 06:20:20,950 INFO L226 Difference]: Without dead ends: 69 [2019-09-08 06:20:20,951 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2043 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1024, Invalid=14228, Unknown=0, NotChecked=0, Total=15252 [2019-09-08 06:20:20,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-09-08 06:20:20,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2019-09-08 06:20:20,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-09-08 06:20:20,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 92 transitions. [2019-09-08 06:20:20,957 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 92 transitions. Word has length 149 [2019-09-08 06:20:20,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:20:20,957 INFO L475 AbstractCegarLoop]: Abstraction has 63 states and 92 transitions. [2019-09-08 06:20:20,957 INFO L476 AbstractCegarLoop]: Interpolant automaton has 97 states. [2019-09-08 06:20:20,957 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 92 transitions. [2019-09-08 06:20:20,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-09-08 06:20:20,958 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:20:20,958 INFO L399 BasicCegarLoop]: trace histogram [21, 21, 21, 19, 19, 19, 19, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:20:20,959 INFO L418 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:20:20,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:20:20,959 INFO L82 PathProgramCache]: Analyzing trace with hash -416411445, now seen corresponding path program 68 times [2019-09-08 06:20:20,959 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:20:20,959 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:20:20,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:20:20,960 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:20:20,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:20:21,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:20:24,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1392 backedges. 2 proven. 1178 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2019-09-08 06:20:24,657 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:20:24,657 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:20:24,668 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:20:24,739 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:20:24,739 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:20:24,744 WARN L254 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 251 conjunts are in the unsatisfiable core [2019-09-08 06:20:24,746 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:20:27,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1392 backedges. 70 proven. 642 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (70)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 06:20:27,916 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:20:27,916 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 35] total 102 [2019-09-08 06:20:27,917 INFO L454 AbstractCegarLoop]: Interpolant automaton has 102 states [2019-09-08 06:20:27,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2019-09-08 06:20:27,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=9981, Unknown=0, NotChecked=0, Total=10302 [2019-09-08 06:20:27,918 INFO L87 Difference]: Start difference. First operand 63 states and 92 transitions. Second operand 102 states. [2019-09-08 06:20:34,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:20:34,233 INFO L93 Difference]: Finished difference Result 73 states and 102 transitions. [2019-09-08 06:20:34,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-09-08 06:20:34,234 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 156 [2019-09-08 06:20:34,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:20:34,235 INFO L225 Difference]: With dead ends: 73 [2019-09-08 06:20:34,235 INFO L226 Difference]: Without dead ends: 69 [2019-09-08 06:20:34,237 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1986 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=1120, Invalid=15392, Unknown=0, NotChecked=0, Total=16512 [2019-09-08 06:20:34,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-09-08 06:20:34,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2019-09-08 06:20:34,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-09-08 06:20:34,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 92 transitions. [2019-09-08 06:20:34,242 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 92 transitions. Word has length 156 [2019-09-08 06:20:34,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:20:34,242 INFO L475 AbstractCegarLoop]: Abstraction has 63 states and 92 transitions. [2019-09-08 06:20:34,242 INFO L476 AbstractCegarLoop]: Interpolant automaton has 102 states. [2019-09-08 06:20:34,243 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 92 transitions. [2019-09-08 06:20:34,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-09-08 06:20:34,243 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:20:34,244 INFO L399 BasicCegarLoop]: trace histogram [22, 22, 22, 20, 20, 20, 20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:20:34,244 INFO L418 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:20:34,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:20:34,244 INFO L82 PathProgramCache]: Analyzing trace with hash 905681912, now seen corresponding path program 69 times [2019-09-08 06:20:34,244 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:20:34,244 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:20:34,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:20:34,245 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:20:34,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:20:34,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:20:37,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1535 backedges. 2 proven. 1294 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2019-09-08 06:20:37,526 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:20:37,526 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:20:37,537 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 06:20:37,612 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2019-09-08 06:20:37,613 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:20:37,618 WARN L254 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 265 conjunts are in the unsatisfiable core [2019-09-08 06:20:37,621 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:20:40,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1535 backedges. 12 proven. 694 refuted. 0 times theorem prover too weak. 829 trivial. 0 not checked. [2019-09-08 06:20:40,592 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:20:40,592 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 34] total 103 [2019-09-08 06:20:40,593 INFO L454 AbstractCegarLoop]: Interpolant automaton has 103 states [2019-09-08 06:20:40,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2019-09-08 06:20:40,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=10227, Unknown=0, NotChecked=0, Total=10506 [2019-09-08 06:20:40,594 INFO L87 Difference]: Start difference. First operand 63 states and 92 transitions. Second operand 103 states. [2019-09-08 06:20:47,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:20:47,212 INFO L93 Difference]: Finished difference Result 73 states and 102 transitions. [2019-09-08 06:20:47,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-09-08 06:20:47,213 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 163 [2019-09-08 06:20:47,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:20:47,214 INFO L225 Difference]: With dead ends: 73 [2019-09-08 06:20:47,214 INFO L226 Difference]: Without dead ends: 69 [2019-09-08 06:20:47,215 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2090 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=1160, Invalid=16132, Unknown=0, NotChecked=0, Total=17292 [2019-09-08 06:20:47,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-09-08 06:20:47,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2019-09-08 06:20:47,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-09-08 06:20:47,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 92 transitions. [2019-09-08 06:20:47,220 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 92 transitions. Word has length 163 [2019-09-08 06:20:47,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:20:47,220 INFO L475 AbstractCegarLoop]: Abstraction has 63 states and 92 transitions. [2019-09-08 06:20:47,221 INFO L476 AbstractCegarLoop]: Interpolant automaton has 103 states. [2019-09-08 06:20:47,221 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 92 transitions. [2019-09-08 06:20:47,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-09-08 06:20:47,221 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:20:47,222 INFO L399 BasicCegarLoop]: trace histogram [23, 23, 23, 21, 21, 21, 21, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:20:47,222 INFO L418 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:20:47,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:20:47,222 INFO L82 PathProgramCache]: Analyzing trace with hash 674848981, now seen corresponding path program 70 times [2019-09-08 06:20:47,222 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:20:47,223 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:20:47,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:20:47,223 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:20:47,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:20:47,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:20:50,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1685 backedges. 2 proven. 1422 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2019-09-08 06:20:50,938 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:20:50,938 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:20:50,949 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 06:20:51,009 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:20:51,009 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:20:51,014 WARN L254 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 277 conjunts are in the unsatisfiable core [2019-09-08 06:20:51,016 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:20:54,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1685 backedges. 12 proven. 759 refuted. 0 times theorem prover too weak. 914 trivial. 0 not checked. [2019-09-08 06:20:54,180 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:20:54,180 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 34] total 106 [2019-09-08 06:20:54,181 INFO L454 AbstractCegarLoop]: Interpolant automaton has 106 states [2019-09-08 06:20:54,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2019-09-08 06:20:54,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=10842, Unknown=0, NotChecked=0, Total=11130 [2019-09-08 06:20:54,182 INFO L87 Difference]: Start difference. First operand 63 states and 92 transitions. Second operand 106 states. [2019-09-08 06:21:00,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:21:00,698 INFO L93 Difference]: Finished difference Result 71 states and 98 transitions. [2019-09-08 06:21:00,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-09-08 06:21:00,699 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 170 [2019-09-08 06:21:00,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:21:00,700 INFO L225 Difference]: With dead ends: 71 [2019-09-08 06:21:00,700 INFO L226 Difference]: Without dead ends: 67 [2019-09-08 06:21:00,702 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2094 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=1198, Invalid=16892, Unknown=0, NotChecked=0, Total=18090 [2019-09-08 06:21:00,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-09-08 06:21:00,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2019-09-08 06:21:00,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-09-08 06:21:00,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 88 transitions. [2019-09-08 06:21:00,707 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 88 transitions. Word has length 170 [2019-09-08 06:21:00,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:21:00,708 INFO L475 AbstractCegarLoop]: Abstraction has 61 states and 88 transitions. [2019-09-08 06:21:00,708 INFO L476 AbstractCegarLoop]: Interpolant automaton has 106 states. [2019-09-08 06:21:00,708 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 88 transitions. [2019-09-08 06:21:00,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-09-08 06:21:00,709 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:21:00,709 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:21:00,709 INFO L418 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:21:00,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:21:00,709 INFO L82 PathProgramCache]: Analyzing trace with hash 2100935238, now seen corresponding path program 71 times [2019-09-08 06:21:00,709 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:21:00,709 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:21:00,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:21:00,710 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:21:00,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:21:00,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:21:02,801 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 0 proven. 660 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2019-09-08 06:21:02,801 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:21:02,801 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:21:02,814 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 06:21:02,864 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-09-08 06:21:02,865 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:21:02,871 WARN L254 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 192 conjunts are in the unsatisfiable core [2019-09-08 06:21:02,873 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:21:05,221 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 31 proven. 372 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2019-09-08 06:21:05,227 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:21:05,228 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 34] total 86 [2019-09-08 06:21:05,228 INFO L454 AbstractCegarLoop]: Interpolant automaton has 86 states [2019-09-08 06:21:05,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2019-09-08 06:21:05,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=7035, Unknown=0, NotChecked=0, Total=7310 [2019-09-08 06:21:05,229 INFO L87 Difference]: Start difference. First operand 61 states and 88 transitions. Second operand 86 states. [2019-09-08 06:21:12,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:21:12,153 INFO L93 Difference]: Finished difference Result 73 states and 111 transitions. [2019-09-08 06:21:12,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-09-08 06:21:12,154 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 121 [2019-09-08 06:21:12,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:21:12,155 INFO L225 Difference]: With dead ends: 73 [2019-09-08 06:21:12,156 INFO L226 Difference]: Without dead ends: 67 [2019-09-08 06:21:12,157 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=894, Invalid=11316, Unknown=0, NotChecked=0, Total=12210 [2019-09-08 06:21:12,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-09-08 06:21:12,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2019-09-08 06:21:12,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-09-08 06:21:12,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 93 transitions. [2019-09-08 06:21:12,162 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 93 transitions. Word has length 121 [2019-09-08 06:21:12,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:21:12,163 INFO L475 AbstractCegarLoop]: Abstraction has 63 states and 93 transitions. [2019-09-08 06:21:12,163 INFO L476 AbstractCegarLoop]: Interpolant automaton has 86 states. [2019-09-08 06:21:12,163 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 93 transitions. [2019-09-08 06:21:12,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-09-08 06:21:12,164 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:21:12,164 INFO L399 BasicCegarLoop]: trace histogram [24, 24, 24, 22, 22, 22, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:21:12,164 INFO L418 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:21:12,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:21:12,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1366021230, now seen corresponding path program 72 times [2019-09-08 06:21:12,165 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:21:12,165 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:21:12,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:21:12,166 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:21:12,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:21:12,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:21:16,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1842 backedges. 2 proven. 1559 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2019-09-08 06:21:16,142 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:21:16,142 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:21:16,156 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 06:21:16,240 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2019-09-08 06:21:16,241 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:21:16,247 WARN L254 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 289 conjunts are in the unsatisfiable core [2019-09-08 06:21:16,250 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:21:22,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1842 backedges. 12 proven. 827 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2019-09-08 06:21:22,073 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:21:22,073 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 34] total 110 [2019-09-08 06:21:22,074 INFO L454 AbstractCegarLoop]: Interpolant automaton has 110 states [2019-09-08 06:21:22,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2019-09-08 06:21:22,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=11690, Unknown=0, NotChecked=0, Total=11990 [2019-09-08 06:21:22,075 INFO L87 Difference]: Start difference. First operand 63 states and 93 transitions. Second operand 110 states. [2019-09-08 06:21:29,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:21:29,048 INFO L93 Difference]: Finished difference Result 73 states and 101 transitions. [2019-09-08 06:21:29,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-09-08 06:21:29,048 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 177 [2019-09-08 06:21:29,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:21:29,050 INFO L225 Difference]: With dead ends: 73 [2019-09-08 06:21:29,050 INFO L226 Difference]: Without dead ends: 67 [2019-09-08 06:21:29,051 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2230 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=1278, Invalid=18462, Unknown=0, NotChecked=0, Total=19740 [2019-09-08 06:21:29,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-09-08 06:21:29,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2019-09-08 06:21:29,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-09-08 06:21:29,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 88 transitions. [2019-09-08 06:21:29,057 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 88 transitions. Word has length 177 [2019-09-08 06:21:29,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:21:29,057 INFO L475 AbstractCegarLoop]: Abstraction has 61 states and 88 transitions. [2019-09-08 06:21:29,057 INFO L476 AbstractCegarLoop]: Interpolant automaton has 110 states. [2019-09-08 06:21:29,058 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 88 transitions. [2019-09-08 06:21:29,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-09-08 06:21:29,058 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:21:29,059 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:21:29,059 INFO L418 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:21:29,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:21:29,059 INFO L82 PathProgramCache]: Analyzing trace with hash 269470196, now seen corresponding path program 73 times [2019-09-08 06:21:29,059 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:21:29,059 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:21:29,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:21:29,060 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:21:29,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:21:29,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:21:30,789 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 2 proven. 660 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2019-09-08 06:21:30,790 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:21:30,790 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:21:30,802 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:21:30,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:21:30,850 WARN L254 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 188 conjunts are in the unsatisfiable core [2019-09-08 06:21:30,852 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:21:33,671 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 92 proven. 356 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2019-09-08 06:21:33,676 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:21:33,676 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 40] total 90 [2019-09-08 06:21:33,676 INFO L454 AbstractCegarLoop]: Interpolant automaton has 90 states [2019-09-08 06:21:33,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2019-09-08 06:21:33,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=7735, Unknown=0, NotChecked=0, Total=8010 [2019-09-08 06:21:33,678 INFO L87 Difference]: Start difference. First operand 61 states and 88 transitions. Second operand 90 states. [2019-09-08 06:21:39,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:21:39,001 INFO L93 Difference]: Finished difference Result 74 states and 104 transitions. [2019-09-08 06:21:39,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-09-08 06:21:39,001 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 121 [2019-09-08 06:21:39,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:21:39,002 INFO L225 Difference]: With dead ends: 74 [2019-09-08 06:21:39,003 INFO L226 Difference]: Without dead ends: 70 [2019-09-08 06:21:39,004 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2214 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=966, Invalid=13076, Unknown=0, NotChecked=0, Total=14042 [2019-09-08 06:21:39,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-09-08 06:21:39,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2019-09-08 06:21:39,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-09-08 06:21:39,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 97 transitions. [2019-09-08 06:21:39,010 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 97 transitions. Word has length 121 [2019-09-08 06:21:39,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:21:39,010 INFO L475 AbstractCegarLoop]: Abstraction has 66 states and 97 transitions. [2019-09-08 06:21:39,010 INFO L476 AbstractCegarLoop]: Interpolant automaton has 90 states. [2019-09-08 06:21:39,011 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 97 transitions. [2019-09-08 06:21:39,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-09-08 06:21:39,012 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:21:39,012 INFO L399 BasicCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:21:39,012 INFO L418 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:21:39,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:21:39,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1843911701, now seen corresponding path program 74 times [2019-09-08 06:21:39,012 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:21:39,013 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:21:39,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:21:39,013 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:21:39,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:21:39,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:21:41,214 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 2 proven. 750 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2019-09-08 06:21:41,214 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:21:41,214 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:21:41,225 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:21:41,273 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:21:41,273 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:21:41,277 WARN L254 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 203 conjunts are in the unsatisfiable core [2019-09-08 06:21:41,279 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:21:44,188 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 54 proven. 427 refuted. 0 times theorem prover too weak. 409 trivial. 0 not checked. [2019-09-08 06:21:44,193 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:21:44,193 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 37] total 92 [2019-09-08 06:21:44,194 INFO L454 AbstractCegarLoop]: Interpolant automaton has 92 states [2019-09-08 06:21:44,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2019-09-08 06:21:44,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=8091, Unknown=0, NotChecked=0, Total=8372 [2019-09-08 06:21:44,195 INFO L87 Difference]: Start difference. First operand 66 states and 97 transitions. Second operand 92 states. [2019-09-08 06:21:50,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:21:50,222 INFO L93 Difference]: Finished difference Result 76 states and 107 transitions. [2019-09-08 06:21:50,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-09-08 06:21:50,222 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 128 [2019-09-08 06:21:50,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:21:50,224 INFO L225 Difference]: With dead ends: 76 [2019-09-08 06:21:50,224 INFO L226 Difference]: Without dead ends: 72 [2019-09-08 06:21:50,226 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2224 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=1024, Invalid=13496, Unknown=0, NotChecked=0, Total=14520 [2019-09-08 06:21:50,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-09-08 06:21:50,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2019-09-08 06:21:50,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-09-08 06:21:50,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 97 transitions. [2019-09-08 06:21:50,232 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 97 transitions. Word has length 128 [2019-09-08 06:21:50,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:21:50,232 INFO L475 AbstractCegarLoop]: Abstraction has 66 states and 97 transitions. [2019-09-08 06:21:50,232 INFO L476 AbstractCegarLoop]: Interpolant automaton has 92 states. [2019-09-08 06:21:50,233 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 97 transitions. [2019-09-08 06:21:50,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-09-08 06:21:50,233 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:21:50,234 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 18, 16, 16, 16, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:21:50,234 INFO L418 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:21:50,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:21:50,234 INFO L82 PathProgramCache]: Analyzing trace with hash -2106298454, now seen corresponding path program 75 times [2019-09-08 06:21:50,234 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:21:50,235 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:21:50,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:21:50,236 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:21:50,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:21:50,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:21:52,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 2 proven. 848 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-09-08 06:21:52,712 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:21:52,712 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:21:52,724 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 06:21:52,787 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2019-09-08 06:21:52,787 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:21:52,792 WARN L254 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 217 conjunts are in the unsatisfiable core [2019-09-08 06:21:52,795 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:21:55,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 13 proven. 466 refuted. 0 times theorem prover too weak. 526 trivial. 0 not checked. [2019-09-08 06:21:55,606 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:21:55,606 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 36] total 95 [2019-09-08 06:21:55,607 INFO L454 AbstractCegarLoop]: Interpolant automaton has 95 states [2019-09-08 06:21:55,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2019-09-08 06:21:55,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=8677, Unknown=0, NotChecked=0, Total=8930 [2019-09-08 06:21:55,608 INFO L87 Difference]: Start difference. First operand 66 states and 97 transitions. Second operand 95 states. [2019-09-08 06:22:01,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:22:01,394 INFO L93 Difference]: Finished difference Result 76 states and 107 transitions. [2019-09-08 06:22:01,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-09-08 06:22:01,395 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 135 [2019-09-08 06:22:01,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:22:01,396 INFO L225 Difference]: With dead ends: 76 [2019-09-08 06:22:01,396 INFO L226 Difference]: Without dead ends: 72 [2019-09-08 06:22:01,398 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2338 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1130, Invalid=14620, Unknown=0, NotChecked=0, Total=15750 [2019-09-08 06:22:01,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-09-08 06:22:01,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2019-09-08 06:22:01,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-09-08 06:22:01,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 97 transitions. [2019-09-08 06:22:01,407 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 97 transitions. Word has length 135 [2019-09-08 06:22:01,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:22:01,407 INFO L475 AbstractCegarLoop]: Abstraction has 66 states and 97 transitions. [2019-09-08 06:22:01,408 INFO L476 AbstractCegarLoop]: Interpolant automaton has 95 states. [2019-09-08 06:22:01,408 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 97 transitions. [2019-09-08 06:22:01,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-09-08 06:22:01,409 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:22:01,409 INFO L399 BasicCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:22:01,409 INFO L418 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:22:01,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:22:01,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1836799413, now seen corresponding path program 76 times [2019-09-08 06:22:01,410 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:22:01,410 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:22:01,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:22:01,411 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:22:01,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:22:01,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:22:04,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 2 proven. 952 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2019-09-08 06:22:04,077 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:22:04,077 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:22:04,089 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 06:22:04,138 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:22:04,139 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:22:04,142 WARN L254 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 229 conjunts are in the unsatisfiable core [2019-09-08 06:22:04,145 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:22:07,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 13 proven. 519 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2019-09-08 06:22:07,066 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:22:07,066 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 36] total 98 [2019-09-08 06:22:07,066 INFO L454 AbstractCegarLoop]: Interpolant automaton has 98 states [2019-09-08 06:22:07,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2019-09-08 06:22:07,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=9244, Unknown=0, NotChecked=0, Total=9506 [2019-09-08 06:22:07,068 INFO L87 Difference]: Start difference. First operand 66 states and 97 transitions. Second operand 98 states. [2019-09-08 06:22:13,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:22:13,074 INFO L93 Difference]: Finished difference Result 76 states and 107 transitions. [2019-09-08 06:22:13,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-09-08 06:22:13,074 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 142 [2019-09-08 06:22:13,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:22:13,076 INFO L225 Difference]: With dead ends: 76 [2019-09-08 06:22:13,076 INFO L226 Difference]: Without dead ends: 72 [2019-09-08 06:22:13,077 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2342 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=1170, Invalid=15342, Unknown=0, NotChecked=0, Total=16512 [2019-09-08 06:22:13,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-09-08 06:22:13,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2019-09-08 06:22:13,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-09-08 06:22:13,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 97 transitions. [2019-09-08 06:22:13,083 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 97 transitions. Word has length 142 [2019-09-08 06:22:13,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:22:13,083 INFO L475 AbstractCegarLoop]: Abstraction has 66 states and 97 transitions. [2019-09-08 06:22:13,083 INFO L476 AbstractCegarLoop]: Interpolant automaton has 98 states. [2019-09-08 06:22:13,083 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 97 transitions. [2019-09-08 06:22:13,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-09-08 06:22:13,084 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:22:13,084 INFO L399 BasicCegarLoop]: trace histogram [20, 20, 20, 18, 18, 18, 18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:22:13,085 INFO L418 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:22:13,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:22:13,085 INFO L82 PathProgramCache]: Analyzing trace with hash 136515168, now seen corresponding path program 77 times [2019-09-08 06:22:13,085 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:22:13,085 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:22:13,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:22:13,086 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:22:13,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:22:13,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:22:15,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 2 proven. 1062 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2019-09-08 06:22:15,979 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:22:15,979 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:22:15,991 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 06:22:16,063 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-09-08 06:22:16,063 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:22:16,069 WARN L254 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 240 conjunts are in the unsatisfiable core [2019-09-08 06:22:16,071 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:22:19,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 48 proven. 578 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2019-09-08 06:22:19,641 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:22:19,641 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 40] total 104 [2019-09-08 06:22:19,641 INFO L454 AbstractCegarLoop]: Interpolant automaton has 104 states [2019-09-08 06:22:19,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2019-09-08 06:22:19,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=10381, Unknown=0, NotChecked=0, Total=10712 [2019-09-08 06:22:19,642 INFO L87 Difference]: Start difference. First operand 66 states and 97 transitions. Second operand 104 states. [2019-09-08 06:22:26,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:22:26,429 INFO L93 Difference]: Finished difference Result 76 states and 107 transitions. [2019-09-08 06:22:26,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-09-08 06:22:26,429 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 149 [2019-09-08 06:22:26,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:22:26,430 INFO L225 Difference]: With dead ends: 76 [2019-09-08 06:22:26,431 INFO L226 Difference]: Without dead ends: 72 [2019-09-08 06:22:26,432 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2461 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=1216, Invalid=16340, Unknown=0, NotChecked=0, Total=17556 [2019-09-08 06:22:26,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-09-08 06:22:26,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2019-09-08 06:22:26,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-09-08 06:22:26,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 97 transitions. [2019-09-08 06:22:26,437 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 97 transitions. Word has length 149 [2019-09-08 06:22:26,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:22:26,438 INFO L475 AbstractCegarLoop]: Abstraction has 66 states and 97 transitions. [2019-09-08 06:22:26,438 INFO L476 AbstractCegarLoop]: Interpolant automaton has 104 states. [2019-09-08 06:22:26,438 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 97 transitions. [2019-09-08 06:22:26,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-09-08 06:22:26,439 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:22:26,439 INFO L399 BasicCegarLoop]: trace histogram [21, 21, 21, 19, 19, 19, 19, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:22:26,439 INFO L418 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:22:26,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:22:26,439 INFO L82 PathProgramCache]: Analyzing trace with hash -650297729, now seen corresponding path program 78 times [2019-09-08 06:22:26,440 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:22:26,440 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:22:26,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:22:26,440 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:22:26,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:22:26,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:22:29,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1392 backedges. 2 proven. 1178 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2019-09-08 06:22:29,618 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:22:29,619 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:22:29,631 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 06:22:29,703 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-09-08 06:22:29,703 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:22:29,709 WARN L254 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 253 conjunts are in the unsatisfiable core [2019-09-08 06:22:29,711 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:22:32,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1392 backedges. 13 proven. 634 refuted. 0 times theorem prover too weak. 745 trivial. 0 not checked. [2019-09-08 06:22:32,870 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:22:32,870 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 36] total 104 [2019-09-08 06:22:32,871 INFO L454 AbstractCegarLoop]: Interpolant automaton has 104 states [2019-09-08 06:22:32,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2019-09-08 06:22:32,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=10432, Unknown=0, NotChecked=0, Total=10712 [2019-09-08 06:22:32,872 INFO L87 Difference]: Start difference. First operand 66 states and 97 transitions. Second operand 104 states. [2019-09-08 06:22:40,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:22:40,505 INFO L93 Difference]: Finished difference Result 76 states and 107 transitions. [2019-09-08 06:22:40,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-09-08 06:22:40,506 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 156 [2019-09-08 06:22:40,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:22:40,507 INFO L225 Difference]: With dead ends: 76 [2019-09-08 06:22:40,507 INFO L226 Difference]: Without dead ends: 72 [2019-09-08 06:22:40,509 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2350 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=1250, Invalid=16840, Unknown=0, NotChecked=0, Total=18090 [2019-09-08 06:22:40,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-09-08 06:22:40,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2019-09-08 06:22:40,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-09-08 06:22:40,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 97 transitions. [2019-09-08 06:22:40,513 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 97 transitions. Word has length 156 [2019-09-08 06:22:40,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:22:40,513 INFO L475 AbstractCegarLoop]: Abstraction has 66 states and 97 transitions. [2019-09-08 06:22:40,513 INFO L476 AbstractCegarLoop]: Interpolant automaton has 104 states. [2019-09-08 06:22:40,514 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 97 transitions. [2019-09-08 06:22:40,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-09-08 06:22:40,514 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:22:40,515 INFO L399 BasicCegarLoop]: trace histogram [22, 22, 22, 20, 20, 20, 20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:22:40,515 INFO L418 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:22:40,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:22:40,515 INFO L82 PathProgramCache]: Analyzing trace with hash 787629590, now seen corresponding path program 79 times [2019-09-08 06:22:40,515 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:22:40,515 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:22:40,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:22:40,516 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:22:40,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:22:40,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:22:44,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1535 backedges. 2 proven. 1300 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2019-09-08 06:22:44,017 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:22:44,017 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:22:44,029 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:22:44,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:22:44,097 WARN L254 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 263 conjunts are in the unsatisfiable core [2019-09-08 06:22:44,100 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:22:49,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1535 backedges. 74 proven. 707 refuted. 0 times theorem prover too weak. 754 trivial. 0 not checked. [2019-09-08 06:22:49,676 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:22:49,676 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 37] total 107 [2019-09-08 06:22:49,677 INFO L454 AbstractCegarLoop]: Interpolant automaton has 107 states [2019-09-08 06:22:49,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2019-09-08 06:22:49,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=11006, Unknown=0, NotChecked=0, Total=11342 [2019-09-08 06:22:49,678 INFO L87 Difference]: Start difference. First operand 66 states and 97 transitions. Second operand 107 states. [2019-09-08 06:22:55,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:22:55,821 INFO L93 Difference]: Finished difference Result 76 states and 107 transitions. [2019-09-08 06:22:55,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-09-08 06:22:55,822 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 163 [2019-09-08 06:22:55,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:22:55,823 INFO L225 Difference]: With dead ends: 76 [2019-09-08 06:22:55,823 INFO L226 Difference]: Without dead ends: 72 [2019-09-08 06:22:55,825 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2245 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=1224, Invalid=17136, Unknown=0, NotChecked=0, Total=18360 [2019-09-08 06:22:55,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-09-08 06:22:55,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2019-09-08 06:22:55,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-09-08 06:22:55,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 97 transitions. [2019-09-08 06:22:55,829 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 97 transitions. Word has length 163 [2019-09-08 06:22:55,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:22:55,829 INFO L475 AbstractCegarLoop]: Abstraction has 66 states and 97 transitions. [2019-09-08 06:22:55,829 INFO L476 AbstractCegarLoop]: Interpolant automaton has 107 states. [2019-09-08 06:22:55,830 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 97 transitions. [2019-09-08 06:22:55,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-09-08 06:22:55,830 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:22:55,830 INFO L399 BasicCegarLoop]: trace histogram [23, 23, 23, 21, 21, 21, 21, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:22:55,831 INFO L418 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:22:55,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:22:55,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1787347383, now seen corresponding path program 80 times [2019-09-08 06:22:55,831 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:22:55,831 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:22:55,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:22:55,832 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:22:55,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:22:55,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:22:59,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1685 backedges. 2 proven. 1428 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2019-09-08 06:22:59,588 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:22:59,588 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:22:59,602 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:22:59,665 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:22:59,665 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:22:59,672 WARN L254 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 275 conjunts are in the unsatisfiable core [2019-09-08 06:22:59,675 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:23:05,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1685 backedges. 78 proven. 772 refuted. 0 times theorem prover too weak. 835 trivial. 0 not checked. [2019-09-08 06:23:05,366 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:23:05,366 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 37] total 110 [2019-09-08 06:23:05,367 INFO L454 AbstractCegarLoop]: Interpolant automaton has 110 states [2019-09-08 06:23:05,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2019-09-08 06:23:05,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=11643, Unknown=0, NotChecked=0, Total=11990 [2019-09-08 06:23:05,368 INFO L87 Difference]: Start difference. First operand 66 states and 97 transitions. Second operand 110 states. [2019-09-08 06:23:12,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:23:12,110 INFO L93 Difference]: Finished difference Result 76 states and 107 transitions. [2019-09-08 06:23:12,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-09-08 06:23:12,111 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 170 [2019-09-08 06:23:12,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:23:12,112 INFO L225 Difference]: With dead ends: 76 [2019-09-08 06:23:12,112 INFO L226 Difference]: Without dead ends: 72 [2019-09-08 06:23:12,113 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2249 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=1264, Invalid=17918, Unknown=0, NotChecked=0, Total=19182 [2019-09-08 06:23:12,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-09-08 06:23:12,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2019-09-08 06:23:12,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-09-08 06:23:12,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 97 transitions. [2019-09-08 06:23:12,118 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 97 transitions. Word has length 170 [2019-09-08 06:23:12,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:23:12,119 INFO L475 AbstractCegarLoop]: Abstraction has 66 states and 97 transitions. [2019-09-08 06:23:12,119 INFO L476 AbstractCegarLoop]: Interpolant automaton has 110 states. [2019-09-08 06:23:12,119 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 97 transitions. [2019-09-08 06:23:12,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-09-08 06:23:12,120 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:23:12,120 INFO L399 BasicCegarLoop]: trace histogram [24, 24, 24, 22, 22, 22, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:23:12,120 INFO L418 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:23:12,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:23:12,121 INFO L82 PathProgramCache]: Analyzing trace with hash 676902604, now seen corresponding path program 81 times [2019-09-08 06:23:12,121 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:23:12,121 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:23:12,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:23:12,121 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:23:12,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:23:12,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:23:16,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1842 backedges. 2 proven. 1562 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2019-09-08 06:23:16,197 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:23:16,198 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:23:16,209 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 06:23:16,309 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2019-09-08 06:23:16,310 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:23:16,314 WARN L254 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 289 conjunts are in the unsatisfiable core [2019-09-08 06:23:16,317 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:23:19,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1842 backedges. 27 proven. 816 refuted. 0 times theorem prover too weak. 999 trivial. 0 not checked. [2019-09-08 06:23:19,741 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:23:19,742 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 36] total 113 [2019-09-08 06:23:19,742 INFO L454 AbstractCegarLoop]: Interpolant automaton has 113 states [2019-09-08 06:23:19,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2019-09-08 06:23:19,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=12349, Unknown=0, NotChecked=0, Total=12656 [2019-09-08 06:23:19,743 INFO L87 Difference]: Start difference. First operand 66 states and 97 transitions. Second operand 113 states. [2019-09-08 06:23:26,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:23:26,970 INFO L93 Difference]: Finished difference Result 76 states and 107 transitions. [2019-09-08 06:23:26,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-09-08 06:23:26,971 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 177 [2019-09-08 06:23:26,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:23:26,972 INFO L225 Difference]: With dead ends: 76 [2019-09-08 06:23:26,972 INFO L226 Difference]: Without dead ends: 72 [2019-09-08 06:23:26,974 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2390 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=1370, Invalid=19222, Unknown=0, NotChecked=0, Total=20592 [2019-09-08 06:23:26,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-09-08 06:23:26,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2019-09-08 06:23:26,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-09-08 06:23:26,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 97 transitions. [2019-09-08 06:23:26,978 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 97 transitions. Word has length 177 [2019-09-08 06:23:26,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:23:26,979 INFO L475 AbstractCegarLoop]: Abstraction has 66 states and 97 transitions. [2019-09-08 06:23:26,979 INFO L476 AbstractCegarLoop]: Interpolant automaton has 113 states. [2019-09-08 06:23:26,979 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 97 transitions. [2019-09-08 06:23:26,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2019-09-08 06:23:26,980 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:23:26,980 INFO L399 BasicCegarLoop]: trace histogram [25, 25, 25, 23, 23, 23, 23, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:23:26,980 INFO L418 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:23:26,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:23:26,981 INFO L82 PathProgramCache]: Analyzing trace with hash -542984941, now seen corresponding path program 82 times [2019-09-08 06:23:26,981 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:23:26,981 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:23:26,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:23:26,982 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:23:26,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:23:27,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:23:31,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2006 backedges. 2 proven. 1702 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2019-09-08 06:23:31,339 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:23:31,340 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:23:31,352 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 06:23:31,413 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:23:31,414 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:23:31,419 WARN L254 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 301 conjunts are in the unsatisfiable core [2019-09-08 06:23:31,422 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:23:35,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2006 backedges. 13 proven. 900 refuted. 0 times theorem prover too weak. 1093 trivial. 0 not checked. [2019-09-08 06:23:35,100 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:23:35,100 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 36] total 116 [2019-09-08 06:23:35,100 INFO L454 AbstractCegarLoop]: Interpolant automaton has 116 states [2019-09-08 06:23:35,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2019-09-08 06:23:35,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=13024, Unknown=0, NotChecked=0, Total=13340 [2019-09-08 06:23:35,102 INFO L87 Difference]: Start difference. First operand 66 states and 97 transitions. Second operand 116 states. [2019-09-08 06:23:42,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:23:42,925 INFO L93 Difference]: Finished difference Result 74 states and 103 transitions. [2019-09-08 06:23:42,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-09-08 06:23:42,926 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 184 [2019-09-08 06:23:42,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:23:42,927 INFO L225 Difference]: With dead ends: 74 [2019-09-08 06:23:42,927 INFO L226 Difference]: Without dead ends: 70 [2019-09-08 06:23:42,930 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2366 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=1410, Invalid=20052, Unknown=0, NotChecked=0, Total=21462 [2019-09-08 06:23:42,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-09-08 06:23:42,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2019-09-08 06:23:42,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-09-08 06:23:42,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 93 transitions. [2019-09-08 06:23:42,935 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 93 transitions. Word has length 184 [2019-09-08 06:23:42,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:23:42,936 INFO L475 AbstractCegarLoop]: Abstraction has 64 states and 93 transitions. [2019-09-08 06:23:42,936 INFO L476 AbstractCegarLoop]: Interpolant automaton has 116 states. [2019-09-08 06:23:42,936 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 93 transitions. [2019-09-08 06:23:42,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-09-08 06:23:42,937 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:23:42,937 INFO L399 BasicCegarLoop]: trace histogram [23, 23, 23, 21, 21, 21, 21, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:23:42,937 INFO L418 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:23:42,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:23:42,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1509347477, now seen corresponding path program 83 times [2019-09-08 06:23:42,938 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:23:42,938 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:23:42,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:23:42,939 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:23:42,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:23:42,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:23:46,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1685 backedges. 0 proven. 1430 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2019-09-08 06:23:46,799 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:23:46,799 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:23:46,811 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 06:23:46,887 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2019-09-08 06:23:46,888 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:23:46,894 WARN L254 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 276 conjunts are in the unsatisfiable core [2019-09-08 06:23:46,897 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:23:50,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1685 backedges. 51 proven. 761 refuted. 0 times theorem prover too weak. 873 trivial. 0 not checked. [2019-09-08 06:23:50,281 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:23:50,281 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 36] total 109 [2019-09-08 06:23:50,281 INFO L454 AbstractCegarLoop]: Interpolant automaton has 109 states [2019-09-08 06:23:50,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2019-09-08 06:23:50,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=11416, Unknown=0, NotChecked=0, Total=11772 [2019-09-08 06:23:50,283 INFO L87 Difference]: Start difference. First operand 64 states and 93 transitions. Second operand 109 states. [2019-09-08 06:23:56,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:23:56,541 INFO L93 Difference]: Finished difference Result 76 states and 117 transitions. [2019-09-08 06:23:56,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-09-08 06:23:56,542 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 170 [2019-09-08 06:23:56,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:23:56,544 INFO L225 Difference]: With dead ends: 76 [2019-09-08 06:23:56,544 INFO L226 Difference]: Without dead ends: 70 [2019-09-08 06:23:56,546 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2048 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=1204, Invalid=17156, Unknown=0, NotChecked=0, Total=18360 [2019-09-08 06:23:56,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-09-08 06:23:56,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2019-09-08 06:23:56,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-09-08 06:23:56,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 98 transitions. [2019-09-08 06:23:56,552 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 98 transitions. Word has length 170 [2019-09-08 06:23:56,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:23:56,552 INFO L475 AbstractCegarLoop]: Abstraction has 66 states and 98 transitions. [2019-09-08 06:23:56,552 INFO L476 AbstractCegarLoop]: Interpolant automaton has 109 states. [2019-09-08 06:23:56,552 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 98 transitions. [2019-09-08 06:23:56,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2019-09-08 06:23:56,553 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:23:56,554 INFO L399 BasicCegarLoop]: trace histogram [25, 25, 25, 23, 23, 23, 23, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:23:56,554 INFO L418 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:23:56,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:23:56,554 INFO L82 PathProgramCache]: Analyzing trace with hash -2104952865, now seen corresponding path program 84 times [2019-09-08 06:23:56,555 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:23:56,555 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:23:56,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:23:56,556 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:23:56,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:23:56,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:24:00,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2006 backedges. 2 proven. 1702 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2019-09-08 06:24:00,967 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:24:00,967 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:24:00,983 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 06:24:01,068 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2019-09-08 06:24:01,069 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:24:01,074 WARN L254 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 301 conjunts are in the unsatisfiable core [2019-09-08 06:24:01,077 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:24:04,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2006 backedges. 12 proven. 898 refuted. 0 times theorem prover too weak. 1096 trivial. 0 not checked. [2019-09-08 06:24:04,488 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:24:04,488 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 34] total 114 [2019-09-08 06:24:04,489 INFO L454 AbstractCegarLoop]: Interpolant automaton has 114 states [2019-09-08 06:24:04,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2019-09-08 06:24:04,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=12570, Unknown=0, NotChecked=0, Total=12882 [2019-09-08 06:24:04,491 INFO L87 Difference]: Start difference. First operand 66 states and 98 transitions. Second operand 114 states. [2019-09-08 06:24:11,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:24:11,103 INFO L93 Difference]: Finished difference Result 74 states and 104 transitions. [2019-09-08 06:24:11,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-09-08 06:24:11,104 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 184 [2019-09-08 06:24:11,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:24:11,105 INFO L225 Difference]: With dead ends: 74 [2019-09-08 06:24:11,105 INFO L226 Difference]: Without dead ends: 70 [2019-09-08 06:24:11,107 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2106 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=1334, Invalid=18972, Unknown=0, NotChecked=0, Total=20306 [2019-09-08 06:24:11,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-09-08 06:24:11,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2019-09-08 06:24:11,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-09-08 06:24:11,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 97 transitions. [2019-09-08 06:24:11,112 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 97 transitions. Word has length 184 [2019-09-08 06:24:11,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:24:11,113 INFO L475 AbstractCegarLoop]: Abstraction has 66 states and 97 transitions. [2019-09-08 06:24:11,113 INFO L476 AbstractCegarLoop]: Interpolant automaton has 114 states. [2019-09-08 06:24:11,113 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 97 transitions. [2019-09-08 06:24:11,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-09-08 06:24:11,114 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:24:11,114 INFO L399 BasicCegarLoop]: trace histogram [26, 26, 26, 24, 24, 24, 24, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:24:11,114 INFO L418 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:24:11,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:24:11,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1198325890, now seen corresponding path program 85 times [2019-09-08 06:24:11,115 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:24:11,115 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:24:11,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:24:11,116 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:24:11,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:24:11,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:24:15,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2177 backedges. 2 proven. 1848 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2019-09-08 06:24:15,809 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:24:15,809 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:24:15,822 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:24:15,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:24:15,906 WARN L254 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 311 conjunts are in the unsatisfiable core [2019-09-08 06:24:15,909 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:24:19,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2177 backedges. 90 proven. 985 refuted. 0 times theorem prover too weak. 1102 trivial. 0 not checked. [2019-09-08 06:24:19,965 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:24:19,965 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 37] total 119 [2019-09-08 06:24:19,965 INFO L454 AbstractCegarLoop]: Interpolant automaton has 119 states [2019-09-08 06:24:19,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2019-09-08 06:24:19,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=13662, Unknown=0, NotChecked=0, Total=14042 [2019-09-08 06:24:19,967 INFO L87 Difference]: Start difference. First operand 66 states and 97 transitions. Second operand 119 states. [2019-09-08 06:24:26,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:24:26,475 INFO L93 Difference]: Finished difference Result 74 states and 103 transitions. [2019-09-08 06:24:26,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-09-08 06:24:26,476 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 191 [2019-09-08 06:24:26,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:24:26,477 INFO L225 Difference]: With dead ends: 74 [2019-09-08 06:24:26,477 INFO L226 Difference]: Without dead ends: 70 [2019-09-08 06:24:26,478 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2260 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=1384, Invalid=20372, Unknown=0, NotChecked=0, Total=21756 [2019-09-08 06:24:26,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-09-08 06:24:26,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2019-09-08 06:24:26,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-09-08 06:24:26,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 93 transitions. [2019-09-08 06:24:26,482 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 93 transitions. Word has length 191 [2019-09-08 06:24:26,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:24:26,483 INFO L475 AbstractCegarLoop]: Abstraction has 64 states and 93 transitions. [2019-09-08 06:24:26,483 INFO L476 AbstractCegarLoop]: Interpolant automaton has 119 states. [2019-09-08 06:24:26,483 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 93 transitions. [2019-09-08 06:24:26,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-09-08 06:24:26,483 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:24:26,483 INFO L399 BasicCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:24:26,484 INFO L418 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:24:26,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:24:26,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1685579895, now seen corresponding path program 86 times [2019-09-08 06:24:26,484 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:24:26,484 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:24:26,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:24:26,485 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:24:26,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:24:26,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:24:28,391 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 2 proven. 752 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-09-08 06:24:28,391 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:24:28,391 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:24:28,403 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:24:28,450 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:24:28,450 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:24:28,454 WARN L254 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 200 conjunts are in the unsatisfiable core [2019-09-08 06:24:28,456 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:24:31,546 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 99 proven. 404 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2019-09-08 06:24:31,550 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:24:31,550 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 42] total 95 [2019-09-08 06:24:31,551 INFO L454 AbstractCegarLoop]: Interpolant automaton has 95 states [2019-09-08 06:24:31,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2019-09-08 06:24:31,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=8640, Unknown=0, NotChecked=0, Total=8930 [2019-09-08 06:24:31,552 INFO L87 Difference]: Start difference. First operand 64 states and 93 transitions. Second operand 95 states. [2019-09-08 06:24:37,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:24:37,552 INFO L93 Difference]: Finished difference Result 77 states and 109 transitions. [2019-09-08 06:24:37,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-09-08 06:24:37,553 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 128 [2019-09-08 06:24:37,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:24:37,554 INFO L225 Difference]: With dead ends: 77 [2019-09-08 06:24:37,554 INFO L226 Difference]: Without dead ends: 73 [2019-09-08 06:24:37,555 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2487 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=1060, Invalid=14690, Unknown=0, NotChecked=0, Total=15750 [2019-09-08 06:24:37,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-09-08 06:24:37,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 69. [2019-09-08 06:24:37,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-09-08 06:24:37,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 102 transitions. [2019-09-08 06:24:37,560 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 102 transitions. Word has length 128 [2019-09-08 06:24:37,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:24:37,560 INFO L475 AbstractCegarLoop]: Abstraction has 69 states and 102 transitions. [2019-09-08 06:24:37,560 INFO L476 AbstractCegarLoop]: Interpolant automaton has 95 states. [2019-09-08 06:24:37,560 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 102 transitions. [2019-09-08 06:24:37,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-09-08 06:24:37,561 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:24:37,561 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 18, 16, 16, 16, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:24:37,561 INFO L418 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:24:37,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:24:37,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1941194080, now seen corresponding path program 87 times [2019-09-08 06:24:37,562 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:24:37,562 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:24:37,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:24:37,562 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:24:37,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:24:37,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:24:39,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 2 proven. 848 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-09-08 06:24:39,961 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:24:39,961 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:24:39,972 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 06:24:40,038 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-09-08 06:24:40,038 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:24:40,043 WARN L254 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 217 conjunts are in the unsatisfiable core [2019-09-08 06:24:40,045 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:24:42,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 14 proven. 468 refuted. 0 times theorem prover too weak. 523 trivial. 0 not checked. [2019-09-08 06:24:43,000 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:24:43,001 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 38] total 97 [2019-09-08 06:24:43,001 INFO L454 AbstractCegarLoop]: Interpolant automaton has 97 states [2019-09-08 06:24:43,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2019-09-08 06:24:43,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=9055, Unknown=0, NotChecked=0, Total=9312 [2019-09-08 06:24:43,002 INFO L87 Difference]: Start difference. First operand 69 states and 102 transitions. Second operand 97 states. [2019-09-08 06:24:49,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:24:49,799 INFO L93 Difference]: Finished difference Result 79 states and 112 transitions. [2019-09-08 06:24:49,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-09-08 06:24:49,800 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 135 [2019-09-08 06:24:49,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:24:49,801 INFO L225 Difference]: With dead ends: 79 [2019-09-08 06:24:49,801 INFO L226 Difference]: Without dead ends: 75 [2019-09-08 06:24:49,803 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2614 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=1192, Invalid=15578, Unknown=0, NotChecked=0, Total=16770 [2019-09-08 06:24:49,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-09-08 06:24:49,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 69. [2019-09-08 06:24:49,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-09-08 06:24:49,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 102 transitions. [2019-09-08 06:24:49,807 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 102 transitions. Word has length 135 [2019-09-08 06:24:49,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:24:49,808 INFO L475 AbstractCegarLoop]: Abstraction has 69 states and 102 transitions. [2019-09-08 06:24:49,808 INFO L476 AbstractCegarLoop]: Interpolant automaton has 97 states. [2019-09-08 06:24:49,808 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 102 transitions. [2019-09-08 06:24:49,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-09-08 06:24:49,808 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:24:49,809 INFO L399 BasicCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:24:49,809 INFO L418 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:24:49,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:24:49,809 INFO L82 PathProgramCache]: Analyzing trace with hash 898992641, now seen corresponding path program 88 times [2019-09-08 06:24:49,809 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:24:49,809 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:24:49,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:24:49,810 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:24:49,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:24:49,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:24:52,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 2 proven. 952 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2019-09-08 06:24:52,488 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:24:52,488 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:24:52,503 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 06:24:52,552 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:24:52,553 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:24:52,557 WARN L254 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 229 conjunts are in the unsatisfiable core [2019-09-08 06:24:52,559 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:24:55,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 14 proven. 521 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked. [2019-09-08 06:24:55,603 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:24:55,604 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 38] total 100 [2019-09-08 06:24:55,604 INFO L454 AbstractCegarLoop]: Interpolant automaton has 100 states [2019-09-08 06:24:55,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2019-09-08 06:24:55,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=9634, Unknown=0, NotChecked=0, Total=9900 [2019-09-08 06:24:55,606 INFO L87 Difference]: Start difference. First operand 69 states and 102 transitions. Second operand 100 states. [2019-09-08 06:25:01,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:25:01,708 INFO L93 Difference]: Finished difference Result 79 states and 112 transitions. [2019-09-08 06:25:01,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-09-08 06:25:01,709 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 142 [2019-09-08 06:25:01,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:25:01,710 INFO L225 Difference]: With dead ends: 79 [2019-09-08 06:25:01,710 INFO L226 Difference]: Without dead ends: 75 [2019-09-08 06:25:01,712 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2618 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=1234, Invalid=16322, Unknown=0, NotChecked=0, Total=17556 [2019-09-08 06:25:01,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-09-08 06:25:01,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 69. [2019-09-08 06:25:01,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-09-08 06:25:01,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 102 transitions. [2019-09-08 06:25:01,718 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 102 transitions. Word has length 142 [2019-09-08 06:25:01,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:25:01,718 INFO L475 AbstractCegarLoop]: Abstraction has 69 states and 102 transitions. [2019-09-08 06:25:01,718 INFO L476 AbstractCegarLoop]: Interpolant automaton has 100 states. [2019-09-08 06:25:01,718 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 102 transitions. [2019-09-08 06:25:01,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-09-08 06:25:01,719 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:25:01,719 INFO L399 BasicCegarLoop]: trace histogram [20, 20, 20, 18, 18, 18, 18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:25:01,720 INFO L418 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:25:01,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:25:01,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1127427690, now seen corresponding path program 89 times [2019-09-08 06:25:01,720 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:25:01,720 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:25:01,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:25:01,721 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:25:01,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:25:01,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:25:04,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 2 proven. 1062 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2019-09-08 06:25:04,662 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:25:04,662 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:25:04,674 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 06:25:04,741 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-09-08 06:25:04,741 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:25:04,748 WARN L254 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 240 conjunts are in the unsatisfiable core [2019-09-08 06:25:04,750 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:25:07,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 62 proven. 567 refuted. 0 times theorem prover too weak. 627 trivial. 0 not checked. [2019-09-08 06:25:07,977 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:25:07,978 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 41] total 105 [2019-09-08 06:25:07,978 INFO L454 AbstractCegarLoop]: Interpolant automaton has 105 states [2019-09-08 06:25:07,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2019-09-08 06:25:07,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=10591, Unknown=0, NotChecked=0, Total=10920 [2019-09-08 06:25:07,979 INFO L87 Difference]: Start difference. First operand 69 states and 102 transitions. Second operand 105 states. [2019-09-08 06:25:13,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:25:13,289 INFO L93 Difference]: Finished difference Result 79 states and 112 transitions. [2019-09-08 06:25:13,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-09-08 06:25:13,289 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 149 [2019-09-08 06:25:13,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:25:13,290 INFO L225 Difference]: With dead ends: 79 [2019-09-08 06:25:13,291 INFO L226 Difference]: Without dead ends: 75 [2019-09-08 06:25:13,292 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2699 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=1247, Invalid=17113, Unknown=0, NotChecked=0, Total=18360 [2019-09-08 06:25:13,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-09-08 06:25:13,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 69. [2019-09-08 06:25:13,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-09-08 06:25:13,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 102 transitions. [2019-09-08 06:25:13,298 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 102 transitions. Word has length 149 [2019-09-08 06:25:13,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:25:13,298 INFO L475 AbstractCegarLoop]: Abstraction has 69 states and 102 transitions. [2019-09-08 06:25:13,298 INFO L476 AbstractCegarLoop]: Interpolant automaton has 105 states. [2019-09-08 06:25:13,299 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 102 transitions. [2019-09-08 06:25:13,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-09-08 06:25:13,300 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:25:13,300 INFO L399 BasicCegarLoop]: trace histogram [21, 21, 21, 19, 19, 19, 19, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:25:13,300 INFO L418 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:25:13,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:25:13,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1676612235, now seen corresponding path program 90 times [2019-09-08 06:25:13,300 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:25:13,301 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:25:13,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:25:13,301 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:25:13,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:25:13,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:25:16,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1392 backedges. 2 proven. 1178 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2019-09-08 06:25:16,385 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:25:16,385 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:25:16,396 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 06:25:16,471 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2019-09-08 06:25:16,472 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:25:16,477 WARN L254 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 253 conjunts are in the unsatisfiable core [2019-09-08 06:25:16,479 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:25:21,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1392 backedges. 14 proven. 636 refuted. 0 times theorem prover too weak. 742 trivial. 0 not checked. [2019-09-08 06:25:21,834 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:25:21,835 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 38] total 106 [2019-09-08 06:25:21,835 INFO L454 AbstractCegarLoop]: Interpolant automaton has 106 states [2019-09-08 06:25:21,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2019-09-08 06:25:21,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=10846, Unknown=0, NotChecked=0, Total=11130 [2019-09-08 06:25:21,837 INFO L87 Difference]: Start difference. First operand 69 states and 102 transitions. Second operand 106 states. [2019-09-08 06:25:28,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:25:28,950 INFO L93 Difference]: Finished difference Result 79 states and 112 transitions. [2019-09-08 06:25:28,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-09-08 06:25:28,950 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 156 [2019-09-08 06:25:28,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:25:28,951 INFO L225 Difference]: With dead ends: 79 [2019-09-08 06:25:28,952 INFO L226 Difference]: Without dead ends: 75 [2019-09-08 06:25:28,954 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2627 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=1318, Invalid=17864, Unknown=0, NotChecked=0, Total=19182 [2019-09-08 06:25:28,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-09-08 06:25:28,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 69. [2019-09-08 06:25:28,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-09-08 06:25:28,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 102 transitions. [2019-09-08 06:25:28,960 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 102 transitions. Word has length 156 [2019-09-08 06:25:28,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:25:28,960 INFO L475 AbstractCegarLoop]: Abstraction has 69 states and 102 transitions. [2019-09-08 06:25:28,960 INFO L476 AbstractCegarLoop]: Interpolant automaton has 106 states. [2019-09-08 06:25:28,960 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 102 transitions. [2019-09-08 06:25:28,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-09-08 06:25:28,961 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:25:28,961 INFO L399 BasicCegarLoop]: trace histogram [22, 22, 22, 20, 20, 20, 20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:25:28,961 INFO L418 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:25:28,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:25:28,961 INFO L82 PathProgramCache]: Analyzing trace with hash -834449012, now seen corresponding path program 91 times [2019-09-08 06:25:28,962 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:25:28,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:25:28,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:25:28,962 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:25:28,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:25:29,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:25:32,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1535 backedges. 2 proven. 1300 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2019-09-08 06:25:32,446 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:25:32,447 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:25:32,458 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:25:32,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:25:32,525 WARN L254 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 263 conjunts are in the unsatisfiable core [2019-09-08 06:25:32,527 INFO L279 TraceCheckSpWp]: Computing forward predicates...