/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.3_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:40:51,735 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:40:51,740 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:40:51,786 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:40:51,787 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:40:51,789 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:40:51,792 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:40:51,796 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:40:51,799 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:40:51,801 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:40:51,804 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:40:51,806 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:40:51,807 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:40:51,809 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:40:51,829 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:40:51,840 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:40:51,846 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:40:51,852 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:40:51,862 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:40:51,871 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:40:51,880 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:40:51,884 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:40:51,888 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:40:51,892 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:40:51,896 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:40:51,908 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:40:51,909 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:40:51,913 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:40:51,915 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:40:51,916 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:40:51,917 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:40:51,918 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:40:51,919 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:40:51,919 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:40:51,920 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:40:51,922 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:40:51,924 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:40:51,981 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:40:51,982 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:40:51,984 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:40:51,985 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:40:51,985 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:40:51,985 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:40:51,985 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:40:51,986 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:40:51,986 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:40:51,986 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:40:51,987 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:40:51,987 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:40:51,987 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:40:51,987 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:40:51,988 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:40:51,988 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:40:51,988 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:40:51,988 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:40:51,989 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:40:51,989 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:40:51,989 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:40:51,989 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:40:51,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:40:51,990 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:40:51,990 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:40:51,990 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:40:52,501 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:40:52,547 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:40:52,554 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:40:52,556 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:40:52,557 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:40:52,559 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c [2020-12-22 09:40:52,676 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c472e64c/b7953d3241e34ddb93d7788dd9f8cbd5/FLAGf3f9decea [2020-12-22 09:40:54,078 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:40:54,082 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c [2020-12-22 09:40:54,148 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c472e64c/b7953d3241e34ddb93d7788dd9f8cbd5/FLAGf3f9decea [2020-12-22 09:40:54,372 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c472e64c/b7953d3241e34ddb93d7788dd9f8cbd5 [2020-12-22 09:40:54,377 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:40:54,383 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:40:54,390 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:40:54,390 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:40:54,396 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:40:54,399 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:40:54" (1/1) ... [2020-12-22 09:40:54,404 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e242d59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:40:54, skipping insertion in model container [2020-12-22 09:40:54,404 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:40:54" (1/1) ... [2020-12-22 09:40:54,417 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:40:54,721 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:40:55,408 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.3_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c[6582,6595] [2020-12-22 09:40:55,478 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.3_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c[11894,11907] [2020-12-22 09:40:56,856 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:40:56,878 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:40:56,970 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.3_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c[6582,6595] [2020-12-22 09:40:57,087 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.3_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c[11894,11907] [2020-12-22 09:40:58,049 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:40:58,098 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:40:58,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:40:58 WrapperNode [2020-12-22 09:40:58,099 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:40:58,102 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:40:58,102 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:40:58,102 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:40:58,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:40:58" (1/1) ... [2020-12-22 09:40:58,205 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:40:58" (1/1) ... [2020-12-22 09:40:58,676 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:40:58,677 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:40:58,678 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:40:58,678 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:40:58,691 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:40:58" (1/1) ... [2020-12-22 09:40:58,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:40:58" (1/1) ... [2020-12-22 09:40:58,868 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:40:58" (1/1) ... [2020-12-22 09:40:58,868 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:40:58" (1/1) ... [2020-12-22 09:40:59,202 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:40:58" (1/1) ... [2020-12-22 09:40:59,281 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:40:58" (1/1) ... [2020-12-22 09:40:59,348 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:40:58" (1/1) ... [2020-12-22 09:40:59,436 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:40:59,439 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:40:59,440 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:40:59,440 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:40:59,441 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:40:58" (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 09:40:59,613 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:40:59,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:40:59,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:40:59,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:41:06,417 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:41:06,418 INFO L299 CfgBuilder]: Removed 32 assume(true) statements. [2020-12-22 09:41:06,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:41:06 BoogieIcfgContainer [2020-12-22 09:41:06,422 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:41:06,424 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:41:06,424 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:41:06,427 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:41:06,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:40:54" (1/3) ... [2020-12-22 09:41:06,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6acc6250 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:41:06, skipping insertion in model container [2020-12-22 09:41:06,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:40:58" (2/3) ... [2020-12-22 09:41:06,430 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6acc6250 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:41:06, skipping insertion in model container [2020-12-22 09:41:06,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:41:06" (3/3) ... [2020-12-22 09:41:06,432 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c [2020-12-22 09:41:06,439 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:41:06,445 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:41:06,466 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:41:06,503 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:41:06,504 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:41:06,504 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:41:06,504 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:41:06,504 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:41:06,504 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:41:06,504 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:41:06,505 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:41:06,538 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states. [2020-12-22 09:41:06,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 09:41:06,547 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:06,547 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] [2020-12-22 09:41:06,548 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:06,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:06,555 INFO L82 PathProgramCache]: Analyzing trace with hash 975463267, now seen corresponding path program 1 times [2020-12-22 09:41:06,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:06,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814775843] [2020-12-22 09:41:06,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:06,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:06,783 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 09:41:06,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814775843] [2020-12-22 09:41:06,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:06,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:41:06,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256832720] [2020-12-22 09:41:06,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 09:41:06,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:06,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 09:41:06,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:41:06,810 INFO L87 Difference]: Start difference. First operand 877 states. Second operand 2 states. [2020-12-22 09:41:06,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:06,901 INFO L93 Difference]: Finished difference Result 1730 states and 3288 transitions. [2020-12-22 09:41:06,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 09:41:06,902 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 26 [2020-12-22 09:41:06,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:06,929 INFO L225 Difference]: With dead ends: 1730 [2020-12-22 09:41:06,929 INFO L226 Difference]: Without dead ends: 811 [2020-12-22 09:41:06,943 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 09:41:06,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2020-12-22 09:41:07,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 811. [2020-12-22 09:41:07,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 811 states. [2020-12-22 09:41:07,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 1532 transitions. [2020-12-22 09:41:07,070 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 1532 transitions. Word has length 26 [2020-12-22 09:41:07,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:07,071 INFO L481 AbstractCegarLoop]: Abstraction has 811 states and 1532 transitions. [2020-12-22 09:41:07,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 09:41:07,071 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 1532 transitions. [2020-12-22 09:41:07,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 09:41:07,073 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:07,073 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] [2020-12-22 09:41:07,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:41:07,074 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:07,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:07,076 INFO L82 PathProgramCache]: Analyzing trace with hash 157814817, now seen corresponding path program 1 times [2020-12-22 09:41:07,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:07,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700442250] [2020-12-22 09:41:07,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:07,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:07,228 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 09:41:07,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700442250] [2020-12-22 09:41:07,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:07,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:41:07,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174492185] [2020-12-22 09:41:07,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:41:07,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:07,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:41:07,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:41:07,234 INFO L87 Difference]: Start difference. First operand 811 states and 1532 transitions. Second operand 5 states. [2020-12-22 09:41:07,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:07,449 INFO L93 Difference]: Finished difference Result 850 states and 1591 transitions. [2020-12-22 09:41:07,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:41:07,450 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-12-22 09:41:07,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:07,457 INFO L225 Difference]: With dead ends: 850 [2020-12-22 09:41:07,457 INFO L226 Difference]: Without dead ends: 811 [2020-12-22 09:41:07,459 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 09:41:07,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2020-12-22 09:41:07,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 811. [2020-12-22 09:41:07,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 811 states. [2020-12-22 09:41:07,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 1516 transitions. [2020-12-22 09:41:07,486 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 1516 transitions. Word has length 26 [2020-12-22 09:41:07,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:07,486 INFO L481 AbstractCegarLoop]: Abstraction has 811 states and 1516 transitions. [2020-12-22 09:41:07,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:41:07,486 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 1516 transitions. [2020-12-22 09:41:07,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 09:41:07,488 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:07,488 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] [2020-12-22 09:41:07,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:41:07,489 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:07,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:07,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1324654887, now seen corresponding path program 1 times [2020-12-22 09:41:07,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:07,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466149475] [2020-12-22 09:41:07,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:07,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:07,579 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 09:41:07,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466149475] [2020-12-22 09:41:07,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:07,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:41:07,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097159053] [2020-12-22 09:41:07,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:41:07,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:07,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:41:07,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:41:07,583 INFO L87 Difference]: Start difference. First operand 811 states and 1516 transitions. Second operand 3 states. [2020-12-22 09:41:07,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:07,629 INFO L93 Difference]: Finished difference Result 875 states and 1616 transitions. [2020-12-22 09:41:07,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:41:07,630 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-12-22 09:41:07,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:07,639 INFO L225 Difference]: With dead ends: 875 [2020-12-22 09:41:07,640 INFO L226 Difference]: Without dead ends: 840 [2020-12-22 09:41:07,642 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 09:41:07,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2020-12-22 09:41:07,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 838. [2020-12-22 09:41:07,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 838 states. [2020-12-22 09:41:07,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 1559 transitions. [2020-12-22 09:41:07,695 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 1559 transitions. Word has length 41 [2020-12-22 09:41:07,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:07,696 INFO L481 AbstractCegarLoop]: Abstraction has 838 states and 1559 transitions. [2020-12-22 09:41:07,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:41:07,697 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 1559 transitions. [2020-12-22 09:41:07,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 09:41:07,702 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:07,702 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] [2020-12-22 09:41:07,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:41:07,702 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:07,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:07,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1376027727, now seen corresponding path program 1 times [2020-12-22 09:41:07,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:07,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496227549] [2020-12-22 09:41:07,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:07,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:07,892 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 09:41:07,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496227549] [2020-12-22 09:41:07,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:07,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:41:07,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400110466] [2020-12-22 09:41:07,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:41:07,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:07,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:41:07,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:41:07,903 INFO L87 Difference]: Start difference. First operand 838 states and 1559 transitions. Second operand 5 states. [2020-12-22 09:41:08,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:08,047 INFO L93 Difference]: Finished difference Result 1210 states and 2147 transitions. [2020-12-22 09:41:08,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:41:08,048 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-12-22 09:41:08,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:08,055 INFO L225 Difference]: With dead ends: 1210 [2020-12-22 09:41:08,055 INFO L226 Difference]: Without dead ends: 1148 [2020-12-22 09:41:08,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:41:08,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2020-12-22 09:41:08,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 898. [2020-12-22 09:41:08,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 898 states. [2020-12-22 09:41:08,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1652 transitions. [2020-12-22 09:41:08,087 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1652 transitions. Word has length 41 [2020-12-22 09:41:08,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:08,088 INFO L481 AbstractCegarLoop]: Abstraction has 898 states and 1652 transitions. [2020-12-22 09:41:08,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:41:08,088 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1652 transitions. [2020-12-22 09:41:08,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:41:08,090 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:08,090 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] [2020-12-22 09:41:08,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:41:08,090 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:08,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:08,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1902982177, now seen corresponding path program 1 times [2020-12-22 09:41:08,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:08,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274966202] [2020-12-22 09:41:08,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:08,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:08,168 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 09:41:08,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274966202] [2020-12-22 09:41:08,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:08,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:41:08,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374079105] [2020-12-22 09:41:08,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:41:08,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:08,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:41:08,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:41:08,173 INFO L87 Difference]: Start difference. First operand 898 states and 1652 transitions. Second operand 3 states. [2020-12-22 09:41:08,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:08,220 INFO L93 Difference]: Finished difference Result 1079 states and 1933 transitions. [2020-12-22 09:41:08,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:41:08,221 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-12-22 09:41:08,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:08,227 INFO L225 Difference]: With dead ends: 1079 [2020-12-22 09:41:08,227 INFO L226 Difference]: Without dead ends: 957 [2020-12-22 09:41:08,228 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 09:41:08,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2020-12-22 09:41:08,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 955. [2020-12-22 09:41:08,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 955 states. [2020-12-22 09:41:08,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 1738 transitions. [2020-12-22 09:41:08,258 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 1738 transitions. Word has length 43 [2020-12-22 09:41:08,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:08,259 INFO L481 AbstractCegarLoop]: Abstraction has 955 states and 1738 transitions. [2020-12-22 09:41:08,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:41:08,259 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 1738 transitions. [2020-12-22 09:41:08,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:41:08,260 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:08,261 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] [2020-12-22 09:41:08,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:41:08,261 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:08,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:08,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1836488665, now seen corresponding path program 1 times [2020-12-22 09:41:08,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:08,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491929938] [2020-12-22 09:41:08,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:08,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:08,375 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 09:41:08,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491929938] [2020-12-22 09:41:08,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:08,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:41:08,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285066345] [2020-12-22 09:41:08,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:41:08,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:08,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:41:08,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:41:08,378 INFO L87 Difference]: Start difference. First operand 955 states and 1738 transitions. Second operand 5 states. [2020-12-22 09:41:08,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:08,554 INFO L93 Difference]: Finished difference Result 1134 states and 2014 transitions. [2020-12-22 09:41:08,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:41:08,555 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-12-22 09:41:08,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:08,562 INFO L225 Difference]: With dead ends: 1134 [2020-12-22 09:41:08,562 INFO L226 Difference]: Without dead ends: 957 [2020-12-22 09:41:08,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:41:08,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2020-12-22 09:41:08,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 955. [2020-12-22 09:41:08,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 955 states. [2020-12-22 09:41:08,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 1735 transitions. [2020-12-22 09:41:08,599 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 1735 transitions. Word has length 43 [2020-12-22 09:41:08,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:08,600 INFO L481 AbstractCegarLoop]: Abstraction has 955 states and 1735 transitions. [2020-12-22 09:41:08,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:41:08,600 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 1735 transitions. [2020-12-22 09:41:08,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:41:08,601 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:08,601 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] [2020-12-22 09:41:08,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:41:08,602 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:08,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:08,603 INFO L82 PathProgramCache]: Analyzing trace with hash -47574589, now seen corresponding path program 1 times [2020-12-22 09:41:08,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:08,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815705087] [2020-12-22 09:41:08,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:08,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:08,672 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 09:41:08,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815705087] [2020-12-22 09:41:08,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:08,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:41:08,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73639619] [2020-12-22 09:41:08,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:41:08,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:08,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:41:08,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:41:08,686 INFO L87 Difference]: Start difference. First operand 955 states and 1735 transitions. Second operand 3 states. [2020-12-22 09:41:08,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:08,745 INFO L93 Difference]: Finished difference Result 1273 states and 2219 transitions. [2020-12-22 09:41:08,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:41:08,746 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-12-22 09:41:08,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:08,754 INFO L225 Difference]: With dead ends: 1273 [2020-12-22 09:41:08,754 INFO L226 Difference]: Without dead ends: 1096 [2020-12-22 09:41:08,756 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 09:41:08,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2020-12-22 09:41:08,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 1094. [2020-12-22 09:41:08,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1094 states. [2020-12-22 09:41:08,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 1940 transitions. [2020-12-22 09:41:08,807 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 1940 transitions. Word has length 43 [2020-12-22 09:41:08,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:08,809 INFO L481 AbstractCegarLoop]: Abstraction has 1094 states and 1940 transitions. [2020-12-22 09:41:08,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:41:08,809 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 1940 transitions. [2020-12-22 09:41:08,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:41:08,810 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:08,810 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] [2020-12-22 09:41:08,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:41:08,812 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:08,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:08,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1199933027, now seen corresponding path program 1 times [2020-12-22 09:41:08,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:08,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556777260] [2020-12-22 09:41:08,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:08,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:08,878 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 09:41:08,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556777260] [2020-12-22 09:41:08,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:08,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:41:08,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080825759] [2020-12-22 09:41:08,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:41:08,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:08,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:41:08,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:41:08,881 INFO L87 Difference]: Start difference. First operand 1094 states and 1940 transitions. Second operand 3 states. [2020-12-22 09:41:08,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:08,949 INFO L93 Difference]: Finished difference Result 1654 states and 2774 transitions. [2020-12-22 09:41:08,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:41:08,950 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-12-22 09:41:08,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:08,958 INFO L225 Difference]: With dead ends: 1654 [2020-12-22 09:41:08,959 INFO L226 Difference]: Without dead ends: 1338 [2020-12-22 09:41:08,960 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 09:41:08,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1338 states. [2020-12-22 09:41:09,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1338 to 1336. [2020-12-22 09:41:09,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1336 states. [2020-12-22 09:41:09,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1336 states to 1336 states and 2284 transitions. [2020-12-22 09:41:09,024 INFO L78 Accepts]: Start accepts. Automaton has 1336 states and 2284 transitions. Word has length 43 [2020-12-22 09:41:09,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:09,025 INFO L481 AbstractCegarLoop]: Abstraction has 1336 states and 2284 transitions. [2020-12-22 09:41:09,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:41:09,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1336 states and 2284 transitions. [2020-12-22 09:41:09,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 09:41:09,026 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:09,026 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] [2020-12-22 09:41:09,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:41:09,026 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:09,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:09,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1511296967, now seen corresponding path program 1 times [2020-12-22 09:41:09,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:09,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866459819] [2020-12-22 09:41:09,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:09,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:09,182 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 09:41:09,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866459819] [2020-12-22 09:41:09,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:09,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 09:41:09,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281805797] [2020-12-22 09:41:09,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 09:41:09,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:09,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 09:41:09,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:41:09,188 INFO L87 Difference]: Start difference. First operand 1336 states and 2284 transitions. Second operand 8 states. [2020-12-22 09:41:09,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:09,445 INFO L93 Difference]: Finished difference Result 1843 states and 2996 transitions. [2020-12-22 09:41:09,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 09:41:09,445 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2020-12-22 09:41:09,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:09,456 INFO L225 Difference]: With dead ends: 1843 [2020-12-22 09:41:09,456 INFO L226 Difference]: Without dead ends: 1841 [2020-12-22 09:41:09,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 09:41:09,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1841 states. [2020-12-22 09:41:09,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1841 to 1384. [2020-12-22 09:41:09,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1384 states. [2020-12-22 09:41:09,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 2328 transitions. [2020-12-22 09:41:09,557 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 2328 transitions. Word has length 44 [2020-12-22 09:41:09,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:09,557 INFO L481 AbstractCegarLoop]: Abstraction has 1384 states and 2328 transitions. [2020-12-22 09:41:09,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 09:41:09,558 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 2328 transitions. [2020-12-22 09:41:09,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 09:41:09,559 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:09,559 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:41:09,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:41:09,560 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:09,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:09,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1403516117, now seen corresponding path program 1 times [2020-12-22 09:41:09,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:09,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321582199] [2020-12-22 09:41:09,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:09,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:09,666 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 09:41:09,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321582199] [2020-12-22 09:41:09,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:09,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:41:09,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024857796] [2020-12-22 09:41:09,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:41:09,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:09,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:41:09,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:41:09,673 INFO L87 Difference]: Start difference. First operand 1384 states and 2328 transitions. Second operand 3 states. [2020-12-22 09:41:15,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:15,370 INFO L93 Difference]: Finished difference Result 2888 states and 5201 transitions. [2020-12-22 09:41:15,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:41:15,371 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2020-12-22 09:41:15,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:15,385 INFO L225 Difference]: With dead ends: 2888 [2020-12-22 09:41:15,385 INFO L226 Difference]: Without dead ends: 2135 [2020-12-22 09:41:15,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 09:41:15,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2135 states. [2020-12-22 09:41:15,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2135 to 2135. [2020-12-22 09:41:15,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2135 states. [2020-12-22 09:41:15,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2135 states to 2135 states and 3703 transitions. [2020-12-22 09:41:15,535 INFO L78 Accepts]: Start accepts. Automaton has 2135 states and 3703 transitions. Word has length 48 [2020-12-22 09:41:15,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:15,535 INFO L481 AbstractCegarLoop]: Abstraction has 2135 states and 3703 transitions. [2020-12-22 09:41:15,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:41:15,536 INFO L276 IsEmpty]: Start isEmpty. Operand 2135 states and 3703 transitions. [2020-12-22 09:41:15,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 09:41:15,537 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:15,537 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] [2020-12-22 09:41:15,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:41:15,538 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:15,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:15,538 INFO L82 PathProgramCache]: Analyzing trace with hash -638527781, now seen corresponding path program 1 times [2020-12-22 09:41:15,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:15,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780139045] [2020-12-22 09:41:15,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:15,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:15,611 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 09:41:15,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780139045] [2020-12-22 09:41:15,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:15,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:41:15,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540006851] [2020-12-22 09:41:15,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:41:15,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:15,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:41:15,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:41:15,616 INFO L87 Difference]: Start difference. First operand 2135 states and 3703 transitions. Second operand 5 states. [2020-12-22 09:41:15,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:15,835 INFO L93 Difference]: Finished difference Result 4087 states and 6475 transitions. [2020-12-22 09:41:15,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:41:15,836 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-12-22 09:41:15,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:15,855 INFO L225 Difference]: With dead ends: 4087 [2020-12-22 09:41:15,855 INFO L226 Difference]: Without dead ends: 3481 [2020-12-22 09:41:15,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:41:15,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3481 states. [2020-12-22 09:41:15,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3481 to 2739. [2020-12-22 09:41:15,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2739 states. [2020-12-22 09:41:15,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2739 states to 2739 states and 4555 transitions. [2020-12-22 09:41:15,999 INFO L78 Accepts]: Start accepts. Automaton has 2739 states and 4555 transitions. Word has length 63 [2020-12-22 09:41:15,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:15,999 INFO L481 AbstractCegarLoop]: Abstraction has 2739 states and 4555 transitions. [2020-12-22 09:41:15,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:41:15,999 INFO L276 IsEmpty]: Start isEmpty. Operand 2739 states and 4555 transitions. [2020-12-22 09:41:16,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 09:41:16,001 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:16,001 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] [2020-12-22 09:41:16,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:41:16,001 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:16,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:16,002 INFO L82 PathProgramCache]: Analyzing trace with hash 608979835, now seen corresponding path program 1 times [2020-12-22 09:41:16,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:16,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076968849] [2020-12-22 09:41:16,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:16,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:16,066 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 09:41:16,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076968849] [2020-12-22 09:41:16,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:16,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:41:16,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496936284] [2020-12-22 09:41:16,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:41:16,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:16,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:41:16,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:41:16,068 INFO L87 Difference]: Start difference. First operand 2739 states and 4555 transitions. Second operand 5 states. [2020-12-22 09:41:16,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:16,329 INFO L93 Difference]: Finished difference Result 4691 states and 7327 transitions. [2020-12-22 09:41:16,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:41:16,329 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-12-22 09:41:16,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:16,353 INFO L225 Difference]: With dead ends: 4691 [2020-12-22 09:41:16,354 INFO L226 Difference]: Without dead ends: 4085 [2020-12-22 09:41:16,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:41:16,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4085 states. [2020-12-22 09:41:16,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4085 to 3647. [2020-12-22 09:41:16,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3647 states. [2020-12-22 09:41:16,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3647 states to 3647 states and 5823 transitions. [2020-12-22 09:41:16,586 INFO L78 Accepts]: Start accepts. Automaton has 3647 states and 5823 transitions. Word has length 63 [2020-12-22 09:41:16,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:16,586 INFO L481 AbstractCegarLoop]: Abstraction has 3647 states and 5823 transitions. [2020-12-22 09:41:16,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:41:16,586 INFO L276 IsEmpty]: Start isEmpty. Operand 3647 states and 5823 transitions. [2020-12-22 09:41:16,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 09:41:16,588 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:16,588 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:41:16,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:41:16,589 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:16,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:16,589 INFO L82 PathProgramCache]: Analyzing trace with hash 2078412817, now seen corresponding path program 1 times [2020-12-22 09:41:16,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:16,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261498270] [2020-12-22 09:41:16,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:16,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:16,668 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:41:16,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261498270] [2020-12-22 09:41:16,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:16,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:41:16,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829719633] [2020-12-22 09:41:16,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:41:16,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:16,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:41:16,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:41:16,676 INFO L87 Difference]: Start difference. First operand 3647 states and 5823 transitions. Second operand 5 states. [2020-12-22 09:41:16,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:16,938 INFO L93 Difference]: Finished difference Result 4951 states and 7699 transitions. [2020-12-22 09:41:16,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:41:16,939 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-12-22 09:41:16,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:16,986 INFO L225 Difference]: With dead ends: 4951 [2020-12-22 09:41:16,986 INFO L226 Difference]: Without dead ends: 4517 [2020-12-22 09:41:16,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:41:16,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4517 states. [2020-12-22 09:41:17,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4517 to 4079. [2020-12-22 09:41:17,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4079 states. [2020-12-22 09:41:17,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4079 states to 4079 states and 6439 transitions. [2020-12-22 09:41:17,238 INFO L78 Accepts]: Start accepts. Automaton has 4079 states and 6439 transitions. Word has length 63 [2020-12-22 09:41:17,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:17,238 INFO L481 AbstractCegarLoop]: Abstraction has 4079 states and 6439 transitions. [2020-12-22 09:41:17,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:41:17,238 INFO L276 IsEmpty]: Start isEmpty. Operand 4079 states and 6439 transitions. [2020-12-22 09:41:17,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:41:17,243 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:17,244 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:41:17,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:41:17,245 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:17,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:17,246 INFO L82 PathProgramCache]: Analyzing trace with hash 47222752, now seen corresponding path program 1 times [2020-12-22 09:41:17,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:17,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858006338] [2020-12-22 09:41:17,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:17,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:17,312 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 09:41:17,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858006338] [2020-12-22 09:41:17,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:17,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:41:17,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893108026] [2020-12-22 09:41:17,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:41:17,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:17,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:41:17,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:41:17,315 INFO L87 Difference]: Start difference. First operand 4079 states and 6439 transitions. Second operand 3 states. [2020-12-22 09:41:17,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:17,503 INFO L93 Difference]: Finished difference Result 6631 states and 10041 transitions. [2020-12-22 09:41:17,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:41:17,503 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:41:17,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:17,514 INFO L225 Difference]: With dead ends: 6631 [2020-12-22 09:41:17,515 INFO L226 Difference]: Without dead ends: 4081 [2020-12-22 09:41:17,521 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 09:41:17,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4081 states. [2020-12-22 09:41:17,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4081 to 4079. [2020-12-22 09:41:17,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4079 states. [2020-12-22 09:41:17,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4079 states to 4079 states and 6389 transitions. [2020-12-22 09:41:17,834 INFO L78 Accepts]: Start accepts. Automaton has 4079 states and 6389 transitions. Word has length 64 [2020-12-22 09:41:17,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:17,834 INFO L481 AbstractCegarLoop]: Abstraction has 4079 states and 6389 transitions. [2020-12-22 09:41:17,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:41:17,834 INFO L276 IsEmpty]: Start isEmpty. Operand 4079 states and 6389 transitions. [2020-12-22 09:41:17,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:41:17,836 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:17,836 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:41:17,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:41:17,836 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:17,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:17,837 INFO L82 PathProgramCache]: Analyzing trace with hash -39896042, now seen corresponding path program 1 times [2020-12-22 09:41:17,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:17,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387920722] [2020-12-22 09:41:17,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:17,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:17,889 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:41:17,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387920722] [2020-12-22 09:41:17,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:17,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:41:17,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138766937] [2020-12-22 09:41:17,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:41:17,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:17,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:41:17,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:41:17,892 INFO L87 Difference]: Start difference. First operand 4079 states and 6389 transitions. Second operand 3 states. [2020-12-22 09:41:18,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:18,013 INFO L93 Difference]: Finished difference Result 5357 states and 8166 transitions. [2020-12-22 09:41:18,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:41:18,014 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:41:18,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:18,021 INFO L225 Difference]: With dead ends: 5357 [2020-12-22 09:41:18,021 INFO L226 Difference]: Without dead ends: 2807 [2020-12-22 09:41:18,025 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 09:41:18,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2807 states. [2020-12-22 09:41:18,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2807 to 2805. [2020-12-22 09:41:18,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2805 states. [2020-12-22 09:41:18,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2805 states to 2805 states and 4589 transitions. [2020-12-22 09:41:18,157 INFO L78 Accepts]: Start accepts. Automaton has 2805 states and 4589 transitions. Word has length 64 [2020-12-22 09:41:18,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:18,157 INFO L481 AbstractCegarLoop]: Abstraction has 2805 states and 4589 transitions. [2020-12-22 09:41:18,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:41:18,157 INFO L276 IsEmpty]: Start isEmpty. Operand 2805 states and 4589 transitions. [2020-12-22 09:41:18,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:41:18,158 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:18,159 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] [2020-12-22 09:41:18,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:41:18,159 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:18,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:18,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1159171252, now seen corresponding path program 1 times [2020-12-22 09:41:18,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:18,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935297012] [2020-12-22 09:41:18,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:18,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:18,372 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 09:41:18,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935297012] [2020-12-22 09:41:18,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074670979] [2020-12-22 09:41:18,372 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 09:41:18,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:18,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 09:41:18,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:41:18,793 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:41:18,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:41:18,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2020-12-22 09:41:18,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412378078] [2020-12-22 09:41:18,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 09:41:18,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:18,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 09:41:18,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-12-22 09:41:18,796 INFO L87 Difference]: Start difference. First operand 2805 states and 4589 transitions. Second operand 12 states. [2020-12-22 09:41:21,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:21,536 INFO L93 Difference]: Finished difference Result 9196 states and 13293 transitions. [2020-12-22 09:41:21,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 09:41:21,537 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 64 [2020-12-22 09:41:21,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:21,558 INFO L225 Difference]: With dead ends: 9196 [2020-12-22 09:41:21,558 INFO L226 Difference]: Without dead ends: 8222 [2020-12-22 09:41:21,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=398, Invalid=1494, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 09:41:21,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8222 states. [2020-12-22 09:41:22,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8222 to 5939. [2020-12-22 09:41:22,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5939 states. [2020-12-22 09:41:22,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5939 states to 5939 states and 8776 transitions. [2020-12-22 09:41:22,117 INFO L78 Accepts]: Start accepts. Automaton has 5939 states and 8776 transitions. Word has length 64 [2020-12-22 09:41:22,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:22,117 INFO L481 AbstractCegarLoop]: Abstraction has 5939 states and 8776 transitions. [2020-12-22 09:41:22,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 09:41:22,118 INFO L276 IsEmpty]: Start isEmpty. Operand 5939 states and 8776 transitions. [2020-12-22 09:41:22,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:41:22,119 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:22,119 INFO L422 BasicCegarLoop]: trace histogram [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 09:41:22,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 09:41:22,334 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:22,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:22,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1862030833, now seen corresponding path program 1 times [2020-12-22 09:41:22,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:22,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630274019] [2020-12-22 09:41:22,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:22,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:22,537 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:41:22,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630274019] [2020-12-22 09:41:22,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245883200] [2020-12-22 09:41:22,538 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 09:41:22,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:22,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:41:22,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:41:22,766 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:41:23,050 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:41:23,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:41:23,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:41:23,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373247777] [2020-12-22 09:41:23,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:41:23,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:23,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:41:23,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:41:23,053 INFO L87 Difference]: Start difference. First operand 5939 states and 8776 transitions. Second operand 17 states. [2020-12-22 09:41:27,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:27,635 INFO L93 Difference]: Finished difference Result 28219 states and 38514 transitions. [2020-12-22 09:41:27,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 09:41:27,636 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 65 [2020-12-22 09:41:27,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:27,700 INFO L225 Difference]: With dead ends: 28219 [2020-12-22 09:41:27,701 INFO L226 Difference]: Without dead ends: 23809 [2020-12-22 09:41:27,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=578, Invalid=1678, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 09:41:27,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23809 states. [2020-12-22 09:41:28,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23809 to 11219. [2020-12-22 09:41:28,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11219 states. [2020-12-22 09:41:28,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11219 states to 11219 states and 15684 transitions. [2020-12-22 09:41:28,942 INFO L78 Accepts]: Start accepts. Automaton has 11219 states and 15684 transitions. Word has length 65 [2020-12-22 09:41:28,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:28,943 INFO L481 AbstractCegarLoop]: Abstraction has 11219 states and 15684 transitions. [2020-12-22 09:41:28,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:41:28,943 INFO L276 IsEmpty]: Start isEmpty. Operand 11219 states and 15684 transitions. [2020-12-22 09:41:28,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:41:28,945 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:28,945 INFO L422 BasicCegarLoop]: trace histogram [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 09:41:29,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 09:41:29,162 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:29,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:29,164 INFO L82 PathProgramCache]: Analyzing trace with hash 664153647, now seen corresponding path program 1 times [2020-12-22 09:41:29,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:29,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368168724] [2020-12-22 09:41:29,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:29,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:29,357 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:41:29,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368168724] [2020-12-22 09:41:29,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7147045] [2020-12-22 09:41:29,358 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 09:41:29,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:29,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 09:41:29,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:41:29,631 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:41:29,934 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:41:29,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:41:29,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2020-12-22 09:41:29,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576055346] [2020-12-22 09:41:29,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 09:41:29,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:29,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 09:41:29,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2020-12-22 09:41:29,937 INFO L87 Difference]: Start difference. First operand 11219 states and 15684 transitions. Second operand 18 states. [2020-12-22 09:41:34,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:34,654 INFO L93 Difference]: Finished difference Result 52315 states and 69322 transitions. [2020-12-22 09:41:34,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:41:34,655 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 65 [2020-12-22 09:41:34,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:34,755 INFO L225 Difference]: With dead ends: 52315 [2020-12-22 09:41:34,755 INFO L226 Difference]: Without dead ends: 42625 [2020-12-22 09:41:34,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=362, Invalid=1044, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 09:41:34,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42625 states. [2020-12-22 09:41:37,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42625 to 27973. [2020-12-22 09:41:37,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27973 states. [2020-12-22 09:41:37,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27973 states to 27973 states and 37430 transitions. [2020-12-22 09:41:37,656 INFO L78 Accepts]: Start accepts. Automaton has 27973 states and 37430 transitions. Word has length 65 [2020-12-22 09:41:37,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:37,656 INFO L481 AbstractCegarLoop]: Abstraction has 27973 states and 37430 transitions. [2020-12-22 09:41:37,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 09:41:37,656 INFO L276 IsEmpty]: Start isEmpty. Operand 27973 states and 37430 transitions. [2020-12-22 09:41:37,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:41:37,658 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:37,658 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] [2020-12-22 09:41:37,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 09:41:37,860 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:37,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:37,861 INFO L82 PathProgramCache]: Analyzing trace with hash -386254747, now seen corresponding path program 1 times [2020-12-22 09:41:37,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:37,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317812460] [2020-12-22 09:41:37,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:37,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:37,904 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:41:37,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317812460] [2020-12-22 09:41:37,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:37,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:41:37,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937921686] [2020-12-22 09:41:37,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:41:37,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:37,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:41:37,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:41:37,911 INFO L87 Difference]: Start difference. First operand 27973 states and 37430 transitions. Second operand 3 states. [2020-12-22 09:41:39,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:39,063 INFO L93 Difference]: Finished difference Result 39431 states and 52422 transitions. [2020-12-22 09:41:39,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:41:39,064 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 09:41:39,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:39,093 INFO L225 Difference]: With dead ends: 39431 [2020-12-22 09:41:39,093 INFO L226 Difference]: Without dead ends: 12987 [2020-12-22 09:41:39,128 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 09:41:39,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12987 states. [2020-12-22 09:41:40,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12987 to 12110. [2020-12-22 09:41:40,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12110 states. [2020-12-22 09:41:40,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12110 states to 12110 states and 16454 transitions. [2020-12-22 09:41:40,397 INFO L78 Accepts]: Start accepts. Automaton has 12110 states and 16454 transitions. Word has length 65 [2020-12-22 09:41:40,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:40,397 INFO L481 AbstractCegarLoop]: Abstraction has 12110 states and 16454 transitions. [2020-12-22 09:41:40,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:41:40,397 INFO L276 IsEmpty]: Start isEmpty. Operand 12110 states and 16454 transitions. [2020-12-22 09:41:40,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:41:40,400 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:40,400 INFO L422 BasicCegarLoop]: trace histogram [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 09:41:40,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:41:40,400 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:40,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:40,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1828535725, now seen corresponding path program 1 times [2020-12-22 09:41:40,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:40,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297588236] [2020-12-22 09:41:40,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:40,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:40,459 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 09:41:40,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297588236] [2020-12-22 09:41:40,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:40,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:41:40,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39413137] [2020-12-22 09:41:40,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:41:40,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:40,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:41:40,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:41:40,462 INFO L87 Difference]: Start difference. First operand 12110 states and 16454 transitions. Second operand 6 states. [2020-12-22 09:41:41,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:41,189 INFO L93 Difference]: Finished difference Result 20901 states and 27827 transitions. [2020-12-22 09:41:41,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:41:41,189 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-12-22 09:41:41,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:41,208 INFO L225 Difference]: With dead ends: 20901 [2020-12-22 09:41:41,208 INFO L226 Difference]: Without dead ends: 10393 [2020-12-22 09:41:41,221 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 09:41:41,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10393 states. [2020-12-22 09:41:42,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10393 to 10393. [2020-12-22 09:41:42,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10393 states. [2020-12-22 09:41:42,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10393 states to 10393 states and 14017 transitions. [2020-12-22 09:41:42,035 INFO L78 Accepts]: Start accepts. Automaton has 10393 states and 14017 transitions. Word has length 65 [2020-12-22 09:41:42,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:42,036 INFO L481 AbstractCegarLoop]: Abstraction has 10393 states and 14017 transitions. [2020-12-22 09:41:42,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:41:42,036 INFO L276 IsEmpty]: Start isEmpty. Operand 10393 states and 14017 transitions. [2020-12-22 09:41:42,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:41:42,038 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:42,038 INFO L422 BasicCegarLoop]: trace histogram [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 09:41:42,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 09:41:42,038 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:42,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:42,039 INFO L82 PathProgramCache]: Analyzing trace with hash 269786861, now seen corresponding path program 1 times [2020-12-22 09:41:42,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:42,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526428316] [2020-12-22 09:41:42,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:42,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:42,098 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 09:41:42,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526428316] [2020-12-22 09:41:42,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:42,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:41:42,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961465983] [2020-12-22 09:41:42,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:41:42,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:42,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:41:42,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:41:42,100 INFO L87 Difference]: Start difference. First operand 10393 states and 14017 transitions. Second operand 6 states. [2020-12-22 09:41:42,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:42,962 INFO L93 Difference]: Finished difference Result 16950 states and 22333 transitions. [2020-12-22 09:41:42,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:41:42,963 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-12-22 09:41:42,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:42,976 INFO L225 Difference]: With dead ends: 16950 [2020-12-22 09:41:42,977 INFO L226 Difference]: Without dead ends: 8197 [2020-12-22 09:41:42,985 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 09:41:42,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8197 states. [2020-12-22 09:41:44,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8197 to 8197. [2020-12-22 09:41:44,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8197 states. [2020-12-22 09:41:44,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8197 states to 8197 states and 11105 transitions. [2020-12-22 09:41:44,044 INFO L78 Accepts]: Start accepts. Automaton has 8197 states and 11105 transitions. Word has length 65 [2020-12-22 09:41:44,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:44,044 INFO L481 AbstractCegarLoop]: Abstraction has 8197 states and 11105 transitions. [2020-12-22 09:41:44,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:41:44,045 INFO L276 IsEmpty]: Start isEmpty. Operand 8197 states and 11105 transitions. [2020-12-22 09:41:44,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:41:44,046 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:44,046 INFO L422 BasicCegarLoop]: trace histogram [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 09:41:44,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 09:41:44,046 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:44,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:44,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1061129165, now seen corresponding path program 1 times [2020-12-22 09:41:44,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:44,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672534400] [2020-12-22 09:41:44,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:44,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:44,102 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 09:41:44,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672534400] [2020-12-22 09:41:44,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:44,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:41:44,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975806496] [2020-12-22 09:41:44,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:41:44,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:44,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:41:44,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:41:44,107 INFO L87 Difference]: Start difference. First operand 8197 states and 11105 transitions. Second operand 6 states. [2020-12-22 09:41:44,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:44,652 INFO L93 Difference]: Finished difference Result 13363 states and 17578 transitions. [2020-12-22 09:41:44,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:41:44,652 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-12-22 09:41:44,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:44,661 INFO L225 Difference]: With dead ends: 13363 [2020-12-22 09:41:44,661 INFO L226 Difference]: Without dead ends: 6730 [2020-12-22 09:41:44,667 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 09:41:44,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6730 states. [2020-12-22 09:41:45,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6730 to 6730. [2020-12-22 09:41:45,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6730 states. [2020-12-22 09:41:45,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6730 states to 6730 states and 9236 transitions. [2020-12-22 09:41:45,454 INFO L78 Accepts]: Start accepts. Automaton has 6730 states and 9236 transitions. Word has length 65 [2020-12-22 09:41:45,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:45,454 INFO L481 AbstractCegarLoop]: Abstraction has 6730 states and 9236 transitions. [2020-12-22 09:41:45,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:41:45,455 INFO L276 IsEmpty]: Start isEmpty. Operand 6730 states and 9236 transitions. [2020-12-22 09:41:45,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:41:45,456 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:45,456 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:41:45,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 09:41:45,456 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:45,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:45,457 INFO L82 PathProgramCache]: Analyzing trace with hash 695787833, now seen corresponding path program 1 times [2020-12-22 09:41:45,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:45,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711401271] [2020-12-22 09:41:45,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:45,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:46,341 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:41:46,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711401271] [2020-12-22 09:41:46,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253478143] [2020-12-22 09:41:46,342 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 09:41:46,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:46,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 09:41:46,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:41:47,219 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:41:47,683 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:41:47,699 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:41:47,701 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:41:47,705 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:41:48,361 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:41:48,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:41:48,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18] total 39 [2020-12-22 09:41:48,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145376000] [2020-12-22 09:41:48,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 09:41:48,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:48,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 09:41:48,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 09:41:48,364 INFO L87 Difference]: Start difference. First operand 6730 states and 9236 transitions. Second operand 39 states. [2020-12-22 09:41:48,688 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2020-12-22 09:41:49,906 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2020-12-22 09:41:50,169 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2020-12-22 09:41:50,420 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-12-22 09:41:50,740 WARN L197 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2020-12-22 09:41:51,049 WARN L197 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2020-12-22 09:41:51,313 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2020-12-22 09:41:51,573 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2020-12-22 09:41:51,806 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2020-12-22 09:41:52,084 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-12-22 09:41:56,000 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2020-12-22 09:41:56,979 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2020-12-22 09:41:57,276 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-12-22 09:41:57,494 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2020-12-22 09:41:57,676 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2020-12-22 09:41:57,845 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2020-12-22 09:41:58,094 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2020-12-22 09:41:59,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:59,311 INFO L93 Difference]: Finished difference Result 10323 states and 13747 transitions. [2020-12-22 09:41:59,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-12-22 09:41:59,312 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 66 [2020-12-22 09:41:59,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:59,322 INFO L225 Difference]: With dead ends: 10323 [2020-12-22 09:41:59,322 INFO L226 Difference]: Without dead ends: 8453 [2020-12-22 09:41:59,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1961 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=1370, Invalid=7560, Unknown=0, NotChecked=0, Total=8930 [2020-12-22 09:41:59,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8453 states. [2020-12-22 09:41:59,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8453 to 6619. [2020-12-22 09:41:59,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6619 states. [2020-12-22 09:41:59,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6619 states to 6619 states and 9134 transitions. [2020-12-22 09:41:59,944 INFO L78 Accepts]: Start accepts. Automaton has 6619 states and 9134 transitions. Word has length 66 [2020-12-22 09:41:59,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:59,945 INFO L481 AbstractCegarLoop]: Abstraction has 6619 states and 9134 transitions. [2020-12-22 09:41:59,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 09:41:59,945 INFO L276 IsEmpty]: Start isEmpty. Operand 6619 states and 9134 transitions. [2020-12-22 09:41:59,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:41:59,946 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:59,946 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:42:00,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:42:00,148 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:00,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:00,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1166524545, now seen corresponding path program 1 times [2020-12-22 09:42:00,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:00,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144319622] [2020-12-22 09:42:00,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:00,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:01,202 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:42:01,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144319622] [2020-12-22 09:42:01,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359696465] [2020-12-22 09:42:01,203 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 09:42:01,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:01,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-22 09:42:01,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:42:03,226 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 2, 1] term [2020-12-22 09:42:03,226 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:42:03,229 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 09:42:03,827 WARN L197 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 46