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/psyco/psyco_abp_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 19:42:49,061 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 19:42:49,063 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 19:42:49,075 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 19:42:49,075 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 19:42:49,076 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 19:42:49,077 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 19:42:49,079 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 19:42:49,081 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 19:42:49,081 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 19:42:49,082 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 19:42:49,083 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 19:42:49,084 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 19:42:49,085 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 19:42:49,086 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 19:42:49,087 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 19:42:49,087 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 19:42:49,088 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 19:42:49,090 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 19:42:49,092 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 19:42:49,093 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 19:42:49,094 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 19:42:49,095 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 19:42:49,096 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 19:42:49,098 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 19:42:49,101 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 19:42:49,101 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 19:42:49,102 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 19:42:49,103 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 19:42:49,104 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 19:42:49,104 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 19:42:49,105 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 19:42:49,105 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 19:42:49,105 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 19:42:49,106 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 19:42:49,107 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 19:42:49,107 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 19:42:49,121 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 19:42:49,121 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 19:42:49,122 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 19:42:49,122 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 19:42:49,123 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 19:42:49,123 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 19:42:49,123 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 19:42:49,123 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 19:42:49,124 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 19:42:49,124 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 19:42:49,124 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 19:42:49,124 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 19:42:49,124 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 19:42:49,125 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 19:42:49,125 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 19:42:49,125 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 19:42:49,125 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 19:42:49,125 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 19:42:49,126 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 19:42:49,126 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 19:42:49,126 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 19:42:49,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 19:42:49,126 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 19:42:49,127 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 19:42:49,127 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 19:42:49,127 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 19:42:49,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 19:42:49,127 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 19:42:49,128 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 19:42:49,396 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 19:42:49,412 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 19:42:49,416 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 19:42:49,417 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 19:42:49,418 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 19:42:49,418 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/psyco/psyco_abp_1-1.c [2019-10-13 19:42:49,482 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4bd8e5d4/3d3726ea24a74858955d7d4176255a6e/FLAG54f4fa878 [2019-10-13 19:42:49,984 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 19:42:49,985 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/psyco/psyco_abp_1-1.c [2019-10-13 19:42:50,004 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4bd8e5d4/3d3726ea24a74858955d7d4176255a6e/FLAG54f4fa878 [2019-10-13 19:42:50,348 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4bd8e5d4/3d3726ea24a74858955d7d4176255a6e [2019-10-13 19:42:50,358 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 19:42:50,360 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 19:42:50,363 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 19:42:50,363 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 19:42:50,367 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 19:42:50,368 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:42:50" (1/1) ... [2019-10-13 19:42:50,371 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39fb0a41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:50, skipping insertion in model container [2019-10-13 19:42:50,371 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:42:50" (1/1) ... [2019-10-13 19:42:50,379 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 19:42:50,430 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 19:42:50,714 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:42:50,719 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 19:42:50,916 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:42:50,940 INFO L192 MainTranslator]: Completed translation [2019-10-13 19:42:50,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:50 WrapperNode [2019-10-13 19:42:50,944 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 19:42:50,945 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 19:42:50,945 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 19:42:50,945 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 19:42:50,958 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:50" (1/1) ... [2019-10-13 19:42:50,958 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:50" (1/1) ... [2019-10-13 19:42:50,969 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:50" (1/1) ... [2019-10-13 19:42:50,969 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:50" (1/1) ... [2019-10-13 19:42:50,991 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:50" (1/1) ... [2019-10-13 19:42:51,014 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:50" (1/1) ... [2019-10-13 19:42:51,018 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:50" (1/1) ... [2019-10-13 19:42:51,024 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 19:42:51,024 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 19:42:51,024 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 19:42:51,024 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 19:42:51,027 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:50" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 19:42:51,079 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 19:42:51,080 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 19:42:51,080 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 19:42:51,080 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 19:42:51,080 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 19:42:51,080 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 19:42:51,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 19:42:51,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 19:42:51,852 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 19:42:51,853 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-13 19:42:51,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:42:51 BoogieIcfgContainer [2019-10-13 19:42:51,854 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 19:42:51,855 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 19:42:51,856 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 19:42:51,859 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 19:42:51,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:42:50" (1/3) ... [2019-10-13 19:42:51,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@796318cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:42:51, skipping insertion in model container [2019-10-13 19:42:51,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:50" (2/3) ... [2019-10-13 19:42:51,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@796318cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:42:51, skipping insertion in model container [2019-10-13 19:42:51,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:42:51" (3/3) ... [2019-10-13 19:42:51,863 INFO L109 eAbstractionObserver]: Analyzing ICFG psyco_abp_1-1.c [2019-10-13 19:42:51,872 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 19:42:51,880 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 19:42:51,892 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 19:42:51,919 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 19:42:51,919 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 19:42:51,919 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 19:42:51,919 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 19:42:51,920 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 19:42:51,920 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 19:42:51,920 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 19:42:51,920 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 19:42:51,950 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states. [2019-10-13 19:42:51,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-13 19:42:51,958 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:42:51,959 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:42:51,961 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:42:51,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:42:51,966 INFO L82 PathProgramCache]: Analyzing trace with hash 919157391, now seen corresponding path program 1 times [2019-10-13 19:42:51,972 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:42:51,972 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332032117] [2019-10-13 19:42:51,972 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:42:51,973 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:42:51,973 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:42:52,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:42:52,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:42:52,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:42:52,170 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332032117] [2019-10-13 19:42:52,171 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:42:52,171 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:42:52,172 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112640176] [2019-10-13 19:42:52,177 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:42:52,177 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:42:52,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:42:52,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:42:52,197 INFO L87 Difference]: Start difference. First operand 115 states. Second operand 4 states. [2019-10-13 19:42:53,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:42:53,011 INFO L93 Difference]: Finished difference Result 331 states and 635 transitions. [2019-10-13 19:42:53,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 19:42:53,013 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-10-13 19:42:53,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:42:53,030 INFO L225 Difference]: With dead ends: 331 [2019-10-13 19:42:53,030 INFO L226 Difference]: Without dead ends: 206 [2019-10-13 19:42:53,037 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:42:53,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-10-13 19:42:53,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 182. [2019-10-13 19:42:53,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2019-10-13 19:42:53,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 314 transitions. [2019-10-13 19:42:53,141 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 314 transitions. Word has length 14 [2019-10-13 19:42:53,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:42:53,142 INFO L462 AbstractCegarLoop]: Abstraction has 182 states and 314 transitions. [2019-10-13 19:42:53,142 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:42:53,142 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 314 transitions. [2019-10-13 19:42:53,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-13 19:42:53,144 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:42:53,145 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:42:53,145 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:42:53,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:42:53,147 INFO L82 PathProgramCache]: Analyzing trace with hash 736602936, now seen corresponding path program 1 times [2019-10-13 19:42:53,147 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:42:53,148 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821355444] [2019-10-13 19:42:53,148 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:42:53,148 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:42:53,148 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:42:53,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:42:53,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:42:53,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:42:53,253 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821355444] [2019-10-13 19:42:53,253 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:42:53,253 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:42:53,253 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840814823] [2019-10-13 19:42:53,255 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:42:53,256 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:42:53,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:42:53,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:42:53,257 INFO L87 Difference]: Start difference. First operand 182 states and 314 transitions. Second operand 4 states. [2019-10-13 19:42:53,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:42:53,647 INFO L93 Difference]: Finished difference Result 365 states and 632 transitions. [2019-10-13 19:42:53,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 19:42:53,647 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-10-13 19:42:53,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:42:53,649 INFO L225 Difference]: With dead ends: 365 [2019-10-13 19:42:53,649 INFO L226 Difference]: Without dead ends: 189 [2019-10-13 19:42:53,651 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:42:53,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-10-13 19:42:53,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2019-10-13 19:42:53,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2019-10-13 19:42:53,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 322 transitions. [2019-10-13 19:42:53,666 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 322 transitions. Word has length 15 [2019-10-13 19:42:53,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:42:53,666 INFO L462 AbstractCegarLoop]: Abstraction has 189 states and 322 transitions. [2019-10-13 19:42:53,666 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:42:53,667 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 322 transitions. [2019-10-13 19:42:53,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-13 19:42:53,668 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:42:53,668 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:42:53,668 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:42:53,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:42:53,669 INFO L82 PathProgramCache]: Analyzing trace with hash 816788357, now seen corresponding path program 1 times [2019-10-13 19:42:53,669 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:42:53,670 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901918888] [2019-10-13 19:42:53,670 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:42:53,670 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:42:53,670 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:42:53,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:42:54,064 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 30 [2019-10-13 19:42:54,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:42:54,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:42:54,096 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901918888] [2019-10-13 19:42:54,097 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:42:54,097 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 19:42:54,097 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766256555] [2019-10-13 19:42:54,098 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 19:42:54,098 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:42:54,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 19:42:54,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:42:54,098 INFO L87 Difference]: Start difference. First operand 189 states and 322 transitions. Second operand 5 states. [2019-10-13 19:42:54,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:42:54,748 INFO L93 Difference]: Finished difference Result 292 states and 485 transitions. [2019-10-13 19:42:54,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 19:42:54,749 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2019-10-13 19:42:54,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:42:54,764 INFO L225 Difference]: With dead ends: 292 [2019-10-13 19:42:54,765 INFO L226 Difference]: Without dead ends: 276 [2019-10-13 19:42:54,765 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 19:42:54,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2019-10-13 19:42:54,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 259. [2019-10-13 19:42:54,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2019-10-13 19:42:54,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 436 transitions. [2019-10-13 19:42:54,779 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 436 transitions. Word has length 21 [2019-10-13 19:42:54,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:42:54,780 INFO L462 AbstractCegarLoop]: Abstraction has 259 states and 436 transitions. [2019-10-13 19:42:54,780 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 19:42:54,780 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 436 transitions. [2019-10-13 19:42:54,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-13 19:42:54,781 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:42:54,781 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:42:54,781 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:42:54,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:42:54,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1993084704, now seen corresponding path program 1 times [2019-10-13 19:42:54,782 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:42:54,782 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82368886] [2019-10-13 19:42:54,783 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:42:54,783 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:42:54,783 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:42:54,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:42:54,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:42:54,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:42:54,847 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82368886] [2019-10-13 19:42:54,847 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:42:54,847 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:42:54,848 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547007667] [2019-10-13 19:42:54,848 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:42:54,848 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:42:54,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:42:54,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:42:54,849 INFO L87 Difference]: Start difference. First operand 259 states and 436 transitions. Second operand 4 states. [2019-10-13 19:42:55,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:42:55,081 INFO L93 Difference]: Finished difference Result 468 states and 791 transitions. [2019-10-13 19:42:55,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 19:42:55,081 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2019-10-13 19:42:55,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:42:55,085 INFO L225 Difference]: With dead ends: 468 [2019-10-13 19:42:55,085 INFO L226 Difference]: Without dead ends: 216 [2019-10-13 19:42:55,087 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:42:55,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2019-10-13 19:42:55,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 214. [2019-10-13 19:42:55,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-10-13 19:42:55,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 355 transitions. [2019-10-13 19:42:55,109 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 355 transitions. Word has length 22 [2019-10-13 19:42:55,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:42:55,109 INFO L462 AbstractCegarLoop]: Abstraction has 214 states and 355 transitions. [2019-10-13 19:42:55,111 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:42:55,111 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 355 transitions. [2019-10-13 19:42:55,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-13 19:42:55,114 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:42:55,114 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:42:55,114 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:42:55,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:42:55,115 INFO L82 PathProgramCache]: Analyzing trace with hash -365898165, now seen corresponding path program 1 times [2019-10-13 19:42:55,115 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:42:55,115 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361131884] [2019-10-13 19:42:55,115 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:42:55,115 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:42:55,116 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:42:55,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:42:55,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:42:55,208 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:42:55,208 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361131884] [2019-10-13 19:42:55,209 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812620905] [2019-10-13 19:42:55,209 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:42:55,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:42:55,286 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 19:42:55,295 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:42:55,334 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 19:42:55,335 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:42:55,335 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-13 19:42:55,335 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066251414] [2019-10-13 19:42:55,336 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 19:42:55,336 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:42:55,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 19:42:55,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:42:55,336 INFO L87 Difference]: Start difference. First operand 214 states and 355 transitions. Second operand 3 states. [2019-10-13 19:42:55,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:42:55,366 INFO L93 Difference]: Finished difference Result 389 states and 646 transitions. [2019-10-13 19:42:55,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 19:42:55,366 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2019-10-13 19:42:55,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:42:55,367 INFO L225 Difference]: With dead ends: 389 [2019-10-13 19:42:55,368 INFO L226 Difference]: Without dead ends: 182 [2019-10-13 19:42:55,369 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:42:55,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-10-13 19:42:55,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 180. [2019-10-13 19:42:55,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2019-10-13 19:42:55,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 291 transitions. [2019-10-13 19:42:55,378 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 291 transitions. Word has length 28 [2019-10-13 19:42:55,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:42:55,378 INFO L462 AbstractCegarLoop]: Abstraction has 180 states and 291 transitions. [2019-10-13 19:42:55,378 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 19:42:55,378 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 291 transitions. [2019-10-13 19:42:55,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-13 19:42:55,380 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:42:55,380 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:42:55,585 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:42:55,585 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:42:55,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:42:55,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1624798356, now seen corresponding path program 1 times [2019-10-13 19:42:55,586 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:42:55,586 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303907022] [2019-10-13 19:42:55,586 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:42:55,586 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:42:55,586 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:42:55,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:42:55,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:42:55,680 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:42:55,682 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303907022] [2019-10-13 19:42:55,682 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990768077] [2019-10-13 19:42:55,682 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:42:55,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:42:55,761 INFO L256 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 19:42:55,771 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:42:55,783 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:42:55,784 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:42:55,784 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2019-10-13 19:42:55,784 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637990836] [2019-10-13 19:42:55,785 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 19:42:55,785 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:42:55,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 19:42:55,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:42:55,786 INFO L87 Difference]: Start difference. First operand 180 states and 291 transitions. Second operand 5 states. [2019-10-13 19:42:56,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:42:56,420 INFO L93 Difference]: Finished difference Result 435 states and 706 transitions. [2019-10-13 19:42:56,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 19:42:56,426 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2019-10-13 19:42:56,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:42:56,428 INFO L225 Difference]: With dead ends: 435 [2019-10-13 19:42:56,429 INFO L226 Difference]: Without dead ends: 282 [2019-10-13 19:42:56,429 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 19:42:56,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2019-10-13 19:42:56,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 245. [2019-10-13 19:42:56,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2019-10-13 19:42:56,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 408 transitions. [2019-10-13 19:42:56,439 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 408 transitions. Word has length 30 [2019-10-13 19:42:56,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:42:56,440 INFO L462 AbstractCegarLoop]: Abstraction has 245 states and 408 transitions. [2019-10-13 19:42:56,440 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 19:42:56,440 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 408 transitions. [2019-10-13 19:42:56,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-13 19:42:56,441 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:42:56,441 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:42:56,645 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:42:56,646 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:42:56,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:42:56,647 INFO L82 PathProgramCache]: Analyzing trace with hash -944739986, now seen corresponding path program 1 times [2019-10-13 19:42:56,648 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:42:56,648 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036944812] [2019-10-13 19:42:56,648 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:42:56,649 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:42:56,649 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:42:56,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:42:56,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:42:56,713 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:42:56,713 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036944812] [2019-10-13 19:42:56,713 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366609130] [2019-10-13 19:42:56,714 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:42:56,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:42:56,768 INFO L256 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 19:42:56,770 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:42:56,784 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:42:56,784 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:42:56,784 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-13 19:42:56,784 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582725234] [2019-10-13 19:42:56,785 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 19:42:56,785 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:42:56,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 19:42:56,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:42:56,786 INFO L87 Difference]: Start difference. First operand 245 states and 408 transitions. Second operand 6 states. [2019-10-13 19:42:57,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:42:57,487 INFO L93 Difference]: Finished difference Result 464 states and 780 transitions. [2019-10-13 19:42:57,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 19:42:57,488 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2019-10-13 19:42:57,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:42:57,493 INFO L225 Difference]: With dead ends: 464 [2019-10-13 19:42:57,493 INFO L226 Difference]: Without dead ends: 452 [2019-10-13 19:42:57,494 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-13 19:42:57,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2019-10-13 19:42:57,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 438. [2019-10-13 19:42:57,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 438 states. [2019-10-13 19:42:57,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 730 transitions. [2019-10-13 19:42:57,507 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 730 transitions. Word has length 30 [2019-10-13 19:42:57,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:42:57,508 INFO L462 AbstractCegarLoop]: Abstraction has 438 states and 730 transitions. [2019-10-13 19:42:57,508 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 19:42:57,508 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 730 transitions. [2019-10-13 19:42:57,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-13 19:42:57,510 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:42:57,510 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:42:57,713 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:42:57,717 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:42:57,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:42:57,718 INFO L82 PathProgramCache]: Analyzing trace with hash 789275061, now seen corresponding path program 1 times [2019-10-13 19:42:57,718 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:42:57,719 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894116472] [2019-10-13 19:42:57,719 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:42:57,719 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:42:57,719 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:42:57,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:42:57,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:42:57,853 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:42:57,854 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894116472] [2019-10-13 19:42:57,854 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475918763] [2019-10-13 19:42:57,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:42:57,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:42:57,921 INFO L256 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 19:42:57,923 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:42:57,950 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:42:57,950 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:42:57,950 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 7 [2019-10-13 19:42:57,951 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65180441] [2019-10-13 19:42:57,951 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 19:42:57,951 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:42:57,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 19:42:57,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 19:42:57,952 INFO L87 Difference]: Start difference. First operand 438 states and 730 transitions. Second operand 7 states. [2019-10-13 19:42:58,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:42:58,727 INFO L93 Difference]: Finished difference Result 495 states and 817 transitions. [2019-10-13 19:42:58,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 19:42:58,728 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2019-10-13 19:42:58,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:42:58,733 INFO L225 Difference]: With dead ends: 495 [2019-10-13 19:42:58,733 INFO L226 Difference]: Without dead ends: 490 [2019-10-13 19:42:58,734 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-13 19:42:58,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2019-10-13 19:42:58,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 484. [2019-10-13 19:42:58,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 484 states. [2019-10-13 19:42:58,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 802 transitions. [2019-10-13 19:42:58,754 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 802 transitions. Word has length 31 [2019-10-13 19:42:58,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:42:58,756 INFO L462 AbstractCegarLoop]: Abstraction has 484 states and 802 transitions. [2019-10-13 19:42:58,756 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 19:42:58,756 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 802 transitions. [2019-10-13 19:42:58,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-13 19:42:58,757 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:42:58,758 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:42:58,962 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:42:58,963 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:42:58,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:42:58,964 INFO L82 PathProgramCache]: Analyzing trace with hash 2038890699, now seen corresponding path program 1 times [2019-10-13 19:42:58,964 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:42:58,965 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943645821] [2019-10-13 19:42:58,965 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:42:58,966 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:42:58,966 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:42:58,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:42:59,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:42:59,013 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 19:42:59,013 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943645821] [2019-10-13 19:42:59,014 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:42:59,014 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:42:59,014 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983595328] [2019-10-13 19:42:59,018 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:42:59,018 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:42:59,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:42:59,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:42:59,018 INFO L87 Difference]: Start difference. First operand 484 states and 802 transitions. Second operand 4 states. [2019-10-13 19:42:59,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:42:59,277 INFO L93 Difference]: Finished difference Result 949 states and 1566 transitions. [2019-10-13 19:42:59,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 19:42:59,278 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2019-10-13 19:42:59,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:42:59,281 INFO L225 Difference]: With dead ends: 949 [2019-10-13 19:42:59,282 INFO L226 Difference]: Without dead ends: 495 [2019-10-13 19:42:59,283 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:42:59,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2019-10-13 19:42:59,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 493. [2019-10-13 19:42:59,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 493 states. [2019-10-13 19:42:59,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 794 transitions. [2019-10-13 19:42:59,304 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 794 transitions. Word has length 32 [2019-10-13 19:42:59,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:42:59,304 INFO L462 AbstractCegarLoop]: Abstraction has 493 states and 794 transitions. [2019-10-13 19:42:59,305 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:42:59,305 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 794 transitions. [2019-10-13 19:42:59,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-13 19:42:59,306 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:42:59,306 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:42:59,307 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:42:59,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:42:59,307 INFO L82 PathProgramCache]: Analyzing trace with hash 820851006, now seen corresponding path program 1 times [2019-10-13 19:42:59,307 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:42:59,307 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511944198] [2019-10-13 19:42:59,307 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:42:59,308 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:42:59,308 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:42:59,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:42:59,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:42:59,374 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 19:42:59,375 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511944198] [2019-10-13 19:42:59,375 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:42:59,375 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:42:59,375 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163627506] [2019-10-13 19:42:59,376 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:42:59,376 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:42:59,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:42:59,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:42:59,377 INFO L87 Difference]: Start difference. First operand 493 states and 794 transitions. Second operand 4 states. [2019-10-13 19:42:59,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:42:59,539 INFO L93 Difference]: Finished difference Result 939 states and 1525 transitions. [2019-10-13 19:42:59,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 19:42:59,540 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2019-10-13 19:42:59,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:42:59,544 INFO L225 Difference]: With dead ends: 939 [2019-10-13 19:42:59,545 INFO L226 Difference]: Without dead ends: 495 [2019-10-13 19:42:59,546 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:42:59,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2019-10-13 19:42:59,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 493. [2019-10-13 19:42:59,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 493 states. [2019-10-13 19:42:59,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 788 transitions. [2019-10-13 19:42:59,564 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 788 transitions. Word has length 40 [2019-10-13 19:42:59,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:42:59,565 INFO L462 AbstractCegarLoop]: Abstraction has 493 states and 788 transitions. [2019-10-13 19:42:59,565 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:42:59,565 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 788 transitions. [2019-10-13 19:42:59,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-13 19:42:59,569 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:42:59,570 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:42:59,570 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:42:59,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:42:59,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1867136664, now seen corresponding path program 1 times [2019-10-13 19:42:59,571 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:42:59,571 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106521300] [2019-10-13 19:42:59,571 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:42:59,571 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:42:59,572 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:42:59,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:42:59,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:42:59,857 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:42:59,857 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106521300] [2019-10-13 19:42:59,857 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874915062] [2019-10-13 19:42:59,858 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:42:59,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:42:59,922 INFO L256 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 19:42:59,924 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:42:59,959 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 19:42:59,960 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:42:59,960 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 9 [2019-10-13 19:42:59,960 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348718243] [2019-10-13 19:42:59,960 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 19:42:59,960 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:42:59,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 19:42:59,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-10-13 19:42:59,961 INFO L87 Difference]: Start difference. First operand 493 states and 788 transitions. Second operand 9 states. [2019-10-13 19:43:01,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:01,346 INFO L93 Difference]: Finished difference Result 1034 states and 1641 transitions. [2019-10-13 19:43:01,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 19:43:01,347 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2019-10-13 19:43:01,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:01,351 INFO L225 Difference]: With dead ends: 1034 [2019-10-13 19:43:01,351 INFO L226 Difference]: Without dead ends: 583 [2019-10-13 19:43:01,352 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2019-10-13 19:43:01,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2019-10-13 19:43:01,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 544. [2019-10-13 19:43:01,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2019-10-13 19:43:01,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 867 transitions. [2019-10-13 19:43:01,370 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 867 transitions. Word has length 41 [2019-10-13 19:43:01,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:01,371 INFO L462 AbstractCegarLoop]: Abstraction has 544 states and 867 transitions. [2019-10-13 19:43:01,371 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 19:43:01,371 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 867 transitions. [2019-10-13 19:43:01,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-13 19:43:01,372 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:01,372 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:01,584 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:01,585 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:01,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:01,585 INFO L82 PathProgramCache]: Analyzing trace with hash -2035215205, now seen corresponding path program 1 times [2019-10-13 19:43:01,586 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:01,586 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402059502] [2019-10-13 19:43:01,586 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:01,586 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:01,587 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:01,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:01,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:01,673 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 19:43:01,674 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402059502] [2019-10-13 19:43:01,674 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964786877] [2019-10-13 19:43:01,674 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:01,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:01,736 INFO L256 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 19:43:01,740 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:43:01,754 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 19:43:01,754 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:43:01,754 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2019-10-13 19:43:01,754 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943450946] [2019-10-13 19:43:01,755 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 19:43:01,755 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:01,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 19:43:01,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:43:01,756 INFO L87 Difference]: Start difference. First operand 544 states and 867 transitions. Second operand 5 states. [2019-10-13 19:43:02,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:02,247 INFO L93 Difference]: Finished difference Result 558 states and 879 transitions. [2019-10-13 19:43:02,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 19:43:02,248 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2019-10-13 19:43:02,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:02,251 INFO L225 Difference]: With dead ends: 558 [2019-10-13 19:43:02,251 INFO L226 Difference]: Without dead ends: 546 [2019-10-13 19:43:02,251 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 19:43:02,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2019-10-13 19:43:02,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 544. [2019-10-13 19:43:02,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2019-10-13 19:43:02,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 841 transitions. [2019-10-13 19:43:02,269 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 841 transitions. Word has length 42 [2019-10-13 19:43:02,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:02,270 INFO L462 AbstractCegarLoop]: Abstraction has 544 states and 841 transitions. [2019-10-13 19:43:02,270 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 19:43:02,271 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 841 transitions. [2019-10-13 19:43:02,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-13 19:43:02,272 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:02,272 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:02,483 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:02,484 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:02,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:02,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1265387988, now seen corresponding path program 1 times [2019-10-13 19:43:02,484 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:02,484 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273196987] [2019-10-13 19:43:02,485 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:02,485 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:02,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:02,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:02,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:02,721 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:43:02,722 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273196987] [2019-10-13 19:43:02,722 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642612121] [2019-10-13 19:43:02,722 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:02,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:02,822 INFO L256 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-13 19:43:02,824 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:43:02,857 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:43:02,857 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:43:02,858 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2019-10-13 19:43:02,858 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141840708] [2019-10-13 19:43:02,858 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 19:43:02,858 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:02,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 19:43:02,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:43:02,859 INFO L87 Difference]: Start difference. First operand 544 states and 841 transitions. Second operand 6 states. [2019-10-13 19:43:03,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:03,537 INFO L93 Difference]: Finished difference Result 553 states and 848 transitions. [2019-10-13 19:43:03,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 19:43:03,538 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2019-10-13 19:43:03,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:03,542 INFO L225 Difference]: With dead ends: 553 [2019-10-13 19:43:03,542 INFO L226 Difference]: Without dead ends: 551 [2019-10-13 19:43:03,542 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-10-13 19:43:03,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2019-10-13 19:43:03,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 545. [2019-10-13 19:43:03,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 545 states. [2019-10-13 19:43:03,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 842 transitions. [2019-10-13 19:43:03,558 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 842 transitions. Word has length 44 [2019-10-13 19:43:03,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:03,558 INFO L462 AbstractCegarLoop]: Abstraction has 545 states and 842 transitions. [2019-10-13 19:43:03,558 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 19:43:03,558 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 842 transitions. [2019-10-13 19:43:03,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-13 19:43:03,559 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:03,559 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:03,762 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:03,763 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:03,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:03,766 INFO L82 PathProgramCache]: Analyzing trace with hash -447084202, now seen corresponding path program 1 times [2019-10-13 19:43:03,766 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:03,766 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546668662] [2019-10-13 19:43:03,767 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:03,767 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:03,767 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:03,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:03,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:03,821 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 19:43:03,822 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546668662] [2019-10-13 19:43:03,822 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:43:03,822 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:43:03,822 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43928243] [2019-10-13 19:43:03,823 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:43:03,823 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:03,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:43:03,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:43:03,825 INFO L87 Difference]: Start difference. First operand 545 states and 842 transitions. Second operand 4 states. [2019-10-13 19:43:04,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:04,026 INFO L93 Difference]: Finished difference Result 1053 states and 1621 transitions. [2019-10-13 19:43:04,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 19:43:04,027 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2019-10-13 19:43:04,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:04,030 INFO L225 Difference]: With dead ends: 1053 [2019-10-13 19:43:04,031 INFO L226 Difference]: Without dead ends: 557 [2019-10-13 19:43:04,032 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:43:04,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2019-10-13 19:43:04,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 555. [2019-10-13 19:43:04,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 555 states. [2019-10-13 19:43:04,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 835 transitions. [2019-10-13 19:43:04,048 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 835 transitions. Word has length 45 [2019-10-13 19:43:04,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:04,049 INFO L462 AbstractCegarLoop]: Abstraction has 555 states and 835 transitions. [2019-10-13 19:43:04,049 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:43:04,049 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 835 transitions. [2019-10-13 19:43:04,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-10-13 19:43:04,050 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:04,050 INFO L380 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:04,050 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:04,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:04,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1882634818, now seen corresponding path program 1 times [2019-10-13 19:43:04,051 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:04,051 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525580866] [2019-10-13 19:43:04,051 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:04,051 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:04,051 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:04,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:04,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:04,107 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-13 19:43:04,108 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525580866] [2019-10-13 19:43:04,108 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:43:04,108 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:43:04,108 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118045090] [2019-10-13 19:43:04,109 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:43:04,109 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:04,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:43:04,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:43:04,109 INFO L87 Difference]: Start difference. First operand 555 states and 835 transitions. Second operand 4 states. [2019-10-13 19:43:04,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:04,301 INFO L93 Difference]: Finished difference Result 799 states and 1202 transitions. [2019-10-13 19:43:04,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 19:43:04,309 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2019-10-13 19:43:04,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:04,311 INFO L225 Difference]: With dead ends: 799 [2019-10-13 19:43:04,311 INFO L226 Difference]: Without dead ends: 313 [2019-10-13 19:43:04,312 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:43:04,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2019-10-13 19:43:04,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 311. [2019-10-13 19:43:04,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2019-10-13 19:43:04,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 454 transitions. [2019-10-13 19:43:04,322 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 454 transitions. Word has length 55 [2019-10-13 19:43:04,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:04,322 INFO L462 AbstractCegarLoop]: Abstraction has 311 states and 454 transitions. [2019-10-13 19:43:04,323 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:43:04,323 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 454 transitions. [2019-10-13 19:43:04,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-13 19:43:04,323 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:04,324 INFO L380 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:04,324 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:04,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:04,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1573307774, now seen corresponding path program 1 times [2019-10-13 19:43:04,324 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:04,325 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418583979] [2019-10-13 19:43:04,325 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:04,325 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:04,325 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:04,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:04,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:04,394 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 23 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 19:43:04,395 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418583979] [2019-10-13 19:43:04,395 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450020] [2019-10-13 19:43:04,395 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:04,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:04,477 INFO L256 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 19:43:04,480 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:43:04,495 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 23 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 19:43:04,496 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:43:04,496 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2019-10-13 19:43:04,496 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500927337] [2019-10-13 19:43:04,497 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 19:43:04,497 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:04,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 19:43:04,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:43:04,497 INFO L87 Difference]: Start difference. First operand 311 states and 454 transitions. Second operand 6 states. [2019-10-13 19:43:05,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:05,164 INFO L93 Difference]: Finished difference Result 660 states and 968 transitions. [2019-10-13 19:43:05,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 19:43:05,165 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2019-10-13 19:43:05,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:05,168 INFO L225 Difference]: With dead ends: 660 [2019-10-13 19:43:05,168 INFO L226 Difference]: Without dead ends: 418 [2019-10-13 19:43:05,169 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-13 19:43:05,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2019-10-13 19:43:05,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 389. [2019-10-13 19:43:05,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 389 states. [2019-10-13 19:43:05,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 573 transitions. [2019-10-13 19:43:05,182 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 573 transitions. Word has length 56 [2019-10-13 19:43:05,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:05,182 INFO L462 AbstractCegarLoop]: Abstraction has 389 states and 573 transitions. [2019-10-13 19:43:05,182 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 19:43:05,182 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 573 transitions. [2019-10-13 19:43:05,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-13 19:43:05,183 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:05,183 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:05,394 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:05,395 INFO L410 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:05,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:05,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1831473212, now seen corresponding path program 1 times [2019-10-13 19:43:05,395 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:05,395 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033435825] [2019-10-13 19:43:05,395 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:05,396 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:05,396 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:05,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:05,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:05,518 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 19:43:05,518 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033435825] [2019-10-13 19:43:05,518 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299160515] [2019-10-13 19:43:05,518 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:05,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:05,605 INFO L256 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-13 19:43:05,607 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:43:05,642 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 19:43:05,643 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:43:05,643 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2019-10-13 19:43:05,643 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638380082] [2019-10-13 19:43:05,643 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 19:43:05,643 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:05,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 19:43:05,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:43:05,644 INFO L87 Difference]: Start difference. First operand 389 states and 573 transitions. Second operand 6 states. [2019-10-13 19:43:06,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:06,195 INFO L93 Difference]: Finished difference Result 436 states and 639 transitions. [2019-10-13 19:43:06,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 19:43:06,196 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2019-10-13 19:43:06,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:06,198 INFO L225 Difference]: With dead ends: 436 [2019-10-13 19:43:06,198 INFO L226 Difference]: Without dead ends: 430 [2019-10-13 19:43:06,199 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-10-13 19:43:06,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2019-10-13 19:43:06,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 427. [2019-10-13 19:43:06,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2019-10-13 19:43:06,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 627 transitions. [2019-10-13 19:43:06,212 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 627 transitions. Word has length 56 [2019-10-13 19:43:06,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:06,212 INFO L462 AbstractCegarLoop]: Abstraction has 427 states and 627 transitions. [2019-10-13 19:43:06,212 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 19:43:06,212 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 627 transitions. [2019-10-13 19:43:06,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-10-13 19:43:06,213 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:06,213 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:06,416 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:06,417 INFO L410 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:06,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:06,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1104488738, now seen corresponding path program 1 times [2019-10-13 19:43:06,417 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:06,418 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121664761] [2019-10-13 19:43:06,418 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:06,418 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:06,418 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:06,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:06,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:06,645 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:43:06,646 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121664761] [2019-10-13 19:43:06,646 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441396617] [2019-10-13 19:43:06,646 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:06,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:06,741 INFO L256 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-13 19:43:06,743 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:43:06,813 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:43:06,813 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:43:06,813 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2019-10-13 19:43:06,814 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431974426] [2019-10-13 19:43:06,814 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 19:43:06,814 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:06,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 19:43:06,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2019-10-13 19:43:06,815 INFO L87 Difference]: Start difference. First operand 427 states and 627 transitions. Second operand 10 states. [2019-10-13 19:43:07,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:07,467 INFO L93 Difference]: Finished difference Result 429 states and 628 transitions. [2019-10-13 19:43:07,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 19:43:07,467 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2019-10-13 19:43:07,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:07,470 INFO L225 Difference]: With dead ends: 429 [2019-10-13 19:43:07,470 INFO L226 Difference]: Without dead ends: 427 [2019-10-13 19:43:07,470 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2019-10-13 19:43:07,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2019-10-13 19:43:07,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 427. [2019-10-13 19:43:07,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2019-10-13 19:43:07,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 626 transitions. [2019-10-13 19:43:07,483 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 626 transitions. Word has length 60 [2019-10-13 19:43:07,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:07,483 INFO L462 AbstractCegarLoop]: Abstraction has 427 states and 626 transitions. [2019-10-13 19:43:07,483 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 19:43:07,483 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 626 transitions. [2019-10-13 19:43:07,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-10-13 19:43:07,484 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:07,484 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 5, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:07,689 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:07,689 INFO L410 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:07,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:07,690 INFO L82 PathProgramCache]: Analyzing trace with hash 855434068, now seen corresponding path program 1 times [2019-10-13 19:43:07,690 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:07,690 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583072851] [2019-10-13 19:43:07,690 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:07,690 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:07,690 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:07,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:08,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:08,160 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 15 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:43:08,161 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583072851] [2019-10-13 19:43:08,161 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806216837] [2019-10-13 19:43:08,161 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:08,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:08,252 INFO L256 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-13 19:43:08,255 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:43:08,336 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 15 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:43:08,336 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:43:08,337 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 12 [2019-10-13 19:43:08,337 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136380282] [2019-10-13 19:43:08,339 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 19:43:08,339 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:08,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 19:43:08,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-10-13 19:43:08,340 INFO L87 Difference]: Start difference. First operand 427 states and 626 transitions. Second operand 12 states. [2019-10-13 19:43:10,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:10,074 INFO L93 Difference]: Finished difference Result 455 states and 652 transitions. [2019-10-13 19:43:10,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-13 19:43:10,075 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 67 [2019-10-13 19:43:10,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:10,077 INFO L225 Difference]: With dead ends: 455 [2019-10-13 19:43:10,077 INFO L226 Difference]: Without dead ends: 453 [2019-10-13 19:43:10,078 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2019-10-13 19:43:10,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2019-10-13 19:43:10,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 428. [2019-10-13 19:43:10,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 428 states. [2019-10-13 19:43:10,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 627 transitions. [2019-10-13 19:43:10,092 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 627 transitions. Word has length 67 [2019-10-13 19:43:10,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:10,092 INFO L462 AbstractCegarLoop]: Abstraction has 428 states and 627 transitions. [2019-10-13 19:43:10,092 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 19:43:10,092 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 627 transitions. [2019-10-13 19:43:10,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-10-13 19:43:10,093 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:10,093 INFO L380 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:10,297 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:10,298 INFO L410 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:10,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:10,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1201928326, now seen corresponding path program 1 times [2019-10-13 19:43:10,298 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:10,299 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410304537] [2019-10-13 19:43:10,299 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:10,299 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:10,299 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:10,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:10,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:10,380 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 38 proven. 50 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 19:43:10,380 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410304537] [2019-10-13 19:43:10,380 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291446434] [2019-10-13 19:43:10,380 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:10,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:10,495 INFO L256 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 19:43:10,497 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:43:10,509 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 38 proven. 50 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 19:43:10,509 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:43:10,510 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2019-10-13 19:43:10,510 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288420239] [2019-10-13 19:43:10,510 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 19:43:10,511 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:10,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 19:43:10,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 19:43:10,511 INFO L87 Difference]: Start difference. First operand 428 states and 627 transitions. Second operand 7 states. [2019-10-13 19:43:11,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:11,482 INFO L93 Difference]: Finished difference Result 865 states and 1269 transitions. [2019-10-13 19:43:11,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 19:43:11,483 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 77 [2019-10-13 19:43:11,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:11,485 INFO L225 Difference]: With dead ends: 865 [2019-10-13 19:43:11,485 INFO L226 Difference]: Without dead ends: 545 [2019-10-13 19:43:11,486 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-10-13 19:43:11,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2019-10-13 19:43:11,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 506. [2019-10-13 19:43:11,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 506 states. [2019-10-13 19:43:11,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 746 transitions. [2019-10-13 19:43:11,502 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 746 transitions. Word has length 77 [2019-10-13 19:43:11,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:11,503 INFO L462 AbstractCegarLoop]: Abstraction has 506 states and 746 transitions. [2019-10-13 19:43:11,503 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 19:43:11,503 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 746 transitions. [2019-10-13 19:43:11,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-10-13 19:43:11,504 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:11,504 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:11,713 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:11,714 INFO L410 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:11,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:11,715 INFO L82 PathProgramCache]: Analyzing trace with hash 808901316, now seen corresponding path program 1 times [2019-10-13 19:43:11,715 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:11,715 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179773626] [2019-10-13 19:43:11,715 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:11,716 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:11,716 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:11,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:11,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:12,004 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 18 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:43:12,004 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179773626] [2019-10-13 19:43:12,005 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704283490] [2019-10-13 19:43:12,005 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:12,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:12,143 INFO L256 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-13 19:43:12,145 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:43:12,224 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:43:12,272 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 18 proven. 70 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 19:43:12,272 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:43:12,272 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 14 [2019-10-13 19:43:12,273 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523991133] [2019-10-13 19:43:12,273 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 19:43:12,273 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:12,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 19:43:12,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2019-10-13 19:43:12,274 INFO L87 Difference]: Start difference. First operand 506 states and 746 transitions. Second operand 14 states. [2019-10-13 19:43:13,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:13,741 INFO L93 Difference]: Finished difference Result 529 states and 778 transitions. [2019-10-13 19:43:13,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 19:43:13,742 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 77 [2019-10-13 19:43:13,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:13,744 INFO L225 Difference]: With dead ends: 529 [2019-10-13 19:43:13,744 INFO L226 Difference]: Without dead ends: 525 [2019-10-13 19:43:13,745 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2019-10-13 19:43:13,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2019-10-13 19:43:13,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 525. [2019-10-13 19:43:13,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 525 states. [2019-10-13 19:43:13,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 772 transitions. [2019-10-13 19:43:13,761 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 772 transitions. Word has length 77 [2019-10-13 19:43:13,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:13,762 INFO L462 AbstractCegarLoop]: Abstraction has 525 states and 772 transitions. [2019-10-13 19:43:13,762 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 19:43:13,762 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 772 transitions. [2019-10-13 19:43:13,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-10-13 19:43:13,763 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:13,763 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 7, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:13,966 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:13,967 INFO L410 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:13,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:13,968 INFO L82 PathProgramCache]: Analyzing trace with hash 704934839, now seen corresponding path program 1 times [2019-10-13 19:43:13,968 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:13,968 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292452706] [2019-10-13 19:43:13,969 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:13,969 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:13,969 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:13,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:14,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:14,206 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 26 proven. 99 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-13 19:43:14,206 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292452706] [2019-10-13 19:43:14,206 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077904035] [2019-10-13 19:43:14,206 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:14,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:14,297 INFO L256 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-13 19:43:14,298 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:43:14,352 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 21 proven. 99 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 19:43:14,352 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:43:14,353 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2019-10-13 19:43:14,353 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091122174] [2019-10-13 19:43:14,354 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 19:43:14,354 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:14,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 19:43:14,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-10-13 19:43:14,354 INFO L87 Difference]: Start difference. First operand 525 states and 772 transitions. Second operand 10 states. [2019-10-13 19:43:15,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:15,395 INFO L93 Difference]: Finished difference Result 555 states and 810 transitions. [2019-10-13 19:43:15,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 19:43:15,398 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 87 [2019-10-13 19:43:15,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:15,400 INFO L225 Difference]: With dead ends: 555 [2019-10-13 19:43:15,400 INFO L226 Difference]: Without dead ends: 551 [2019-10-13 19:43:15,401 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2019-10-13 19:43:15,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2019-10-13 19:43:15,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 544. [2019-10-13 19:43:15,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2019-10-13 19:43:15,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 798 transitions. [2019-10-13 19:43:15,419 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 798 transitions. Word has length 87 [2019-10-13 19:43:15,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:15,419 INFO L462 AbstractCegarLoop]: Abstraction has 544 states and 798 transitions. [2019-10-13 19:43:15,419 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 19:43:15,419 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 798 transitions. [2019-10-13 19:43:15,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-10-13 19:43:15,420 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:15,420 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 7, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:15,629 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:15,630 INFO L410 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:15,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:15,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1100197245, now seen corresponding path program 1 times [2019-10-13 19:43:15,630 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:15,630 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980459413] [2019-10-13 19:43:15,630 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:15,630 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:15,631 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:15,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:15,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:15,954 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:43:15,955 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980459413] [2019-10-13 19:43:15,955 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434785602] [2019-10-13 19:43:15,955 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:16,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:16,068 INFO L256 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-13 19:43:16,070 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:43:16,149 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:43:16,189 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 21 proven. 110 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 19:43:16,189 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:43:16,190 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2019-10-13 19:43:16,190 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003524258] [2019-10-13 19:43:16,190 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 19:43:16,190 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:16,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 19:43:16,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2019-10-13 19:43:16,191 INFO L87 Difference]: Start difference. First operand 544 states and 798 transitions. Second operand 14 states. [2019-10-13 19:43:17,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:17,608 INFO L93 Difference]: Finished difference Result 547 states and 801 transitions. [2019-10-13 19:43:17,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 19:43:17,609 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 90 [2019-10-13 19:43:17,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:17,611 INFO L225 Difference]: With dead ends: 547 [2019-10-13 19:43:17,611 INFO L226 Difference]: Without dead ends: 545 [2019-10-13 19:43:17,612 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 94 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2019-10-13 19:43:17,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2019-10-13 19:43:17,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 545. [2019-10-13 19:43:17,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 545 states. [2019-10-13 19:43:17,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 799 transitions. [2019-10-13 19:43:17,627 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 799 transitions. Word has length 90 [2019-10-13 19:43:17,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:17,628 INFO L462 AbstractCegarLoop]: Abstraction has 545 states and 799 transitions. [2019-10-13 19:43:17,628 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 19:43:17,628 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 799 transitions. [2019-10-13 19:43:17,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-10-13 19:43:17,629 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:17,629 INFO L380 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:17,833 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:17,833 INFO L410 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:17,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:17,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1191267151, now seen corresponding path program 1 times [2019-10-13 19:43:17,833 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:17,833 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373848416] [2019-10-13 19:43:17,834 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:17,834 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:17,834 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:17,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:17,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:17,940 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 54 proven. 118 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 19:43:17,940 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373848416] [2019-10-13 19:43:17,940 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121401697] [2019-10-13 19:43:17,940 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:18,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:18,049 INFO L256 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 19:43:18,051 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:43:18,061 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 54 proven. 118 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 19:43:18,061 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:43:18,061 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2019-10-13 19:43:18,062 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356714082] [2019-10-13 19:43:18,062 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 19:43:18,062 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:18,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 19:43:18,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-13 19:43:18,062 INFO L87 Difference]: Start difference. First operand 545 states and 799 transitions. Second operand 8 states. [2019-10-13 19:43:19,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:19,240 INFO L93 Difference]: Finished difference Result 1070 states and 1569 transitions. [2019-10-13 19:43:19,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 19:43:19,240 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 102 [2019-10-13 19:43:19,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:19,245 INFO L225 Difference]: With dead ends: 1070 [2019-10-13 19:43:19,245 INFO L226 Difference]: Without dead ends: 672 [2019-10-13 19:43:19,246 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2019-10-13 19:43:19,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2019-10-13 19:43:19,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 623. [2019-10-13 19:43:19,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 623 states. [2019-10-13 19:43:19,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 918 transitions. [2019-10-13 19:43:19,264 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 918 transitions. Word has length 102 [2019-10-13 19:43:19,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:19,265 INFO L462 AbstractCegarLoop]: Abstraction has 623 states and 918 transitions. [2019-10-13 19:43:19,265 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 19:43:19,265 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 918 transitions. [2019-10-13 19:43:19,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-10-13 19:43:19,266 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:19,266 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 8, 6, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:19,470 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:19,470 INFO L410 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:19,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:19,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1449432589, now seen corresponding path program 1 times [2019-10-13 19:43:19,471 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:19,471 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926447239] [2019-10-13 19:43:19,471 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:19,471 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:19,472 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:19,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:19,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:19,657 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 24 proven. 148 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 19:43:19,658 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926447239] [2019-10-13 19:43:19,658 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143629284] [2019-10-13 19:43:19,659 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:19,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:19,776 INFO L256 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-13 19:43:19,777 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:43:19,811 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 24 proven. 148 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 19:43:19,812 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:43:19,812 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2019-10-13 19:43:19,812 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402957925] [2019-10-13 19:43:19,814 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 19:43:19,816 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:19,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 19:43:19,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-10-13 19:43:19,822 INFO L87 Difference]: Start difference. First operand 623 states and 918 transitions. Second operand 8 states. [2019-10-13 19:43:20,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:20,881 INFO L93 Difference]: Finished difference Result 670 states and 984 transitions. [2019-10-13 19:43:20,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 19:43:20,882 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 102 [2019-10-13 19:43:20,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:20,884 INFO L225 Difference]: With dead ends: 670 [2019-10-13 19:43:20,884 INFO L226 Difference]: Without dead ends: 664 [2019-10-13 19:43:20,885 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-10-13 19:43:20,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2019-10-13 19:43:20,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 661. [2019-10-13 19:43:20,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 661 states. [2019-10-13 19:43:20,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 972 transitions. [2019-10-13 19:43:20,903 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 972 transitions. Word has length 102 [2019-10-13 19:43:20,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:20,903 INFO L462 AbstractCegarLoop]: Abstraction has 661 states and 972 transitions. [2019-10-13 19:43:20,904 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 19:43:20,904 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 972 transitions. [2019-10-13 19:43:20,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-10-13 19:43:20,905 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:20,905 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 8, 6, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:21,109 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:21,109 INFO L410 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:21,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:21,110 INFO L82 PathProgramCache]: Analyzing trace with hash -669250513, now seen corresponding path program 1 times [2019-10-13 19:43:21,110 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:21,110 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534693595] [2019-10-13 19:43:21,111 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:21,111 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:21,111 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:21,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:21,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:21,415 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 24 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:43:21,416 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534693595] [2019-10-13 19:43:21,416 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839218015] [2019-10-13 19:43:21,416 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:21,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:21,531 INFO L256 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-13 19:43:21,533 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:43:21,624 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:43:21,692 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 24 proven. 160 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 19:43:21,693 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:43:21,693 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2019-10-13 19:43:21,693 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981769314] [2019-10-13 19:43:21,694 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-13 19:43:21,694 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:21,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-13 19:43:21,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2019-10-13 19:43:21,695 INFO L87 Difference]: Start difference. First operand 661 states and 972 transitions. Second operand 16 states. [2019-10-13 19:43:23,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:23,793 INFO L93 Difference]: Finished difference Result 663 states and 973 transitions. [2019-10-13 19:43:23,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 19:43:23,794 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 106 [2019-10-13 19:43:23,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:23,797 INFO L225 Difference]: With dead ends: 663 [2019-10-13 19:43:23,797 INFO L226 Difference]: Without dead ends: 661 [2019-10-13 19:43:23,797 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 110 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2019-10-13 19:43:23,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2019-10-13 19:43:23,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 661. [2019-10-13 19:43:23,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 661 states. [2019-10-13 19:43:23,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 971 transitions. [2019-10-13 19:43:23,815 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 971 transitions. Word has length 106 [2019-10-13 19:43:23,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:23,815 INFO L462 AbstractCegarLoop]: Abstraction has 661 states and 971 transitions. [2019-10-13 19:43:23,815 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-13 19:43:23,815 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 971 transitions. [2019-10-13 19:43:23,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-10-13 19:43:23,816 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:23,817 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 9, 6, 6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:24,021 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:24,021 INFO L410 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:24,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:24,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1267384093, now seen corresponding path program 2 times [2019-10-13 19:43:24,022 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:24,022 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132834377] [2019-10-13 19:43:24,023 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:24,023 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:24,023 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:24,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:24,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:24,529 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 27 proven. 208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:43:24,529 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132834377] [2019-10-13 19:43:24,529 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626175709] [2019-10-13 19:43:24,529 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:24,652 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:43:24,653 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:43:24,655 INFO L256 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 32 conjunts are in the unsatisfiable core [2019-10-13 19:43:24,657 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:43:24,750 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:43:24,845 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 27 proven. 198 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 19:43:24,845 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:43:24,845 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2019-10-13 19:43:24,845 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863777270] [2019-10-13 19:43:24,846 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-13 19:43:24,846 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:24,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-13 19:43:24,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2019-10-13 19:43:24,846 INFO L87 Difference]: Start difference. First operand 661 states and 971 transitions. Second operand 20 states. [2019-10-13 19:43:27,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:27,821 INFO L93 Difference]: Finished difference Result 702 states and 1010 transitions. [2019-10-13 19:43:27,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-13 19:43:27,821 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 113 [2019-10-13 19:43:27,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:27,823 INFO L225 Difference]: With dead ends: 702 [2019-10-13 19:43:27,823 INFO L226 Difference]: Without dead ends: 700 [2019-10-13 19:43:27,824 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 118 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=228, Invalid=1664, Unknown=0, NotChecked=0, Total=1892 [2019-10-13 19:43:27,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2019-10-13 19:43:27,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 662. [2019-10-13 19:43:27,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 662 states. [2019-10-13 19:43:27,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 972 transitions. [2019-10-13 19:43:27,844 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 972 transitions. Word has length 113 [2019-10-13 19:43:27,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:27,845 INFO L462 AbstractCegarLoop]: Abstraction has 662 states and 972 transitions. [2019-10-13 19:43:27,845 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-13 19:43:27,845 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 972 transitions. [2019-10-13 19:43:27,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-13 19:43:27,846 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:27,846 INFO L380 BasicCegarLoop]: trace histogram [11, 10, 10, 7, 7, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:28,051 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:28,051 INFO L410 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:28,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:28,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1815351467, now seen corresponding path program 2 times [2019-10-13 19:43:28,052 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:28,052 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919491404] [2019-10-13 19:43:28,052 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:28,052 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:28,052 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:28,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:28,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:28,193 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 68 proven. 206 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 19:43:28,193 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919491404] [2019-10-13 19:43:28,193 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327382816] [2019-10-13 19:43:28,194 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:28,334 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:43:28,335 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:43:28,337 INFO L256 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 19:43:28,340 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:43:28,371 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 68 proven. 206 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 19:43:28,372 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:43:28,372 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2019-10-13 19:43:28,372 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773016591] [2019-10-13 19:43:28,373 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 19:43:28,373 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:28,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 19:43:28,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-13 19:43:28,373 INFO L87 Difference]: Start difference. First operand 662 states and 972 transitions. Second operand 9 states. [2019-10-13 19:43:29,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:29,837 INFO L93 Difference]: Finished difference Result 1275 states and 1870 transitions. [2019-10-13 19:43:29,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 19:43:29,837 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 123 [2019-10-13 19:43:29,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:29,842 INFO L225 Difference]: With dead ends: 1275 [2019-10-13 19:43:29,842 INFO L226 Difference]: Without dead ends: 799 [2019-10-13 19:43:29,843 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2019-10-13 19:43:29,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2019-10-13 19:43:29,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 740. [2019-10-13 19:43:29,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 740 states. [2019-10-13 19:43:29,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1091 transitions. [2019-10-13 19:43:29,869 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1091 transitions. Word has length 123 [2019-10-13 19:43:29,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:29,869 INFO L462 AbstractCegarLoop]: Abstraction has 740 states and 1091 transitions. [2019-10-13 19:43:29,869 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 19:43:29,870 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1091 transitions. [2019-10-13 19:43:29,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-13 19:43:29,870 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:29,871 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 10, 7, 7, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:43:30,075 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:30,075 INFO L410 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:30,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:30,076 INFO L82 PathProgramCache]: Analyzing trace with hash 2086588819, now seen corresponding path program 2 times [2019-10-13 19:43:30,076 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:30,076 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070529605] [2019-10-13 19:43:30,076 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:30,076 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:30,076 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:30,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat