/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 22:11:04,908 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 22:11:04,910 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 22:11:04,934 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-21 22:11:04,944 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 22:11:04,945 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 22:11:04,947 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 22:11:04,948 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 22:11:04,949 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 22:11:04,949 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 22:11:04,951 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 22:11:04,953 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 22:11:04,955 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 22:11:04,956 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 22:11:04,957 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 22:11:04,958 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 22:11:04,961 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 22:11:04,978 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 [2020-08-21 22:11:05,026 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 22:11:05,027 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 22:11:05,028 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 22:11:05,030 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 22:11:05,030 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 22:11:05,030 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 22:11:05,031 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 22:11:05,031 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 22:11:05,031 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 22:11:05,031 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 22:11:05,031 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 22:11:05,032 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 22:11:05,032 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 22:11:05,032 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 22:11:05,032 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 22:11:05,032 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 22:11:05,033 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 22:11:05,034 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 22:11:05,034 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 22:11:05,034 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 22:11:05,034 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 22:11:05,034 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 22:11:05,035 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 22:11:05,035 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 22:11:05,035 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 22:11:05,035 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 22:11:05,035 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 22:11:05,035 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 22:11:05,036 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 22:11:05,036 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=5000;interpolation-heuristic=WIDEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; [2020-08-21 22:11:05,338 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 22:11:05,354 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 22:11:05,359 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 22:11:05,366 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 22:11:05,366 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 22:11:05,368 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_11.c [2020-08-21 22:11:05,440 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c7a45d380/795166506ed148e7a736c62925c490cf/FLAG34fbebdea [2020-08-21 22:11:05,918 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 22:11:05,918 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_11.c [2020-08-21 22:11:05,933 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c7a45d380/795166506ed148e7a736c62925c490cf/FLAG34fbebdea [2020-08-21 22:11:06,299 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c7a45d380/795166506ed148e7a736c62925c490cf [2020-08-21 22:11:06,307 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 22:11:06,309 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 22:11:06,310 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 22:11:06,310 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 22:11:06,314 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 22:11:06,315 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:11:06" (1/1) ... [2020-08-21 22:11:06,318 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72dcb5c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:11:06, skipping insertion in model container [2020-08-21 22:11:06,318 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:11:06" (1/1) ... [2020-08-21 22:11:06,327 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 22:11:06,353 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 22:11:06,568 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 22:11:06,572 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 22:11:06,597 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 22:11:06,610 INFO L208 MainTranslator]: Completed translation [2020-08-21 22:11:06,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:11:06 WrapperNode [2020-08-21 22:11:06,611 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 22:11:06,612 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 22:11:06,612 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 22:11:06,612 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 22:11:06,692 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:11:06" (1/1) ... [2020-08-21 22:11:06,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:11:06" (1/1) ... [2020-08-21 22:11:06,699 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:11:06" (1/1) ... [2020-08-21 22:11:06,699 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:11:06" (1/1) ... [2020-08-21 22:11:06,705 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:11:06" (1/1) ... [2020-08-21 22:11:06,713 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:11:06" (1/1) ... [2020-08-21 22:11:06,715 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:11:06" (1/1) ... [2020-08-21 22:11:06,718 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 22:11:06,719 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 22:11:06,719 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 22:11:06,719 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 22:11:06,720 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:11:06" (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 [2020-08-21 22:11:06,784 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 22:11:06,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 22:11:06,785 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 22:11:06,785 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 22:11:06,785 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 22:11:06,785 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 22:11:06,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 22:11:06,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 22:11:07,135 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 22:11:07,136 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 22:11:07,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:11:07 BoogieIcfgContainer [2020-08-21 22:11:07,141 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 22:11:07,148 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 22:11:07,149 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 22:11:07,153 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 22:11:07,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 10:11:06" (1/3) ... [2020-08-21 22:11:07,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f73bd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:11:07, skipping insertion in model container [2020-08-21 22:11:07,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:11:06" (2/3) ... [2020-08-21 22:11:07,155 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f73bd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:11:07, skipping insertion in model container [2020-08-21 22:11:07,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:11:07" (3/3) ... [2020-08-21 22:11:07,157 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_11.c [2020-08-21 22:11:07,194 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 22:11:07,207 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 22:11:07,218 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 22:11:07,241 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 22:11:07,241 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 22:11:07,241 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 22:11:07,241 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 22:11:07,241 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 22:11:07,242 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 22:11:07,242 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 22:11:07,242 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 22:11:07,259 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-08-21 22:11:07,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 22:11:07,265 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:07,266 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] [2020-08-21 22:11:07,266 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:07,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:07,271 INFO L82 PathProgramCache]: Analyzing trace with hash -316470182, now seen corresponding path program 1 times [2020-08-21 22:11:07,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:07,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1711038095] [2020-08-21 22:11:07,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:07,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:07,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:07,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:07,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:07,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1711038095] [2020-08-21 22:11:07,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:07,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:07,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641333151] [2020-08-21 22:11:07,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:07,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:07,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:07,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:07,516 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 3 states. [2020-08-21 22:11:07,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:07,599 INFO L93 Difference]: Finished difference Result 93 states and 162 transitions. [2020-08-21 22:11:07,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:07,602 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 22:11:07,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:07,624 INFO L225 Difference]: With dead ends: 93 [2020-08-21 22:11:07,624 INFO L226 Difference]: Without dead ends: 78 [2020-08-21 22:11:07,632 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 [2020-08-21 22:11:07,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-21 22:11:07,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 54. [2020-08-21 22:11:07,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-21 22:11:07,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 97 transitions. [2020-08-21 22:11:07,699 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 97 transitions. Word has length 21 [2020-08-21 22:11:07,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:07,700 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 97 transitions. [2020-08-21 22:11:07,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:07,701 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 97 transitions. [2020-08-21 22:11:07,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 22:11:07,703 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:07,704 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] [2020-08-21 22:11:07,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 22:11:07,705 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:07,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:07,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1327587432, now seen corresponding path program 1 times [2020-08-21 22:11:07,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:07,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203224166] [2020-08-21 22:11:07,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:07,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:07,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:07,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:07,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:07,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203224166] [2020-08-21 22:11:07,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:07,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:07,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610228207] [2020-08-21 22:11:07,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:07,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:07,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:07,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:07,836 INFO L87 Difference]: Start difference. First operand 54 states and 97 transitions. Second operand 3 states. [2020-08-21 22:11:07,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:07,870 INFO L93 Difference]: Finished difference Result 127 states and 232 transitions. [2020-08-21 22:11:07,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:07,871 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 22:11:07,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:07,873 INFO L225 Difference]: With dead ends: 127 [2020-08-21 22:11:07,873 INFO L226 Difference]: Without dead ends: 78 [2020-08-21 22:11:07,874 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 [2020-08-21 22:11:07,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-21 22:11:07,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-08-21 22:11:07,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-21 22:11:07,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 137 transitions. [2020-08-21 22:11:07,886 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 137 transitions. Word has length 21 [2020-08-21 22:11:07,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:07,886 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 137 transitions. [2020-08-21 22:11:07,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:07,887 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 137 transitions. [2020-08-21 22:11:07,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 22:11:07,888 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:07,888 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] [2020-08-21 22:11:07,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 22:11:07,889 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:07,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:07,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1220427994, now seen corresponding path program 1 times [2020-08-21 22:11:07,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:07,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [548890355] [2020-08-21 22:11:07,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:07,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:07,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:07,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:07,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:07,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [548890355] [2020-08-21 22:11:07,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:07,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:07,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009039422] [2020-08-21 22:11:07,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:07,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:07,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:07,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:07,949 INFO L87 Difference]: Start difference. First operand 76 states and 137 transitions. Second operand 3 states. [2020-08-21 22:11:07,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:07,971 INFO L93 Difference]: Finished difference Result 117 states and 207 transitions. [2020-08-21 22:11:07,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:07,972 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 22:11:07,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:07,974 INFO L225 Difference]: With dead ends: 117 [2020-08-21 22:11:07,974 INFO L226 Difference]: Without dead ends: 81 [2020-08-21 22:11:07,975 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 [2020-08-21 22:11:07,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-08-21 22:11:07,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2020-08-21 22:11:07,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-21 22:11:07,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 139 transitions. [2020-08-21 22:11:07,985 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 139 transitions. Word has length 22 [2020-08-21 22:11:07,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:07,985 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 139 transitions. [2020-08-21 22:11:07,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:07,986 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 139 transitions. [2020-08-21 22:11:07,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 22:11:07,987 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:07,987 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] [2020-08-21 22:11:07,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 22:11:07,987 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:07,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:07,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1794675624, now seen corresponding path program 1 times [2020-08-21 22:11:07,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:07,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [762983846] [2020-08-21 22:11:07,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:08,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:08,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:08,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:08,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:08,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [762983846] [2020-08-21 22:11:08,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:08,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:08,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593873156] [2020-08-21 22:11:08,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:08,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:08,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:08,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:08,067 INFO L87 Difference]: Start difference. First operand 79 states and 139 transitions. Second operand 3 states. [2020-08-21 22:11:08,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:08,091 INFO L93 Difference]: Finished difference Result 148 states and 264 transitions. [2020-08-21 22:11:08,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:08,092 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 22:11:08,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:08,094 INFO L225 Difference]: With dead ends: 148 [2020-08-21 22:11:08,094 INFO L226 Difference]: Without dead ends: 146 [2020-08-21 22:11:08,095 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 [2020-08-21 22:11:08,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-08-21 22:11:08,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 104. [2020-08-21 22:11:08,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-08-21 22:11:08,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 184 transitions. [2020-08-21 22:11:08,109 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 184 transitions. Word has length 22 [2020-08-21 22:11:08,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:08,109 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 184 transitions. [2020-08-21 22:11:08,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:08,110 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 184 transitions. [2020-08-21 22:11:08,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 22:11:08,111 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:08,111 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] [2020-08-21 22:11:08,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 22:11:08,112 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:08,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:08,112 INFO L82 PathProgramCache]: Analyzing trace with hash 783558374, now seen corresponding path program 1 times [2020-08-21 22:11:08,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:08,113 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1407803558] [2020-08-21 22:11:08,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:08,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:08,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:08,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:08,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:08,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1407803558] [2020-08-21 22:11:08,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:08,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:08,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603829055] [2020-08-21 22:11:08,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:08,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:08,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:08,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:08,156 INFO L87 Difference]: Start difference. First operand 104 states and 184 transitions. Second operand 3 states. [2020-08-21 22:11:08,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:08,180 INFO L93 Difference]: Finished difference Result 244 states and 438 transitions. [2020-08-21 22:11:08,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:08,181 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 22:11:08,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:08,183 INFO L225 Difference]: With dead ends: 244 [2020-08-21 22:11:08,183 INFO L226 Difference]: Without dead ends: 148 [2020-08-21 22:11:08,184 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 [2020-08-21 22:11:08,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-08-21 22:11:08,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2020-08-21 22:11:08,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-08-21 22:11:08,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 258 transitions. [2020-08-21 22:11:08,199 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 258 transitions. Word has length 22 [2020-08-21 22:11:08,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:08,199 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 258 transitions. [2020-08-21 22:11:08,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:08,200 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 258 transitions. [2020-08-21 22:11:08,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 22:11:08,201 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:08,202 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] [2020-08-21 22:11:08,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 22:11:08,202 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:08,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:08,203 INFO L82 PathProgramCache]: Analyzing trace with hash -199417107, now seen corresponding path program 1 times [2020-08-21 22:11:08,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:08,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925191523] [2020-08-21 22:11:08,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:08,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:08,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:08,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:08,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:08,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [925191523] [2020-08-21 22:11:08,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:08,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:08,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087120428] [2020-08-21 22:11:08,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:08,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:08,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:08,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:08,271 INFO L87 Difference]: Start difference. First operand 146 states and 258 transitions. Second operand 3 states. [2020-08-21 22:11:08,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:08,314 INFO L93 Difference]: Finished difference Result 219 states and 385 transitions. [2020-08-21 22:11:08,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:08,330 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 22:11:08,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:08,331 INFO L225 Difference]: With dead ends: 219 [2020-08-21 22:11:08,331 INFO L226 Difference]: Without dead ends: 150 [2020-08-21 22:11:08,337 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 [2020-08-21 22:11:08,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-21 22:11:08,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2020-08-21 22:11:08,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-08-21 22:11:08,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 258 transitions. [2020-08-21 22:11:08,364 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 258 transitions. Word has length 23 [2020-08-21 22:11:08,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:08,364 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 258 transitions. [2020-08-21 22:11:08,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:08,365 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 258 transitions. [2020-08-21 22:11:08,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 22:11:08,369 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:08,369 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] [2020-08-21 22:11:08,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 22:11:08,371 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:08,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:08,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1479280785, now seen corresponding path program 1 times [2020-08-21 22:11:08,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:08,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [431444406] [2020-08-21 22:11:08,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:08,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:08,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:08,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:08,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:08,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [431444406] [2020-08-21 22:11:08,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:08,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:08,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256101282] [2020-08-21 22:11:08,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:08,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:08,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:08,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:08,446 INFO L87 Difference]: Start difference. First operand 148 states and 258 transitions. Second operand 3 states. [2020-08-21 22:11:08,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:08,465 INFO L93 Difference]: Finished difference Result 276 states and 488 transitions. [2020-08-21 22:11:08,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:08,465 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 22:11:08,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:08,468 INFO L225 Difference]: With dead ends: 276 [2020-08-21 22:11:08,468 INFO L226 Difference]: Without dead ends: 274 [2020-08-21 22:11:08,469 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 [2020-08-21 22:11:08,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-08-21 22:11:08,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 200. [2020-08-21 22:11:08,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-08-21 22:11:08,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 346 transitions. [2020-08-21 22:11:08,483 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 346 transitions. Word has length 23 [2020-08-21 22:11:08,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:08,484 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 346 transitions. [2020-08-21 22:11:08,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:08,484 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 346 transitions. [2020-08-21 22:11:08,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 22:11:08,486 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:08,486 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] [2020-08-21 22:11:08,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 22:11:08,486 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:08,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:08,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1804569261, now seen corresponding path program 1 times [2020-08-21 22:11:08,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:08,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1353266106] [2020-08-21 22:11:08,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:08,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:08,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:08,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:08,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:08,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1353266106] [2020-08-21 22:11:08,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:08,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:08,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483615534] [2020-08-21 22:11:08,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:08,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:08,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:08,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:08,519 INFO L87 Difference]: Start difference. First operand 200 states and 346 transitions. Second operand 3 states. [2020-08-21 22:11:08,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:08,541 INFO L93 Difference]: Finished difference Result 472 states and 824 transitions. [2020-08-21 22:11:08,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:08,542 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 22:11:08,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:08,544 INFO L225 Difference]: With dead ends: 472 [2020-08-21 22:11:08,544 INFO L226 Difference]: Without dead ends: 282 [2020-08-21 22:11:08,545 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 [2020-08-21 22:11:08,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-08-21 22:11:08,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 280. [2020-08-21 22:11:08,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-08-21 22:11:08,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 482 transitions. [2020-08-21 22:11:08,562 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 482 transitions. Word has length 23 [2020-08-21 22:11:08,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:08,562 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 482 transitions. [2020-08-21 22:11:08,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:08,563 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 482 transitions. [2020-08-21 22:11:08,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 22:11:08,564 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:08,565 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:08,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 22:11:08,565 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:08,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:08,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1387149659, now seen corresponding path program 1 times [2020-08-21 22:11:08,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:08,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2105232147] [2020-08-21 22:11:08,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:08,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:08,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:08,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:08,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:08,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2105232147] [2020-08-21 22:11:08,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:08,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:08,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844678074] [2020-08-21 22:11:08,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:08,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:08,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:08,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:08,603 INFO L87 Difference]: Start difference. First operand 280 states and 482 transitions. Second operand 3 states. [2020-08-21 22:11:08,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:08,628 INFO L93 Difference]: Finished difference Result 420 states and 720 transitions. [2020-08-21 22:11:08,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:08,629 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 22:11:08,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:08,631 INFO L225 Difference]: With dead ends: 420 [2020-08-21 22:11:08,631 INFO L226 Difference]: Without dead ends: 286 [2020-08-21 22:11:08,632 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 [2020-08-21 22:11:08,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-08-21 22:11:08,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 284. [2020-08-21 22:11:08,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-08-21 22:11:08,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 482 transitions. [2020-08-21 22:11:08,646 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 482 transitions. Word has length 24 [2020-08-21 22:11:08,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:08,646 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 482 transitions. [2020-08-21 22:11:08,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:08,647 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 482 transitions. [2020-08-21 22:11:08,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 22:11:08,648 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:08,649 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:08,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 22:11:08,649 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:08,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:08,650 INFO L82 PathProgramCache]: Analyzing trace with hash 107285981, now seen corresponding path program 1 times [2020-08-21 22:11:08,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:08,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [494685700] [2020-08-21 22:11:08,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:08,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:08,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:08,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:08,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:08,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [494685700] [2020-08-21 22:11:08,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:08,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:08,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052210995] [2020-08-21 22:11:08,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:08,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:08,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:08,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:08,679 INFO L87 Difference]: Start difference. First operand 284 states and 482 transitions. Second operand 3 states. [2020-08-21 22:11:08,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:08,712 INFO L93 Difference]: Finished difference Result 524 states and 904 transitions. [2020-08-21 22:11:08,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:08,713 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 22:11:08,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:08,716 INFO L225 Difference]: With dead ends: 524 [2020-08-21 22:11:08,716 INFO L226 Difference]: Without dead ends: 522 [2020-08-21 22:11:08,717 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 [2020-08-21 22:11:08,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2020-08-21 22:11:08,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 392. [2020-08-21 22:11:08,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-08-21 22:11:08,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 654 transitions. [2020-08-21 22:11:08,735 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 654 transitions. Word has length 24 [2020-08-21 22:11:08,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:08,737 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 654 transitions. [2020-08-21 22:11:08,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:08,737 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 654 transitions. [2020-08-21 22:11:08,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 22:11:08,740 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:08,740 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:08,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 22:11:08,740 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:08,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:08,741 INFO L82 PathProgramCache]: Analyzing trace with hash -903831269, now seen corresponding path program 1 times [2020-08-21 22:11:08,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:08,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684387420] [2020-08-21 22:11:08,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:08,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:08,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:08,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:08,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:08,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [684387420] [2020-08-21 22:11:08,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:08,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:08,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134118801] [2020-08-21 22:11:08,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:08,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:08,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:08,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:08,791 INFO L87 Difference]: Start difference. First operand 392 states and 654 transitions. Second operand 3 states. [2020-08-21 22:11:08,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:08,838 INFO L93 Difference]: Finished difference Result 924 states and 1552 transitions. [2020-08-21 22:11:08,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:08,839 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 22:11:08,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:08,843 INFO L225 Difference]: With dead ends: 924 [2020-08-21 22:11:08,843 INFO L226 Difference]: Without dead ends: 546 [2020-08-21 22:11:08,845 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 [2020-08-21 22:11:08,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2020-08-21 22:11:08,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 544. [2020-08-21 22:11:08,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2020-08-21 22:11:08,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 902 transitions. [2020-08-21 22:11:08,871 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 902 transitions. Word has length 24 [2020-08-21 22:11:08,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:08,871 INFO L479 AbstractCegarLoop]: Abstraction has 544 states and 902 transitions. [2020-08-21 22:11:08,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:08,872 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 902 transitions. [2020-08-21 22:11:08,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 22:11:08,876 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:08,877 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:08,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 22:11:08,878 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:08,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:08,878 INFO L82 PathProgramCache]: Analyzing trace with hash -968887806, now seen corresponding path program 1 times [2020-08-21 22:11:08,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:08,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1917852588] [2020-08-21 22:11:08,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:08,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:08,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:08,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:08,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:08,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1917852588] [2020-08-21 22:11:08,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:08,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:08,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060304606] [2020-08-21 22:11:08,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:08,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:08,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:08,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:08,928 INFO L87 Difference]: Start difference. First operand 544 states and 902 transitions. Second operand 3 states. [2020-08-21 22:11:08,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:08,959 INFO L93 Difference]: Finished difference Result 816 states and 1348 transitions. [2020-08-21 22:11:08,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:08,960 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 22:11:08,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:08,966 INFO L225 Difference]: With dead ends: 816 [2020-08-21 22:11:08,966 INFO L226 Difference]: Without dead ends: 554 [2020-08-21 22:11:08,968 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 [2020-08-21 22:11:08,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-08-21 22:11:08,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 552. [2020-08-21 22:11:08,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 552 states. [2020-08-21 22:11:08,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 902 transitions. [2020-08-21 22:11:08,993 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 902 transitions. Word has length 25 [2020-08-21 22:11:08,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:08,994 INFO L479 AbstractCegarLoop]: Abstraction has 552 states and 902 transitions. [2020-08-21 22:11:08,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:08,994 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 902 transitions. [2020-08-21 22:11:08,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 22:11:08,995 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:08,995 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:08,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 22:11:08,996 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:08,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:08,996 INFO L82 PathProgramCache]: Analyzing trace with hash 2046215812, now seen corresponding path program 1 times [2020-08-21 22:11:08,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:08,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1697628530] [2020-08-21 22:11:08,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:09,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:09,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:09,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:09,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:09,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1697628530] [2020-08-21 22:11:09,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:09,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:09,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235317785] [2020-08-21 22:11:09,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:09,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:09,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:09,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:09,058 INFO L87 Difference]: Start difference. First operand 552 states and 902 transitions. Second operand 3 states. [2020-08-21 22:11:09,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:09,103 INFO L93 Difference]: Finished difference Result 1004 states and 1672 transitions. [2020-08-21 22:11:09,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:09,105 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 22:11:09,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:09,113 INFO L225 Difference]: With dead ends: 1004 [2020-08-21 22:11:09,113 INFO L226 Difference]: Without dead ends: 1002 [2020-08-21 22:11:09,114 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 [2020-08-21 22:11:09,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2020-08-21 22:11:09,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 776. [2020-08-21 22:11:09,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-08-21 22:11:09,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1238 transitions. [2020-08-21 22:11:09,155 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1238 transitions. Word has length 25 [2020-08-21 22:11:09,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:09,155 INFO L479 AbstractCegarLoop]: Abstraction has 776 states and 1238 transitions. [2020-08-21 22:11:09,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:09,156 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1238 transitions. [2020-08-21 22:11:09,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 22:11:09,158 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:09,159 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:09,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 22:11:09,159 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:09,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:09,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1035098562, now seen corresponding path program 1 times [2020-08-21 22:11:09,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:09,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2058626674] [2020-08-21 22:11:09,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:09,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:09,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:09,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:09,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:09,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2058626674] [2020-08-21 22:11:09,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:09,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:09,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68229140] [2020-08-21 22:11:09,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:09,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:09,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:09,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:09,208 INFO L87 Difference]: Start difference. First operand 776 states and 1238 transitions. Second operand 3 states. [2020-08-21 22:11:09,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:09,245 INFO L93 Difference]: Finished difference Result 1820 states and 2920 transitions. [2020-08-21 22:11:09,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:09,246 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 22:11:09,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:09,252 INFO L225 Difference]: With dead ends: 1820 [2020-08-21 22:11:09,252 INFO L226 Difference]: Without dead ends: 1066 [2020-08-21 22:11:09,255 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 [2020-08-21 22:11:09,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2020-08-21 22:11:09,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 1064. [2020-08-21 22:11:09,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1064 states. [2020-08-21 22:11:09,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1686 transitions. [2020-08-21 22:11:09,294 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1686 transitions. Word has length 25 [2020-08-21 22:11:09,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:09,294 INFO L479 AbstractCegarLoop]: Abstraction has 1064 states and 1686 transitions. [2020-08-21 22:11:09,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:09,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1686 transitions. [2020-08-21 22:11:09,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 22:11:09,298 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:09,298 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:09,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 22:11:09,299 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:09,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:09,299 INFO L82 PathProgramCache]: Analyzing trace with hash -991604848, now seen corresponding path program 1 times [2020-08-21 22:11:09,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:09,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1677848151] [2020-08-21 22:11:09,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:09,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:09,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:09,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:09,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:09,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1677848151] [2020-08-21 22:11:09,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:09,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:09,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345197470] [2020-08-21 22:11:09,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:09,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:09,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:09,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:09,348 INFO L87 Difference]: Start difference. First operand 1064 states and 1686 transitions. Second operand 3 states. [2020-08-21 22:11:09,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:09,384 INFO L93 Difference]: Finished difference Result 1596 states and 2520 transitions. [2020-08-21 22:11:09,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:09,385 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 22:11:09,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:09,390 INFO L225 Difference]: With dead ends: 1596 [2020-08-21 22:11:09,390 INFO L226 Difference]: Without dead ends: 1082 [2020-08-21 22:11:09,393 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 [2020-08-21 22:11:09,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2020-08-21 22:11:09,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1080. [2020-08-21 22:11:09,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1080 states. [2020-08-21 22:11:09,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1686 transitions. [2020-08-21 22:11:09,426 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1686 transitions. Word has length 26 [2020-08-21 22:11:09,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:09,427 INFO L479 AbstractCegarLoop]: Abstraction has 1080 states and 1686 transitions. [2020-08-21 22:11:09,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:09,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1686 transitions. [2020-08-21 22:11:09,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 22:11:09,429 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:09,429 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:09,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 22:11:09,429 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:09,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:09,430 INFO L82 PathProgramCache]: Analyzing trace with hash 2023498770, now seen corresponding path program 1 times [2020-08-21 22:11:09,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:09,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574656401] [2020-08-21 22:11:09,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:09,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:09,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:09,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:09,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:09,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574656401] [2020-08-21 22:11:09,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:09,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:09,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036026342] [2020-08-21 22:11:09,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:09,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:09,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:09,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:09,463 INFO L87 Difference]: Start difference. First operand 1080 states and 1686 transitions. Second operand 3 states. [2020-08-21 22:11:09,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:09,506 INFO L93 Difference]: Finished difference Result 1932 states and 3080 transitions. [2020-08-21 22:11:09,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:09,506 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 22:11:09,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:09,517 INFO L225 Difference]: With dead ends: 1932 [2020-08-21 22:11:09,517 INFO L226 Difference]: Without dead ends: 1930 [2020-08-21 22:11:09,519 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 [2020-08-21 22:11:09,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-21 22:11:09,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1544. [2020-08-21 22:11:09,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1544 states. [2020-08-21 22:11:09,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 2342 transitions. [2020-08-21 22:11:09,573 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 2342 transitions. Word has length 26 [2020-08-21 22:11:09,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:09,573 INFO L479 AbstractCegarLoop]: Abstraction has 1544 states and 2342 transitions. [2020-08-21 22:11:09,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:09,574 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 2342 transitions. [2020-08-21 22:11:09,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 22:11:09,577 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:09,577 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:09,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 22:11:09,578 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:09,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:09,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1012381520, now seen corresponding path program 1 times [2020-08-21 22:11:09,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:09,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1610854144] [2020-08-21 22:11:09,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:09,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:09,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:09,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:09,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:09,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1610854144] [2020-08-21 22:11:09,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:09,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:09,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260590599] [2020-08-21 22:11:09,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:09,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:09,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:09,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:09,611 INFO L87 Difference]: Start difference. First operand 1544 states and 2342 transitions. Second operand 3 states. [2020-08-21 22:11:09,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:09,673 INFO L93 Difference]: Finished difference Result 3596 states and 5480 transitions. [2020-08-21 22:11:09,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:09,674 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 22:11:09,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:09,688 INFO L225 Difference]: With dead ends: 3596 [2020-08-21 22:11:09,688 INFO L226 Difference]: Without dead ends: 2090 [2020-08-21 22:11:09,692 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 [2020-08-21 22:11:09,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2020-08-21 22:11:09,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 2088. [2020-08-21 22:11:09,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2088 states. [2020-08-21 22:11:09,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 3142 transitions. [2020-08-21 22:11:09,767 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 3142 transitions. Word has length 26 [2020-08-21 22:11:09,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:09,768 INFO L479 AbstractCegarLoop]: Abstraction has 2088 states and 3142 transitions. [2020-08-21 22:11:09,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:09,768 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 3142 transitions. [2020-08-21 22:11:09,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 22:11:09,771 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:09,772 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:09,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 22:11:09,772 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:09,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:09,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1695832809, now seen corresponding path program 1 times [2020-08-21 22:11:09,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:09,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1243605922] [2020-08-21 22:11:09,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:09,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:09,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:09,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:09,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:09,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1243605922] [2020-08-21 22:11:09,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:09,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:09,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930476544] [2020-08-21 22:11:09,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:09,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:09,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:09,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:09,805 INFO L87 Difference]: Start difference. First operand 2088 states and 3142 transitions. Second operand 3 states. [2020-08-21 22:11:09,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:09,861 INFO L93 Difference]: Finished difference Result 3132 states and 4696 transitions. [2020-08-21 22:11:09,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:09,862 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-21 22:11:09,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:09,872 INFO L225 Difference]: With dead ends: 3132 [2020-08-21 22:11:09,873 INFO L226 Difference]: Without dead ends: 2122 [2020-08-21 22:11:09,875 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 [2020-08-21 22:11:09,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2020-08-21 22:11:09,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 2120. [2020-08-21 22:11:09,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2120 states. [2020-08-21 22:11:09,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 3142 transitions. [2020-08-21 22:11:09,943 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 3142 transitions. Word has length 27 [2020-08-21 22:11:09,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:09,943 INFO L479 AbstractCegarLoop]: Abstraction has 2120 states and 3142 transitions. [2020-08-21 22:11:09,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:09,944 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 3142 transitions. [2020-08-21 22:11:09,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 22:11:09,977 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:09,978 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:09,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 22:11:09,978 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:09,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:09,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1319270809, now seen corresponding path program 1 times [2020-08-21 22:11:09,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:09,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276269104] [2020-08-21 22:11:09,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:09,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:10,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:10,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:10,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:10,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276269104] [2020-08-21 22:11:10,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:10,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:10,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352688922] [2020-08-21 22:11:10,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:10,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:10,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:10,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:10,014 INFO L87 Difference]: Start difference. First operand 2120 states and 3142 transitions. Second operand 3 states. [2020-08-21 22:11:10,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:10,088 INFO L93 Difference]: Finished difference Result 3724 states and 5640 transitions. [2020-08-21 22:11:10,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:10,089 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-21 22:11:10,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:10,107 INFO L225 Difference]: With dead ends: 3724 [2020-08-21 22:11:10,108 INFO L226 Difference]: Without dead ends: 3722 [2020-08-21 22:11:10,109 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 [2020-08-21 22:11:10,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2020-08-21 22:11:10,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3080. [2020-08-21 22:11:10,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3080 states. [2020-08-21 22:11:10,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3080 states to 3080 states and 4422 transitions. [2020-08-21 22:11:10,197 INFO L78 Accepts]: Start accepts. Automaton has 3080 states and 4422 transitions. Word has length 27 [2020-08-21 22:11:10,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:10,197 INFO L479 AbstractCegarLoop]: Abstraction has 3080 states and 4422 transitions. [2020-08-21 22:11:10,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:10,197 INFO L276 IsEmpty]: Start isEmpty. Operand 3080 states and 4422 transitions. [2020-08-21 22:11:10,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 22:11:10,203 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:10,203 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:10,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 22:11:10,204 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:10,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:10,204 INFO L82 PathProgramCache]: Analyzing trace with hash 308153559, now seen corresponding path program 1 times [2020-08-21 22:11:10,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:10,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1977490336] [2020-08-21 22:11:10,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:10,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:10,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:10,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:10,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:10,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1977490336] [2020-08-21 22:11:10,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:10,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:10,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267110641] [2020-08-21 22:11:10,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:10,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:10,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:10,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:10,238 INFO L87 Difference]: Start difference. First operand 3080 states and 4422 transitions. Second operand 3 states. [2020-08-21 22:11:10,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:10,307 INFO L93 Difference]: Finished difference Result 7116 states and 10248 transitions. [2020-08-21 22:11:10,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:10,307 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-21 22:11:10,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:10,325 INFO L225 Difference]: With dead ends: 7116 [2020-08-21 22:11:10,326 INFO L226 Difference]: Without dead ends: 4106 [2020-08-21 22:11:10,332 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 [2020-08-21 22:11:10,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4106 states. [2020-08-21 22:11:10,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4106 to 4104. [2020-08-21 22:11:10,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4104 states. [2020-08-21 22:11:10,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4104 states to 4104 states and 5830 transitions. [2020-08-21 22:11:10,446 INFO L78 Accepts]: Start accepts. Automaton has 4104 states and 5830 transitions. Word has length 27 [2020-08-21 22:11:10,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:10,446 INFO L479 AbstractCegarLoop]: Abstraction has 4104 states and 5830 transitions. [2020-08-21 22:11:10,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:10,446 INFO L276 IsEmpty]: Start isEmpty. Operand 4104 states and 5830 transitions. [2020-08-21 22:11:10,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 22:11:10,453 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:10,453 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:10,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 22:11:10,456 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:10,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:10,456 INFO L82 PathProgramCache]: Analyzing trace with hash -2052062779, now seen corresponding path program 1 times [2020-08-21 22:11:10,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:10,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377002432] [2020-08-21 22:11:10,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:10,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:10,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:10,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:10,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:10,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377002432] [2020-08-21 22:11:10,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:10,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:10,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290124933] [2020-08-21 22:11:10,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:10,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:10,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:10,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:10,519 INFO L87 Difference]: Start difference. First operand 4104 states and 5830 transitions. Second operand 3 states. [2020-08-21 22:11:10,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:10,588 INFO L93 Difference]: Finished difference Result 6156 states and 8712 transitions. [2020-08-21 22:11:10,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:10,589 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-21 22:11:10,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:10,628 INFO L225 Difference]: With dead ends: 6156 [2020-08-21 22:11:10,628 INFO L226 Difference]: Without dead ends: 4170 [2020-08-21 22:11:10,633 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 [2020-08-21 22:11:10,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4170 states. [2020-08-21 22:11:10,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4170 to 4168. [2020-08-21 22:11:10,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4168 states. [2020-08-21 22:11:10,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4168 states to 4168 states and 5830 transitions. [2020-08-21 22:11:10,757 INFO L78 Accepts]: Start accepts. Automaton has 4168 states and 5830 transitions. Word has length 28 [2020-08-21 22:11:10,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:10,757 INFO L479 AbstractCegarLoop]: Abstraction has 4168 states and 5830 transitions. [2020-08-21 22:11:10,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:10,758 INFO L276 IsEmpty]: Start isEmpty. Operand 4168 states and 5830 transitions. [2020-08-21 22:11:10,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 22:11:10,763 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:10,763 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:10,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 22:11:10,763 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:10,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:10,764 INFO L82 PathProgramCache]: Analyzing trace with hash 963040839, now seen corresponding path program 1 times [2020-08-21 22:11:10,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:10,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [565716477] [2020-08-21 22:11:10,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:10,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:10,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:10,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:10,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:10,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [565716477] [2020-08-21 22:11:10,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:10,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:10,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257921058] [2020-08-21 22:11:10,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:10,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:10,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:10,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:10,794 INFO L87 Difference]: Start difference. First operand 4168 states and 5830 transitions. Second operand 3 states. [2020-08-21 22:11:10,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:10,904 INFO L93 Difference]: Finished difference Result 12108 states and 16712 transitions. [2020-08-21 22:11:10,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:10,904 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-21 22:11:10,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:10,923 INFO L225 Difference]: With dead ends: 12108 [2020-08-21 22:11:10,923 INFO L226 Difference]: Without dead ends: 8074 [2020-08-21 22:11:10,932 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 [2020-08-21 22:11:10,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2020-08-21 22:11:11,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 8072. [2020-08-21 22:11:11,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-08-21 22:11:11,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10886 transitions. [2020-08-21 22:11:11,320 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10886 transitions. Word has length 28 [2020-08-21 22:11:11,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:11,321 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10886 transitions. [2020-08-21 22:11:11,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:11,321 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10886 transitions. [2020-08-21 22:11:11,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 22:11:11,332 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:11,332 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:11,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-21 22:11:11,333 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:11,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:11,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1974158089, now seen corresponding path program 1 times [2020-08-21 22:11:11,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:11,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [222940900] [2020-08-21 22:11:11,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:11,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:11,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:11,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:11,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:11,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [222940900] [2020-08-21 22:11:11,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:11,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:11,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405491164] [2020-08-21 22:11:11,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:11,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:11,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:11,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:11,360 INFO L87 Difference]: Start difference. First operand 8072 states and 10886 transitions. Second operand 3 states. [2020-08-21 22:11:11,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:11,494 INFO L93 Difference]: Finished difference Result 9100 states and 12680 transitions. [2020-08-21 22:11:11,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:11,494 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-21 22:11:11,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:11,513 INFO L225 Difference]: With dead ends: 9100 [2020-08-21 22:11:11,514 INFO L226 Difference]: Without dead ends: 9098 [2020-08-21 22:11:11,518 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 [2020-08-21 22:11:11,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9098 states. [2020-08-21 22:11:11,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9098 to 8072. [2020-08-21 22:11:11,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-08-21 22:11:11,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10758 transitions. [2020-08-21 22:11:11,715 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10758 transitions. Word has length 28 [2020-08-21 22:11:11,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:11,716 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10758 transitions. [2020-08-21 22:11:11,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:11,716 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10758 transitions. [2020-08-21 22:11:11,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-21 22:11:11,726 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:11,726 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:11,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-21 22:11:11,727 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:11,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:11,727 INFO L82 PathProgramCache]: Analyzing trace with hash -210289620, now seen corresponding path program 1 times [2020-08-21 22:11:11,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:11,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [823358963] [2020-08-21 22:11:11,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:11,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:11,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:11,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:11,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:11,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [823358963] [2020-08-21 22:11:11,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:11,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:11,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313142172] [2020-08-21 22:11:11,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:11,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:11,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:11,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:11,749 INFO L87 Difference]: Start difference. First operand 8072 states and 10758 transitions. Second operand 3 states. [2020-08-21 22:11:11,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:11,981 INFO L93 Difference]: Finished difference Result 13708 states and 18568 transitions. [2020-08-21 22:11:11,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:11,982 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-21 22:11:11,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:12,005 INFO L225 Difference]: With dead ends: 13708 [2020-08-21 22:11:12,005 INFO L226 Difference]: Without dead ends: 13706 [2020-08-21 22:11:12,009 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 [2020-08-21 22:11:12,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13706 states. [2020-08-21 22:11:12,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13706 to 12168. [2020-08-21 22:11:12,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12168 states. [2020-08-21 22:11:12,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12168 states to 12168 states and 15750 transitions. [2020-08-21 22:11:12,250 INFO L78 Accepts]: Start accepts. Automaton has 12168 states and 15750 transitions. Word has length 29 [2020-08-21 22:11:12,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:12,251 INFO L479 AbstractCegarLoop]: Abstraction has 12168 states and 15750 transitions. [2020-08-21 22:11:12,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:12,251 INFO L276 IsEmpty]: Start isEmpty. Operand 12168 states and 15750 transitions. [2020-08-21 22:11:12,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-21 22:11:12,269 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:12,270 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:12,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-21 22:11:12,270 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:12,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:12,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1221406870, now seen corresponding path program 1 times [2020-08-21 22:11:12,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:12,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761216589] [2020-08-21 22:11:12,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:12,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:12,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:12,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:12,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:12,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761216589] [2020-08-21 22:11:12,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:12,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:12,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478269289] [2020-08-21 22:11:12,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:12,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:12,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:12,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:12,291 INFO L87 Difference]: Start difference. First operand 12168 states and 15750 transitions. Second operand 3 states. [2020-08-21 22:11:12,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:12,630 INFO L93 Difference]: Finished difference Result 27788 states and 35976 transitions. [2020-08-21 22:11:12,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:12,631 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-21 22:11:12,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:12,658 INFO L225 Difference]: With dead ends: 27788 [2020-08-21 22:11:12,658 INFO L226 Difference]: Without dead ends: 15754 [2020-08-21 22:11:12,678 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 [2020-08-21 22:11:12,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15754 states. [2020-08-21 22:11:12,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15754 to 15752. [2020-08-21 22:11:12,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15752 states. [2020-08-21 22:11:13,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15752 states to 15752 states and 19974 transitions. [2020-08-21 22:11:13,036 INFO L78 Accepts]: Start accepts. Automaton has 15752 states and 19974 transitions. Word has length 29 [2020-08-21 22:11:13,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:13,036 INFO L479 AbstractCegarLoop]: Abstraction has 15752 states and 19974 transitions. [2020-08-21 22:11:13,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:13,037 INFO L276 IsEmpty]: Start isEmpty. Operand 15752 states and 19974 transitions. [2020-08-21 22:11:13,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-21 22:11:13,056 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:13,056 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:13,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-21 22:11:13,056 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:13,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:13,057 INFO L82 PathProgramCache]: Analyzing trace with hash 2071172156, now seen corresponding path program 1 times [2020-08-21 22:11:13,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:13,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1591884814] [2020-08-21 22:11:13,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:13,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:13,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:13,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:13,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:13,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1591884814] [2020-08-21 22:11:13,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:13,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:13,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847864963] [2020-08-21 22:11:13,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:13,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:13,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:13,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:13,085 INFO L87 Difference]: Start difference. First operand 15752 states and 19974 transitions. Second operand 3 states. [2020-08-21 22:11:13,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:13,647 INFO L93 Difference]: Finished difference Result 23820 states and 30216 transitions. [2020-08-21 22:11:13,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:13,648 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-21 22:11:13,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:13,677 INFO L225 Difference]: With dead ends: 23820 [2020-08-21 22:11:13,677 INFO L226 Difference]: Without dead ends: 16138 [2020-08-21 22:11:13,694 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 [2020-08-21 22:11:13,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16138 states. [2020-08-21 22:11:13,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16138 to 16136. [2020-08-21 22:11:13,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16136 states. [2020-08-21 22:11:13,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16136 states to 16136 states and 20230 transitions. [2020-08-21 22:11:13,997 INFO L78 Accepts]: Start accepts. Automaton has 16136 states and 20230 transitions. Word has length 30 [2020-08-21 22:11:13,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:13,997 INFO L479 AbstractCegarLoop]: Abstraction has 16136 states and 20230 transitions. [2020-08-21 22:11:13,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:13,998 INFO L276 IsEmpty]: Start isEmpty. Operand 16136 states and 20230 transitions. [2020-08-21 22:11:14,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-21 22:11:14,015 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:14,016 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:14,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-21 22:11:14,016 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:14,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:14,016 INFO L82 PathProgramCache]: Analyzing trace with hash 791308478, now seen corresponding path program 1 times [2020-08-21 22:11:14,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:14,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821768707] [2020-08-21 22:11:14,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:14,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:14,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:14,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:14,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:14,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821768707] [2020-08-21 22:11:14,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:14,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:14,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512118247] [2020-08-21 22:11:14,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:14,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:14,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:14,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:14,035 INFO L87 Difference]: Start difference. First operand 16136 states and 20230 transitions. Second operand 3 states. [2020-08-21 22:11:14,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:14,292 INFO L93 Difference]: Finished difference Result 26636 states and 33544 transitions. [2020-08-21 22:11:14,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:14,293 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-21 22:11:14,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:14,450 INFO L225 Difference]: With dead ends: 26636 [2020-08-21 22:11:14,450 INFO L226 Difference]: Without dead ends: 26634 [2020-08-21 22:11:14,456 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 [2020-08-21 22:11:14,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26634 states. [2020-08-21 22:11:14,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26634 to 24584. [2020-08-21 22:11:14,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24584 states. [2020-08-21 22:11:14,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24584 states to 24584 states and 29958 transitions. [2020-08-21 22:11:14,879 INFO L78 Accepts]: Start accepts. Automaton has 24584 states and 29958 transitions. Word has length 30 [2020-08-21 22:11:14,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:14,879 INFO L479 AbstractCegarLoop]: Abstraction has 24584 states and 29958 transitions. [2020-08-21 22:11:14,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:14,879 INFO L276 IsEmpty]: Start isEmpty. Operand 24584 states and 29958 transitions. [2020-08-21 22:11:14,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-21 22:11:14,916 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:14,917 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:14,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-21 22:11:14,917 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:14,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:14,917 INFO L82 PathProgramCache]: Analyzing trace with hash -219808772, now seen corresponding path program 1 times [2020-08-21 22:11:14,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:14,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282805610] [2020-08-21 22:11:14,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:14,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:14,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:14,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:14,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:14,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [282805610] [2020-08-21 22:11:14,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:14,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:14,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123057598] [2020-08-21 22:11:14,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:14,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:14,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:14,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:14,938 INFO L87 Difference]: Start difference. First operand 24584 states and 29958 transitions. Second operand 3 states. [2020-08-21 22:11:15,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:15,448 INFO L93 Difference]: Finished difference Result 55308 states and 66824 transitions. [2020-08-21 22:11:15,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:15,449 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-21 22:11:15,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:15,526 INFO L225 Difference]: With dead ends: 55308 [2020-08-21 22:11:15,526 INFO L226 Difference]: Without dead ends: 31242 [2020-08-21 22:11:15,577 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 [2020-08-21 22:11:15,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31242 states. [2020-08-21 22:11:16,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31242 to 31240. [2020-08-21 22:11:16,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31240 states. [2020-08-21 22:11:16,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31240 states to 31240 states and 36870 transitions. [2020-08-21 22:11:16,134 INFO L78 Accepts]: Start accepts. Automaton has 31240 states and 36870 transitions. Word has length 30 [2020-08-21 22:11:16,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:16,135 INFO L479 AbstractCegarLoop]: Abstraction has 31240 states and 36870 transitions. [2020-08-21 22:11:16,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:16,135 INFO L276 IsEmpty]: Start isEmpty. Operand 31240 states and 36870 transitions. [2020-08-21 22:11:16,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 22:11:16,170 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:16,170 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:16,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-21 22:11:16,170 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:16,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:16,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1239024833, now seen corresponding path program 1 times [2020-08-21 22:11:16,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:16,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [626536648] [2020-08-21 22:11:16,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:16,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:16,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:16,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:16,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:16,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [626536648] [2020-08-21 22:11:16,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:16,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:16,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624283371] [2020-08-21 22:11:16,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:16,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:16,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:16,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:16,199 INFO L87 Difference]: Start difference. First operand 31240 states and 36870 transitions. Second operand 3 states. [2020-08-21 22:11:16,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:16,712 INFO L93 Difference]: Finished difference Result 46860 states and 55048 transitions. [2020-08-21 22:11:16,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:16,713 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-21 22:11:16,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:16,764 INFO L225 Difference]: With dead ends: 46860 [2020-08-21 22:11:16,764 INFO L226 Difference]: Without dead ends: 31754 [2020-08-21 22:11:16,789 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 [2020-08-21 22:11:16,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31754 states. [2020-08-21 22:11:17,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31754 to 31752. [2020-08-21 22:11:17,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31752 states. [2020-08-21 22:11:17,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31752 states to 31752 states and 36870 transitions. [2020-08-21 22:11:17,312 INFO L78 Accepts]: Start accepts. Automaton has 31752 states and 36870 transitions. Word has length 31 [2020-08-21 22:11:17,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:17,312 INFO L479 AbstractCegarLoop]: Abstraction has 31752 states and 36870 transitions. [2020-08-21 22:11:17,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:17,313 INFO L276 IsEmpty]: Start isEmpty. Operand 31752 states and 36870 transitions. [2020-08-21 22:11:17,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 22:11:17,336 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:17,336 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:17,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-21 22:11:17,336 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:17,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:17,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1776078785, now seen corresponding path program 1 times [2020-08-21 22:11:17,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:17,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [191518032] [2020-08-21 22:11:17,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:17,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:17,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:17,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:17,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:17,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [191518032] [2020-08-21 22:11:17,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:17,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:17,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204105873] [2020-08-21 22:11:17,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:17,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:17,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:17,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:17,365 INFO L87 Difference]: Start difference. First operand 31752 states and 36870 transitions. Second operand 3 states. [2020-08-21 22:11:18,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:18,119 INFO L93 Difference]: Finished difference Result 51210 states and 58887 transitions. [2020-08-21 22:11:18,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:18,120 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-21 22:11:18,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:18,183 INFO L225 Difference]: With dead ends: 51210 [2020-08-21 22:11:18,184 INFO L226 Difference]: Without dead ends: 51208 [2020-08-21 22:11:18,194 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 [2020-08-21 22:11:18,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51208 states. [2020-08-21 22:11:18,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51208 to 49160. [2020-08-21 22:11:18,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49160 states. [2020-08-21 22:11:19,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49160 states to 49160 states and 55814 transitions. [2020-08-21 22:11:19,062 INFO L78 Accepts]: Start accepts. Automaton has 49160 states and 55814 transitions. Word has length 31 [2020-08-21 22:11:19,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:19,062 INFO L479 AbstractCegarLoop]: Abstraction has 49160 states and 55814 transitions. [2020-08-21 22:11:19,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:19,063 INFO L276 IsEmpty]: Start isEmpty. Operand 49160 states and 55814 transitions. [2020-08-21 22:11:19,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 22:11:19,118 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:19,119 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:19,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-21 22:11:19,119 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:19,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:19,120 INFO L82 PathProgramCache]: Analyzing trace with hash 764961535, now seen corresponding path program 1 times [2020-08-21 22:11:19,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:19,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [257070205] [2020-08-21 22:11:19,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:19,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:19,326 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2020-08-21 22:11:19,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:19,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:19,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:19,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [257070205] [2020-08-21 22:11:19,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:19,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:11:19,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798457518] [2020-08-21 22:11:19,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:11:19,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:19,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:11:19,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:19,332 INFO L87 Difference]: Start difference. First operand 49160 states and 55814 transitions. Second operand 3 states. [2020-08-21 22:11:20,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:20,091 INFO L93 Difference]: Finished difference Result 109576 states and 122374 transitions. [2020-08-21 22:11:20,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:11:20,092 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-21 22:11:20,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:20,093 INFO L225 Difference]: With dead ends: 109576 [2020-08-21 22:11:20,093 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 22:11:20,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:11:20,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 22:11:20,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 22:11:20,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 22:11:20,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 22:11:20,228 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2020-08-21 22:11:20,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:20,228 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 22:11:20,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:11:20,229 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 22:11:20,229 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 22:11:20,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-21 22:11:20,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 22:11:20,273 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 22:11:20,273 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 22:11:20,273 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 22:11:20,273 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 22:11:20,274 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 22:11:20,274 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 22:11:20,274 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 177) no Hoare annotation was computed. [2020-08-21 22:11:20,275 INFO L268 CegarLoopResult]: For program point L118(line 118) no Hoare annotation was computed. [2020-08-21 22:11:20,275 INFO L268 CegarLoopResult]: For program point L143(line 143) no Hoare annotation was computed. [2020-08-21 22:11:20,275 INFO L268 CegarLoopResult]: For program point L44(lines 44 46) no Hoare annotation was computed. [2020-08-21 22:11:20,275 INFO L268 CegarLoopResult]: For program point L168(line 168) no Hoare annotation was computed. [2020-08-21 22:11:20,275 INFO L264 CegarLoopResult]: At program point L168-1(lines 5 177) the Hoare annotation is: false [2020-08-21 22:11:20,276 INFO L268 CegarLoopResult]: For program point L127-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 22:11:20,276 INFO L268 CegarLoopResult]: For program point L152-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 22:11:20,276 INFO L268 CegarLoopResult]: For program point L111-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 22:11:20,277 INFO L268 CegarLoopResult]: For program point L103-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 22:11:20,277 INFO L268 CegarLoopResult]: For program point L128(line 128) no Hoare annotation was computed. [2020-08-21 22:11:20,277 INFO L268 CegarLoopResult]: For program point L95-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 22:11:20,277 INFO L268 CegarLoopResult]: For program point L153(line 153) no Hoare annotation was computed. [2020-08-21 22:11:20,277 INFO L268 CegarLoopResult]: For program point L87-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 22:11:20,277 INFO L268 CegarLoopResult]: For program point L79-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 22:11:20,277 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 177) no Hoare annotation was computed. [2020-08-21 22:11:20,277 INFO L268 CegarLoopResult]: For program point L137-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 22:11:20,277 INFO L268 CegarLoopResult]: For program point L71(lines 71 73) no Hoare annotation was computed. [2020-08-21 22:11:20,278 INFO L268 CegarLoopResult]: For program point L71-2(lines 42 172) no Hoare annotation was computed. [2020-08-21 22:11:20,278 INFO L268 CegarLoopResult]: For program point L162-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 22:11:20,278 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 175) no Hoare annotation was computed. [2020-08-21 22:11:20,278 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 177) the Hoare annotation is: true [2020-08-21 22:11:20,278 INFO L268 CegarLoopResult]: For program point L138(line 138) no Hoare annotation was computed. [2020-08-21 22:11:20,278 INFO L268 CegarLoopResult]: For program point L163(line 163) no Hoare annotation was computed. [2020-08-21 22:11:20,278 INFO L268 CegarLoopResult]: For program point L122-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 22:11:20,278 INFO L268 CegarLoopResult]: For program point L147-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 22:11:20,279 INFO L268 CegarLoopResult]: For program point L123(line 123) no Hoare annotation was computed. [2020-08-21 22:11:20,279 INFO L268 CegarLoopResult]: For program point L148(line 148) no Hoare annotation was computed. [2020-08-21 22:11:20,279 INFO L271 CegarLoopResult]: At program point L173(lines 5 177) the Hoare annotation is: true [2020-08-21 22:11:20,279 INFO L268 CegarLoopResult]: For program point L107-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 22:11:20,279 INFO L268 CegarLoopResult]: For program point L132-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 22:11:20,279 INFO L268 CegarLoopResult]: For program point L99-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 22:11:20,279 INFO L268 CegarLoopResult]: For program point L157-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 22:11:20,280 INFO L268 CegarLoopResult]: For program point L91-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 22:11:20,280 INFO L268 CegarLoopResult]: For program point L83-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 22:11:20,280 INFO L268 CegarLoopResult]: For program point L75-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 22:11:20,280 INFO L268 CegarLoopResult]: For program point L133(line 133) no Hoare annotation was computed. [2020-08-21 22:11:20,280 INFO L268 CegarLoopResult]: For program point L158(line 158) no Hoare annotation was computed. [2020-08-21 22:11:20,280 INFO L268 CegarLoopResult]: For program point L117-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 22:11:20,281 INFO L268 CegarLoopResult]: For program point L142-1(lines 42 172) no Hoare annotation was computed. [2020-08-21 22:11:20,281 INFO L271 CegarLoopResult]: At program point L167-1(lines 42 172) the Hoare annotation is: true [2020-08-21 22:11:20,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 10:11:20 BoogieIcfgContainer [2020-08-21 22:11:20,302 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 22:11:20,304 INFO L168 Benchmark]: Toolchain (without parser) took 13995.52 ms. Allocated memory was 140.0 MB in the beginning and 919.6 MB in the end (delta: 779.6 MB). Free memory was 102.7 MB in the beginning and 356.3 MB in the end (delta: -253.6 MB). Peak memory consumption was 526.0 MB. Max. memory is 7.1 GB. [2020-08-21 22:11:20,311 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 22:11:20,311 INFO L168 Benchmark]: CACSL2BoogieTranslator took 301.55 ms. Allocated memory is still 140.0 MB. Free memory was 102.5 MB in the beginning and 91.6 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-08-21 22:11:20,313 INFO L168 Benchmark]: Boogie Preprocessor took 106.38 ms. Allocated memory was 140.0 MB in the beginning and 201.3 MB in the end (delta: 61.3 MB). Free memory was 91.6 MB in the beginning and 178.7 MB in the end (delta: -87.1 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-08-21 22:11:20,314 INFO L168 Benchmark]: RCFGBuilder took 422.04 ms. Allocated memory is still 201.3 MB. Free memory was 178.7 MB in the beginning and 158.2 MB in the end (delta: 20.5 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. [2020-08-21 22:11:20,315 INFO L168 Benchmark]: TraceAbstraction took 13154.04 ms. Allocated memory was 201.3 MB in the beginning and 919.6 MB in the end (delta: 718.3 MB). Free memory was 157.6 MB in the beginning and 356.3 MB in the end (delta: -198.7 MB). Peak memory consumption was 519.5 MB. Max. memory is 7.1 GB. [2020-08-21 22:11:20,318 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 301.55 ms. Allocated memory is still 140.0 MB. Free memory was 102.5 MB in the beginning and 91.6 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 106.38 ms. Allocated memory was 140.0 MB in the beginning and 201.3 MB in the end (delta: 61.3 MB). Free memory was 91.6 MB in the beginning and 178.7 MB in the end (delta: -87.1 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 422.04 ms. Allocated memory is still 201.3 MB. Free memory was 178.7 MB in the beginning and 158.2 MB in the end (delta: 20.5 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 13154.04 ms. Allocated memory was 201.3 MB in the beginning and 919.6 MB in the end (delta: 718.3 MB). Free memory was 157.6 MB in the beginning and 356.3 MB in the end (delta: -198.7 MB). Peak memory consumption was 519.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 175]: 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: 42]: 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, 47 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 12.9s, OverallIterations: 31, TraceHistogramMax: 1, AutomataDifference: 6.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2877 SDtfs, 1405 SDslu, 1967 SDs, 0 SdLazy, 165 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 155 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49160occurred in iteration=30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 4.7s AutomataMinimizationTime, 31 MinimizatonAttempts, 8224 StatesRemovedByMinimization, 30 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 2058 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 808 NumberOfCodeBlocks, 808 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 777 ConstructedInterpolants, 0 QuantifiedInterpolants, 39912 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 31 InterpolantComputations, 31 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...