/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-24 02:12:57,836 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 02:12:57,839 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 02:12:57,894 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-24 02:12:57,923 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 02:12:57,926 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 02:12:57,928 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 02:12:57,930 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 02:12:57,931 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 02:12:57,934 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 02:12:57,954 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 02:12:57,962 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 02:12:57,964 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 02:12:57,966 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 02:12:57,967 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 02:12:57,969 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 02:12:57,975 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-24 02:12:57,990 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-24 02:12:58,012 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 02:12:58,013 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 02:12:58,018 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 02:12:58,018 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 02:12:58,019 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 02:12:58,019 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 02:12:58,019 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 02:12:58,019 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 02:12:58,019 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 02:12:58,020 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 02:12:58,021 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 02:12:58,021 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 02:12:58,021 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 02:12:58,022 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 02:12:58,022 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 02:12:58,022 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-24 02:12:58,022 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 02:12:58,023 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 02:12:58,023 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 02:12:58,023 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 02:12:58,023 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-24 02:12:58,024 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 02:12:58,024 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-10-24 02:12:58,406 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 02:12:58,437 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 02:12:58,440 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 02:12:58,442 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 02:12:58,442 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 02:12:58,444 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label24.c [2020-10-24 02:12:58,531 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f1668cd3/b5f5973457dd4d12b8636c374a7b3bde/FLAGa8023ab6e [2020-10-24 02:12:59,397 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 02:12:59,400 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label24.c [2020-10-24 02:12:59,416 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f1668cd3/b5f5973457dd4d12b8636c374a7b3bde/FLAGa8023ab6e [2020-10-24 02:12:59,579 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f1668cd3/b5f5973457dd4d12b8636c374a7b3bde [2020-10-24 02:12:59,583 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 02:12:59,592 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-24 02:12:59,597 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 02:12:59,598 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 02:12:59,602 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 02:12:59,603 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:12:59" (1/1) ... [2020-10-24 02:12:59,607 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e9234a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:12:59, skipping insertion in model container [2020-10-24 02:12:59,608 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:12:59" (1/1) ... [2020-10-24 02:12:59,617 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 02:12:59,691 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 02:13:00,245 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:13:00,256 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 02:13:00,454 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:13:00,474 INFO L208 MainTranslator]: Completed translation [2020-10-24 02:13:00,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:13:00 WrapperNode [2020-10-24 02:13:00,475 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 02:13:00,476 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 02:13:00,477 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 02:13:00,477 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 02:13:00,491 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:13:00" (1/1) ... [2020-10-24 02:13:00,491 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:13:00" (1/1) ... [2020-10-24 02:13:00,517 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:13:00" (1/1) ... [2020-10-24 02:13:00,517 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:13:00" (1/1) ... [2020-10-24 02:13:00,577 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:13:00" (1/1) ... [2020-10-24 02:13:00,600 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:13:00" (1/1) ... [2020-10-24 02:13:00,615 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:13:00" (1/1) ... [2020-10-24 02:13:00,623 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 02:13:00,624 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 02:13:00,624 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 02:13:00,624 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 02:13:00,625 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:13:00" (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 [2020-10-24 02:13:00,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-24 02:13:00,707 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 02:13:00,707 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-24 02:13:00,707 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-24 02:13:00,707 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-24 02:13:00,707 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-24 02:13:00,707 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-24 02:13:00,708 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-24 02:13:00,708 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-24 02:13:00,708 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 02:13:00,708 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-24 02:13:00,708 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-24 02:13:00,708 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-24 02:13:00,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-24 02:13:00,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 02:13:00,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 02:13:00,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-24 02:13:00,709 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 02:13:00,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 02:13:02,743 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 02:13:02,744 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-24 02:13:02,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:13:02 BoogieIcfgContainer [2020-10-24 02:13:02,747 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 02:13:02,751 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 02:13:02,751 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 02:13:02,755 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 02:13:02,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:12:59" (1/3) ... [2020-10-24 02:13:02,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20ae8833 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:13:02, skipping insertion in model container [2020-10-24 02:13:02,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:13:00" (2/3) ... [2020-10-24 02:13:02,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20ae8833 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:13:02, skipping insertion in model container [2020-10-24 02:13:02,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:13:02" (3/3) ... [2020-10-24 02:13:02,758 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem14_label24.c [2020-10-24 02:13:02,771 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-24 02:13:02,777 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 02:13:02,793 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 02:13:02,828 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 02:13:02,829 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 02:13:02,829 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-24 02:13:02,829 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 02:13:02,829 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 02:13:02,829 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 02:13:02,830 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 02:13:02,830 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 02:13:02,872 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states. [2020-10-24 02:13:02,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-24 02:13:02,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:13:02,894 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, 1, 1] [2020-10-24 02:13:02,894 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:13:02,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:13:02,904 INFO L82 PathProgramCache]: Analyzing trace with hash -815547167, now seen corresponding path program 1 times [2020-10-24 02:13:02,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:13:02,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368007712] [2020-10-24 02:13:02,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:13:03,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:13:03,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:13:03,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:13:03,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:13:03,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368007712] [2020-10-24 02:13:03,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:13:03,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-24 02:13:03,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135499845] [2020-10-24 02:13:03,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-24 02:13:03,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:13:03,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-24 02:13:03,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-24 02:13:03,548 INFO L87 Difference]: Start difference. First operand 690 states. Second operand 5 states. [2020-10-24 02:13:08,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:13:08,477 INFO L93 Difference]: Finished difference Result 1779 states and 2507 transitions. [2020-10-24 02:13:08,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-24 02:13:08,480 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-10-24 02:13:08,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:13:08,507 INFO L225 Difference]: With dead ends: 1779 [2020-10-24 02:13:08,507 INFO L226 Difference]: Without dead ends: 1034 [2020-10-24 02:13:08,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-24 02:13:08,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2020-10-24 02:13:08,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 1004. [2020-10-24 02:13:08,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1004 states. [2020-10-24 02:13:08,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 1352 transitions. [2020-10-24 02:13:08,798 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 1352 transitions. Word has length 69 [2020-10-24 02:13:08,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:13:08,799 INFO L481 AbstractCegarLoop]: Abstraction has 1004 states and 1352 transitions. [2020-10-24 02:13:08,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-24 02:13:08,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 1352 transitions. [2020-10-24 02:13:08,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-24 02:13:08,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:13:08,810 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:13:08,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 02:13:08,811 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:13:08,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:13:08,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1317513359, now seen corresponding path program 1 times [2020-10-24 02:13:08,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:13:08,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1868965110] [2020-10-24 02:13:08,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:13:08,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:13:09,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:13:09,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:13:09,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-24 02:13:09,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:13:09,292 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:13:09,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1868965110] [2020-10-24 02:13:09,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:13:09,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-24 02:13:09,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872793458] [2020-10-24 02:13:09,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-24 02:13:09,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:13:09,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-24 02:13:09,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-24 02:13:09,296 INFO L87 Difference]: Start difference. First operand 1004 states and 1352 transitions. Second operand 8 states. [2020-10-24 02:13:13,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:13:13,517 INFO L93 Difference]: Finished difference Result 2238 states and 3084 transitions. [2020-10-24 02:13:13,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-24 02:13:13,518 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 153 [2020-10-24 02:13:13,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:13:13,531 INFO L225 Difference]: With dead ends: 2238 [2020-10-24 02:13:13,531 INFO L226 Difference]: Without dead ends: 1257 [2020-10-24 02:13:13,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-24 02:13:13,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2020-10-24 02:13:13,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 1010. [2020-10-24 02:13:13,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1010 states. [2020-10-24 02:13:13,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 1262 transitions. [2020-10-24 02:13:13,692 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 1262 transitions. Word has length 153 [2020-10-24 02:13:13,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:13:13,695 INFO L481 AbstractCegarLoop]: Abstraction has 1010 states and 1262 transitions. [2020-10-24 02:13:13,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-24 02:13:13,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 1262 transitions. [2020-10-24 02:13:13,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-24 02:13:13,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:13:13,711 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:13:13,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 02:13:13,711 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:13:13,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:13:13,713 INFO L82 PathProgramCache]: Analyzing trace with hash -682981203, now seen corresponding path program 1 times [2020-10-24 02:13:13,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:13:13,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362719049] [2020-10-24 02:13:13,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:13:13,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:13:13,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:13:13,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:13:13,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-24 02:13:13,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:13:14,047 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 43 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:13:14,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362719049] [2020-10-24 02:13:14,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:13:14,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-24 02:13:14,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329680443] [2020-10-24 02:13:14,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-24 02:13:14,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:13:14,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-24 02:13:14,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-24 02:13:14,050 INFO L87 Difference]: Start difference. First operand 1010 states and 1262 transitions. Second operand 5 states. [2020-10-24 02:13:18,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:13:18,125 INFO L93 Difference]: Finished difference Result 2720 states and 3503 transitions. [2020-10-24 02:13:18,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-24 02:13:18,126 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 163 [2020-10-24 02:13:18,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:13:18,146 INFO L225 Difference]: With dead ends: 2720 [2020-10-24 02:13:18,147 INFO L226 Difference]: Without dead ends: 1733 [2020-10-24 02:13:18,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-24 02:13:18,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1733 states. [2020-10-24 02:13:18,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1733 to 1394. [2020-10-24 02:13:18,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1394 states. [2020-10-24 02:13:18,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1394 states to 1394 states and 1734 transitions. [2020-10-24 02:13:18,452 INFO L78 Accepts]: Start accepts. Automaton has 1394 states and 1734 transitions. Word has length 163 [2020-10-24 02:13:18,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:13:18,454 INFO L481 AbstractCegarLoop]: Abstraction has 1394 states and 1734 transitions. [2020-10-24 02:13:18,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-24 02:13:18,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1394 states and 1734 transitions. [2020-10-24 02:13:18,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2020-10-24 02:13:18,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:13:18,460 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:13:18,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-24 02:13:18,461 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:13:18,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:13:18,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1499721525, now seen corresponding path program 1 times [2020-10-24 02:13:18,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:13:18,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737981308] [2020-10-24 02:13:18,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:13:18,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:13:18,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:13:18,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:13:18,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-24 02:13:18,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:13:18,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2020-10-24 02:13:18,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:13:19,634 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 117 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-24 02:13:19,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737981308] [2020-10-24 02:13:19,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:13:19,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-24 02:13:19,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525009137] [2020-10-24 02:13:19,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-24 02:13:19,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:13:19,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-24 02:13:19,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-24 02:13:19,639 INFO L87 Difference]: Start difference. First operand 1394 states and 1734 transitions. Second operand 12 states. [2020-10-24 02:13:20,085 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 80 [2020-10-24 02:13:20,530 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 74 [2020-10-24 02:13:21,439 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2020-10-24 02:13:22,692 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2020-10-24 02:13:23,252 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 67 [2020-10-24 02:13:27,161 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2020-10-24 02:13:28,107 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 68 [2020-10-24 02:13:30,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:13:30,071 INFO L93 Difference]: Finished difference Result 5036 states and 6914 transitions. [2020-10-24 02:13:30,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-24 02:13:30,072 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 276 [2020-10-24 02:13:30,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:13:30,118 INFO L225 Difference]: With dead ends: 5036 [2020-10-24 02:13:30,118 INFO L226 Difference]: Without dead ends: 3665 [2020-10-24 02:13:30,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=283, Invalid=977, Unknown=0, NotChecked=0, Total=1260 [2020-10-24 02:13:30,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3665 states. [2020-10-24 02:13:30,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3665 to 3011. [2020-10-24 02:13:30,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3011 states. [2020-10-24 02:13:30,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3011 states to 3011 states and 3767 transitions. [2020-10-24 02:13:30,843 INFO L78 Accepts]: Start accepts. Automaton has 3011 states and 3767 transitions. Word has length 276 [2020-10-24 02:13:30,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:13:30,844 INFO L481 AbstractCegarLoop]: Abstraction has 3011 states and 3767 transitions. [2020-10-24 02:13:30,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-24 02:13:30,844 INFO L276 IsEmpty]: Start isEmpty. Operand 3011 states and 3767 transitions. [2020-10-24 02:13:30,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2020-10-24 02:13:30,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:13:30,853 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:13:30,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-24 02:13:30,854 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:13:30,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:13:30,854 INFO L82 PathProgramCache]: Analyzing trace with hash 2132790994, now seen corresponding path program 1 times [2020-10-24 02:13:30,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:13:30,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160806409] [2020-10-24 02:13:30,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:13:30,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:13:31,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:13:31,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:13:31,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-24 02:13:31,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:13:31,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2020-10-24 02:13:31,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:13:31,478 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 117 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-24 02:13:31,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160806409] [2020-10-24 02:13:31,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:13:31,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-24 02:13:31,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095411874] [2020-10-24 02:13:31,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-24 02:13:31,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:13:31,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-24 02:13:31,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-24 02:13:31,483 INFO L87 Difference]: Start difference. First operand 3011 states and 3767 transitions. Second operand 11 states. [2020-10-24 02:13:38,903 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-24 02:13:41,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:13:41,590 INFO L93 Difference]: Finished difference Result 8674 states and 11584 transitions. [2020-10-24 02:13:41,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-24 02:13:41,590 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 294 [2020-10-24 02:13:41,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:13:41,654 INFO L225 Difference]: With dead ends: 8674 [2020-10-24 02:13:41,654 INFO L226 Difference]: Without dead ends: 5686 [2020-10-24 02:13:41,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=172, Invalid=530, Unknown=0, NotChecked=0, Total=702 [2020-10-24 02:13:41,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5686 states. [2020-10-24 02:13:42,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5686 to 4227. [2020-10-24 02:13:42,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4227 states. [2020-10-24 02:13:42,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4227 states to 4227 states and 5191 transitions. [2020-10-24 02:13:42,589 INFO L78 Accepts]: Start accepts. Automaton has 4227 states and 5191 transitions. Word has length 294 [2020-10-24 02:13:42,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:13:42,590 INFO L481 AbstractCegarLoop]: Abstraction has 4227 states and 5191 transitions. [2020-10-24 02:13:42,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-24 02:13:42,590 INFO L276 IsEmpty]: Start isEmpty. Operand 4227 states and 5191 transitions. [2020-10-24 02:13:42,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-10-24 02:13:42,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:13:42,605 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:13:42,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-24 02:13:42,606 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:13:42,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:13:42,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1393617540, now seen corresponding path program 1 times [2020-10-24 02:13:42,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:13:42,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747186961] [2020-10-24 02:13:42,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:13:42,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:13:42,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:13:42,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:13:42,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-24 02:13:42,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:13:43,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 218 [2020-10-24 02:13:43,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:13:43,245 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 88 proven. 69 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-24 02:13:43,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [747186961] [2020-10-24 02:13:43,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:13:43,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-24 02:13:43,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525836766] [2020-10-24 02:13:43,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-24 02:13:43,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:13:43,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-24 02:13:43,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-24 02:13:43,250 INFO L87 Difference]: Start difference. First operand 4227 states and 5191 transitions. Second operand 7 states. [2020-10-24 02:13:47,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:13:47,237 INFO L93 Difference]: Finished difference Result 9114 states and 11306 transitions. [2020-10-24 02:13:47,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-24 02:13:47,238 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 342 [2020-10-24 02:13:47,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:13:47,276 INFO L225 Difference]: With dead ends: 9114 [2020-10-24 02:13:47,276 INFO L226 Difference]: Without dead ends: 4910 [2020-10-24 02:13:47,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-24 02:13:47,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4910 states. [2020-10-24 02:13:48,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4910 to 4671. [2020-10-24 02:13:48,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4671 states. [2020-10-24 02:13:48,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4671 states to 4671 states and 5716 transitions. [2020-10-24 02:13:48,206 INFO L78 Accepts]: Start accepts. Automaton has 4671 states and 5716 transitions. Word has length 342 [2020-10-24 02:13:48,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:13:48,207 INFO L481 AbstractCegarLoop]: Abstraction has 4671 states and 5716 transitions. [2020-10-24 02:13:48,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-24 02:13:48,207 INFO L276 IsEmpty]: Start isEmpty. Operand 4671 states and 5716 transitions. [2020-10-24 02:13:48,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2020-10-24 02:13:48,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:13:48,229 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:13:48,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-24 02:13:48,230 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:13:48,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:13:48,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1734907294, now seen corresponding path program 1 times [2020-10-24 02:13:48,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:13:48,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [372258036] [2020-10-24 02:13:48,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:13:48,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:13:48,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:13:48,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:13:48,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-24 02:13:48,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:13:48,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2020-10-24 02:13:48,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:13:48,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 324 [2020-10-24 02:13:48,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:13:48,934 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 240 proven. 73 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-10-24 02:13:48,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [372258036] [2020-10-24 02:13:48,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:13:48,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-24 02:13:48,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020768652] [2020-10-24 02:13:48,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-24 02:13:48,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:13:48,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-24 02:13:48,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-24 02:13:48,938 INFO L87 Difference]: Start difference. First operand 4671 states and 5716 transitions. Second operand 9 states. [2020-10-24 02:13:57,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:13:57,680 INFO L93 Difference]: Finished difference Result 12168 states and 15503 transitions. [2020-10-24 02:13:57,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-24 02:13:57,681 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 448 [2020-10-24 02:13:57,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:13:57,746 INFO L225 Difference]: With dead ends: 12168 [2020-10-24 02:13:57,746 INFO L226 Difference]: Without dead ends: 5442 [2020-10-24 02:13:57,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2020-10-24 02:13:57,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5442 states. [2020-10-24 02:13:59,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5442 to 5430. [2020-10-24 02:13:59,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5430 states. [2020-10-24 02:13:59,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5430 states to 5430 states and 6896 transitions. [2020-10-24 02:13:59,087 INFO L78 Accepts]: Start accepts. Automaton has 5430 states and 6896 transitions. Word has length 448 [2020-10-24 02:13:59,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:13:59,088 INFO L481 AbstractCegarLoop]: Abstraction has 5430 states and 6896 transitions. [2020-10-24 02:13:59,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-24 02:13:59,088 INFO L276 IsEmpty]: Start isEmpty. Operand 5430 states and 6896 transitions. [2020-10-24 02:13:59,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2020-10-24 02:13:59,112 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:13:59,112 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:13:59,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-24 02:13:59,113 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:13:59,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:13:59,113 INFO L82 PathProgramCache]: Analyzing trace with hash -2044318254, now seen corresponding path program 1 times [2020-10-24 02:13:59,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:13:59,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [734598885] [2020-10-24 02:13:59,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:13:59,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:13:59,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:13:59,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:13:59,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-24 02:13:59,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:13:59,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-10-24 02:13:59,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:13:59,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 336 [2020-10-24 02:13:59,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:13:59,962 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 254 proven. 73 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-10-24 02:13:59,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [734598885] [2020-10-24 02:13:59,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:13:59,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-24 02:13:59,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303796585] [2020-10-24 02:13:59,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-24 02:13:59,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:13:59,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-24 02:13:59,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-24 02:13:59,966 INFO L87 Difference]: Start difference. First operand 5430 states and 6896 transitions. Second operand 10 states. [2020-10-24 02:14:00,819 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2020-10-24 02:14:02,701 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2020-10-24 02:14:04,528 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-24 02:14:09,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:14:09,210 INFO L93 Difference]: Finished difference Result 12153 states and 15966 transitions. [2020-10-24 02:14:09,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-24 02:14:09,211 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 460 [2020-10-24 02:14:09,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:14:09,300 INFO L225 Difference]: With dead ends: 12153 [2020-10-24 02:14:09,300 INFO L226 Difference]: Without dead ends: 6756 [2020-10-24 02:14:09,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=286, Invalid=836, Unknown=0, NotChecked=0, Total=1122 [2020-10-24 02:14:09,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6756 states. [2020-10-24 02:14:10,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6756 to 6411. [2020-10-24 02:14:10,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6411 states. [2020-10-24 02:14:10,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6411 states to 6411 states and 8121 transitions. [2020-10-24 02:14:10,905 INFO L78 Accepts]: Start accepts. Automaton has 6411 states and 8121 transitions. Word has length 460 [2020-10-24 02:14:10,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:14:10,906 INFO L481 AbstractCegarLoop]: Abstraction has 6411 states and 8121 transitions. [2020-10-24 02:14:10,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-24 02:14:10,907 INFO L276 IsEmpty]: Start isEmpty. Operand 6411 states and 8121 transitions. [2020-10-24 02:14:10,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2020-10-24 02:14:10,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:14:10,930 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:14:10,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-24 02:14:10,931 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:14:10,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:14:10,932 INFO L82 PathProgramCache]: Analyzing trace with hash 518034488, now seen corresponding path program 1 times [2020-10-24 02:14:10,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:14:10,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [240677931] [2020-10-24 02:14:10,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:14:10,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:14:11,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:14:11,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:14:11,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-24 02:14:11,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:14:11,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2020-10-24 02:14:11,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:14:11,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 341 [2020-10-24 02:14:11,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:14:11,493 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 257 proven. 73 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-10-24 02:14:11,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [240677931] [2020-10-24 02:14:11,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:14:11,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-24 02:14:11,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073759386] [2020-10-24 02:14:11,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-24 02:14:11,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:14:11,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-24 02:14:11,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-24 02:14:11,496 INFO L87 Difference]: Start difference. First operand 6411 states and 8121 transitions. Second operand 7 states. [2020-10-24 02:14:17,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:14:17,672 INFO L93 Difference]: Finished difference Result 12822 states and 16234 transitions. [2020-10-24 02:14:17,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-24 02:14:17,673 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 465 [2020-10-24 02:14:17,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:14:17,719 INFO L225 Difference]: With dead ends: 12822 [2020-10-24 02:14:17,719 INFO L226 Difference]: Without dead ends: 6444 [2020-10-24 02:14:17,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-24 02:14:17,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6444 states. [2020-10-24 02:14:19,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6444 to 6413. [2020-10-24 02:14:19,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6413 states. [2020-10-24 02:14:19,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6413 states to 6413 states and 7795 transitions. [2020-10-24 02:14:19,065 INFO L78 Accepts]: Start accepts. Automaton has 6413 states and 7795 transitions. Word has length 465 [2020-10-24 02:14:19,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:14:19,066 INFO L481 AbstractCegarLoop]: Abstraction has 6413 states and 7795 transitions. [2020-10-24 02:14:19,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-24 02:14:19,066 INFO L276 IsEmpty]: Start isEmpty. Operand 6413 states and 7795 transitions. [2020-10-24 02:14:19,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2020-10-24 02:14:19,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:14:19,082 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:14:19,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-24 02:14:19,082 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:14:19,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:14:19,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1623823825, now seen corresponding path program 1 times [2020-10-24 02:14:19,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:14:19,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [408577232] [2020-10-24 02:14:19,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:14:19,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:14:19,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:14:19,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:14:19,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-24 02:14:19,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:14:19,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-10-24 02:14:19,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:14:19,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 206 [2020-10-24 02:14:19,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:14:19,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 395 [2020-10-24 02:14:19,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:14:20,324 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 272 proven. 142 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2020-10-24 02:14:20,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [408577232] [2020-10-24 02:14:20,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:14:20,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-24 02:14:20,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104803070] [2020-10-24 02:14:20,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-24 02:14:20,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:14:20,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-24 02:14:20,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-24 02:14:20,327 INFO L87 Difference]: Start difference. First operand 6413 states and 7795 transitions. Second operand 13 states. [2020-10-24 02:14:20,765 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2020-10-24 02:14:21,106 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2020-10-24 02:14:21,410 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2020-10-24 02:14:21,626 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 70 [2020-10-24 02:14:22,414 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 74 [2020-10-24 02:14:22,961 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 69 [2020-10-24 02:14:23,406 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2020-10-24 02:14:24,128 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 78 [2020-10-24 02:14:24,549 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2020-10-24 02:14:24,995 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 77 [2020-10-24 02:14:25,273 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 71 [2020-10-24 02:14:25,701 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2020-10-24 02:14:26,081 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 68 [2020-10-24 02:14:26,614 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2020-10-24 02:14:27,185 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2020-10-24 02:14:27,501 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 68 [2020-10-24 02:14:30,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:14:30,339 INFO L93 Difference]: Finished difference Result 13145 states and 16046 transitions. [2020-10-24 02:14:30,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-24 02:14:30,340 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 519 [2020-10-24 02:14:30,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:14:30,388 INFO L225 Difference]: With dead ends: 13145 [2020-10-24 02:14:30,388 INFO L226 Difference]: Without dead ends: 6446 [2020-10-24 02:14:30,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=345, Invalid=987, Unknown=0, NotChecked=0, Total=1332 [2020-10-24 02:14:30,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6446 states. [2020-10-24 02:14:32,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6446 to 6361. [2020-10-24 02:14:32,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6361 states. [2020-10-24 02:14:32,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6361 states to 6361 states and 7561 transitions. [2020-10-24 02:14:32,030 INFO L78 Accepts]: Start accepts. Automaton has 6361 states and 7561 transitions. Word has length 519 [2020-10-24 02:14:32,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:14:32,030 INFO L481 AbstractCegarLoop]: Abstraction has 6361 states and 7561 transitions. [2020-10-24 02:14:32,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-24 02:14:32,030 INFO L276 IsEmpty]: Start isEmpty. Operand 6361 states and 7561 transitions. [2020-10-24 02:14:32,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2020-10-24 02:14:32,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:14:32,046 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:14:32,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-24 02:14:32,046 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:14:32,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:14:32,047 INFO L82 PathProgramCache]: Analyzing trace with hash -351943718, now seen corresponding path program 1 times [2020-10-24 02:14:32,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:14:32,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [498269309] [2020-10-24 02:14:32,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:14:32,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:14:32,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:14:32,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:14:32,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-24 02:14:32,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:14:32,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-10-24 02:14:32,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:14:32,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2020-10-24 02:14:32,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:14:32,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 418 [2020-10-24 02:14:32,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:14:32,921 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 388 proven. 77 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-10-24 02:14:32,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [498269309] [2020-10-24 02:14:32,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:14:32,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-24 02:14:32,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435011262] [2020-10-24 02:14:32,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-24 02:14:32,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:14:32,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-24 02:14:32,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-24 02:14:32,924 INFO L87 Difference]: Start difference. First operand 6361 states and 7561 transitions. Second operand 9 states. [2020-10-24 02:14:40,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:14:40,825 INFO L93 Difference]: Finished difference Result 13497 states and 16172 transitions. [2020-10-24 02:14:40,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-24 02:14:40,826 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 542 [2020-10-24 02:14:40,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:14:40,864 INFO L225 Difference]: With dead ends: 13497 [2020-10-24 02:14:40,864 INFO L226 Difference]: Without dead ends: 4535 [2020-10-24 02:14:40,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2020-10-24 02:14:40,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4535 states. [2020-10-24 02:14:41,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4535 to 4511. [2020-10-24 02:14:41,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4511 states. [2020-10-24 02:14:41,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4511 states to 4511 states and 4800 transitions. [2020-10-24 02:14:41,961 INFO L78 Accepts]: Start accepts. Automaton has 4511 states and 4800 transitions. Word has length 542 [2020-10-24 02:14:41,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:14:41,962 INFO L481 AbstractCegarLoop]: Abstraction has 4511 states and 4800 transitions. [2020-10-24 02:14:41,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-24 02:14:41,962 INFO L276 IsEmpty]: Start isEmpty. Operand 4511 states and 4800 transitions. [2020-10-24 02:14:41,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 586 [2020-10-24 02:14:41,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:14:41,970 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:14:41,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-24 02:14:41,971 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:14:41,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:14:41,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1640235182, now seen corresponding path program 1 times [2020-10-24 02:14:41,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:14:41,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [651679352] [2020-10-24 02:14:41,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:14:42,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:14:42,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:14:42,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:14:42,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-24 02:14:42,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:14:42,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-10-24 02:14:42,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:14:42,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-10-24 02:14:42,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:14:42,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 461 [2020-10-24 02:14:42,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:14:42,796 INFO L134 CoverageAnalysis]: Checked inductivity of 769 backedges. 435 proven. 73 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2020-10-24 02:14:42,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [651679352] [2020-10-24 02:14:42,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:14:42,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-24 02:14:42,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777423117] [2020-10-24 02:14:42,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-24 02:14:42,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:14:42,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-24 02:14:42,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-24 02:14:42,799 INFO L87 Difference]: Start difference. First operand 4511 states and 4800 transitions. Second operand 7 states. [2020-10-24 02:14:46,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:14:46,140 INFO L93 Difference]: Finished difference Result 10181 states and 10899 transitions. [2020-10-24 02:14:46,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-24 02:14:46,141 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 585 [2020-10-24 02:14:46,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:14:46,167 INFO L225 Difference]: With dead ends: 10181 [2020-10-24 02:14:46,168 INFO L226 Difference]: Without dead ends: 5882 [2020-10-24 02:14:46,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-24 02:14:46,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5882 states. [2020-10-24 02:14:47,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5882 to 5482. [2020-10-24 02:14:47,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5482 states. [2020-10-24 02:14:47,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5482 states to 5482 states and 5856 transitions. [2020-10-24 02:14:47,339 INFO L78 Accepts]: Start accepts. Automaton has 5482 states and 5856 transitions. Word has length 585 [2020-10-24 02:14:47,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:14:47,339 INFO L481 AbstractCegarLoop]: Abstraction has 5482 states and 5856 transitions. [2020-10-24 02:14:47,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-24 02:14:47,339 INFO L276 IsEmpty]: Start isEmpty. Operand 5482 states and 5856 transitions. [2020-10-24 02:14:47,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 672 [2020-10-24 02:14:47,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:14:47,351 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:14:47,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-24 02:14:47,351 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:14:47,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:14:47,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1523097282, now seen corresponding path program 1 times [2020-10-24 02:14:47,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:14:47,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1459754753] [2020-10-24 02:14:47,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:14:47,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:14:47,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:14:47,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:14:47,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-24 02:14:47,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:14:47,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2020-10-24 02:14:47,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:14:47,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 358 [2020-10-24 02:14:47,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:14:48,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 547 [2020-10-24 02:14:48,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:14:48,405 INFO L134 CoverageAnalysis]: Checked inductivity of 877 backedges. 407 proven. 42 refuted. 0 times theorem prover too weak. 428 trivial. 0 not checked. [2020-10-24 02:14:48,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1459754753] [2020-10-24 02:14:48,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:14:48,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-24 02:14:48,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679240277] [2020-10-24 02:14:48,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-24 02:14:48,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:14:48,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-24 02:14:48,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-24 02:14:48,408 INFO L87 Difference]: Start difference. First operand 5482 states and 5856 transitions. Second operand 11 states. [2020-10-24 02:14:49,814 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-24 02:14:57,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:14:57,037 INFO L93 Difference]: Finished difference Result 10658 states and 11376 transitions. [2020-10-24 02:14:57,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-24 02:14:57,038 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 671 [2020-10-24 02:14:57,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:14:57,057 INFO L225 Difference]: With dead ends: 10658 [2020-10-24 02:14:57,057 INFO L226 Difference]: Without dead ends: 5388 [2020-10-24 02:14:57,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=352, Invalid=1370, Unknown=0, NotChecked=0, Total=1722 [2020-10-24 02:14:57,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5388 states. [2020-10-24 02:14:58,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5388 to 4977. [2020-10-24 02:14:58,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4977 states. [2020-10-24 02:14:58,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4977 states to 4977 states and 5204 transitions. [2020-10-24 02:14:58,169 INFO L78 Accepts]: Start accepts. Automaton has 4977 states and 5204 transitions. Word has length 671 [2020-10-24 02:14:58,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:14:58,169 INFO L481 AbstractCegarLoop]: Abstraction has 4977 states and 5204 transitions. [2020-10-24 02:14:58,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-24 02:14:58,169 INFO L276 IsEmpty]: Start isEmpty. Operand 4977 states and 5204 transitions. [2020-10-24 02:14:58,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 772 [2020-10-24 02:14:58,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:14:58,179 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:14:58,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-24 02:14:58,179 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:14:58,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:14:58,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1416845281, now seen corresponding path program 1 times [2020-10-24 02:14:58,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:14:58,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [799268185] [2020-10-24 02:14:58,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:14:58,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:14:58,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:14:58,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:14:58,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-24 02:14:58,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:14:58,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-10-24 02:14:58,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:14:58,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-10-24 02:14:58,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:14:58,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 440 [2020-10-24 02:14:58,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:14:58,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 629 [2020-10-24 02:14:58,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:14:59,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 230 proven. 98 refuted. 0 times theorem prover too weak. 1040 trivial. 0 not checked. [2020-10-24 02:14:59,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [799268185] [2020-10-24 02:14:59,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:14:59,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-24 02:14:59,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311004192] [2020-10-24 02:14:59,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-24 02:14:59,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:14:59,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-24 02:14:59,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-24 02:14:59,304 INFO L87 Difference]: Start difference. First operand 4977 states and 5204 transitions. Second operand 9 states. [2020-10-24 02:15:06,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:15:06,034 INFO L93 Difference]: Finished difference Result 10154 states and 10626 transitions. [2020-10-24 02:15:06,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-24 02:15:06,035 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 771 [2020-10-24 02:15:06,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:15:06,056 INFO L225 Difference]: With dead ends: 10154 [2020-10-24 02:15:06,056 INFO L226 Difference]: Without dead ends: 5180 [2020-10-24 02:15:06,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2020-10-24 02:15:06,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5180 states. [2020-10-24 02:15:07,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5180 to 5151. [2020-10-24 02:15:07,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5151 states. [2020-10-24 02:15:07,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5151 states to 5151 states and 5354 transitions. [2020-10-24 02:15:07,383 INFO L78 Accepts]: Start accepts. Automaton has 5151 states and 5354 transitions. Word has length 771 [2020-10-24 02:15:07,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:15:07,383 INFO L481 AbstractCegarLoop]: Abstraction has 5151 states and 5354 transitions. [2020-10-24 02:15:07,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-24 02:15:07,384 INFO L276 IsEmpty]: Start isEmpty. Operand 5151 states and 5354 transitions. [2020-10-24 02:15:07,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 841 [2020-10-24 02:15:07,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:15:07,392 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:15:07,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-24 02:15:07,393 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:15:07,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:15:07,394 INFO L82 PathProgramCache]: Analyzing trace with hash -257759105, now seen corresponding path program 1 times [2020-10-24 02:15:07,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:15:07,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435552195] [2020-10-24 02:15:07,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:15:07,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:15:07,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:15:07,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:15:07,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-24 02:15:07,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:15:07,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-10-24 02:15:07,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:15:07,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-10-24 02:15:07,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:15:07,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 440 [2020-10-24 02:15:07,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:15:07,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 629 [2020-10-24 02:15:07,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:15:07,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 716 [2020-10-24 02:15:07,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:15:08,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1760 backedges. 668 proven. 99 refuted. 0 times theorem prover too weak. 993 trivial. 0 not checked. [2020-10-24 02:15:08,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [435552195] [2020-10-24 02:15:08,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:15:08,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-24 02:15:08,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172643366] [2020-10-24 02:15:08,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-24 02:15:08,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:15:08,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-24 02:15:08,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-24 02:15:08,551 INFO L87 Difference]: Start difference. First operand 5151 states and 5354 transitions. Second operand 12 states. [2020-10-24 02:15:11,944 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2020-10-24 02:15:13,561 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2020-10-24 02:15:15,640 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-10-24 02:15:17,548 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2020-10-24 02:15:20,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:15:20,030 INFO L93 Difference]: Finished difference Result 10484 states and 10903 transitions. [2020-10-24 02:15:20,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-24 02:15:20,031 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 840 [2020-10-24 02:15:20,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:15:20,049 INFO L225 Difference]: With dead ends: 10484 [2020-10-24 02:15:20,049 INFO L226 Difference]: Without dead ends: 5147 [2020-10-24 02:15:20,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=311, Invalid=1095, Unknown=0, NotChecked=0, Total=1406 [2020-10-24 02:15:20,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5147 states. [2020-10-24 02:15:21,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5147 to 4951. [2020-10-24 02:15:21,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4951 states. [2020-10-24 02:15:21,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4951 states to 4951 states and 5104 transitions. [2020-10-24 02:15:21,220 INFO L78 Accepts]: Start accepts. Automaton has 4951 states and 5104 transitions. Word has length 840 [2020-10-24 02:15:21,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:15:21,221 INFO L481 AbstractCegarLoop]: Abstraction has 4951 states and 5104 transitions. [2020-10-24 02:15:21,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-24 02:15:21,221 INFO L276 IsEmpty]: Start isEmpty. Operand 4951 states and 5104 transitions. [2020-10-24 02:15:21,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 890 [2020-10-24 02:15:21,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:15:21,228 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:15:21,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-24 02:15:21,229 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:15:21,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:15:21,229 INFO L82 PathProgramCache]: Analyzing trace with hash 999109453, now seen corresponding path program 1 times [2020-10-24 02:15:21,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:15:21,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1313097343] [2020-10-24 02:15:21,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:15:21,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:15:21,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:15:21,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:15:21,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-24 02:15:21,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:15:21,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-10-24 02:15:21,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:15:21,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-10-24 02:15:21,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:15:21,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 440 [2020-10-24 02:15:21,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:15:21,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 629 [2020-10-24 02:15:21,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:15:21,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 765 [2020-10-24 02:15:21,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:15:22,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1924 backedges. 660 proven. 599 refuted. 0 times theorem prover too weak. 665 trivial. 0 not checked. [2020-10-24 02:15:22,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1313097343] [2020-10-24 02:15:22,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:15:22,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-24 02:15:22,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192166936] [2020-10-24 02:15:22,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-24 02:15:22,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:15:22,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-24 02:15:22,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-24 02:15:22,573 INFO L87 Difference]: Start difference. First operand 4951 states and 5104 transitions. Second operand 9 states. [2020-10-24 02:15:26,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:15:26,635 INFO L93 Difference]: Finished difference Result 11066 states and 11410 transitions. [2020-10-24 02:15:26,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-24 02:15:26,637 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 889 [2020-10-24 02:15:26,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:15:26,659 INFO L225 Difference]: With dead ends: 11066 [2020-10-24 02:15:26,659 INFO L226 Difference]: Without dead ends: 6327 [2020-10-24 02:15:26,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-24 02:15:26,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6327 states. [2020-10-24 02:15:27,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6327 to 5927. [2020-10-24 02:15:27,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5927 states. [2020-10-24 02:15:27,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5927 states to 5927 states and 6109 transitions. [2020-10-24 02:15:27,952 INFO L78 Accepts]: Start accepts. Automaton has 5927 states and 6109 transitions. Word has length 889 [2020-10-24 02:15:27,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:15:27,953 INFO L481 AbstractCegarLoop]: Abstraction has 5927 states and 6109 transitions. [2020-10-24 02:15:27,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-24 02:15:27,953 INFO L276 IsEmpty]: Start isEmpty. Operand 5927 states and 6109 transitions. [2020-10-24 02:15:27,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 901 [2020-10-24 02:15:27,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:15:27,963 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:15:27,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-24 02:15:27,963 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:15:27,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:15:27,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1338029140, now seen corresponding path program 1 times [2020-10-24 02:15:27,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:15:27,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [996917625] [2020-10-24 02:15:27,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:15:28,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:15:28,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:15:28,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:15:28,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-24 02:15:28,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:15:28,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-10-24 02:15:28,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:15:28,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2020-10-24 02:15:28,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:15:28,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 451 [2020-10-24 02:15:28,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:15:28,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 640 [2020-10-24 02:15:28,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:15:28,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 776 [2020-10-24 02:15:28,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:15:29,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1921 backedges. 561 proven. 379 refuted. 0 times theorem prover too weak. 981 trivial. 0 not checked. [2020-10-24 02:15:29,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [996917625] [2020-10-24 02:15:29,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:15:29,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-24 02:15:29,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239462124] [2020-10-24 02:15:29,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-24 02:15:29,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:15:29,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-24 02:15:29,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-24 02:15:29,622 INFO L87 Difference]: Start difference. First operand 5927 states and 6109 transitions. Second operand 11 states. [2020-10-24 02:15:30,376 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 78 [2020-10-24 02:15:30,685 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 77 [2020-10-24 02:15:30,854 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2020-10-24 02:15:32,490 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2020-10-24 02:15:32,686 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-10-24 02:15:36,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:15:36,340 INFO L93 Difference]: Finished difference Result 12138 states and 12644 transitions. [2020-10-24 02:15:36,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-24 02:15:36,341 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 900 [2020-10-24 02:15:36,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:15:36,376 INFO L225 Difference]: With dead ends: 12138 [2020-10-24 02:15:36,376 INFO L226 Difference]: Without dead ends: 6423 [2020-10-24 02:15:36,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2020-10-24 02:15:36,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6423 states. [2020-10-24 02:15:37,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6423 to 5927. [2020-10-24 02:15:37,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5927 states. [2020-10-24 02:15:37,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5927 states to 5927 states and 6109 transitions. [2020-10-24 02:15:37,561 INFO L78 Accepts]: Start accepts. Automaton has 5927 states and 6109 transitions. Word has length 900 [2020-10-24 02:15:37,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:15:37,561 INFO L481 AbstractCegarLoop]: Abstraction has 5927 states and 6109 transitions. [2020-10-24 02:15:37,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-24 02:15:37,561 INFO L276 IsEmpty]: Start isEmpty. Operand 5927 states and 6109 transitions. [2020-10-24 02:15:37,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 997 [2020-10-24 02:15:37,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:15:37,570 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:15:37,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-24 02:15:37,570 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:15:37,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:15:37,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1009013707, now seen corresponding path program 1 times [2020-10-24 02:15:37,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:15:37,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [578763455] [2020-10-24 02:15:37,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:15:37,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:15:37,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:15:37,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:15:37,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-24 02:15:37,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:15:37,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-10-24 02:15:37,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:15:37,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-10-24 02:15:37,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:15:37,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 361 [2020-10-24 02:15:38,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:15:38,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 547 [2020-10-24 02:15:38,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:15:38,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 736 [2020-10-24 02:15:38,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:15:38,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 872 [2020-10-24 02:15:38,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:15:38,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 905 proven. 197 refuted. 0 times theorem prover too weak. 1399 trivial. 0 not checked. [2020-10-24 02:15:38,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [578763455] [2020-10-24 02:15:38,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:15:38,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-24 02:15:38,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858872023] [2020-10-24 02:15:38,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-24 02:15:38,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:15:38,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-24 02:15:38,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-24 02:15:38,765 INFO L87 Difference]: Start difference. First operand 5927 states and 6109 transitions. Second operand 7 states. [2020-10-24 02:15:42,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:15:42,029 INFO L93 Difference]: Finished difference Result 11850 states and 12213 transitions. [2020-10-24 02:15:42,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-24 02:15:42,029 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 996 [2020-10-24 02:15:42,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:15:42,048 INFO L225 Difference]: With dead ends: 11850 [2020-10-24 02:15:42,048 INFO L226 Difference]: Without dead ends: 6135 [2020-10-24 02:15:42,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-24 02:15:42,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6135 states. [2020-10-24 02:15:43,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6135 to 5927. [2020-10-24 02:15:43,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5927 states. [2020-10-24 02:15:43,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5927 states to 5927 states and 6107 transitions. [2020-10-24 02:15:43,342 INFO L78 Accepts]: Start accepts. Automaton has 5927 states and 6107 transitions. Word has length 996 [2020-10-24 02:15:43,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:15:43,342 INFO L481 AbstractCegarLoop]: Abstraction has 5927 states and 6107 transitions. [2020-10-24 02:15:43,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-24 02:15:43,343 INFO L276 IsEmpty]: Start isEmpty. Operand 5927 states and 6107 transitions. [2020-10-24 02:15:43,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1072 [2020-10-24 02:15:43,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:15:43,351 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:15:43,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-24 02:15:43,351 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:15:43,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:15:43,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1759008184, now seen corresponding path program 1 times [2020-10-24 02:15:43,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:15:43,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [127479231] [2020-10-24 02:15:43,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:15:43,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:15:43,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:15:43,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:15:43,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-24 02:15:43,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:15:43,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-10-24 02:15:43,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:15:43,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-10-24 02:15:43,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:15:43,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 440 [2020-10-24 02:15:43,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:15:43,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 622 [2020-10-24 02:15:43,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:15:44,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 811 [2020-10-24 02:15:44,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:15:44,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 947 [2020-10-24 02:15:44,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:15:44,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2763 backedges. 958 proven. 283 refuted. 0 times theorem prover too weak. 1522 trivial. 0 not checked. [2020-10-24 02:15:44,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [127479231] [2020-10-24 02:15:44,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:15:44,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-24 02:15:44,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934394321] [2020-10-24 02:15:44,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-24 02:15:44,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:15:44,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-24 02:15:44,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-10-24 02:15:44,782 INFO L87 Difference]: Start difference. First operand 5927 states and 6107 transitions. Second operand 12 states. [2020-10-24 02:15:45,945 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-24 02:15:48,501 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-24 02:15:55,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:15:55,438 INFO L93 Difference]: Finished difference Result 12237 states and 12605 transitions. [2020-10-24 02:15:55,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-24 02:15:55,439 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 1071 [2020-10-24 02:15:55,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:15:55,459 INFO L225 Difference]: With dead ends: 12237 [2020-10-24 02:15:55,459 INFO L226 Difference]: Without dead ends: 4724 [2020-10-24 02:15:55,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=369, Invalid=1437, Unknown=0, NotChecked=0, Total=1806 [2020-10-24 02:15:55,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4724 states. [2020-10-24 02:15:56,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4724 to 4516. [2020-10-24 02:15:56,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4516 states. [2020-10-24 02:15:56,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4516 states to 4516 states and 4606 transitions. [2020-10-24 02:15:56,723 INFO L78 Accepts]: Start accepts. Automaton has 4516 states and 4606 transitions. Word has length 1071 [2020-10-24 02:15:56,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:15:56,724 INFO L481 AbstractCegarLoop]: Abstraction has 4516 states and 4606 transitions. [2020-10-24 02:15:56,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-24 02:15:56,724 INFO L276 IsEmpty]: Start isEmpty. Operand 4516 states and 4606 transitions. [2020-10-24 02:15:56,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1082 [2020-10-24 02:15:56,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:15:56,735 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:15:56,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-24 02:15:56,736 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:15:56,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:15:56,736 INFO L82 PathProgramCache]: Analyzing trace with hash 2040957710, now seen corresponding path program 1 times [2020-10-24 02:15:56,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:15:56,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [73546668] [2020-10-24 02:15:56,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:15:56,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:15:57,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:15:57,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:15:57,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-24 02:15:57,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:15:57,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-10-24 02:15:57,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:15:57,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-10-24 02:15:57,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:15:57,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 361 [2020-10-24 02:15:57,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:15:57,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 547 [2020-10-24 02:15:57,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:15:57,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 632 [2020-10-24 02:15:57,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:15:57,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 821 [2020-10-24 02:15:57,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:15:57,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 957 [2020-10-24 02:15:57,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:15:58,429 INFO L134 CoverageAnalysis]: Checked inductivity of 3117 backedges. 797 proven. 322 refuted. 0 times theorem prover too weak. 1998 trivial. 0 not checked. [2020-10-24 02:15:58,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [73546668] [2020-10-24 02:15:58,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:15:58,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-24 02:15:58,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979299587] [2020-10-24 02:15:58,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-24 02:15:58,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:15:58,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-24 02:15:58,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-24 02:15:58,486 INFO L87 Difference]: Start difference. First operand 4516 states and 4606 transitions. Second operand 15 states. [2020-10-24 02:16:00,193 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-24 02:16:05,907 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2020-10-24 02:16:06,801 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2020-10-24 02:16:09,954 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2020-10-24 02:16:15,027 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2020-10-24 02:16:18,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:16:18,450 INFO L93 Difference]: Finished difference Result 7640 states and 7794 transitions. [2020-10-24 02:16:18,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-24 02:16:18,451 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 1081 [2020-10-24 02:16:18,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:16:18,463 INFO L225 Difference]: With dead ends: 7640 [2020-10-24 02:16:18,463 INFO L226 Difference]: Without dead ends: 3740 [2020-10-24 02:16:18,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1531 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=818, Invalid=4012, Unknown=0, NotChecked=0, Total=4830 [2020-10-24 02:16:18,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3740 states. [2020-10-24 02:16:19,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3740 to 3546. [2020-10-24 02:16:19,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3546 states. [2020-10-24 02:16:19,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3546 states to 3546 states and 3605 transitions. [2020-10-24 02:16:19,187 INFO L78 Accepts]: Start accepts. Automaton has 3546 states and 3605 transitions. Word has length 1081 [2020-10-24 02:16:19,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:16:19,188 INFO L481 AbstractCegarLoop]: Abstraction has 3546 states and 3605 transitions. [2020-10-24 02:16:19,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-24 02:16:19,188 INFO L276 IsEmpty]: Start isEmpty. Operand 3546 states and 3605 transitions. [2020-10-24 02:16:19,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1240 [2020-10-24 02:16:19,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:16:19,199 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2020-10-24 02:16:19,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-24 02:16:19,200 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:16:19,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:16:19,200 INFO L82 PathProgramCache]: Analyzing trace with hash -130991602, now seen corresponding path program 1 times [2020-10-24 02:16:19,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:16:19,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [159018106] [2020-10-24 02:16:19,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:16:19,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:16:19,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:16:19,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:16:19,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-24 02:16:19,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:16:19,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-10-24 02:16:19,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:16:19,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-10-24 02:16:19,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:16:19,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 361 [2020-10-24 02:16:19,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:16:19,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 547 [2020-10-24 02:16:19,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:16:19,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 632 [2020-10-24 02:16:19,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:16:19,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 821 [2020-10-24 02:16:20,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:16:20,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1011 [2020-10-24 02:16:20,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:16:21,025 INFO L134 CoverageAnalysis]: Checked inductivity of 3617 backedges. 1773 proven. 441 refuted. 0 times theorem prover too weak. 1403 trivial. 0 not checked. [2020-10-24 02:16:21,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [159018106] [2020-10-24 02:16:21,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:16:21,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-24 02:16:21,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076033519] [2020-10-24 02:16:21,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-24 02:16:21,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:16:21,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-24 02:16:21,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-24 02:16:21,027 INFO L87 Difference]: Start difference. First operand 3546 states and 3605 transitions. Second operand 12 states. [2020-10-24 02:16:21,295 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2020-10-24 02:16:22,957 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-10-24 02:16:23,327 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2020-10-24 02:16:24,167 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2020-10-24 02:16:24,372 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2020-10-24 02:16:25,415 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-10-24 02:16:25,674 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2020-10-24 02:16:27,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:16:27,359 INFO L93 Difference]: Finished difference Result 5497 states and 5588 transitions. [2020-10-24 02:16:27,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-24 02:16:27,360 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 1239 [2020-10-24 02:16:27,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:16:27,369 INFO L225 Difference]: With dead ends: 5497 [2020-10-24 02:16:27,370 INFO L226 Difference]: Without dead ends: 3939 [2020-10-24 02:16:27,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=162, Invalid=438, Unknown=0, NotChecked=0, Total=600 [2020-10-24 02:16:27,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3939 states. [2020-10-24 02:16:28,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3939 to 3739. [2020-10-24 02:16:28,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3739 states. [2020-10-24 02:16:28,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3739 states to 3739 states and 3799 transitions. [2020-10-24 02:16:28,183 INFO L78 Accepts]: Start accepts. Automaton has 3739 states and 3799 transitions. Word has length 1239 [2020-10-24 02:16:28,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:16:28,184 INFO L481 AbstractCegarLoop]: Abstraction has 3739 states and 3799 transitions. [2020-10-24 02:16:28,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-24 02:16:28,184 INFO L276 IsEmpty]: Start isEmpty. Operand 3739 states and 3799 transitions. [2020-10-24 02:16:28,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1515 [2020-10-24 02:16:28,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:16:28,198 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2020-10-24 02:16:28,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-24 02:16:28,198 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:16:28,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:16:28,199 INFO L82 PathProgramCache]: Analyzing trace with hash 701375638, now seen corresponding path program 1 times [2020-10-24 02:16:28,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:16:28,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1594850938] [2020-10-24 02:16:28,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:16:28,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:16:28,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:16:28,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:16:28,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-24 02:16:28,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:16:28,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-10-24 02:16:28,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:16:28,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-10-24 02:16:28,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:16:28,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 361 [2020-10-24 02:16:28,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:16:28,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 547 [2020-10-24 02:16:28,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:16:28,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 632 [2020-10-24 02:16:28,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:16:28,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 821 [2020-10-24 02:16:28,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:16:28,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 947 [2020-10-24 02:16:28,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:16:28,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1096 [2020-10-24 02:16:28,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:16:28,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1286 [2020-10-24 02:16:28,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:16:30,317 INFO L134 CoverageAnalysis]: Checked inductivity of 5723 backedges. 2442 proven. 108 refuted. 0 times theorem prover too weak. 3173 trivial. 0 not checked. [2020-10-24 02:16:30,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1594850938] [2020-10-24 02:16:30,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:16:30,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-24 02:16:30,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735448061] [2020-10-24 02:16:30,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-24 02:16:30,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:16:30,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-24 02:16:30,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-24 02:16:30,319 INFO L87 Difference]: Start difference. First operand 3739 states and 3799 transitions. Second operand 9 states. [2020-10-24 02:16:33,178 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2020-10-24 02:16:34,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:16:34,772 INFO L93 Difference]: Finished difference Result 8037 states and 8174 transitions. [2020-10-24 02:16:34,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-24 02:16:34,773 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1514 [2020-10-24 02:16:34,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:16:34,786 INFO L225 Difference]: With dead ends: 8037 [2020-10-24 02:16:34,787 INFO L226 Difference]: Without dead ends: 3931 [2020-10-24 02:16:34,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-10-24 02:16:34,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3931 states. [2020-10-24 02:16:35,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3931 to 3728. [2020-10-24 02:16:35,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3728 states. [2020-10-24 02:16:35,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3728 states to 3728 states and 3780 transitions. [2020-10-24 02:16:35,644 INFO L78 Accepts]: Start accepts. Automaton has 3728 states and 3780 transitions. Word has length 1514 [2020-10-24 02:16:35,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:16:35,645 INFO L481 AbstractCegarLoop]: Abstraction has 3728 states and 3780 transitions. [2020-10-24 02:16:35,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-24 02:16:35,646 INFO L276 IsEmpty]: Start isEmpty. Operand 3728 states and 3780 transitions. [2020-10-24 02:16:35,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1827 [2020-10-24 02:16:35,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:16:35,664 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:16:35,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-24 02:16:35,664 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:16:35,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:16:35,665 INFO L82 PathProgramCache]: Analyzing trace with hash -610049466, now seen corresponding path program 1 times [2020-10-24 02:16:35,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:16:35,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418172442] [2020-10-24 02:16:35,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:16:35,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:16:36,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:16:36,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:16:36,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-24 02:16:36,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:16:36,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-10-24 02:16:36,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:16:36,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-10-24 02:16:36,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:16:36,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 361 [2020-10-24 02:16:36,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:16:36,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 547 [2020-10-24 02:16:36,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:16:36,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 632 [2020-10-24 02:16:36,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:16:36,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 821 [2020-10-24 02:16:36,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:16:36,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 947 [2020-10-24 02:16:36,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:16:36,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1096 [2020-10-24 02:16:36,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:16:36,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1286 [2020-10-24 02:16:36,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:16:36,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1408 [2020-10-24 02:16:36,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:16:36,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1598 [2020-10-24 02:16:36,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:16:38,309 INFO L134 CoverageAnalysis]: Checked inductivity of 8466 backedges. 3622 proven. 470 refuted. 0 times theorem prover too weak. 4374 trivial. 0 not checked. [2020-10-24 02:16:38,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418172442] [2020-10-24 02:16:38,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:16:38,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-24 02:16:38,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132357994] [2020-10-24 02:16:38,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-24 02:16:38,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:16:38,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-24 02:16:38,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-24 02:16:38,311 INFO L87 Difference]: Start difference. First operand 3728 states and 3780 transitions. Second operand 9 states. [2020-10-24 02:16:43,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:16:43,556 INFO L93 Difference]: Finished difference Result 6054 states and 6140 transitions. [2020-10-24 02:16:43,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-24 02:16:43,557 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1826 [2020-10-24 02:16:43,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:16:43,561 INFO L225 Difference]: With dead ends: 6054 [2020-10-24 02:16:43,561 INFO L226 Difference]: Without dead ends: 0 [2020-10-24 02:16:43,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2020-10-24 02:16:43,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-24 02:16:43,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-24 02:16:43,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-24 02:16:43,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-24 02:16:43,572 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1826 [2020-10-24 02:16:43,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:16:43,572 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-24 02:16:43,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-24 02:16:43,572 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-24 02:16:43,573 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-24 02:16:43,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-24 02:16:43,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-24 02:16:44,760 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-10-24 02:17:22,845 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 158 [2020-10-24 02:17:23,051 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 155 [2020-10-24 02:17:23,269 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 158 [2020-10-24 02:17:23,494 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 158 [2020-10-24 02:17:23,704 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 158 [2020-10-24 02:17:23,912 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 158 [2020-10-24 02:17:24,120 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 158 [2020-10-24 02:17:24,347 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 158 [2020-10-24 02:17:24,584 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 158 [2020-10-24 02:17:24,798 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 158 [2020-10-24 02:17:25,005 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 158 [2020-10-24 02:17:25,223 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 158 [2020-10-24 02:17:25,461 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 158 [2020-10-24 02:17:25,694 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 158 [2020-10-24 02:17:25,902 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 158 [2020-10-24 02:17:26,125 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 158 [2020-10-24 02:17:26,329 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 158 [2020-10-24 02:17:26,536 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 158 [2020-10-24 02:17:26,773 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 158 [2020-10-24 02:17:26,972 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 158 [2020-10-24 02:17:37,323 WARN L193 SmtUtils]: Spent 981.00 ms on a formula simplification. DAG size of input: 590 DAG size of output: 497 [2020-10-24 02:18:11,320 WARN L193 SmtUtils]: Spent 985.00 ms on a formula simplification. DAG size of input: 590 DAG size of output: 497 [2020-10-24 02:18:14,314 WARN L193 SmtUtils]: Spent 964.00 ms on a formula simplification. DAG size of input: 590 DAG size of output: 497 [2020-10-24 02:18:17,763 WARN L193 SmtUtils]: Spent 977.00 ms on a formula simplification. DAG size of input: 590 DAG size of output: 497 [2020-10-24 02:20:03,550 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 590 DAG size of output: 497 [2020-10-24 02:20:11,486 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 143 [2020-10-24 02:21:43,685 WARN L193 SmtUtils]: Spent 974.00 ms on a formula simplification. DAG size of input: 590 DAG size of output: 497 [2020-10-24 02:21:47,671 WARN L193 SmtUtils]: Spent 988.00 ms on a formula simplification. DAG size of input: 586 DAG size of output: 491 [2020-10-24 02:21:49,959 WARN L193 SmtUtils]: Spent 977.00 ms on a formula simplification. DAG size of input: 586 DAG size of output: 491 [2020-10-24 02:21:51,301 WARN L193 SmtUtils]: Spent 998.00 ms on a formula simplification. DAG size of input: 586 DAG size of output: 491 [2020-10-24 02:23:09,630 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 200 [2020-10-24 02:23:10,002 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 214 [2020-10-24 02:23:10,161 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 192 [2020-10-24 02:23:10,583 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 222 [2020-10-24 02:23:10,746 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 236 [2020-10-24 02:23:11,794 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 224 [2020-10-24 02:23:12,546 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 220 [2020-10-24 02:23:12,699 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 214 [2020-10-24 02:23:14,055 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 216 [2020-10-24 02:23:15,576 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 253 DAG size of output: 236 [2020-10-24 02:23:15,761 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 222 [2020-10-24 02:23:16,212 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 192 [2020-10-24 02:23:17,031 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 214 [2020-10-24 02:23:18,246 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 214 [2020-10-24 02:23:19,678 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 200 [2020-10-24 02:23:20,059 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 214 [2020-10-24 02:23:20,222 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 192 [2020-10-24 02:23:20,626 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 222 [2020-10-24 02:23:20,804 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 236 [2020-10-24 02:23:21,854 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 224 [2020-10-24 02:23:22,573 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 220 [2020-10-24 02:23:22,735 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 214 [2020-10-24 02:23:24,065 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 216 [2020-10-24 02:23:25,600 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 253 DAG size of output: 236 [2020-10-24 02:23:25,791 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 222 [2020-10-24 02:23:26,241 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 192 [2020-10-24 02:23:27,067 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 214 [2020-10-24 02:23:28,313 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 214 [2020-10-24 02:24:18,391 WARN L193 SmtUtils]: Spent 991.00 ms on a formula simplification. DAG size of input: 590 DAG size of output: 497 [2020-10-24 02:26:16,898 WARN L193 SmtUtils]: Spent 1.95 s on a formula simplification. DAG size of input: 243 DAG size of output: 127 [2020-10-24 02:26:18,973 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 298 DAG size of output: 133 [2020-10-24 02:26:21,563 WARN L193 SmtUtils]: Spent 2.57 s on a formula simplification. DAG size of input: 250 DAG size of output: 129