/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.4.1.ufo.UNBOUNDED.pals+Problem12_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:44:23,764 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:44:23,769 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:44:23,825 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:44:23,826 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:44:23,831 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:44:23,835 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:44:23,843 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:44:23,847 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:44:23,854 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:44:23,856 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:44:23,857 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:44:23,857 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:44:23,860 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:44:23,862 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:44:23,864 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:44:23,865 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:44:23,869 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:44:23,877 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:44:23,886 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:44:23,888 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:44:23,890 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:44:23,892 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:44:23,895 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:44:23,904 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:44:23,910 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:44:23,911 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:44:23,913 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:44:23,914 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:44:23,915 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:44:23,916 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:44:23,917 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:44:23,917 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:44:23,918 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:44:23,919 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:44:23,920 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:44:23,921 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:44:23,997 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:44:23,998 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:44:24,002 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:44:24,003 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:44:24,003 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:44:24,003 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:44:24,003 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:44:24,004 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:44:24,004 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:44:24,004 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:44:24,005 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:44:24,006 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:44:24,006 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:44:24,006 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:44:24,007 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:44:24,007 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:44:24,007 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:44:24,007 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:44:24,008 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:44:24,008 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:44:24,008 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:44:24,009 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:44:24,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:44:24,009 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:44:24,009 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:44:24,009 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:44:24,416 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:44:24,442 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:44:24,445 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:44:24,446 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:44:24,447 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:44:24,448 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label09.c [2020-12-22 09:44:24,522 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bda1eb6a/af96e54172294c41914d85c6e1ca395d/FLAGc8905bff8 [2020-12-22 09:44:25,528 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:44:25,529 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label09.c [2020-12-22 09:44:25,581 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bda1eb6a/af96e54172294c41914d85c6e1ca395d/FLAGc8905bff8 [2020-12-22 09:44:25,977 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bda1eb6a/af96e54172294c41914d85c6e1ca395d [2020-12-22 09:44:25,981 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:44:25,984 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:44:25,988 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:44:25,988 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:44:25,992 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:44:25,993 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:44:25" (1/1) ... [2020-12-22 09:44:25,995 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51fb8f64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:44:25, skipping insertion in model container [2020-12-22 09:44:25,995 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:44:25" (1/1) ... [2020-12-22 09:44:26,003 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:44:26,173 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:44:26,748 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.4.1.ufo.UNBOUNDED.pals+Problem12_label09.c[8821,8834] [2020-12-22 09:44:26,859 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.4.1.ufo.UNBOUNDED.pals+Problem12_label09.c[16326,16339] [2020-12-22 09:44:27,732 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:44:27,748 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:44:27,819 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.4.1.ufo.UNBOUNDED.pals+Problem12_label09.c[8821,8834] [2020-12-22 09:44:27,848 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.4.1.ufo.UNBOUNDED.pals+Problem12_label09.c[16326,16339] [2020-12-22 09:44:28,531 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:44:28,570 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:44:28,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:44:28 WrapperNode [2020-12-22 09:44:28,571 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:44:28,572 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:44:28,573 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:44:28,573 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:44:28,582 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:44:28" (1/1) ... [2020-12-22 09:44:28,678 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:44:28" (1/1) ... [2020-12-22 09:44:29,135 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:44:29,138 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:44:29,139 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:44:29,139 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:44:29,149 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:44:28" (1/1) ... [2020-12-22 09:44:29,149 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:44:28" (1/1) ... [2020-12-22 09:44:29,194 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:44:28" (1/1) ... [2020-12-22 09:44:29,195 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:44:28" (1/1) ... [2020-12-22 09:44:29,431 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:44:28" (1/1) ... [2020-12-22 09:44:29,472 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:44:28" (1/1) ... [2020-12-22 09:44:29,517 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:44:28" (1/1) ... [2020-12-22 09:44:29,582 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:44:29,583 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:44:29,584 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:44:29,584 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:44:29,585 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:44:28" (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 09:44:29,697 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:44:29,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:44:29,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:44:29,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:44:36,605 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:44:36,606 INFO L299 CfgBuilder]: Removed 34 assume(true) statements. [2020-12-22 09:44:36,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:44:36 BoogieIcfgContainer [2020-12-22 09:44:36,609 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:44:36,612 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:44:36,612 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:44:36,615 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:44:36,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:44:25" (1/3) ... [2020-12-22 09:44:36,617 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@412f296 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:44:36, skipping insertion in model container [2020-12-22 09:44:36,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:44:28" (2/3) ... [2020-12-22 09:44:36,617 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@412f296 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:44:36, skipping insertion in model container [2020-12-22 09:44:36,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:44:36" (3/3) ... [2020-12-22 09:44:36,619 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label09.c [2020-12-22 09:44:36,625 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:44:36,632 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:44:36,651 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:44:36,686 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:44:36,686 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:44:36,686 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:44:36,686 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:44:36,687 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:44:36,687 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:44:36,687 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:44:36,687 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:44:36,720 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states. [2020-12-22 09:44:36,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 09:44:36,728 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:36,729 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] [2020-12-22 09:44:36,730 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:36,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:36,736 INFO L82 PathProgramCache]: Analyzing trace with hash 2085104645, now seen corresponding path program 1 times [2020-12-22 09:44:36,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:36,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168528331] [2020-12-22 09:44:36,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:36,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:36,968 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 09:44:36,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168528331] [2020-12-22 09:44:36,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:36,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:44:36,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073913704] [2020-12-22 09:44:36,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 09:44:36,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:36,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 09:44:36,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:44:36,993 INFO L87 Difference]: Start difference. First operand 894 states. Second operand 2 states. [2020-12-22 09:44:37,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:37,079 INFO L93 Difference]: Finished difference Result 1757 states and 3334 transitions. [2020-12-22 09:44:37,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 09:44:37,080 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 30 [2020-12-22 09:44:37,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:37,105 INFO L225 Difference]: With dead ends: 1757 [2020-12-22 09:44:37,105 INFO L226 Difference]: Without dead ends: 828 [2020-12-22 09:44:37,113 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 09:44:37,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2020-12-22 09:44:37,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 828. [2020-12-22 09:44:37,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 828 states. [2020-12-22 09:44:37,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1562 transitions. [2020-12-22 09:44:37,206 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1562 transitions. Word has length 30 [2020-12-22 09:44:37,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:37,206 INFO L481 AbstractCegarLoop]: Abstraction has 828 states and 1562 transitions. [2020-12-22 09:44:37,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 09:44:37,206 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1562 transitions. [2020-12-22 09:44:37,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 09:44:37,208 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:37,208 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] [2020-12-22 09:44:37,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:44:37,209 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:37,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:37,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1951091139, now seen corresponding path program 1 times [2020-12-22 09:44:37,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:37,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109328435] [2020-12-22 09:44:37,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:37,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:37,331 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 09:44:37,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109328435] [2020-12-22 09:44:37,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:37,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:44:37,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73996258] [2020-12-22 09:44:37,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:44:37,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:37,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:44:37,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:44:37,336 INFO L87 Difference]: Start difference. First operand 828 states and 1562 transitions. Second operand 5 states. [2020-12-22 09:44:37,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:37,468 INFO L93 Difference]: Finished difference Result 877 states and 1637 transitions. [2020-12-22 09:44:37,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:44:37,469 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-12-22 09:44:37,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:37,475 INFO L225 Difference]: With dead ends: 877 [2020-12-22 09:44:37,475 INFO L226 Difference]: Without dead ends: 828 [2020-12-22 09:44:37,476 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 09:44:37,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2020-12-22 09:44:37,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 828. [2020-12-22 09:44:37,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 828 states. [2020-12-22 09:44:37,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1539 transitions. [2020-12-22 09:44:37,501 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1539 transitions. Word has length 30 [2020-12-22 09:44:37,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:37,501 INFO L481 AbstractCegarLoop]: Abstraction has 828 states and 1539 transitions. [2020-12-22 09:44:37,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:44:37,502 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1539 transitions. [2020-12-22 09:44:37,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:44:37,504 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:37,504 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] [2020-12-22 09:44:37,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:44:37,505 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:37,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:37,505 INFO L82 PathProgramCache]: Analyzing trace with hash 568524862, now seen corresponding path program 1 times [2020-12-22 09:44:37,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:37,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272571220] [2020-12-22 09:44:37,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:37,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:37,712 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 09:44:37,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272571220] [2020-12-22 09:44:37,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:37,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:44:37,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763772044] [2020-12-22 09:44:37,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:44:37,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:37,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:44:37,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:44:37,715 INFO L87 Difference]: Start difference. First operand 828 states and 1539 transitions. Second operand 6 states. [2020-12-22 09:44:37,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:38,000 INFO L93 Difference]: Finished difference Result 1188 states and 2107 transitions. [2020-12-22 09:44:38,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 09:44:38,001 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-12-22 09:44:38,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:38,008 INFO L225 Difference]: With dead ends: 1188 [2020-12-22 09:44:38,008 INFO L226 Difference]: Without dead ends: 1143 [2020-12-22 09:44:38,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:44:38,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2020-12-22 09:44:38,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 871. [2020-12-22 09:44:38,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 871 states. [2020-12-22 09:44:38,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 1607 transitions. [2020-12-22 09:44:38,039 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 1607 transitions. Word has length 52 [2020-12-22 09:44:38,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:38,039 INFO L481 AbstractCegarLoop]: Abstraction has 871 states and 1607 transitions. [2020-12-22 09:44:38,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:44:38,040 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 1607 transitions. [2020-12-22 09:44:38,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:44:38,042 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:38,042 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] [2020-12-22 09:44:38,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:44:38,042 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:38,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:38,043 INFO L82 PathProgramCache]: Analyzing trace with hash -524152242, now seen corresponding path program 1 times [2020-12-22 09:44:38,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:38,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968909241] [2020-12-22 09:44:38,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:38,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:38,210 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 09:44:38,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968909241] [2020-12-22 09:44:38,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:38,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:44:38,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590545539] [2020-12-22 09:44:38,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:44:38,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:38,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:44:38,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:44:38,216 INFO L87 Difference]: Start difference. First operand 871 states and 1607 transitions. Second operand 3 states. [2020-12-22 09:44:38,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:38,283 INFO L93 Difference]: Finished difference Result 1036 states and 1866 transitions. [2020-12-22 09:44:38,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:44:38,284 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:44:38,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:38,292 INFO L225 Difference]: With dead ends: 1036 [2020-12-22 09:44:38,292 INFO L226 Difference]: Without dead ends: 948 [2020-12-22 09:44:38,293 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 09:44:38,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2020-12-22 09:44:38,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 944. [2020-12-22 09:44:38,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 944 states. [2020-12-22 09:44:38,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1719 transitions. [2020-12-22 09:44:38,324 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1719 transitions. Word has length 54 [2020-12-22 09:44:38,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:38,327 INFO L481 AbstractCegarLoop]: Abstraction has 944 states and 1719 transitions. [2020-12-22 09:44:38,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:44:38,327 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1719 transitions. [2020-12-22 09:44:38,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:44:38,331 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:38,331 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] [2020-12-22 09:44:38,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:44:38,331 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:38,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:38,332 INFO L82 PathProgramCache]: Analyzing trace with hash -457658730, now seen corresponding path program 1 times [2020-12-22 09:44:38,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:38,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044433469] [2020-12-22 09:44:38,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:38,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:38,631 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 09:44:38,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044433469] [2020-12-22 09:44:38,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:38,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:44:38,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131659076] [2020-12-22 09:44:38,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:44:38,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:38,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:44:38,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:44:38,634 INFO L87 Difference]: Start difference. First operand 944 states and 1719 transitions. Second operand 6 states. [2020-12-22 09:44:38,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:38,865 INFO L93 Difference]: Finished difference Result 1107 states and 1971 transitions. [2020-12-22 09:44:38,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:44:38,866 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-12-22 09:44:38,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:38,872 INFO L225 Difference]: With dead ends: 1107 [2020-12-22 09:44:38,873 INFO L226 Difference]: Without dead ends: 946 [2020-12-22 09:44:38,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:44:38,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2020-12-22 09:44:38,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 944. [2020-12-22 09:44:38,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 944 states. [2020-12-22 09:44:38,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1717 transitions. [2020-12-22 09:44:38,906 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1717 transitions. Word has length 54 [2020-12-22 09:44:38,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:38,907 INFO L481 AbstractCegarLoop]: Abstraction has 944 states and 1717 transitions. [2020-12-22 09:44:38,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:44:38,907 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1717 transitions. [2020-12-22 09:44:38,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:44:38,909 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:38,910 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] [2020-12-22 09:44:38,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:44:38,910 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:38,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:38,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1331255346, now seen corresponding path program 1 times [2020-12-22 09:44:38,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:38,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823875576] [2020-12-22 09:44:38,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:38,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:39,023 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 09:44:39,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823875576] [2020-12-22 09:44:39,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:39,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:44:39,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285704132] [2020-12-22 09:44:39,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:44:39,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:39,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:44:39,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:44:39,028 INFO L87 Difference]: Start difference. First operand 944 states and 1717 transitions. Second operand 3 states. [2020-12-22 09:44:39,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:39,083 INFO L93 Difference]: Finished difference Result 1242 states and 2175 transitions. [2020-12-22 09:44:39,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:44:39,084 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:44:39,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:39,092 INFO L225 Difference]: With dead ends: 1242 [2020-12-22 09:44:39,092 INFO L226 Difference]: Without dead ends: 1081 [2020-12-22 09:44:39,093 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 09:44:39,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2020-12-22 09:44:39,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 1079. [2020-12-22 09:44:39,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1079 states. [2020-12-22 09:44:39,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 1921 transitions. [2020-12-22 09:44:39,127 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 1921 transitions. Word has length 54 [2020-12-22 09:44:39,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:39,127 INFO L481 AbstractCegarLoop]: Abstraction has 1079 states and 1921 transitions. [2020-12-22 09:44:39,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:44:39,128 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 1921 transitions. [2020-12-22 09:44:39,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:44:39,128 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:39,129 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] [2020-12-22 09:44:39,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:44:39,130 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:39,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:39,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1716204334, now seen corresponding path program 1 times [2020-12-22 09:44:39,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:39,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866434682] [2020-12-22 09:44:39,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:39,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:39,179 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 09:44:39,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866434682] [2020-12-22 09:44:39,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:39,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:44:39,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115649505] [2020-12-22 09:44:39,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:44:39,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:39,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:44:39,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:44:39,182 INFO L87 Difference]: Start difference. First operand 1079 states and 1921 transitions. Second operand 3 states. [2020-12-22 09:44:39,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:39,238 INFO L93 Difference]: Finished difference Result 1623 states and 2747 transitions. [2020-12-22 09:44:39,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:44:39,239 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:44:39,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:39,246 INFO L225 Difference]: With dead ends: 1623 [2020-12-22 09:44:39,246 INFO L226 Difference]: Without dead ends: 1327 [2020-12-22 09:44:39,247 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 09:44:39,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2020-12-22 09:44:39,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 1325. [2020-12-22 09:44:39,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1325 states. [2020-12-22 09:44:39,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1325 states to 1325 states and 2285 transitions. [2020-12-22 09:44:39,293 INFO L78 Accepts]: Start accepts. Automaton has 1325 states and 2285 transitions. Word has length 54 [2020-12-22 09:44:39,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:39,293 INFO L481 AbstractCegarLoop]: Abstraction has 1325 states and 2285 transitions. [2020-12-22 09:44:39,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:44:39,293 INFO L276 IsEmpty]: Start isEmpty. Operand 1325 states and 2285 transitions. [2020-12-22 09:44:39,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:44:39,294 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:39,294 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] [2020-12-22 09:44:39,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:44:39,294 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:39,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:39,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1442516622, now seen corresponding path program 1 times [2020-12-22 09:44:39,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:39,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385301635] [2020-12-22 09:44:39,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:39,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:39,351 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 09:44:39,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385301635] [2020-12-22 09:44:39,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:39,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:44:39,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540873729] [2020-12-22 09:44:39,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:44:39,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:39,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:44:39,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:44:39,353 INFO L87 Difference]: Start difference. First operand 1325 states and 2285 transitions. Second operand 3 states. [2020-12-22 09:44:39,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:39,426 INFO L93 Difference]: Finished difference Result 2313 states and 3759 transitions. [2020-12-22 09:44:39,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:44:39,426 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:44:39,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:39,437 INFO L225 Difference]: With dead ends: 2313 [2020-12-22 09:44:39,437 INFO L226 Difference]: Without dead ends: 1771 [2020-12-22 09:44:39,439 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 09:44:39,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1771 states. [2020-12-22 09:44:39,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1771 to 1769. [2020-12-22 09:44:39,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1769 states. [2020-12-22 09:44:39,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1769 states to 1769 states and 2925 transitions. [2020-12-22 09:44:39,519 INFO L78 Accepts]: Start accepts. Automaton has 1769 states and 2925 transitions. Word has length 54 [2020-12-22 09:44:39,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:39,521 INFO L481 AbstractCegarLoop]: Abstraction has 1769 states and 2925 transitions. [2020-12-22 09:44:39,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:44:39,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1769 states and 2925 transitions. [2020-12-22 09:44:39,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:44:39,522 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:39,522 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] [2020-12-22 09:44:39,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:44:39,523 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:39,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:39,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1717241860, now seen corresponding path program 1 times [2020-12-22 09:44:39,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:39,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259078727] [2020-12-22 09:44:39,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:39,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:39,654 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 09:44:39,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259078727] [2020-12-22 09:44:39,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:39,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:44:39,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814006188] [2020-12-22 09:44:39,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:44:39,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:39,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:44:39,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:44:39,659 INFO L87 Difference]: Start difference. First operand 1769 states and 2925 transitions. Second operand 5 states. [2020-12-22 09:44:39,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:39,923 INFO L93 Difference]: Finished difference Result 2523 states and 4010 transitions. [2020-12-22 09:44:39,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:44:39,924 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2020-12-22 09:44:39,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:39,939 INFO L225 Difference]: With dead ends: 2523 [2020-12-22 09:44:39,939 INFO L226 Difference]: Without dead ends: 2521 [2020-12-22 09:44:39,941 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 09:44:39,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2521 states. [2020-12-22 09:44:40,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2521 to 1817. [2020-12-22 09:44:40,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1817 states. [2020-12-22 09:44:40,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1817 states to 1817 states and 2965 transitions. [2020-12-22 09:44:40,062 INFO L78 Accepts]: Start accepts. Automaton has 1817 states and 2965 transitions. Word has length 55 [2020-12-22 09:44:40,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:40,063 INFO L481 AbstractCegarLoop]: Abstraction has 1817 states and 2965 transitions. [2020-12-22 09:44:40,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:44:40,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1817 states and 2965 transitions. [2020-12-22 09:44:40,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 09:44:40,064 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:40,064 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] [2020-12-22 09:44:40,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:44:40,065 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:40,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:40,066 INFO L82 PathProgramCache]: Analyzing trace with hash -754642547, now seen corresponding path program 1 times [2020-12-22 09:44:40,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:40,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137900867] [2020-12-22 09:44:40,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:40,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:40,124 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 09:44:40,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137900867] [2020-12-22 09:44:40,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:40,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:44:40,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727218655] [2020-12-22 09:44:40,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:44:40,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:40,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:44:40,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:44:40,131 INFO L87 Difference]: Start difference. First operand 1817 states and 2965 transitions. Second operand 3 states. [2020-12-22 09:44:40,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:40,269 INFO L93 Difference]: Finished difference Result 2880 states and 4523 transitions. [2020-12-22 09:44:40,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:44:40,272 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2020-12-22 09:44:40,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:40,284 INFO L225 Difference]: With dead ends: 2880 [2020-12-22 09:44:40,284 INFO L226 Difference]: Without dead ends: 2285 [2020-12-22 09:44:40,289 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 09:44:40,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2020-12-22 09:44:40,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 2283. [2020-12-22 09:44:40,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2283 states. [2020-12-22 09:44:40,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2283 states to 2283 states and 3623 transitions. [2020-12-22 09:44:40,421 INFO L78 Accepts]: Start accepts. Automaton has 2283 states and 3623 transitions. Word has length 56 [2020-12-22 09:44:40,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:40,421 INFO L481 AbstractCegarLoop]: Abstraction has 2283 states and 3623 transitions. [2020-12-22 09:44:40,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:44:40,422 INFO L276 IsEmpty]: Start isEmpty. Operand 2283 states and 3623 transitions. [2020-12-22 09:44:40,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:44:40,423 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:40,423 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 09:44:40,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:44:40,423 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:40,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:40,424 INFO L82 PathProgramCache]: Analyzing trace with hash -241975758, now seen corresponding path program 1 times [2020-12-22 09:44:40,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:40,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931112724] [2020-12-22 09:44:40,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:40,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:40,558 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 09:44:40,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931112724] [2020-12-22 09:44:40,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:40,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:44:40,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821047633] [2020-12-22 09:44:40,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:44:40,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:40,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:44:40,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:44:40,569 INFO L87 Difference]: Start difference. First operand 2283 states and 3623 transitions. Second operand 4 states. [2020-12-22 09:44:56,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:56,097 INFO L93 Difference]: Finished difference Result 4538 states and 7932 transitions. [2020-12-22 09:44:56,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:44:56,098 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-12-22 09:44:56,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:56,120 INFO L225 Difference]: With dead ends: 4538 [2020-12-22 09:44:56,120 INFO L226 Difference]: Without dead ends: 3785 [2020-12-22 09:44:56,123 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 09:44:56,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3785 states. [2020-12-22 09:44:56,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3785 to 3785. [2020-12-22 09:44:56,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3785 states. [2020-12-22 09:44:56,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3785 states to 3785 states and 5737 transitions. [2020-12-22 09:44:56,290 INFO L78 Accepts]: Start accepts. Automaton has 3785 states and 5737 transitions. Word has length 67 [2020-12-22 09:44:56,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:56,290 INFO L481 AbstractCegarLoop]: Abstraction has 3785 states and 5737 transitions. [2020-12-22 09:44:56,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:44:56,290 INFO L276 IsEmpty]: Start isEmpty. Operand 3785 states and 5737 transitions. [2020-12-22 09:44:56,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 09:44:56,292 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:56,293 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:44:56,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:44:56,293 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:56,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:56,294 INFO L82 PathProgramCache]: Analyzing trace with hash 280942850, now seen corresponding path program 1 times [2020-12-22 09:44:56,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:56,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478406327] [2020-12-22 09:44:56,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:56,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:56,405 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 09:44:56,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478406327] [2020-12-22 09:44:56,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:56,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:44:56,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376217669] [2020-12-22 09:44:56,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:44:56,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:56,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:44:56,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:44:56,408 INFO L87 Difference]: Start difference. First operand 3785 states and 5737 transitions. Second operand 6 states. [2020-12-22 09:44:57,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:57,009 INFO L93 Difference]: Finished difference Result 10091 states and 14778 transitions. [2020-12-22 09:44:57,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:44:57,011 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 09:44:57,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:57,166 INFO L225 Difference]: With dead ends: 10091 [2020-12-22 09:44:57,167 INFO L226 Difference]: Without dead ends: 8593 [2020-12-22 09:44:57,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 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 09:44:57,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8593 states. [2020-12-22 09:44:57,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8593 to 5281. [2020-12-22 09:44:57,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5281 states. [2020-12-22 09:44:57,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5281 states to 5281 states and 7865 transitions. [2020-12-22 09:44:57,499 INFO L78 Accepts]: Start accepts. Automaton has 5281 states and 7865 transitions. Word has length 78 [2020-12-22 09:44:57,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:57,499 INFO L481 AbstractCegarLoop]: Abstraction has 5281 states and 7865 transitions. [2020-12-22 09:44:57,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:44:57,499 INFO L276 IsEmpty]: Start isEmpty. Operand 5281 states and 7865 transitions. [2020-12-22 09:44:57,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 09:44:57,501 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:57,502 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:44:57,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:44:57,502 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:57,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:57,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1528450466, now seen corresponding path program 1 times [2020-12-22 09:44:57,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:57,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192865677] [2020-12-22 09:44:57,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:57,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:57,619 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 09:44:57,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192865677] [2020-12-22 09:44:57,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:57,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:44:57,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683467654] [2020-12-22 09:44:57,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:44:57,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:57,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:44:57,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:44:57,622 INFO L87 Difference]: Start difference. First operand 5281 states and 7865 transitions. Second operand 6 states. [2020-12-22 09:44:58,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:58,240 INFO L93 Difference]: Finished difference Result 11587 states and 16906 transitions. [2020-12-22 09:44:58,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:44:58,241 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 09:44:58,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:58,270 INFO L225 Difference]: With dead ends: 11587 [2020-12-22 09:44:58,270 INFO L226 Difference]: Without dead ends: 10089 [2020-12-22 09:44:58,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 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 09:44:58,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10089 states. [2020-12-22 09:44:58,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10089 to 7529. [2020-12-22 09:44:58,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7529 states. [2020-12-22 09:44:58,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7529 states to 7529 states and 11037 transitions. [2020-12-22 09:44:58,725 INFO L78 Accepts]: Start accepts. Automaton has 7529 states and 11037 transitions. Word has length 78 [2020-12-22 09:44:58,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:58,725 INFO L481 AbstractCegarLoop]: Abstraction has 7529 states and 11037 transitions. [2020-12-22 09:44:58,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:44:58,725 INFO L276 IsEmpty]: Start isEmpty. Operand 7529 states and 11037 transitions. [2020-12-22 09:44:58,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 09:44:58,728 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:58,728 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:44:58,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:44:58,729 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:58,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:58,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1802138178, now seen corresponding path program 1 times [2020-12-22 09:44:58,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:58,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652157719] [2020-12-22 09:44:58,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:58,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:58,837 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 09:44:58,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652157719] [2020-12-22 09:44:58,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:58,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:44:58,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56004868] [2020-12-22 09:44:58,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:44:58,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:58,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:44:58,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:44:58,839 INFO L87 Difference]: Start difference. First operand 7529 states and 11037 transitions. Second operand 6 states. [2020-12-22 09:44:59,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:59,785 INFO L93 Difference]: Finished difference Result 13083 states and 19034 transitions. [2020-12-22 09:44:59,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:44:59,786 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 09:44:59,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:59,816 INFO L225 Difference]: With dead ends: 13083 [2020-12-22 09:44:59,817 INFO L226 Difference]: Without dead ends: 11585 [2020-12-22 09:44:59,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 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 09:44:59,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11585 states. [2020-12-22 09:45:00,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11585 to 9025. [2020-12-22 09:45:00,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9025 states. [2020-12-22 09:45:00,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9025 states to 9025 states and 13165 transitions. [2020-12-22 09:45:00,380 INFO L78 Accepts]: Start accepts. Automaton has 9025 states and 13165 transitions. Word has length 78 [2020-12-22 09:45:00,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:00,380 INFO L481 AbstractCegarLoop]: Abstraction has 9025 states and 13165 transitions. [2020-12-22 09:45:00,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:45:00,381 INFO L276 IsEmpty]: Start isEmpty. Operand 9025 states and 13165 transitions. [2020-12-22 09:45:00,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:45:00,384 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:00,384 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:00,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:45:00,384 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:00,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:00,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1946065318, now seen corresponding path program 1 times [2020-12-22 09:45:00,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:00,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887144381] [2020-12-22 09:45:00,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:00,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:00,450 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:00,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887144381] [2020-12-22 09:45:00,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:00,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:45:00,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857310785] [2020-12-22 09:45:00,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:45:00,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:00,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:45:00,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:45:00,453 INFO L87 Difference]: Start difference. First operand 9025 states and 13165 transitions. Second operand 3 states. [2020-12-22 09:45:00,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:00,839 INFO L93 Difference]: Finished difference Result 13806 states and 20037 transitions. [2020-12-22 09:45:00,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:45:00,840 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 09:45:00,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:00,860 INFO L225 Difference]: With dead ends: 13806 [2020-12-22 09:45:00,860 INFO L226 Difference]: Without dead ends: 7068 [2020-12-22 09:45:00,874 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 09:45:00,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7068 states. [2020-12-22 09:45:01,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7068 to 7066. [2020-12-22 09:45:01,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7066 states. [2020-12-22 09:45:01,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7066 states to 7066 states and 10382 transitions. [2020-12-22 09:45:01,366 INFO L78 Accepts]: Start accepts. Automaton has 7066 states and 10382 transitions. Word has length 80 [2020-12-22 09:45:01,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:01,366 INFO L481 AbstractCegarLoop]: Abstraction has 7066 states and 10382 transitions. [2020-12-22 09:45:01,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:45:01,366 INFO L276 IsEmpty]: Start isEmpty. Operand 7066 states and 10382 transitions. [2020-12-22 09:45:01,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:45:01,368 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:01,368 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:45:01,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:45:01,369 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:01,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:01,369 INFO L82 PathProgramCache]: Analyzing trace with hash -787636643, now seen corresponding path program 1 times [2020-12-22 09:45:01,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:01,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891764898] [2020-12-22 09:45:01,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:01,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:01,467 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:45:01,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891764898] [2020-12-22 09:45:01,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:01,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:45:01,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823539192] [2020-12-22 09:45:01,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:45:01,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:01,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:45:01,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:45:01,470 INFO L87 Difference]: Start difference. First operand 7066 states and 10382 transitions. Second operand 6 states. [2020-12-22 09:45:01,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:01,992 INFO L93 Difference]: Finished difference Result 11300 states and 16467 transitions. [2020-12-22 09:45:01,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:45:01,993 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 80 [2020-12-22 09:45:01,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:02,014 INFO L225 Difference]: With dead ends: 11300 [2020-12-22 09:45:02,014 INFO L226 Difference]: Without dead ends: 10242 [2020-12-22 09:45:02,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 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 09:45:02,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10242 states. [2020-12-22 09:45:02,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10242 to 8122. [2020-12-22 09:45:02,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8122 states. [2020-12-22 09:45:02,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8122 states to 8122 states and 11886 transitions. [2020-12-22 09:45:02,392 INFO L78 Accepts]: Start accepts. Automaton has 8122 states and 11886 transitions. Word has length 80 [2020-12-22 09:45:02,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:02,393 INFO L481 AbstractCegarLoop]: Abstraction has 8122 states and 11886 transitions. [2020-12-22 09:45:02,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:45:02,393 INFO L276 IsEmpty]: Start isEmpty. Operand 8122 states and 11886 transitions. [2020-12-22 09:45:02,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:45:02,396 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:02,397 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:45:02,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:45:02,397 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:02,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:02,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1630109958, now seen corresponding path program 1 times [2020-12-22 09:45:02,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:02,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396268898] [2020-12-22 09:45:02,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:02,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:02,503 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:02,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396268898] [2020-12-22 09:45:02,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:02,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:45:02,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026067416] [2020-12-22 09:45:02,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:45:02,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:02,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:45:02,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:45:02,507 INFO L87 Difference]: Start difference. First operand 8122 states and 11886 transitions. Second operand 3 states. [2020-12-22 09:45:02,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:02,762 INFO L93 Difference]: Finished difference Result 11030 states and 16024 transitions. [2020-12-22 09:45:02,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:45:02,763 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:45:02,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:02,777 INFO L225 Difference]: With dead ends: 11030 [2020-12-22 09:45:02,778 INFO L226 Difference]: Without dead ends: 5220 [2020-12-22 09:45:02,788 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 09:45:02,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5220 states. [2020-12-22 09:45:03,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5220 to 5218. [2020-12-22 09:45:03,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5218 states. [2020-12-22 09:45:03,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5218 states to 5218 states and 7706 transitions. [2020-12-22 09:45:03,100 INFO L78 Accepts]: Start accepts. Automaton has 5218 states and 7706 transitions. Word has length 81 [2020-12-22 09:45:03,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:03,100 INFO L481 AbstractCegarLoop]: Abstraction has 5218 states and 7706 transitions. [2020-12-22 09:45:03,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:45:03,100 INFO L276 IsEmpty]: Start isEmpty. Operand 5218 states and 7706 transitions. [2020-12-22 09:45:03,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:45:03,102 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:03,102 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:45:03,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:45:03,103 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:03,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:03,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1078255044, now seen corresponding path program 1 times [2020-12-22 09:45:03,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:03,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898024666] [2020-12-22 09:45:03,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:03,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:03,168 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:03,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898024666] [2020-12-22 09:45:03,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:03,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:45:03,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678719406] [2020-12-22 09:45:03,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:45:03,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:03,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:45:03,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:45:03,174 INFO L87 Difference]: Start difference. First operand 5218 states and 7706 transitions. Second operand 3 states. [2020-12-22 09:45:03,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:03,355 INFO L93 Difference]: Finished difference Result 6674 states and 9754 transitions. [2020-12-22 09:45:03,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:45:03,357 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:45:03,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:03,366 INFO L225 Difference]: With dead ends: 6674 [2020-12-22 09:45:03,367 INFO L226 Difference]: Without dead ends: 3768 [2020-12-22 09:45:03,375 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 09:45:03,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3768 states. [2020-12-22 09:45:03,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3768 to 3766. [2020-12-22 09:45:03,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3766 states. [2020-12-22 09:45:03,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3766 states to 3766 states and 5638 transitions. [2020-12-22 09:45:03,588 INFO L78 Accepts]: Start accepts. Automaton has 3766 states and 5638 transitions. Word has length 81 [2020-12-22 09:45:03,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:03,589 INFO L481 AbstractCegarLoop]: Abstraction has 3766 states and 5638 transitions. [2020-12-22 09:45:03,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:45:03,589 INFO L276 IsEmpty]: Start isEmpty. Operand 3766 states and 5638 transitions. [2020-12-22 09:45:03,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:45:03,592 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:03,592 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:45:03,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:45:03,593 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:03,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:03,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1165373838, now seen corresponding path program 1 times [2020-12-22 09:45:03,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:03,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157741999] [2020-12-22 09:45:03,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:03,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:03,699 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:03,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157741999] [2020-12-22 09:45:03,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:03,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:45:03,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638839243] [2020-12-22 09:45:03,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:45:03,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:03,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:45:03,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:45:03,703 INFO L87 Difference]: Start difference. First operand 3766 states and 5638 transitions. Second operand 3 states. [2020-12-22 09:45:03,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:03,804 INFO L93 Difference]: Finished difference Result 4496 states and 6652 transitions. [2020-12-22 09:45:03,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:45:03,805 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:45:03,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:03,812 INFO L225 Difference]: With dead ends: 4496 [2020-12-22 09:45:03,812 INFO L226 Difference]: Without dead ends: 3042 [2020-12-22 09:45:03,815 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 09:45:03,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3042 states. [2020-12-22 09:45:03,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3042 to 3040. [2020-12-22 09:45:03,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3040 states. [2020-12-22 09:45:03,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3040 states to 3040 states and 4615 transitions. [2020-12-22 09:45:03,915 INFO L78 Accepts]: Start accepts. Automaton has 3040 states and 4615 transitions. Word has length 81 [2020-12-22 09:45:03,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:03,915 INFO L481 AbstractCegarLoop]: Abstraction has 3040 states and 4615 transitions. [2020-12-22 09:45:03,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:45:03,916 INFO L276 IsEmpty]: Start isEmpty. Operand 3040 states and 4615 transitions. [2020-12-22 09:45:03,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:45:03,917 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:03,917 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] [2020-12-22 09:45:03,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:45:03,918 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:03,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:03,919 INFO L82 PathProgramCache]: Analyzing trace with hash 2010318248, now seen corresponding path program 1 times [2020-12-22 09:45:03,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:03,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069183048] [2020-12-22 09:45:03,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:03,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:04,240 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 14 [2020-12-22 09:45:04,305 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:04,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069183048] [2020-12-22 09:45:04,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099886082] [2020-12-22 09:45:04,306 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 09:45:04,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:04,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 09:45:04,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:45:04,982 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:45:04,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:45:04,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2020-12-22 09:45:04,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856820833] [2020-12-22 09:45:04,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 09:45:04,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:04,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 09:45:04,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-12-22 09:45:04,985 INFO L87 Difference]: Start difference. First operand 3040 states and 4615 transitions. Second operand 12 states. [2020-12-22 09:45:07,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:07,165 INFO L93 Difference]: Finished difference Result 6473 states and 9264 transitions. [2020-12-22 09:45:07,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 09:45:07,166 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 81 [2020-12-22 09:45:07,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:07,177 INFO L225 Difference]: With dead ends: 6473 [2020-12-22 09:45:07,177 INFO L226 Difference]: Without dead ends: 5745 [2020-12-22 09:45:07,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=227, Invalid=829, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 09:45:07,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5745 states. [2020-12-22 09:45:07,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5745 to 4832. [2020-12-22 09:45:07,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4832 states. [2020-12-22 09:45:07,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4832 states to 4832 states and 6904 transitions. [2020-12-22 09:45:07,474 INFO L78 Accepts]: Start accepts. Automaton has 4832 states and 6904 transitions. Word has length 81 [2020-12-22 09:45:07,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:07,474 INFO L481 AbstractCegarLoop]: Abstraction has 4832 states and 6904 transitions. [2020-12-22 09:45:07,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 09:45:07,475 INFO L276 IsEmpty]: Start isEmpty. Operand 4832 states and 6904 transitions. [2020-12-22 09:45:07,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:45:07,476 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:07,476 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:45:07,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:45:07,690 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:07,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:07,691 INFO L82 PathProgramCache]: Analyzing trace with hash -599443483, now seen corresponding path program 1 times [2020-12-22 09:45:07,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:07,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084317503] [2020-12-22 09:45:07,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:07,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:08,044 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:08,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084317503] [2020-12-22 09:45:08,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360023226] [2020-12-22 09:45:08,049 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 09:45:08,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:08,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:45:08,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:45:08,542 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:45:09,016 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:09,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:45:09,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:45:09,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081223161] [2020-12-22 09:45:09,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:45:09,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:09,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:45:09,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:45:09,018 INFO L87 Difference]: Start difference. First operand 4832 states and 6904 transitions. Second operand 17 states. [2020-12-22 09:45:09,182 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2020-12-22 09:45:09,344 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-12-22 09:45:09,514 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:45:11,417 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2020-12-22 09:45:11,940 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2020-12-22 09:45:12,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:12,961 INFO L93 Difference]: Finished difference Result 14950 states and 20060 transitions. [2020-12-22 09:45:12,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:45:12,962 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 82 [2020-12-22 09:45:12,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:12,988 INFO L225 Difference]: With dead ends: 14950 [2020-12-22 09:45:12,988 INFO L226 Difference]: Without dead ends: 12643 [2020-12-22 09:45:12,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=303, Invalid=957, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 09:45:13,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12643 states. [2020-12-22 09:45:13,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12643 to 8863. [2020-12-22 09:45:13,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8863 states. [2020-12-22 09:45:13,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8863 states to 8863 states and 12086 transitions. [2020-12-22 09:45:13,918 INFO L78 Accepts]: Start accepts. Automaton has 8863 states and 12086 transitions. Word has length 82 [2020-12-22 09:45:13,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:13,919 INFO L481 AbstractCegarLoop]: Abstraction has 8863 states and 12086 transitions. [2020-12-22 09:45:13,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:45:13,919 INFO L276 IsEmpty]: Start isEmpty. Operand 8863 states and 12086 transitions. [2020-12-22 09:45:13,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:45:13,921 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:13,921 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:45:14,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:45:14,136 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:14,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:14,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1731083323, now seen corresponding path program 1 times [2020-12-22 09:45:14,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:14,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215209063] [2020-12-22 09:45:14,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:14,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:14,420 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:14,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215209063] [2020-12-22 09:45:14,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270278962] [2020-12-22 09:45:14,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:45:14,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:14,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 09:45:14,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:45:14,864 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:45:15,241 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:15,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:45:15,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:45:15,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607578402] [2020-12-22 09:45:15,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:45:15,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:15,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:45:15,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:45:15,243 INFO L87 Difference]: Start difference. First operand 8863 states and 12086 transitions. Second operand 17 states. [2020-12-22 09:45:15,391 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2020-12-22 09:45:15,651 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2020-12-22 09:45:17,424 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2020-12-22 09:45:17,551 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2020-12-22 09:45:17,957 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2020-12-22 09:45:18,099 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2020-12-22 09:45:20,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:20,088 INFO L93 Difference]: Finished difference Result 32813 states and 43309 transitions. [2020-12-22 09:45:20,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:45:20,090 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 82 [2020-12-22 09:45:20,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:20,142 INFO L225 Difference]: With dead ends: 32813 [2020-12-22 09:45:20,143 INFO L226 Difference]: Without dead ends: 27297 [2020-12-22 09:45:20,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=303, Invalid=957, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 09:45:20,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27297 states. [2020-12-22 09:45:22,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27297 to 19671. [2020-12-22 09:45:22,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19671 states. [2020-12-22 09:45:22,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19671 states to 19671 states and 25820 transitions. [2020-12-22 09:45:22,051 INFO L78 Accepts]: Start accepts. Automaton has 19671 states and 25820 transitions. Word has length 82 [2020-12-22 09:45:22,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:22,052 INFO L481 AbstractCegarLoop]: Abstraction has 19671 states and 25820 transitions. [2020-12-22 09:45:22,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:45:22,052 INFO L276 IsEmpty]: Start isEmpty. Operand 19671 states and 25820 transitions. [2020-12-22 09:45:22,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:45:22,055 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:22,055 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:45:22,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 09:45:22,272 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:22,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:22,273 INFO L82 PathProgramCache]: Analyzing trace with hash -895278877, now seen corresponding path program 1 times [2020-12-22 09:45:22,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:22,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767385963] [2020-12-22 09:45:22,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:22,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:22,363 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 09:45:22,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767385963] [2020-12-22 09:45:22,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:22,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:45:22,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095345971] [2020-12-22 09:45:22,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:45:22,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:22,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:45:22,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:45:22,365 INFO L87 Difference]: Start difference. First operand 19671 states and 25820 transitions. Second operand 6 states. [2020-12-22 09:45:23,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:23,465 INFO L93 Difference]: Finished difference Result 28225 states and 36926 transitions. [2020-12-22 09:45:23,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:45:23,466 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-12-22 09:45:23,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:23,482 INFO L225 Difference]: With dead ends: 28225 [2020-12-22 09:45:23,483 INFO L226 Difference]: Without dead ends: 10938 [2020-12-22 09:45:23,502 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 09:45:23,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10938 states. [2020-12-22 09:45:24,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10938 to 10938. [2020-12-22 09:45:24,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10938 states. [2020-12-22 09:45:24,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10938 states to 10938 states and 14590 transitions. [2020-12-22 09:45:24,499 INFO L78 Accepts]: Start accepts. Automaton has 10938 states and 14590 transitions. Word has length 82 [2020-12-22 09:45:24,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:24,499 INFO L481 AbstractCegarLoop]: Abstraction has 10938 states and 14590 transitions. [2020-12-22 09:45:24,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:45:24,500 INFO L276 IsEmpty]: Start isEmpty. Operand 10938 states and 14590 transitions. [2020-12-22 09:45:24,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:45:24,502 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:24,502 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:45:24,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 09:45:24,502 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:24,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:24,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1328829219, now seen corresponding path program 1 times [2020-12-22 09:45:24,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:24,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110952070] [2020-12-22 09:45:24,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:24,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:24,704 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 09:45:24,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110952070] [2020-12-22 09:45:24,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:24,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:45:24,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60419972] [2020-12-22 09:45:24,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:45:24,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:24,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:45:24,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:45:24,707 INFO L87 Difference]: Start difference. First operand 10938 states and 14590 transitions. Second operand 6 states. [2020-12-22 09:45:26,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:26,028 INFO L93 Difference]: Finished difference Result 17371 states and 22838 transitions. [2020-12-22 09:45:26,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:45:26,029 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-12-22 09:45:26,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:26,041 INFO L225 Difference]: With dead ends: 17371 [2020-12-22 09:45:26,041 INFO L226 Difference]: Without dead ends: 8821 [2020-12-22 09:45:26,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:45:26,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8821 states. [2020-12-22 09:45:26,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8821 to 8821. [2020-12-22 09:45:26,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8821 states. [2020-12-22 09:45:26,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8821 states to 8821 states and 11812 transitions. [2020-12-22 09:45:26,767 INFO L78 Accepts]: Start accepts. Automaton has 8821 states and 11812 transitions. Word has length 82 [2020-12-22 09:45:26,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:26,768 INFO L481 AbstractCegarLoop]: Abstraction has 8821 states and 11812 transitions. [2020-12-22 09:45:26,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:45:26,768 INFO L276 IsEmpty]: Start isEmpty. Operand 8821 states and 11812 transitions. [2020-12-22 09:45:26,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:45:26,769 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:26,769 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:45:26,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 09:45:26,770 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:26,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:26,770 INFO L82 PathProgramCache]: Analyzing trace with hash 2082803715, now seen corresponding path program 1 times [2020-12-22 09:45:26,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:26,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133436595] [2020-12-22 09:45:26,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:26,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:26,858 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 09:45:26,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133436595] [2020-12-22 09:45:26,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:26,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:45:26,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836267382] [2020-12-22 09:45:26,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:45:26,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:26,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:45:26,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:45:26,861 INFO L87 Difference]: Start difference. First operand 8821 states and 11812 transitions. Second operand 6 states. [2020-12-22 09:45:28,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:28,158 INFO L93 Difference]: Finished difference Result 19291 states and 25248 transitions. [2020-12-22 09:45:28,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:45:28,159 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-12-22 09:45:28,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:28,172 INFO L225 Difference]: With dead ends: 19291 [2020-12-22 09:45:28,172 INFO L226 Difference]: Without dead ends: 12794 [2020-12-22 09:45:28,178 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 09:45:28,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12794 states. [2020-12-22 09:45:29,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12794 to 11824. [2020-12-22 09:45:29,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11824 states. [2020-12-22 09:45:29,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11824 states to 11824 states and 15615 transitions. [2020-12-22 09:45:29,290 INFO L78 Accepts]: Start accepts. Automaton has 11824 states and 15615 transitions. Word has length 82 [2020-12-22 09:45:29,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:29,290 INFO L481 AbstractCegarLoop]: Abstraction has 11824 states and 15615 transitions. [2020-12-22 09:45:29,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:45:29,291 INFO L276 IsEmpty]: Start isEmpty. Operand 11824 states and 15615 transitions. [2020-12-22 09:45:29,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 09:45:29,293 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:29,293 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:45:29,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 09:45:29,293 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:29,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:29,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1931365342, now seen corresponding path program 1 times [2020-12-22 09:45:29,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:29,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912099254] [2020-12-22 09:45:29,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:29,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:29,630 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:29,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912099254] [2020-12-22 09:45:29,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632670849] [2020-12-22 09:45:29,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:45:29,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:29,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:45:29,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:45:30,271 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:45:30,655 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:30,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:45:30,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:45:30,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840873023] [2020-12-22 09:45:30,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:45:30,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:30,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:45:30,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:45:30,657 INFO L87 Difference]: Start difference. First operand 11824 states and 15615 transitions. Second operand 17 states. [2020-12-22 09:45:36,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:36,437 INFO L93 Difference]: Finished difference Result 49237 states and 62351 transitions. [2020-12-22 09:45:36,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:45:36,438 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 83 [2020-12-22 09:45:36,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:36,475 INFO L225 Difference]: With dead ends: 49237 [2020-12-22 09:45:36,476 INFO L226 Difference]: Without dead ends: 41211 [2020-12-22 09:45:36,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=312, Invalid=948, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 09:45:36,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41211 states. [2020-12-22 09:45:39,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41211 to 26445. [2020-12-22 09:45:39,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26445 states. [2020-12-22 09:45:39,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26445 states to 26445 states and 34001 transitions. [2020-12-22 09:45:39,123 INFO L78 Accepts]: Start accepts. Automaton has 26445 states and 34001 transitions. Word has length 83 [2020-12-22 09:45:39,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:39,123 INFO L481 AbstractCegarLoop]: Abstraction has 26445 states and 34001 transitions. [2020-12-22 09:45:39,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:45:39,123 INFO L276 IsEmpty]: Start isEmpty. Operand 26445 states and 34001 transitions. [2020-12-22 09:45:39,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 09:45:39,126 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:39,127 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:45:39,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:45:39,340 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:39,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:39,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1033972064, now seen corresponding path program 1 times [2020-12-22 09:45:39,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:39,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816889381] [2020-12-22 09:45:39,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:39,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:39,425 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 09:45:39,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816889381] [2020-12-22 09:45:39,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:39,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:45:39,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390858882] [2020-12-22 09:45:39,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:45:39,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:39,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:45:39,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:45:39,427 INFO L87 Difference]: Start difference. First operand 26445 states and 34001 transitions. Second operand 6 states. [2020-12-22 09:45:41,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:41,862 INFO L93 Difference]: Finished difference Result 44728 states and 56973 transitions. [2020-12-22 09:45:41,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:45:41,863 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-12-22 09:45:41,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:41,884 INFO L225 Difference]: With dead ends: 44728 [2020-12-22 09:45:41,884 INFO L226 Difference]: Without dead ends: 20771 [2020-12-22 09:45:41,900 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 09:45:41,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20771 states. [2020-12-22 09:45:43,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20771 to 20771. [2020-12-22 09:45:43,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20771 states. [2020-12-22 09:45:43,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20771 states to 20771 states and 26465 transitions. [2020-12-22 09:45:43,924 INFO L78 Accepts]: Start accepts. Automaton has 20771 states and 26465 transitions. Word has length 83 [2020-12-22 09:45:43,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:43,924 INFO L481 AbstractCegarLoop]: Abstraction has 20771 states and 26465 transitions. [2020-12-22 09:45:43,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:45:43,924 INFO L276 IsEmpty]: Start isEmpty. Operand 20771 states and 26465 transitions. [2020-12-22 09:45:43,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 09:45:43,929 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:43,930 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:45:43,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 09:45:43,930 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:43,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:43,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1324644796, now seen corresponding path program 1 times [2020-12-22 09:45:43,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:43,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80848632] [2020-12-22 09:45:43,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:43,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:46,348 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:46,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80848632] [2020-12-22 09:45:46,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847350343] [2020-12-22 09:45:46,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:45:46,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:46,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 09:45:46,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:45:47,308 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:45:47,741 WARN L197 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 40 [2020-12-22 09:45:48,620 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2020-12-22 09:45:48,692 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:48,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:45:48,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 12] total 39 [2020-12-22 09:45:48,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577128284] [2020-12-22 09:45:48,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 09:45:48,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:48,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 09:45:48,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1380, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 09:45:48,695 INFO L87 Difference]: Start difference. First operand 20771 states and 26465 transitions. Second operand 39 states. [2020-12-22 09:45:49,365 WARN L197 SmtUtils]: Spent 570.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 84 [2020-12-22 09:45:50,258 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2020-12-22 09:45:50,481 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2020-12-22 09:45:50,709 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2020-12-22 09:45:50,979 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 29 [2020-12-22 09:45:51,438 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 31 [2020-12-22 09:45:51,813 WARN L197 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2020-12-22 09:45:52,192 WARN L197 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-12-22 09:45:52,662 WARN L197 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2020-12-22 09:45:53,146 WARN L197 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2020-12-22 09:45:53,772 WARN L197 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 67 [2020-12-22 09:45:54,486 WARN L197 SmtUtils]: Spent 577.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 93 [2020-12-22 09:45:55,379 WARN L197 SmtUtils]: Spent 756.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 100 [2020-12-22 09:45:56,235 WARN L197 SmtUtils]: Spent 719.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 97 [2020-12-22 09:45:56,803 WARN L197 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 81 [2020-12-22 09:45:57,402 WARN L197 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 81 [2020-12-22 09:45:57,872 WARN L197 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-12-22 09:45:58,448 WARN L197 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 77 [2020-12-22 09:45:58,907 WARN L197 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2020-12-22 09:45:59,478 WARN L197 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-12-22 09:46:00,121 WARN L197 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 77 [2020-12-22 09:46:00,448 WARN L197 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-12-22 09:46:00,849 WARN L197 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-12-22 09:46:01,550 WARN L197 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-12-22 09:46:02,210 WARN L197 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 74 [2020-12-22 09:46:02,709 WARN L197 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-12-22 09:46:03,234 WARN L197 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-12-22 09:46:03,632 WARN L197 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-12-22 09:46:04,057 WARN L197 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-12-22 09:46:04,662 WARN L197 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 74 [2020-12-22 09:46:05,133 WARN L197 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2020-12-22 09:46:05,449 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 33 [2020-12-22 09:46:06,106 WARN L197 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-12-22 09:46:06,530 WARN L197 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2020-12-22 09:46:06,949 WARN L197 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 37 [2020-12-22 09:46:07,459 WARN L197 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2020-12-22 09:46:08,056 WARN L197 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 71 [2020-12-22 09:46:08,392 WARN L197 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-12-22 09:46:09,145 WARN L197 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 43 [2020-12-22 09:46:09,571 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-12-22 09:46:09,885 WARN L197 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-12-22 09:46:10,209 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:46:10,956 WARN L197 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-12-22 09:46:11,309 WARN L197 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-12-22 09:46:11,682 WARN L197 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-12-22 09:46:12,216 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 09:46:12,772 WARN L197 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2020-12-22 09:46:13,249 WARN L197 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2020-12-22 09:46:13,870 WARN L197 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2020-12-22 09:46:14,650 WARN L197 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-12-22 09:46:16,034 WARN L197 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 66 [2020-12-22 09:46:16,680 WARN L197 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2020-12-22 09:46:17,694 WARN L197 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 79 [2020-12-22 09:46:18,419 WARN L197 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 79 [2020-12-22 09:46:18,881 WARN L197 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-12-22 09:46:19,417 WARN L197 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2020-12-22 09:46:20,029 WARN L197 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 69 [2020-12-22 09:46:20,407 WARN L197 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2020-12-22 09:46:20,909 WARN L197 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 75 [2020-12-22 09:46:21,480 WARN L197 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 79 [2020-12-22 09:46:21,913 WARN L197 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2020-12-22 09:46:22,954 WARN L197 SmtUtils]: Spent 704.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 91 [2020-12-22 09:46:23,657 WARN L197 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 91 [2020-12-22 09:46:24,187 WARN L197 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 82 [2020-12-22 09:46:24,552 WARN L197 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-12-22 09:46:25,044 WARN L197 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-12-22 09:46:25,638 WARN L197 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 86 [2020-12-22 09:46:26,812 WARN L197 SmtUtils]: Spent 929.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 114 [2020-12-22 09:46:27,277 WARN L197 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-12-22 09:46:27,861 WARN L197 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-12-22 09:46:28,309 WARN L197 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-12-22 09:46:29,456 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:46:30,307 WARN L197 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2020-12-22 09:46:32,319 WARN L197 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2020-12-22 09:46:33,014 WARN L197 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 84 [2020-12-22 09:46:33,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:33,957 INFO L93 Difference]: Finished difference Result 34675 states and 43895 transitions. [2020-12-22 09:46:33,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-12-22 09:46:33,959 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 84 [2020-12-22 09:46:33,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:33,997 INFO L225 Difference]: With dead ends: 34675 [2020-12-22 09:46:33,998 INFO L226 Difference]: Without dead ends: 27079 [2020-12-22 09:46:34,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3707 ImplicationChecksByTransitivity, 38.1s TimeCoverageRelationStatistics Valid=2385, Invalid=12867, Unknown=0, NotChecked=0, Total=15252 [2020-12-22 09:46:34,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27079 states. [2020-12-22 09:46:36,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27079 to 18820. [2020-12-22 09:46:36,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18820 states. [2020-12-22 09:46:36,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18820 states to 18820 states and 24108 transitions. [2020-12-22 09:46:36,213 INFO L78 Accepts]: Start accepts. Automaton has 18820 states and 24108 transitions. Word has length 84 [2020-12-22 09:46:36,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:36,213 INFO L481 AbstractCegarLoop]: Abstraction has 18820 states and 24108 transitions. [2020-12-22 09:46:36,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 09:46:36,214 INFO L276 IsEmpty]: Start isEmpty. Operand 18820 states and 24108 transitions. [2020-12-22 09:46:36,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 09:46:36,216 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:36,216 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:46:36,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 09:46:36,430 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:36,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:36,431 INFO L82 PathProgramCache]: Analyzing trace with hash -179145348, now seen corresponding path program 1 times [2020-12-22 09:46:36,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:36,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210355500] [2020-12-22 09:46:36,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:36,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:37,075 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 09:46:37,463 WARN L197 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2020-12-22 09:46:37,764 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:37,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210355500] [2020-12-22 09:46:37,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992383129] [2020-12-22 09:46:37,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:46:37,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:38,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 09:46:38,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:46:38,513 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:46:38,919 WARN L197 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 33 [2020-12-22 09:46:39,474 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:39,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:46:39,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2020-12-22 09:46:39,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320916513] [2020-12-22 09:46:39,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 09:46:39,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:39,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 09:46:39,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2020-12-22 09:46:39,476 INFO L87 Difference]: Start difference. First operand 18820 states and 24108 transitions. Second operand 24 states. [2020-12-22 09:46:39,718 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 09:46:40,088 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2020-12-22 09:46:40,284 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2020-12-22 09:46:40,505 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-12-22 09:46:40,718 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2020-12-22 09:46:41,017 WARN L197 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2020-12-22 09:46:41,336 WARN L197 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-12-22 09:46:41,935 WARN L197 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-12-22 09:46:42,304 WARN L197 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2020-12-22 09:46:42,749 WARN L197 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-12-22 09:46:43,247 WARN L197 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2020-12-22 09:46:43,768 WARN L197 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2020-12-22 09:46:44,323 WARN L197 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2020-12-22 09:46:44,682 WARN L197 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2020-12-22 09:46:45,122 WARN L197 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2020-12-22 09:46:45,380 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-12-22 09:46:45,676 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-12-22 09:46:45,942 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2020-12-22 09:46:46,201 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-12-22 09:46:46,481 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2020-12-22 09:46:46,740 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 09:46:46,941 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2020-12-22 09:46:47,402 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-12-22 09:46:49,313 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-12-22 09:46:49,490 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2020-12-22 09:46:49,708 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-12-22 09:46:49,948 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-22 09:46:50,198 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-22 09:46:50,452 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-12-22 09:46:50,735 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-22 09:46:50,972 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-12-22 09:46:51,316 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-12-22 09:46:52,118 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-12-22 09:46:52,756 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 09:46:53,002 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-12-22 09:46:53,918 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2020-12-22 09:46:55,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:55,310 INFO L93 Difference]: Finished difference Result 31048 states and 39838 transitions. [2020-12-22 09:46:55,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-12-22 09:46:55,310 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 84 [2020-12-22 09:46:55,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:55,329 INFO L225 Difference]: With dead ends: 31048 [2020-12-22 09:46:55,330 INFO L226 Difference]: Without dead ends: 20179 [2020-12-22 09:46:55,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1455 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=895, Invalid=4507, Unknown=0, NotChecked=0, Total=5402 [2020-12-22 09:46:55,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20179 states. [2020-12-22 09:46:56,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20179 to 12419. [2020-12-22 09:46:56,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12419 states. [2020-12-22 09:46:56,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12419 states to 12419 states and 16417 transitions. [2020-12-22 09:46:56,713 INFO L78 Accepts]: Start accepts. Automaton has 12419 states and 16417 transitions. Word has length 84 [2020-12-22 09:46:56,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:56,713 INFO L481 AbstractCegarLoop]: Abstraction has 12419 states and 16417 transitions. [2020-12-22 09:46:56,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 09:46:56,713 INFO L276 IsEmpty]: Start isEmpty. Operand 12419 states and 16417 transitions. [2020-12-22 09:46:56,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-22 09:46:56,714 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:56,714 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] [2020-12-22 09:46:56,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 09:46:56,929 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:56,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:56,930 INFO L82 PathProgramCache]: Analyzing trace with hash -68902190, now seen corresponding path program 1 times [2020-12-22 09:46:56,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:56,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783407677] [2020-12-22 09:46:56,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:56,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:57,745 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-12-22 09:46:57,897 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2020-12-22 09:46:58,197 WARN L197 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 27 [2020-12-22 09:46:58,851 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:58,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783407677] [2020-12-22 09:46:58,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362913490] [2020-12-22 09:46:58,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:46:59,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:59,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 09:46:59,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:46:59,812 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:47:00,152 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 28 [2020-12-22 09:47:00,885 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:47:00,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:47:00,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13] total 30 [2020-12-22 09:47:00,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831336704] [2020-12-22 09:47:00,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 09:47:00,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:00,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 09:47:00,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=795, Unknown=0, NotChecked=0, Total=870 [2020-12-22 09:47:00,887 INFO L87 Difference]: Start difference. First operand 12419 states and 16417 transitions. Second operand 30 states. [2020-12-22 09:47:01,280 WARN L197 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 30 [2020-12-22 09:47:01,793 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 18 [2020-12-22 09:47:02,037 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 19 [2020-12-22 09:47:02,372 WARN L197 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 26 [2020-12-22 09:47:02,924 WARN L197 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 32 [2020-12-22 09:47:03,600 WARN L197 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 41 [2020-12-22 09:47:04,645 WARN L197 SmtUtils]: Spent 965.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 75 [2020-12-22 09:47:05,544 WARN L197 SmtUtils]: Spent 836.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 67 [2020-12-22 09:47:06,387 WARN L197 SmtUtils]: Spent 661.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2020-12-22 09:47:06,790 WARN L197 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2020-12-22 09:47:07,136 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-12-22 09:47:07,809 WARN L197 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 52 [2020-12-22 09:47:08,073 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-12-22 09:47:08,711 WARN L197 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 48 [2020-12-22 09:47:09,190 WARN L197 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 42 [2020-12-22 09:47:09,897 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 09:47:10,260 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2020-12-22 09:47:11,061 WARN L197 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 48 [2020-12-22 09:47:12,372 WARN L197 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 92 DAG size of output: 83 [2020-12-22 09:47:13,135 WARN L197 SmtUtils]: Spent 653.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 56 [2020-12-22 09:47:13,577 WARN L197 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 47 [2020-12-22 09:47:14,310 WARN L197 SmtUtils]: Spent 598.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-12-22 09:47:15,661 WARN L197 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 116 DAG size of output: 87 [2020-12-22 09:47:16,750 WARN L197 SmtUtils]: Spent 994.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 78 [2020-12-22 09:47:17,505 WARN L197 SmtUtils]: Spent 658.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 51 [2020-12-22 09:47:18,487 WARN L197 SmtUtils]: Spent 826.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2020-12-22 09:47:19,320 WARN L197 SmtUtils]: Spent 735.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2020-12-22 09:47:20,581 WARN L197 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 114 DAG size of output: 81 [2020-12-22 09:47:21,450 WARN L197 SmtUtils]: Spent 747.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2020-12-22 09:47:22,517 WARN L197 SmtUtils]: Spent 907.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 72 [2020-12-22 09:47:23,560 WARN L197 SmtUtils]: Spent 951.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 70 [2020-12-22 09:47:24,069 WARN L197 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2020-12-22 09:47:24,833 WARN L197 SmtUtils]: Spent 664.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 60 [2020-12-22 09:47:25,337 WARN L197 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2020-12-22 09:47:25,709 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-12-22 09:47:26,541 WARN L197 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2020-12-22 09:47:26,959 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2020-12-22 09:47:27,251 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2020-12-22 09:47:27,619 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2020-12-22 09:47:28,083 WARN L197 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 38 [2020-12-22 09:47:29,790 WARN L197 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 39 [2020-12-22 09:47:30,971 WARN L197 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2020-12-22 09:47:31,745 WARN L197 SmtUtils]: Spent 623.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 47 [2020-12-22 09:47:33,004 WARN L197 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 108 DAG size of output: 78 [2020-12-22 09:47:34,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:34,131 INFO L93 Difference]: Finished difference Result 21223 states and 27764 transitions. [2020-12-22 09:47:34,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-22 09:47:34,134 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 86 [2020-12-22 09:47:34,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:34,155 INFO L225 Difference]: With dead ends: 21223 [2020-12-22 09:47:34,155 INFO L226 Difference]: Without dead ends: 16804 [2020-12-22 09:47:34,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1443 ImplicationChecksByTransitivity, 30.0s TimeCoverageRelationStatistics Valid=1136, Invalid=5184, Unknown=0, NotChecked=0, Total=6320 [2020-12-22 09:47:34,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16804 states. [2020-12-22 09:47:35,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16804 to 10858. [2020-12-22 09:47:35,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10858 states. [2020-12-22 09:47:35,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10858 states to 10858 states and 14476 transitions. [2020-12-22 09:47:35,554 INFO L78 Accepts]: Start accepts. Automaton has 10858 states and 14476 transitions. Word has length 86 [2020-12-22 09:47:35,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:35,555 INFO L481 AbstractCegarLoop]: Abstraction has 10858 states and 14476 transitions. [2020-12-22 09:47:35,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 09:47:35,555 INFO L276 IsEmpty]: Start isEmpty. Operand 10858 states and 14476 transitions. [2020-12-22 09:47:35,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 09:47:35,559 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:35,559 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:47:35,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:47:35,763 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:35,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:35,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1962757225, now seen corresponding path program 1 times [2020-12-22 09:47:35,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:35,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539935392] [2020-12-22 09:47:35,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:35,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:36,225 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 14 [2020-12-22 09:47:36,361 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 46 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:47:36,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539935392] [2020-12-22 09:47:36,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968182244] [2020-12-22 09:47:36,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:47:36,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:36,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 09:47:36,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:47:37,285 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 12 proven. 81 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 09:47:37,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:47:37,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 15 [2020-12-22 09:47:37,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60837270] [2020-12-22 09:47:37,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 09:47:37,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:37,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 09:47:37,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-12-22 09:47:37,287 INFO L87 Difference]: Start difference. First operand 10858 states and 14476 transitions. Second operand 15 states. [2020-12-22 09:47:37,483 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-12-22 09:47:37,875 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2020-12-22 09:47:38,176 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-12-22 09:47:38,505 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-12-22 09:47:38,729 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 09:47:39,177 WARN L197 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:47:39,553 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 09:47:39,997 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-12-22 09:47:40,248 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:47:40,506 WARN L197 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:47:40,854 WARN L197 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:47:41,107 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-12-22 09:47:41,399 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 09:47:42,411 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 09:47:43,212 WARN L197 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-12-22 09:47:43,494 WARN L197 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:47:43,781 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:47:44,271 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-12-22 09:47:44,521 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2020-12-22 09:47:44,734 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2020-12-22 09:47:45,418 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2020-12-22 09:47:46,130 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2020-12-22 09:47:46,360 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-12-22 09:47:46,593 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-12-22 09:47:47,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:47,011 INFO L93 Difference]: Finished difference Result 23477 states and 30410 transitions. [2020-12-22 09:47:47,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 09:47:47,013 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 135 [2020-12-22 09:47:47,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:47,029 INFO L225 Difference]: With dead ends: 23477 [2020-12-22 09:47:47,029 INFO L226 Difference]: Without dead ends: 15499 [2020-12-22 09:47:47,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=341, Invalid=1381, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 09:47:47,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15499 states. [2020-12-22 09:47:49,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15499 to 15387. [2020-12-22 09:47:49,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15387 states. [2020-12-22 09:47:49,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15387 states to 15387 states and 19558 transitions. [2020-12-22 09:47:49,154 INFO L78 Accepts]: Start accepts. Automaton has 15387 states and 19558 transitions. Word has length 135 [2020-12-22 09:47:49,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:49,155 INFO L481 AbstractCegarLoop]: Abstraction has 15387 states and 19558 transitions. [2020-12-22 09:47:49,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 09:47:49,155 INFO L276 IsEmpty]: Start isEmpty. Operand 15387 states and 19558 transitions. [2020-12-22 09:47:49,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 09:47:49,158 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:49,158 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 09:47:49,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-22 09:47:49,364 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:49,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:49,365 INFO L82 PathProgramCache]: Analyzing trace with hash 789268438, now seen corresponding path program 1 times [2020-12-22 09:47:49,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:49,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878401045] [2020-12-22 09:47:49,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:49,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:49,791 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 18 [2020-12-22 09:47:49,936 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 16 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:47:49,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878401045] [2020-12-22 09:47:49,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314345995] [2020-12-22 09:47:49,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:47:50,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:50,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 09:47:50,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:47:50,640 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2020-12-22 09:47:51,318 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 09:47:51,683 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 29 [2020-12-22 09:47:52,281 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 20 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:47:52,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:47:52,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2020-12-22 09:47:52,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549891708] [2020-12-22 09:47:52,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 09:47:52,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:52,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 09:47:52,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2020-12-22 09:47:52,283 INFO L87 Difference]: Start difference. First operand 15387 states and 19558 transitions. Second operand 22 states. [2020-12-22 09:47:52,653 WARN L197 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-12-22 09:47:53,065 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-12-22 09:47:53,452 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-12-22 09:47:54,179 WARN L197 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-12-22 09:47:54,586 WARN L197 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-12-22 09:47:54,877 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-12-22 09:47:55,556 WARN L197 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-12-22 09:47:56,043 WARN L197 SmtUtils]: Spent 400.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-12-22 09:47:56,548 WARN L197 SmtUtils]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-12-22 09:47:57,110 WARN L197 SmtUtils]: Spent 401.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-12-22 09:47:58,291 WARN L197 SmtUtils]: Spent 416.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-12-22 09:48:00,018 WARN L197 SmtUtils]: Spent 597.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-12-22 09:48:01,155 WARN L197 SmtUtils]: Spent 971.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-12-22 09:48:03,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:03,526 INFO L93 Difference]: Finished difference Result 23287 states and 29174 transitions. [2020-12-22 09:48:03,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 09:48:03,529 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 136 [2020-12-22 09:48:03,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:03,548 INFO L225 Difference]: With dead ends: 23287 [2020-12-22 09:48:03,548 INFO L226 Difference]: Without dead ends: 17371 [2020-12-22 09:48:03,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=336, Invalid=996, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 09:48:03,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17371 states. [2020-12-22 09:48:06,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17371 to 15387. [2020-12-22 09:48:06,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15387 states. [2020-12-22 09:48:06,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15387 states to 15387 states and 19456 transitions. [2020-12-22 09:48:06,372 INFO L78 Accepts]: Start accepts. Automaton has 15387 states and 19456 transitions. Word has length 136 [2020-12-22 09:48:06,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:06,372 INFO L481 AbstractCegarLoop]: Abstraction has 15387 states and 19456 transitions. [2020-12-22 09:48:06,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 09:48:06,372 INFO L276 IsEmpty]: Start isEmpty. Operand 15387 states and 19456 transitions. [2020-12-22 09:48:06,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 09:48:06,376 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:06,376 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 09:48:06,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:48:06,577 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:06,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:06,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1426411414, now seen corresponding path program 1 times [2020-12-22 09:48:06,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:06,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631541] [2020-12-22 09:48:06,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:06,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:07,270 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 18 [2020-12-22 09:48:07,474 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 33 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:07,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631541] [2020-12-22 09:48:07,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870053454] [2020-12-22 09:48:07,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:48:07,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:07,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 09:48:07,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:48:08,757 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:48:08,829 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:48:09,199 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:48:09,916 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:48:10,933 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:48:12,024 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:48:13,260 INFO L757 QuantifierPusher]: Run 60 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug.