/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/combinations/pals_lcr.5_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:59:04,747 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:59:04,751 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:59:04,806 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:59:04,806 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:59:04,810 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:59:04,814 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:59:04,821 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:59:04,824 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:59:04,830 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:59:04,831 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:59:04,832 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:59:04,833 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:59:04,836 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:59:04,838 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:59:04,839 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:59:04,840 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:59:04,859 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:59:04,867 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:59:04,875 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:59:04,877 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:59:04,878 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:59:04,880 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:59:04,882 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:59:04,890 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:59:04,895 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:59:04,896 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:59:04,898 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:59:04,899 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:59:04,901 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:59:04,901 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:59:04,902 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:59:04,903 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:59:04,904 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:59:04,905 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:59:04,906 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:59:04,907 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:59:04,967 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:59:04,967 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:59:04,973 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:59:04,974 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:59:04,974 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:59:04,974 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:59:04,974 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:59:04,974 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:59:04,975 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:59:04,975 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:59:04,977 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:59:04,977 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:59:04,977 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:59:04,977 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:59:04,978 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:59:04,978 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:59:04,978 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:59:04,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:59:04,979 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:59:04,979 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:59:04,979 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:59:04,980 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:59:04,980 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:59:04,980 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:59:04,980 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:59:04,981 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:59:05,455 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:59:05,489 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:59:05,493 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:59:05,494 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:59:05,495 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:59:05,496 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.5_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c [2020-12-22 09:59:05,591 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79bb6f353/4f513d35a1cc455da079ade9654c910f/FLAGa4ea20dfe [2020-12-22 09:59:06,675 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:59:06,676 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c [2020-12-22 09:59:06,721 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79bb6f353/4f513d35a1cc455da079ade9654c910f/FLAGa4ea20dfe [2020-12-22 09:59:07,100 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79bb6f353/4f513d35a1cc455da079ade9654c910f [2020-12-22 09:59:07,104 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:59:07,107 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:59:07,111 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:59:07,111 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:59:07,115 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:59:07,116 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:59:07" (1/1) ... [2020-12-22 09:59:07,118 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d25ce5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:07, skipping insertion in model container [2020-12-22 09:59:07,119 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:59:07" (1/1) ... [2020-12-22 09:59:07,127 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:59:07,327 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:59:07,666 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c[11832,11845] [2020-12-22 09:59:07,787 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c[17144,17157] [2020-12-22 09:59:08,847 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:59:08,862 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:59:08,957 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c[11832,11845] [2020-12-22 09:59:08,976 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c[17144,17157] [2020-12-22 09:59:09,731 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:59:09,782 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:59:09,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:09 WrapperNode [2020-12-22 09:59:09,784 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:59:09,785 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:59:09,785 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:59:09,785 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:59:09,794 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:09" (1/1) ... [2020-12-22 09:59:09,869 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:09" (1/1) ... [2020-12-22 09:59:10,330 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:59:10,331 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:59:10,331 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:59:10,331 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:59:10,342 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:09" (1/1) ... [2020-12-22 09:59:10,342 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:09" (1/1) ... [2020-12-22 09:59:10,489 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:09" (1/1) ... [2020-12-22 09:59:10,490 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:09" (1/1) ... [2020-12-22 09:59:10,667 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:09" (1/1) ... [2020-12-22 09:59:10,760 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:09" (1/1) ... [2020-12-22 09:59:10,806 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:09" (1/1) ... [2020-12-22 09:59:10,874 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:59:10,876 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:59:10,876 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:59:10,876 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:59:10,878 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:09" (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 [2020-12-22 09:59:10,991 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:59:10,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:59:10,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:59:10,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:59:16,445 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:59:16,446 INFO L299 CfgBuilder]: Removed 36 assume(true) statements. [2020-12-22 09:59:16,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:59:16 BoogieIcfgContainer [2020-12-22 09:59:16,451 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:59:16,452 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:59:16,453 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:59:16,458 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:59:16,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:59:07" (1/3) ... [2020-12-22 09:59:16,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2455ce26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:59:16, skipping insertion in model container [2020-12-22 09:59:16,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:09" (2/3) ... [2020-12-22 09:59:16,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2455ce26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:59:16, skipping insertion in model container [2020-12-22 09:59:16,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:59:16" (3/3) ... [2020-12-22 09:59:16,462 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c [2020-12-22 09:59:16,469 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:59:16,475 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:59:16,495 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:59:16,527 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:59:16,527 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:59:16,527 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:59:16,527 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:59:16,528 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:59:16,528 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:59:16,528 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:59:16,528 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:59:16,571 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states. [2020-12-22 09:59:16,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 09:59:16,581 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:16,582 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:16,583 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:16,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:16,590 INFO L82 PathProgramCache]: Analyzing trace with hash -441366565, now seen corresponding path program 1 times [2020-12-22 09:59:16,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:16,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375217448] [2020-12-22 09:59:16,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:16,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:16,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:16,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375217448] [2020-12-22 09:59:16,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:16,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:59:16,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138596322] [2020-12-22 09:59:16,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 09:59:16,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:16,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 09:59:16,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:59:16,905 INFO L87 Difference]: Start difference. First operand 908 states. Second operand 2 states. [2020-12-22 09:59:17,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:17,006 INFO L93 Difference]: Finished difference Result 1777 states and 3370 transitions. [2020-12-22 09:59:17,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 09:59:17,008 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 34 [2020-12-22 09:59:17,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:17,060 INFO L225 Difference]: With dead ends: 1777 [2020-12-22 09:59:17,060 INFO L226 Difference]: Without dead ends: 842 [2020-12-22 09:59:17,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:59:17,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2020-12-22 09:59:17,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 842. [2020-12-22 09:59:17,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 842 states. [2020-12-22 09:59:17,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1588 transitions. [2020-12-22 09:59:17,181 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1588 transitions. Word has length 34 [2020-12-22 09:59:17,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:17,182 INFO L481 AbstractCegarLoop]: Abstraction has 842 states and 1588 transitions. [2020-12-22 09:59:17,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 09:59:17,182 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1588 transitions. [2020-12-22 09:59:17,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 09:59:17,184 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:17,184 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:17,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:59:17,185 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:17,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:17,186 INFO L82 PathProgramCache]: Analyzing trace with hash -950839655, now seen corresponding path program 1 times [2020-12-22 09:59:17,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:17,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134225790] [2020-12-22 09:59:17,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:17,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:17,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:17,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134225790] [2020-12-22 09:59:17,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:17,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:59:17,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959640197] [2020-12-22 09:59:17,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:59:17,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:17,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:59:17,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:59:17,409 INFO L87 Difference]: Start difference. First operand 842 states and 1588 transitions. Second operand 5 states. [2020-12-22 09:59:17,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:17,540 INFO L93 Difference]: Finished difference Result 897 states and 1673 transitions. [2020-12-22 09:59:17,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:59:17,541 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-12-22 09:59:17,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:17,547 INFO L225 Difference]: With dead ends: 897 [2020-12-22 09:59:17,547 INFO L226 Difference]: Without dead ends: 842 [2020-12-22 09:59:17,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:59:17,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2020-12-22 09:59:17,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 842. [2020-12-22 09:59:17,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 842 states. [2020-12-22 09:59:17,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1557 transitions. [2020-12-22 09:59:17,582 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1557 transitions. Word has length 34 [2020-12-22 09:59:17,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:17,582 INFO L481 AbstractCegarLoop]: Abstraction has 842 states and 1557 transitions. [2020-12-22 09:59:17,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:59:17,582 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1557 transitions. [2020-12-22 09:59:17,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 09:59:17,584 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:17,585 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:17,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:59:17,585 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:17,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:17,586 INFO L82 PathProgramCache]: Analyzing trace with hash -2091494059, now seen corresponding path program 1 times [2020-12-22 09:59:17,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:17,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257796647] [2020-12-22 09:59:17,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:17,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:17,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:17,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257796647] [2020-12-22 09:59:17,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:17,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:59:17,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080477414] [2020-12-22 09:59:17,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:59:17,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:17,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:59:17,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:59:17,940 INFO L87 Difference]: Start difference. First operand 842 states and 1557 transitions. Second operand 4 states. [2020-12-22 09:59:29,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:29,344 INFO L93 Difference]: Finished difference Result 3097 states and 5866 transitions. [2020-12-22 09:59:29,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:59:29,345 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-12-22 09:59:29,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:29,359 INFO L225 Difference]: With dead ends: 3097 [2020-12-22 09:59:29,359 INFO L226 Difference]: Without dead ends: 2344 [2020-12-22 09:59:29,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:59:29,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2344 states. [2020-12-22 09:59:29,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2344 to 2344. [2020-12-22 09:59:29,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2344 states. [2020-12-22 09:59:29,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2344 states to 2344 states and 3671 transitions. [2020-12-22 09:59:29,425 INFO L78 Accepts]: Start accepts. Automaton has 2344 states and 3671 transitions. Word has length 48 [2020-12-22 09:59:29,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:29,426 INFO L481 AbstractCegarLoop]: Abstraction has 2344 states and 3671 transitions. [2020-12-22 09:59:29,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:59:29,426 INFO L276 IsEmpty]: Start isEmpty. Operand 2344 states and 3671 transitions. [2020-12-22 09:59:29,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:59:29,428 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:29,429 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:29,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:59:29,429 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:29,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:29,430 INFO L82 PathProgramCache]: Analyzing trace with hash -695028240, now seen corresponding path program 1 times [2020-12-22 09:59:29,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:29,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601578965] [2020-12-22 09:59:29,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:29,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:29,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:29,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601578965] [2020-12-22 09:59:29,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:29,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:59:29,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271572736] [2020-12-22 09:59:29,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:59:29,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:29,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:59:29,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:59:29,542 INFO L87 Difference]: Start difference. First operand 2344 states and 3671 transitions. Second operand 3 states. [2020-12-22 09:59:29,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:29,599 INFO L93 Difference]: Finished difference Result 2440 states and 3823 transitions. [2020-12-22 09:59:29,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:59:29,600 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:59:29,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:29,613 INFO L225 Difference]: With dead ends: 2440 [2020-12-22 09:59:29,614 INFO L226 Difference]: Without dead ends: 2389 [2020-12-22 09:59:29,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:59:29,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2389 states. [2020-12-22 09:59:29,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2389 to 2387. [2020-12-22 09:59:29,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2387 states. [2020-12-22 09:59:29,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2387 states to 2387 states and 3740 transitions. [2020-12-22 09:59:29,682 INFO L78 Accepts]: Start accepts. Automaton has 2387 states and 3740 transitions. Word has length 64 [2020-12-22 09:59:29,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:29,685 INFO L481 AbstractCegarLoop]: Abstraction has 2387 states and 3740 transitions. [2020-12-22 09:59:29,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:59:29,685 INFO L276 IsEmpty]: Start isEmpty. Operand 2387 states and 3740 transitions. [2020-12-22 09:59:29,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:59:29,691 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:29,691 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:29,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:59:29,692 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:29,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:29,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1440610970, now seen corresponding path program 1 times [2020-12-22 09:59:29,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:29,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025467062] [2020-12-22 09:59:29,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:29,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:29,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:29,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025467062] [2020-12-22 09:59:29,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:29,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:59:29,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194607709] [2020-12-22 09:59:29,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:59:29,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:29,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:59:29,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:59:29,843 INFO L87 Difference]: Start difference. First operand 2387 states and 3740 transitions. Second operand 3 states. [2020-12-22 09:59:29,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:29,898 INFO L93 Difference]: Finished difference Result 2563 states and 4020 transitions. [2020-12-22 09:59:29,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:59:29,900 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:59:29,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:29,913 INFO L225 Difference]: With dead ends: 2563 [2020-12-22 09:59:29,914 INFO L226 Difference]: Without dead ends: 2469 [2020-12-22 09:59:29,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:59:29,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2469 states. [2020-12-22 09:59:29,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2469 to 2467. [2020-12-22 09:59:29,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2467 states. [2020-12-22 09:59:29,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2467 states to 2467 states and 3867 transitions. [2020-12-22 09:59:29,981 INFO L78 Accepts]: Start accepts. Automaton has 2467 states and 3867 transitions. Word has length 64 [2020-12-22 09:59:29,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:29,982 INFO L481 AbstractCegarLoop]: Abstraction has 2467 states and 3867 transitions. [2020-12-22 09:59:29,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:59:29,983 INFO L276 IsEmpty]: Start isEmpty. Operand 2467 states and 3867 transitions. [2020-12-22 09:59:29,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:59:29,984 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:29,985 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:29,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:59:29,985 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:29,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:29,986 INFO L82 PathProgramCache]: Analyzing trace with hash 914325468, now seen corresponding path program 1 times [2020-12-22 09:59:29,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:29,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451340633] [2020-12-22 09:59:29,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:30,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:30,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:30,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451340633] [2020-12-22 09:59:30,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:30,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:59:30,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209814238] [2020-12-22 09:59:30,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:59:30,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:30,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:59:30,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:59:30,079 INFO L87 Difference]: Start difference. First operand 2467 states and 3867 transitions. Second operand 3 states. [2020-12-22 09:59:30,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:30,135 INFO L93 Difference]: Finished difference Result 2791 states and 4381 transitions. [2020-12-22 09:59:30,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:59:30,136 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:59:30,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:30,150 INFO L225 Difference]: With dead ends: 2791 [2020-12-22 09:59:30,151 INFO L226 Difference]: Without dead ends: 2617 [2020-12-22 09:59:30,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:59:30,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2617 states. [2020-12-22 09:59:30,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2617 to 2615. [2020-12-22 09:59:30,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2615 states. [2020-12-22 09:59:30,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2615 states to 2615 states and 4099 transitions. [2020-12-22 09:59:30,223 INFO L78 Accepts]: Start accepts. Automaton has 2615 states and 4099 transitions. Word has length 64 [2020-12-22 09:59:30,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:30,223 INFO L481 AbstractCegarLoop]: Abstraction has 2615 states and 4099 transitions. [2020-12-22 09:59:30,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:59:30,223 INFO L276 IsEmpty]: Start isEmpty. Operand 2615 states and 4099 transitions. [2020-12-22 09:59:30,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:59:30,224 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:30,224 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:30,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:59:30,225 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:30,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:30,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1701027568, now seen corresponding path program 1 times [2020-12-22 09:59:30,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:30,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043202377] [2020-12-22 09:59:30,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:30,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:30,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:30,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043202377] [2020-12-22 09:59:30,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:30,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:59:30,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067934534] [2020-12-22 09:59:30,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:59:30,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:30,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:59:30,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:59:30,286 INFO L87 Difference]: Start difference. First operand 2615 states and 4099 transitions. Second operand 3 states. [2020-12-22 09:59:30,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:30,349 INFO L93 Difference]: Finished difference Result 3211 states and 5037 transitions. [2020-12-22 09:59:30,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:59:30,350 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:59:30,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:30,365 INFO L225 Difference]: With dead ends: 3211 [2020-12-22 09:59:30,366 INFO L226 Difference]: Without dead ends: 2889 [2020-12-22 09:59:30,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:59:30,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2889 states. [2020-12-22 09:59:30,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2889 to 2887. [2020-12-22 09:59:30,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2887 states. [2020-12-22 09:59:30,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2887 states to 2887 states and 4519 transitions. [2020-12-22 09:59:30,453 INFO L78 Accepts]: Start accepts. Automaton has 2887 states and 4519 transitions. Word has length 64 [2020-12-22 09:59:30,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:30,453 INFO L481 AbstractCegarLoop]: Abstraction has 2887 states and 4519 transitions. [2020-12-22 09:59:30,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:59:30,454 INFO L276 IsEmpty]: Start isEmpty. Operand 2887 states and 4519 transitions. [2020-12-22 09:59:30,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:59:30,454 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:30,455 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:30,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:59:30,455 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:30,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:30,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1105068988, now seen corresponding path program 1 times [2020-12-22 09:59:30,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:30,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733150177] [2020-12-22 09:59:30,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:30,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:30,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:30,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733150177] [2020-12-22 09:59:30,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:30,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:59:30,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396787418] [2020-12-22 09:59:30,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:59:30,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:30,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:59:30,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:59:30,559 INFO L87 Difference]: Start difference. First operand 2887 states and 4519 transitions. Second operand 3 states. [2020-12-22 09:59:30,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:30,654 INFO L93 Difference]: Finished difference Result 3979 states and 6217 transitions. [2020-12-22 09:59:30,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:59:30,655 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:59:30,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:30,676 INFO L225 Difference]: With dead ends: 3979 [2020-12-22 09:59:30,677 INFO L226 Difference]: Without dead ends: 3385 [2020-12-22 09:59:30,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:59:30,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3385 states. [2020-12-22 09:59:30,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3385 to 3383. [2020-12-22 09:59:30,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3383 states. [2020-12-22 09:59:30,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3383 states to 3383 states and 5271 transitions. [2020-12-22 09:59:30,822 INFO L78 Accepts]: Start accepts. Automaton has 3383 states and 5271 transitions. Word has length 64 [2020-12-22 09:59:30,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:30,824 INFO L481 AbstractCegarLoop]: Abstraction has 3383 states and 5271 transitions. [2020-12-22 09:59:30,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:59:30,824 INFO L276 IsEmpty]: Start isEmpty. Operand 3383 states and 5271 transitions. [2020-12-22 09:59:30,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:59:30,825 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:30,825 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:30,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:59:30,825 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:30,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:30,826 INFO L82 PathProgramCache]: Analyzing trace with hash 112916410, now seen corresponding path program 1 times [2020-12-22 09:59:30,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:30,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633019588] [2020-12-22 09:59:30,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:30,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:30,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:30,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633019588] [2020-12-22 09:59:30,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:30,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:59:30,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165403648] [2020-12-22 09:59:30,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:59:30,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:30,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:59:30,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:59:30,955 INFO L87 Difference]: Start difference. First operand 3383 states and 5271 transitions. Second operand 7 states. [2020-12-22 09:59:31,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:31,892 INFO L93 Difference]: Finished difference Result 14283 states and 22081 transitions. [2020-12-22 09:59:31,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 09:59:31,893 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 64 [2020-12-22 09:59:31,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:31,981 INFO L225 Difference]: With dead ends: 14283 [2020-12-22 09:59:31,981 INFO L226 Difference]: Without dead ends: 13193 [2020-12-22 09:59:31,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-12-22 09:59:32,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13193 states. [2020-12-22 09:59:32,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13193 to 4471. [2020-12-22 09:59:32,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4471 states. [2020-12-22 09:59:32,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4471 states to 4471 states and 6887 transitions. [2020-12-22 09:59:32,368 INFO L78 Accepts]: Start accepts. Automaton has 4471 states and 6887 transitions. Word has length 64 [2020-12-22 09:59:32,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:32,369 INFO L481 AbstractCegarLoop]: Abstraction has 4471 states and 6887 transitions. [2020-12-22 09:59:32,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:59:32,369 INFO L276 IsEmpty]: Start isEmpty. Operand 4471 states and 6887 transitions. [2020-12-22 09:59:32,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:59:32,377 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:32,377 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:32,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:59:32,378 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:32,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:32,379 INFO L82 PathProgramCache]: Analyzing trace with hash -277208054, now seen corresponding path program 1 times [2020-12-22 09:59:32,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:32,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785656777] [2020-12-22 09:59:32,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:32,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:32,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:32,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785656777] [2020-12-22 09:59:32,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:32,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:59:32,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051957575] [2020-12-22 09:59:32,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:59:32,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:32,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:59:32,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:59:32,471 INFO L87 Difference]: Start difference. First operand 4471 states and 6887 transitions. Second operand 3 states. [2020-12-22 09:59:32,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:32,725 INFO L93 Difference]: Finished difference Result 7661 states and 11707 transitions. [2020-12-22 09:59:32,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:59:32,730 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:59:32,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:32,744 INFO L225 Difference]: With dead ends: 7661 [2020-12-22 09:59:32,744 INFO L226 Difference]: Without dead ends: 5483 [2020-12-22 09:59:32,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:59:32,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5483 states. [2020-12-22 09:59:33,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5483 to 5481. [2020-12-22 09:59:33,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5481 states. [2020-12-22 09:59:33,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5481 states to 5481 states and 8361 transitions. [2020-12-22 09:59:33,035 INFO L78 Accepts]: Start accepts. Automaton has 5481 states and 8361 transitions. Word has length 66 [2020-12-22 09:59:33,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:33,035 INFO L481 AbstractCegarLoop]: Abstraction has 5481 states and 8361 transitions. [2020-12-22 09:59:33,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:59:33,036 INFO L276 IsEmpty]: Start isEmpty. Operand 5481 states and 8361 transitions. [2020-12-22 09:59:33,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:59:33,036 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:33,036 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:33,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:59:33,037 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:33,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:33,037 INFO L82 PathProgramCache]: Analyzing trace with hash -210714542, now seen corresponding path program 1 times [2020-12-22 09:59:33,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:33,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788332716] [2020-12-22 09:59:33,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:33,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:33,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:33,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788332716] [2020-12-22 09:59:33,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:33,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:59:33,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859491063] [2020-12-22 09:59:33,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:59:33,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:33,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:59:33,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:59:33,255 INFO L87 Difference]: Start difference. First operand 5481 states and 8361 transitions. Second operand 7 states. [2020-12-22 09:59:33,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:33,735 INFO L93 Difference]: Finished difference Result 8669 states and 13131 transitions. [2020-12-22 09:59:33,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:59:33,736 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-12-22 09:59:33,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:33,747 INFO L225 Difference]: With dead ends: 8669 [2020-12-22 09:59:33,747 INFO L226 Difference]: Without dead ends: 5483 [2020-12-22 09:59:33,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:59:33,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5483 states. [2020-12-22 09:59:33,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5483 to 5481. [2020-12-22 09:59:33,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5481 states. [2020-12-22 09:59:34,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5481 states to 5481 states and 8313 transitions. [2020-12-22 09:59:34,001 INFO L78 Accepts]: Start accepts. Automaton has 5481 states and 8313 transitions. Word has length 66 [2020-12-22 09:59:34,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:34,002 INFO L481 AbstractCegarLoop]: Abstraction has 5481 states and 8313 transitions. [2020-12-22 09:59:34,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:59:34,002 INFO L276 IsEmpty]: Start isEmpty. Operand 5481 states and 8313 transitions. [2020-12-22 09:59:34,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:59:34,003 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:34,003 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:34,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:59:34,003 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:34,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:34,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1643060746, now seen corresponding path program 1 times [2020-12-22 09:59:34,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:34,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545477106] [2020-12-22 09:59:34,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:34,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:34,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:34,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545477106] [2020-12-22 09:59:34,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:34,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:59:34,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620310763] [2020-12-22 09:59:34,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:59:34,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:34,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:59:34,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:59:34,099 INFO L87 Difference]: Start difference. First operand 5481 states and 8313 transitions. Second operand 6 states. [2020-12-22 09:59:34,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:34,470 INFO L93 Difference]: Finished difference Result 8667 states and 13034 transitions. [2020-12-22 09:59:34,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:59:34,471 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 09:59:34,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:34,482 INFO L225 Difference]: With dead ends: 8667 [2020-12-22 09:59:34,483 INFO L226 Difference]: Without dead ends: 5481 [2020-12-22 09:59:34,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:59:34,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5481 states. [2020-12-22 09:59:34,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5481 to 5481. [2020-12-22 09:59:34,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5481 states. [2020-12-22 09:59:34,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5481 states to 5481 states and 8265 transitions. [2020-12-22 09:59:34,773 INFO L78 Accepts]: Start accepts. Automaton has 5481 states and 8265 transitions. Word has length 67 [2020-12-22 09:59:34,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:34,774 INFO L481 AbstractCegarLoop]: Abstraction has 5481 states and 8265 transitions. [2020-12-22 09:59:34,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:59:34,774 INFO L276 IsEmpty]: Start isEmpty. Operand 5481 states and 8265 transitions. [2020-12-22 09:59:34,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:59:34,775 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:34,775 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:34,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:59:34,775 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:34,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:34,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1372042872, now seen corresponding path program 1 times [2020-12-22 09:59:34,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:34,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912282838] [2020-12-22 09:59:34,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:34,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:34,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:34,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912282838] [2020-12-22 09:59:34,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:34,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:59:34,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838222257] [2020-12-22 09:59:34,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:59:34,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:34,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:59:34,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:59:34,858 INFO L87 Difference]: Start difference. First operand 5481 states and 8265 transitions. Second operand 6 states. [2020-12-22 09:59:35,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:35,225 INFO L93 Difference]: Finished difference Result 8667 states and 12938 transitions. [2020-12-22 09:59:35,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:59:35,226 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 09:59:35,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:35,238 INFO L225 Difference]: With dead ends: 8667 [2020-12-22 09:59:35,238 INFO L226 Difference]: Without dead ends: 5481 [2020-12-22 09:59:35,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:59:35,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5481 states. [2020-12-22 09:59:35,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5481 to 5481. [2020-12-22 09:59:35,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5481 states. [2020-12-22 09:59:35,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5481 states to 5481 states and 8217 transitions. [2020-12-22 09:59:35,526 INFO L78 Accepts]: Start accepts. Automaton has 5481 states and 8217 transitions. Word has length 67 [2020-12-22 09:59:35,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:35,526 INFO L481 AbstractCegarLoop]: Abstraction has 5481 states and 8217 transitions. [2020-12-22 09:59:35,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:59:35,526 INFO L276 IsEmpty]: Start isEmpty. Operand 5481 states and 8217 transitions. [2020-12-22 09:59:35,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:59:35,527 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:35,527 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:35,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:59:35,528 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:35,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:35,528 INFO L82 PathProgramCache]: Analyzing trace with hash 316900870, now seen corresponding path program 1 times [2020-12-22 09:59:35,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:35,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916128598] [2020-12-22 09:59:35,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:35,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:35,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:35,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916128598] [2020-12-22 09:59:35,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:35,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:59:35,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987705408] [2020-12-22 09:59:35,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:59:35,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:35,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:59:35,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:59:35,608 INFO L87 Difference]: Start difference. First operand 5481 states and 8217 transitions. Second operand 5 states. [2020-12-22 09:59:36,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:36,199 INFO L93 Difference]: Finished difference Result 8260 states and 12127 transitions. [2020-12-22 09:59:36,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:59:36,199 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-12-22 09:59:36,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:36,220 INFO L225 Difference]: With dead ends: 8260 [2020-12-22 09:59:36,221 INFO L226 Difference]: Without dead ends: 8258 [2020-12-22 09:59:36,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:59:36,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8258 states. [2020-12-22 09:59:36,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8258 to 5673. [2020-12-22 09:59:36,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5673 states. [2020-12-22 09:59:36,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5673 states to 5673 states and 8393 transitions. [2020-12-22 09:59:36,639 INFO L78 Accepts]: Start accepts. Automaton has 5673 states and 8393 transitions. Word has length 67 [2020-12-22 09:59:36,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:36,639 INFO L481 AbstractCegarLoop]: Abstraction has 5673 states and 8393 transitions. [2020-12-22 09:59:36,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:59:36,640 INFO L276 IsEmpty]: Start isEmpty. Operand 5673 states and 8393 transitions. [2020-12-22 09:59:36,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:59:36,644 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:36,644 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:36,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:59:36,645 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:36,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:36,646 INFO L82 PathProgramCache]: Analyzing trace with hash -119875554, now seen corresponding path program 1 times [2020-12-22 09:59:36,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:36,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991523424] [2020-12-22 09:59:36,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:36,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:36,775 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 09:59:36,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991523424] [2020-12-22 09:59:36,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:36,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:59:36,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077732416] [2020-12-22 09:59:36,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:59:36,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:36,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:59:36,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:59:36,777 INFO L87 Difference]: Start difference. First operand 5673 states and 8393 transitions. Second operand 7 states. [2020-12-22 09:59:38,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:38,328 INFO L93 Difference]: Finished difference Result 23253 states and 33327 transitions. [2020-12-22 09:59:38,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:59:38,329 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:59:38,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:38,370 INFO L225 Difference]: With dead ends: 23253 [2020-12-22 09:59:38,370 INFO L226 Difference]: Without dead ends: 19875 [2020-12-22 09:59:38,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:59:38,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19875 states. [2020-12-22 09:59:38,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19875 to 9049. [2020-12-22 09:59:38,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9049 states. [2020-12-22 09:59:39,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9049 states to 9049 states and 13145 transitions. [2020-12-22 09:59:39,007 INFO L78 Accepts]: Start accepts. Automaton has 9049 states and 13145 transitions. Word has length 94 [2020-12-22 09:59:39,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:39,007 INFO L481 AbstractCegarLoop]: Abstraction has 9049 states and 13145 transitions. [2020-12-22 09:59:39,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:59:39,007 INFO L276 IsEmpty]: Start isEmpty. Operand 9049 states and 13145 transitions. [2020-12-22 09:59:39,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:59:39,012 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:39,012 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:39,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:59:39,013 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:39,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:39,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1888658370, now seen corresponding path program 1 times [2020-12-22 09:59:39,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:39,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027999857] [2020-12-22 09:59:39,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:39,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:39,196 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 09:59:39,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027999857] [2020-12-22 09:59:39,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:39,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:59:39,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979231459] [2020-12-22 09:59:39,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:59:39,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:39,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:59:39,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:59:39,201 INFO L87 Difference]: Start difference. First operand 9049 states and 13145 transitions. Second operand 7 states. [2020-12-22 09:59:40,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:40,536 INFO L93 Difference]: Finished difference Result 26629 states and 38079 transitions. [2020-12-22 09:59:40,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:59:40,537 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:59:40,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:40,582 INFO L225 Difference]: With dead ends: 26629 [2020-12-22 09:59:40,582 INFO L226 Difference]: Without dead ends: 23251 [2020-12-22 09:59:40,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:59:40,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23251 states. [2020-12-22 09:59:41,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23251 to 14121. [2020-12-22 09:59:41,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14121 states. [2020-12-22 09:59:41,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14121 states to 14121 states and 20233 transitions. [2020-12-22 09:59:41,487 INFO L78 Accepts]: Start accepts. Automaton has 14121 states and 20233 transitions. Word has length 94 [2020-12-22 09:59:41,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:41,487 INFO L481 AbstractCegarLoop]: Abstraction has 14121 states and 20233 transitions. [2020-12-22 09:59:41,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:59:41,487 INFO L276 IsEmpty]: Start isEmpty. Operand 14121 states and 20233 transitions. [2020-12-22 09:59:41,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:59:41,492 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:41,492 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:41,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:59:41,493 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:41,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:41,493 INFO L82 PathProgramCache]: Analyzing trace with hash -757018530, now seen corresponding path program 1 times [2020-12-22 09:59:41,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:41,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960039728] [2020-12-22 09:59:41,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:41,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:41,731 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 09:59:41,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960039728] [2020-12-22 09:59:41,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:41,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:59:41,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635025465] [2020-12-22 09:59:41,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:59:41,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:41,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:59:41,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:59:41,734 INFO L87 Difference]: Start difference. First operand 14121 states and 20233 transitions. Second operand 7 states. [2020-12-22 09:59:44,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:44,084 INFO L93 Difference]: Finished difference Result 30005 states and 42831 transitions. [2020-12-22 09:59:44,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:59:44,085 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:59:44,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:44,129 INFO L225 Difference]: With dead ends: 30005 [2020-12-22 09:59:44,129 INFO L226 Difference]: Without dead ends: 26627 [2020-12-22 09:59:44,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:59:44,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26627 states. [2020-12-22 09:59:45,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26627 to 17497. [2020-12-22 09:59:45,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17497 states. [2020-12-22 09:59:45,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17497 states to 17497 states and 24985 transitions. [2020-12-22 09:59:45,354 INFO L78 Accepts]: Start accepts. Automaton has 17497 states and 24985 transitions. Word has length 94 [2020-12-22 09:59:45,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:45,355 INFO L481 AbstractCegarLoop]: Abstraction has 17497 states and 24985 transitions. [2020-12-22 09:59:45,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:59:45,355 INFO L276 IsEmpty]: Start isEmpty. Operand 17497 states and 24985 transitions. [2020-12-22 09:59:45,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:59:45,360 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:45,360 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:45,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:59:45,361 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:45,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:45,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1992477570, now seen corresponding path program 1 times [2020-12-22 09:59:45,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:45,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087253585] [2020-12-22 09:59:45,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:45,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:45,487 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 09:59:45,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087253585] [2020-12-22 09:59:45,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:45,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:59:45,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391933432] [2020-12-22 09:59:45,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:59:45,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:45,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:59:45,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:59:45,489 INFO L87 Difference]: Start difference. First operand 17497 states and 24985 transitions. Second operand 7 states. [2020-12-22 09:59:47,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:47,320 INFO L93 Difference]: Finished difference Result 33381 states and 47583 transitions. [2020-12-22 09:59:47,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:59:47,322 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:59:47,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:47,372 INFO L225 Difference]: With dead ends: 33381 [2020-12-22 09:59:47,372 INFO L226 Difference]: Without dead ends: 30003 [2020-12-22 09:59:47,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:59:47,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30003 states. [2020-12-22 09:59:49,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30003 to 20873. [2020-12-22 09:59:49,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20873 states. [2020-12-22 09:59:49,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20873 states to 20873 states and 29737 transitions. [2020-12-22 09:59:49,091 INFO L78 Accepts]: Start accepts. Automaton has 20873 states and 29737 transitions. Word has length 94 [2020-12-22 09:59:49,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:49,092 INFO L481 AbstractCegarLoop]: Abstraction has 20873 states and 29737 transitions. [2020-12-22 09:59:49,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:59:49,092 INFO L276 IsEmpty]: Start isEmpty. Operand 20873 states and 29737 transitions. [2020-12-22 09:59:49,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:59:49,099 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:49,099 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:49,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:59:49,100 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:49,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:49,100 INFO L82 PathProgramCache]: Analyzing trace with hash 881494174, now seen corresponding path program 1 times [2020-12-22 09:59:49,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:49,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228429462] [2020-12-22 09:59:49,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:49,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:49,213 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:59:49,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228429462] [2020-12-22 09:59:49,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:49,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:59:49,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539648426] [2020-12-22 09:59:49,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:59:49,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:49,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:59:49,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:59:49,216 INFO L87 Difference]: Start difference. First operand 20873 states and 29737 transitions. Second operand 7 states. [2020-12-22 09:59:51,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:51,375 INFO L93 Difference]: Finished difference Result 34741 states and 49519 transitions. [2020-12-22 09:59:51,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:59:51,376 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:59:51,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:51,411 INFO L225 Difference]: With dead ends: 34741 [2020-12-22 09:59:51,411 INFO L226 Difference]: Without dead ends: 32371 [2020-12-22 09:59:51,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:59:51,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32371 states. [2020-12-22 09:59:53,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32371 to 23241. [2020-12-22 09:59:53,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23241 states. [2020-12-22 09:59:53,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23241 states to 23241 states and 33097 transitions. [2020-12-22 09:59:53,148 INFO L78 Accepts]: Start accepts. Automaton has 23241 states and 33097 transitions. Word has length 94 [2020-12-22 09:59:53,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:53,148 INFO L481 AbstractCegarLoop]: Abstraction has 23241 states and 33097 transitions. [2020-12-22 09:59:53,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:59:53,148 INFO L276 IsEmpty]: Start isEmpty. Operand 23241 states and 33097 transitions. [2020-12-22 09:59:53,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:59:53,156 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:53,156 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:53,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:59:53,157 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:53,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:53,157 INFO L82 PathProgramCache]: Analyzing trace with hash 2121264847, now seen corresponding path program 1 times [2020-12-22 09:59:53,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:53,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756152847] [2020-12-22 09:59:53,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:53,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:53,529 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:53,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756152847] [2020-12-22 09:59:53,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924435434] [2020-12-22 09:59:53,530 INFO L95 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 [2020-12-22 09:59:53,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:53,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 09:59:53,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:59:54,120 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:59:54,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:59:54,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4] total 16 [2020-12-22 09:59:54,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948000806] [2020-12-22 09:59:54,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 09:59:54,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:54,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 09:59:54,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-12-22 09:59:54,123 INFO L87 Difference]: Start difference. First operand 23241 states and 33097 transitions. Second operand 16 states. [2020-12-22 10:00:09,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:09,415 INFO L93 Difference]: Finished difference Result 135840 states and 189896 transitions. [2020-12-22 10:00:09,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-12-22 10:00:09,416 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 95 [2020-12-22 10:00:09,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:09,800 INFO L225 Difference]: With dead ends: 135840 [2020-12-22 10:00:09,800 INFO L226 Difference]: Without dead ends: 114894 [2020-12-22 10:00:09,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2295 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1223, Invalid=5419, Unknown=0, NotChecked=0, Total=6642 [2020-12-22 10:00:09,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114894 states. [2020-12-22 10:00:17,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114894 to 72497. [2020-12-22 10:00:17,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72497 states. [2020-12-22 10:00:18,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72497 states to 72497 states and 101081 transitions. [2020-12-22 10:00:18,019 INFO L78 Accepts]: Start accepts. Automaton has 72497 states and 101081 transitions. Word has length 95 [2020-12-22 10:00:18,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:18,019 INFO L481 AbstractCegarLoop]: Abstraction has 72497 states and 101081 transitions. [2020-12-22 10:00:18,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:00:18,020 INFO L276 IsEmpty]: Start isEmpty. Operand 72497 states and 101081 transitions. [2020-12-22 10:00:18,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 10:00:18,032 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:18,032 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:18,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:00:18,247 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:18,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:18,248 INFO L82 PathProgramCache]: Analyzing trace with hash 421270486, now seen corresponding path program 1 times [2020-12-22 10:00:18,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:18,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740048392] [2020-12-22 10:00:18,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:18,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:18,862 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:18,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740048392] [2020-12-22 10:00:18,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429592241] [2020-12-22 10:00:18,863 INFO L95 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 [2020-12-22 10:00:19,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:19,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 10:00:19,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:00:19,403 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:00:19,620 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:19,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:00:19,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2020-12-22 10:00:19,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24278516] [2020-12-22 10:00:19,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 10:00:19,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:19,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 10:00:19,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:00:19,623 INFO L87 Difference]: Start difference. First operand 72497 states and 101081 transitions. Second operand 21 states. [2020-12-22 10:00:20,176 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-12-22 10:00:21,012 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-12-22 10:00:21,227 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2020-12-22 10:00:21,703 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2020-12-22 10:00:31,505 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-12-22 10:00:31,733 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2020-12-22 10:00:31,994 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-22 10:00:32,221 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2020-12-22 10:00:32,638 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-12-22 10:00:32,926 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-12-22 10:00:33,166 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-12-22 10:00:33,469 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-12-22 10:00:33,712 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-12-22 10:00:33,937 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2020-12-22 10:00:34,185 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2020-12-22 10:00:34,443 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-22 10:00:34,881 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-12-22 10:00:35,072 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2020-12-22 10:00:35,338 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-12-22 10:00:35,612 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2020-12-22 10:00:36,031 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-12-22 10:00:36,243 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-12-22 10:00:36,739 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2020-12-22 10:00:37,247 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-12-22 10:00:37,906 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-12-22 10:00:38,170 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-12-22 10:00:38,538 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-12-22 10:00:38,789 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2020-12-22 10:00:39,022 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-22 10:00:39,245 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2020-12-22 10:00:39,520 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2020-12-22 10:00:40,570 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-12-22 10:00:40,796 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-12-22 10:00:41,195 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-22 10:00:41,658 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-12-22 10:02:10,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:02:10,151 INFO L93 Difference]: Finished difference Result 975004 states and 1328614 transitions. [2020-12-22 10:02:10,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 306 states. [2020-12-22 10:02:10,152 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 96 [2020-12-22 10:02:10,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:02:12,315 INFO L225 Difference]: With dead ends: 975004 [2020-12-22 10:02:12,315 INFO L226 Difference]: Without dead ends: 904802 [2020-12-22 10:02:12,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 322 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45792 ImplicationChecksByTransitivity, 20.7s TimeCoverageRelationStatistics Valid=10942, Invalid=93710, Unknown=0, NotChecked=0, Total=104652 [2020-12-22 10:02:13,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904802 states.