/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_7.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 21:55:25,672 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 21:55:25,675 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 21:55:25,698 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-18 21:55:25,708 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 21:55:25,709 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 21:55:25,710 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 21:55:25,711 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 21:55:25,712 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 21:55:25,713 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 21:55:25,716 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 21:55:25,719 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 21:55:25,721 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 21:55:25,725 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 21:55:25,726 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 21:55:25,727 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 21:55:25,731 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 21:55:25,743 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 21:55:25,754 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 21:55:25,755 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 21:55:25,756 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 21:55:25,800 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 21:55:25,800 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 21:55:25,802 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 21:55:25,803 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 21:55:25,803 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 21:55:25,803 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 21:55:25,804 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 21:55:25,804 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 21:55:25,804 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 21:55:25,804 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 21:55:25,805 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 21:55:25,805 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 21:55:25,806 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 21:55:25,806 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 21:55:25,807 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 21:55:25,807 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 21:55:25,808 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 21:55:25,808 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 21:55:25,808 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 21:55:25,808 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 21:55:25,808 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 21:55:25,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 21:55:25,809 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 21:55:25,809 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 21:55:25,809 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 21:55:25,809 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 21:55:25,810 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 21:55:25,810 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 21:55:25,810 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 21:55:25,810 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=NARROWEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=NARROWEST; [2020-08-18 21:55:26,132 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 21:55:26,146 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 21:55:26,152 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 21:55:26,154 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 21:55:26,154 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 21:55:26,155 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_7.c [2020-08-18 21:55:26,220 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0f90551df/4f92f65167aa4e8b8d1f586ff7d711bd/FLAG473fe88e8 [2020-08-18 21:55:26,682 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 21:55:26,684 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_7.c [2020-08-18 21:55:26,696 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0f90551df/4f92f65167aa4e8b8d1f586ff7d711bd/FLAG473fe88e8 [2020-08-18 21:55:27,018 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0f90551df/4f92f65167aa4e8b8d1f586ff7d711bd [2020-08-18 21:55:27,027 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 21:55:27,029 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 21:55:27,031 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 21:55:27,031 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 21:55:27,035 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 21:55:27,037 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:55:27" (1/1) ... [2020-08-18 21:55:27,041 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11a529ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:27, skipping insertion in model container [2020-08-18 21:55:27,041 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:55:27" (1/1) ... [2020-08-18 21:55:27,050 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 21:55:27,077 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 21:55:27,267 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:55:27,272 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 21:55:27,293 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:55:27,307 INFO L208 MainTranslator]: Completed translation [2020-08-18 21:55:27,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:27 WrapperNode [2020-08-18 21:55:27,308 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 21:55:27,308 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 21:55:27,309 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 21:55:27,309 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 21:55:27,323 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:27" (1/1) ... [2020-08-18 21:55:27,324 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:27" (1/1) ... [2020-08-18 21:55:27,420 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:27" (1/1) ... [2020-08-18 21:55:27,420 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:27" (1/1) ... [2020-08-18 21:55:27,425 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:27" (1/1) ... [2020-08-18 21:55:27,431 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:27" (1/1) ... [2020-08-18 21:55:27,435 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:27" (1/1) ... [2020-08-18 21:55:27,437 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 21:55:27,437 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 21:55:27,437 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 21:55:27,438 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 21:55:27,439 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:27" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 21:55:27,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 21:55:27,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 21:55:27,505 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 21:55:27,505 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 21:55:27,505 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 21:55:27,505 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 21:55:27,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 21:55:27,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 21:55:27,777 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 21:55:27,778 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 21:55:27,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:55:27 BoogieIcfgContainer [2020-08-18 21:55:27,783 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 21:55:27,784 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 21:55:27,784 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 21:55:27,787 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 21:55:27,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 09:55:27" (1/3) ... [2020-08-18 21:55:27,789 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26926a78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:55:27, skipping insertion in model container [2020-08-18 21:55:27,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:27" (2/3) ... [2020-08-18 21:55:27,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26926a78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:55:27, skipping insertion in model container [2020-08-18 21:55:27,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:55:27" (3/3) ... [2020-08-18 21:55:27,792 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_7.c [2020-08-18 21:55:27,804 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 21:55:27,813 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 21:55:27,829 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 21:55:27,862 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 21:55:27,862 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 21:55:27,863 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 21:55:27,863 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 21:55:27,864 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 21:55:27,864 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 21:55:27,864 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 21:55:27,865 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 21:55:27,891 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-08-18 21:55:27,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 21:55:27,902 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:27,906 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:55:27,906 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:27,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:27,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1819770524, now seen corresponding path program 1 times [2020-08-18 21:55:27,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:27,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100176829] [2020-08-18 21:55:27,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:28,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:28,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:28,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:28,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:28,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100176829] [2020-08-18 21:55:28,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:28,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:28,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611917510] [2020-08-18 21:55:28,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:28,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:28,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:28,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:28,185 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-08-18 21:55:28,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:28,248 INFO L93 Difference]: Finished difference Result 69 states and 114 transitions. [2020-08-18 21:55:28,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:28,253 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-18 21:55:28,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:28,274 INFO L225 Difference]: With dead ends: 69 [2020-08-18 21:55:28,275 INFO L226 Difference]: Without dead ends: 54 [2020-08-18 21:55:28,288 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:28,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-18 21:55:28,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2020-08-18 21:55:28,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-18 21:55:28,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 65 transitions. [2020-08-18 21:55:28,344 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 65 transitions. Word has length 17 [2020-08-18 21:55:28,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:28,345 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 65 transitions. [2020-08-18 21:55:28,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:28,345 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 65 transitions. [2020-08-18 21:55:28,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 21:55:28,347 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:28,347 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:55:28,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 21:55:28,348 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:28,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:28,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1426743514, now seen corresponding path program 1 times [2020-08-18 21:55:28,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:28,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1671956746] [2020-08-18 21:55:28,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:28,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:28,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:28,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:28,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:28,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1671956746] [2020-08-18 21:55:28,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:28,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:28,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953970873] [2020-08-18 21:55:28,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:28,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:28,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:28,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:28,416 INFO L87 Difference]: Start difference. First operand 38 states and 65 transitions. Second operand 3 states. [2020-08-18 21:55:28,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:28,464 INFO L93 Difference]: Finished difference Result 87 states and 152 transitions. [2020-08-18 21:55:28,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:28,465 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-18 21:55:28,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:28,466 INFO L225 Difference]: With dead ends: 87 [2020-08-18 21:55:28,467 INFO L226 Difference]: Without dead ends: 54 [2020-08-18 21:55:28,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:28,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-18 21:55:28,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-08-18 21:55:28,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-18 21:55:28,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 89 transitions. [2020-08-18 21:55:28,479 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 89 transitions. Word has length 17 [2020-08-18 21:55:28,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:28,479 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 89 transitions. [2020-08-18 21:55:28,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:28,480 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 89 transitions. [2020-08-18 21:55:28,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 21:55:28,481 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:28,481 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:55:28,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 21:55:28,482 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:28,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:28,482 INFO L82 PathProgramCache]: Analyzing trace with hash 578525748, now seen corresponding path program 1 times [2020-08-18 21:55:28,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:28,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [47095215] [2020-08-18 21:55:28,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:28,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:28,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:28,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:28,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:28,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [47095215] [2020-08-18 21:55:28,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:28,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:28,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155222327] [2020-08-18 21:55:28,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:28,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:28,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:28,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:28,536 INFO L87 Difference]: Start difference. First operand 52 states and 89 transitions. Second operand 3 states. [2020-08-18 21:55:28,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:28,562 INFO L93 Difference]: Finished difference Result 81 states and 135 transitions. [2020-08-18 21:55:28,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:28,562 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-18 21:55:28,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:28,564 INFO L225 Difference]: With dead ends: 81 [2020-08-18 21:55:28,564 INFO L226 Difference]: Without dead ends: 57 [2020-08-18 21:55:28,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:28,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-18 21:55:28,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2020-08-18 21:55:28,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-18 21:55:28,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 91 transitions. [2020-08-18 21:55:28,576 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 91 transitions. Word has length 18 [2020-08-18 21:55:28,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:28,577 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 91 transitions. [2020-08-18 21:55:28,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:28,577 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 91 transitions. [2020-08-18 21:55:28,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 21:55:28,578 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:28,578 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:55:28,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 21:55:28,579 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:28,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:28,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1279590326, now seen corresponding path program 1 times [2020-08-18 21:55:28,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:28,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1806133192] [2020-08-18 21:55:28,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:28,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:28,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:28,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:28,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:28,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1806133192] [2020-08-18 21:55:28,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:28,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:28,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285684352] [2020-08-18 21:55:28,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:28,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:28,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:28,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:28,650 INFO L87 Difference]: Start difference. First operand 55 states and 91 transitions. Second operand 3 states. [2020-08-18 21:55:28,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:28,699 INFO L93 Difference]: Finished difference Result 100 states and 168 transitions. [2020-08-18 21:55:28,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:28,701 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-18 21:55:28,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:28,704 INFO L225 Difference]: With dead ends: 100 [2020-08-18 21:55:28,704 INFO L226 Difference]: Without dead ends: 98 [2020-08-18 21:55:28,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:28,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-08-18 21:55:28,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 72. [2020-08-18 21:55:28,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-18 21:55:28,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 120 transitions. [2020-08-18 21:55:28,728 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 120 transitions. Word has length 18 [2020-08-18 21:55:28,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:28,729 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 120 transitions. [2020-08-18 21:55:28,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:28,729 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 120 transitions. [2020-08-18 21:55:28,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 21:55:28,730 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:28,730 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:55:28,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 21:55:28,731 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:28,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:28,731 INFO L82 PathProgramCache]: Analyzing trace with hash 886563316, now seen corresponding path program 1 times [2020-08-18 21:55:28,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:28,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1129969950] [2020-08-18 21:55:28,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:28,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:28,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:28,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:28,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:28,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1129969950] [2020-08-18 21:55:28,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:28,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:28,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455988975] [2020-08-18 21:55:28,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:28,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:28,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:28,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:28,772 INFO L87 Difference]: Start difference. First operand 72 states and 120 transitions. Second operand 3 states. [2020-08-18 21:55:28,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:28,811 INFO L93 Difference]: Finished difference Result 164 states and 278 transitions. [2020-08-18 21:55:28,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:28,812 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-18 21:55:28,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:28,814 INFO L225 Difference]: With dead ends: 164 [2020-08-18 21:55:28,814 INFO L226 Difference]: Without dead ends: 100 [2020-08-18 21:55:28,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:28,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-08-18 21:55:28,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2020-08-18 21:55:28,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-08-18 21:55:28,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 162 transitions. [2020-08-18 21:55:28,837 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 162 transitions. Word has length 18 [2020-08-18 21:55:28,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:28,838 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 162 transitions. [2020-08-18 21:55:28,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:28,838 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 162 transitions. [2020-08-18 21:55:28,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 21:55:28,839 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:28,839 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:55:28,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 21:55:28,840 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:28,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:28,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1012809135, now seen corresponding path program 1 times [2020-08-18 21:55:28,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:28,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102373770] [2020-08-18 21:55:28,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:28,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:28,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:28,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:28,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:28,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102373770] [2020-08-18 21:55:28,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:28,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:28,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950029543] [2020-08-18 21:55:28,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:28,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:28,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:28,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:28,923 INFO L87 Difference]: Start difference. First operand 98 states and 162 transitions. Second operand 3 states. [2020-08-18 21:55:28,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:28,952 INFO L93 Difference]: Finished difference Result 147 states and 241 transitions. [2020-08-18 21:55:28,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:28,953 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-18 21:55:28,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:28,954 INFO L225 Difference]: With dead ends: 147 [2020-08-18 21:55:28,954 INFO L226 Difference]: Without dead ends: 102 [2020-08-18 21:55:28,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:28,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-08-18 21:55:28,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2020-08-18 21:55:28,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-08-18 21:55:28,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 162 transitions. [2020-08-18 21:55:28,966 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 162 transitions. Word has length 19 [2020-08-18 21:55:28,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:28,967 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 162 transitions. [2020-08-18 21:55:28,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:28,967 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 162 transitions. [2020-08-18 21:55:28,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 21:55:28,968 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:28,968 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:55:28,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 21:55:28,969 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:28,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:28,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1713873713, now seen corresponding path program 1 times [2020-08-18 21:55:28,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:28,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1092727264] [2020-08-18 21:55:28,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:28,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:29,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:29,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:29,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:29,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1092727264] [2020-08-18 21:55:29,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:29,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:29,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417286163] [2020-08-18 21:55:29,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:29,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:29,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:29,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:29,010 INFO L87 Difference]: Start difference. First operand 100 states and 162 transitions. Second operand 3 states. [2020-08-18 21:55:29,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:29,032 INFO L93 Difference]: Finished difference Result 180 states and 296 transitions. [2020-08-18 21:55:29,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:29,033 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-18 21:55:29,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:29,035 INFO L225 Difference]: With dead ends: 180 [2020-08-18 21:55:29,035 INFO L226 Difference]: Without dead ends: 178 [2020-08-18 21:55:29,036 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:29,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-08-18 21:55:29,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 136. [2020-08-18 21:55:29,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-08-18 21:55:29,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 218 transitions. [2020-08-18 21:55:29,049 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 218 transitions. Word has length 19 [2020-08-18 21:55:29,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:29,050 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 218 transitions. [2020-08-18 21:55:29,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:29,050 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 218 transitions. [2020-08-18 21:55:29,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 21:55:29,052 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:29,052 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:55:29,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 21:55:29,052 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:29,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:29,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1320846703, now seen corresponding path program 1 times [2020-08-18 21:55:29,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:29,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [370615238] [2020-08-18 21:55:29,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:29,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:29,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:29,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:29,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:29,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [370615238] [2020-08-18 21:55:29,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:29,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:29,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893700627] [2020-08-18 21:55:29,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:29,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:29,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:29,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:29,091 INFO L87 Difference]: Start difference. First operand 136 states and 218 transitions. Second operand 3 states. [2020-08-18 21:55:29,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:29,113 INFO L93 Difference]: Finished difference Result 312 states and 504 transitions. [2020-08-18 21:55:29,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:29,114 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-18 21:55:29,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:29,127 INFO L225 Difference]: With dead ends: 312 [2020-08-18 21:55:29,127 INFO L226 Difference]: Without dead ends: 186 [2020-08-18 21:55:29,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:29,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-08-18 21:55:29,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2020-08-18 21:55:29,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-08-18 21:55:29,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 290 transitions. [2020-08-18 21:55:29,142 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 290 transitions. Word has length 19 [2020-08-18 21:55:29,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:29,142 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 290 transitions. [2020-08-18 21:55:29,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:29,142 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 290 transitions. [2020-08-18 21:55:29,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 21:55:29,144 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:29,144 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:55:29,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 21:55:29,145 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:29,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:29,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1590692585, now seen corresponding path program 1 times [2020-08-18 21:55:29,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:29,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [196576423] [2020-08-18 21:55:29,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:29,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:29,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:29,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:29,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:29,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [196576423] [2020-08-18 21:55:29,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:29,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:29,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721852348] [2020-08-18 21:55:29,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:29,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:29,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:29,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:29,190 INFO L87 Difference]: Start difference. First operand 184 states and 290 transitions. Second operand 3 states. [2020-08-18 21:55:29,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:29,210 INFO L93 Difference]: Finished difference Result 276 states and 432 transitions. [2020-08-18 21:55:29,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:29,211 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 21:55:29,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:29,213 INFO L225 Difference]: With dead ends: 276 [2020-08-18 21:55:29,213 INFO L226 Difference]: Without dead ends: 190 [2020-08-18 21:55:29,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:29,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-08-18 21:55:29,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 188. [2020-08-18 21:55:29,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-08-18 21:55:29,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 290 transitions. [2020-08-18 21:55:29,228 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 290 transitions. Word has length 20 [2020-08-18 21:55:29,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:29,228 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 290 transitions. [2020-08-18 21:55:29,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:29,228 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 290 transitions. [2020-08-18 21:55:29,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 21:55:29,230 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:29,230 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:55:29,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 21:55:29,231 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:29,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:29,231 INFO L82 PathProgramCache]: Analyzing trace with hash -2003210133, now seen corresponding path program 1 times [2020-08-18 21:55:29,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:29,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1606309254] [2020-08-18 21:55:29,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:29,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:29,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:29,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:29,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:29,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1606309254] [2020-08-18 21:55:29,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:29,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:29,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32171131] [2020-08-18 21:55:29,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:29,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:29,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:29,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:29,277 INFO L87 Difference]: Start difference. First operand 188 states and 290 transitions. Second operand 3 states. [2020-08-18 21:55:29,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:29,300 INFO L93 Difference]: Finished difference Result 332 states and 520 transitions. [2020-08-18 21:55:29,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:29,301 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 21:55:29,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:29,303 INFO L225 Difference]: With dead ends: 332 [2020-08-18 21:55:29,304 INFO L226 Difference]: Without dead ends: 330 [2020-08-18 21:55:29,305 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:29,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-08-18 21:55:29,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 264. [2020-08-18 21:55:29,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-08-18 21:55:29,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 398 transitions. [2020-08-18 21:55:29,320 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 398 transitions. Word has length 20 [2020-08-18 21:55:29,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:29,321 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 398 transitions. [2020-08-18 21:55:29,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:29,321 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 398 transitions. [2020-08-18 21:55:29,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 21:55:29,323 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:29,324 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:55:29,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 21:55:29,324 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:29,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:29,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1898730153, now seen corresponding path program 1 times [2020-08-18 21:55:29,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:29,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1162958414] [2020-08-18 21:55:29,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:29,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:29,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:29,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:29,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:29,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1162958414] [2020-08-18 21:55:29,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:29,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:29,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991544099] [2020-08-18 21:55:29,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:29,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:29,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:29,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:29,359 INFO L87 Difference]: Start difference. First operand 264 states and 398 transitions. Second operand 3 states. [2020-08-18 21:55:29,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:29,384 INFO L93 Difference]: Finished difference Result 604 states and 912 transitions. [2020-08-18 21:55:29,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:29,384 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 21:55:29,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:29,387 INFO L225 Difference]: With dead ends: 604 [2020-08-18 21:55:29,387 INFO L226 Difference]: Without dead ends: 354 [2020-08-18 21:55:29,388 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:29,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-08-18 21:55:29,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 352. [2020-08-18 21:55:29,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-08-18 21:55:29,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 518 transitions. [2020-08-18 21:55:29,405 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 518 transitions. Word has length 20 [2020-08-18 21:55:29,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:29,406 INFO L479 AbstractCegarLoop]: Abstraction has 352 states and 518 transitions. [2020-08-18 21:55:29,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:29,406 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 518 transitions. [2020-08-18 21:55:29,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 21:55:29,409 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:29,409 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:55:29,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 21:55:29,409 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:29,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:29,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1969756604, now seen corresponding path program 1 times [2020-08-18 21:55:29,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:29,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935570646] [2020-08-18 21:55:29,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:29,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:29,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:29,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:29,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:29,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1935570646] [2020-08-18 21:55:29,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:29,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:29,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489630092] [2020-08-18 21:55:29,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:29,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:29,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:29,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:29,450 INFO L87 Difference]: Start difference. First operand 352 states and 518 transitions. Second operand 3 states. [2020-08-18 21:55:29,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:29,478 INFO L93 Difference]: Finished difference Result 528 states and 772 transitions. [2020-08-18 21:55:29,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:29,478 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 21:55:29,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:29,481 INFO L225 Difference]: With dead ends: 528 [2020-08-18 21:55:29,481 INFO L226 Difference]: Without dead ends: 362 [2020-08-18 21:55:29,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:29,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-08-18 21:55:29,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 360. [2020-08-18 21:55:29,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-08-18 21:55:29,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 518 transitions. [2020-08-18 21:55:29,502 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 518 transitions. Word has length 21 [2020-08-18 21:55:29,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:29,502 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 518 transitions. [2020-08-18 21:55:29,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:29,503 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 518 transitions. [2020-08-18 21:55:29,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 21:55:29,505 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:29,506 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:55:29,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 21:55:29,506 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:29,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:29,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1268692026, now seen corresponding path program 1 times [2020-08-18 21:55:29,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:29,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [644410423] [2020-08-18 21:55:29,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:29,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:29,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:29,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:29,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:29,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [644410423] [2020-08-18 21:55:29,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:29,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:29,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972415243] [2020-08-18 21:55:29,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:29,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:29,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:29,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:29,533 INFO L87 Difference]: Start difference. First operand 360 states and 518 transitions. Second operand 3 states. [2020-08-18 21:55:29,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:29,555 INFO L93 Difference]: Finished difference Result 620 states and 904 transitions. [2020-08-18 21:55:29,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:29,556 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 21:55:29,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:29,559 INFO L225 Difference]: With dead ends: 620 [2020-08-18 21:55:29,559 INFO L226 Difference]: Without dead ends: 618 [2020-08-18 21:55:29,560 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:29,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2020-08-18 21:55:29,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 520. [2020-08-18 21:55:29,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2020-08-18 21:55:29,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 726 transitions. [2020-08-18 21:55:29,578 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 726 transitions. Word has length 21 [2020-08-18 21:55:29,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:29,579 INFO L479 AbstractCegarLoop]: Abstraction has 520 states and 726 transitions. [2020-08-18 21:55:29,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:29,579 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 726 transitions. [2020-08-18 21:55:29,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 21:55:29,581 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:29,581 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:55:29,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 21:55:29,581 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:29,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:29,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1661719036, now seen corresponding path program 1 times [2020-08-18 21:55:29,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:29,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1620278405] [2020-08-18 21:55:29,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:29,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:29,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:29,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:29,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:29,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1620278405] [2020-08-18 21:55:29,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:29,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:29,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823081422] [2020-08-18 21:55:29,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:29,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:29,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:29,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:29,609 INFO L87 Difference]: Start difference. First operand 520 states and 726 transitions. Second operand 3 states. [2020-08-18 21:55:29,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:29,638 INFO L93 Difference]: Finished difference Result 1180 states and 1640 transitions. [2020-08-18 21:55:29,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:29,638 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 21:55:29,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:29,642 INFO L225 Difference]: With dead ends: 1180 [2020-08-18 21:55:29,642 INFO L226 Difference]: Without dead ends: 682 [2020-08-18 21:55:29,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:29,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2020-08-18 21:55:29,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 680. [2020-08-18 21:55:29,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 680 states. [2020-08-18 21:55:29,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 918 transitions. [2020-08-18 21:55:29,668 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 918 transitions. Word has length 21 [2020-08-18 21:55:29,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:29,668 INFO L479 AbstractCegarLoop]: Abstraction has 680 states and 918 transitions. [2020-08-18 21:55:29,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:29,669 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 918 transitions. [2020-08-18 21:55:29,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 21:55:29,671 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:29,671 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:55:29,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 21:55:29,671 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:29,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:29,672 INFO L82 PathProgramCache]: Analyzing trace with hash -674531426, now seen corresponding path program 1 times [2020-08-18 21:55:29,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:29,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1121744534] [2020-08-18 21:55:29,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:29,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:29,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:29,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:29,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:29,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1121744534] [2020-08-18 21:55:29,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:29,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:29,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046133214] [2020-08-18 21:55:29,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:29,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:29,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:29,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:29,697 INFO L87 Difference]: Start difference. First operand 680 states and 918 transitions. Second operand 3 states. [2020-08-18 21:55:29,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:29,724 INFO L93 Difference]: Finished difference Result 1020 states and 1368 transitions. [2020-08-18 21:55:29,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:29,725 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 21:55:29,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:29,729 INFO L225 Difference]: With dead ends: 1020 [2020-08-18 21:55:29,729 INFO L226 Difference]: Without dead ends: 698 [2020-08-18 21:55:29,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:29,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2020-08-18 21:55:29,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 696. [2020-08-18 21:55:29,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 696 states. [2020-08-18 21:55:29,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 918 transitions. [2020-08-18 21:55:29,755 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 918 transitions. Word has length 22 [2020-08-18 21:55:29,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:29,756 INFO L479 AbstractCegarLoop]: Abstraction has 696 states and 918 transitions. [2020-08-18 21:55:29,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:29,756 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 918 transitions. [2020-08-18 21:55:29,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 21:55:29,758 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:29,758 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:55:29,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 21:55:29,759 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:29,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:29,759 INFO L82 PathProgramCache]: Analyzing trace with hash 26533152, now seen corresponding path program 1 times [2020-08-18 21:55:29,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:29,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [951388122] [2020-08-18 21:55:29,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:29,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:29,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:29,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:29,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:29,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [951388122] [2020-08-18 21:55:29,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:29,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:29,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712700131] [2020-08-18 21:55:29,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:29,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:29,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:29,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:29,786 INFO L87 Difference]: Start difference. First operand 696 states and 918 transitions. Second operand 3 states. [2020-08-18 21:55:29,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:29,823 INFO L93 Difference]: Finished difference Result 1164 states and 1544 transitions. [2020-08-18 21:55:29,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:29,823 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 21:55:29,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:29,830 INFO L225 Difference]: With dead ends: 1164 [2020-08-18 21:55:29,830 INFO L226 Difference]: Without dead ends: 1162 [2020-08-18 21:55:29,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:29,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2020-08-18 21:55:29,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1032. [2020-08-18 21:55:29,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1032 states. [2020-08-18 21:55:29,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1318 transitions. [2020-08-18 21:55:29,871 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1318 transitions. Word has length 22 [2020-08-18 21:55:29,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:29,871 INFO L479 AbstractCegarLoop]: Abstraction has 1032 states and 1318 transitions. [2020-08-18 21:55:29,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:29,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1318 transitions. [2020-08-18 21:55:29,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 21:55:29,874 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:29,874 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:55:29,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 21:55:29,875 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:29,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:29,875 INFO L82 PathProgramCache]: Analyzing trace with hash -366493858, now seen corresponding path program 1 times [2020-08-18 21:55:29,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:29,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549753693] [2020-08-18 21:55:29,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:29,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:29,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:29,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:29,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:29,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [549753693] [2020-08-18 21:55:29,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:29,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:29,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696714280] [2020-08-18 21:55:29,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:29,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:29,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:29,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:29,900 INFO L87 Difference]: Start difference. First operand 1032 states and 1318 transitions. Second operand 3 states. [2020-08-18 21:55:29,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:29,960 INFO L93 Difference]: Finished difference Result 2316 states and 2920 transitions. [2020-08-18 21:55:29,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:29,961 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 21:55:29,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:29,967 INFO L225 Difference]: With dead ends: 2316 [2020-08-18 21:55:29,968 INFO L226 Difference]: Without dead ends: 1322 [2020-08-18 21:55:29,970 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:29,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2020-08-18 21:55:30,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 1320. [2020-08-18 21:55:30,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1320 states. [2020-08-18 21:55:30,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1606 transitions. [2020-08-18 21:55:30,014 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 1606 transitions. Word has length 22 [2020-08-18 21:55:30,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:30,014 INFO L479 AbstractCegarLoop]: Abstraction has 1320 states and 1606 transitions. [2020-08-18 21:55:30,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:30,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 1606 transitions. [2020-08-18 21:55:30,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 21:55:30,017 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:30,017 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:55:30,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 21:55:30,018 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:30,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:30,018 INFO L82 PathProgramCache]: Analyzing trace with hash 822743769, now seen corresponding path program 1 times [2020-08-18 21:55:30,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:30,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [749439271] [2020-08-18 21:55:30,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:30,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:30,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:30,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:30,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:30,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [749439271] [2020-08-18 21:55:30,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:30,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:30,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77460616] [2020-08-18 21:55:30,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:30,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:30,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:30,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:30,040 INFO L87 Difference]: Start difference. First operand 1320 states and 1606 transitions. Second operand 3 states. [2020-08-18 21:55:30,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:30,076 INFO L93 Difference]: Finished difference Result 1980 states and 2392 transitions. [2020-08-18 21:55:30,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:30,077 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 21:55:30,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:30,084 INFO L225 Difference]: With dead ends: 1980 [2020-08-18 21:55:30,084 INFO L226 Difference]: Without dead ends: 1354 [2020-08-18 21:55:30,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:30,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2020-08-18 21:55:30,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1352. [2020-08-18 21:55:30,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1352 states. [2020-08-18 21:55:30,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 1606 transitions. [2020-08-18 21:55:30,133 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 1606 transitions. Word has length 23 [2020-08-18 21:55:30,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:30,133 INFO L479 AbstractCegarLoop]: Abstraction has 1352 states and 1606 transitions. [2020-08-18 21:55:30,133 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:30,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 1606 transitions. [2020-08-18 21:55:30,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 21:55:30,136 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:30,137 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:55:30,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 21:55:30,137 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:30,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:30,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1523808347, now seen corresponding path program 1 times [2020-08-18 21:55:30,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:30,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [655263564] [2020-08-18 21:55:30,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:30,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:30,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:30,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:30,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:30,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [655263564] [2020-08-18 21:55:30,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:30,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:30,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528939680] [2020-08-18 21:55:30,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:30,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:30,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:30,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:30,161 INFO L87 Difference]: Start difference. First operand 1352 states and 1606 transitions. Second operand 3 states. [2020-08-18 21:55:30,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:30,218 INFO L93 Difference]: Finished difference Result 2186 states and 2567 transitions. [2020-08-18 21:55:30,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:30,219 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 21:55:30,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:30,234 INFO L225 Difference]: With dead ends: 2186 [2020-08-18 21:55:30,234 INFO L226 Difference]: Without dead ends: 2184 [2020-08-18 21:55:30,235 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:30,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2020-08-18 21:55:30,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 2056. [2020-08-18 21:55:30,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2056 states. [2020-08-18 21:55:30,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2056 states to 2056 states and 2374 transitions. [2020-08-18 21:55:30,319 INFO L78 Accepts]: Start accepts. Automaton has 2056 states and 2374 transitions. Word has length 23 [2020-08-18 21:55:30,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:30,320 INFO L479 AbstractCegarLoop]: Abstraction has 2056 states and 2374 transitions. [2020-08-18 21:55:30,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:30,320 INFO L276 IsEmpty]: Start isEmpty. Operand 2056 states and 2374 transitions. [2020-08-18 21:55:30,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 21:55:30,327 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:30,327 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:55:30,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 21:55:30,327 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:30,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:30,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1130781337, now seen corresponding path program 1 times [2020-08-18 21:55:30,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:30,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [355962705] [2020-08-18 21:55:30,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:30,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:30,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:30,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:30,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:30,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [355962705] [2020-08-18 21:55:30,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:30,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:30,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306092707] [2020-08-18 21:55:30,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:30,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:30,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:30,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:30,354 INFO L87 Difference]: Start difference. First operand 2056 states and 2374 transitions. Second operand 3 states. [2020-08-18 21:55:30,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:30,443 INFO L93 Difference]: Finished difference Result 4552 states and 5126 transitions. [2020-08-18 21:55:30,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:30,444 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 21:55:30,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:30,445 INFO L225 Difference]: With dead ends: 4552 [2020-08-18 21:55:30,445 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 21:55:30,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:30,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 21:55:30,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 21:55:30,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 21:55:30,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 21:55:30,459 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2020-08-18 21:55:30,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:30,459 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 21:55:30,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:30,460 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 21:55:30,460 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 21:55:30,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 21:55:30,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 21:55:30,491 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 21:55:30,492 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 21:55:30,492 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 21:55:30,492 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 21:55:30,492 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 21:55:30,493 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 21:55:30,493 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 121) no Hoare annotation was computed. [2020-08-18 21:55:30,493 INFO L268 CegarLoopResult]: For program point L102(line 102) no Hoare annotation was computed. [2020-08-18 21:55:30,493 INFO L268 CegarLoopResult]: For program point L86-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 21:55:30,493 INFO L271 CegarLoopResult]: At program point L111-1(lines 30 116) the Hoare annotation is: true [2020-08-18 21:55:30,494 INFO L268 CegarLoopResult]: For program point L87(line 87) no Hoare annotation was computed. [2020-08-18 21:55:30,494 INFO L268 CegarLoopResult]: For program point L112(line 112) no Hoare annotation was computed. [2020-08-18 21:55:30,494 INFO L264 CegarLoopResult]: At program point L112-1(lines 5 121) the Hoare annotation is: false [2020-08-18 21:55:30,494 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 121) no Hoare annotation was computed. [2020-08-18 21:55:30,494 INFO L268 CegarLoopResult]: For program point L71-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 21:55:30,495 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 119) no Hoare annotation was computed. [2020-08-18 21:55:30,495 INFO L268 CegarLoopResult]: For program point L96-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 21:55:30,495 INFO L268 CegarLoopResult]: For program point L63-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 21:55:30,495 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 121) the Hoare annotation is: true [2020-08-18 21:55:30,496 INFO L268 CegarLoopResult]: For program point L55-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 21:55:30,496 INFO L268 CegarLoopResult]: For program point L97(line 97) no Hoare annotation was computed. [2020-08-18 21:55:30,496 INFO L268 CegarLoopResult]: For program point L81-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 21:55:30,496 INFO L268 CegarLoopResult]: For program point L106-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 21:55:30,496 INFO L268 CegarLoopResult]: For program point L32(lines 32 34) no Hoare annotation was computed. [2020-08-18 21:55:30,497 INFO L268 CegarLoopResult]: For program point L82(line 82) no Hoare annotation was computed. [2020-08-18 21:55:30,497 INFO L268 CegarLoopResult]: For program point L107(line 107) no Hoare annotation was computed. [2020-08-18 21:55:30,497 INFO L268 CegarLoopResult]: For program point L91-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 21:55:30,497 INFO L268 CegarLoopResult]: For program point L75-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 21:55:30,497 INFO L268 CegarLoopResult]: For program point L67-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 21:55:30,497 INFO L268 CegarLoopResult]: For program point L92(line 92) no Hoare annotation was computed. [2020-08-18 21:55:30,497 INFO L268 CegarLoopResult]: For program point L59-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 21:55:30,498 INFO L271 CegarLoopResult]: At program point L117(lines 5 121) the Hoare annotation is: true [2020-08-18 21:55:30,498 INFO L268 CegarLoopResult]: For program point L51(lines 51 53) no Hoare annotation was computed. [2020-08-18 21:55:30,498 INFO L268 CegarLoopResult]: For program point L51-2(lines 30 116) no Hoare annotation was computed. [2020-08-18 21:55:30,498 INFO L268 CegarLoopResult]: For program point L101-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 21:55:30,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 09:55:30 BoogieIcfgContainer [2020-08-18 21:55:30,515 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 21:55:30,522 INFO L168 Benchmark]: Toolchain (without parser) took 3488.22 ms. Allocated memory was 145.2 MB in the beginning and 250.1 MB in the end (delta: 104.9 MB). Free memory was 99.7 MB in the beginning and 104.4 MB in the end (delta: -4.7 MB). Peak memory consumption was 100.2 MB. Max. memory is 7.1 GB. [2020-08-18 21:55:30,523 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 145.2 MB. Free memory was 118.5 MB in the beginning and 118.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 21:55:30,523 INFO L168 Benchmark]: CACSL2BoogieTranslator took 276.85 ms. Allocated memory is still 145.2 MB. Free memory was 99.3 MB in the beginning and 89.1 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-08-18 21:55:30,524 INFO L168 Benchmark]: Boogie Preprocessor took 128.57 ms. Allocated memory was 145.2 MB in the beginning and 201.3 MB in the end (delta: 56.1 MB). Free memory was 89.1 MB in the beginning and 179.2 MB in the end (delta: -90.1 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-08-18 21:55:30,525 INFO L168 Benchmark]: RCFGBuilder took 345.46 ms. Allocated memory is still 201.3 MB. Free memory was 179.2 MB in the beginning and 162.6 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 7.1 GB. [2020-08-18 21:55:30,525 INFO L168 Benchmark]: TraceAbstraction took 2731.61 ms. Allocated memory was 201.3 MB in the beginning and 250.1 MB in the end (delta: 48.8 MB). Free memory was 161.9 MB in the beginning and 104.4 MB in the end (delta: 57.5 MB). Peak memory consumption was 106.2 MB. Max. memory is 7.1 GB. [2020-08-18 21:55:30,533 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 145.2 MB. Free memory was 118.5 MB in the beginning and 118.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 276.85 ms. Allocated memory is still 145.2 MB. Free memory was 99.3 MB in the beginning and 89.1 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 128.57 ms. Allocated memory was 145.2 MB in the beginning and 201.3 MB in the end (delta: 56.1 MB). Free memory was 89.1 MB in the beginning and 179.2 MB in the end (delta: -90.1 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 345.46 ms. Allocated memory is still 201.3 MB. Free memory was 179.2 MB in the beginning and 162.6 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2731.61 ms. Allocated memory was 201.3 MB in the beginning and 250.1 MB in the end (delta: 48.8 MB). Free memory was 161.9 MB in the beginning and 104.4 MB in the end (delta: 57.5 MB). Peak memory consumption was 106.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 119]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.6s, OverallIterations: 20, TraceHistogramMax: 1, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1238 SDtfs, 574 SDslu, 829 SDs, 0 SdLazy, 107 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 100 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2056occurred in iteration=19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 20 MinimizatonAttempts, 530 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 138 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 403 NumberOfCodeBlocks, 403 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 383 ConstructedInterpolants, 0 QuantifiedInterpolants, 13856 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 20 InterpolantComputations, 20 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...