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/reducercommutativity/sum20-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:43:18,647 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:43:18,649 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:43:18,667 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:43:18,667 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:43:18,669 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:43:18,671 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:43:18,682 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:43:18,685 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:43:18,688 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:43:18,690 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:43:18,692 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:43:18,692 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:43:18,694 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:43:18,697 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:43:18,698 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:43:18,700 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:43:18,701 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:43:18,702 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:43:18,707 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:43:18,711 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:43:18,712 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:43:18,713 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:43:18,714 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:43:18,717 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:43:18,722 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:43:18,724 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:43:18,724 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:43:18,725 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:43:18,726 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:43:18,727 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:43:18,727 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:43:18,728 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:43:18,728 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:43:18,729 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:43:18,730 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:43:18,731 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 [2019-10-14 23:43:18,754 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:43:18,754 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:43:18,755 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:43:18,755 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:43:18,755 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:43:18,756 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:43:18,756 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:43:18,756 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:43:18,756 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:43:18,757 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:43:18,757 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:43:18,757 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:43:18,757 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:43:18,757 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:43:18,758 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:43:18,758 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:43:18,758 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:43:18,758 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:43:18,758 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:43:18,759 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:43:18,759 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:43:18,759 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:43:18,759 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:43:18,760 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:43:18,760 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:43:18,760 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:43:18,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:43:18,760 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:43:18,761 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:43:19,117 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:43:19,134 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:43:19,138 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:43:19,139 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:43:19,140 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:43:19,141 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sum20-2.i [2019-10-14 23:43:19,216 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f660e7b2b/d60df8dfa55543cfa309c4d7a3cbdfb5/FLAG787370859 [2019-10-14 23:43:19,651 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:43:19,651 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sum20-2.i [2019-10-14 23:43:19,657 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f660e7b2b/d60df8dfa55543cfa309c4d7a3cbdfb5/FLAG787370859 [2019-10-14 23:43:20,055 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f660e7b2b/d60df8dfa55543cfa309c4d7a3cbdfb5 [2019-10-14 23:43:20,065 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:43:20,067 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:43:20,068 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:43:20,068 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:43:20,073 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:43:20,074 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:43:20" (1/1) ... [2019-10-14 23:43:20,077 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@209cf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:43:20, skipping insertion in model container [2019-10-14 23:43:20,077 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:43:20" (1/1) ... [2019-10-14 23:43:20,086 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:43:20,105 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:43:20,360 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:43:20,376 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:43:20,417 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:43:20,510 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:43:20,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:43:20 WrapperNode [2019-10-14 23:43:20,513 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:43:20,514 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:43:20,514 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:43:20,514 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:43:20,526 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:43:20" (1/1) ... [2019-10-14 23:43:20,526 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:43:20" (1/1) ... [2019-10-14 23:43:20,534 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:43:20" (1/1) ... [2019-10-14 23:43:20,535 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:43:20" (1/1) ... [2019-10-14 23:43:20,551 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:43:20" (1/1) ... [2019-10-14 23:43:20,556 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:43:20" (1/1) ... [2019-10-14 23:43:20,557 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:43:20" (1/1) ... [2019-10-14 23:43:20,560 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:43:20,560 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:43:20,560 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:43:20,560 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:43:20,561 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:43:20" (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 [2019-10-14 23:43:20,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:43:20,620 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:43:20,620 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2019-10-14 23:43:20,620 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:43:20,620 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:43:20,620 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:43:20,620 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2019-10-14 23:43:20,620 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 23:43:20,621 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:43:20,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 23:43:20,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 23:43:20,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 23:43:20,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:43:20,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:43:20,956 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:43:20,956 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-14 23:43:20,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:43:20 BoogieIcfgContainer [2019-10-14 23:43:20,957 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:43:20,959 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:43:20,959 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:43:20,962 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:43:20,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:43:20" (1/3) ... [2019-10-14 23:43:20,963 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c796080 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:43:20, skipping insertion in model container [2019-10-14 23:43:20,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:43:20" (2/3) ... [2019-10-14 23:43:20,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c796080 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:43:20, skipping insertion in model container [2019-10-14 23:43:20,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:43:20" (3/3) ... [2019-10-14 23:43:20,966 INFO L109 eAbstractionObserver]: Analyzing ICFG sum20-2.i [2019-10-14 23:43:20,974 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:43:20,982 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:43:20,994 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:43:21,021 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:43:21,021 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:43:21,021 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:43:21,022 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:43:21,022 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:43:21,022 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:43:21,022 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:43:21,022 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:43:21,038 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2019-10-14 23:43:21,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 23:43:21,045 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:21,046 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:21,048 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:21,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:21,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1461178031, now seen corresponding path program 1 times [2019-10-14 23:43:21,059 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:21,059 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059644150] [2019-10-14 23:43:21,060 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:21,060 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:21,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:21,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:21,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:21,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:21,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:21,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:21,261 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 23:43:21,262 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059644150] [2019-10-14 23:43:21,263 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:43:21,263 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:43:21,264 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866715806] [2019-10-14 23:43:21,268 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:43:21,269 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:21,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:43:21,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:43:21,282 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2019-10-14 23:43:21,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:21,405 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2019-10-14 23:43:21,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:43:21,407 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-10-14 23:43:21,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:21,417 INFO L225 Difference]: With dead ends: 54 [2019-10-14 23:43:21,418 INFO L226 Difference]: Without dead ends: 26 [2019-10-14 23:43:21,428 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:43:21,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-14 23:43:21,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-14 23:43:21,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-14 23:43:21,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-10-14 23:43:21,478 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 32 [2019-10-14 23:43:21,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:21,479 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-10-14 23:43:21,479 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:43:21,480 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-10-14 23:43:21,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 23:43:21,482 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:21,482 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:21,483 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:21,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:21,483 INFO L82 PathProgramCache]: Analyzing trace with hash -595992629, now seen corresponding path program 1 times [2019-10-14 23:43:21,484 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:21,484 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552194991] [2019-10-14 23:43:21,485 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:21,485 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:21,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:21,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:21,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:21,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:21,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:21,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:21,691 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 23:43:21,692 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552194991] [2019-10-14 23:43:21,692 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405831362] [2019-10-14 23:43:21,692 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 [2019-10-14 23:43:21,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:21,762 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-14 23:43:21,770 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:21,807 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 23:43:21,808 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:43:21,808 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-14 23:43:21,808 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115410011] [2019-10-14 23:43:21,810 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:43:21,811 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:21,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:43:21,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:43:21,812 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 3 states. [2019-10-14 23:43:21,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:21,828 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2019-10-14 23:43:21,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:43:21,829 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-10-14 23:43:21,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:21,830 INFO L225 Difference]: With dead ends: 46 [2019-10-14 23:43:21,830 INFO L226 Difference]: Without dead ends: 28 [2019-10-14 23:43:21,831 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:43:21,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-14 23:43:21,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-10-14 23:43:21,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-14 23:43:21,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-10-14 23:43:21,841 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 32 [2019-10-14 23:43:21,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:21,841 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-10-14 23:43:21,842 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:43:21,843 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-10-14 23:43:21,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-14 23:43:21,845 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:21,845 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:22,045 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:22,046 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:22,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:22,048 INFO L82 PathProgramCache]: Analyzing trace with hash 169606189, now seen corresponding path program 1 times [2019-10-14 23:43:22,048 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:22,049 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860037710] [2019-10-14 23:43:22,049 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:22,049 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:22,049 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:22,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:22,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:22,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:22,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:22,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:22,190 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 23:43:22,190 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860037710] [2019-10-14 23:43:22,191 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20706032] [2019-10-14 23:43:22,191 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 [2019-10-14 23:43:22,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:22,262 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-14 23:43:22,265 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:22,271 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 23:43:22,271 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:43:22,272 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2019-10-14 23:43:22,272 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56053354] [2019-10-14 23:43:22,272 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:43:22,273 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:22,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:43:22,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:43:22,274 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2019-10-14 23:43:22,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:22,294 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2019-10-14 23:43:22,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:43:22,295 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2019-10-14 23:43:22,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:22,296 INFO L225 Difference]: With dead ends: 46 [2019-10-14 23:43:22,296 INFO L226 Difference]: Without dead ends: 29 [2019-10-14 23:43:22,297 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:43:22,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-14 23:43:22,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-10-14 23:43:22,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-14 23:43:22,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-10-14 23:43:22,306 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2019-10-14 23:43:22,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:22,307 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-10-14 23:43:22,307 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:43:22,307 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-10-14 23:43:22,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-14 23:43:22,311 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:22,312 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:22,517 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:22,518 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:22,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:22,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1462689141, now seen corresponding path program 1 times [2019-10-14 23:43:22,519 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:22,519 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682781660] [2019-10-14 23:43:22,520 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:22,520 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:22,520 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:22,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:22,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:22,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:22,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:22,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:22,683 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-14 23:43:22,684 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682781660] [2019-10-14 23:43:22,684 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051582480] [2019-10-14 23:43:22,684 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 [2019-10-14 23:43:22,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:22,759 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-14 23:43:22,766 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:22,789 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-14 23:43:22,790 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:43:22,790 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 23:43:22,791 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525843347] [2019-10-14 23:43:22,791 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:43:22,792 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:22,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:43:22,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:43:22,793 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 3 states. [2019-10-14 23:43:22,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:22,817 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2019-10-14 23:43:22,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:43:22,818 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2019-10-14 23:43:22,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:22,819 INFO L225 Difference]: With dead ends: 43 [2019-10-14 23:43:22,820 INFO L226 Difference]: Without dead ends: 30 [2019-10-14 23:43:22,820 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:43:22,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-14 23:43:22,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-10-14 23:43:22,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-14 23:43:22,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-10-14 23:43:22,832 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 40 [2019-10-14 23:43:22,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:22,839 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-10-14 23:43:22,839 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:43:22,839 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-10-14 23:43:22,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-14 23:43:22,841 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:22,841 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:23,046 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:23,047 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:23,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:23,048 INFO L82 PathProgramCache]: Analyzing trace with hash -233991671, now seen corresponding path program 1 times [2019-10-14 23:43:23,048 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:23,049 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868973073] [2019-10-14 23:43:23,049 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:23,049 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:23,050 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:23,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:23,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:23,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:23,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:23,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:23,197 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-14 23:43:23,197 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868973073] [2019-10-14 23:43:23,198 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655421610] [2019-10-14 23:43:23,198 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 [2019-10-14 23:43:23,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:23,267 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:43:23,273 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:23,302 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-14 23:43:23,303 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:23,303 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2019-10-14 23:43:23,303 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630986368] [2019-10-14 23:43:23,307 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 23:43:23,307 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:23,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 23:43:23,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:43:23,308 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 8 states. [2019-10-14 23:43:23,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:23,485 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2019-10-14 23:43:23,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:43:23,487 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2019-10-14 23:43:23,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:23,487 INFO L225 Difference]: With dead ends: 55 [2019-10-14 23:43:23,488 INFO L226 Difference]: Without dead ends: 35 [2019-10-14 23:43:23,488 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:43:23,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-14 23:43:23,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-10-14 23:43:23,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-14 23:43:23,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-10-14 23:43:23,495 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 42 [2019-10-14 23:43:23,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:23,496 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-10-14 23:43:23,496 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 23:43:23,496 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-10-14 23:43:23,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-14 23:43:23,497 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:23,497 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 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] [2019-10-14 23:43:23,698 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:23,699 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:23,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:23,700 INFO L82 PathProgramCache]: Analyzing trace with hash -52274487, now seen corresponding path program 2 times [2019-10-14 23:43:23,700 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:23,700 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731996073] [2019-10-14 23:43:23,701 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:23,701 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:23,701 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:23,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:23,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:23,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:23,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:23,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:23,794 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-14 23:43:23,794 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731996073] [2019-10-14 23:43:23,795 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374905149] [2019-10-14 23:43:23,795 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 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 [2019-10-14 23:43:23,857 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:43:23,858 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:23,859 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:43:23,862 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:23,887 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-14 23:43:23,887 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:23,887 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 23:43:23,888 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196083102] [2019-10-14 23:43:23,888 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:43:23,889 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:23,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:43:23,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:43:23,889 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2019-10-14 23:43:24,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:24,004 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2019-10-14 23:43:24,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:43:24,004 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2019-10-14 23:43:24,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:24,005 INFO L225 Difference]: With dead ends: 58 [2019-10-14 23:43:24,006 INFO L226 Difference]: Without dead ends: 36 [2019-10-14 23:43:24,009 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:43:24,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-14 23:43:24,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-10-14 23:43:24,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-14 23:43:24,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2019-10-14 23:43:24,020 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 50 [2019-10-14 23:43:24,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:24,020 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2019-10-14 23:43:24,020 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:43:24,020 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2019-10-14 23:43:24,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-14 23:43:24,022 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:24,022 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:24,226 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:24,227 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:24,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:24,228 INFO L82 PathProgramCache]: Analyzing trace with hash 602858155, now seen corresponding path program 3 times [2019-10-14 23:43:24,228 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:24,228 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764150176] [2019-10-14 23:43:24,229 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:24,229 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:24,229 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:24,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:24,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:24,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:24,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:24,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:24,341 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-14 23:43:24,341 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764150176] [2019-10-14 23:43:24,342 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173594448] [2019-10-14 23:43:24,342 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-10-14 23:43:24,399 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 23:43:24,399 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:24,400 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:43:24,413 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:24,443 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-10-14 23:43:24,444 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:24,444 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2019-10-14 23:43:24,444 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847846545] [2019-10-14 23:43:24,445 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:43:24,445 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:24,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:43:24,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:43:24,447 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 9 states. [2019-10-14 23:43:24,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:24,568 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2019-10-14 23:43:24,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:43:24,569 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 52 [2019-10-14 23:43:24,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:24,570 INFO L225 Difference]: With dead ends: 63 [2019-10-14 23:43:24,570 INFO L226 Difference]: Without dead ends: 41 [2019-10-14 23:43:24,571 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:43:24,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-14 23:43:24,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-10-14 23:43:24,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-14 23:43:24,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2019-10-14 23:43:24,578 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 52 [2019-10-14 23:43:24,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:24,578 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2019-10-14 23:43:24,578 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:43:24,578 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2019-10-14 23:43:24,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-14 23:43:24,579 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:24,580 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:24,784 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:24,784 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:24,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:24,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1804278027, now seen corresponding path program 4 times [2019-10-14 23:43:24,785 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:24,785 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780872056] [2019-10-14 23:43:24,785 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:24,785 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:24,785 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:24,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:24,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:24,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:24,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:24,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:24,884 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-14 23:43:24,885 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780872056] [2019-10-14 23:43:24,885 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921864593] [2019-10-14 23:43:24,886 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2019-10-14 23:43:24,951 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:43:24,951 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:24,952 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:43:24,962 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:24,995 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-14 23:43:24,998 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:24,999 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-14 23:43:24,999 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669204056] [2019-10-14 23:43:25,000 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:43:25,000 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:25,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:43:25,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:43:25,001 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 9 states. [2019-10-14 23:43:25,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:25,122 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2019-10-14 23:43:25,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:43:25,122 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2019-10-14 23:43:25,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:25,123 INFO L225 Difference]: With dead ends: 66 [2019-10-14 23:43:25,123 INFO L226 Difference]: Without dead ends: 42 [2019-10-14 23:43:25,124 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:43:25,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-14 23:43:25,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-10-14 23:43:25,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-14 23:43:25,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2019-10-14 23:43:25,140 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 56 [2019-10-14 23:43:25,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:25,142 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2019-10-14 23:43:25,142 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:43:25,143 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2019-10-14 23:43:25,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-10-14 23:43:25,144 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:25,144 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:25,348 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:25,349 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:25,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:25,350 INFO L82 PathProgramCache]: Analyzing trace with hash 907456365, now seen corresponding path program 5 times [2019-10-14 23:43:25,350 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:25,350 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033099146] [2019-10-14 23:43:25,351 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:25,351 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:25,351 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:25,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:25,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:25,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:25,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:25,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:25,477 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-14 23:43:25,478 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033099146] [2019-10-14 23:43:25,478 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896600660] [2019-10-14 23:43:25,478 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2019-10-14 23:43:25,593 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-14 23:43:25,593 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:25,594 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:43:25,599 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:25,648 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-14 23:43:25,649 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:25,649 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-10-14 23:43:25,649 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576177924] [2019-10-14 23:43:25,650 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:43:25,650 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:25,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:43:25,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:43:25,651 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 12 states. [2019-10-14 23:43:25,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:25,802 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2019-10-14 23:43:25,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 23:43:25,802 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 58 [2019-10-14 23:43:25,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:25,803 INFO L225 Difference]: With dead ends: 71 [2019-10-14 23:43:25,803 INFO L226 Difference]: Without dead ends: 47 [2019-10-14 23:43:25,804 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:43:25,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-14 23:43:25,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2019-10-14 23:43:25,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-10-14 23:43:25,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2019-10-14 23:43:25,810 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 58 [2019-10-14 23:43:25,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:25,811 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2019-10-14 23:43:25,811 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:43:25,811 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2019-10-14 23:43:25,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-14 23:43:25,812 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:25,812 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:26,018 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:26,019 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:26,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:26,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1617233875, now seen corresponding path program 6 times [2019-10-14 23:43:26,019 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:26,019 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959744403] [2019-10-14 23:43:26,020 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:26,020 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:26,020 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:26,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:26,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:26,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:26,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:26,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:26,137 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2019-10-14 23:43:26,138 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959744403] [2019-10-14 23:43:26,138 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982839696] [2019-10-14 23:43:26,138 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-10-14 23:43:26,216 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-14 23:43:26,217 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:26,218 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 23:43:26,220 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:26,278 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 56 proven. 9 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2019-10-14 23:43:26,278 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:26,278 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2019-10-14 23:43:26,278 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809766481] [2019-10-14 23:43:26,279 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 23:43:26,279 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:26,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 23:43:26,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-14 23:43:26,280 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 14 states. [2019-10-14 23:43:26,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:26,477 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2019-10-14 23:43:26,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 23:43:26,478 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 66 [2019-10-14 23:43:26,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:26,479 INFO L225 Difference]: With dead ends: 77 [2019-10-14 23:43:26,479 INFO L226 Difference]: Without dead ends: 51 [2019-10-14 23:43:26,480 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2019-10-14 23:43:26,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-14 23:43:26,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2019-10-14 23:43:26,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-14 23:43:26,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2019-10-14 23:43:26,491 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 66 [2019-10-14 23:43:26,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:26,494 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2019-10-14 23:43:26,494 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 23:43:26,494 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2019-10-14 23:43:26,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-10-14 23:43:26,495 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:26,495 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 7, 7, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:26,701 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:26,702 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:26,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:26,703 INFO L82 PathProgramCache]: Analyzing trace with hash 592539373, now seen corresponding path program 7 times [2019-10-14 23:43:26,703 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:26,703 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075661345] [2019-10-14 23:43:26,704 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:26,704 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:26,704 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:26,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:26,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:26,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:26,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:26,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:26,846 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-14 23:43:26,847 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075661345] [2019-10-14 23:43:26,847 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927740270] [2019-10-14 23:43:26,847 INFO L92 rtionOrderModulation]: Changing assertion order to 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 [2019-10-14 23:43:26,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:26,924 INFO L256 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 23:43:26,927 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:26,958 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-14 23:43:26,959 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:26,959 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-14 23:43:26,960 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145330270] [2019-10-14 23:43:26,960 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:43:26,961 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:26,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:43:26,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:43:26,962 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 12 states. [2019-10-14 23:43:27,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:27,046 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2019-10-14 23:43:27,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 23:43:27,047 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 74 [2019-10-14 23:43:27,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:27,047 INFO L225 Difference]: With dead ends: 80 [2019-10-14 23:43:27,048 INFO L226 Difference]: Without dead ends: 52 [2019-10-14 23:43:27,048 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:43:27,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-14 23:43:27,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2019-10-14 23:43:27,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-14 23:43:27,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2019-10-14 23:43:27,054 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 74 [2019-10-14 23:43:27,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:27,054 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2019-10-14 23:43:27,054 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:43:27,054 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2019-10-14 23:43:27,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-10-14 23:43:27,058 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:27,058 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 8, 8, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:27,258 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:27,259 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:27,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:27,260 INFO L82 PathProgramCache]: Analyzing trace with hash 295497935, now seen corresponding path program 8 times [2019-10-14 23:43:27,261 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:27,261 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512830998] [2019-10-14 23:43:27,261 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:27,261 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:27,262 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:27,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:27,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:27,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:27,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:27,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:27,407 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-14 23:43:27,407 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512830998] [2019-10-14 23:43:27,407 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060829006] [2019-10-14 23:43:27,407 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 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 [2019-10-14 23:43:27,476 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:43:27,477 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:27,478 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 23:43:27,480 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:27,512 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-14 23:43:27,512 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:27,513 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-14 23:43:27,513 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262601333] [2019-10-14 23:43:27,514 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 23:43:27,514 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:27,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 23:43:27,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:43:27,515 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 13 states. [2019-10-14 23:43:27,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:27,638 INFO L93 Difference]: Finished difference Result 82 states and 90 transitions. [2019-10-14 23:43:27,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 23:43:27,638 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 76 [2019-10-14 23:43:27,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:27,639 INFO L225 Difference]: With dead ends: 82 [2019-10-14 23:43:27,639 INFO L226 Difference]: Without dead ends: 54 [2019-10-14 23:43:27,640 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:43:27,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-14 23:43:27,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2019-10-14 23:43:27,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-14 23:43:27,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2019-10-14 23:43:27,646 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 76 [2019-10-14 23:43:27,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:27,647 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2019-10-14 23:43:27,647 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 23:43:27,647 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2019-10-14 23:43:27,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-14 23:43:27,648 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:27,648 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:27,857 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:27,858 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:27,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:27,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1693482447, now seen corresponding path program 9 times [2019-10-14 23:43:27,859 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:27,860 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588752367] [2019-10-14 23:43:27,860 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:27,860 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:27,861 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:27,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:28,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:28,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:28,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:28,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:28,041 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-14 23:43:28,042 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588752367] [2019-10-14 23:43:28,042 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342276557] [2019-10-14 23:43:28,042 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-10-14 23:43:28,104 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-14 23:43:28,105 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:28,106 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:43:28,108 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:28,152 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2019-10-14 23:43:28,153 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:28,153 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 16 [2019-10-14 23:43:28,153 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976482865] [2019-10-14 23:43:28,158 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 23:43:28,158 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:28,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 23:43:28,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:43:28,159 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 16 states. [2019-10-14 23:43:28,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:28,359 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2019-10-14 23:43:28,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-14 23:43:28,359 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2019-10-14 23:43:28,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:28,360 INFO L225 Difference]: With dead ends: 87 [2019-10-14 23:43:28,360 INFO L226 Difference]: Without dead ends: 59 [2019-10-14 23:43:28,361 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:43:28,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-14 23:43:28,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2019-10-14 23:43:28,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-14 23:43:28,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2019-10-14 23:43:28,376 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 78 [2019-10-14 23:43:28,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:28,380 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2019-10-14 23:43:28,380 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 23:43:28,380 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2019-10-14 23:43:28,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-10-14 23:43:28,381 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:28,381 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:28,582 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:28,582 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:28,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:28,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1088178321, now seen corresponding path program 10 times [2019-10-14 23:43:28,583 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:28,583 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258752317] [2019-10-14 23:43:28,583 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:28,583 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:28,584 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:28,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:28,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:28,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:28,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:28,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:28,728 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2019-10-14 23:43:28,729 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258752317] [2019-10-14 23:43:28,729 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743786580] [2019-10-14 23:43:28,729 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2019-10-14 23:43:28,800 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:43:28,800 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:28,801 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:43:28,803 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:28,903 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 88 proven. 16 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2019-10-14 23:43:28,903 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:28,903 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2019-10-14 23:43:28,903 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957589576] [2019-10-14 23:43:28,904 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 23:43:28,904 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:28,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 23:43:28,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:43:28,905 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 19 states. [2019-10-14 23:43:29,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:29,171 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2019-10-14 23:43:29,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-14 23:43:29,171 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 82 [2019-10-14 23:43:29,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:29,172 INFO L225 Difference]: With dead ends: 93 [2019-10-14 23:43:29,172 INFO L226 Difference]: Without dead ends: 63 [2019-10-14 23:43:29,173 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2019-10-14 23:43:29,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-10-14 23:43:29,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2019-10-14 23:43:29,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-14 23:43:29,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2019-10-14 23:43:29,179 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 82 [2019-10-14 23:43:29,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:29,180 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2019-10-14 23:43:29,180 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 23:43:29,180 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2019-10-14 23:43:29,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-10-14 23:43:29,181 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:29,181 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 11, 11, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:29,385 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:29,385 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:29,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:29,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1682227375, now seen corresponding path program 11 times [2019-10-14 23:43:29,386 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:29,386 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837901966] [2019-10-14 23:43:29,387 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:29,387 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:29,387 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:29,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:29,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:29,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:29,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:29,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:29,539 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2019-10-14 23:43:29,539 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837901966] [2019-10-14 23:43:29,539 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759791155] [2019-10-14 23:43:29,539 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2019-10-14 23:43:29,853 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-10-14 23:43:29,854 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:29,855 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 23:43:29,857 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:29,954 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 124 proven. 25 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2019-10-14 23:43:29,955 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:29,955 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 21 [2019-10-14 23:43:29,955 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587534560] [2019-10-14 23:43:29,956 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 23:43:29,956 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:29,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 23:43:29,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-10-14 23:43:29,957 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 21 states. [2019-10-14 23:43:30,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:30,231 INFO L93 Difference]: Finished difference Result 99 states and 111 transitions. [2019-10-14 23:43:30,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-14 23:43:30,232 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 90 [2019-10-14 23:43:30,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:30,233 INFO L225 Difference]: With dead ends: 99 [2019-10-14 23:43:30,233 INFO L226 Difference]: Without dead ends: 67 [2019-10-14 23:43:30,234 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2019-10-14 23:43:30,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-10-14 23:43:30,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2019-10-14 23:43:30,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-10-14 23:43:30,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2019-10-14 23:43:30,239 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 90 [2019-10-14 23:43:30,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:30,239 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2019-10-14 23:43:30,239 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 23:43:30,240 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2019-10-14 23:43:30,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-14 23:43:30,241 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:30,241 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 12, 12, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:30,451 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:30,451 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:30,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:30,452 INFO L82 PathProgramCache]: Analyzing trace with hash -204807151, now seen corresponding path program 12 times [2019-10-14 23:43:30,452 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:30,453 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354568957] [2019-10-14 23:43:30,453 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:30,453 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:30,453 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:30,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:30,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:30,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:30,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:30,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:30,624 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2019-10-14 23:43:30,624 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354568957] [2019-10-14 23:43:30,625 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761533429] [2019-10-14 23:43:30,625 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-10-14 23:43:30,768 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-10-14 23:43:30,768 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:30,770 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 23:43:30,772 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:30,834 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 178 proven. 9 refuted. 0 times theorem prover too weak. 341 trivial. 0 not checked. [2019-10-14 23:43:30,835 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:30,835 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 6] total 20 [2019-10-14 23:43:30,835 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552573633] [2019-10-14 23:43:30,836 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 23:43:30,836 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:30,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 23:43:30,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2019-10-14 23:43:30,837 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 20 states. [2019-10-14 23:43:31,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:31,007 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2019-10-14 23:43:31,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 23:43:31,008 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 98 [2019-10-14 23:43:31,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:31,009 INFO L225 Difference]: With dead ends: 105 [2019-10-14 23:43:31,009 INFO L226 Difference]: Without dead ends: 71 [2019-10-14 23:43:31,010 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2019-10-14 23:43:31,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-10-14 23:43:31,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2019-10-14 23:43:31,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-10-14 23:43:31,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2019-10-14 23:43:31,016 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 98 [2019-10-14 23:43:31,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:31,016 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2019-10-14 23:43:31,016 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 23:43:31,016 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2019-10-14 23:43:31,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-10-14 23:43:31,017 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:31,017 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 13, 13, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:31,222 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:31,223 INFO L410 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:31,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:31,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1908818575, now seen corresponding path program 13 times [2019-10-14 23:43:31,224 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:31,224 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143882286] [2019-10-14 23:43:31,224 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:31,224 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:31,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:31,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:31,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:31,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:31,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:31,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:31,478 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-14 23:43:31,478 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143882286] [2019-10-14 23:43:31,479 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257643224] [2019-10-14 23:43:31,479 INFO L92 rtionOrderModulation]: Changing assertion order to 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 [2019-10-14 23:43:31,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:31,570 INFO L256 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 23:43:31,573 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:31,620 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-14 23:43:31,620 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:31,621 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-10-14 23:43:31,621 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716894580] [2019-10-14 23:43:31,622 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 23:43:31,622 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:31,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 23:43:31,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 23:43:31,623 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand 18 states. [2019-10-14 23:43:31,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:31,729 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2019-10-14 23:43:31,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 23:43:31,729 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 102 [2019-10-14 23:43:31,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:31,730 INFO L225 Difference]: With dead ends: 108 [2019-10-14 23:43:31,730 INFO L226 Difference]: Without dead ends: 72 [2019-10-14 23:43:31,730 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 23:43:31,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-10-14 23:43:31,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2019-10-14 23:43:31,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-10-14 23:43:31,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2019-10-14 23:43:31,737 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 102 [2019-10-14 23:43:31,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:31,738 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2019-10-14 23:43:31,738 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 23:43:31,738 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2019-10-14 23:43:31,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-10-14 23:43:31,739 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:31,740 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 14, 14, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:31,943 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:31,944 INFO L410 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:31,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:31,944 INFO L82 PathProgramCache]: Analyzing trace with hash 682719315, now seen corresponding path program 14 times [2019-10-14 23:43:31,944 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:31,945 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075421898] [2019-10-14 23:43:31,945 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:31,945 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:31,945 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:31,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:32,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:32,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:32,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:32,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:32,151 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-14 23:43:32,152 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075421898] [2019-10-14 23:43:32,152 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189895814] [2019-10-14 23:43:32,152 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 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 [2019-10-14 23:43:32,247 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:43:32,248 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:32,249 INFO L256 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-14 23:43:32,252 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:32,295 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-14 23:43:32,296 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:32,296 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-10-14 23:43:32,296 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021393388] [2019-10-14 23:43:32,297 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 23:43:32,297 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:32,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 23:43:32,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:43:32,298 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 19 states. [2019-10-14 23:43:32,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:32,444 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2019-10-14 23:43:32,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 23:43:32,445 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 104 [2019-10-14 23:43:32,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:32,446 INFO L225 Difference]: With dead ends: 110 [2019-10-14 23:43:32,446 INFO L226 Difference]: Without dead ends: 74 [2019-10-14 23:43:32,447 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:43:32,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-10-14 23:43:32,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2019-10-14 23:43:32,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-10-14 23:43:32,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2019-10-14 23:43:32,453 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 104 [2019-10-14 23:43:32,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:32,454 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2019-10-14 23:43:32,454 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 23:43:32,454 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2019-10-14 23:43:32,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-10-14 23:43:32,455 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:32,455 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 15, 15, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:32,660 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:32,660 INFO L410 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:32,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:32,660 INFO L82 PathProgramCache]: Analyzing trace with hash 69599925, now seen corresponding path program 15 times [2019-10-14 23:43:32,661 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:32,661 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517955917] [2019-10-14 23:43:32,661 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:32,661 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:32,662 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:32,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:32,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:32,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:32,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:32,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:32,963 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-14 23:43:32,963 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517955917] [2019-10-14 23:43:32,964 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066562541] [2019-10-14 23:43:32,964 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-10-14 23:43:33,082 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-14 23:43:33,083 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:33,084 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:43:33,087 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:33,231 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 178 proven. 16 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2019-10-14 23:43:33,232 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:33,232 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 7] total 24 [2019-10-14 23:43:33,233 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082968497] [2019-10-14 23:43:33,234 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 23:43:33,235 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:33,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 23:43:33,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2019-10-14 23:43:33,236 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 24 states. [2019-10-14 23:43:33,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:33,496 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2019-10-14 23:43:33,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-14 23:43:33,497 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 106 [2019-10-14 23:43:33,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:33,498 INFO L225 Difference]: With dead ends: 115 [2019-10-14 23:43:33,498 INFO L226 Difference]: Without dead ends: 79 [2019-10-14 23:43:33,499 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2019-10-14 23:43:33,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-10-14 23:43:33,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2019-10-14 23:43:33,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-10-14 23:43:33,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2019-10-14 23:43:33,504 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 106 [2019-10-14 23:43:33,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:33,504 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2019-10-14 23:43:33,504 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 23:43:33,504 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2019-10-14 23:43:33,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-14 23:43:33,505 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:33,505 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 16, 16, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:33,715 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:33,715 INFO L410 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:33,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:33,716 INFO L82 PathProgramCache]: Analyzing trace with hash -901824235, now seen corresponding path program 16 times [2019-10-14 23:43:33,716 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:33,717 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767015148] [2019-10-14 23:43:33,717 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:33,717 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:33,717 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:33,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:33,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:33,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:33,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:33,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:34,012 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-10-14 23:43:34,012 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767015148] [2019-10-14 23:43:34,013 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631719790] [2019-10-14 23:43:34,013 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2019-10-14 23:43:34,105 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:43:34,105 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:34,107 INFO L256 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-14 23:43:34,109 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:34,141 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-10-14 23:43:34,142 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:34,142 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-10-14 23:43:34,142 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518519685] [2019-10-14 23:43:34,144 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 23:43:34,144 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:34,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 23:43:34,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-14 23:43:34,145 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand 21 states. [2019-10-14 23:43:34,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:34,317 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2019-10-14 23:43:34,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 23:43:34,319 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 110 [2019-10-14 23:43:34,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:34,320 INFO L225 Difference]: With dead ends: 118 [2019-10-14 23:43:34,320 INFO L226 Difference]: Without dead ends: 80 [2019-10-14 23:43:34,321 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-14 23:43:34,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-10-14 23:43:34,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2019-10-14 23:43:34,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-10-14 23:43:34,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2019-10-14 23:43:34,327 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 110 [2019-10-14 23:43:34,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:34,327 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2019-10-14 23:43:34,327 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 23:43:34,327 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2019-10-14 23:43:34,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-10-14 23:43:34,328 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:34,328 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:34,539 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:34,539 INFO L410 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:34,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:34,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1698235913, now seen corresponding path program 17 times [2019-10-14 23:43:34,540 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:34,540 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118221894] [2019-10-14 23:43:34,541 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:34,541 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:34,541 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:34,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:34,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:34,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:34,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:34,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:34,893 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-10-14 23:43:34,893 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118221894] [2019-10-14 23:43:34,893 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810985946] [2019-10-14 23:43:34,894 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2019-10-14 23:43:35,896 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-10-14 23:43:35,896 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:35,901 INFO L256 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 23:43:35,903 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:36,076 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2019-10-14 23:43:36,077 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:36,077 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 28 [2019-10-14 23:43:36,077 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746541970] [2019-10-14 23:43:36,078 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-14 23:43:36,078 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:36,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-14 23:43:36,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2019-10-14 23:43:36,079 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand 28 states. [2019-10-14 23:43:36,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:36,462 INFO L93 Difference]: Finished difference Result 123 states and 135 transitions. [2019-10-14 23:43:36,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-14 23:43:36,462 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 112 [2019-10-14 23:43:36,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:36,463 INFO L225 Difference]: With dead ends: 123 [2019-10-14 23:43:36,463 INFO L226 Difference]: Without dead ends: 85 [2019-10-14 23:43:36,465 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=297, Invalid=893, Unknown=0, NotChecked=0, Total=1190 [2019-10-14 23:43:36,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-10-14 23:43:36,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2019-10-14 23:43:36,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-10-14 23:43:36,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2019-10-14 23:43:36,469 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 112 [2019-10-14 23:43:36,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:36,469 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2019-10-14 23:43:36,469 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-14 23:43:36,470 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2019-10-14 23:43:36,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-14 23:43:36,470 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:36,471 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 18, 18, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:36,671 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:36,672 INFO L410 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:36,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:36,672 INFO L82 PathProgramCache]: Analyzing trace with hash 112259767, now seen corresponding path program 18 times [2019-10-14 23:43:36,672 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:36,673 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124687173] [2019-10-14 23:43:36,673 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:36,673 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:36,674 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:36,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:36,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:36,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:36,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:36,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:36,969 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 523 trivial. 0 not checked. [2019-10-14 23:43:36,970 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124687173] [2019-10-14 23:43:36,970 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825997079] [2019-10-14 23:43:36,970 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:37,881 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-14 23:43:37,881 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:37,883 INFO L256 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 23:43:37,885 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:38,003 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 234 proven. 25 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2019-10-14 23:43:38,003 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:38,004 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 8] total 28 [2019-10-14 23:43:38,004 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521238817] [2019-10-14 23:43:38,005 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-14 23:43:38,005 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:38,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-14 23:43:38,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2019-10-14 23:43:38,006 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand 28 states. [2019-10-14 23:43:38,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:38,291 INFO L93 Difference]: Finished difference Result 129 states and 138 transitions. [2019-10-14 23:43:38,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-14 23:43:38,294 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 120 [2019-10-14 23:43:38,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:38,295 INFO L225 Difference]: With dead ends: 129 [2019-10-14 23:43:38,295 INFO L226 Difference]: Without dead ends: 89 [2019-10-14 23:43:38,296 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2019-10-14 23:43:38,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-10-14 23:43:38,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2019-10-14 23:43:38,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-10-14 23:43:38,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2019-10-14 23:43:38,302 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 120 [2019-10-14 23:43:38,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:38,302 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2019-10-14 23:43:38,302 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-14 23:43:38,302 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2019-10-14 23:43:38,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-14 23:43:38,303 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:38,303 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 19, 19, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:38,508 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:38,508 INFO L410 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:38,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:38,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1045212439, now seen corresponding path program 19 times [2019-10-14 23:43:38,509 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:38,509 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064551492] [2019-10-14 23:43:38,510 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:38,510 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:38,510 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:38,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:38,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:38,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:38,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:38,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:38,817 INFO L134 CoverageAnalysis]: Checked inductivity of 895 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-10-14 23:43:38,817 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064551492] [2019-10-14 23:43:38,817 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455916033] [2019-10-14 23:43:38,818 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:38,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:38,957 INFO L256 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-14 23:43:38,960 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:38,994 INFO L134 CoverageAnalysis]: Checked inductivity of 895 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-10-14 23:43:38,995 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:38,995 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2019-10-14 23:43:38,995 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093588009] [2019-10-14 23:43:38,996 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 23:43:38,996 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:38,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 23:43:38,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-14 23:43:38,997 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand 24 states. [2019-10-14 23:43:39,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:39,167 INFO L93 Difference]: Finished difference Result 131 states and 139 transitions. [2019-10-14 23:43:39,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-14 23:43:39,167 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 124 [2019-10-14 23:43:39,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:39,168 INFO L225 Difference]: With dead ends: 131 [2019-10-14 23:43:39,168 INFO L226 Difference]: Without dead ends: 89 [2019-10-14 23:43:39,169 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-14 23:43:39,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-10-14 23:43:39,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2019-10-14 23:43:39,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-10-14 23:43:39,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2019-10-14 23:43:39,174 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 124 [2019-10-14 23:43:39,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:39,174 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2019-10-14 23:43:39,175 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 23:43:39,175 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2019-10-14 23:43:39,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-14 23:43:39,176 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:39,176 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:39,385 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:39,385 INFO L410 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:39,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:39,386 INFO L82 PathProgramCache]: Analyzing trace with hash 514208377, now seen corresponding path program 20 times [2019-10-14 23:43:39,386 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:39,387 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440683359] [2019-10-14 23:43:39,387 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:39,387 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:39,388 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:39,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:39,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:39,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:39,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:39,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:39,539 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 116 proven. 165 refuted. 0 times theorem prover too weak. 653 trivial. 0 not checked. [2019-10-14 23:43:39,540 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440683359] [2019-10-14 23:43:39,540 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913820340] [2019-10-14 23:43:39,540 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:39,635 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:43:39,636 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:39,637 INFO L256 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 23:43:39,640 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:39,664 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 228 proven. 49 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2019-10-14 23:43:39,665 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:39,665 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2019-10-14 23:43:39,666 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259385496] [2019-10-14 23:43:39,666 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 23:43:39,667 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:39,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 23:43:39,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:43:39,668 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand 11 states. [2019-10-14 23:43:39,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:39,915 INFO L93 Difference]: Finished difference Result 133 states and 143 transitions. [2019-10-14 23:43:39,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 23:43:39,916 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 126 [2019-10-14 23:43:39,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:39,917 INFO L225 Difference]: With dead ends: 133 [2019-10-14 23:43:39,917 INFO L226 Difference]: Without dead ends: 92 [2019-10-14 23:43:39,918 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:43:39,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-10-14 23:43:39,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2019-10-14 23:43:39,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-10-14 23:43:39,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2019-10-14 23:43:39,925 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 126 [2019-10-14 23:43:39,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:39,926 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2019-10-14 23:43:39,926 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 23:43:39,926 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2019-10-14 23:43:39,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-14 23:43:39,928 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:39,928 INFO L380 BasicCegarLoop]: trace histogram [24, 24, 20, 20, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:40,135 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:40,135 INFO L410 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:40,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:40,136 INFO L82 PathProgramCache]: Analyzing trace with hash 241969623, now seen corresponding path program 21 times [2019-10-14 23:43:40,136 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:40,136 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464769859] [2019-10-14 23:43:40,136 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:40,136 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:40,136 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:40,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:40,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:40,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:40,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:40,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:40,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1075 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1039 trivial. 0 not checked. [2019-10-14 23:43:40,279 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464769859] [2019-10-14 23:43:40,279 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913117637] [2019-10-14 23:43:40,279 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:40,431 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-10-14 23:43:40,431 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:40,433 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 23:43:40,435 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:40,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1075 backedges. 298 proven. 36 refuted. 0 times theorem prover too weak. 741 trivial. 0 not checked. [2019-10-14 23:43:40,459 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:40,459 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-10-14 23:43:40,459 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946909720] [2019-10-14 23:43:40,459 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 23:43:40,460 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:40,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 23:43:40,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:43:40,460 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand 11 states. [2019-10-14 23:43:40,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:40,534 INFO L93 Difference]: Finished difference Result 121 states and 126 transitions. [2019-10-14 23:43:40,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 23:43:40,535 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 132 [2019-10-14 23:43:40,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:40,536 INFO L225 Difference]: With dead ends: 121 [2019-10-14 23:43:40,536 INFO L226 Difference]: Without dead ends: 94 [2019-10-14 23:43:40,536 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:43:40,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-10-14 23:43:40,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2019-10-14 23:43:40,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-10-14 23:43:40,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2019-10-14 23:43:40,541 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 132 [2019-10-14 23:43:40,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:40,541 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2019-10-14 23:43:40,542 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 23:43:40,542 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2019-10-14 23:43:40,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-14 23:43:40,543 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:40,543 INFO L380 BasicCegarLoop]: trace histogram [24, 24, 20, 20, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:40,747 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:40,747 INFO L410 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:40,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:40,748 INFO L82 PathProgramCache]: Analyzing trace with hash -57102763, now seen corresponding path program 22 times [2019-10-14 23:43:40,748 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:40,748 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547190161] [2019-10-14 23:43:40,749 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:40,749 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:40,749 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:40,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:40,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:40,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:40,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:40,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:40,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1039 trivial. 0 not checked. [2019-10-14 23:43:40,909 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547190161] [2019-10-14 23:43:40,909 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324274434] [2019-10-14 23:43:40,909 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:41,015 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:43:41,015 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:41,017 INFO L256 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 23:43:41,020 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:41,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 292 proven. 64 refuted. 0 times theorem prover too weak. 732 trivial. 0 not checked. [2019-10-14 23:43:41,147 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:41,147 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2019-10-14 23:43:41,147 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598463239] [2019-10-14 23:43:41,148 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 23:43:41,149 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:41,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 23:43:41,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2019-10-14 23:43:41,150 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand 20 states. [2019-10-14 23:43:41,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:41,446 INFO L93 Difference]: Finished difference Result 144 states and 155 transitions. [2019-10-14 23:43:41,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 23:43:41,447 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 134 [2019-10-14 23:43:41,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:41,448 INFO L225 Difference]: With dead ends: 144 [2019-10-14 23:43:41,448 INFO L226 Difference]: Without dead ends: 99 [2019-10-14 23:43:41,449 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2019-10-14 23:43:41,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-10-14 23:43:41,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2019-10-14 23:43:41,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-10-14 23:43:41,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2019-10-14 23:43:41,454 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 134 [2019-10-14 23:43:41,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:41,455 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2019-10-14 23:43:41,455 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 23:43:41,455 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2019-10-14 23:43:41,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-10-14 23:43:41,456 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:41,456 INFO L380 BasicCegarLoop]: trace histogram [27, 27, 20, 20, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:41,660 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:41,660 INFO L410 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:41,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:41,661 INFO L82 PathProgramCache]: Analyzing trace with hash -170609359, now seen corresponding path program 23 times [2019-10-14 23:43:41,661 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:41,661 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878578740] [2019-10-14 23:43:41,661 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:41,662 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:41,662 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:41,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:41,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:41,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:41,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:41,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:41,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1262 backedges. 184 proven. 265 refuted. 0 times theorem prover too weak. 813 trivial. 0 not checked. [2019-10-14 23:43:41,855 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878578740] [2019-10-14 23:43:41,855 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429149541] [2019-10-14 23:43:41,855 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:46,627 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2019-10-14 23:43:46,627 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:46,634 INFO L256 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 23:43:46,636 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:46,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1262 backedges. 364 proven. 81 refuted. 0 times theorem prover too weak. 817 trivial. 0 not checked. [2019-10-14 23:43:46,655 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:46,655 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2019-10-14 23:43:46,655 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173979184] [2019-10-14 23:43:46,656 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 23:43:46,656 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:46,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 23:43:46,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:43:46,656 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand 13 states. [2019-10-14 23:43:46,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:46,826 INFO L93 Difference]: Finished difference Result 149 states and 159 transitions. [2019-10-14 23:43:46,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 23:43:46,827 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 142 [2019-10-14 23:43:46,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:46,828 INFO L225 Difference]: With dead ends: 149 [2019-10-14 23:43:46,828 INFO L226 Difference]: Without dead ends: 100 [2019-10-14 23:43:46,829 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2019-10-14 23:43:46,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-10-14 23:43:46,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2019-10-14 23:43:46,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-10-14 23:43:46,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 103 transitions. [2019-10-14 23:43:46,835 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 103 transitions. Word has length 142 [2019-10-14 23:43:46,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:46,835 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 103 transitions. [2019-10-14 23:43:46,835 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 23:43:46,836 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 103 transitions. [2019-10-14 23:43:46,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-10-14 23:43:46,837 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:46,837 INFO L380 BasicCegarLoop]: trace histogram [30, 30, 20, 20, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:47,045 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:47,046 INFO L410 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:47,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:47,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1149911183, now seen corresponding path program 24 times [2019-10-14 23:43:47,047 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:47,047 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404998748] [2019-10-14 23:43:47,047 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:47,048 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:47,048 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:47,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:47,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:47,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:47,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:47,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:47,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1439 backedges. 224 proven. 324 refuted. 0 times theorem prover too weak. 891 trivial. 0 not checked. [2019-10-14 23:43:47,235 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404998748] [2019-10-14 23:43:47,235 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901602413] [2019-10-14 23:43:47,236 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:48,025 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-10-14 23:43:48,025 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:48,029 INFO L256 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-14 23:43:48,031 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:48,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1439 backedges. 450 proven. 64 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2019-10-14 23:43:48,168 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:48,169 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2019-10-14 23:43:48,169 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859198736] [2019-10-14 23:43:48,169 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-14 23:43:48,169 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:48,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-14 23:43:48,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2019-10-14 23:43:48,170 INFO L87 Difference]: Start difference. First operand 99 states and 103 transitions. Second operand 23 states. [2019-10-14 23:43:48,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:48,547 INFO L93 Difference]: Finished difference Result 156 states and 167 transitions. [2019-10-14 23:43:48,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-14 23:43:48,547 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 148 [2019-10-14 23:43:48,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:48,548 INFO L225 Difference]: With dead ends: 156 [2019-10-14 23:43:48,548 INFO L226 Difference]: Without dead ends: 105 [2019-10-14 23:43:48,549 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=288, Invalid=834, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 23:43:48,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-10-14 23:43:48,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2019-10-14 23:43:48,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-10-14 23:43:48,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2019-10-14 23:43:48,555 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 148 [2019-10-14 23:43:48,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:48,556 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2019-10-14 23:43:48,556 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-14 23:43:48,556 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2019-10-14 23:43:48,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-10-14 23:43:48,558 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:48,558 INFO L380 BasicCegarLoop]: trace histogram [33, 33, 20, 20, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:48,764 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:48,764 INFO L410 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:48,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:48,765 INFO L82 PathProgramCache]: Analyzing trace with hash 564239467, now seen corresponding path program 25 times [2019-10-14 23:43:48,765 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:48,766 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328513767] [2019-10-14 23:43:48,766 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:48,766 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:48,767 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:48,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:48,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:48,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:48,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:48,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:49,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 536 proven. 121 refuted. 0 times theorem prover too weak. 994 trivial. 0 not checked. [2019-10-14 23:43:49,175 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328513767] [2019-10-14 23:43:49,175 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8078631] [2019-10-14 23:43:49,175 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:49,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:49,290 INFO L256 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 23:43:49,292 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:49,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 532 proven. 121 refuted. 0 times theorem prover too weak. 998 trivial. 0 not checked. [2019-10-14 23:43:49,313 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:49,314 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2019-10-14 23:43:49,314 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109887451] [2019-10-14 23:43:49,314 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 23:43:49,314 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:49,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 23:43:49,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:43:49,315 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand 15 states. [2019-10-14 23:43:49,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:49,596 INFO L93 Difference]: Finished difference Result 161 states and 171 transitions. [2019-10-14 23:43:49,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 23:43:49,596 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 156 [2019-10-14 23:43:49,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:49,597 INFO L225 Difference]: With dead ends: 161 [2019-10-14 23:43:49,597 INFO L226 Difference]: Without dead ends: 106 [2019-10-14 23:43:49,598 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2019-10-14 23:43:49,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-10-14 23:43:49,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2019-10-14 23:43:49,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-10-14 23:43:49,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2019-10-14 23:43:49,603 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 156 [2019-10-14 23:43:49,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:49,604 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2019-10-14 23:43:49,604 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 23:43:49,604 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2019-10-14 23:43:49,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-10-14 23:43:49,605 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:49,605 INFO L380 BasicCegarLoop]: trace histogram [36, 36, 20, 20, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:49,809 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:49,809 INFO L410 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:49,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:49,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1487237961, now seen corresponding path program 26 times [2019-10-14 23:43:49,810 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:49,811 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496301173] [2019-10-14 23:43:49,811 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:49,811 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:49,811 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:49,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:49,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:49,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:49,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:49,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:49,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1864 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1783 trivial. 0 not checked. [2019-10-14 23:43:49,971 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496301173] [2019-10-14 23:43:49,971 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850044624] [2019-10-14 23:43:49,971 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:50,088 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:43:50,089 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:50,090 INFO L256 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-14 23:43:50,098 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:50,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1864 backedges. 628 proven. 144 refuted. 0 times theorem prover too weak. 1092 trivial. 0 not checked. [2019-10-14 23:43:50,312 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:50,312 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2019-10-14 23:43:50,312 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561406307] [2019-10-14 23:43:50,313 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-14 23:43:50,313 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:50,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-14 23:43:50,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=478, Unknown=0, NotChecked=0, Total=650 [2019-10-14 23:43:50,314 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand 26 states. [2019-10-14 23:43:50,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:50,757 INFO L93 Difference]: Finished difference Result 168 states and 179 transitions. [2019-10-14 23:43:50,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-14 23:43:50,757 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 162 [2019-10-14 23:43:50,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:50,759 INFO L225 Difference]: With dead ends: 168 [2019-10-14 23:43:50,759 INFO L226 Difference]: Without dead ends: 111 [2019-10-14 23:43:50,760 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=1102, Unknown=0, NotChecked=0, Total=1482 [2019-10-14 23:43:50,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-10-14 23:43:50,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2019-10-14 23:43:50,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-10-14 23:43:50,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2019-10-14 23:43:50,767 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 162 [2019-10-14 23:43:50,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:50,767 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2019-10-14 23:43:50,767 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-14 23:43:50,767 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2019-10-14 23:43:50,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-10-14 23:43:50,768 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:50,768 INFO L380 BasicCegarLoop]: trace histogram [39, 39, 20, 20, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:50,972 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:50,973 INFO L410 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:50,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:50,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1872108507, now seen corresponding path program 27 times [2019-10-14 23:43:50,973 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:50,974 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328416745] [2019-10-14 23:43:50,974 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:50,974 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:50,974 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:51,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:51,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:51,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:51,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:51,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:51,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2114 backedges. 736 proven. 169 refuted. 0 times theorem prover too weak. 1209 trivial. 0 not checked. [2019-10-14 23:43:51,186 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328416745] [2019-10-14 23:43:51,187 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535653003] [2019-10-14 23:43:51,187 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:51,552 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-10-14 23:43:51,553 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:51,555 INFO L256 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-14 23:43:51,558 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:51,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2114 backedges. 738 proven. 100 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2019-10-14 23:43:51,742 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:51,742 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 28 [2019-10-14 23:43:51,742 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224812508] [2019-10-14 23:43:51,745 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-14 23:43:51,745 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:51,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-14 23:43:51,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=557, Unknown=0, NotChecked=0, Total=756 [2019-10-14 23:43:51,746 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand 28 states. [2019-10-14 23:43:52,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:52,383 INFO L93 Difference]: Finished difference Result 176 states and 187 transitions. [2019-10-14 23:43:52,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-14 23:43:52,384 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 170 [2019-10-14 23:43:52,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:52,385 INFO L225 Difference]: With dead ends: 176 [2019-10-14 23:43:52,385 INFO L226 Difference]: Without dead ends: 115 [2019-10-14 23:43:52,387 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=1285, Unknown=0, NotChecked=0, Total=1722 [2019-10-14 23:43:52,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-10-14 23:43:52,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2019-10-14 23:43:52,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-10-14 23:43:52,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 117 transitions. [2019-10-14 23:43:52,395 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 117 transitions. Word has length 170 [2019-10-14 23:43:52,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:52,395 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 117 transitions. [2019-10-14 23:43:52,395 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-14 23:43:52,396 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 117 transitions. [2019-10-14 23:43:52,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-10-14 23:43:52,398 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:52,399 INFO L380 BasicCegarLoop]: trace histogram [42, 42, 20, 20, 11, 11, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:52,605 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:52,606 INFO L410 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:52,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:52,606 INFO L82 PathProgramCache]: Analyzing trace with hash -140304383, now seen corresponding path program 28 times [2019-10-14 23:43:52,607 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:52,607 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95159213] [2019-10-14 23:43:52,607 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:52,607 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:52,607 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:52,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:52,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:52,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:52,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:52,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:52,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2384 backedges. 848 proven. 196 refuted. 0 times theorem prover too weak. 1340 trivial. 0 not checked. [2019-10-14 23:43:52,851 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95159213] [2019-10-14 23:43:52,851 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586140970] [2019-10-14 23:43:52,851 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:52,971 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:43:52,971 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:52,973 INFO L256 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-14 23:43:52,975 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:52,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2384 backedges. 848 proven. 196 refuted. 0 times theorem prover too weak. 1340 trivial. 0 not checked. [2019-10-14 23:43:52,995 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:52,995 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2019-10-14 23:43:52,995 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591331745] [2019-10-14 23:43:52,996 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 23:43:52,996 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:52,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 23:43:52,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 23:43:52,996 INFO L87 Difference]: Start difference. First operand 113 states and 117 transitions. Second operand 18 states. [2019-10-14 23:43:53,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:53,366 INFO L93 Difference]: Finished difference Result 181 states and 191 transitions. [2019-10-14 23:43:53,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 23:43:53,367 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 178 [2019-10-14 23:43:53,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:53,368 INFO L225 Difference]: With dead ends: 181 [2019-10-14 23:43:53,368 INFO L226 Difference]: Without dead ends: 116 [2019-10-14 23:43:53,369 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2019-10-14 23:43:53,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-10-14 23:43:53,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2019-10-14 23:43:53,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-10-14 23:43:53,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 119 transitions. [2019-10-14 23:43:53,375 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 119 transitions. Word has length 178 [2019-10-14 23:43:53,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:53,376 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 119 transitions. [2019-10-14 23:43:53,376 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 23:43:53,376 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 119 transitions. [2019-10-14 23:43:53,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2019-10-14 23:43:53,377 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:53,377 INFO L380 BasicCegarLoop]: trace histogram [45, 45, 20, 20, 11, 11, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:53,581 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:53,582 INFO L410 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:53,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:53,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1093086303, now seen corresponding path program 29 times [2019-10-14 23:43:53,582 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:53,583 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575389850] [2019-10-14 23:43:53,583 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:53,583 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:53,583 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:53,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:53,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:53,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:53,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:53,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:53,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2651 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 2530 trivial. 0 not checked. [2019-10-14 23:43:53,808 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575389850] [2019-10-14 23:43:53,810 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006559741] [2019-10-14 23:43:53,810 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true