/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loops/compact.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 23:01:36,417 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 23:01:36,420 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 23:01:36,458 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 23:01:36,519 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 23:01:36,520 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 23:01:36,521 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 23:01:36,525 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-02 23:01:36,563 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 23:01:36,564 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 23:01:36,567 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 23:01:36,567 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 23:01:36,567 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 23:01:36,567 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 23:01:36,568 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 23:01:36,568 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 23:01:36,568 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 23:01:36,568 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 23:01:36,569 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 23:01:36,569 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 23:01:36,569 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 23:01:36,569 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 23:01:36,570 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 23:01:36,570 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 23:01:36,570 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 23:01:36,570 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 23:01:36,570 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 23:01:36,570 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 23:01:36,571 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-02 23:01:36,571 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 23:01:36,571 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-02 23:01:36,571 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 23:01:36,894 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 23:01:36,916 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 23:01:36,918 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 23:01:36,919 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 23:01:36,920 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 23:01:36,921 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/compact.c [2021-05-02 23:01:36,983 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1a61a952/974e1c0ace5b4e1c8e0ad66e9e9977a5/FLAGa69940b68 [2021-05-02 23:01:37,360 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 23:01:37,360 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/compact.c [2021-05-02 23:01:37,366 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1a61a952/974e1c0ace5b4e1c8e0ad66e9e9977a5/FLAGa69940b68 [2021-05-02 23:01:37,756 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1a61a952/974e1c0ace5b4e1c8e0ad66e9e9977a5 [2021-05-02 23:01:37,758 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 23:01:37,759 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 23:01:37,761 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 23:01:37,761 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 23:01:37,763 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 23:01:37,764 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:01:37" (1/1) ... [2021-05-02 23:01:37,769 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e9ecf85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:37, skipping insertion in model container [2021-05-02 23:01:37,769 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:01:37" (1/1) ... [2021-05-02 23:01:37,775 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 23:01:37,787 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 23:01:37,890 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/compact.c[609,622] [2021-05-02 23:01:37,893 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:01:37,906 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 23:01:37,918 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/compact.c[609,622] [2021-05-02 23:01:37,919 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:01:37,931 INFO L208 MainTranslator]: Completed translation [2021-05-02 23:01:37,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:37 WrapperNode [2021-05-02 23:01:37,931 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 23:01:37,932 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 23:01:37,933 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 23:01:37,933 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 23:01:37,964 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:37" (1/1) ... [2021-05-02 23:01:37,964 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:37" (1/1) ... [2021-05-02 23:01:37,988 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:37" (1/1) ... [2021-05-02 23:01:37,988 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:37" (1/1) ... [2021-05-02 23:01:37,993 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:37" (1/1) ... [2021-05-02 23:01:38,003 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:37" (1/1) ... [2021-05-02 23:01:38,006 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:37" (1/1) ... [2021-05-02 23:01:38,012 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 23:01:38,013 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 23:01:38,013 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 23:01:38,014 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 23:01:38,014 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:37" (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 [2021-05-02 23:01:38,098 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 23:01:38,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 23:01:38,099 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 23:01:38,099 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 23:01:38,100 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 23:01:38,100 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 23:01:38,100 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 23:01:38,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 23:01:38,100 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-05-02 23:01:38,101 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 23:01:38,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 23:01:38,101 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 23:01:38,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 23:01:38,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 23:01:38,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 23:01:38,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 23:01:38,402 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 23:01:38,402 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 23:01:38,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:01:38 BoogieIcfgContainer [2021-05-02 23:01:38,404 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 23:01:38,405 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 23:01:38,405 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 23:01:38,408 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 23:01:38,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 11:01:37" (1/3) ... [2021-05-02 23:01:38,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c96a979 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:01:38, skipping insertion in model container [2021-05-02 23:01:38,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:37" (2/3) ... [2021-05-02 23:01:38,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c96a979 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:01:38, skipping insertion in model container [2021-05-02 23:01:38,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:01:38" (3/3) ... [2021-05-02 23:01:38,410 INFO L111 eAbstractionObserver]: Analyzing ICFG compact.c [2021-05-02 23:01:38,414 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-02 23:01:38,417 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 23:01:38,431 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 23:01:38,449 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 23:01:38,449 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 23:01:38,449 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-02 23:01:38,449 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 23:01:38,449 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 23:01:38,449 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 23:01:38,450 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 23:01:38,450 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 23:01:38,462 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:01:38,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-05-02 23:01:38,468 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:38,469 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:38,469 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:38,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:38,473 INFO L82 PathProgramCache]: Analyzing trace with hash 927625408, now seen corresponding path program 1 times [2021-05-02 23:01:38,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:38,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393922596] [2021-05-02 23:01:38,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:38,529 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:38,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:38,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:38,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:38,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:01:38,686 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:38,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1393922596] [2021-05-02 23:01:38,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1393922596] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:38,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:38,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 23:01:38,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363591513] [2021-05-02 23:01:38,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 23:01:38,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:38,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 23:01:38,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:01:38,705 INFO L87 Difference]: Start difference. First operand has 18 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:38,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:38,828 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2021-05-02 23:01:38,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 23:01:38,830 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-05-02 23:01:38,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:38,836 INFO L225 Difference]: With dead ends: 37 [2021-05-02 23:01:38,837 INFO L226 Difference]: Without dead ends: 21 [2021-05-02 23:01:38,839 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:01:38,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-05-02 23:01:38,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 14. [2021-05-02 23:01:38,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:38,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-05-02 23:01:38,872 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2021-05-02 23:01:38,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:38,873 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-05-02 23:01:38,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:38,874 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-05-02 23:01:38,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-05-02 23:01:38,875 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:38,875 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:38,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 23:01:38,875 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:38,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:38,877 INFO L82 PathProgramCache]: Analyzing trace with hash 927446352, now seen corresponding path program 1 times [2021-05-02 23:01:38,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:38,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [298549935] [2021-05-02 23:01:38,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:38,884 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:38,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:39,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:39,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:39,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:01:39,090 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:39,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [298549935] [2021-05-02 23:01:39,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [298549935] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:39,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:39,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 23:01:39,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607156281] [2021-05-02 23:01:39,092 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 23:01:39,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:39,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 23:01:39,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 23:01:39,093 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:39,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:39,219 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-05-02 23:01:39,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 23:01:39,220 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-05-02 23:01:39,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:39,221 INFO L225 Difference]: With dead ends: 25 [2021-05-02 23:01:39,221 INFO L226 Difference]: Without dead ends: 19 [2021-05-02 23:01:39,222 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 141.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 23:01:39,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-02 23:01:39,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2021-05-02 23:01:39,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:39,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-05-02 23:01:39,234 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 10 [2021-05-02 23:01:39,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:39,235 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-05-02 23:01:39,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:39,235 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-05-02 23:01:39,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 23:01:39,235 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:39,236 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:39,236 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 23:01:39,236 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:39,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:39,237 INFO L82 PathProgramCache]: Analyzing trace with hash 706936613, now seen corresponding path program 1 times [2021-05-02 23:01:39,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:39,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1377537144] [2021-05-02 23:01:39,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:39,257 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:39,259 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:39,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:39,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:39,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:39,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:01:39,440 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:39,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1377537144] [2021-05-02 23:01:39,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1377537144] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:39,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:39,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 23:01:39,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049289622] [2021-05-02 23:01:39,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 23:01:39,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:39,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 23:01:39,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 23:01:39,442 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:39,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:39,527 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2021-05-02 23:01:39,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 23:01:39,527 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-02 23:01:39,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:39,528 INFO L225 Difference]: With dead ends: 31 [2021-05-02 23:01:39,528 INFO L226 Difference]: Without dead ends: 24 [2021-05-02 23:01:39,529 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 110.0ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-02 23:01:39,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-02 23:01:39,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2021-05-02 23:01:39,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:39,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-05-02 23:01:39,534 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 15 [2021-05-02 23:01:39,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:39,534 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-05-02 23:01:39,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:39,535 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-05-02 23:01:39,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 23:01:39,535 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:39,535 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:39,535 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 23:01:39,536 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:39,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:39,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1962996172, now seen corresponding path program 2 times [2021-05-02 23:01:39,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:39,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1015527271] [2021-05-02 23:01:39,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:39,543 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:39,545 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:39,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:39,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:39,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:39,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:01:39,694 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:39,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1015527271] [2021-05-02 23:01:39,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1015527271] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:39,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:39,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 23:01:39,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955246978] [2021-05-02 23:01:39,696 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 23:01:39,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:39,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 23:01:39,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 23:01:39,697 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:39,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:39,837 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-05-02 23:01:39,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 23:01:39,838 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-05-02 23:01:39,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:39,838 INFO L225 Difference]: With dead ends: 39 [2021-05-02 23:01:39,838 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 23:01:39,840 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 106.3ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-02 23:01:39,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 23:01:39,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2021-05-02 23:01:39,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:39,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2021-05-02 23:01:39,854 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 20 [2021-05-02 23:01:39,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:39,856 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2021-05-02 23:01:39,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:39,856 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2021-05-02 23:01:39,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-02 23:01:39,857 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:39,857 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:39,857 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 23:01:39,858 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:39,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:39,858 INFO L82 PathProgramCache]: Analyzing trace with hash -436810175, now seen corresponding path program 3 times [2021-05-02 23:01:39,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:39,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [478566978] [2021-05-02 23:01:39,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:39,866 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:39,867 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:39,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:40,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:40,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:40,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:01:40,059 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:40,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [478566978] [2021-05-02 23:01:40,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [478566978] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:40,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:40,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 23:01:40,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482448182] [2021-05-02 23:01:40,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 23:01:40,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:40,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 23:01:40,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-02 23:01:40,062 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:40,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:40,192 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2021-05-02 23:01:40,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 23:01:40,193 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-05-02 23:01:40,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:40,194 INFO L225 Difference]: With dead ends: 47 [2021-05-02 23:01:40,194 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 23:01:40,195 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 104.9ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-02 23:01:40,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 23:01:40,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2021-05-02 23:01:40,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:40,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2021-05-02 23:01:40,206 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 25 [2021-05-02 23:01:40,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:40,206 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2021-05-02 23:01:40,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:40,207 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2021-05-02 23:01:40,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 23:01:40,208 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:40,208 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:40,208 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-02 23:01:40,208 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:40,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:40,209 INFO L82 PathProgramCache]: Analyzing trace with hash 329033496, now seen corresponding path program 4 times [2021-05-02 23:01:40,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:40,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1764823591] [2021-05-02 23:01:40,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:40,217 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:40,220 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:40,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:40,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:40,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:40,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:01:40,402 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:40,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1764823591] [2021-05-02 23:01:40,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1764823591] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:40,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:40,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 23:01:40,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139647753] [2021-05-02 23:01:40,403 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 23:01:40,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:40,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 23:01:40,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 23:01:40,404 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:40,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:40,572 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2021-05-02 23:01:40,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 23:01:40,573 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-05-02 23:01:40,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:40,575 INFO L225 Difference]: With dead ends: 55 [2021-05-02 23:01:40,575 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 23:01:40,576 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 115.1ms TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-02 23:01:40,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 23:01:40,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2021-05-02 23:01:40,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:40,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-05-02 23:01:40,585 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 30 [2021-05-02 23:01:40,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:40,585 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-05-02 23:01:40,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:40,586 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-05-02 23:01:40,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 23:01:40,587 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:40,587 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:40,587 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-02 23:01:40,587 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:40,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:40,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1926970717, now seen corresponding path program 5 times [2021-05-02 23:01:40,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:40,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309099657] [2021-05-02 23:01:40,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:40,595 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:40,597 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:40,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:40,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:40,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:40,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:01:40,764 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:40,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309099657] [2021-05-02 23:01:40,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1309099657] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:40,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:40,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 23:01:40,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133995558] [2021-05-02 23:01:40,766 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 23:01:40,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:40,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 23:01:40,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-02 23:01:40,767 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:40,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:40,957 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2021-05-02 23:01:40,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 23:01:40,958 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-05-02 23:01:40,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:40,958 INFO L225 Difference]: With dead ends: 63 [2021-05-02 23:01:40,958 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 23:01:40,959 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 145.0ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-02 23:01:40,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 23:01:40,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2021-05-02 23:01:40,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:40,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2021-05-02 23:01:40,964 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 35 [2021-05-02 23:01:40,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:40,964 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2021-05-02 23:01:40,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:40,964 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2021-05-02 23:01:40,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 23:01:40,965 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:40,965 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:40,965 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-02 23:01:40,965 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:40,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:40,966 INFO L82 PathProgramCache]: Analyzing trace with hash 261275644, now seen corresponding path program 6 times [2021-05-02 23:01:40,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:40,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276694228] [2021-05-02 23:01:40,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:40,971 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:40,972 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:40,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:41,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:41,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:41,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:01:41,159 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:41,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276694228] [2021-05-02 23:01:41,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1276694228] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:41,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:41,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-02 23:01:41,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806445253] [2021-05-02 23:01:41,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 23:01:41,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:41,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 23:01:41,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-02 23:01:41,161 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:41,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:41,344 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2021-05-02 23:01:41,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 23:01:41,345 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-05-02 23:01:41,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:41,346 INFO L225 Difference]: With dead ends: 71 [2021-05-02 23:01:41,346 INFO L226 Difference]: Without dead ends: 49 [2021-05-02 23:01:41,346 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 129.8ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-02 23:01:41,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-02 23:01:41,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2021-05-02 23:01:41,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 42 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:41,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2021-05-02 23:01:41,352 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 40 [2021-05-02 23:01:41,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:41,352 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2021-05-02 23:01:41,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:41,352 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2021-05-02 23:01:41,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 23:01:41,353 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:41,353 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:41,353 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-02 23:01:41,354 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:41,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:41,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1323430791, now seen corresponding path program 7 times [2021-05-02 23:01:41,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:41,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686861180] [2021-05-02 23:01:41,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:41,360 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:41,361 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:41,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:41,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:41,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:41,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:01:41,515 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:41,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686861180] [2021-05-02 23:01:41,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [686861180] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:41,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:41,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-02 23:01:41,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565685203] [2021-05-02 23:01:41,515 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 23:01:41,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:41,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 23:01:41,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 23:01:41,516 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:41,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:41,767 INFO L93 Difference]: Finished difference Result 79 states and 82 transitions. [2021-05-02 23:01:41,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 23:01:41,768 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-05-02 23:01:41,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:41,769 INFO L225 Difference]: With dead ends: 79 [2021-05-02 23:01:41,769 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 23:01:41,770 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 130.7ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 23:01:41,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 23:01:41,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2021-05-02 23:01:41,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:41,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2021-05-02 23:01:41,789 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 45 [2021-05-02 23:01:41,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:41,789 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2021-05-02 23:01:41,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:41,790 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2021-05-02 23:01:41,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 23:01:41,790 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:41,791 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:41,791 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-02 23:01:41,791 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:41,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:41,791 INFO L82 PathProgramCache]: Analyzing trace with hash 416520416, now seen corresponding path program 8 times [2021-05-02 23:01:41,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:41,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1751810135] [2021-05-02 23:01:41,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:41,805 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:41,807 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:41,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:42,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:42,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:42,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:01:42,027 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:42,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1751810135] [2021-05-02 23:01:42,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1751810135] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:42,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:42,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-02 23:01:42,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165497836] [2021-05-02 23:01:42,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 23:01:42,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:42,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 23:01:42,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-02 23:01:42,029 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:42,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:42,305 INFO L93 Difference]: Finished difference Result 87 states and 90 transitions. [2021-05-02 23:01:42,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 23:01:42,306 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-05-02 23:01:42,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:42,306 INFO L225 Difference]: With dead ends: 87 [2021-05-02 23:01:42,306 INFO L226 Difference]: Without dead ends: 59 [2021-05-02 23:01:42,309 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 142.1ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:01:42,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-02 23:01:42,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2021-05-02 23:01:42,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:42,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2021-05-02 23:01:42,316 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 50 [2021-05-02 23:01:42,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:42,316 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2021-05-02 23:01:42,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:42,316 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2021-05-02 23:01:42,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 23:01:42,317 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:42,317 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:42,317 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-02 23:01:42,317 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:42,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:42,318 INFO L82 PathProgramCache]: Analyzing trace with hash -208864363, now seen corresponding path program 9 times [2021-05-02 23:01:42,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:42,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1203814543] [2021-05-02 23:01:42,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:42,324 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:42,325 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:42,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:42,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:42,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:42,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:01:42,515 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:42,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1203814543] [2021-05-02 23:01:42,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1203814543] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:42,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:42,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-02 23:01:42,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516486708] [2021-05-02 23:01:42,515 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 23:01:42,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:42,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 23:01:42,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:01:42,516 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:42,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:42,800 INFO L93 Difference]: Finished difference Result 95 states and 98 transitions. [2021-05-02 23:01:42,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 23:01:42,800 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2021-05-02 23:01:42,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:42,801 INFO L225 Difference]: With dead ends: 95 [2021-05-02 23:01:42,801 INFO L226 Difference]: Without dead ends: 64 [2021-05-02 23:01:42,802 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 156.9ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-02 23:01:42,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-02 23:01:42,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2021-05-02 23:01:42,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 states have internal predecessors, (59), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:42,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2021-05-02 23:01:42,828 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 55 [2021-05-02 23:01:42,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:42,828 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2021-05-02 23:01:42,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:42,829 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2021-05-02 23:01:42,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-02 23:01:42,834 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:42,834 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:42,834 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-02 23:01:42,834 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:42,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:42,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1999539772, now seen corresponding path program 10 times [2021-05-02 23:01:42,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:42,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [141692638] [2021-05-02 23:01:42,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:42,841 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:42,843 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:42,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:43,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:43,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:43,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:01:43,044 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:43,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [141692638] [2021-05-02 23:01:43,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [141692638] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:43,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:43,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-02 23:01:43,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596328973] [2021-05-02 23:01:43,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 23:01:43,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:43,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 23:01:43,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-02 23:01:43,046 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:43,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:43,395 INFO L93 Difference]: Finished difference Result 103 states and 106 transitions. [2021-05-02 23:01:43,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 23:01:43,395 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2021-05-02 23:01:43,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:43,396 INFO L225 Difference]: With dead ends: 103 [2021-05-02 23:01:43,396 INFO L226 Difference]: Without dead ends: 69 [2021-05-02 23:01:43,398 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 168.8ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:01:43,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-02 23:01:43,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2021-05-02 23:01:43,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 62 states have (on average 1.032258064516129) internal successors, (64), 62 states have internal predecessors, (64), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:43,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2021-05-02 23:01:43,408 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 60 [2021-05-02 23:01:43,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:43,408 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2021-05-02 23:01:43,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:43,409 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2021-05-02 23:01:43,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-02 23:01:43,410 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:43,410 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:43,411 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-02 23:01:43,411 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:43,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:43,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1686779215, now seen corresponding path program 11 times [2021-05-02 23:01:43,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:43,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [999536307] [2021-05-02 23:01:43,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:43,419 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:43,421 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:43,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:43,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:43,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:43,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:01:43,676 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:43,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [999536307] [2021-05-02 23:01:43,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [999536307] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:43,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:43,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-05-02 23:01:43,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952411947] [2021-05-02 23:01:43,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 23:01:43,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:43,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 23:01:43,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:01:43,678 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:44,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:44,080 INFO L93 Difference]: Finished difference Result 111 states and 114 transitions. [2021-05-02 23:01:44,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 23:01:44,080 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2021-05-02 23:01:44,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:44,081 INFO L225 Difference]: With dead ends: 111 [2021-05-02 23:01:44,081 INFO L226 Difference]: Without dead ends: 74 [2021-05-02 23:01:44,082 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 184.4ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-05-02 23:01:44,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-02 23:01:44,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2021-05-02 23:01:44,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:44,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2021-05-02 23:01:44,089 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 65 [2021-05-02 23:01:44,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:44,089 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2021-05-02 23:01:44,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:44,090 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2021-05-02 23:01:44,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-02 23:01:44,090 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:44,090 INFO L523 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:44,090 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-02 23:01:44,091 INFO L428 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:44,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:44,091 INFO L82 PathProgramCache]: Analyzing trace with hash -595686744, now seen corresponding path program 12 times [2021-05-02 23:01:44,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:44,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [66309500] [2021-05-02 23:01:44,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:44,096 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:44,097 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:44,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:44,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:44,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:44,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:01:44,335 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:44,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [66309500] [2021-05-02 23:01:44,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [66309500] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:44,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:44,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-02 23:01:44,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21417416] [2021-05-02 23:01:44,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 23:01:44,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:44,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 23:01:44,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-02 23:01:44,336 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:44,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:44,759 INFO L93 Difference]: Finished difference Result 119 states and 122 transitions. [2021-05-02 23:01:44,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 23:01:44,760 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2021-05-02 23:01:44,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:44,761 INFO L225 Difference]: With dead ends: 119 [2021-05-02 23:01:44,761 INFO L226 Difference]: Without dead ends: 79 [2021-05-02 23:01:44,761 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 201.9ms TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:01:44,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-02 23:01:44,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2021-05-02 23:01:44,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 states have internal predecessors, (74), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:44,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2021-05-02 23:01:44,767 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 70 [2021-05-02 23:01:44,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:44,767 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2021-05-02 23:01:44,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:44,768 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2021-05-02 23:01:44,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 23:01:44,768 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:44,768 INFO L523 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:44,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-02 23:01:44,768 INFO L428 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:44,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:44,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1264174643, now seen corresponding path program 13 times [2021-05-02 23:01:44,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:44,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765547484] [2021-05-02 23:01:44,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:44,774 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:44,775 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:44,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:45,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:45,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:45,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:01:45,073 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:45,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1765547484] [2021-05-02 23:01:45,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1765547484] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:45,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:45,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-02 23:01:45,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930341893] [2021-05-02 23:01:45,074 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 23:01:45,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:45,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 23:01:45,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:01:45,075 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:45,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:45,575 INFO L93 Difference]: Finished difference Result 127 states and 130 transitions. [2021-05-02 23:01:45,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 23:01:45,575 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2021-05-02 23:01:45,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:45,576 INFO L225 Difference]: With dead ends: 127 [2021-05-02 23:01:45,576 INFO L226 Difference]: Without dead ends: 84 [2021-05-02 23:01:45,577 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 241.1ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:01:45,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-02 23:01:45,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2021-05-02 23:01:45,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 77 states have (on average 1.025974025974026) internal successors, (79), 77 states have internal predecessors, (79), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:45,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2021-05-02 23:01:45,582 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 75 [2021-05-02 23:01:45,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:45,582 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2021-05-02 23:01:45,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:45,583 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2021-05-02 23:01:45,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 23:01:45,583 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:45,583 INFO L523 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:45,583 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-02 23:01:45,583 INFO L428 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:45,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:45,584 INFO L82 PathProgramCache]: Analyzing trace with hash 407708556, now seen corresponding path program 14 times [2021-05-02 23:01:45,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:45,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465397964] [2021-05-02 23:01:45,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:45,597 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:45,599 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:45,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:45,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:45,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:45,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:01:45,875 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:45,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [465397964] [2021-05-02 23:01:45,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [465397964] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:45,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:45,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-02 23:01:45,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155733136] [2021-05-02 23:01:45,876 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 23:01:45,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:45,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 23:01:45,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:01:45,877 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:46,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:46,409 INFO L93 Difference]: Finished difference Result 135 states and 138 transitions. [2021-05-02 23:01:46,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 23:01:46,409 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2021-05-02 23:01:46,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:46,410 INFO L225 Difference]: With dead ends: 135 [2021-05-02 23:01:46,410 INFO L226 Difference]: Without dead ends: 89 [2021-05-02 23:01:46,410 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 234.6ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-02 23:01:46,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-02 23:01:46,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2021-05-02 23:01:46,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 82 states have (on average 1.024390243902439) internal successors, (84), 82 states have internal predecessors, (84), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:46,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2021-05-02 23:01:46,415 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 80 [2021-05-02 23:01:46,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:46,416 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2021-05-02 23:01:46,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:46,416 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2021-05-02 23:01:46,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-02 23:01:46,416 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:46,417 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:46,417 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-05-02 23:01:46,417 INFO L428 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:46,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:46,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1855190807, now seen corresponding path program 15 times [2021-05-02 23:01:46,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:46,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955097775] [2021-05-02 23:01:46,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:46,422 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:46,423 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:46,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:46,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:46,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:46,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:01:46,732 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:46,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955097775] [2021-05-02 23:01:46,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [955097775] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:46,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:46,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-05-02 23:01:46,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108697104] [2021-05-02 23:01:46,732 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 23:01:46,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:46,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 23:01:46,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-02 23:01:46,733 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:47,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:47,384 INFO L93 Difference]: Finished difference Result 143 states and 146 transitions. [2021-05-02 23:01:47,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 23:01:47,385 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2021-05-02 23:01:47,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:47,385 INFO L225 Difference]: With dead ends: 143 [2021-05-02 23:01:47,385 INFO L226 Difference]: Without dead ends: 94 [2021-05-02 23:01:47,386 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 262.6ms TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-05-02 23:01:47,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-02 23:01:47,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2021-05-02 23:01:47,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 87 states have internal predecessors, (89), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:47,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2021-05-02 23:01:47,393 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 85 [2021-05-02 23:01:47,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:47,394 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2021-05-02 23:01:47,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:47,394 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2021-05-02 23:01:47,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-02 23:01:47,394 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:47,394 INFO L523 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:47,394 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-05-02 23:01:47,395 INFO L428 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:47,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:47,395 INFO L82 PathProgramCache]: Analyzing trace with hash 741309552, now seen corresponding path program 16 times [2021-05-02 23:01:47,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:47,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [231521857] [2021-05-02 23:01:47,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:47,404 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:47,405 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:47,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:47,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:47,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:47,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:01:47,756 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:47,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [231521857] [2021-05-02 23:01:47,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [231521857] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:47,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:47,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-05-02 23:01:47,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345144009] [2021-05-02 23:01:47,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 23:01:47,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:47,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 23:01:47,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-05-02 23:01:47,757 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:48,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:48,499 INFO L93 Difference]: Finished difference Result 151 states and 154 transitions. [2021-05-02 23:01:48,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 23:01:48,500 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2021-05-02 23:01:48,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:48,501 INFO L225 Difference]: With dead ends: 151 [2021-05-02 23:01:48,501 INFO L226 Difference]: Without dead ends: 99 [2021-05-02 23:01:48,502 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 301.0ms TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:01:48,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-05-02 23:01:48,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2021-05-02 23:01:48,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 states have internal predecessors, (94), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:48,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2021-05-02 23:01:48,509 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 90 [2021-05-02 23:01:48,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:48,509 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2021-05-02 23:01:48,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:48,510 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2021-05-02 23:01:48,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-02 23:01:48,510 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:48,510 INFO L523 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:48,510 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-02 23:01:48,510 INFO L428 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:48,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:48,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1721038853, now seen corresponding path program 17 times [2021-05-02 23:01:48,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:48,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375174660] [2021-05-02 23:01:48,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:48,517 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:48,519 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:48,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:48,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:48,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:48,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:01:48,863 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:48,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375174660] [2021-05-02 23:01:48,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [375174660] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:48,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:48,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-05-02 23:01:48,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412297397] [2021-05-02 23:01:48,864 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 23:01:48,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:48,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 23:01:48,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:01:48,865 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:49,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:49,566 INFO L93 Difference]: Finished difference Result 159 states and 162 transitions. [2021-05-02 23:01:49,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 23:01:49,567 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2021-05-02 23:01:49,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:49,567 INFO L225 Difference]: With dead ends: 159 [2021-05-02 23:01:49,567 INFO L226 Difference]: Without dead ends: 104 [2021-05-02 23:01:49,568 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 300.2ms TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:01:49,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-02 23:01:49,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 101. [2021-05-02 23:01:49,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 97 states have (on average 1.0206185567010309) internal successors, (99), 97 states have internal predecessors, (99), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:49,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2021-05-02 23:01:49,573 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 95 [2021-05-02 23:01:49,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:49,573 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2021-05-02 23:01:49,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:49,574 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2021-05-02 23:01:49,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-02 23:01:49,574 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:49,574 INFO L523 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:49,574 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-05-02 23:01:49,574 INFO L428 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:49,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:49,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1469568340, now seen corresponding path program 18 times [2021-05-02 23:01:49,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:49,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [689845674] [2021-05-02 23:01:49,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:49,582 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:49,583 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:49,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:49,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:49,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:49,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:01:49,936 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:49,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [689845674] [2021-05-02 23:01:49,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [689845674] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:49,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:49,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-02 23:01:49,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109214344] [2021-05-02 23:01:49,936 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 23:01:49,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:49,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 23:01:49,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:01:49,937 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:50,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:50,699 INFO L93 Difference]: Finished difference Result 167 states and 170 transitions. [2021-05-02 23:01:50,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 23:01:50,700 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 100 [2021-05-02 23:01:50,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:50,702 INFO L225 Difference]: With dead ends: 167 [2021-05-02 23:01:50,702 INFO L226 Difference]: Without dead ends: 109 [2021-05-02 23:01:50,703 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 308.0ms TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:01:50,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-02 23:01:50,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 106. [2021-05-02 23:01:50,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 102 states have (on average 1.0196078431372548) internal successors, (104), 102 states have internal predecessors, (104), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:50,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2021-05-02 23:01:50,709 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 100 [2021-05-02 23:01:50,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:50,710 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2021-05-02 23:01:50,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:50,710 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2021-05-02 23:01:50,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-02 23:01:50,711 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:50,711 INFO L523 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:50,711 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-05-02 23:01:50,711 INFO L428 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:50,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:50,712 INFO L82 PathProgramCache]: Analyzing trace with hash -412170463, now seen corresponding path program 19 times [2021-05-02 23:01:50,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:50,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702071092] [2021-05-02 23:01:50,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:50,719 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:50,720 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:50,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:51,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:51,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:51,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:01:51,123 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:51,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702071092] [2021-05-02 23:01:51,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1702071092] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:51,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:51,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-05-02 23:01:51,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507899816] [2021-05-02 23:01:51,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 23:01:51,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:51,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 23:01:51,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:01:51,126 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:51,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:51,879 INFO L93 Difference]: Finished difference Result 175 states and 178 transitions. [2021-05-02 23:01:51,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 23:01:51,880 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 105 [2021-05-02 23:01:51,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:51,880 INFO L225 Difference]: With dead ends: 175 [2021-05-02 23:01:51,880 INFO L226 Difference]: Without dead ends: 114 [2021-05-02 23:01:51,881 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 327.6ms TimeCoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-05-02 23:01:51,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-05-02 23:01:51,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2021-05-02 23:01:51,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 107 states have internal predecessors, (109), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:51,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2021-05-02 23:01:51,888 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 105 [2021-05-02 23:01:51,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:51,888 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2021-05-02 23:01:51,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:51,888 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2021-05-02 23:01:51,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-02 23:01:51,889 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:51,889 INFO L523 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:51,889 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-05-02 23:01:51,889 INFO L428 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:51,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:51,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1921487304, now seen corresponding path program 20 times [2021-05-02 23:01:51,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:51,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [219820460] [2021-05-02 23:01:51,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:51,895 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:51,896 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:51,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:52,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:52,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:52,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:01:52,344 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:52,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [219820460] [2021-05-02 23:01:52,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [219820460] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:52,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:52,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-05-02 23:01:52,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072951438] [2021-05-02 23:01:52,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 23:01:52,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:52,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 23:01:52,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-05-02 23:01:52,345 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:53,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:53,306 INFO L93 Difference]: Finished difference Result 183 states and 186 transitions. [2021-05-02 23:01:53,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 23:01:53,307 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 110 [2021-05-02 23:01:53,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:53,308 INFO L225 Difference]: With dead ends: 183 [2021-05-02 23:01:53,308 INFO L226 Difference]: Without dead ends: 119 [2021-05-02 23:01:53,309 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 374.8ms TimeCoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:01:53,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-02 23:01:53,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 116. [2021-05-02 23:01:53,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 112 states have (on average 1.0178571428571428) internal successors, (114), 112 states have internal predecessors, (114), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:53,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 117 transitions. [2021-05-02 23:01:53,315 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 117 transitions. Word has length 110 [2021-05-02 23:01:53,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:53,315 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 117 transitions. [2021-05-02 23:01:53,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:53,315 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 117 transitions. [2021-05-02 23:01:53,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-02 23:01:53,316 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:53,316 INFO L523 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:53,316 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-05-02 23:01:53,316 INFO L428 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:53,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:53,317 INFO L82 PathProgramCache]: Analyzing trace with hash -507038147, now seen corresponding path program 21 times [2021-05-02 23:01:53,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:53,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649572871] [2021-05-02 23:01:53,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:53,322 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:53,324 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:53,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:53,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:53,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:53,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:01:53,796 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:53,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649572871] [2021-05-02 23:01:53,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1649572871] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:53,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:53,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-05-02 23:01:53,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179914330] [2021-05-02 23:01:53,797 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 23:01:53,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:53,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 23:01:53,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:01:53,798 INFO L87 Difference]: Start difference. First operand 116 states and 117 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:54,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:54,767 INFO L93 Difference]: Finished difference Result 191 states and 194 transitions. [2021-05-02 23:01:54,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 23:01:54,767 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 115 [2021-05-02 23:01:54,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:54,768 INFO L225 Difference]: With dead ends: 191 [2021-05-02 23:01:54,768 INFO L226 Difference]: Without dead ends: 124 [2021-05-02 23:01:54,769 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 429.4ms TimeCoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:01:54,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-05-02 23:01:54,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 121. [2021-05-02 23:01:54,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 117 states have (on average 1.017094017094017) internal successors, (119), 117 states have internal predecessors, (119), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:54,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2021-05-02 23:01:54,775 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 115 [2021-05-02 23:01:54,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:54,775 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2021-05-02 23:01:54,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:54,776 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2021-05-02 23:01:54,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-02 23:01:54,776 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:54,776 INFO L523 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:54,777 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-05-02 23:01:54,777 INFO L428 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:54,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:54,777 INFO L82 PathProgramCache]: Analyzing trace with hash -666663140, now seen corresponding path program 22 times [2021-05-02 23:01:54,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:54,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2046139904] [2021-05-02 23:01:54,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:54,785 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:54,786 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:54,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:55,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:55,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:55,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:01:55,302 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:55,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2046139904] [2021-05-02 23:01:55,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2046139904] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:55,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:55,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-05-02 23:01:55,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446975179] [2021-05-02 23:01:55,302 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 23:01:55,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:55,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 23:01:55,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:01:55,303 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:56,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:56,340 INFO L93 Difference]: Finished difference Result 199 states and 202 transitions. [2021-05-02 23:01:56,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 23:01:56,340 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 120 [2021-05-02 23:01:56,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:56,341 INFO L225 Difference]: With dead ends: 199 [2021-05-02 23:01:56,341 INFO L226 Difference]: Without dead ends: 129 [2021-05-02 23:01:56,341 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 437.4ms TimeCoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2021-05-02 23:01:56,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-02 23:01:56,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 126. [2021-05-02 23:01:56,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 122 states have (on average 1.0163934426229508) internal successors, (124), 122 states have internal predecessors, (124), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:56,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2021-05-02 23:01:56,347 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 120 [2021-05-02 23:01:56,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:56,347 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2021-05-02 23:01:56,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:56,348 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2021-05-02 23:01:56,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-05-02 23:01:56,348 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:56,349 INFO L523 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:56,349 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-05-02 23:01:56,349 INFO L428 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:56,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:56,349 INFO L82 PathProgramCache]: Analyzing trace with hash -638843559, now seen corresponding path program 23 times [2021-05-02 23:01:56,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:56,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2064953778] [2021-05-02 23:01:56,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:56,358 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:56,359 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:56,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:56,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:56,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:56,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:01:56,869 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:56,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2064953778] [2021-05-02 23:01:56,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2064953778] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:56,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:56,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-05-02 23:01:56,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282441864] [2021-05-02 23:01:56,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-02 23:01:56,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:56,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-02 23:01:56,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2021-05-02 23:01:56,871 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:57,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:57,993 INFO L93 Difference]: Finished difference Result 207 states and 210 transitions. [2021-05-02 23:01:57,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 23:01:57,993 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 125 [2021-05-02 23:01:57,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:57,994 INFO L225 Difference]: With dead ends: 207 [2021-05-02 23:01:57,994 INFO L226 Difference]: Without dead ends: 134 [2021-05-02 23:01:57,995 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 436.7ms TimeCoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-05-02 23:01:57,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-05-02 23:01:57,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 131. [2021-05-02 23:01:57,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 127 states have (on average 1.015748031496063) internal successors, (129), 127 states have internal predecessors, (129), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:58,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2021-05-02 23:01:58,000 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 125 [2021-05-02 23:01:58,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:58,000 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2021-05-02 23:01:58,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:58,001 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2021-05-02 23:01:58,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-02 23:01:58,001 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:58,002 INFO L523 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:58,002 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-05-02 23:01:58,002 INFO L428 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:58,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:58,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1108647936, now seen corresponding path program 24 times [2021-05-02 23:01:58,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:58,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2099130363] [2021-05-02 23:01:58,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:58,009 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:58,010 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:58,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:58,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:58,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:58,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:01:58,518 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:58,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2099130363] [2021-05-02 23:01:58,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2099130363] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:58,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:58,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-05-02 23:01:58,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059636557] [2021-05-02 23:01:58,519 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 23:01:58,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:58,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 23:01:58,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-05-02 23:01:58,520 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:59,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:59,641 INFO L93 Difference]: Finished difference Result 215 states and 218 transitions. [2021-05-02 23:01:59,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-02 23:01:59,641 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 130 [2021-05-02 23:01:59,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:59,642 INFO L225 Difference]: With dead ends: 215 [2021-05-02 23:01:59,642 INFO L226 Difference]: Without dead ends: 139 [2021-05-02 23:01:59,643 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 424.9ms TimeCoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2021-05-02 23:01:59,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-05-02 23:01:59,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 136. [2021-05-02 23:01:59,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 132 states have (on average 1.0151515151515151) internal successors, (134), 132 states have internal predecessors, (134), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:59,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2021-05-02 23:01:59,648 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 130 [2021-05-02 23:01:59,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:59,648 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2021-05-02 23:01:59,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:59,649 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2021-05-02 23:01:59,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-05-02 23:01:59,649 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:59,650 INFO L523 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:59,650 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-05-02 23:01:59,650 INFO L428 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:59,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:59,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1498745739, now seen corresponding path program 25 times [2021-05-02 23:01:59,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:59,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [415866950] [2021-05-02 23:01:59,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:59,660 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:59,661 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:59,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:00,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:00,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:00,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:00,190 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:00,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [415866950] [2021-05-02 23:02:00,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [415866950] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:00,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:00,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2021-05-02 23:02:00,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741118882] [2021-05-02 23:02:00,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-02 23:02:00,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:00,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-02 23:02:00,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2021-05-02 23:02:00,192 INFO L87 Difference]: Start difference. First operand 136 states and 137 transitions. Second operand has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:01,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:01,350 INFO L93 Difference]: Finished difference Result 223 states and 226 transitions. [2021-05-02 23:02:01,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 23:02:01,351 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 135 [2021-05-02 23:02:01,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:01,351 INFO L225 Difference]: With dead ends: 223 [2021-05-02 23:02:01,351 INFO L226 Difference]: Without dead ends: 144 [2021-05-02 23:02:01,352 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 456.0ms TimeCoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-05-02 23:02:01,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-05-02 23:02:01,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 141. [2021-05-02 23:02:01,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 137 states have (on average 1.0145985401459854) internal successors, (139), 137 states have internal predecessors, (139), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:01,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2021-05-02 23:02:01,358 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 135 [2021-05-02 23:02:01,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:01,358 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2021-05-02 23:02:01,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:01,358 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2021-05-02 23:02:01,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-05-02 23:02:01,359 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:01,359 INFO L523 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:01,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-05-02 23:02:01,359 INFO L428 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:01,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:01,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1545455388, now seen corresponding path program 26 times [2021-05-02 23:02:01,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:01,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2047095989] [2021-05-02 23:02:01,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:01,366 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:01,367 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:01,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:01,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:01,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:01,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:01,937 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:01,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2047095989] [2021-05-02 23:02:01,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2047095989] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:01,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:01,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2021-05-02 23:02:01,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282305199] [2021-05-02 23:02:01,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 23:02:01,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:01,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 23:02:01,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2021-05-02 23:02:01,938 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:03,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:03,177 INFO L93 Difference]: Finished difference Result 231 states and 234 transitions. [2021-05-02 23:02:03,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-02 23:02:03,178 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 140 [2021-05-02 23:02:03,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:03,179 INFO L225 Difference]: With dead ends: 231 [2021-05-02 23:02:03,179 INFO L226 Difference]: Without dead ends: 149 [2021-05-02 23:02:03,179 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 509.1ms TimeCoverageRelationStatistics Valid=88, Invalid=842, Unknown=0, NotChecked=0, Total=930 [2021-05-02 23:02:03,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-02 23:02:03,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 146. [2021-05-02 23:02:03,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 142 states have (on average 1.0140845070422535) internal successors, (144), 142 states have internal predecessors, (144), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:03,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 147 transitions. [2021-05-02 23:02:03,185 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 147 transitions. Word has length 140 [2021-05-02 23:02:03,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:03,186 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 147 transitions. [2021-05-02 23:02:03,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:03,186 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 147 transitions. [2021-05-02 23:02:03,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-05-02 23:02:03,187 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:03,187 INFO L523 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:03,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-05-02 23:02:03,187 INFO L428 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:03,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:03,188 INFO L82 PathProgramCache]: Analyzing trace with hash 223462289, now seen corresponding path program 27 times [2021-05-02 23:02:03,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:03,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1581578373] [2021-05-02 23:02:03,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:03,198 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:03,199 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:03,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:03,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:03,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:03,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:03,808 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:03,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1581578373] [2021-05-02 23:02:03,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1581578373] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:03,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:03,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-05-02 23:02:03,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040016881] [2021-05-02 23:02:03,808 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-02 23:02:03,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:03,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-02 23:02:03,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2021-05-02 23:02:03,809 INFO L87 Difference]: Start difference. First operand 146 states and 147 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:05,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:05,138 INFO L93 Difference]: Finished difference Result 239 states and 242 transitions. [2021-05-02 23:02:05,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-02 23:02:05,139 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 145 [2021-05-02 23:02:05,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:05,140 INFO L225 Difference]: With dead ends: 239 [2021-05-02 23:02:05,140 INFO L226 Difference]: Without dead ends: 154 [2021-05-02 23:02:05,140 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 528.3ms TimeCoverageRelationStatistics Valid=91, Invalid=901, Unknown=0, NotChecked=0, Total=992 [2021-05-02 23:02:05,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-05-02 23:02:05,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 151. [2021-05-02 23:02:05,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 147 states have (on average 1.0136054421768708) internal successors, (149), 147 states have internal predecessors, (149), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:05,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2021-05-02 23:02:05,146 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 145 [2021-05-02 23:02:05,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:05,146 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2021-05-02 23:02:05,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:05,146 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2021-05-02 23:02:05,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-05-02 23:02:05,147 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:05,147 INFO L523 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:05,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-05-02 23:02:05,147 INFO L428 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:05,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:05,148 INFO L82 PathProgramCache]: Analyzing trace with hash 857362888, now seen corresponding path program 28 times [2021-05-02 23:02:05,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:05,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1312103865] [2021-05-02 23:02:05,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:05,155 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:05,156 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:05,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:05,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:05,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:05,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:05,771 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:05,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1312103865] [2021-05-02 23:02:05,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1312103865] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:05,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:05,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2021-05-02 23:02:05,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528536845] [2021-05-02 23:02:05,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 23:02:05,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:05,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 23:02:05,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2021-05-02 23:02:05,772 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:07,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:07,230 INFO L93 Difference]: Finished difference Result 247 states and 250 transitions. [2021-05-02 23:02:07,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-02 23:02:07,231 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 150 [2021-05-02 23:02:07,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:07,231 INFO L225 Difference]: With dead ends: 247 [2021-05-02 23:02:07,231 INFO L226 Difference]: Without dead ends: 159 [2021-05-02 23:02:07,232 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 537.7ms TimeCoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 23:02:07,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-05-02 23:02:07,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 156. [2021-05-02 23:02:07,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 152 states have (on average 1.013157894736842) internal successors, (154), 152 states have internal predecessors, (154), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:07,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 157 transitions. [2021-05-02 23:02:07,238 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 157 transitions. Word has length 150 [2021-05-02 23:02:07,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:07,238 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 157 transitions. [2021-05-02 23:02:07,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:07,239 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 157 transitions. [2021-05-02 23:02:07,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-05-02 23:02:07,239 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:07,239 INFO L523 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:07,239 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-05-02 23:02:07,240 INFO L428 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:07,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:07,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1571697325, now seen corresponding path program 29 times [2021-05-02 23:02:07,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:07,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [177872505] [2021-05-02 23:02:07,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:07,245 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:07,246 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:07,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:07,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:07,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:07,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:07,884 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:07,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [177872505] [2021-05-02 23:02:07,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [177872505] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:07,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:07,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2021-05-02 23:02:07,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029601367] [2021-05-02 23:02:07,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-02 23:02:07,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:07,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-02 23:02:07,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 23:02:07,885 INFO L87 Difference]: Start difference. First operand 156 states and 157 transitions. Second operand has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 32 states have internal predecessors, (68), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:09,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:09,404 INFO L93 Difference]: Finished difference Result 255 states and 258 transitions. [2021-05-02 23:02:09,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-02 23:02:09,417 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 32 states have internal predecessors, (68), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2021-05-02 23:02:09,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:09,418 INFO L225 Difference]: With dead ends: 255 [2021-05-02 23:02:09,418 INFO L226 Difference]: Without dead ends: 164 [2021-05-02 23:02:09,419 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 556.1ms TimeCoverageRelationStatistics Valid=97, Invalid=1025, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 23:02:09,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-05-02 23:02:09,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 161. [2021-05-02 23:02:09,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 157 states have (on average 1.0127388535031847) internal successors, (159), 157 states have internal predecessors, (159), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:09,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2021-05-02 23:02:09,425 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 155 [2021-05-02 23:02:09,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:09,425 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2021-05-02 23:02:09,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 32 states have internal predecessors, (68), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:09,425 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2021-05-02 23:02:09,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-05-02 23:02:09,426 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:09,426 INFO L523 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:09,426 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-05-02 23:02:09,426 INFO L428 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:09,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:09,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1140462932, now seen corresponding path program 30 times [2021-05-02 23:02:09,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:09,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1739640612] [2021-05-02 23:02:09,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:09,431 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:09,432 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:09,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:10,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:10,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:10,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:10,121 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:10,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1739640612] [2021-05-02 23:02:10,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1739640612] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:10,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:10,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2021-05-02 23:02:10,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064179177] [2021-05-02 23:02:10,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-02 23:02:10,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:10,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-02 23:02:10,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 23:02:10,123 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:11,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:11,847 INFO L93 Difference]: Finished difference Result 263 states and 266 transitions. [2021-05-02 23:02:11,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-02 23:02:11,847 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 160 [2021-05-02 23:02:11,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:11,848 INFO L225 Difference]: With dead ends: 263 [2021-05-02 23:02:11,848 INFO L226 Difference]: Without dead ends: 169 [2021-05-02 23:02:11,849 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 609.4ms TimeCoverageRelationStatistics Valid=100, Invalid=1090, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 23:02:11,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-05-02 23:02:11,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 166. [2021-05-02 23:02:11,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 162 states have (on average 1.0123456790123457) internal successors, (164), 162 states have internal predecessors, (164), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:11,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 167 transitions. [2021-05-02 23:02:11,855 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 167 transitions. Word has length 160 [2021-05-02 23:02:11,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:11,855 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 167 transitions. [2021-05-02 23:02:11,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:11,856 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 167 transitions. [2021-05-02 23:02:11,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-05-02 23:02:11,856 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:11,857 INFO L523 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:11,857 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-05-02 23:02:11,857 INFO L428 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:11,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:11,857 INFO L82 PathProgramCache]: Analyzing trace with hash 235798985, now seen corresponding path program 31 times [2021-05-02 23:02:11,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:11,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1347531344] [2021-05-02 23:02:11,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:11,863 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:11,864 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:11,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:12,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:12,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:12,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:12,703 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:12,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1347531344] [2021-05-02 23:02:12,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1347531344] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:12,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:12,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2021-05-02 23:02:12,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272119924] [2021-05-02 23:02:12,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-02 23:02:12,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:12,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-02 23:02:12,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 23:02:12,705 INFO L87 Difference]: Start difference. First operand 166 states and 167 transitions. Second operand has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:14,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:14,392 INFO L93 Difference]: Finished difference Result 271 states and 274 transitions. [2021-05-02 23:02:14,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 23:02:14,392 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 165 [2021-05-02 23:02:14,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:14,393 INFO L225 Difference]: With dead ends: 271 [2021-05-02 23:02:14,393 INFO L226 Difference]: Without dead ends: 174 [2021-05-02 23:02:14,393 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 766.5ms TimeCoverageRelationStatistics Valid=103, Invalid=1157, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 23:02:14,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-05-02 23:02:14,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 171. [2021-05-02 23:02:14,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 167 states have (on average 1.0119760479041917) internal successors, (169), 167 states have internal predecessors, (169), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:14,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2021-05-02 23:02:14,398 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 165 [2021-05-02 23:02:14,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:14,399 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2021-05-02 23:02:14,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:14,399 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2021-05-02 23:02:14,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-05-02 23:02:14,400 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:14,400 INFO L523 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:14,400 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-05-02 23:02:14,400 INFO L428 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:14,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:14,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1701362800, now seen corresponding path program 32 times [2021-05-02 23:02:14,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:14,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589010966] [2021-05-02 23:02:14,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:14,406 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:14,407 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:14,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:15,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:15,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:15,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:15,158 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:15,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589010966] [2021-05-02 23:02:15,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [589010966] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:15,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:15,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2021-05-02 23:02:15,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642255836] [2021-05-02 23:02:15,158 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 23:02:15,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:15,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 23:02:15,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1159, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 23:02:15,159 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 states have internal predecessors, (74), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:16,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:16,989 INFO L93 Difference]: Finished difference Result 279 states and 282 transitions. [2021-05-02 23:02:16,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-02 23:02:16,989 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 states have internal predecessors, (74), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 170 [2021-05-02 23:02:16,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:16,990 INFO L225 Difference]: With dead ends: 279 [2021-05-02 23:02:16,990 INFO L226 Difference]: Without dead ends: 179 [2021-05-02 23:02:16,991 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 643.9ms TimeCoverageRelationStatistics Valid=106, Invalid=1226, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 23:02:16,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-05-02 23:02:16,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 176. [2021-05-02 23:02:16,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 172 states have (on average 1.0116279069767442) internal successors, (174), 172 states have internal predecessors, (174), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:16,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 177 transitions. [2021-05-02 23:02:16,997 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 177 transitions. Word has length 170 [2021-05-02 23:02:16,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:16,997 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 177 transitions. [2021-05-02 23:02:16,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 states have internal predecessors, (74), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:16,997 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 177 transitions. [2021-05-02 23:02:16,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-05-02 23:02:16,998 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:16,998 INFO L523 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:16,998 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-05-02 23:02:16,998 INFO L428 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:16,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:16,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1463742693, now seen corresponding path program 33 times [2021-05-02 23:02:16,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:16,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1492400783] [2021-05-02 23:02:16,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:17,005 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:17,006 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:17,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:17,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:17,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:17,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:17,833 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:17,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1492400783] [2021-05-02 23:02:17,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1492400783] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:17,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:17,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2021-05-02 23:02:17,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188198849] [2021-05-02 23:02:17,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-02 23:02:17,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:17,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-02 23:02:17,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 23:02:17,835 INFO L87 Difference]: Start difference. First operand 176 states and 177 transitions. Second operand has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 36 states have internal predecessors, (76), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:19,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:19,809 INFO L93 Difference]: Finished difference Result 287 states and 290 transitions. [2021-05-02 23:02:19,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-02 23:02:19,810 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 36 states have internal predecessors, (76), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 175 [2021-05-02 23:02:19,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:19,810 INFO L225 Difference]: With dead ends: 287 [2021-05-02 23:02:19,810 INFO L226 Difference]: Without dead ends: 184 [2021-05-02 23:02:19,811 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 735.3ms TimeCoverageRelationStatistics Valid=109, Invalid=1297, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 23:02:19,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-05-02 23:02:19,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 181. [2021-05-02 23:02:19,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 177 states have (on average 1.0112994350282485) internal successors, (179), 177 states have internal predecessors, (179), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:19,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2021-05-02 23:02:19,817 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 175 [2021-05-02 23:02:19,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:19,817 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2021-05-02 23:02:19,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 36 states have internal predecessors, (76), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:19,817 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2021-05-02 23:02:19,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-05-02 23:02:19,818 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:19,818 INFO L523 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:19,818 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-05-02 23:02:19,818 INFO L428 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:19,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:19,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1707041676, now seen corresponding path program 34 times [2021-05-02 23:02:19,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:19,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942519667] [2021-05-02 23:02:19,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:19,824 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:19,825 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:19,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:20,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:20,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:20,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:20,655 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:20,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1942519667] [2021-05-02 23:02:20,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1942519667] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:20,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:20,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2021-05-02 23:02:20,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111767983] [2021-05-02 23:02:20,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-02 23:02:20,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:20,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-02 23:02:20,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1299, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 23:02:20,657 INFO L87 Difference]: Start difference. First operand 181 states and 182 transitions. Second operand has 38 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 37 states have internal predecessors, (78), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:22,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:22,772 INFO L93 Difference]: Finished difference Result 295 states and 298 transitions. [2021-05-02 23:02:22,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 23:02:22,772 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 37 states have internal predecessors, (78), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 180 [2021-05-02 23:02:22,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:22,773 INFO L225 Difference]: With dead ends: 295 [2021-05-02 23:02:22,773 INFO L226 Difference]: Without dead ends: 189 [2021-05-02 23:02:22,774 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 740.2ms TimeCoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 23:02:22,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-05-02 23:02:22,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 186. [2021-05-02 23:02:22,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 182 states have (on average 1.010989010989011) internal successors, (184), 182 states have internal predecessors, (184), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:22,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 187 transitions. [2021-05-02 23:02:22,780 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 187 transitions. Word has length 180 [2021-05-02 23:02:22,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:22,780 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 187 transitions. [2021-05-02 23:02:22,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 37 states have internal predecessors, (78), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:22,780 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 187 transitions. [2021-05-02 23:02:22,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-05-02 23:02:22,781 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:22,781 INFO L523 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:22,781 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-05-02 23:02:22,782 INFO L428 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:22,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:22,782 INFO L82 PathProgramCache]: Analyzing trace with hash -795951103, now seen corresponding path program 35 times [2021-05-02 23:02:22,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:22,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [432755659] [2021-05-02 23:02:22,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:22,787 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:22,788 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:22,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:23,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:23,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:23,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:23,678 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:23,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [432755659] [2021-05-02 23:02:23,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [432755659] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:23,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:23,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2021-05-02 23:02:23,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269545494] [2021-05-02 23:02:23,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-02 23:02:23,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:23,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-02 23:02:23,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 23:02:23,680 INFO L87 Difference]: Start difference. First operand 186 states and 187 transitions. Second operand has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 38 states have internal predecessors, (80), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:25,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:25,864 INFO L93 Difference]: Finished difference Result 303 states and 306 transitions. [2021-05-02 23:02:25,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-02 23:02:25,864 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 38 states have internal predecessors, (80), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 185 [2021-05-02 23:02:25,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:25,865 INFO L225 Difference]: With dead ends: 303 [2021-05-02 23:02:25,865 INFO L226 Difference]: Without dead ends: 194 [2021-05-02 23:02:25,866 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 789.4ms TimeCoverageRelationStatistics Valid=115, Invalid=1445, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 23:02:25,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-05-02 23:02:25,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 191. [2021-05-02 23:02:25,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 187 states have (on average 1.0106951871657754) internal successors, (189), 187 states have internal predecessors, (189), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:25,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 192 transitions. [2021-05-02 23:02:25,872 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 192 transitions. Word has length 185 [2021-05-02 23:02:25,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:25,872 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 192 transitions. [2021-05-02 23:02:25,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 38 states have internal predecessors, (80), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:25,873 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 192 transitions. [2021-05-02 23:02:25,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-05-02 23:02:25,873 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:25,874 INFO L523 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:25,874 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-05-02 23:02:25,874 INFO L428 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:25,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:25,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1509176664, now seen corresponding path program 36 times [2021-05-02 23:02:25,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:25,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1496585220] [2021-05-02 23:02:25,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:25,879 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:25,880 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:25,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:26,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:26,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:26,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:26,756 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:26,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1496585220] [2021-05-02 23:02:26,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1496585220] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:26,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:26,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2021-05-02 23:02:26,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779461674] [2021-05-02 23:02:26,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-02 23:02:26,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:26,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-02 23:02:26,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1447, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 23:02:26,758 INFO L87 Difference]: Start difference. First operand 191 states and 192 transitions. Second operand has 40 states, 40 states have (on average 2.05) internal successors, (82), 39 states have internal predecessors, (82), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:28,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:28,975 INFO L93 Difference]: Finished difference Result 311 states and 314 transitions. [2021-05-02 23:02:28,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-02 23:02:28,976 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.05) internal successors, (82), 39 states have internal predecessors, (82), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 190 [2021-05-02 23:02:28,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:28,976 INFO L225 Difference]: With dead ends: 311 [2021-05-02 23:02:28,976 INFO L226 Difference]: Without dead ends: 199 [2021-05-02 23:02:28,977 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 774.4ms TimeCoverageRelationStatistics Valid=118, Invalid=1522, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 23:02:28,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-05-02 23:02:28,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 196. [2021-05-02 23:02:28,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 192 states have (on average 1.0104166666666667) internal successors, (194), 192 states have internal predecessors, (194), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:28,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 197 transitions. [2021-05-02 23:02:28,983 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 197 transitions. Word has length 190 [2021-05-02 23:02:28,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:28,983 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 197 transitions. [2021-05-02 23:02:28,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.05) internal successors, (82), 39 states have internal predecessors, (82), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:28,983 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 197 transitions. [2021-05-02 23:02:28,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-05-02 23:02:28,984 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:28,984 INFO L523 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:28,984 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-05-02 23:02:28,984 INFO L428 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:28,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:28,985 INFO L82 PathProgramCache]: Analyzing trace with hash 197865245, now seen corresponding path program 37 times [2021-05-02 23:02:28,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:28,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301988767] [2021-05-02 23:02:28,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:28,990 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:28,991 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:29,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:30,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:30,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:30,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:30,017 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:30,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1301988767] [2021-05-02 23:02:30,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1301988767] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:30,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:30,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2021-05-02 23:02:30,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798437157] [2021-05-02 23:02:30,017 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-02 23:02:30,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:30,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-02 23:02:30,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1524, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 23:02:30,018 INFO L87 Difference]: Start difference. First operand 196 states and 197 transitions. Second operand has 41 states, 41 states have (on average 2.048780487804878) internal successors, (84), 40 states have internal predecessors, (84), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:32,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:32,315 INFO L93 Difference]: Finished difference Result 319 states and 322 transitions. [2021-05-02 23:02:32,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-02 23:02:32,316 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.048780487804878) internal successors, (84), 40 states have internal predecessors, (84), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 195 [2021-05-02 23:02:32,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:32,317 INFO L225 Difference]: With dead ends: 319 [2021-05-02 23:02:32,317 INFO L226 Difference]: Without dead ends: 204 [2021-05-02 23:02:32,317 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 924.2ms TimeCoverageRelationStatistics Valid=121, Invalid=1601, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 23:02:32,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-05-02 23:02:32,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 201. [2021-05-02 23:02:32,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 197 states have (on average 1.0101522842639594) internal successors, (199), 197 states have internal predecessors, (199), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:32,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 202 transitions. [2021-05-02 23:02:32,322 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 202 transitions. Word has length 195 [2021-05-02 23:02:32,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:32,322 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 202 transitions. [2021-05-02 23:02:32,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.048780487804878) internal successors, (84), 40 states have internal predecessors, (84), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:32,323 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 202 transitions. [2021-05-02 23:02:32,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-05-02 23:02:32,323 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:32,323 INFO L523 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:32,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-05-02 23:02:32,324 INFO L428 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:32,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:32,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1339797956, now seen corresponding path program 38 times [2021-05-02 23:02:32,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:32,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [90365885] [2021-05-02 23:02:32,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:32,329 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:32,330 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:32,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:33,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:33,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:33,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:33,492 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:33,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [90365885] [2021-05-02 23:02:33,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [90365885] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:33,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:33,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2021-05-02 23:02:33,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309966558] [2021-05-02 23:02:33,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-02 23:02:33,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:33,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-02 23:02:33,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1603, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 23:02:33,494 INFO L87 Difference]: Start difference. First operand 201 states and 202 transitions. Second operand has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 41 states have internal predecessors, (86), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:35,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:35,882 INFO L93 Difference]: Finished difference Result 327 states and 330 transitions. [2021-05-02 23:02:35,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-02 23:02:35,883 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 41 states have internal predecessors, (86), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 200 [2021-05-02 23:02:35,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:35,883 INFO L225 Difference]: With dead ends: 327 [2021-05-02 23:02:35,883 INFO L226 Difference]: Without dead ends: 209 [2021-05-02 23:02:35,884 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1040.9ms TimeCoverageRelationStatistics Valid=124, Invalid=1682, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 23:02:35,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-05-02 23:02:35,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 206. [2021-05-02 23:02:35,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 202 states have (on average 1.00990099009901) internal successors, (204), 202 states have internal predecessors, (204), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:35,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 207 transitions. [2021-05-02 23:02:35,888 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 207 transitions. Word has length 200 [2021-05-02 23:02:35,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:35,888 INFO L480 AbstractCegarLoop]: Abstraction has 206 states and 207 transitions. [2021-05-02 23:02:35,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 41 states have internal predecessors, (86), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:35,888 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 207 transitions. [2021-05-02 23:02:35,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-05-02 23:02:35,889 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:35,889 INFO L523 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:35,889 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-05-02 23:02:35,889 INFO L428 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:35,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:35,890 INFO L82 PathProgramCache]: Analyzing trace with hash 826408505, now seen corresponding path program 39 times [2021-05-02 23:02:35,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:35,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1510014773] [2021-05-02 23:02:35,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:35,894 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:35,895 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:35,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:36,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:36,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:36,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:36,946 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:36,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1510014773] [2021-05-02 23:02:36,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1510014773] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:36,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:36,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2021-05-02 23:02:36,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118120673] [2021-05-02 23:02:36,947 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-02 23:02:36,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:36,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-02 23:02:36,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1684, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 23:02:36,948 INFO L87 Difference]: Start difference. First operand 206 states and 207 transitions. Second operand has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:39,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:39,491 INFO L93 Difference]: Finished difference Result 335 states and 338 transitions. [2021-05-02 23:02:39,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-02 23:02:39,492 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 205 [2021-05-02 23:02:39,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:39,493 INFO L225 Difference]: With dead ends: 335 [2021-05-02 23:02:39,493 INFO L226 Difference]: Without dead ends: 214 [2021-05-02 23:02:39,494 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 949.5ms TimeCoverageRelationStatistics Valid=127, Invalid=1765, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 23:02:39,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-05-02 23:02:39,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 211. [2021-05-02 23:02:39,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 207 states have (on average 1.0096618357487923) internal successors, (209), 207 states have internal predecessors, (209), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:39,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 212 transitions. [2021-05-02 23:02:39,509 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 212 transitions. Word has length 205 [2021-05-02 23:02:39,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:39,509 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 212 transitions. [2021-05-02 23:02:39,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:39,510 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 212 transitions. [2021-05-02 23:02:39,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-05-02 23:02:39,510 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:39,511 INFO L523 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:39,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-05-02 23:02:39,511 INFO L428 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:39,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:39,511 INFO L82 PathProgramCache]: Analyzing trace with hash 247670560, now seen corresponding path program 40 times [2021-05-02 23:02:39,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:39,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [42035094] [2021-05-02 23:02:39,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:39,517 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:39,518 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:39,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:40,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:40,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:40,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:40,538 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:40,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [42035094] [2021-05-02 23:02:40,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [42035094] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:40,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:40,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2021-05-02 23:02:40,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974282986] [2021-05-02 23:02:40,538 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-02 23:02:40,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:40,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-02 23:02:40,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1767, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 23:02:40,539 INFO L87 Difference]: Start difference. First operand 211 states and 212 transitions. Second operand has 44 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 43 states have internal predecessors, (90), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:43,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:43,208 INFO L93 Difference]: Finished difference Result 343 states and 346 transitions. [2021-05-02 23:02:43,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-02 23:02:43,208 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 43 states have internal predecessors, (90), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 210 [2021-05-02 23:02:43,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:43,209 INFO L225 Difference]: With dead ends: 343 [2021-05-02 23:02:43,209 INFO L226 Difference]: Without dead ends: 219 [2021-05-02 23:02:43,209 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 913.0ms TimeCoverageRelationStatistics Valid=130, Invalid=1850, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 23:02:43,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-05-02 23:02:43,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 216. [2021-05-02 23:02:43,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 212 states have (on average 1.009433962264151) internal successors, (214), 212 states have internal predecessors, (214), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:43,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 217 transitions. [2021-05-02 23:02:43,216 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 217 transitions. Word has length 210 [2021-05-02 23:02:43,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:43,216 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 217 transitions. [2021-05-02 23:02:43,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 43 states have internal predecessors, (90), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:43,217 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 217 transitions. [2021-05-02 23:02:43,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-05-02 23:02:43,218 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:43,218 INFO L523 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:43,218 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-05-02 23:02:43,218 INFO L428 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:43,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:43,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1681855147, now seen corresponding path program 41 times [2021-05-02 23:02:43,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:43,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [930322628] [2021-05-02 23:02:43,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:43,224 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:43,225 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:43,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:44,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:44,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:44,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:44,400 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:44,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [930322628] [2021-05-02 23:02:44,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [930322628] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:44,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:44,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2021-05-02 23:02:44,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563770735] [2021-05-02 23:02:44,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-05-02 23:02:44,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:44,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-05-02 23:02:44,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1852, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 23:02:44,402 INFO L87 Difference]: Start difference. First operand 216 states and 217 transitions. Second operand has 45 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 44 states have internal predecessors, (92), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:47,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:47,238 INFO L93 Difference]: Finished difference Result 351 states and 354 transitions. [2021-05-02 23:02:47,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-02 23:02:47,238 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 44 states have internal predecessors, (92), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 215 [2021-05-02 23:02:47,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:47,239 INFO L225 Difference]: With dead ends: 351 [2021-05-02 23:02:47,239 INFO L226 Difference]: Without dead ends: 224 [2021-05-02 23:02:47,240 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1070.5ms TimeCoverageRelationStatistics Valid=133, Invalid=1937, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 23:02:47,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-05-02 23:02:47,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 221. [2021-05-02 23:02:47,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 217 states have (on average 1.0092165898617511) internal successors, (219), 217 states have internal predecessors, (219), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:47,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 222 transitions. [2021-05-02 23:02:47,246 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 222 transitions. Word has length 215 [2021-05-02 23:02:47,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:47,247 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 222 transitions. [2021-05-02 23:02:47,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 44 states have internal predecessors, (92), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:47,247 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 222 transitions. [2021-05-02 23:02:47,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-05-02 23:02:47,248 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:47,248 INFO L523 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:47,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-05-02 23:02:47,248 INFO L428 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:47,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:47,248 INFO L82 PathProgramCache]: Analyzing trace with hash -415039484, now seen corresponding path program 42 times [2021-05-02 23:02:47,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:47,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078524236] [2021-05-02 23:02:47,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:47,257 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:47,258 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:47,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:48,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:48,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:48,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:48,460 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:48,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078524236] [2021-05-02 23:02:48,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2078524236] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:48,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:48,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2021-05-02 23:02:48,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583500391] [2021-05-02 23:02:48,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-02 23:02:48,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:48,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-02 23:02:48,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1939, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 23:02:48,461 INFO L87 Difference]: Start difference. First operand 221 states and 222 transitions. Second operand has 46 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 45 states have internal predecessors, (94), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:51,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:51,458 INFO L93 Difference]: Finished difference Result 359 states and 362 transitions. [2021-05-02 23:02:51,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-02 23:02:51,458 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 45 states have internal predecessors, (94), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 220 [2021-05-02 23:02:51,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:51,459 INFO L225 Difference]: With dead ends: 359 [2021-05-02 23:02:51,459 INFO L226 Difference]: Without dead ends: 229 [2021-05-02 23:02:51,460 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1086.6ms TimeCoverageRelationStatistics Valid=136, Invalid=2026, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 23:02:51,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-05-02 23:02:51,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 226. [2021-05-02 23:02:51,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 222 states have (on average 1.009009009009009) internal successors, (224), 222 states have internal predecessors, (224), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:51,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 227 transitions. [2021-05-02 23:02:51,466 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 227 transitions. Word has length 220 [2021-05-02 23:02:51,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:51,466 INFO L480 AbstractCegarLoop]: Abstraction has 226 states and 227 transitions. [2021-05-02 23:02:51,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 45 states have internal predecessors, (94), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:51,466 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 227 transitions. [2021-05-02 23:02:51,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-05-02 23:02:51,467 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:51,467 INFO L523 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:51,467 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-05-02 23:02:51,467 INFO L428 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:51,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:51,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1955970161, now seen corresponding path program 43 times [2021-05-02 23:02:51,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:51,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [224386316] [2021-05-02 23:02:51,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:51,474 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:51,474 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:51,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:52,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:52,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:52,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:52,656 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:52,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [224386316] [2021-05-02 23:02:52,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [224386316] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:52,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:52,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-05-02 23:02:52,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26338910] [2021-05-02 23:02:52,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-02 23:02:52,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:52,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-02 23:02:52,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2028, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 23:02:52,657 INFO L87 Difference]: Start difference. First operand 226 states and 227 transitions. Second operand has 47 states, 47 states have (on average 2.0425531914893615) internal successors, (96), 46 states have internal predecessors, (96), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:55,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:55,745 INFO L93 Difference]: Finished difference Result 367 states and 370 transitions. [2021-05-02 23:02:55,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-02 23:02:55,745 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.0425531914893615) internal successors, (96), 46 states have internal predecessors, (96), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 225 [2021-05-02 23:02:55,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:55,746 INFO L225 Difference]: With dead ends: 367 [2021-05-02 23:02:55,746 INFO L226 Difference]: Without dead ends: 234 [2021-05-02 23:02:55,747 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1061.2ms TimeCoverageRelationStatistics Valid=139, Invalid=2117, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 23:02:55,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-05-02 23:02:55,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 231. [2021-05-02 23:02:55,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 227 states have (on average 1.0088105726872247) internal successors, (229), 227 states have internal predecessors, (229), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:55,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 232 transitions. [2021-05-02 23:02:55,753 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 232 transitions. Word has length 225 [2021-05-02 23:02:55,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:55,753 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 232 transitions. [2021-05-02 23:02:55,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 2.0425531914893615) internal successors, (96), 46 states have internal predecessors, (96), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:55,753 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 232 transitions. [2021-05-02 23:02:55,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-05-02 23:02:55,754 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:55,754 INFO L523 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:55,754 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-05-02 23:02:55,754 INFO L428 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:55,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:55,754 INFO L82 PathProgramCache]: Analyzing trace with hash 244717800, now seen corresponding path program 44 times [2021-05-02 23:02:55,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:55,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [708524009] [2021-05-02 23:02:55,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:55,762 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:55,763 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:55,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:56,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:56,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:56,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:56,946 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:56,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [708524009] [2021-05-02 23:02:56,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [708524009] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:56,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:56,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2021-05-02 23:02:56,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51844008] [2021-05-02 23:02:56,947 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-02 23:02:56,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:56,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-02 23:02:56,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2119, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 23:02:56,947 INFO L87 Difference]: Start difference. First operand 231 states and 232 transitions. Second operand has 48 states, 48 states have (on average 2.0416666666666665) internal successors, (98), 47 states have internal predecessors, (98), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:03:00,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:03:00,208 INFO L93 Difference]: Finished difference Result 375 states and 378 transitions. [2021-05-02 23:03:00,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-02 23:03:00,209 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0416666666666665) internal successors, (98), 47 states have internal predecessors, (98), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 230 [2021-05-02 23:03:00,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:03:00,210 INFO L225 Difference]: With dead ends: 375 [2021-05-02 23:03:00,210 INFO L226 Difference]: Without dead ends: 239 [2021-05-02 23:03:00,210 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1069.1ms TimeCoverageRelationStatistics Valid=142, Invalid=2210, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 23:03:00,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-05-02 23:03:00,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 236. [2021-05-02 23:03:00,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 232 states have (on average 1.0086206896551724) internal successors, (234), 232 states have internal predecessors, (234), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:03:00,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 237 transitions. [2021-05-02 23:03:00,216 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 237 transitions. Word has length 230 [2021-05-02 23:03:00,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:03:00,216 INFO L480 AbstractCegarLoop]: Abstraction has 236 states and 237 transitions. [2021-05-02 23:03:00,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.0416666666666665) internal successors, (98), 47 states have internal predecessors, (98), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:03:00,216 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 237 transitions. [2021-05-02 23:03:00,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-05-02 23:03:00,217 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:03:00,217 INFO L523 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:03:00,218 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-05-02 23:03:00,218 INFO L428 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:03:00,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:03:00,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1334717325, now seen corresponding path program 45 times [2021-05-02 23:03:00,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:03:00,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145389757] [2021-05-02 23:03:00,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:03:00,223 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:00,224 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:03:00,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:01,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:03:01,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:01,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:03:01,489 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:03:01,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145389757] [2021-05-02 23:03:01,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [145389757] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:03:01,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:03:01,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2021-05-02 23:03:01,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983942756] [2021-05-02 23:03:01,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-02 23:03:01,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:03:01,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-02 23:03:01,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2212, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 23:03:01,491 INFO L87 Difference]: Start difference. First operand 236 states and 237 transitions. Second operand has 49 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 48 states have internal predecessors, (100), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:03:04,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:03:04,890 INFO L93 Difference]: Finished difference Result 383 states and 386 transitions. [2021-05-02 23:03:04,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-02 23:03:04,891 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 48 states have internal predecessors, (100), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 235 [2021-05-02 23:03:04,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:03:04,891 INFO L225 Difference]: With dead ends: 383 [2021-05-02 23:03:04,891 INFO L226 Difference]: Without dead ends: 244 [2021-05-02 23:03:04,892 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1149.6ms TimeCoverageRelationStatistics Valid=145, Invalid=2305, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 23:03:04,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-05-02 23:03:04,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 241. [2021-05-02 23:03:04,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 237 states have (on average 1.0084388185654007) internal successors, (239), 237 states have internal predecessors, (239), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:03:04,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 242 transitions. [2021-05-02 23:03:04,897 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 242 transitions. Word has length 235 [2021-05-02 23:03:04,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:03:04,897 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 242 transitions. [2021-05-02 23:03:04,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 48 states have internal predecessors, (100), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:03:04,897 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 242 transitions. [2021-05-02 23:03:04,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-05-02 23:03:04,898 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:03:04,898 INFO L523 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:03:04,898 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-05-02 23:03:04,898 INFO L428 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:03:04,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:03:04,898 INFO L82 PathProgramCache]: Analyzing trace with hash 556708300, now seen corresponding path program 46 times [2021-05-02 23:03:04,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:03:04,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1414460521] [2021-05-02 23:03:04,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:03:04,904 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:04,904 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:03:04,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:06,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:03:06,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:06,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:03:06,207 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:03:06,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1414460521] [2021-05-02 23:03:06,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1414460521] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:03:06,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:03:06,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2021-05-02 23:03:06,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347506680] [2021-05-02 23:03:06,207 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-02 23:03:06,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:03:06,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-02 23:03:06,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2307, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 23:03:06,208 INFO L87 Difference]: Start difference. First operand 241 states and 242 transitions. Second operand has 50 states, 50 states have (on average 2.04) internal successors, (102), 49 states have internal predecessors, (102), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:03:09,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:03:09,717 INFO L93 Difference]: Finished difference Result 391 states and 394 transitions. [2021-05-02 23:03:09,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-02 23:03:09,718 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.04) internal successors, (102), 49 states have internal predecessors, (102), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 240 [2021-05-02 23:03:09,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:03:09,718 INFO L225 Difference]: With dead ends: 391 [2021-05-02 23:03:09,718 INFO L226 Difference]: Without dead ends: 249 [2021-05-02 23:03:09,719 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1196.0ms TimeCoverageRelationStatistics Valid=148, Invalid=2402, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 23:03:09,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-05-02 23:03:09,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 246. [2021-05-02 23:03:09,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 242 states have (on average 1.0082644628099173) internal successors, (244), 242 states have internal predecessors, (244), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:03:09,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 247 transitions. [2021-05-02 23:03:09,725 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 247 transitions. Word has length 240 [2021-05-02 23:03:09,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:03:09,726 INFO L480 AbstractCegarLoop]: Abstraction has 246 states and 247 transitions. [2021-05-02 23:03:09,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.04) internal successors, (102), 49 states have internal predecessors, (102), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:03:09,726 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 247 transitions. [2021-05-02 23:03:09,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2021-05-02 23:03:09,727 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:03:09,727 INFO L523 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:03:09,727 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-05-02 23:03:09,727 INFO L428 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:03:09,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:03:09,728 INFO L82 PathProgramCache]: Analyzing trace with hash -956826967, now seen corresponding path program 47 times [2021-05-02 23:03:09,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:03:09,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [594045612] [2021-05-02 23:03:09,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:03:09,733 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:09,734 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:03:09,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:11,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:03:11,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:11,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:03:11,058 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:03:11,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [594045612] [2021-05-02 23:03:11,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [594045612] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:03:11,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:03:11,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2021-05-02 23:03:11,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910092494] [2021-05-02 23:03:11,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-02 23:03:11,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:03:11,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-02 23:03:11,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2404, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 23:03:11,059 INFO L87 Difference]: Start difference. First operand 246 states and 247 transitions. Second operand has 51 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 50 states have internal predecessors, (104), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:03:14,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:03:14,756 INFO L93 Difference]: Finished difference Result 399 states and 402 transitions. [2021-05-02 23:03:14,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-02 23:03:14,756 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 50 states have internal predecessors, (104), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 245 [2021-05-02 23:03:14,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:03:14,757 INFO L225 Difference]: With dead ends: 399 [2021-05-02 23:03:14,757 INFO L226 Difference]: Without dead ends: 254 [2021-05-02 23:03:14,757 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1204.8ms TimeCoverageRelationStatistics Valid=151, Invalid=2501, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 23:03:14,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-05-02 23:03:14,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 251. [2021-05-02 23:03:14,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 247 states have (on average 1.008097165991903) internal successors, (249), 247 states have internal predecessors, (249), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:03:14,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 252 transitions. [2021-05-02 23:03:14,764 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 252 transitions. Word has length 245 [2021-05-02 23:03:14,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:03:14,764 INFO L480 AbstractCegarLoop]: Abstraction has 251 states and 252 transitions. [2021-05-02 23:03:14,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 50 states have internal predecessors, (104), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:03:14,765 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 252 transitions. [2021-05-02 23:03:14,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-05-02 23:03:14,766 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:03:14,766 INFO L523 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:03:14,766 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-05-02 23:03:14,766 INFO L428 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:03:14,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:03:14,766 INFO L82 PathProgramCache]: Analyzing trace with hash -419493200, now seen corresponding path program 48 times [2021-05-02 23:03:14,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:03:14,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [543993622] [2021-05-02 23:03:14,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:03:14,771 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:14,772 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:03:14,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:16,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:03:16,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:16,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:03:16,172 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:03:16,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [543993622] [2021-05-02 23:03:16,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [543993622] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:03:16,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:03:16,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2021-05-02 23:03:16,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676412492] [2021-05-02 23:03:16,172 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-02 23:03:16,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:03:16,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-02 23:03:16,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2503, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 23:03:16,173 INFO L87 Difference]: Start difference. First operand 251 states and 252 transitions. Second operand has 52 states, 52 states have (on average 2.0384615384615383) internal successors, (106), 51 states have internal predecessors, (106), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:03:19,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:03:19,996 INFO L93 Difference]: Finished difference Result 407 states and 410 transitions. [2021-05-02 23:03:19,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-02 23:03:19,997 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0384615384615383) internal successors, (106), 51 states have internal predecessors, (106), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 250 [2021-05-02 23:03:19,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:03:19,997 INFO L225 Difference]: With dead ends: 407 [2021-05-02 23:03:19,998 INFO L226 Difference]: Without dead ends: 259 [2021-05-02 23:03:19,998 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1245.7ms TimeCoverageRelationStatistics Valid=154, Invalid=2602, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 23:03:19,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-05-02 23:03:20,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 256. [2021-05-02 23:03:20,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 252 states have (on average 1.007936507936508) internal successors, (254), 252 states have internal predecessors, (254), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:03:20,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 257 transitions. [2021-05-02 23:03:20,005 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 257 transitions. Word has length 250 [2021-05-02 23:03:20,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:03:20,005 INFO L480 AbstractCegarLoop]: Abstraction has 256 states and 257 transitions. [2021-05-02 23:03:20,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 2.0384615384615383) internal successors, (106), 51 states have internal predecessors, (106), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:03:20,006 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 257 transitions. [2021-05-02 23:03:20,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-05-02 23:03:20,007 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:03:20,007 INFO L523 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:03:20,007 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-05-02 23:03:20,007 INFO L428 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:03:20,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:03:20,008 INFO L82 PathProgramCache]: Analyzing trace with hash 396421573, now seen corresponding path program 49 times [2021-05-02 23:03:20,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:03:20,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [461676188] [2021-05-02 23:03:20,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:03:20,012 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:20,013 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:03:20,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:21,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:03:21,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:21,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:03:21,540 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:03:21,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [461676188] [2021-05-02 23:03:21,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [461676188] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:03:21,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:03:21,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2021-05-02 23:03:21,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276756818] [2021-05-02 23:03:21,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-02 23:03:21,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:03:21,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-02 23:03:21,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=2604, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 23:03:21,542 INFO L87 Difference]: Start difference. First operand 256 states and 257 transitions. Second operand has 53 states, 53 states have (on average 2.0377358490566038) internal successors, (108), 52 states have internal predecessors, (108), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:03:25,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:03:25,570 INFO L93 Difference]: Finished difference Result 415 states and 418 transitions. [2021-05-02 23:03:25,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-02 23:03:25,571 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.0377358490566038) internal successors, (108), 52 states have internal predecessors, (108), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 255 [2021-05-02 23:03:25,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:03:25,572 INFO L225 Difference]: With dead ends: 415 [2021-05-02 23:03:25,572 INFO L226 Difference]: Without dead ends: 264 [2021-05-02 23:03:25,572 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1316.7ms TimeCoverageRelationStatistics Valid=157, Invalid=2705, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 23:03:25,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-05-02 23:03:25,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 261. [2021-05-02 23:03:25,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 257 states have (on average 1.0077821011673151) internal successors, (259), 257 states have internal predecessors, (259), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:03:25,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 262 transitions. [2021-05-02 23:03:25,579 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 262 transitions. Word has length 255 [2021-05-02 23:03:25,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:03:25,579 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 262 transitions. [2021-05-02 23:03:25,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 2.0377358490566038) internal successors, (108), 52 states have internal predecessors, (108), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:03:25,579 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 262 transitions. [2021-05-02 23:03:25,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2021-05-02 23:03:25,580 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:03:25,580 INFO L523 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:03:25,580 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-05-02 23:03:25,580 INFO L428 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:03:25,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:03:25,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1216781420, now seen corresponding path program 50 times [2021-05-02 23:03:25,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:03:25,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [829526276] [2021-05-02 23:03:25,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:03:25,586 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:25,586 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:03:25,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:27,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:03:27,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:27,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:03:27,112 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:03:27,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [829526276] [2021-05-02 23:03:27,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [829526276] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:03:27,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:03:27,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2021-05-02 23:03:27,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917615255] [2021-05-02 23:03:27,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-02 23:03:27,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:03:27,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-02 23:03:27,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=2707, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 23:03:27,113 INFO L87 Difference]: Start difference. First operand 261 states and 262 transitions. Second operand has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 53 states have internal predecessors, (110), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:03:31,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:03:31,294 INFO L93 Difference]: Finished difference Result 423 states and 426 transitions. [2021-05-02 23:03:31,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-02 23:03:31,301 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 53 states have internal predecessors, (110), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 260 [2021-05-02 23:03:31,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:03:31,302 INFO L225 Difference]: With dead ends: 423 [2021-05-02 23:03:31,302 INFO L226 Difference]: Without dead ends: 269 [2021-05-02 23:03:31,303 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1335.2ms TimeCoverageRelationStatistics Valid=160, Invalid=2810, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 23:03:31,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-05-02 23:03:31,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 266. [2021-05-02 23:03:31,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 262 states have (on average 1.0076335877862594) internal successors, (264), 262 states have internal predecessors, (264), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:03:31,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 267 transitions. [2021-05-02 23:03:31,308 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 267 transitions. Word has length 260 [2021-05-02 23:03:31,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:03:31,308 INFO L480 AbstractCegarLoop]: Abstraction has 266 states and 267 transitions. [2021-05-02 23:03:31,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 53 states have internal predecessors, (110), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:03:31,308 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 267 transitions. [2021-05-02 23:03:31,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-05-02 23:03:31,309 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:03:31,309 INFO L523 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:03:31,309 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-05-02 23:03:31,309 INFO L428 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:03:31,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:03:31,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1126778655, now seen corresponding path program 51 times [2021-05-02 23:03:31,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:03:31,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635174066] [2021-05-02 23:03:31,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:03:31,318 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:31,319 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:03:31,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:32,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:03:32,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:32,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:03:32,919 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:03:32,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635174066] [2021-05-02 23:03:32,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1635174066] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:03:32,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:03:32,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2021-05-02 23:03:32,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746158021] [2021-05-02 23:03:32,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-05-02 23:03:32,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:03:32,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-05-02 23:03:32,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=2812, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 23:03:32,921 INFO L87 Difference]: Start difference. First operand 266 states and 267 transitions. Second operand has 55 states, 55 states have (on average 2.036363636363636) internal successors, (112), 54 states have internal predecessors, (112), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:03:37,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:03:37,278 INFO L93 Difference]: Finished difference Result 431 states and 434 transitions. [2021-05-02 23:03:37,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-02 23:03:37,278 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.036363636363636) internal successors, (112), 54 states have internal predecessors, (112), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 265 [2021-05-02 23:03:37,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:03:37,279 INFO L225 Difference]: With dead ends: 431 [2021-05-02 23:03:37,279 INFO L226 Difference]: Without dead ends: 274 [2021-05-02 23:03:37,280 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1421.9ms TimeCoverageRelationStatistics Valid=163, Invalid=2917, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 23:03:37,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-05-02 23:03:37,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 271. [2021-05-02 23:03:37,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 267 states have (on average 1.0074906367041199) internal successors, (269), 267 states have internal predecessors, (269), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:03:37,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 272 transitions. [2021-05-02 23:03:37,286 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 272 transitions. Word has length 265 [2021-05-02 23:03:37,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:03:37,287 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 272 transitions. [2021-05-02 23:03:37,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 2.036363636363636) internal successors, (112), 54 states have internal predecessors, (112), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:03:37,287 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 272 transitions. [2021-05-02 23:03:37,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2021-05-02 23:03:37,288 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:03:37,288 INFO L523 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:03:37,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-05-02 23:03:37,288 INFO L428 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:03:37,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:03:37,289 INFO L82 PathProgramCache]: Analyzing trace with hash -577766280, now seen corresponding path program 52 times [2021-05-02 23:03:37,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:03:37,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691149412] [2021-05-02 23:03:37,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:03:37,295 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:37,296 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:03:37,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:38,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:03:38,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:38,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:03:38,963 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:03:38,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691149412] [2021-05-02 23:03:38,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [691149412] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:03:38,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:03:38,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2021-05-02 23:03:38,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108527065] [2021-05-02 23:03:38,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-02 23:03:38,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:03:38,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-02 23:03:38,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2919, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 23:03:38,965 INFO L87 Difference]: Start difference. First operand 271 states and 272 transitions. Second operand has 56 states, 56 states have (on average 2.0357142857142856) internal successors, (114), 55 states have internal predecessors, (114), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:03:43,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:03:43,514 INFO L93 Difference]: Finished difference Result 439 states and 442 transitions. [2021-05-02 23:03:43,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-02 23:03:43,515 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0357142857142856) internal successors, (114), 55 states have internal predecessors, (114), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 270 [2021-05-02 23:03:43,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:03:43,516 INFO L225 Difference]: With dead ends: 439 [2021-05-02 23:03:43,516 INFO L226 Difference]: Without dead ends: 279 [2021-05-02 23:03:43,516 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1434.2ms TimeCoverageRelationStatistics Valid=166, Invalid=3026, Unknown=0, NotChecked=0, Total=3192 [2021-05-02 23:03:43,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-05-02 23:03:43,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 276. [2021-05-02 23:03:43,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 272 states have (on average 1.0073529411764706) internal successors, (274), 272 states have internal predecessors, (274), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:03:43,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 277 transitions. [2021-05-02 23:03:43,523 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 277 transitions. Word has length 270 [2021-05-02 23:03:43,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:03:43,523 INFO L480 AbstractCegarLoop]: Abstraction has 276 states and 277 transitions. [2021-05-02 23:03:43,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 56 states, 56 states have (on average 2.0357142857142856) internal successors, (114), 55 states have internal predecessors, (114), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:03:43,524 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 277 transitions. [2021-05-02 23:03:43,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2021-05-02 23:03:43,525 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:03:43,525 INFO L523 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:03:43,525 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-05-02 23:03:43,525 INFO L428 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:03:43,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:03:43,525 INFO L82 PathProgramCache]: Analyzing trace with hash 208087037, now seen corresponding path program 53 times [2021-05-02 23:03:43,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:03:43,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1983995880] [2021-05-02 23:03:43,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:03:43,530 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:43,531 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:03:43,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:45,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:03:45,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:45,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:03:45,202 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:03:45,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1983995880] [2021-05-02 23:03:45,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1983995880] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:03:45,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:03:45,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2021-05-02 23:03:45,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707281749] [2021-05-02 23:03:45,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-05-02 23:03:45,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:03:45,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-05-02 23:03:45,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=3028, Unknown=0, NotChecked=0, Total=3192 [2021-05-02 23:03:45,203 INFO L87 Difference]: Start difference. First operand 276 states and 277 transitions. Second operand has 57 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 56 states have internal predecessors, (116), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:03:49,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:03:49,943 INFO L93 Difference]: Finished difference Result 447 states and 450 transitions. [2021-05-02 23:03:49,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-02 23:03:49,943 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 56 states have internal predecessors, (116), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 275 [2021-05-02 23:03:49,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:03:49,944 INFO L225 Difference]: With dead ends: 447 [2021-05-02 23:03:49,944 INFO L226 Difference]: Without dead ends: 284 [2021-05-02 23:03:49,945 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1496.6ms TimeCoverageRelationStatistics Valid=169, Invalid=3137, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 23:03:49,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-05-02 23:03:49,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 281. [2021-05-02 23:03:49,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 277 states have (on average 1.0072202166064983) internal successors, (279), 277 states have internal predecessors, (279), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:03:49,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 282 transitions. [2021-05-02 23:03:49,949 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 282 transitions. Word has length 275 [2021-05-02 23:03:49,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:03:49,949 INFO L480 AbstractCegarLoop]: Abstraction has 281 states and 282 transitions. [2021-05-02 23:03:49,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 56 states have internal predecessors, (116), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:03:49,949 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 282 transitions. [2021-05-02 23:03:49,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2021-05-02 23:03:49,950 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:03:49,950 INFO L523 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:03:49,951 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-05-02 23:03:49,951 INFO L428 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:03:49,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:03:49,951 INFO L82 PathProgramCache]: Analyzing trace with hash -72018596, now seen corresponding path program 54 times [2021-05-02 23:03:49,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:03:49,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [846877058] [2021-05-02 23:03:49,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:03:49,963 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:49,964 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:03:50,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:51,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:03:51,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:51,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:03:51,838 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:03:51,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [846877058] [2021-05-02 23:03:51,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [846877058] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:03:51,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:03:51,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2021-05-02 23:03:51,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652015897] [2021-05-02 23:03:51,838 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-05-02 23:03:51,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:03:51,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-05-02 23:03:51,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=3139, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 23:03:51,839 INFO L87 Difference]: Start difference. First operand 281 states and 282 transitions. Second operand has 58 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 57 states have internal predecessors, (118), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:03:56,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:03:56,721 INFO L93 Difference]: Finished difference Result 455 states and 458 transitions. [2021-05-02 23:03:56,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-02 23:03:56,722 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 57 states have internal predecessors, (118), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 280 [2021-05-02 23:03:56,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:03:56,722 INFO L225 Difference]: With dead ends: 455 [2021-05-02 23:03:56,722 INFO L226 Difference]: Without dead ends: 289 [2021-05-02 23:03:56,723 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1622.5ms TimeCoverageRelationStatistics Valid=172, Invalid=3250, Unknown=0, NotChecked=0, Total=3422 [2021-05-02 23:03:56,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-05-02 23:03:56,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 286. [2021-05-02 23:03:56,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 282 states have (on average 1.0070921985815602) internal successors, (284), 282 states have internal predecessors, (284), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:03:56,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 287 transitions. [2021-05-02 23:03:56,728 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 287 transitions. Word has length 280 [2021-05-02 23:03:56,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:03:56,728 INFO L480 AbstractCegarLoop]: Abstraction has 286 states and 287 transitions. [2021-05-02 23:03:56,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 57 states have internal predecessors, (118), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:03:56,728 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 287 transitions. [2021-05-02 23:03:56,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2021-05-02 23:03:56,729 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:03:56,730 INFO L523 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:03:56,730 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-05-02 23:03:56,730 INFO L428 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:03:56,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:03:56,730 INFO L82 PathProgramCache]: Analyzing trace with hash -761268455, now seen corresponding path program 55 times [2021-05-02 23:03:56,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:03:56,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702672764] [2021-05-02 23:03:56,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:03:56,735 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:56,736 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:03:56,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:58,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:03:58,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:58,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:03:58,578 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:03:58,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702672764] [2021-05-02 23:03:58,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1702672764] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:03:58,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:03:58,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2021-05-02 23:03:58,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566381310] [2021-05-02 23:03:58,579 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-05-02 23:03:58,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:03:58,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-05-02 23:03:58,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=3252, Unknown=0, NotChecked=0, Total=3422 [2021-05-02 23:03:58,579 INFO L87 Difference]: Start difference. First operand 286 states and 287 transitions. Second operand has 59 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 58 states have internal predecessors, (120), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:04:03,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:04:03,691 INFO L93 Difference]: Finished difference Result 463 states and 466 transitions. [2021-05-02 23:04:03,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-02 23:04:03,691 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 58 states have internal predecessors, (120), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 285 [2021-05-02 23:04:03,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:04:03,692 INFO L225 Difference]: With dead ends: 463 [2021-05-02 23:04:03,692 INFO L226 Difference]: Without dead ends: 294 [2021-05-02 23:04:03,693 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1598.0ms TimeCoverageRelationStatistics Valid=175, Invalid=3365, Unknown=0, NotChecked=0, Total=3540 [2021-05-02 23:04:03,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-05-02 23:04:03,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 291. [2021-05-02 23:04:03,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 287 states have (on average 1.0069686411149825) internal successors, (289), 287 states have internal predecessors, (289), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:04:03,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 292 transitions. [2021-05-02 23:04:03,699 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 292 transitions. Word has length 285 [2021-05-02 23:04:03,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:04:03,700 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 292 transitions. [2021-05-02 23:04:03,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 59 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 58 states have internal predecessors, (120), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:04:03,700 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 292 transitions. [2021-05-02 23:04:03,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2021-05-02 23:04:03,701 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:04:03,701 INFO L523 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:04:03,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-05-02 23:04:03,701 INFO L428 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:04:03,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:04:03,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1876618816, now seen corresponding path program 56 times [2021-05-02 23:04:03,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:04:03,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935616170] [2021-05-02 23:04:03,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:04:03,707 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:03,707 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:04:03,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:05,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:04:05,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:05,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:04:05,562 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:04:05,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1935616170] [2021-05-02 23:04:05,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1935616170] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:04:05,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:04:05,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2021-05-02 23:04:05,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131745739] [2021-05-02 23:04:05,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-05-02 23:04:05,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:04:05,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-05-02 23:04:05,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=3367, Unknown=0, NotChecked=0, Total=3540 [2021-05-02 23:04:05,563 INFO L87 Difference]: Start difference. First operand 291 states and 292 transitions. Second operand has 60 states, 60 states have (on average 2.033333333333333) internal successors, (122), 59 states have internal predecessors, (122), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:04:10,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:04:10,853 INFO L93 Difference]: Finished difference Result 471 states and 474 transitions. [2021-05-02 23:04:10,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-02 23:04:10,853 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.033333333333333) internal successors, (122), 59 states have internal predecessors, (122), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 290 [2021-05-02 23:04:10,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:04:10,854 INFO L225 Difference]: With dead ends: 471 [2021-05-02 23:04:10,854 INFO L226 Difference]: Without dead ends: 299 [2021-05-02 23:04:10,854 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1656.9ms TimeCoverageRelationStatistics Valid=178, Invalid=3482, Unknown=0, NotChecked=0, Total=3660 [2021-05-02 23:04:10,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-05-02 23:04:10,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 296. [2021-05-02 23:04:10,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 292 states have (on average 1.0068493150684932) internal successors, (294), 292 states have internal predecessors, (294), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:04:10,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 297 transitions. [2021-05-02 23:04:10,867 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 297 transitions. Word has length 290 [2021-05-02 23:04:10,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:04:10,867 INFO L480 AbstractCegarLoop]: Abstraction has 296 states and 297 transitions. [2021-05-02 23:04:10,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 2.033333333333333) internal successors, (122), 59 states have internal predecessors, (122), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:04:10,868 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 297 transitions. [2021-05-02 23:04:10,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2021-05-02 23:04:10,869 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:04:10,869 INFO L523 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:04:10,869 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-05-02 23:04:10,869 INFO L428 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:04:10,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:04:10,870 INFO L82 PathProgramCache]: Analyzing trace with hash -296819147, now seen corresponding path program 57 times [2021-05-02 23:04:10,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:04:10,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675653978] [2021-05-02 23:04:10,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:04:10,875 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:10,876 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:04:11,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:12,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:04:12,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:12,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:04:12,810 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:04:12,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675653978] [2021-05-02 23:04:12,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1675653978] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:04:12,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:04:12,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2021-05-02 23:04:12,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267200871] [2021-05-02 23:04:12,811 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-05-02 23:04:12,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:04:12,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-05-02 23:04:12,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=3484, Unknown=0, NotChecked=0, Total=3660 [2021-05-02 23:04:12,811 INFO L87 Difference]: Start difference. First operand 296 states and 297 transitions. Second operand has 61 states, 61 states have (on average 2.0327868852459017) internal successors, (124), 60 states have internal predecessors, (124), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:04:18,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:04:18,315 INFO L93 Difference]: Finished difference Result 479 states and 482 transitions. [2021-05-02 23:04:18,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-02 23:04:18,315 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.0327868852459017) internal successors, (124), 60 states have internal predecessors, (124), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 295 [2021-05-02 23:04:18,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:04:18,316 INFO L225 Difference]: With dead ends: 479 [2021-05-02 23:04:18,316 INFO L226 Difference]: Without dead ends: 304 [2021-05-02 23:04:18,317 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1724.1ms TimeCoverageRelationStatistics Valid=181, Invalid=3601, Unknown=0, NotChecked=0, Total=3782 [2021-05-02 23:04:18,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-05-02 23:04:18,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 301. [2021-05-02 23:04:18,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 297 states have (on average 1.0067340067340067) internal successors, (299), 297 states have internal predecessors, (299), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:04:18,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 302 transitions. [2021-05-02 23:04:18,321 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 302 transitions. Word has length 295 [2021-05-02 23:04:18,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:04:18,322 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 302 transitions. [2021-05-02 23:04:18,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 61 states, 61 states have (on average 2.0327868852459017) internal successors, (124), 60 states have internal predecessors, (124), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:04:18,322 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 302 transitions. [2021-05-02 23:04:18,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2021-05-02 23:04:18,323 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:04:18,323 INFO L523 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:04:18,323 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-05-02 23:04:18,323 INFO L428 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:04:18,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:04:18,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1217149148, now seen corresponding path program 58 times [2021-05-02 23:04:18,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:04:18,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757261126] [2021-05-02 23:04:18,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:04:18,331 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:18,331 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:04:18,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:20,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:04:20,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:20,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:04:20,325 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:04:20,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757261126] [2021-05-02 23:04:20,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [757261126] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:04:20,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:04:20,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2021-05-02 23:04:20,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921360039] [2021-05-02 23:04:20,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-05-02 23:04:20,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:04:20,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-05-02 23:04:20,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=3603, Unknown=0, NotChecked=0, Total=3782 [2021-05-02 23:04:20,326 INFO L87 Difference]: Start difference. First operand 301 states and 302 transitions. Second operand has 62 states, 62 states have (on average 2.032258064516129) internal successors, (126), 61 states have internal predecessors, (126), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:04:26,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:04:26,092 INFO L93 Difference]: Finished difference Result 487 states and 490 transitions. [2021-05-02 23:04:26,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-02 23:04:26,093 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.032258064516129) internal successors, (126), 61 states have internal predecessors, (126), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 300 [2021-05-02 23:04:26,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:04:26,094 INFO L225 Difference]: With dead ends: 487 [2021-05-02 23:04:26,094 INFO L226 Difference]: Without dead ends: 309 [2021-05-02 23:04:26,094 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1761.7ms TimeCoverageRelationStatistics Valid=184, Invalid=3722, Unknown=0, NotChecked=0, Total=3906 [2021-05-02 23:04:26,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-05-02 23:04:26,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 306. [2021-05-02 23:04:26,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 302 states have (on average 1.0066225165562914) internal successors, (304), 302 states have internal predecessors, (304), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:04:26,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 307 transitions. [2021-05-02 23:04:26,102 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 307 transitions. Word has length 300 [2021-05-02 23:04:26,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:04:26,102 INFO L480 AbstractCegarLoop]: Abstraction has 306 states and 307 transitions. [2021-05-02 23:04:26,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 62 states, 62 states have (on average 2.032258064516129) internal successors, (126), 61 states have internal predecessors, (126), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:04:26,102 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 307 transitions. [2021-05-02 23:04:26,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2021-05-02 23:04:26,103 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:04:26,104 INFO L523 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:04:26,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-05-02 23:04:26,104 INFO L428 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:04:26,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:04:26,104 INFO L82 PathProgramCache]: Analyzing trace with hash -322849455, now seen corresponding path program 59 times [2021-05-02 23:04:26,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:04:26,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1651467229] [2021-05-02 23:04:26,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:04:26,109 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:26,109 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:04:26,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:28,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:04:28,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:28,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:04:28,202 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:04:28,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1651467229] [2021-05-02 23:04:28,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1651467229] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:04:28,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:04:28,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2021-05-02 23:04:28,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680755196] [2021-05-02 23:04:28,203 INFO L460 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-05-02 23:04:28,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:04:28,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-05-02 23:04:28,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=3724, Unknown=0, NotChecked=0, Total=3906 [2021-05-02 23:04:28,203 INFO L87 Difference]: Start difference. First operand 306 states and 307 transitions. Second operand has 63 states, 63 states have (on average 2.0317460317460316) internal successors, (128), 62 states have internal predecessors, (128), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:04:34,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:04:34,120 INFO L93 Difference]: Finished difference Result 495 states and 498 transitions. [2021-05-02 23:04:34,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-02 23:04:34,121 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0317460317460316) internal successors, (128), 62 states have internal predecessors, (128), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 305 [2021-05-02 23:04:34,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:04:34,121 INFO L225 Difference]: With dead ends: 495 [2021-05-02 23:04:34,121 INFO L226 Difference]: Without dead ends: 314 [2021-05-02 23:04:34,122 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1882.6ms TimeCoverageRelationStatistics Valid=187, Invalid=3845, Unknown=0, NotChecked=0, Total=4032 [2021-05-02 23:04:34,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-05-02 23:04:34,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 311. [2021-05-02 23:04:34,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 307 states have (on average 1.006514657980456) internal successors, (309), 307 states have internal predecessors, (309), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:04:34,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 312 transitions. [2021-05-02 23:04:34,130 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 312 transitions. Word has length 305 [2021-05-02 23:04:34,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:04:34,130 INFO L480 AbstractCegarLoop]: Abstraction has 311 states and 312 transitions. [2021-05-02 23:04:34,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 63 states, 63 states have (on average 2.0317460317460316) internal successors, (128), 62 states have internal predecessors, (128), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:04:34,130 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 312 transitions. [2021-05-02 23:04:34,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2021-05-02 23:04:34,131 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:04:34,131 INFO L523 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:04:34,132 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-05-02 23:04:34,132 INFO L428 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:04:34,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:04:34,132 INFO L82 PathProgramCache]: Analyzing trace with hash -747511800, now seen corresponding path program 60 times [2021-05-02 23:04:34,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:04:34,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066813483] [2021-05-02 23:04:34,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:04:34,138 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:34,139 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:04:34,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:36,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:04:36,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:36,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:04:36,265 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:04:36,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066813483] [2021-05-02 23:04:36,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2066813483] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:04:36,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:04:36,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2021-05-02 23:04:36,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586989932] [2021-05-02 23:04:36,265 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-05-02 23:04:36,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:04:36,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-05-02 23:04:36,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=3847, Unknown=0, NotChecked=0, Total=4032 [2021-05-02 23:04:36,266 INFO L87 Difference]: Start difference. First operand 311 states and 312 transitions. Second operand has 64 states, 64 states have (on average 2.03125) internal successors, (130), 63 states have internal predecessors, (130), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:04:42,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:04:42,407 INFO L93 Difference]: Finished difference Result 503 states and 506 transitions. [2021-05-02 23:04:42,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-02 23:04:42,407 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.03125) internal successors, (130), 63 states have internal predecessors, (130), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 310 [2021-05-02 23:04:42,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:04:42,408 INFO L225 Difference]: With dead ends: 503 [2021-05-02 23:04:42,408 INFO L226 Difference]: Without dead ends: 319 [2021-05-02 23:04:42,408 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1880.9ms TimeCoverageRelationStatistics Valid=190, Invalid=3970, Unknown=0, NotChecked=0, Total=4160 [2021-05-02 23:04:42,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-05-02 23:04:42,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 316. [2021-05-02 23:04:42,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 312 states have (on average 1.0064102564102564) internal successors, (314), 312 states have internal predecessors, (314), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:04:42,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 317 transitions. [2021-05-02 23:04:42,416 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 317 transitions. Word has length 310 [2021-05-02 23:04:42,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:04:42,416 INFO L480 AbstractCegarLoop]: Abstraction has 316 states and 317 transitions. [2021-05-02 23:04:42,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 64 states, 64 states have (on average 2.03125) internal successors, (130), 63 states have internal predecessors, (130), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:04:42,416 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 317 transitions. [2021-05-02 23:04:42,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2021-05-02 23:04:42,418 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:04:42,418 INFO L523 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:04:42,418 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-05-02 23:04:42,418 INFO L428 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:04:42,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:04:42,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1513741203, now seen corresponding path program 61 times [2021-05-02 23:04:42,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:04:42,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [283296623] [2021-05-02 23:04:42,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:04:42,422 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:42,423 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:04:42,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:44,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:04:44,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:44,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:04:44,618 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:04:44,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [283296623] [2021-05-02 23:04:44,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [283296623] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:04:44,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:04:44,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2021-05-02 23:04:44,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39792966] [2021-05-02 23:04:44,619 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states [2021-05-02 23:04:44,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:04:44,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-05-02 23:04:44,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=3972, Unknown=0, NotChecked=0, Total=4160 [2021-05-02 23:04:44,619 INFO L87 Difference]: Start difference. First operand 316 states and 317 transitions. Second operand has 65 states, 65 states have (on average 2.0307692307692307) internal successors, (132), 64 states have internal predecessors, (132), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:04:50,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:04:50,955 INFO L93 Difference]: Finished difference Result 511 states and 514 transitions. [2021-05-02 23:04:50,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-02 23:04:50,956 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.0307692307692307) internal successors, (132), 64 states have internal predecessors, (132), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 315 [2021-05-02 23:04:50,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:04:50,956 INFO L225 Difference]: With dead ends: 511 [2021-05-02 23:04:50,956 INFO L226 Difference]: Without dead ends: 324 [2021-05-02 23:04:50,957 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1981.5ms TimeCoverageRelationStatistics Valid=193, Invalid=4097, Unknown=0, NotChecked=0, Total=4290 [2021-05-02 23:04:50,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-05-02 23:04:50,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 321. [2021-05-02 23:04:50,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 317 states have (on average 1.0063091482649842) internal successors, (319), 317 states have internal predecessors, (319), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:04:50,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 322 transitions. [2021-05-02 23:04:50,962 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 322 transitions. Word has length 315 [2021-05-02 23:04:50,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:04:50,962 INFO L480 AbstractCegarLoop]: Abstraction has 321 states and 322 transitions. [2021-05-02 23:04:50,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 65 states, 65 states have (on average 2.0307692307692307) internal successors, (132), 64 states have internal predecessors, (132), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:04:50,963 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 322 transitions. [2021-05-02 23:04:50,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2021-05-02 23:04:50,964 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:04:50,964 INFO L523 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:04:50,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-05-02 23:04:50,964 INFO L428 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:04:50,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:04:50,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1404602132, now seen corresponding path program 62 times [2021-05-02 23:04:50,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:04:50,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922334449] [2021-05-02 23:04:50,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:04:50,976 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:50,977 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:04:51,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:53,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:04:53,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:53,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:04:53,157 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:04:53,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922334449] [2021-05-02 23:04:53,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [922334449] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:04:53,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:04:53,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2021-05-02 23:04:53,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074285523] [2021-05-02 23:04:53,158 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-05-02 23:04:53,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:04:53,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-05-02 23:04:53,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=4099, Unknown=0, NotChecked=0, Total=4290 [2021-05-02 23:04:53,159 INFO L87 Difference]: Start difference. First operand 321 states and 322 transitions. Second operand has 66 states, 66 states have (on average 2.0303030303030303) internal successors, (134), 65 states have internal predecessors, (134), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:04:59,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:04:59,736 INFO L93 Difference]: Finished difference Result 519 states and 522 transitions. [2021-05-02 23:04:59,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-02 23:04:59,736 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0303030303030303) internal successors, (134), 65 states have internal predecessors, (134), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 320 [2021-05-02 23:04:59,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:04:59,737 INFO L225 Difference]: With dead ends: 519 [2021-05-02 23:04:59,737 INFO L226 Difference]: Without dead ends: 329 [2021-05-02 23:04:59,738 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1968.0ms TimeCoverageRelationStatistics Valid=196, Invalid=4226, Unknown=0, NotChecked=0, Total=4422 [2021-05-02 23:04:59,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-05-02 23:04:59,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 326. [2021-05-02 23:04:59,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 322 states have (on average 1.0062111801242235) internal successors, (324), 322 states have internal predecessors, (324), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:04:59,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 327 transitions. [2021-05-02 23:04:59,744 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 327 transitions. Word has length 320 [2021-05-02 23:04:59,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:04:59,745 INFO L480 AbstractCegarLoop]: Abstraction has 326 states and 327 transitions. [2021-05-02 23:04:59,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 66 states, 66 states have (on average 2.0303030303030303) internal successors, (134), 65 states have internal predecessors, (134), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:04:59,745 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 327 transitions. [2021-05-02 23:04:59,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2021-05-02 23:04:59,746 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:04:59,746 INFO L523 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:04:59,746 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-05-02 23:04:59,747 INFO L428 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:04:59,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:04:59,747 INFO L82 PathProgramCache]: Analyzing trace with hash -676727927, now seen corresponding path program 63 times [2021-05-02 23:04:59,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:04:59,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1086676561] [2021-05-02 23:04:59,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:04:59,752 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:59,753 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:04:59,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:02,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:05:02,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:02,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:05:02,044 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:05:02,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1086676561] [2021-05-02 23:05:02,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1086676561] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:05:02,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:05:02,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2021-05-02 23:05:02,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018813619] [2021-05-02 23:05:02,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-05-02 23:05:02,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:05:02,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-05-02 23:05:02,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=4228, Unknown=0, NotChecked=0, Total=4422 [2021-05-02 23:05:02,046 INFO L87 Difference]: Start difference. First operand 326 states and 327 transitions. Second operand has 67 states, 67 states have (on average 2.029850746268657) internal successors, (136), 66 states have internal predecessors, (136), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:05:08,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:05:08,914 INFO L93 Difference]: Finished difference Result 527 states and 530 transitions. [2021-05-02 23:05:08,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-02 23:05:08,915 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.029850746268657) internal successors, (136), 66 states have internal predecessors, (136), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 325 [2021-05-02 23:05:08,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:05:08,916 INFO L225 Difference]: With dead ends: 527 [2021-05-02 23:05:08,916 INFO L226 Difference]: Without dead ends: 334 [2021-05-02 23:05:08,916 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2048.5ms TimeCoverageRelationStatistics Valid=199, Invalid=4357, Unknown=0, NotChecked=0, Total=4556 [2021-05-02 23:05:08,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-05-02 23:05:08,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 331. [2021-05-02 23:05:08,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 327 states have (on average 1.0061162079510704) internal successors, (329), 327 states have internal predecessors, (329), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:05:08,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 332 transitions. [2021-05-02 23:05:08,922 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 332 transitions. Word has length 325 [2021-05-02 23:05:08,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:05:08,922 INFO L480 AbstractCegarLoop]: Abstraction has 331 states and 332 transitions. [2021-05-02 23:05:08,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 67 states, 67 states have (on average 2.029850746268657) internal successors, (136), 66 states have internal predecessors, (136), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:05:08,922 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 332 transitions. [2021-05-02 23:05:08,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2021-05-02 23:05:08,923 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:05:08,923 INFO L523 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:05:08,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-05-02 23:05:08,924 INFO L428 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:05:08,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:05:08,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1978061264, now seen corresponding path program 64 times [2021-05-02 23:05:08,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:05:08,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [563886482] [2021-05-02 23:05:08,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:05:08,940 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:05:08,941 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:05:09,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:11,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:05:11,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:11,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:05:11,305 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:05:11,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [563886482] [2021-05-02 23:05:11,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [563886482] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:05:11,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:05:11,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2021-05-02 23:05:11,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738615181] [2021-05-02 23:05:11,305 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-05-02 23:05:11,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:05:11,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-05-02 23:05:11,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=4359, Unknown=0, NotChecked=0, Total=4556 [2021-05-02 23:05:11,306 INFO L87 Difference]: Start difference. First operand 331 states and 332 transitions. Second operand has 68 states, 68 states have (on average 2.0294117647058822) internal successors, (138), 67 states have internal predecessors, (138), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:05:18,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:05:18,383 INFO L93 Difference]: Finished difference Result 535 states and 538 transitions. [2021-05-02 23:05:18,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-02 23:05:18,384 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0294117647058822) internal successors, (138), 67 states have internal predecessors, (138), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 330 [2021-05-02 23:05:18,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:05:18,385 INFO L225 Difference]: With dead ends: 535 [2021-05-02 23:05:18,385 INFO L226 Difference]: Without dead ends: 339 [2021-05-02 23:05:18,385 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2118.4ms TimeCoverageRelationStatistics Valid=202, Invalid=4490, Unknown=0, NotChecked=0, Total=4692 [2021-05-02 23:05:18,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-05-02 23:05:18,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 336. [2021-05-02 23:05:18,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 332 states have (on average 1.0060240963855422) internal successors, (334), 332 states have internal predecessors, (334), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:05:18,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 337 transitions. [2021-05-02 23:05:18,391 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 337 transitions. Word has length 330 [2021-05-02 23:05:18,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:05:18,391 INFO L480 AbstractCegarLoop]: Abstraction has 336 states and 337 transitions. [2021-05-02 23:05:18,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 68 states, 68 states have (on average 2.0294117647058822) internal successors, (138), 67 states have internal predecessors, (138), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:05:18,391 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 337 transitions. [2021-05-02 23:05:18,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2021-05-02 23:05:18,392 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:05:18,392 INFO L523 BasicCegarLoop]: trace histogram [65, 65, 65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:05:18,392 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-05-02 23:05:18,392 INFO L428 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:05:18,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:05:18,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1019551067, now seen corresponding path program 65 times [2021-05-02 23:05:18,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:05:18,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1462164322] [2021-05-02 23:05:18,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:05:18,411 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:05:18,412 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:05:18,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:21,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:05:21,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:21,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:05:21,023 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:05:21,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1462164322] [2021-05-02 23:05:21,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1462164322] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:05:21,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:05:21,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2021-05-02 23:05:21,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218622911] [2021-05-02 23:05:21,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-05-02 23:05:21,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:05:21,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-05-02 23:05:21,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=4492, Unknown=0, NotChecked=0, Total=4692 [2021-05-02 23:05:21,025 INFO L87 Difference]: Start difference. First operand 336 states and 337 transitions. Second operand has 69 states, 69 states have (on average 2.028985507246377) internal successors, (140), 68 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:05:28,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:05:28,349 INFO L93 Difference]: Finished difference Result 543 states and 546 transitions. [2021-05-02 23:05:28,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-02 23:05:28,350 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.028985507246377) internal successors, (140), 68 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 335 [2021-05-02 23:05:28,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:05:28,351 INFO L225 Difference]: With dead ends: 543 [2021-05-02 23:05:28,351 INFO L226 Difference]: Without dead ends: 344 [2021-05-02 23:05:28,351 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2268.2ms TimeCoverageRelationStatistics Valid=205, Invalid=4625, Unknown=0, NotChecked=0, Total=4830 [2021-05-02 23:05:28,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-05-02 23:05:28,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 341. [2021-05-02 23:05:28,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 337 states have (on average 1.0059347181008902) internal successors, (339), 337 states have internal predecessors, (339), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:05:28,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 342 transitions. [2021-05-02 23:05:28,358 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 342 transitions. Word has length 335 [2021-05-02 23:05:28,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:05:28,358 INFO L480 AbstractCegarLoop]: Abstraction has 341 states and 342 transitions. [2021-05-02 23:05:28,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 69 states, 69 states have (on average 2.028985507246377) internal successors, (140), 68 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:05:28,358 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 342 transitions. [2021-05-02 23:05:28,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2021-05-02 23:05:28,360 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:05:28,360 INFO L523 BasicCegarLoop]: trace histogram [66, 66, 66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:05:28,360 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-05-02 23:05:28,360 INFO L428 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:05:28,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:05:28,360 INFO L82 PathProgramCache]: Analyzing trace with hash 331492020, now seen corresponding path program 66 times [2021-05-02 23:05:28,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:05:28,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1910447538] [2021-05-02 23:05:28,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:05:28,365 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:05:28,366 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:05:28,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:30,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:05:30,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:30,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:05:30,824 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:05:30,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1910447538] [2021-05-02 23:05:30,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1910447538] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:05:30,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:05:30,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2021-05-02 23:05:30,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644866055] [2021-05-02 23:05:30,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-05-02 23:05:30,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:05:30,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-05-02 23:05:30,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=4627, Unknown=0, NotChecked=0, Total=4830 [2021-05-02 23:05:30,825 INFO L87 Difference]: Start difference. First operand 341 states and 342 transitions. Second operand has 70 states, 70 states have (on average 2.0285714285714285) internal successors, (142), 69 states have internal predecessors, (142), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:05:38,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:05:38,451 INFO L93 Difference]: Finished difference Result 551 states and 554 transitions. [2021-05-02 23:05:38,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-05-02 23:05:38,451 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.0285714285714285) internal successors, (142), 69 states have internal predecessors, (142), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 340 [2021-05-02 23:05:38,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:05:38,452 INFO L225 Difference]: With dead ends: 551 [2021-05-02 23:05:38,452 INFO L226 Difference]: Without dead ends: 349 [2021-05-02 23:05:38,453 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2234.7ms TimeCoverageRelationStatistics Valid=208, Invalid=4762, Unknown=0, NotChecked=0, Total=4970 [2021-05-02 23:05:38,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-05-02 23:05:38,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 346. [2021-05-02 23:05:38,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 342 states have (on average 1.0058479532163742) internal successors, (344), 342 states have internal predecessors, (344), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:05:38,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 347 transitions. [2021-05-02 23:05:38,458 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 347 transitions. Word has length 340 [2021-05-02 23:05:38,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:05:38,459 INFO L480 AbstractCegarLoop]: Abstraction has 346 states and 347 transitions. [2021-05-02 23:05:38,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 70 states, 70 states have (on average 2.0285714285714285) internal successors, (142), 69 states have internal predecessors, (142), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:05:38,459 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 347 transitions. [2021-05-02 23:05:38,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2021-05-02 23:05:38,460 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:05:38,460 INFO L523 BasicCegarLoop]: trace histogram [67, 67, 67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:05:38,460 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-05-02 23:05:38,460 INFO L428 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:05:38,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:05:38,460 INFO L82 PathProgramCache]: Analyzing trace with hash -943279679, now seen corresponding path program 67 times [2021-05-02 23:05:38,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:05:38,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [431511236] [2021-05-02 23:05:38,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:05:38,470 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:05:38,471 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:05:38,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:41,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:05:41,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:41,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:05:41,040 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:05:41,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [431511236] [2021-05-02 23:05:41,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [431511236] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:05:41,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:05:41,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2021-05-02 23:05:41,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631932142] [2021-05-02 23:05:41,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-05-02 23:05:41,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:05:41,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-05-02 23:05:41,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=4764, Unknown=0, NotChecked=0, Total=4970 [2021-05-02 23:05:41,041 INFO L87 Difference]: Start difference. First operand 346 states and 347 transitions. Second operand has 71 states, 71 states have (on average 2.028169014084507) internal successors, (144), 70 states have internal predecessors, (144), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:05:48,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:05:48,983 INFO L93 Difference]: Finished difference Result 559 states and 562 transitions. [2021-05-02 23:05:48,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-02 23:05:48,983 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.028169014084507) internal successors, (144), 70 states have internal predecessors, (144), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 345 [2021-05-02 23:05:48,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:05:48,984 INFO L225 Difference]: With dead ends: 559 [2021-05-02 23:05:48,984 INFO L226 Difference]: Without dead ends: 354 [2021-05-02 23:05:48,985 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2321.4ms TimeCoverageRelationStatistics Valid=211, Invalid=4901, Unknown=0, NotChecked=0, Total=5112 [2021-05-02 23:05:48,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-05-02 23:05:48,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 351. [2021-05-02 23:05:48,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 347 states have (on average 1.005763688760807) internal successors, (349), 347 states have internal predecessors, (349), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:05:49,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 352 transitions. [2021-05-02 23:05:49,005 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 352 transitions. Word has length 345 [2021-05-02 23:05:49,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:05:49,005 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 352 transitions. [2021-05-02 23:05:49,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 71 states, 71 states have (on average 2.028169014084507) internal successors, (144), 70 states have internal predecessors, (144), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:05:49,005 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 352 transitions. [2021-05-02 23:05:49,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2021-05-02 23:05:49,006 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:05:49,007 INFO L523 BasicCegarLoop]: trace histogram [68, 68, 68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:05:49,007 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-05-02 23:05:49,007 INFO L428 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:05:49,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:05:49,007 INFO L82 PathProgramCache]: Analyzing trace with hash 2093728664, now seen corresponding path program 68 times [2021-05-02 23:05:49,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:05:49,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1041815988] [2021-05-02 23:05:49,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:05:49,028 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:05:49,029 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:05:49,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:52,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:05:52,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:52,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:05:52,058 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:05:52,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1041815988] [2021-05-02 23:05:52,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1041815988] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:05:52,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:05:52,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2021-05-02 23:05:52,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533417976] [2021-05-02 23:05:52,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-05-02 23:05:52,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:05:52,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-05-02 23:05:52,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=4903, Unknown=0, NotChecked=0, Total=5112 [2021-05-02 23:05:52,059 INFO L87 Difference]: Start difference. First operand 351 states and 352 transitions. Second operand has 72 states, 72 states have (on average 2.0277777777777777) internal successors, (146), 71 states have internal predecessors, (146), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:06:00,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:06:00,144 INFO L93 Difference]: Finished difference Result 567 states and 570 transitions. [2021-05-02 23:06:00,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-05-02 23:06:00,145 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.0277777777777777) internal successors, (146), 71 states have internal predecessors, (146), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 350 [2021-05-02 23:06:00,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:06:00,146 INFO L225 Difference]: With dead ends: 567 [2021-05-02 23:06:00,146 INFO L226 Difference]: Without dead ends: 359 [2021-05-02 23:06:00,146 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2667.6ms TimeCoverageRelationStatistics Valid=214, Invalid=5042, Unknown=0, NotChecked=0, Total=5256 [2021-05-02 23:06:00,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-05-02 23:06:00,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 356. [2021-05-02 23:06:00,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 352 states have (on average 1.0056818181818181) internal successors, (354), 352 states have internal predecessors, (354), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:06:00,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 357 transitions. [2021-05-02 23:06:00,152 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 357 transitions. Word has length 350 [2021-05-02 23:06:00,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:06:00,152 INFO L480 AbstractCegarLoop]: Abstraction has 356 states and 357 transitions. [2021-05-02 23:06:00,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 72 states, 72 states have (on average 2.0277777777777777) internal successors, (146), 71 states have internal predecessors, (146), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:06:00,152 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 357 transitions. [2021-05-02 23:06:00,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2021-05-02 23:06:00,154 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:06:00,154 INFO L523 BasicCegarLoop]: trace histogram [69, 69, 69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:06:00,154 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-05-02 23:06:00,154 INFO L428 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:06:00,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:06:00,154 INFO L82 PathProgramCache]: Analyzing trace with hash -14999331, now seen corresponding path program 69 times [2021-05-02 23:06:00,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:06:00,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958228862] [2021-05-02 23:06:00,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:06:00,158 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:06:00,159 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:06:00,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:06:02,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:06:02,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:06:02,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:06:02,815 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:06:02,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958228862] [2021-05-02 23:06:02,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1958228862] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:06:02,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:06:02,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2021-05-02 23:06:02,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467761986] [2021-05-02 23:06:02,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states [2021-05-02 23:06:02,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:06:02,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-05-02 23:06:02,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=5044, Unknown=0, NotChecked=0, Total=5256 [2021-05-02 23:06:02,816 INFO L87 Difference]: Start difference. First operand 356 states and 357 transitions. Second operand has 73 states, 73 states have (on average 2.0273972602739727) internal successors, (148), 72 states have internal predecessors, (148), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:06:11,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:06:11,215 INFO L93 Difference]: Finished difference Result 575 states and 578 transitions. [2021-05-02 23:06:11,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-02 23:06:11,215 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.0273972602739727) internal successors, (148), 72 states have internal predecessors, (148), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 355 [2021-05-02 23:06:11,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:06:11,216 INFO L225 Difference]: With dead ends: 575 [2021-05-02 23:06:11,216 INFO L226 Difference]: Without dead ends: 364 [2021-05-02 23:06:11,217 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2416.4ms TimeCoverageRelationStatistics Valid=217, Invalid=5185, Unknown=0, NotChecked=0, Total=5402 [2021-05-02 23:06:11,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-05-02 23:06:11,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 361. [2021-05-02 23:06:11,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 357 states have (on average 1.0056022408963585) internal successors, (359), 357 states have internal predecessors, (359), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:06:11,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 362 transitions. [2021-05-02 23:06:11,226 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 362 transitions. Word has length 355 [2021-05-02 23:06:11,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:06:11,226 INFO L480 AbstractCegarLoop]: Abstraction has 361 states and 362 transitions. [2021-05-02 23:06:11,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 73 states, 73 states have (on average 2.0273972602739727) internal successors, (148), 72 states have internal predecessors, (148), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:06:11,226 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 362 transitions. [2021-05-02 23:06:11,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2021-05-02 23:06:11,227 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:06:11,228 INFO L523 BasicCegarLoop]: trace histogram [70, 70, 70, 70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:06:11,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-05-02 23:06:11,228 INFO L428 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:06:11,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:06:11,228 INFO L82 PathProgramCache]: Analyzing trace with hash 527817852, now seen corresponding path program 70 times [2021-05-02 23:06:11,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:06:11,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869834621] [2021-05-02 23:06:11,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:06:11,233 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:06:11,234 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:06:11,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:06:13,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:06:13,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:06:13,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:06:14,000 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:06:14,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869834621] [2021-05-02 23:06:14,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1869834621] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:06:14,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:06:14,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2021-05-02 23:06:14,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665111372] [2021-05-02 23:06:14,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-05-02 23:06:14,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:06:14,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-05-02 23:06:14,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=5187, Unknown=0, NotChecked=0, Total=5402 [2021-05-02 23:06:14,001 INFO L87 Difference]: Start difference. First operand 361 states and 362 transitions. Second operand has 74 states, 74 states have (on average 2.027027027027027) internal successors, (150), 73 states have internal predecessors, (150), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:06:22,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:06:22,646 INFO L93 Difference]: Finished difference Result 583 states and 586 transitions. [2021-05-02 23:06:22,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-02 23:06:22,646 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.027027027027027) internal successors, (150), 73 states have internal predecessors, (150), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 360 [2021-05-02 23:06:22,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:06:22,648 INFO L225 Difference]: With dead ends: 583 [2021-05-02 23:06:22,648 INFO L226 Difference]: Without dead ends: 369 [2021-05-02 23:06:22,648 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2512.3ms TimeCoverageRelationStatistics Valid=220, Invalid=5330, Unknown=0, NotChecked=0, Total=5550 [2021-05-02 23:06:22,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-05-02 23:06:22,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 366. [2021-05-02 23:06:22,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 362 states have (on average 1.0055248618784531) internal successors, (364), 362 states have internal predecessors, (364), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:06:22,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 367 transitions. [2021-05-02 23:06:22,657 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 367 transitions. Word has length 360 [2021-05-02 23:06:22,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:06:22,657 INFO L480 AbstractCegarLoop]: Abstraction has 366 states and 367 transitions. [2021-05-02 23:06:22,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 74 states, 74 states have (on average 2.027027027027027) internal successors, (150), 73 states have internal predecessors, (150), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:06:22,658 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 367 transitions. [2021-05-02 23:06:22,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2021-05-02 23:06:22,659 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:06:22,659 INFO L523 BasicCegarLoop]: trace histogram [71, 71, 71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:06:22,659 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-05-02 23:06:22,660 INFO L428 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:06:22,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:06:22,660 INFO L82 PathProgramCache]: Analyzing trace with hash -645533703, now seen corresponding path program 71 times [2021-05-02 23:06:22,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:06:22,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [565385353] [2021-05-02 23:06:22,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:06:22,665 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:06:22,666 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:06:22,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:06:25,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:06:25,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:06:25,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:06:25,548 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:06:25,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [565385353] [2021-05-02 23:06:25,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [565385353] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:06:25,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:06:25,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2021-05-02 23:06:25,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273581729] [2021-05-02 23:06:25,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-05-02 23:06:25,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:06:25,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-05-02 23:06:25,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=5332, Unknown=0, NotChecked=0, Total=5550 [2021-05-02 23:06:25,550 INFO L87 Difference]: Start difference. First operand 366 states and 367 transitions. Second operand has 75 states, 75 states have (on average 2.026666666666667) internal successors, (152), 74 states have internal predecessors, (152), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:06:34,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:06:34,466 INFO L93 Difference]: Finished difference Result 591 states and 594 transitions. [2021-05-02 23:06:34,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-05-02 23:06:34,467 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.026666666666667) internal successors, (152), 74 states have internal predecessors, (152), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 365 [2021-05-02 23:06:34,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:06:34,468 INFO L225 Difference]: With dead ends: 591 [2021-05-02 23:06:34,468 INFO L226 Difference]: Without dead ends: 374 [2021-05-02 23:06:34,468 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2604.3ms TimeCoverageRelationStatistics Valid=223, Invalid=5477, Unknown=0, NotChecked=0, Total=5700 [2021-05-02 23:06:34,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-05-02 23:06:34,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 371. [2021-05-02 23:06:34,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 367 states have (on average 1.005449591280654) internal successors, (369), 367 states have internal predecessors, (369), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:06:34,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 372 transitions. [2021-05-02 23:06:34,475 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 372 transitions. Word has length 365 [2021-05-02 23:06:34,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:06:34,475 INFO L480 AbstractCegarLoop]: Abstraction has 371 states and 372 transitions. [2021-05-02 23:06:34,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 75 states, 75 states have (on average 2.026666666666667) internal successors, (152), 74 states have internal predecessors, (152), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:06:34,475 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 372 transitions. [2021-05-02 23:06:34,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2021-05-02 23:06:34,477 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:06:34,477 INFO L523 BasicCegarLoop]: trace histogram [72, 72, 72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:06:34,477 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-05-02 23:06:34,477 INFO L428 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:06:34,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:06:34,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1169339744, now seen corresponding path program 72 times [2021-05-02 23:06:34,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:06:34,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [331363266] [2021-05-02 23:06:34,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:06:34,483 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:06:34,484 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:06:34,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:06:37,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:06:37,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:06:37,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:06:37,431 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:06:37,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [331363266] [2021-05-02 23:06:37,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [331363266] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:06:37,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:06:37,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2021-05-02 23:06:37,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550836294] [2021-05-02 23:06:37,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2021-05-02 23:06:37,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:06:37,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-05-02 23:06:37,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=5479, Unknown=0, NotChecked=0, Total=5700 [2021-05-02 23:06:37,433 INFO L87 Difference]: Start difference. First operand 371 states and 372 transitions. Second operand has 76 states, 76 states have (on average 2.026315789473684) internal successors, (154), 75 states have internal predecessors, (154), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:06:46,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:06:46,504 INFO L93 Difference]: Finished difference Result 599 states and 602 transitions. [2021-05-02 23:06:46,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-05-02 23:06:46,505 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.026315789473684) internal successors, (154), 75 states have internal predecessors, (154), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 370 [2021-05-02 23:06:46,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:06:46,506 INFO L225 Difference]: With dead ends: 599 [2021-05-02 23:06:46,506 INFO L226 Difference]: Without dead ends: 379 [2021-05-02 23:06:46,507 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2672.6ms TimeCoverageRelationStatistics Valid=226, Invalid=5626, Unknown=0, NotChecked=0, Total=5852 [2021-05-02 23:06:46,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-05-02 23:06:46,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 376. [2021-05-02 23:06:46,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 372 states have (on average 1.0053763440860215) internal successors, (374), 372 states have internal predecessors, (374), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:06:46,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 377 transitions. [2021-05-02 23:06:46,513 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 377 transitions. Word has length 370 [2021-05-02 23:06:46,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:06:46,513 INFO L480 AbstractCegarLoop]: Abstraction has 376 states and 377 transitions. [2021-05-02 23:06:46,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 76 states, 76 states have (on average 2.026315789473684) internal successors, (154), 75 states have internal predecessors, (154), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:06:46,514 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 377 transitions. [2021-05-02 23:06:46,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2021-05-02 23:06:46,515 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:06:46,515 INFO L523 BasicCegarLoop]: trace histogram [73, 73, 73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:06:46,515 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-05-02 23:06:46,515 INFO L428 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:06:46,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:06:46,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1177231595, now seen corresponding path program 73 times [2021-05-02 23:06:46,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:06:46,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786751743] [2021-05-02 23:06:46,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:06:46,528 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:06:46,529 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:06:46,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:06:49,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:06:49,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:06:49,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:06:49,652 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:06:49,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1786751743] [2021-05-02 23:06:49,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1786751743] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:06:49,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:06:49,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2021-05-02 23:06:49,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438550414] [2021-05-02 23:06:49,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 77 states [2021-05-02 23:06:49,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:06:49,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-05-02 23:06:49,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=5628, Unknown=0, NotChecked=0, Total=5852 [2021-05-02 23:06:49,654 INFO L87 Difference]: Start difference. First operand 376 states and 377 transitions. Second operand has 77 states, 77 states have (on average 2.0259740259740258) internal successors, (156), 76 states have internal predecessors, (156), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:06:58,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:06:58,994 INFO L93 Difference]: Finished difference Result 607 states and 610 transitions. [2021-05-02 23:06:58,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-02 23:06:58,995 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.0259740259740258) internal successors, (156), 76 states have internal predecessors, (156), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 375 [2021-05-02 23:06:58,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:06:58,996 INFO L225 Difference]: With dead ends: 607 [2021-05-02 23:06:58,996 INFO L226 Difference]: Without dead ends: 384 [2021-05-02 23:06:58,996 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2758.0ms TimeCoverageRelationStatistics Valid=229, Invalid=5777, Unknown=0, NotChecked=0, Total=6006 [2021-05-02 23:06:58,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-05-02 23:06:59,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 381. [2021-05-02 23:06:59,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 377 states have (on average 1.0053050397877985) internal successors, (379), 377 states have internal predecessors, (379), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:06:59,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 382 transitions. [2021-05-02 23:06:59,018 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 382 transitions. Word has length 375 [2021-05-02 23:06:59,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:06:59,018 INFO L480 AbstractCegarLoop]: Abstraction has 381 states and 382 transitions. [2021-05-02 23:06:59,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 77 states, 77 states have (on average 2.0259740259740258) internal successors, (156), 76 states have internal predecessors, (156), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:06:59,019 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 382 transitions. [2021-05-02 23:06:59,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2021-05-02 23:06:59,020 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:06:59,020 INFO L523 BasicCegarLoop]: trace histogram [74, 74, 74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:06:59,021 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-05-02 23:06:59,021 INFO L428 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:06:59,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:06:59,021 INFO L82 PathProgramCache]: Analyzing trace with hash 2029293124, now seen corresponding path program 74 times [2021-05-02 23:06:59,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:06:59,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405975323] [2021-05-02 23:06:59,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:06:59,032 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:06:59,033 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:06:59,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:07:02,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:07:02,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:07:02,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:07:02,115 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:07:02,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405975323] [2021-05-02 23:07:02,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1405975323] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:07:02,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:07:02,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2021-05-02 23:07:02,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192117956] [2021-05-02 23:07:02,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-05-02 23:07:02,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:07:02,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-05-02 23:07:02,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=5779, Unknown=0, NotChecked=0, Total=6006 [2021-05-02 23:07:02,117 INFO L87 Difference]: Start difference. First operand 381 states and 382 transitions. Second operand has 78 states, 78 states have (on average 2.0256410256410255) internal successors, (158), 77 states have internal predecessors, (158), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:07:11,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:07:11,780 INFO L93 Difference]: Finished difference Result 615 states and 618 transitions. [2021-05-02 23:07:11,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-05-02 23:07:11,780 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.0256410256410255) internal successors, (158), 77 states have internal predecessors, (158), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 380 [2021-05-02 23:07:11,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:07:11,782 INFO L225 Difference]: With dead ends: 615 [2021-05-02 23:07:11,782 INFO L226 Difference]: Without dead ends: 389 [2021-05-02 23:07:11,782 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2787.6ms TimeCoverageRelationStatistics Valid=232, Invalid=5930, Unknown=0, NotChecked=0, Total=6162 [2021-05-02 23:07:11,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-05-02 23:07:11,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 386. [2021-05-02 23:07:11,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 382 states have (on average 1.0052356020942408) internal successors, (384), 382 states have internal predecessors, (384), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:07:11,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 387 transitions. [2021-05-02 23:07:11,789 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 387 transitions. Word has length 380 [2021-05-02 23:07:11,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:07:11,789 INFO L480 AbstractCegarLoop]: Abstraction has 386 states and 387 transitions. [2021-05-02 23:07:11,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 78 states, 78 states have (on average 2.0256410256410255) internal successors, (158), 77 states have internal predecessors, (158), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:07:11,789 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 387 transitions. [2021-05-02 23:07:11,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2021-05-02 23:07:11,791 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:07:11,791 INFO L523 BasicCegarLoop]: trace histogram [75, 75, 75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:07:11,791 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-05-02 23:07:11,791 INFO L428 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:07:11,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:07:11,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1856655823, now seen corresponding path program 75 times [2021-05-02 23:07:11,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:07:11,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1559969591] [2021-05-02 23:07:11,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:07:11,795 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:07:11,796 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:07:12,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:07:14,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:07:14,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:07:14,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:07:14,985 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:07:14,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1559969591] [2021-05-02 23:07:14,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1559969591] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:07:14,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:07:14,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2021-05-02 23:07:14,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442150562] [2021-05-02 23:07:14,986 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states [2021-05-02 23:07:14,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:07:14,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-05-02 23:07:14,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=5932, Unknown=0, NotChecked=0, Total=6162 [2021-05-02 23:07:14,987 INFO L87 Difference]: Start difference. First operand 386 states and 387 transitions. Second operand has 79 states, 79 states have (on average 2.0253164556962027) internal successors, (160), 78 states have internal predecessors, (160), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:07:24,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:07:24,859 INFO L93 Difference]: Finished difference Result 623 states and 626 transitions. [2021-05-02 23:07:24,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-05-02 23:07:24,859 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.0253164556962027) internal successors, (160), 78 states have internal predecessors, (160), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 385 [2021-05-02 23:07:24,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:07:24,860 INFO L225 Difference]: With dead ends: 623 [2021-05-02 23:07:24,860 INFO L226 Difference]: Without dead ends: 394 [2021-05-02 23:07:24,861 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2907.7ms TimeCoverageRelationStatistics Valid=235, Invalid=6085, Unknown=0, NotChecked=0, Total=6320 [2021-05-02 23:07:24,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-05-02 23:07:24,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 391. [2021-05-02 23:07:24,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 387 states have (on average 1.0051679586563307) internal successors, (389), 387 states have internal predecessors, (389), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:07:24,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 392 transitions. [2021-05-02 23:07:24,868 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 392 transitions. Word has length 385 [2021-05-02 23:07:24,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:07:24,868 INFO L480 AbstractCegarLoop]: Abstraction has 391 states and 392 transitions. [2021-05-02 23:07:24,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 79 states, 79 states have (on average 2.0253164556962027) internal successors, (160), 78 states have internal predecessors, (160), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:07:24,869 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 392 transitions. [2021-05-02 23:07:24,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-05-02 23:07:24,870 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:07:24,870 INFO L523 BasicCegarLoop]: trace histogram [76, 76, 76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:07:24,870 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-05-02 23:07:24,870 INFO L428 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:07:24,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:07:24,870 INFO L82 PathProgramCache]: Analyzing trace with hash -433215704, now seen corresponding path program 76 times [2021-05-02 23:07:24,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:07:24,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895150581] [2021-05-02 23:07:24,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:07:24,877 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:07:24,878 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:07:25,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:07:28,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:07:28,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:07:28,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:07:28,128 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:07:28,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895150581] [2021-05-02 23:07:28,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1895150581] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:07:28,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:07:28,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2021-05-02 23:07:28,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829161969] [2021-05-02 23:07:28,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2021-05-02 23:07:28,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:07:28,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-05-02 23:07:28,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=6087, Unknown=0, NotChecked=0, Total=6320 [2021-05-02 23:07:28,129 INFO L87 Difference]: Start difference. First operand 391 states and 392 transitions. Second operand has 80 states, 80 states have (on average 2.025) internal successors, (162), 79 states have internal predecessors, (162), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:07:38,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:07:38,405 INFO L93 Difference]: Finished difference Result 631 states and 634 transitions. [2021-05-02 23:07:38,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-05-02 23:07:38,405 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.025) internal successors, (162), 79 states have internal predecessors, (162), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 390 [2021-05-02 23:07:38,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:07:38,406 INFO L225 Difference]: With dead ends: 631 [2021-05-02 23:07:38,406 INFO L226 Difference]: Without dead ends: 399 [2021-05-02 23:07:38,407 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2955.4ms TimeCoverageRelationStatistics Valid=238, Invalid=6242, Unknown=0, NotChecked=0, Total=6480 [2021-05-02 23:07:38,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-05-02 23:07:38,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 396. [2021-05-02 23:07:38,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 392 states have (on average 1.0051020408163265) internal successors, (394), 392 states have internal predecessors, (394), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:07:38,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 397 transitions. [2021-05-02 23:07:38,414 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 397 transitions. Word has length 390 [2021-05-02 23:07:38,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:07:38,415 INFO L480 AbstractCegarLoop]: Abstraction has 396 states and 397 transitions. [2021-05-02 23:07:38,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 80 states, 80 states have (on average 2.025) internal successors, (162), 79 states have internal predecessors, (162), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:07:38,415 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 397 transitions. [2021-05-02 23:07:38,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2021-05-02 23:07:38,416 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:07:38,416 INFO L523 BasicCegarLoop]: trace histogram [77, 77, 77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:07:38,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-05-02 23:07:38,416 INFO L428 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:07:38,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:07:38,417 INFO L82 PathProgramCache]: Analyzing trace with hash 2077629773, now seen corresponding path program 77 times [2021-05-02 23:07:38,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:07:38,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [218165850] [2021-05-02 23:07:38,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:07:38,421 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:07:38,422 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:07:38,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:07:41,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:07:41,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:07:41,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:07:41,792 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:07:41,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [218165850] [2021-05-02 23:07:41,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [218165850] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:07:41,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:07:41,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2021-05-02 23:07:41,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043460385] [2021-05-02 23:07:41,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 81 states [2021-05-02 23:07:41,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:07:41,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-05-02 23:07:41,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=6244, Unknown=0, NotChecked=0, Total=6480 [2021-05-02 23:07:41,793 INFO L87 Difference]: Start difference. First operand 396 states and 397 transitions. Second operand has 81 states, 81 states have (on average 2.0246913580246915) internal successors, (164), 80 states have internal predecessors, (164), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:07:52,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:07:52,404 INFO L93 Difference]: Finished difference Result 639 states and 642 transitions. [2021-05-02 23:07:52,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-05-02 23:07:52,404 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.0246913580246915) internal successors, (164), 80 states have internal predecessors, (164), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 395 [2021-05-02 23:07:52,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:07:52,405 INFO L225 Difference]: With dead ends: 639 [2021-05-02 23:07:52,405 INFO L226 Difference]: Without dead ends: 404 [2021-05-02 23:07:52,406 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 3055.3ms TimeCoverageRelationStatistics Valid=241, Invalid=6401, Unknown=0, NotChecked=0, Total=6642 [2021-05-02 23:07:52,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-05-02 23:07:52,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 401. [2021-05-02 23:07:52,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 397 states have (on average 1.0050377833753148) internal successors, (399), 397 states have internal predecessors, (399), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:07:52,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 402 transitions. [2021-05-02 23:07:52,413 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 402 transitions. Word has length 395 [2021-05-02 23:07:52,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:07:52,414 INFO L480 AbstractCegarLoop]: Abstraction has 401 states and 402 transitions. [2021-05-02 23:07:52,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 81 states, 81 states have (on average 2.0246913580246915) internal successors, (164), 80 states have internal predecessors, (164), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:07:52,414 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 402 transitions. [2021-05-02 23:07:52,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2021-05-02 23:07:52,416 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:07:52,416 INFO L523 BasicCegarLoop]: trace histogram [78, 78, 78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:07:52,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-05-02 23:07:52,416 INFO L428 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:07:52,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:07:52,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1043316724, now seen corresponding path program 78 times [2021-05-02 23:07:52,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:07:52,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2116661045] [2021-05-02 23:07:52,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:07:52,422 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:07:52,423 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:07:52,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:07:55,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:07:55,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:07:55,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:07:55,867 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:07:55,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2116661045] [2021-05-02 23:07:55,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2116661045] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:07:55,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:07:55,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2021-05-02 23:07:55,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812000677] [2021-05-02 23:07:55,868 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-05-02 23:07:55,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:07:55,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-05-02 23:07:55,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=6403, Unknown=0, NotChecked=0, Total=6642 [2021-05-02 23:07:55,869 INFO L87 Difference]: Start difference. First operand 401 states and 402 transitions. Second operand has 82 states, 82 states have (on average 2.024390243902439) internal successors, (166), 81 states have internal predecessors, (166), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:08:06,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:08:06,924 INFO L93 Difference]: Finished difference Result 647 states and 650 transitions. [2021-05-02 23:08:06,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-05-02 23:08:06,925 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.024390243902439) internal successors, (166), 81 states have internal predecessors, (166), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 400 [2021-05-02 23:08:06,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:08:06,926 INFO L225 Difference]: With dead ends: 647 [2021-05-02 23:08:06,926 INFO L226 Difference]: Without dead ends: 409 [2021-05-02 23:08:06,927 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 3084.4ms TimeCoverageRelationStatistics Valid=244, Invalid=6562, Unknown=0, NotChecked=0, Total=6806 [2021-05-02 23:08:06,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-05-02 23:08:06,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 406. [2021-05-02 23:08:06,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 402 states have (on average 1.0049751243781095) internal successors, (404), 402 states have internal predecessors, (404), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:08:06,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 407 transitions. [2021-05-02 23:08:06,935 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 407 transitions. Word has length 400 [2021-05-02 23:08:06,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:08:06,935 INFO L480 AbstractCegarLoop]: Abstraction has 406 states and 407 transitions. [2021-05-02 23:08:06,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 82 states, 82 states have (on average 2.024390243902439) internal successors, (166), 81 states have internal predecessors, (166), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:08:06,936 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 407 transitions. [2021-05-02 23:08:06,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2021-05-02 23:08:06,937 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:08:06,937 INFO L523 BasicCegarLoop]: trace histogram [79, 79, 79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:08:06,937 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-05-02 23:08:06,937 INFO L428 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:08:06,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:08:06,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1537469545, now seen corresponding path program 79 times [2021-05-02 23:08:06,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:08:06,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1207499430] [2021-05-02 23:08:06,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:08:06,946 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:08:06,947 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:08:07,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:08:10,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:08:10,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:08:10,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:08:10,506 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:08:10,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1207499430] [2021-05-02 23:08:10,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1207499430] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:08:10,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:08:10,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2021-05-02 23:08:10,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462953991] [2021-05-02 23:08:10,507 INFO L460 AbstractCegarLoop]: Interpolant automaton has 83 states [2021-05-02 23:08:10,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:08:10,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-05-02 23:08:10,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=6564, Unknown=0, NotChecked=0, Total=6806 [2021-05-02 23:08:10,508 INFO L87 Difference]: Start difference. First operand 406 states and 407 transitions. Second operand has 83 states, 83 states have (on average 2.0240963855421685) internal successors, (168), 82 states have internal predecessors, (168), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:08:21,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:08:21,775 INFO L93 Difference]: Finished difference Result 655 states and 658 transitions. [2021-05-02 23:08:21,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-05-02 23:08:21,775 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.0240963855421685) internal successors, (168), 82 states have internal predecessors, (168), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 405 [2021-05-02 23:08:21,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:08:21,776 INFO L225 Difference]: With dead ends: 655 [2021-05-02 23:08:21,776 INFO L226 Difference]: Without dead ends: 414 [2021-05-02 23:08:21,777 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 3222.5ms TimeCoverageRelationStatistics Valid=247, Invalid=6725, Unknown=0, NotChecked=0, Total=6972 [2021-05-02 23:08:21,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-05-02 23:08:21,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 411. [2021-05-02 23:08:21,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 407 states have (on average 1.0049140049140048) internal successors, (409), 407 states have internal predecessors, (409), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:08:21,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 412 transitions. [2021-05-02 23:08:21,784 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 412 transitions. Word has length 405 [2021-05-02 23:08:21,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:08:21,784 INFO L480 AbstractCegarLoop]: Abstraction has 411 states and 412 transitions. [2021-05-02 23:08:21,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 83 states, 83 states have (on average 2.0240963855421685) internal successors, (168), 82 states have internal predecessors, (168), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:08:21,785 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 412 transitions. [2021-05-02 23:08:21,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2021-05-02 23:08:21,786 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:08:21,786 INFO L523 BasicCegarLoop]: trace histogram [80, 80, 80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:08:21,786 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-05-02 23:08:21,786 INFO L428 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:08:21,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:08:21,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1412523792, now seen corresponding path program 80 times [2021-05-02 23:08:21,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:08:21,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655595745] [2021-05-02 23:08:21,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:08:21,791 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:08:21,792 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:08:22,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:08:25,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:08:25,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:08:25,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:08:25,493 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:08:25,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655595745] [2021-05-02 23:08:25,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1655595745] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:08:25,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:08:25,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2021-05-02 23:08:25,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62920469] [2021-05-02 23:08:25,494 INFO L460 AbstractCegarLoop]: Interpolant automaton has 84 states [2021-05-02 23:08:25,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:08:25,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-05-02 23:08:25,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=6727, Unknown=0, NotChecked=0, Total=6972 [2021-05-02 23:08:25,495 INFO L87 Difference]: Start difference. First operand 411 states and 412 transitions. Second operand has 84 states, 84 states have (on average 2.0238095238095237) internal successors, (170), 83 states have internal predecessors, (170), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:08:37,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:08:37,058 INFO L93 Difference]: Finished difference Result 663 states and 666 transitions. [2021-05-02 23:08:37,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-05-02 23:08:37,058 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.0238095238095237) internal successors, (170), 83 states have internal predecessors, (170), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 410 [2021-05-02 23:08:37,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:08:37,059 INFO L225 Difference]: With dead ends: 663 [2021-05-02 23:08:37,059 INFO L226 Difference]: Without dead ends: 419 [2021-05-02 23:08:37,060 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 3349.4ms TimeCoverageRelationStatistics Valid=250, Invalid=6890, Unknown=0, NotChecked=0, Total=7140 [2021-05-02 23:08:37,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-05-02 23:08:37,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 416. [2021-05-02 23:08:37,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 412 states have (on average 1.0048543689320388) internal successors, (414), 412 states have internal predecessors, (414), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:08:37,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 417 transitions. [2021-05-02 23:08:37,067 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 417 transitions. Word has length 410 [2021-05-02 23:08:37,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:08:37,068 INFO L480 AbstractCegarLoop]: Abstraction has 416 states and 417 transitions. [2021-05-02 23:08:37,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 84 states, 84 states have (on average 2.0238095238095237) internal successors, (170), 83 states have internal predecessors, (170), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:08:37,068 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 417 transitions. [2021-05-02 23:08:37,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2021-05-02 23:08:37,069 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:08:37,069 INFO L523 BasicCegarLoop]: trace histogram [81, 81, 81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:08:37,069 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2021-05-02 23:08:37,070 INFO L428 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:08:37,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:08:37,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1972165509, now seen corresponding path program 81 times [2021-05-02 23:08:37,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:08:37,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1952288878] [2021-05-02 23:08:37,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:08:37,075 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:08:37,076 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:08:37,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:08:40,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:08:40,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:08:40,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:08:40,850 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:08:40,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1952288878] [2021-05-02 23:08:40,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1952288878] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:08:40,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:08:40,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2021-05-02 23:08:40,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344072177] [2021-05-02 23:08:40,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states [2021-05-02 23:08:40,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:08:40,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-05-02 23:08:40,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=6892, Unknown=0, NotChecked=0, Total=7140 [2021-05-02 23:08:40,851 INFO L87 Difference]: Start difference. First operand 416 states and 417 transitions. Second operand has 85 states, 85 states have (on average 2.023529411764706) internal successors, (172), 84 states have internal predecessors, (172), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:08:52,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:08:52,704 INFO L93 Difference]: Finished difference Result 671 states and 674 transitions. [2021-05-02 23:08:52,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-05-02 23:08:52,705 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.023529411764706) internal successors, (172), 84 states have internal predecessors, (172), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 415 [2021-05-02 23:08:52,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:08:52,706 INFO L225 Difference]: With dead ends: 671 [2021-05-02 23:08:52,706 INFO L226 Difference]: Without dead ends: 424 [2021-05-02 23:08:52,707 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 3425.9ms TimeCoverageRelationStatistics Valid=253, Invalid=7057, Unknown=0, NotChecked=0, Total=7310 [2021-05-02 23:08:52,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-05-02 23:08:52,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 421. [2021-05-02 23:08:52,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 417 states have (on average 1.0047961630695443) internal successors, (419), 417 states have internal predecessors, (419), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:08:52,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 422 transitions. [2021-05-02 23:08:52,715 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 422 transitions. Word has length 415 [2021-05-02 23:08:52,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:08:52,715 INFO L480 AbstractCegarLoop]: Abstraction has 421 states and 422 transitions. [2021-05-02 23:08:52,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 85 states, 85 states have (on average 2.023529411764706) internal successors, (172), 84 states have internal predecessors, (172), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:08:52,715 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 422 transitions. [2021-05-02 23:08:52,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2021-05-02 23:08:52,716 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:08:52,717 INFO L523 BasicCegarLoop]: trace histogram [82, 82, 82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:08:52,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-05-02 23:08:52,717 INFO L428 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:08:52,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:08:52,717 INFO L82 PathProgramCache]: Analyzing trace with hash 328921556, now seen corresponding path program 82 times [2021-05-02 23:08:52,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:08:52,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [626725153] [2021-05-02 23:08:52,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:08:52,723 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:08:52,724 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:08:52,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:08:56,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:08:56,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:08:56,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:08:56,640 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:08:56,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [626725153] [2021-05-02 23:08:56,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [626725153] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:08:56,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:08:56,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2021-05-02 23:08:56,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685349595] [2021-05-02 23:08:56,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-05-02 23:08:56,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:08:56,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-05-02 23:08:56,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=7059, Unknown=0, NotChecked=0, Total=7310 [2021-05-02 23:08:56,641 INFO L87 Difference]: Start difference. First operand 421 states and 422 transitions. Second operand has 86 states, 86 states have (on average 2.0232558139534884) internal successors, (174), 85 states have internal predecessors, (174), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:09:09,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:09:09,651 INFO L93 Difference]: Finished difference Result 679 states and 682 transitions. [2021-05-02 23:09:09,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-05-02 23:09:09,652 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.0232558139534884) internal successors, (174), 85 states have internal predecessors, (174), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 420 [2021-05-02 23:09:09,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:09:09,653 INFO L225 Difference]: With dead ends: 679 [2021-05-02 23:09:09,653 INFO L226 Difference]: Without dead ends: 429 [2021-05-02 23:09:09,654 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 3592.0ms TimeCoverageRelationStatistics Valid=256, Invalid=7226, Unknown=0, NotChecked=0, Total=7482 [2021-05-02 23:09:09,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-05-02 23:09:09,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 426. [2021-05-02 23:09:09,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 422 states have (on average 1.004739336492891) internal successors, (424), 422 states have internal predecessors, (424), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:09:09,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 427 transitions. [2021-05-02 23:09:09,662 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 427 transitions. Word has length 420 [2021-05-02 23:09:09,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:09:09,662 INFO L480 AbstractCegarLoop]: Abstraction has 426 states and 427 transitions. [2021-05-02 23:09:09,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 86 states, 86 states have (on average 2.0232558139534884) internal successors, (174), 85 states have internal predecessors, (174), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:09:09,662 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 427 transitions. [2021-05-02 23:09:09,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2021-05-02 23:09:09,664 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:09:09,664 INFO L523 BasicCegarLoop]: trace histogram [83, 83, 83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:09:09,664 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-05-02 23:09:09,664 INFO L428 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:09:09,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:09:09,665 INFO L82 PathProgramCache]: Analyzing trace with hash 215919265, now seen corresponding path program 83 times [2021-05-02 23:09:09,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:09:09,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1832723897] [2021-05-02 23:09:09,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:09:09,670 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:09:09,671 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:09:10,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:09:13,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:09:13,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:09:13,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:09:13,870 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:09:13,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1832723897] [2021-05-02 23:09:13,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1832723897] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:09:13,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:09:13,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2021-05-02 23:09:13,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519977544] [2021-05-02 23:09:13,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 87 states [2021-05-02 23:09:13,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:09:13,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-05-02 23:09:13,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=7228, Unknown=0, NotChecked=0, Total=7482 [2021-05-02 23:09:13,872 INFO L87 Difference]: Start difference. First operand 426 states and 427 transitions. Second operand has 87 states, 87 states have (on average 2.0229885057471266) internal successors, (176), 86 states have internal predecessors, (176), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:09:27,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:09:27,383 INFO L93 Difference]: Finished difference Result 687 states and 690 transitions. [2021-05-02 23:09:27,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-05-02 23:09:27,384 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.0229885057471266) internal successors, (176), 86 states have internal predecessors, (176), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 425 [2021-05-02 23:09:27,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:09:27,385 INFO L225 Difference]: With dead ends: 687 [2021-05-02 23:09:27,385 INFO L226 Difference]: Without dead ends: 434 [2021-05-02 23:09:27,386 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 3782.9ms TimeCoverageRelationStatistics Valid=259, Invalid=7397, Unknown=0, NotChecked=0, Total=7656 [2021-05-02 23:09:27,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-05-02 23:09:27,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 431. [2021-05-02 23:09:27,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 427 states have (on average 1.0046838407494145) internal successors, (429), 427 states have internal predecessors, (429), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:09:27,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 432 transitions. [2021-05-02 23:09:27,396 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 432 transitions. Word has length 425 [2021-05-02 23:09:27,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:09:27,396 INFO L480 AbstractCegarLoop]: Abstraction has 431 states and 432 transitions. [2021-05-02 23:09:27,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 87 states, 87 states have (on average 2.0229885057471266) internal successors, (176), 86 states have internal predecessors, (176), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:09:27,397 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 432 transitions. [2021-05-02 23:09:27,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2021-05-02 23:09:27,399 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:09:27,399 INFO L523 BasicCegarLoop]: trace histogram [84, 84, 84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:09:27,399 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2021-05-02 23:09:27,399 INFO L428 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:09:27,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:09:27,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1675130184, now seen corresponding path program 84 times [2021-05-02 23:09:27,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:09:27,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1374112357] [2021-05-02 23:09:27,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:09:27,409 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:09:27,411 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:09:27,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:09:31,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:09:31,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:09:31,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:09:31,746 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:09:31,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1374112357] [2021-05-02 23:09:31,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1374112357] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:09:31,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:09:31,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2021-05-02 23:09:31,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768254715] [2021-05-02 23:09:31,747 INFO L460 AbstractCegarLoop]: Interpolant automaton has 88 states [2021-05-02 23:09:31,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:09:31,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-05-02 23:09:31,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=7399, Unknown=0, NotChecked=0, Total=7656 [2021-05-02 23:09:31,748 INFO L87 Difference]: Start difference. First operand 431 states and 432 transitions. Second operand has 88 states, 88 states have (on average 2.022727272727273) internal successors, (178), 87 states have internal predecessors, (178), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:09:45,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:09:45,760 INFO L93 Difference]: Finished difference Result 695 states and 698 transitions. [2021-05-02 23:09:45,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-05-02 23:09:45,761 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.022727272727273) internal successors, (178), 87 states have internal predecessors, (178), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 430 [2021-05-02 23:09:45,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:09:45,763 INFO L225 Difference]: With dead ends: 695 [2021-05-02 23:09:45,763 INFO L226 Difference]: Without dead ends: 439 [2021-05-02 23:09:45,766 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 3909.3ms TimeCoverageRelationStatistics Valid=262, Invalid=7570, Unknown=0, NotChecked=0, Total=7832 [2021-05-02 23:09:45,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-05-02 23:09:45,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 436. [2021-05-02 23:09:45,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 432 states have (on average 1.0046296296296295) internal successors, (434), 432 states have internal predecessors, (434), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:09:45,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 437 transitions. [2021-05-02 23:09:45,775 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 437 transitions. Word has length 430 [2021-05-02 23:09:45,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:09:45,775 INFO L480 AbstractCegarLoop]: Abstraction has 436 states and 437 transitions. [2021-05-02 23:09:45,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 88 states, 88 states have (on average 2.022727272727273) internal successors, (178), 87 states have internal predecessors, (178), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:09:45,775 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 437 transitions. [2021-05-02 23:09:45,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2021-05-02 23:09:45,777 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:09:45,777 INFO L523 BasicCegarLoop]: trace histogram [85, 85, 85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:09:45,777 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-05-02 23:09:45,777 INFO L428 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:09:45,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:09:45,778 INFO L82 PathProgramCache]: Analyzing trace with hash -10020419, now seen corresponding path program 85 times [2021-05-02 23:09:45,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:09:45,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26589730] [2021-05-02 23:09:45,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:09:45,785 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:09:45,785 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:09:46,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:09:49,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:09:49,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:09:49,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:09:49,926 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:09:49,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26589730] [2021-05-02 23:09:49,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [26589730] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:09:49,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:09:49,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2021-05-02 23:09:49,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161450929] [2021-05-02 23:09:49,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 89 states [2021-05-02 23:09:49,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:09:49,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-05-02 23:09:49,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=7572, Unknown=0, NotChecked=0, Total=7832 [2021-05-02 23:09:49,928 INFO L87 Difference]: Start difference. First operand 436 states and 437 transitions. Second operand has 89 states, 89 states have (on average 2.0224719101123596) internal successors, (180), 88 states have internal predecessors, (180), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:10:03,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:10:03,436 INFO L93 Difference]: Finished difference Result 703 states and 706 transitions. [2021-05-02 23:10:03,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-05-02 23:10:03,437 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.0224719101123596) internal successors, (180), 88 states have internal predecessors, (180), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 435 [2021-05-02 23:10:03,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:10:03,438 INFO L225 Difference]: With dead ends: 703 [2021-05-02 23:10:03,438 INFO L226 Difference]: Without dead ends: 444 [2021-05-02 23:10:03,439 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 3715.3ms TimeCoverageRelationStatistics Valid=265, Invalid=7745, Unknown=0, NotChecked=0, Total=8010 [2021-05-02 23:10:03,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-05-02 23:10:03,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 441. [2021-05-02 23:10:03,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 437 states have (on average 1.0045766590389016) internal successors, (439), 437 states have internal predecessors, (439), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:10:03,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 442 transitions. [2021-05-02 23:10:03,448 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 442 transitions. Word has length 435 [2021-05-02 23:10:03,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:10:03,448 INFO L480 AbstractCegarLoop]: Abstraction has 441 states and 442 transitions. [2021-05-02 23:10:03,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 89 states, 89 states have (on average 2.0224719101123596) internal successors, (180), 88 states have internal predecessors, (180), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:10:03,448 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 442 transitions. [2021-05-02 23:10:03,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2021-05-02 23:10:03,450 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:10:03,450 INFO L523 BasicCegarLoop]: trace histogram [86, 86, 86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:10:03,450 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2021-05-02 23:10:03,450 INFO L428 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:10:03,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:10:03,451 INFO L82 PathProgramCache]: Analyzing trace with hash 2145821596, now seen corresponding path program 86 times [2021-05-02 23:10:03,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:10:03,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [996359217] [2021-05-02 23:10:03,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:10:03,468 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:10:03,469 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:10:03,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:10:07,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:10:07,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:10:07,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:10:07,857 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:10:07,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [996359217] [2021-05-02 23:10:07,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [996359217] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:10:07,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:10:07,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2021-05-02 23:10:07,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998605045] [2021-05-02 23:10:07,858 INFO L460 AbstractCegarLoop]: Interpolant automaton has 90 states [2021-05-02 23:10:07,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:10:07,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-05-02 23:10:07,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=7747, Unknown=0, NotChecked=0, Total=8010 [2021-05-02 23:10:07,859 INFO L87 Difference]: Start difference. First operand 441 states and 442 transitions. Second operand has 90 states, 90 states have (on average 2.022222222222222) internal successors, (182), 89 states have internal predecessors, (182), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:10:23,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:10:23,605 INFO L93 Difference]: Finished difference Result 711 states and 714 transitions. [2021-05-02 23:10:23,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-05-02 23:10:23,606 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.022222222222222) internal successors, (182), 89 states have internal predecessors, (182), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 440 [2021-05-02 23:10:23,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:10:23,607 INFO L225 Difference]: With dead ends: 711 [2021-05-02 23:10:23,607 INFO L226 Difference]: Without dead ends: 449 [2021-05-02 23:10:23,608 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 3993.2ms TimeCoverageRelationStatistics Valid=268, Invalid=7922, Unknown=0, NotChecked=0, Total=8190 [2021-05-02 23:10:23,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-05-02 23:10:23,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 446. [2021-05-02 23:10:23,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 442 states have (on average 1.004524886877828) internal successors, (444), 442 states have internal predecessors, (444), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:10:23,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 447 transitions. [2021-05-02 23:10:23,616 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 447 transitions. Word has length 440 [2021-05-02 23:10:23,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:10:23,616 INFO L480 AbstractCegarLoop]: Abstraction has 446 states and 447 transitions. [2021-05-02 23:10:23,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 90 states, 90 states have (on average 2.022222222222222) internal successors, (182), 89 states have internal predecessors, (182), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:10:23,616 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 447 transitions. [2021-05-02 23:10:23,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2021-05-02 23:10:23,618 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:10:23,618 INFO L523 BasicCegarLoop]: trace histogram [87, 87, 87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:10:23,618 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2021-05-02 23:10:23,618 INFO L428 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:10:23,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:10:23,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1634986201, now seen corresponding path program 87 times [2021-05-02 23:10:23,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:10:23,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1421773974] [2021-05-02 23:10:23,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:10:23,623 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:10:23,624 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:10:23,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:10:28,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:10:28,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:10:28,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:10:28,341 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:10:28,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1421773974] [2021-05-02 23:10:28,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1421773974] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:10:28,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:10:28,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2021-05-02 23:10:28,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732259922] [2021-05-02 23:10:28,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 91 states [2021-05-02 23:10:28,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:10:28,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-05-02 23:10:28,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=7924, Unknown=0, NotChecked=0, Total=8190 [2021-05-02 23:10:28,343 INFO L87 Difference]: Start difference. First operand 446 states and 447 transitions. Second operand has 91 states, 91 states have (on average 2.021978021978022) internal successors, (184), 90 states have internal predecessors, (184), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:10:43,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:10:43,723 INFO L93 Difference]: Finished difference Result 719 states and 722 transitions. [2021-05-02 23:10:43,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-05-02 23:10:43,724 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.021978021978022) internal successors, (184), 90 states have internal predecessors, (184), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 445 [2021-05-02 23:10:43,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:10:43,725 INFO L225 Difference]: With dead ends: 719 [2021-05-02 23:10:43,725 INFO L226 Difference]: Without dead ends: 454 [2021-05-02 23:10:43,726 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 4329.6ms TimeCoverageRelationStatistics Valid=271, Invalid=8101, Unknown=0, NotChecked=0, Total=8372 [2021-05-02 23:10:43,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-05-02 23:10:43,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 451. [2021-05-02 23:10:43,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 447 states have (on average 1.0044742729306488) internal successors, (449), 447 states have internal predecessors, (449), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:10:43,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 452 transitions. [2021-05-02 23:10:43,735 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 452 transitions. Word has length 445 [2021-05-02 23:10:43,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:10:43,735 INFO L480 AbstractCegarLoop]: Abstraction has 451 states and 452 transitions. [2021-05-02 23:10:43,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 91 states, 91 states have (on average 2.021978021978022) internal successors, (184), 90 states have internal predecessors, (184), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:10:43,736 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 452 transitions. [2021-05-02 23:10:43,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2021-05-02 23:10:43,737 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:10:43,737 INFO L523 BasicCegarLoop]: trace histogram [88, 88, 88, 88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:10:43,738 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2021-05-02 23:10:43,738 INFO L428 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:10:43,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:10:43,738 INFO L82 PathProgramCache]: Analyzing trace with hash -188056448, now seen corresponding path program 88 times [2021-05-02 23:10:43,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:10:43,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1361299908] [2021-05-02 23:10:43,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:10:43,748 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:10:43,749 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:10:44,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:10:48,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:10:48,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:10:48,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:10:48,569 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:10:48,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1361299908] [2021-05-02 23:10:48,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1361299908] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:10:48,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:10:48,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2021-05-02 23:10:48,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771508555] [2021-05-02 23:10:48,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 92 states [2021-05-02 23:10:48,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:10:48,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-05-02 23:10:48,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=8103, Unknown=0, NotChecked=0, Total=8372 [2021-05-02 23:10:48,570 INFO L87 Difference]: Start difference. First operand 451 states and 452 transitions. Second operand has 92 states, 92 states have (on average 2.0217391304347827) internal successors, (186), 91 states have internal predecessors, (186), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:11:04,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:11:04,122 INFO L93 Difference]: Finished difference Result 727 states and 730 transitions. [2021-05-02 23:11:04,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-05-02 23:11:04,122 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.0217391304347827) internal successors, (186), 91 states have internal predecessors, (186), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 450 [2021-05-02 23:11:04,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:11:04,124 INFO L225 Difference]: With dead ends: 727 [2021-05-02 23:11:04,124 INFO L226 Difference]: Without dead ends: 459 [2021-05-02 23:11:04,125 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 4387.0ms TimeCoverageRelationStatistics Valid=274, Invalid=8282, Unknown=0, NotChecked=0, Total=8556 [2021-05-02 23:11:04,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-05-02 23:11:04,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 456. [2021-05-02 23:11:04,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 452 states have (on average 1.0044247787610618) internal successors, (454), 452 states have internal predecessors, (454), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:11:04,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 457 transitions. [2021-05-02 23:11:04,134 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 457 transitions. Word has length 450 [2021-05-02 23:11:04,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:11:04,134 INFO L480 AbstractCegarLoop]: Abstraction has 456 states and 457 transitions. [2021-05-02 23:11:04,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 92 states, 92 states have (on average 2.0217391304347827) internal successors, (186), 91 states have internal predecessors, (186), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:11:04,134 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 457 transitions. [2021-05-02 23:11:04,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2021-05-02 23:11:04,136 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:11:04,136 INFO L523 BasicCegarLoop]: trace histogram [89, 89, 89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:11:04,136 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2021-05-02 23:11:04,136 INFO L428 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:11:04,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:11:04,137 INFO L82 PathProgramCache]: Analyzing trace with hash 433248245, now seen corresponding path program 89 times [2021-05-02 23:11:04,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:11:04,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1450657450] [2021-05-02 23:11:04,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:11:04,142 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:11:04,143 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:11:04,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:11:09,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:11:09,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:11:09,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:11:09,330 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:11:09,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1450657450] [2021-05-02 23:11:09,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1450657450] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:11:09,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:11:09,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2021-05-02 23:11:09,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297840456] [2021-05-02 23:11:09,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 93 states [2021-05-02 23:11:09,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:11:09,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-05-02 23:11:09,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=8284, Unknown=0, NotChecked=0, Total=8556 [2021-05-02 23:11:09,332 INFO L87 Difference]: Start difference. First operand 456 states and 457 transitions. Second operand has 93 states, 93 states have (on average 2.021505376344086) internal successors, (188), 92 states have internal predecessors, (188), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:11:28,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:11:28,680 INFO L93 Difference]: Finished difference Result 735 states and 738 transitions. [2021-05-02 23:11:28,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-05-02 23:11:28,681 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.021505376344086) internal successors, (188), 92 states have internal predecessors, (188), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 455 [2021-05-02 23:11:28,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:11:28,683 INFO L225 Difference]: With dead ends: 735 [2021-05-02 23:11:28,683 INFO L226 Difference]: Without dead ends: 464 [2021-05-02 23:11:28,684 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 4726.3ms TimeCoverageRelationStatistics Valid=277, Invalid=8465, Unknown=0, NotChecked=0, Total=8742 [2021-05-02 23:11:28,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-05-02 23:11:28,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 461. [2021-05-02 23:11:28,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 457 states have (on average 1.0043763676148796) internal successors, (459), 457 states have internal predecessors, (459), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:11:28,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 462 transitions. [2021-05-02 23:11:28,695 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 462 transitions. Word has length 455 [2021-05-02 23:11:28,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:11:28,695 INFO L480 AbstractCegarLoop]: Abstraction has 461 states and 462 transitions. [2021-05-02 23:11:28,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 93 states, 93 states have (on average 2.021505376344086) internal successors, (188), 92 states have internal predecessors, (188), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:11:28,695 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 462 transitions. [2021-05-02 23:11:28,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2021-05-02 23:11:28,697 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:11:28,697 INFO L523 BasicCegarLoop]: trace histogram [90, 90, 90, 90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:11:28,698 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2021-05-02 23:11:28,698 INFO L428 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:11:28,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:11:28,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1874504348, now seen corresponding path program 90 times [2021-05-02 23:11:28,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:11:28,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1759979229] [2021-05-02 23:11:28,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:11:28,706 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:11:28,708 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:11:29,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:11:34,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:11:34,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:11:34,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:11:34,208 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:11:34,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1759979229] [2021-05-02 23:11:34,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1759979229] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:11:34,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:11:34,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2021-05-02 23:11:34,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439141458] [2021-05-02 23:11:34,209 INFO L460 AbstractCegarLoop]: Interpolant automaton has 94 states [2021-05-02 23:11:34,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:11:34,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-05-02 23:11:34,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=8467, Unknown=0, NotChecked=0, Total=8742 [2021-05-02 23:11:34,224 INFO L87 Difference]: Start difference. First operand 461 states and 462 transitions. Second operand has 94 states, 94 states have (on average 2.021276595744681) internal successors, (190), 93 states have internal predecessors, (190), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:11:50,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:11:50,956 INFO L93 Difference]: Finished difference Result 743 states and 746 transitions. [2021-05-02 23:11:50,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-05-02 23:11:50,956 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.021276595744681) internal successors, (190), 93 states have internal predecessors, (190), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 460 [2021-05-02 23:11:50,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:11:50,958 INFO L225 Difference]: With dead ends: 743 [2021-05-02 23:11:50,958 INFO L226 Difference]: Without dead ends: 469 [2021-05-02 23:11:50,959 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 5036.5ms TimeCoverageRelationStatistics Valid=280, Invalid=8650, Unknown=0, NotChecked=0, Total=8930 [2021-05-02 23:11:50,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-05-02 23:11:50,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 466. [2021-05-02 23:11:50,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 462 states have (on average 1.0043290043290043) internal successors, (464), 462 states have internal predecessors, (464), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:11:50,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 467 transitions. [2021-05-02 23:11:50,968 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 467 transitions. Word has length 460 [2021-05-02 23:11:50,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:11:50,968 INFO L480 AbstractCegarLoop]: Abstraction has 466 states and 467 transitions. [2021-05-02 23:11:50,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 94 states, 94 states have (on average 2.021276595744681) internal successors, (190), 93 states have internal predecessors, (190), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:11:50,968 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 467 transitions. [2021-05-02 23:11:50,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2021-05-02 23:11:50,970 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:11:50,970 INFO L523 BasicCegarLoop]: trace histogram [91, 91, 91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:11:50,970 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2021-05-02 23:11:50,970 INFO L428 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:11:50,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:11:50,971 INFO L82 PathProgramCache]: Analyzing trace with hash 2110891793, now seen corresponding path program 91 times [2021-05-02 23:11:50,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:11:50,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [112738177] [2021-05-02 23:11:50,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:11:50,976 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:11:50,977 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:11:51,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:11:55,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:11:55,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:11:55,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:11:55,868 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:11:55,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [112738177] [2021-05-02 23:11:55,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [112738177] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:11:55,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:11:55,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2021-05-02 23:11:55,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246908827] [2021-05-02 23:11:55,868 INFO L460 AbstractCegarLoop]: Interpolant automaton has 95 states [2021-05-02 23:11:55,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:11:55,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-05-02 23:11:55,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=8652, Unknown=0, NotChecked=0, Total=8930 [2021-05-02 23:11:55,870 INFO L87 Difference]: Start difference. First operand 466 states and 467 transitions. Second operand has 95 states, 95 states have (on average 2.0210526315789474) internal successors, (192), 94 states have internal predecessors, (192), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:12:15,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:12:15,210 INFO L93 Difference]: Finished difference Result 751 states and 754 transitions. [2021-05-02 23:12:15,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-05-02 23:12:15,211 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.0210526315789474) internal successors, (192), 94 states have internal predecessors, (192), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 465 [2021-05-02 23:12:15,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:12:15,212 INFO L225 Difference]: With dead ends: 751 [2021-05-02 23:12:15,212 INFO L226 Difference]: Without dead ends: 474 [2021-05-02 23:12:15,213 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 4450.0ms TimeCoverageRelationStatistics Valid=283, Invalid=8837, Unknown=0, NotChecked=0, Total=9120 [2021-05-02 23:12:15,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-05-02 23:12:15,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 471. [2021-05-02 23:12:15,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 467 states have (on average 1.0042826552462527) internal successors, (469), 467 states have internal predecessors, (469), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:12:15,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 472 transitions. [2021-05-02 23:12:15,222 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 472 transitions. Word has length 465 [2021-05-02 23:12:15,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:12:15,223 INFO L480 AbstractCegarLoop]: Abstraction has 471 states and 472 transitions. [2021-05-02 23:12:15,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 95 states, 95 states have (on average 2.0210526315789474) internal successors, (192), 94 states have internal predecessors, (192), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:12:15,223 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 472 transitions. [2021-05-02 23:12:15,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2021-05-02 23:12:15,225 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:12:15,225 INFO L523 BasicCegarLoop]: trace histogram [92, 92, 92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:12:15,225 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2021-05-02 23:12:15,225 INFO L428 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:12:15,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:12:15,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1421251000, now seen corresponding path program 92 times [2021-05-02 23:12:15,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:12:15,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1268244628] [2021-05-02 23:12:15,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:12:15,232 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:12:15,233 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:12:15,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:12:21,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:12:21,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:12:21,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:12:21,270 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:12:21,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1268244628] [2021-05-02 23:12:21,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1268244628] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:12:21,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:12:21,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2021-05-02 23:12:21,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751877694] [2021-05-02 23:12:21,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 96 states [2021-05-02 23:12:21,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:12:21,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-05-02 23:12:21,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=8839, Unknown=0, NotChecked=0, Total=9120 [2021-05-02 23:12:21,272 INFO L87 Difference]: Start difference. First operand 471 states and 472 transitions. Second operand has 96 states, 96 states have (on average 2.0208333333333335) internal successors, (194), 95 states have internal predecessors, (194), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:12:40,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:12:40,962 INFO L93 Difference]: Finished difference Result 759 states and 762 transitions. [2021-05-02 23:12:40,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-05-02 23:12:40,963 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.0208333333333335) internal successors, (194), 95 states have internal predecessors, (194), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 470 [2021-05-02 23:12:40,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:12:40,964 INFO L225 Difference]: With dead ends: 759 [2021-05-02 23:12:40,964 INFO L226 Difference]: Without dead ends: 479 [2021-05-02 23:12:40,965 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 5594.6ms TimeCoverageRelationStatistics Valid=286, Invalid=9026, Unknown=0, NotChecked=0, Total=9312 [2021-05-02 23:12:40,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-05-02 23:12:40,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 476. [2021-05-02 23:12:40,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 472 states have (on average 1.0042372881355932) internal successors, (474), 472 states have internal predecessors, (474), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:12:40,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 477 transitions. [2021-05-02 23:12:40,973 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 477 transitions. Word has length 470 [2021-05-02 23:12:40,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:12:40,974 INFO L480 AbstractCegarLoop]: Abstraction has 476 states and 477 transitions. [2021-05-02 23:12:40,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 96 states, 96 states have (on average 2.0208333333333335) internal successors, (194), 95 states have internal predecessors, (194), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:12:40,974 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 477 transitions. [2021-05-02 23:12:40,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2021-05-02 23:12:40,976 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:12:40,976 INFO L523 BasicCegarLoop]: trace histogram [93, 93, 93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:12:40,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2021-05-02 23:12:40,976 INFO L428 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:12:40,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:12:40,976 INFO L82 PathProgramCache]: Analyzing trace with hash -314698195, now seen corresponding path program 93 times [2021-05-02 23:12:40,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:12:40,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [236660283] [2021-05-02 23:12:40,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:12:40,981 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:12:40,982 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:12:41,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:12:46,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:12:46,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:12:46,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:12:46,588 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:12:46,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [236660283] [2021-05-02 23:12:46,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [236660283] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:12:46,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:12:46,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2021-05-02 23:12:46,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115451208] [2021-05-02 23:12:46,589 INFO L460 AbstractCegarLoop]: Interpolant automaton has 97 states [2021-05-02 23:12:46,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:12:46,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-05-02 23:12:46,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=9028, Unknown=0, NotChecked=0, Total=9312 [2021-05-02 23:12:46,590 INFO L87 Difference]: Start difference. First operand 476 states and 477 transitions. Second operand has 97 states, 97 states have (on average 2.020618556701031) internal successors, (196), 96 states have internal predecessors, (196), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:13:05,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:13:05,881 INFO L93 Difference]: Finished difference Result 767 states and 770 transitions. [2021-05-02 23:13:05,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-05-02 23:13:05,882 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.020618556701031) internal successors, (196), 96 states have internal predecessors, (196), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 475 [2021-05-02 23:13:05,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:13:05,883 INFO L225 Difference]: With dead ends: 767 [2021-05-02 23:13:05,884 INFO L226 Difference]: Without dead ends: 484 [2021-05-02 23:13:05,885 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 5214.7ms TimeCoverageRelationStatistics Valid=289, Invalid=9217, Unknown=0, NotChecked=0, Total=9506 [2021-05-02 23:13:05,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-05-02 23:13:05,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 481. [2021-05-02 23:13:05,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 477 states have (on average 1.0041928721174005) internal successors, (479), 477 states have internal predecessors, (479), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:13:05,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 482 transitions. [2021-05-02 23:13:05,893 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 482 transitions. Word has length 475 [2021-05-02 23:13:05,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:13:05,893 INFO L480 AbstractCegarLoop]: Abstraction has 481 states and 482 transitions. [2021-05-02 23:13:05,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 97 states, 97 states have (on average 2.020618556701031) internal successors, (196), 96 states have internal predecessors, (196), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:13:05,894 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 482 transitions. [2021-05-02 23:13:05,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2021-05-02 23:13:05,896 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:13:05,896 INFO L523 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:13:05,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2021-05-02 23:13:05,896 INFO L428 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:13:05,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:13:05,896 INFO L82 PathProgramCache]: Analyzing trace with hash -968292564, now seen corresponding path program 94 times [2021-05-02 23:13:05,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:13:05,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [462571393] [2021-05-02 23:13:05,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:13:05,901 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:13:05,903 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:13:06,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:13:11,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:13:11,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:13:11,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:13:11,888 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:13:11,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [462571393] [2021-05-02 23:13:11,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [462571393] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:13:11,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:13:11,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2021-05-02 23:13:11,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756048984] [2021-05-02 23:13:11,888 INFO L460 AbstractCegarLoop]: Interpolant automaton has 98 states [2021-05-02 23:13:11,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:13:11,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-05-02 23:13:11,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=9219, Unknown=0, NotChecked=0, Total=9506 [2021-05-02 23:13:11,890 INFO L87 Difference]: Start difference. First operand 481 states and 482 transitions. Second operand has 98 states, 98 states have (on average 2.020408163265306) internal successors, (198), 97 states have internal predecessors, (198), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:13:33,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:13:33,506 INFO L93 Difference]: Finished difference Result 775 states and 778 transitions. [2021-05-02 23:13:33,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-05-02 23:13:33,507 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.020408163265306) internal successors, (198), 97 states have internal predecessors, (198), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 480 [2021-05-02 23:13:33,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:13:33,509 INFO L225 Difference]: With dead ends: 775 [2021-05-02 23:13:33,509 INFO L226 Difference]: Without dead ends: 489 [2021-05-02 23:13:33,510 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 5584.3ms TimeCoverageRelationStatistics Valid=292, Invalid=9410, Unknown=0, NotChecked=0, Total=9702 [2021-05-02 23:13:33,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-05-02 23:13:33,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 486. [2021-05-02 23:13:33,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 482 states have (on average 1.004149377593361) internal successors, (484), 482 states have internal predecessors, (484), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:13:33,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 487 transitions. [2021-05-02 23:13:33,521 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 487 transitions. Word has length 480 [2021-05-02 23:13:33,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:13:33,521 INFO L480 AbstractCegarLoop]: Abstraction has 486 states and 487 transitions. [2021-05-02 23:13:33,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 98 states, 98 states have (on average 2.020408163265306) internal successors, (198), 97 states have internal predecessors, (198), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:13:33,521 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 487 transitions. [2021-05-02 23:13:33,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2021-05-02 23:13:33,523 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:13:33,524 INFO L523 BasicCegarLoop]: trace histogram [95, 95, 95, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:13:33,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2021-05-02 23:13:33,524 INFO L428 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:13:33,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:13:33,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1852171593, now seen corresponding path program 95 times [2021-05-02 23:13:33,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:13:33,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399903964] [2021-05-02 23:13:33,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:13:33,531 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:13:33,532 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:13:33,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat