/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/combinations/pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:49:50,680 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:49:50,682 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:49:50,731 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:49:50,732 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:49:50,736 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:49:50,739 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:49:50,747 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:49:50,751 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:49:50,756 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:49:50,758 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:49:50,759 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:49:50,759 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:49:50,762 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:49:50,764 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:49:50,766 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:49:50,767 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:49:50,770 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:49:50,787 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:49:50,790 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:49:50,792 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:49:50,794 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:49:50,795 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:49:50,796 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:49:50,799 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:49:50,802 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:49:50,803 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:49:50,804 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:49:50,805 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:49:50,806 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:49:50,806 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:49:50,807 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:49:50,808 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:49:50,808 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:49:50,809 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:49:50,810 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:49:50,811 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:49:50,838 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:49:50,838 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:49:50,840 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:49:50,840 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:49:50,840 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:49:50,840 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:49:50,841 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:49:50,841 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:49:50,841 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:49:50,841 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:49:50,841 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:49:50,842 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:49:50,842 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:49:50,842 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:49:50,842 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:49:50,842 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:49:50,843 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:49:50,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:49:50,843 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:49:50,843 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:49:50,844 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:49:50,844 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:49:50,844 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:49:50,844 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:49:50,844 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:49:50,845 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:49:51,228 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:49:51,266 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:49:51,269 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:49:51,271 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:49:51,272 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:49:51,273 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c [2020-12-22 09:49:51,367 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93c3f27e2/3ac64142b6e04ab286498eb5331f692b/FLAG3aa9992f4 [2020-12-22 09:49:52,506 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:49:52,506 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c [2020-12-22 09:49:52,553 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93c3f27e2/3ac64142b6e04ab286498eb5331f692b/FLAG3aa9992f4 [2020-12-22 09:49:52,939 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93c3f27e2/3ac64142b6e04ab286498eb5331f692b [2020-12-22 09:49:52,943 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:49:52,945 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:49:52,950 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:49:52,950 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:49:52,954 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:49:52,954 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:49:52" (1/1) ... [2020-12-22 09:49:52,956 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c1a7d35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:49:52, skipping insertion in model container [2020-12-22 09:49:52,957 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:49:52" (1/1) ... [2020-12-22 09:49:52,965 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:49:53,185 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:49:53,545 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c[8858,8871] [2020-12-22 09:49:53,618 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c[16363,16376] [2020-12-22 09:49:54,556 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:49:54,570 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:49:54,696 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c[8858,8871] [2020-12-22 09:49:54,718 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c[16363,16376] [2020-12-22 09:49:55,360 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:49:55,402 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:49:55,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:49:55 WrapperNode [2020-12-22 09:49:55,403 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:49:55,404 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:49:55,404 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:49:55,405 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:49:55,414 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:49:55" (1/1) ... [2020-12-22 09:49:55,485 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:49:55" (1/1) ... [2020-12-22 09:49:55,905 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:49:55,908 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:49:55,908 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:49:55,908 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:49:55,919 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:49:55" (1/1) ... [2020-12-22 09:49:55,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:49:55" (1/1) ... [2020-12-22 09:49:55,990 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:49:55" (1/1) ... [2020-12-22 09:49:55,990 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:49:55" (1/1) ... [2020-12-22 09:49:56,248 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:49:55" (1/1) ... [2020-12-22 09:49:56,293 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:49:55" (1/1) ... [2020-12-22 09:49:56,335 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:49:55" (1/1) ... [2020-12-22 09:49:56,475 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:49:56,476 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:49:56,477 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:49:56,477 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:49:56,478 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:49:55" (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 09:49:56,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:49:56,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:49:56,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:49:56,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:50:01,618 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:50:01,619 INFO L299 CfgBuilder]: Removed 34 assume(true) statements. [2020-12-22 09:50:01,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:50:01 BoogieIcfgContainer [2020-12-22 09:50:01,625 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:50:01,627 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:50:01,627 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:50:01,634 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:50:01,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:49:52" (1/3) ... [2020-12-22 09:50:01,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36d714bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:50:01, skipping insertion in model container [2020-12-22 09:50:01,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:49:55" (2/3) ... [2020-12-22 09:50:01,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36d714bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:50:01, skipping insertion in model container [2020-12-22 09:50:01,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:50:01" (3/3) ... [2020-12-22 09:50:01,639 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c [2020-12-22 09:50:01,646 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:50:01,653 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:50:01,673 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:50:01,709 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:50:01,710 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:50:01,710 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:50:01,710 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:50:01,710 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:50:01,711 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:50:01,711 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:50:01,711 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:50:01,748 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states. [2020-12-22 09:50:01,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 09:50:01,759 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:01,760 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:50:01,761 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:01,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:01,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1675876582, now seen corresponding path program 1 times [2020-12-22 09:50:01,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:01,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087780519] [2020-12-22 09:50:01,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:01,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:02,037 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 09:50:02,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087780519] [2020-12-22 09:50:02,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:50:02,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:50:02,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729523089] [2020-12-22 09:50:02,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 09:50:02,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:02,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 09:50:02,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:50:02,082 INFO L87 Difference]: Start difference. First operand 892 states. Second operand 2 states. [2020-12-22 09:50:02,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:02,193 INFO L93 Difference]: Finished difference Result 1753 states and 3328 transitions. [2020-12-22 09:50:02,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 09:50:02,195 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 30 [2020-12-22 09:50:02,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:50:02,247 INFO L225 Difference]: With dead ends: 1753 [2020-12-22 09:50:02,247 INFO L226 Difference]: Without dead ends: 826 [2020-12-22 09:50:02,259 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 09:50:02,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2020-12-22 09:50:02,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 826. [2020-12-22 09:50:02,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 826 states. [2020-12-22 09:50:02,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1559 transitions. [2020-12-22 09:50:02,362 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1559 transitions. Word has length 30 [2020-12-22 09:50:02,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:02,363 INFO L481 AbstractCegarLoop]: Abstraction has 826 states and 1559 transitions. [2020-12-22 09:50:02,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 09:50:02,363 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1559 transitions. [2020-12-22 09:50:02,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 09:50:02,365 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:02,365 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:50:02,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:50:02,366 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:02,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:02,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1541863076, now seen corresponding path program 1 times [2020-12-22 09:50:02,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:02,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110170349] [2020-12-22 09:50:02,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:02,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:02,563 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 09:50:02,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110170349] [2020-12-22 09:50:02,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:50:02,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:50:02,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186220550] [2020-12-22 09:50:02,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:50:02,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:02,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:50:02,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:50:02,568 INFO L87 Difference]: Start difference. First operand 826 states and 1559 transitions. Second operand 5 states. [2020-12-22 09:50:02,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:02,684 INFO L93 Difference]: Finished difference Result 873 states and 1631 transitions. [2020-12-22 09:50:02,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:50:02,684 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-12-22 09:50:02,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:50:02,690 INFO L225 Difference]: With dead ends: 873 [2020-12-22 09:50:02,690 INFO L226 Difference]: Without dead ends: 826 [2020-12-22 09:50:02,691 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 09:50:02,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2020-12-22 09:50:02,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 826. [2020-12-22 09:50:02,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 826 states. [2020-12-22 09:50:02,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1536 transitions. [2020-12-22 09:50:02,719 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1536 transitions. Word has length 30 [2020-12-22 09:50:02,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:02,719 INFO L481 AbstractCegarLoop]: Abstraction has 826 states and 1536 transitions. [2020-12-22 09:50:02,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:50:02,719 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1536 transitions. [2020-12-22 09:50:02,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:50:02,722 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:02,722 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:50:02,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:50:02,722 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:02,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:02,723 INFO L82 PathProgramCache]: Analyzing trace with hash 159296799, now seen corresponding path program 1 times [2020-12-22 09:50:02,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:02,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192985100] [2020-12-22 09:50:02,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:02,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:02,874 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 09:50:02,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192985100] [2020-12-22 09:50:02,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:50:02,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:50:02,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371123818] [2020-12-22 09:50:02,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:50:02,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:02,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:50:02,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:50:02,878 INFO L87 Difference]: Start difference. First operand 826 states and 1536 transitions. Second operand 3 states. [2020-12-22 09:50:02,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:02,917 INFO L93 Difference]: Finished difference Result 906 states and 1662 transitions. [2020-12-22 09:50:02,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:50:02,918 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:50:02,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:50:02,923 INFO L225 Difference]: With dead ends: 906 [2020-12-22 09:50:02,924 INFO L226 Difference]: Without dead ends: 863 [2020-12-22 09:50:02,925 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 09:50:02,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2020-12-22 09:50:02,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 861. [2020-12-22 09:50:02,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 861 states. [2020-12-22 09:50:02,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 1592 transitions. [2020-12-22 09:50:02,949 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 1592 transitions. Word has length 52 [2020-12-22 09:50:02,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:02,949 INFO L481 AbstractCegarLoop]: Abstraction has 861 states and 1592 transitions. [2020-12-22 09:50:02,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:50:02,950 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 1592 transitions. [2020-12-22 09:50:02,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:50:02,951 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:02,952 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:50:02,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:50:02,952 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:02,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:02,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1780734059, now seen corresponding path program 1 times [2020-12-22 09:50:02,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:02,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755702178] [2020-12-22 09:50:02,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:02,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:03,026 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 09:50:03,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755702178] [2020-12-22 09:50:03,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:50:03,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:50:03,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046062088] [2020-12-22 09:50:03,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:50:03,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:03,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:50:03,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:50:03,030 INFO L87 Difference]: Start difference. First operand 861 states and 1592 transitions. Second operand 3 states. [2020-12-22 09:50:03,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:03,068 INFO L93 Difference]: Finished difference Result 1005 states and 1820 transitions. [2020-12-22 09:50:03,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:50:03,068 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:50:03,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:50:03,074 INFO L225 Difference]: With dead ends: 1005 [2020-12-22 09:50:03,075 INFO L226 Difference]: Without dead ends: 927 [2020-12-22 09:50:03,076 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 09:50:03,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2020-12-22 09:50:03,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 925. [2020-12-22 09:50:03,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 925 states. [2020-12-22 09:50:03,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 1693 transitions. [2020-12-22 09:50:03,104 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 1693 transitions. Word has length 52 [2020-12-22 09:50:03,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:03,105 INFO L481 AbstractCegarLoop]: Abstraction has 925 states and 1693 transitions. [2020-12-22 09:50:03,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:50:03,105 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 1693 transitions. [2020-12-22 09:50:03,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:50:03,107 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:03,107 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:50:03,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:50:03,108 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:03,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:03,108 INFO L82 PathProgramCache]: Analyzing trace with hash 919948555, now seen corresponding path program 1 times [2020-12-22 09:50:03,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:03,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108322759] [2020-12-22 09:50:03,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:03,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:03,194 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 09:50:03,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108322759] [2020-12-22 09:50:03,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:50:03,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:50:03,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966973005] [2020-12-22 09:50:03,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:50:03,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:03,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:50:03,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:50:03,198 INFO L87 Difference]: Start difference. First operand 925 states and 1693 transitions. Second operand 3 states. [2020-12-22 09:50:03,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:03,252 INFO L93 Difference]: Finished difference Result 1185 states and 2103 transitions. [2020-12-22 09:50:03,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:50:03,254 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:50:03,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:50:03,263 INFO L225 Difference]: With dead ends: 1185 [2020-12-22 09:50:03,263 INFO L226 Difference]: Without dead ends: 1043 [2020-12-22 09:50:03,264 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 09:50:03,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2020-12-22 09:50:03,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 1041. [2020-12-22 09:50:03,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1041 states. [2020-12-22 09:50:03,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1041 states to 1041 states and 1873 transitions. [2020-12-22 09:50:03,306 INFO L78 Accepts]: Start accepts. Automaton has 1041 states and 1873 transitions. Word has length 52 [2020-12-22 09:50:03,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:03,307 INFO L481 AbstractCegarLoop]: Abstraction has 1041 states and 1873 transitions. [2020-12-22 09:50:03,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:50:03,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1041 states and 1873 transitions. [2020-12-22 09:50:03,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:50:03,309 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:03,309 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:50:03,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:50:03,310 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:03,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:03,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1515907135, now seen corresponding path program 1 times [2020-12-22 09:50:03,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:03,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218886496] [2020-12-22 09:50:03,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:03,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:03,448 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 09:50:03,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218886496] [2020-12-22 09:50:03,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:50:03,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:50:03,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686658962] [2020-12-22 09:50:03,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:50:03,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:03,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:50:03,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:50:03,454 INFO L87 Difference]: Start difference. First operand 1041 states and 1873 transitions. Second operand 3 states. [2020-12-22 09:50:03,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:03,593 INFO L93 Difference]: Finished difference Result 1509 states and 2603 transitions. [2020-12-22 09:50:03,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:50:03,594 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:50:03,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:50:03,603 INFO L225 Difference]: With dead ends: 1509 [2020-12-22 09:50:03,603 INFO L226 Difference]: Without dead ends: 1251 [2020-12-22 09:50:03,605 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 09:50:03,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2020-12-22 09:50:03,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1249. [2020-12-22 09:50:03,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1249 states. [2020-12-22 09:50:03,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 2189 transitions. [2020-12-22 09:50:03,658 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 2189 transitions. Word has length 52 [2020-12-22 09:50:03,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:03,661 INFO L481 AbstractCegarLoop]: Abstraction has 1249 states and 2189 transitions. [2020-12-22 09:50:03,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:50:03,662 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 2189 transitions. [2020-12-22 09:50:03,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:50:03,662 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:03,663 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:50:03,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:50:03,665 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:03,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:03,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1924545907, now seen corresponding path program 1 times [2020-12-22 09:50:03,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:03,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127748740] [2020-12-22 09:50:03,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:03,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:03,802 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 09:50:03,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127748740] [2020-12-22 09:50:03,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:50:03,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:50:03,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076875430] [2020-12-22 09:50:03,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:50:03,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:03,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:50:03,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:50:03,805 INFO L87 Difference]: Start difference. First operand 1249 states and 2189 transitions. Second operand 6 states. [2020-12-22 09:50:04,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:04,149 INFO L93 Difference]: Finished difference Result 4977 states and 7957 transitions. [2020-12-22 09:50:04,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 09:50:04,149 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-12-22 09:50:04,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:50:04,175 INFO L225 Difference]: With dead ends: 4977 [2020-12-22 09:50:04,175 INFO L226 Difference]: Without dead ends: 4511 [2020-12-22 09:50:04,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:50:04,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4511 states. [2020-12-22 09:50:04,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4511 to 1713. [2020-12-22 09:50:04,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1713 states. [2020-12-22 09:50:04,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1713 states to 1713 states and 2877 transitions. [2020-12-22 09:50:04,307 INFO L78 Accepts]: Start accepts. Automaton has 1713 states and 2877 transitions. Word has length 52 [2020-12-22 09:50:04,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:04,307 INFO L481 AbstractCegarLoop]: Abstraction has 1713 states and 2877 transitions. [2020-12-22 09:50:04,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:50:04,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1713 states and 2877 transitions. [2020-12-22 09:50:04,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:50:04,310 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:04,310 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:50:04,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:50:04,310 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:04,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:04,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1236981091, now seen corresponding path program 1 times [2020-12-22 09:50:04,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:04,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798875279] [2020-12-22 09:50:04,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:04,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:04,398 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 09:50:04,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798875279] [2020-12-22 09:50:04,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:50:04,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:50:04,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289897265] [2020-12-22 09:50:04,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:50:04,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:04,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:50:04,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:50:04,404 INFO L87 Difference]: Start difference. First operand 1713 states and 2877 transitions. Second operand 3 states. [2020-12-22 09:50:04,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:04,508 INFO L93 Difference]: Finished difference Result 3071 states and 4929 transitions. [2020-12-22 09:50:04,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:50:04,509 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:50:04,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:50:04,522 INFO L225 Difference]: With dead ends: 3071 [2020-12-22 09:50:04,522 INFO L226 Difference]: Without dead ends: 2141 [2020-12-22 09:50:04,525 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 09:50:04,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2141 states. [2020-12-22 09:50:04,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2141 to 2139. [2020-12-22 09:50:04,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2139 states. [2020-12-22 09:50:04,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2139 states to 2139 states and 3495 transitions. [2020-12-22 09:50:04,628 INFO L78 Accepts]: Start accepts. Automaton has 2139 states and 3495 transitions. Word has length 54 [2020-12-22 09:50:04,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:04,630 INFO L481 AbstractCegarLoop]: Abstraction has 2139 states and 3495 transitions. [2020-12-22 09:50:04,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:50:04,630 INFO L276 IsEmpty]: Start isEmpty. Operand 2139 states and 3495 transitions. [2020-12-22 09:50:04,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:50:04,631 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:04,631 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:50:04,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:50:04,631 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:04,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:04,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1303474603, now seen corresponding path program 1 times [2020-12-22 09:50:04,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:04,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734288122] [2020-12-22 09:50:04,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:04,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:04,828 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 09:50:04,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734288122] [2020-12-22 09:50:04,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:50:04,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:50:04,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308974659] [2020-12-22 09:50:04,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:50:04,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:04,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:50:04,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:50:04,831 INFO L87 Difference]: Start difference. First operand 2139 states and 3495 transitions. Second operand 6 states. [2020-12-22 09:50:05,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:05,051 INFO L93 Difference]: Finished difference Result 3495 states and 5521 transitions. [2020-12-22 09:50:05,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:50:05,052 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-12-22 09:50:05,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:50:05,064 INFO L225 Difference]: With dead ends: 3495 [2020-12-22 09:50:05,064 INFO L226 Difference]: Without dead ends: 2141 [2020-12-22 09:50:05,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:50:05,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2141 states. [2020-12-22 09:50:05,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2141 to 2139. [2020-12-22 09:50:05,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2139 states. [2020-12-22 09:50:05,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2139 states to 2139 states and 3471 transitions. [2020-12-22 09:50:05,181 INFO L78 Accepts]: Start accepts. Automaton has 2139 states and 3471 transitions. Word has length 54 [2020-12-22 09:50:05,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:05,182 INFO L481 AbstractCegarLoop]: Abstraction has 2139 states and 3471 transitions. [2020-12-22 09:50:05,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:50:05,182 INFO L276 IsEmpty]: Start isEmpty. Operand 2139 states and 3471 transitions. [2020-12-22 09:50:05,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:50:05,183 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:05,183 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:50:05,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:50:05,183 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:05,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:05,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1338283904, now seen corresponding path program 1 times [2020-12-22 09:50:05,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:05,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636656914] [2020-12-22 09:50:05,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:05,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:05,300 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 09:50:05,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636656914] [2020-12-22 09:50:05,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:50:05,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:50:05,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744486021] [2020-12-22 09:50:05,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:50:05,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:05,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:50:05,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:50:05,303 INFO L87 Difference]: Start difference. First operand 2139 states and 3471 transitions. Second operand 6 states. [2020-12-22 09:50:05,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:05,594 INFO L93 Difference]: Finished difference Result 3493 states and 5472 transitions. [2020-12-22 09:50:05,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:50:05,595 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-12-22 09:50:05,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:50:05,608 INFO L225 Difference]: With dead ends: 3493 [2020-12-22 09:50:05,608 INFO L226 Difference]: Without dead ends: 2139 [2020-12-22 09:50:05,611 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 09:50:05,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2139 states. [2020-12-22 09:50:05,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2139 to 2139. [2020-12-22 09:50:05,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2139 states. [2020-12-22 09:50:05,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2139 states to 2139 states and 3447 transitions. [2020-12-22 09:50:05,755 INFO L78 Accepts]: Start accepts. Automaton has 2139 states and 3447 transitions. Word has length 55 [2020-12-22 09:50:05,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:05,755 INFO L481 AbstractCegarLoop]: Abstraction has 2139 states and 3447 transitions. [2020-12-22 09:50:05,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:50:05,756 INFO L276 IsEmpty]: Start isEmpty. Operand 2139 states and 3447 transitions. [2020-12-22 09:50:05,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:50:05,757 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:05,757 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:50:05,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:50:05,758 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:05,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:05,758 INFO L82 PathProgramCache]: Analyzing trace with hash 637219326, now seen corresponding path program 1 times [2020-12-22 09:50:05,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:05,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858435100] [2020-12-22 09:50:05,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:05,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:05,835 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 09:50:05,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858435100] [2020-12-22 09:50:05,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:50:05,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:50:05,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521311048] [2020-12-22 09:50:05,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:50:05,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:05,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:50:05,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:50:05,838 INFO L87 Difference]: Start difference. First operand 2139 states and 3447 transitions. Second operand 6 states. [2020-12-22 09:50:06,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:06,081 INFO L93 Difference]: Finished difference Result 3493 states and 5424 transitions. [2020-12-22 09:50:06,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:50:06,082 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-12-22 09:50:06,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:50:06,095 INFO L225 Difference]: With dead ends: 3493 [2020-12-22 09:50:06,095 INFO L226 Difference]: Without dead ends: 2139 [2020-12-22 09:50:06,099 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 09:50:06,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2139 states. [2020-12-22 09:50:06,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2139 to 2139. [2020-12-22 09:50:06,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2139 states. [2020-12-22 09:50:06,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2139 states to 2139 states and 3423 transitions. [2020-12-22 09:50:06,239 INFO L78 Accepts]: Start accepts. Automaton has 2139 states and 3423 transitions. Word has length 55 [2020-12-22 09:50:06,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:06,240 INFO L481 AbstractCegarLoop]: Abstraction has 2139 states and 3423 transitions. [2020-12-22 09:50:06,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:50:06,240 INFO L276 IsEmpty]: Start isEmpty. Operand 2139 states and 3423 transitions. [2020-12-22 09:50:06,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:50:06,241 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:06,241 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:50:06,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:50:06,242 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:06,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:06,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1917083004, now seen corresponding path program 1 times [2020-12-22 09:50:06,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:06,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283384864] [2020-12-22 09:50:06,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:06,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:06,326 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 09:50:06,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283384864] [2020-12-22 09:50:06,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:50:06,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:50:06,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894611444] [2020-12-22 09:50:06,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:50:06,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:06,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:50:06,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:50:06,329 INFO L87 Difference]: Start difference. First operand 2139 states and 3423 transitions. Second operand 5 states. [2020-12-22 09:50:06,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:06,623 INFO L93 Difference]: Finished difference Result 3338 states and 5089 transitions. [2020-12-22 09:50:06,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:50:06,623 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2020-12-22 09:50:06,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:50:06,644 INFO L225 Difference]: With dead ends: 3338 [2020-12-22 09:50:06,645 INFO L226 Difference]: Without dead ends: 3336 [2020-12-22 09:50:06,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:50:06,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3336 states. [2020-12-22 09:50:06,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3336 to 2235. [2020-12-22 09:50:06,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2235 states. [2020-12-22 09:50:06,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2235 states to 2235 states and 3511 transitions. [2020-12-22 09:50:06,848 INFO L78 Accepts]: Start accepts. Automaton has 2235 states and 3511 transitions. Word has length 55 [2020-12-22 09:50:06,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:06,849 INFO L481 AbstractCegarLoop]: Abstraction has 2235 states and 3511 transitions. [2020-12-22 09:50:06,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:50:06,849 INFO L276 IsEmpty]: Start isEmpty. Operand 2235 states and 3511 transitions. [2020-12-22 09:50:06,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:50:06,850 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:06,850 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:50:06,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:50:06,851 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:06,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:06,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1203493419, now seen corresponding path program 1 times [2020-12-22 09:50:06,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:06,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061930997] [2020-12-22 09:50:06,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:06,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:06,978 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 09:50:06,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061930997] [2020-12-22 09:50:06,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:50:06,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:50:06,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842405293] [2020-12-22 09:50:06,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:50:06,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:06,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:50:06,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:50:06,981 INFO L87 Difference]: Start difference. First operand 2235 states and 3511 transitions. Second operand 4 states. [2020-12-22 09:50:17,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:17,326 INFO L93 Difference]: Finished difference Result 4490 states and 7820 transitions. [2020-12-22 09:50:17,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:50:17,326 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-12-22 09:50:17,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:50:17,355 INFO L225 Difference]: With dead ends: 4490 [2020-12-22 09:50:17,356 INFO L226 Difference]: Without dead ends: 3737 [2020-12-22 09:50:17,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:50:17,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3737 states. [2020-12-22 09:50:17,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3737 to 3737. [2020-12-22 09:50:17,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3737 states. [2020-12-22 09:50:17,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3737 states to 3737 states and 5625 transitions. [2020-12-22 09:50:17,569 INFO L78 Accepts]: Start accepts. Automaton has 3737 states and 5625 transitions. Word has length 67 [2020-12-22 09:50:17,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:17,569 INFO L481 AbstractCegarLoop]: Abstraction has 3737 states and 5625 transitions. [2020-12-22 09:50:17,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:50:17,570 INFO L276 IsEmpty]: Start isEmpty. Operand 3737 states and 5625 transitions. [2020-12-22 09:50:17,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 09:50:17,572 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:17,573 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:50:17,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:50:17,573 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:17,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:17,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1830558034, now seen corresponding path program 1 times [2020-12-22 09:50:17,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:17,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358193176] [2020-12-22 09:50:17,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:17,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:17,687 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 09:50:17,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358193176] [2020-12-22 09:50:17,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:50:17,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:50:17,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913611984] [2020-12-22 09:50:17,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:50:17,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:17,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:50:17,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:50:17,690 INFO L87 Difference]: Start difference. First operand 3737 states and 5625 transitions. Second operand 6 states. [2020-12-22 09:50:18,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:18,399 INFO L93 Difference]: Finished difference Result 9843 states and 14194 transitions. [2020-12-22 09:50:18,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:50:18,400 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 09:50:18,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:50:18,443 INFO L225 Difference]: With dead ends: 9843 [2020-12-22 09:50:18,443 INFO L226 Difference]: Without dead ends: 8393 [2020-12-22 09:50:18,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:50:18,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8393 states. [2020-12-22 09:50:18,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8393 to 5185. [2020-12-22 09:50:18,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5185 states. [2020-12-22 09:50:18,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5185 states to 5185 states and 7641 transitions. [2020-12-22 09:50:18,843 INFO L78 Accepts]: Start accepts. Automaton has 5185 states and 7641 transitions. Word has length 78 [2020-12-22 09:50:18,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:18,844 INFO L481 AbstractCegarLoop]: Abstraction has 5185 states and 7641 transitions. [2020-12-22 09:50:18,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:50:18,844 INFO L276 IsEmpty]: Start isEmpty. Operand 5185 states and 7641 transitions. [2020-12-22 09:50:18,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 09:50:18,847 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:18,848 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:50:18,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:50:18,849 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:18,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:18,849 INFO L82 PathProgramCache]: Analyzing trace with hash 61775218, now seen corresponding path program 1 times [2020-12-22 09:50:18,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:18,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343913375] [2020-12-22 09:50:18,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:18,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:18,983 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 09:50:18,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343913375] [2020-12-22 09:50:18,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:50:18,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:50:18,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404767075] [2020-12-22 09:50:18,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:50:18,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:18,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:50:18,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:50:18,988 INFO L87 Difference]: Start difference. First operand 5185 states and 7641 transitions. Second operand 6 states. [2020-12-22 09:50:19,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:19,823 INFO L93 Difference]: Finished difference Result 11291 states and 16210 transitions. [2020-12-22 09:50:19,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:50:19,823 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 09:50:19,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:50:19,857 INFO L225 Difference]: With dead ends: 11291 [2020-12-22 09:50:19,858 INFO L226 Difference]: Without dead ends: 9841 [2020-12-22 09:50:19,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:50:19,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9841 states. [2020-12-22 09:50:20,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9841 to 7361. [2020-12-22 09:50:20,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7361 states. [2020-12-22 09:50:20,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7361 states to 7361 states and 10645 transitions. [2020-12-22 09:50:20,594 INFO L78 Accepts]: Start accepts. Automaton has 7361 states and 10645 transitions. Word has length 78 [2020-12-22 09:50:20,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:20,595 INFO L481 AbstractCegarLoop]: Abstraction has 7361 states and 10645 transitions. [2020-12-22 09:50:20,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:50:20,595 INFO L276 IsEmpty]: Start isEmpty. Operand 7361 states and 10645 transitions. [2020-12-22 09:50:20,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 09:50:20,598 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:20,599 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:50:20,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:50:20,599 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:20,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:20,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1193415058, now seen corresponding path program 1 times [2020-12-22 09:50:20,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:20,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824198161] [2020-12-22 09:50:20,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:20,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:20,707 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 09:50:20,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824198161] [2020-12-22 09:50:20,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:50:20,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:50:20,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4292937] [2020-12-22 09:50:20,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:50:20,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:20,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:50:20,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:50:20,711 INFO L87 Difference]: Start difference. First operand 7361 states and 10645 transitions. Second operand 6 states. [2020-12-22 09:50:21,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:21,410 INFO L93 Difference]: Finished difference Result 12739 states and 18226 transitions. [2020-12-22 09:50:21,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:50:21,411 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 09:50:21,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:50:21,441 INFO L225 Difference]: With dead ends: 12739 [2020-12-22 09:50:21,441 INFO L226 Difference]: Without dead ends: 11289 [2020-12-22 09:50:21,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:50:21,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11289 states. [2020-12-22 09:50:22,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11289 to 8809. [2020-12-22 09:50:22,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8809 states. [2020-12-22 09:50:22,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8809 states to 8809 states and 12661 transitions. [2020-12-22 09:50:22,155 INFO L78 Accepts]: Start accepts. Automaton has 8809 states and 12661 transitions. Word has length 78 [2020-12-22 09:50:22,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:22,156 INFO L481 AbstractCegarLoop]: Abstraction has 8809 states and 12661 transitions. [2020-12-22 09:50:22,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:50:22,156 INFO L276 IsEmpty]: Start isEmpty. Operand 8809 states and 12661 transitions. [2020-12-22 09:50:22,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 09:50:22,159 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:22,160 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:50:22,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:50:22,160 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:22,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:22,161 INFO L82 PathProgramCache]: Analyzing trace with hash -42043982, now seen corresponding path program 1 times [2020-12-22 09:50:22,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:22,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498136042] [2020-12-22 09:50:22,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:22,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:22,256 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:50:22,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498136042] [2020-12-22 09:50:22,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:50:22,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:50:22,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912637178] [2020-12-22 09:50:22,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:50:22,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:22,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:50:22,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:50:22,259 INFO L87 Difference]: Start difference. First operand 8809 states and 12661 transitions. Second operand 6 states. [2020-12-22 09:50:22,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:22,973 INFO L93 Difference]: Finished difference Result 13339 states and 19074 transitions. [2020-12-22 09:50:22,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:50:22,974 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 09:50:22,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:50:23,010 INFO L225 Difference]: With dead ends: 13339 [2020-12-22 09:50:23,010 INFO L226 Difference]: Without dead ends: 12313 [2020-12-22 09:50:23,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:50:23,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12313 states. [2020-12-22 09:50:23,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12313 to 9833. [2020-12-22 09:50:23,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9833 states. [2020-12-22 09:50:23,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9833 states to 9833 states and 14101 transitions. [2020-12-22 09:50:23,890 INFO L78 Accepts]: Start accepts. Automaton has 9833 states and 14101 transitions. Word has length 78 [2020-12-22 09:50:23,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:23,890 INFO L481 AbstractCegarLoop]: Abstraction has 9833 states and 14101 transitions. [2020-12-22 09:50:23,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:50:23,890 INFO L276 IsEmpty]: Start isEmpty. Operand 9833 states and 14101 transitions. [2020-12-22 09:50:23,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 09:50:23,896 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:23,897 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:50:23,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:50:23,897 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:23,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:23,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1839803446, now seen corresponding path program 1 times [2020-12-22 09:50:23,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:23,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714777608] [2020-12-22 09:50:23,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:23,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:24,358 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:50:24,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714777608] [2020-12-22 09:50:24,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537402933] [2020-12-22 09:50:24,363 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 09:50:24,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:24,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 09:50:24,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:50:25,073 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:50:25,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:50:25,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2020-12-22 09:50:25,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010590560] [2020-12-22 09:50:25,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 09:50:25,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:25,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 09:50:25,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-12-22 09:50:25,081 INFO L87 Difference]: Start difference. First operand 9833 states and 14101 transitions. Second operand 12 states. [2020-12-22 09:50:31,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:31,050 INFO L93 Difference]: Finished difference Result 39339 states and 54904 transitions. [2020-12-22 09:50:31,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 09:50:31,051 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 79 [2020-12-22 09:50:31,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:50:31,128 INFO L225 Difference]: With dead ends: 39339 [2020-12-22 09:50:31,128 INFO L226 Difference]: Without dead ends: 33705 [2020-12-22 09:50:31,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=438, Invalid=1818, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 09:50:31,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33705 states. [2020-12-22 09:50:33,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33705 to 26657. [2020-12-22 09:50:33,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26657 states. [2020-12-22 09:50:33,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26657 states to 26657 states and 37137 transitions. [2020-12-22 09:50:33,566 INFO L78 Accepts]: Start accepts. Automaton has 26657 states and 37137 transitions. Word has length 79 [2020-12-22 09:50:33,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:33,566 INFO L481 AbstractCegarLoop]: Abstraction has 26657 states and 37137 transitions. [2020-12-22 09:50:33,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 09:50:33,566 INFO L276 IsEmpty]: Start isEmpty. Operand 26657 states and 37137 transitions. [2020-12-22 09:50:33,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:50:33,570 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:33,570 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:50:33,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 09:50:33,780 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:33,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:33,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1196201514, now seen corresponding path program 1 times [2020-12-22 09:50:33,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:33,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488931561] [2020-12-22 09:50:33,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:33,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:34,062 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:50:34,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488931561] [2020-12-22 09:50:34,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452463075] [2020-12-22 09:50:34,063 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 09:50:34,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:34,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 09:50:34,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:50:34,437 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:50:34,802 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:50:34,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:50:34,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:50:34,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273353610] [2020-12-22 09:50:34,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:50:34,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:34,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:50:34,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:50:34,809 INFO L87 Difference]: Start difference. First operand 26657 states and 37137 transitions. Second operand 17 states. [2020-12-22 09:50:38,668 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-22 09:50:48,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:48,981 INFO L93 Difference]: Finished difference Result 154347 states and 210416 transitions. [2020-12-22 09:50:48,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 09:50:48,982 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 80 [2020-12-22 09:50:48,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:50:49,466 INFO L225 Difference]: With dead ends: 154347 [2020-12-22 09:50:49,466 INFO L226 Difference]: Without dead ends: 129977 [2020-12-22 09:50:49,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=578, Invalid=1678, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 09:50:50,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129977 states. [2020-12-22 09:50:56,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129977 to 56425. [2020-12-22 09:50:56,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56425 states. [2020-12-22 09:50:56,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56425 states to 56425 states and 77645 transitions. [2020-12-22 09:50:56,745 INFO L78 Accepts]: Start accepts. Automaton has 56425 states and 77645 transitions. Word has length 80 [2020-12-22 09:50:56,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:56,745 INFO L481 AbstractCegarLoop]: Abstraction has 56425 states and 77645 transitions. [2020-12-22 09:50:56,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:50:56,746 INFO L276 IsEmpty]: Start isEmpty. Operand 56425 states and 77645 transitions. [2020-12-22 09:50:56,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:50:56,753 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:56,753 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:50:56,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:50:56,968 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:56,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:56,970 INFO L82 PathProgramCache]: Analyzing trace with hash 305868284, now seen corresponding path program 1 times [2020-12-22 09:50:56,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:56,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773274309] [2020-12-22 09:50:56,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:57,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:57,445 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:50:57,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773274309] [2020-12-22 09:50:57,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157423915] [2020-12-22 09:50:57,447 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 09:50:57,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:57,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:50:57,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:50:57,873 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:50:58,524 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:50:58,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:50:58,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:50:58,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900581650] [2020-12-22 09:50:58,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:50:58,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:58,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:50:58,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:50:58,528 INFO L87 Difference]: Start difference. First operand 56425 states and 77645 transitions. Second operand 17 states. [2020-12-22 09:50:58,664 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2020-12-22 09:51:02,728 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-12-22 09:51:03,121 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2020-12-22 09:51:04,033 WARN L197 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2020-12-22 09:51:04,399 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-12-22 09:51:34,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:51:34,253 INFO L93 Difference]: Finished difference Result 348731 states and 473109 transitions. [2020-12-22 09:51:34,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 09:51:34,254 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 80 [2020-12-22 09:51:34,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:51:35,319 INFO L225 Difference]: With dead ends: 348731 [2020-12-22 09:51:35,319 INFO L226 Difference]: Without dead ends: 294593 [2020-12-22 09:51:35,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=578, Invalid=1678, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 09:51:35,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294593 states. [2020-12-22 09:51:52,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294593 to 134581. [2020-12-22 09:51:52,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134581 states. [2020-12-22 09:51:53,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134581 states to 134581 states and 183794 transitions. [2020-12-22 09:51:53,126 INFO L78 Accepts]: Start accepts. Automaton has 134581 states and 183794 transitions. Word has length 80 [2020-12-22 09:51:53,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:51:53,126 INFO L481 AbstractCegarLoop]: Abstraction has 134581 states and 183794 transitions. [2020-12-22 09:51:53,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:51:53,127 INFO L276 IsEmpty]: Start isEmpty. Operand 134581 states and 183794 transitions. [2020-12-22 09:51:53,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:51:53,137 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:51:53,137 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:51:53,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:51:53,354 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:51:53,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:51:53,356 INFO L82 PathProgramCache]: Analyzing trace with hash 643661426, now seen corresponding path program 1 times [2020-12-22 09:51:53,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:51:53,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366238880] [2020-12-22 09:51:53,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:51:53,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:53,473 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 09:51:53,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366238880] [2020-12-22 09:51:53,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:51:53,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:51:53,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591682427] [2020-12-22 09:51:53,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:51:53,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:51:53,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:51:53,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:51:53,477 INFO L87 Difference]: Start difference. First operand 134581 states and 183794 transitions. Second operand 3 states. [2020-12-22 09:52:08,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:08,364 INFO L93 Difference]: Finished difference Result 266877 states and 364005 transitions. [2020-12-22 09:52:08,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:52:08,365 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 09:52:08,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:08,583 INFO L225 Difference]: With dead ends: 266877 [2020-12-22 09:52:08,583 INFO L226 Difference]: Without dead ends: 134583 [2020-12-22 09:52:08,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:52:08,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134583 states. [2020-12-22 09:52:22,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134583 to 131629. [2020-12-22 09:52:22,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131629 states. [2020-12-22 09:52:22,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131629 states to 131629 states and 176910 transitions. [2020-12-22 09:52:22,562 INFO L78 Accepts]: Start accepts. Automaton has 131629 states and 176910 transitions. Word has length 80 [2020-12-22 09:52:22,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:22,562 INFO L481 AbstractCegarLoop]: Abstraction has 131629 states and 176910 transitions. [2020-12-22 09:52:22,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:52:22,563 INFO L276 IsEmpty]: Start isEmpty. Operand 131629 states and 176910 transitions. [2020-12-22 09:52:22,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:52:22,570 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:22,570 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:22,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 09:52:22,571 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:22,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:22,571 INFO L82 PathProgramCache]: Analyzing trace with hash 369973714, now seen corresponding path program 1 times [2020-12-22 09:52:22,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:22,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523656734] [2020-12-22 09:52:22,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:22,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:22,621 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 09:52:22,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523656734] [2020-12-22 09:52:22,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:22,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:52:22,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332641209] [2020-12-22 09:52:22,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:52:22,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:22,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:52:22,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:52:22,623 INFO L87 Difference]: Start difference. First operand 131629 states and 176910 transitions. Second operand 3 states. [2020-12-22 09:52:30,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:30,657 INFO L93 Difference]: Finished difference Result 204129 states and 273465 transitions. [2020-12-22 09:52:30,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:52:30,659 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 09:52:30,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:30,791 INFO L225 Difference]: With dead ends: 204129 [2020-12-22 09:52:30,792 INFO L226 Difference]: Without dead ends: 74787 [2020-12-22 09:52:30,873 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 09:52:30,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74787 states. [2020-12-22 09:52:38,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74787 to 72553. [2020-12-22 09:52:38,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72553 states. [2020-12-22 09:52:38,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72553 states to 72553 states and 95194 transitions. [2020-12-22 09:52:38,499 INFO L78 Accepts]: Start accepts. Automaton has 72553 states and 95194 transitions. Word has length 80 [2020-12-22 09:52:38,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:38,499 INFO L481 AbstractCegarLoop]: Abstraction has 72553 states and 95194 transitions. [2020-12-22 09:52:38,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:52:38,499 INFO L276 IsEmpty]: Start isEmpty. Operand 72553 states and 95194 transitions. [2020-12-22 09:52:38,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:52:38,502 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:38,502 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:38,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 09:52:38,502 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:38,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:38,503 INFO L82 PathProgramCache]: Analyzing trace with hash 293809458, now seen corresponding path program 1 times [2020-12-22 09:52:38,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:38,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49656038] [2020-12-22 09:52:38,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:38,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:38,553 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 09:52:38,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49656038] [2020-12-22 09:52:38,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:38,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:52:38,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169043270] [2020-12-22 09:52:38,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:52:38,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:38,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:52:38,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:52:38,555 INFO L87 Difference]: Start difference. First operand 72553 states and 95194 transitions. Second operand 3 states. [2020-12-22 09:52:41,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:41,641 INFO L93 Difference]: Finished difference Result 99245 states and 129877 transitions. [2020-12-22 09:52:41,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:52:41,642 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 09:52:41,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:41,672 INFO L225 Difference]: With dead ends: 99245 [2020-12-22 09:52:41,672 INFO L226 Difference]: Without dead ends: 28979 [2020-12-22 09:52:41,696 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 09:52:41,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28979 states. [2020-12-22 09:52:44,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28979 to 27437. [2020-12-22 09:52:44,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27437 states. [2020-12-22 09:52:44,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27437 states to 27437 states and 35882 transitions. [2020-12-22 09:52:44,443 INFO L78 Accepts]: Start accepts. Automaton has 27437 states and 35882 transitions. Word has length 80 [2020-12-22 09:52:44,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:44,443 INFO L481 AbstractCegarLoop]: Abstraction has 27437 states and 35882 transitions. [2020-12-22 09:52:44,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:52:44,444 INFO L276 IsEmpty]: Start isEmpty. Operand 27437 states and 35882 transitions. [2020-12-22 09:52:44,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:52:44,445 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:44,445 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:44,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 09:52:44,446 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:44,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:44,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1743519558, now seen corresponding path program 1 times [2020-12-22 09:52:44,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:44,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732048807] [2020-12-22 09:52:44,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:44,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:44,520 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 09:52:44,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732048807] [2020-12-22 09:52:44,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:44,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:52:44,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402319522] [2020-12-22 09:52:44,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:52:44,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:44,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:52:44,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:52:44,522 INFO L87 Difference]: Start difference. First operand 27437 states and 35882 transitions. Second operand 6 states. [2020-12-22 09:52:46,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:46,862 INFO L93 Difference]: Finished difference Result 46257 states and 60143 transitions. [2020-12-22 09:52:46,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:52:46,863 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 80 [2020-12-22 09:52:46,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:46,886 INFO L225 Difference]: With dead ends: 46257 [2020-12-22 09:52:46,886 INFO L226 Difference]: Without dead ends: 21226 [2020-12-22 09:52:46,897 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 09:52:46,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21226 states. [2020-12-22 09:52:49,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21226 to 21226. [2020-12-22 09:52:49,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21226 states. [2020-12-22 09:52:49,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21226 states to 21226 states and 27574 transitions. [2020-12-22 09:52:49,121 INFO L78 Accepts]: Start accepts. Automaton has 21226 states and 27574 transitions. Word has length 80 [2020-12-22 09:52:49,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:49,121 INFO L481 AbstractCegarLoop]: Abstraction has 21226 states and 27574 transitions. [2020-12-22 09:52:49,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:52:49,121 INFO L276 IsEmpty]: Start isEmpty. Operand 21226 states and 27574 transitions. [2020-12-22 09:52:49,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:52:49,123 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:49,123 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:49,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 09:52:49,123 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:49,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:49,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1113390490, now seen corresponding path program 1 times [2020-12-22 09:52:49,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:49,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694313276] [2020-12-22 09:52:49,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:49,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:49,191 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 09:52:49,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694313276] [2020-12-22 09:52:49,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:49,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:52:49,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241647453] [2020-12-22 09:52:49,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:52:49,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:49,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:52:49,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:52:49,193 INFO L87 Difference]: Start difference. First operand 21226 states and 27574 transitions. Second operand 6 states. [2020-12-22 09:52:51,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:51,178 INFO L93 Difference]: Finished difference Result 35962 states and 46391 transitions. [2020-12-22 09:52:51,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:52:51,179 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 80 [2020-12-22 09:52:51,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:51,197 INFO L225 Difference]: With dead ends: 35962 [2020-12-22 09:52:51,197 INFO L226 Difference]: Without dead ends: 17062 [2020-12-22 09:52:51,206 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 09:52:51,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17062 states. [2020-12-22 09:52:52,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17062 to 17062. [2020-12-22 09:52:52,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17062 states. [2020-12-22 09:52:52,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17062 states to 17062 states and 22178 transitions. [2020-12-22 09:52:52,913 INFO L78 Accepts]: Start accepts. Automaton has 17062 states and 22178 transitions. Word has length 80 [2020-12-22 09:52:52,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:52,913 INFO L481 AbstractCegarLoop]: Abstraction has 17062 states and 22178 transitions. [2020-12-22 09:52:52,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:52:52,913 INFO L276 IsEmpty]: Start isEmpty. Operand 17062 states and 22178 transitions. [2020-12-22 09:52:52,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:52:52,914 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:52,915 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:52,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 09:52:52,915 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:52,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:52,915 INFO L82 PathProgramCache]: Analyzing trace with hash -68740960, now seen corresponding path program 1 times [2020-12-22 09:52:52,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:52,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032651131] [2020-12-22 09:52:52,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:52,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:53,131 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:52:53,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032651131] [2020-12-22 09:52:53,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542968721] [2020-12-22 09:52:53,132 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 09:52:53,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:53,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 09:52:53,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:52:53,399 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:52:53,712 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:52:53,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:52:53,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:52:53,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397240390] [2020-12-22 09:52:53,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:52:53,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:53,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:52:53,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:52:53,715 INFO L87 Difference]: Start difference. First operand 17062 states and 22178 transitions. Second operand 17 states. [2020-12-22 09:53:00,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:00,058 INFO L93 Difference]: Finished difference Result 55762 states and 71229 transitions. [2020-12-22 09:53:00,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 09:53:00,059 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 81 [2020-12-22 09:53:00,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:00,100 INFO L225 Difference]: With dead ends: 55762 [2020-12-22 09:53:00,101 INFO L226 Difference]: Without dead ends: 43089 [2020-12-22 09:53:00,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=266, Invalid=856, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 09:53:00,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43089 states. [2020-12-22 09:53:03,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43089 to 31061. [2020-12-22 09:53:03,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31061 states. [2020-12-22 09:53:03,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31061 states to 31061 states and 39808 transitions. [2020-12-22 09:53:03,786 INFO L78 Accepts]: Start accepts. Automaton has 31061 states and 39808 transitions. Word has length 81 [2020-12-22 09:53:03,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:03,786 INFO L481 AbstractCegarLoop]: Abstraction has 31061 states and 39808 transitions. [2020-12-22 09:53:03,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:53:03,786 INFO L276 IsEmpty]: Start isEmpty. Operand 31061 states and 39808 transitions. [2020-12-22 09:53:03,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:53:03,788 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:03,788 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:04,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:53:04,003 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:04,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:04,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1149244438, now seen corresponding path program 1 times [2020-12-22 09:53:04,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:04,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652160506] [2020-12-22 09:53:04,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:04,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:04,084 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 09:53:04,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652160506] [2020-12-22 09:53:04,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:04,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:53:04,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247076018] [2020-12-22 09:53:04,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:53:04,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:04,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:53:04,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:53:04,087 INFO L87 Difference]: Start difference. First operand 31061 states and 39808 transitions. Second operand 3 states. [2020-12-22 09:53:06,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:06,236 INFO L93 Difference]: Finished difference Result 43649 states and 55846 transitions. [2020-12-22 09:53:06,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:53:06,237 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:53:06,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:06,257 INFO L225 Difference]: With dead ends: 43649 [2020-12-22 09:53:06,257 INFO L226 Difference]: Without dead ends: 17613 [2020-12-22 09:53:06,271 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 09:53:06,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17613 states. [2020-12-22 09:53:08,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17613 to 17611. [2020-12-22 09:53:08,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17611 states. [2020-12-22 09:53:08,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17611 states to 17611 states and 22300 transitions. [2020-12-22 09:53:08,195 INFO L78 Accepts]: Start accepts. Automaton has 17611 states and 22300 transitions. Word has length 81 [2020-12-22 09:53:08,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:08,195 INFO L481 AbstractCegarLoop]: Abstraction has 17611 states and 22300 transitions. [2020-12-22 09:53:08,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:53:08,196 INFO L276 IsEmpty]: Start isEmpty. Operand 17611 states and 22300 transitions. [2020-12-22 09:53:08,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:53:08,197 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:08,197 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:08,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 09:53:08,198 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:08,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:08,198 INFO L82 PathProgramCache]: Analyzing trace with hash -549108429, now seen corresponding path program 1 times [2020-12-22 09:53:08,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:08,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303301881] [2020-12-22 09:53:08,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:08,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:09,971 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:53:09,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303301881] [2020-12-22 09:53:09,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150830257] [2020-12-22 09:53:09,972 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 09:53:10,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:10,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 09:53:10,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:53:10,578 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:53:10,929 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 40 [2020-12-22 09:53:11,753 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:53:11,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:53:11,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 12] total 39 [2020-12-22 09:53:11,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133491665] [2020-12-22 09:53:11,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 09:53:11,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:11,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 09:53:11,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1380, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 09:53:11,756 INFO L87 Difference]: Start difference. First operand 17611 states and 22300 transitions. Second operand 39 states. [2020-12-22 09:53:12,158 WARN L197 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 78 [2020-12-22 09:53:13,709 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-12-22 09:53:13,910 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2020-12-22 09:53:14,205 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2020-12-22 09:53:14,475 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2020-12-22 09:53:14,922 WARN L197 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 62 [2020-12-22 09:53:15,448 WARN L197 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 87 [2020-12-22 09:53:16,047 WARN L197 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 96 [2020-12-22 09:53:16,618 WARN L197 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 91 [2020-12-22 09:53:16,994 WARN L197 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 80 [2020-12-22 09:53:17,404 WARN L197 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 80 [2020-12-22 09:53:17,752 WARN L197 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-12-22 09:53:18,179 WARN L197 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 77 [2020-12-22 09:53:18,518 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-12-22 09:53:18,954 WARN L197 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 77 [2020-12-22 09:53:19,273 WARN L197 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2020-12-22 09:53:19,561 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-12-22 09:53:20,082 WARN L197 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-12-22 09:53:20,361 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-12-22 09:53:20,766 WARN L197 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 74 [2020-12-22 09:53:21,144 WARN L197 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-12-22 09:53:21,437 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-12-22 09:53:21,771 WARN L197 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-12-22 09:53:22,052 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-12-22 09:53:22,401 WARN L197 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-12-22 09:53:22,845 WARN L197 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 74 [2020-12-22 09:53:23,084 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 33 [2020-12-22 09:53:23,575 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-12-22 09:53:23,933 WARN L197 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2020-12-22 09:53:24,175 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:53:24,487 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 37 [2020-12-22 09:53:24,859 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2020-12-22 09:53:25,274 WARN L197 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 71 [2020-12-22 09:53:25,502 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-12-22 09:53:26,134 WARN L197 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 43 [2020-12-22 09:53:26,504 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-12-22 09:53:26,765 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-12-22 09:53:27,051 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:53:27,710 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-12-22 09:53:28,013 WARN L197 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-12-22 09:53:28,326 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-12-22 09:53:28,739 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 09:53:29,282 WARN L197 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2020-12-22 09:53:29,666 WARN L197 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2020-12-22 09:53:30,152 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-12-22 09:53:30,874 WARN L197 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-12-22 09:53:32,028 WARN L197 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2020-12-22 09:53:32,458 WARN L197 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2020-12-22 09:53:33,327 WARN L197 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 73 [2020-12-22 09:53:33,842 WARN L197 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 73 [2020-12-22 09:53:34,224 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-12-22 09:53:34,558 WARN L197 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2020-12-22 09:53:35,035 WARN L197 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 69 [2020-12-22 09:53:35,354 WARN L197 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2020-12-22 09:53:35,888 WARN L197 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 75 [2020-12-22 09:53:36,388 WARN L197 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 79 [2020-12-22 09:53:36,725 WARN L197 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2020-12-22 09:53:37,433 WARN L197 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 86 [2020-12-22 09:53:37,989 WARN L197 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 91 [2020-12-22 09:53:38,451 WARN L197 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 82 [2020-12-22 09:53:38,717 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-12-22 09:53:39,072 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-12-22 09:53:39,574 WARN L197 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 86 [2020-12-22 09:53:40,439 WARN L197 SmtUtils]: Spent 688.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 108 [2020-12-22 09:53:40,776 WARN L197 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63