/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=HIGHLEXORDER -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 19:30:12,511 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-18 19:30:12,581 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 19:30:12,584 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 19:30:12,587 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 19:30:12,590 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 19:30:12,590 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 19:30:12,592 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 19:30:12,594 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 19:30:12,600 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 19:30:12,603 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 19:30:12,605 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 19:30:12,606 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 19:30:12,607 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 19:30:12,619 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 19:30:12,633 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 19:30:12,634 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 19:30:12,635 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 19:30:12,637 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 19:30:12,670 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 19:30:12,670 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 19:30:12,672 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 19:30:12,672 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 19:30:12,672 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 19:30:12,672 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 19:30:12,672 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 19:30:12,673 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 19:30:12,673 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 19:30:12,673 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 19:30:12,673 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 19:30:12,673 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 19:30:12,674 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 19:30:12,674 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 19:30:12,674 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 19:30:12,674 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 19:30:12,674 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 19:30:12,675 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 19:30:12,675 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 19:30:12,675 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 19:30:12,675 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 19:30:12,675 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 19:30:12,676 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 19:30:12,676 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 19:30:12,676 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 19:30:12,676 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 19:30:12,676 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 19:30:12,676 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 19:30:12,677 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 19:30:12,677 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=HIGHLEXORDER; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=HIGHLEXORDER; [2020-08-18 19:30:12,966 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 19:30:12,977 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 19:30:12,980 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 19:30:12,982 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 19:30:12,982 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 19:30:12,983 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_10.c [2020-08-18 19:30:13,044 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cca94c0fe/39514a432944424ca90e02540aa10df2/FLAGe51e1f5d0 [2020-08-18 19:30:13,497 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 19:30:13,498 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_10.c [2020-08-18 19:30:13,507 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cca94c0fe/39514a432944424ca90e02540aa10df2/FLAGe51e1f5d0 [2020-08-18 19:30:13,932 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cca94c0fe/39514a432944424ca90e02540aa10df2 [2020-08-18 19:30:13,943 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 19:30:13,945 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 19:30:13,946 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 19:30:13,946 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 19:30:13,950 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 19:30:13,951 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 07:30:13" (1/1) ... [2020-08-18 19:30:13,954 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 18.08 07:30:13, skipping insertion in model container [2020-08-18 19:30:13,954 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 07:30:13" (1/1) ... [2020-08-18 19:30:13,963 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 19:30:13,984 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 19:30:14,184 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 19:30:14,189 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 19:30:14,216 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 19:30:14,236 INFO L208 MainTranslator]: Completed translation [2020-08-18 19:30:14,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:30:14 WrapperNode [2020-08-18 19:30:14,237 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 19:30:14,238 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 19:30:14,238 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 19:30:14,238 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 19:30:14,335 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:30:14" (1/1) ... [2020-08-18 19:30:14,337 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:30:14" (1/1) ... [2020-08-18 19:30:14,345 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:30:14" (1/1) ... [2020-08-18 19:30:14,345 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:30:14" (1/1) ... [2020-08-18 19:30:14,353 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:30:14" (1/1) ... [2020-08-18 19:30:14,367 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:30:14" (1/1) ... [2020-08-18 19:30:14,370 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:30:14" (1/1) ... [2020-08-18 19:30:14,379 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 19:30:14,380 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 19:30:14,380 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 19:30:14,380 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 19:30:14,382 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:30:14" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 19:30:14,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 19:30:14,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 19:30:14,435 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 19:30:14,436 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 19:30:14,436 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 19:30:14,436 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 19:30:14,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 19:30:14,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 19:30:14,782 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 19:30:14,782 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 19:30:14,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 07:30:14 BoogieIcfgContainer [2020-08-18 19:30:14,787 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 19:30:14,798 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 19:30:14,798 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 19:30:14,802 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 19:30:14,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 07:30:13" (1/3) ... [2020-08-18 19:30:14,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b9d7810 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 07:30:14, skipping insertion in model container [2020-08-18 19:30:14,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:30:14" (2/3) ... [2020-08-18 19:30:14,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b9d7810 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 07:30:14, skipping insertion in model container [2020-08-18 19:30:14,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 07:30:14" (3/3) ... [2020-08-18 19:30:14,807 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_10.c [2020-08-18 19:30:14,816 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 19:30:14,824 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 19:30:14,837 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 19:30:14,863 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 19:30:14,863 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 19:30:14,863 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 19:30:14,863 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 19:30:14,864 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 19:30:14,864 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 19:30:14,864 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 19:30:14,864 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 19:30:14,884 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-08-18 19:30:14,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 19:30:14,890 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:14,891 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:30:14,892 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:14,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:14,897 INFO L82 PathProgramCache]: Analyzing trace with hash -917347053, now seen corresponding path program 1 times [2020-08-18 19:30:14,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:14,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1931282412] [2020-08-18 19:30:14,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:15,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:15,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:15,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:15,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:15,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1931282412] [2020-08-18 19:30:15,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:15,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:15,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012690024] [2020-08-18 19:30:15,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:15,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:15,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:15,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:15,136 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 3 states. [2020-08-18 19:30:15,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:15,231 INFO L93 Difference]: Finished difference Result 87 states and 150 transitions. [2020-08-18 19:30:15,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:15,234 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 19:30:15,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:15,255 INFO L225 Difference]: With dead ends: 87 [2020-08-18 19:30:15,255 INFO L226 Difference]: Without dead ends: 72 [2020-08-18 19:30:15,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:15,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-18 19:30:15,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-08-18 19:30:15,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-18 19:30:15,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 89 transitions. [2020-08-18 19:30:15,311 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 89 transitions. Word has length 20 [2020-08-18 19:30:15,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:15,312 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 89 transitions. [2020-08-18 19:30:15,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:15,313 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 89 transitions. [2020-08-18 19:30:15,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 19:30:15,314 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:15,314 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:30:15,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 19:30:15,315 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:15,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:15,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1504153067, now seen corresponding path program 1 times [2020-08-18 19:30:15,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:15,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553535997] [2020-08-18 19:30:15,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:15,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:15,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:15,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:15,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:15,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [553535997] [2020-08-18 19:30:15,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:15,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:15,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248959651] [2020-08-18 19:30:15,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:15,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:15,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:15,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:15,385 INFO L87 Difference]: Start difference. First operand 50 states and 89 transitions. Second operand 3 states. [2020-08-18 19:30:15,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:15,415 INFO L93 Difference]: Finished difference Result 117 states and 212 transitions. [2020-08-18 19:30:15,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:15,416 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 19:30:15,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:15,418 INFO L225 Difference]: With dead ends: 117 [2020-08-18 19:30:15,418 INFO L226 Difference]: Without dead ends: 72 [2020-08-18 19:30:15,420 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:15,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-18 19:30:15,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-08-18 19:30:15,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-18 19:30:15,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 125 transitions. [2020-08-18 19:30:15,432 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 125 transitions. Word has length 20 [2020-08-18 19:30:15,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:15,433 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 125 transitions. [2020-08-18 19:30:15,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:15,433 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 125 transitions. [2020-08-18 19:30:15,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 19:30:15,434 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:15,435 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:30:15,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 19:30:15,435 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:15,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:15,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1627225809, now seen corresponding path program 1 times [2020-08-18 19:30:15,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:15,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1832355863] [2020-08-18 19:30:15,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:15,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:15,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:15,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:15,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:15,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1832355863] [2020-08-18 19:30:15,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:15,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:15,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717103087] [2020-08-18 19:30:15,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:15,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:15,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:15,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:15,519 INFO L87 Difference]: Start difference. First operand 70 states and 125 transitions. Second operand 3 states. [2020-08-18 19:30:15,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:15,544 INFO L93 Difference]: Finished difference Result 108 states and 189 transitions. [2020-08-18 19:30:15,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:15,545 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 19:30:15,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:15,547 INFO L225 Difference]: With dead ends: 108 [2020-08-18 19:30:15,547 INFO L226 Difference]: Without dead ends: 75 [2020-08-18 19:30:15,548 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:15,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-18 19:30:15,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2020-08-18 19:30:15,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-18 19:30:15,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 127 transitions. [2020-08-18 19:30:15,559 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 127 transitions. Word has length 21 [2020-08-18 19:30:15,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:15,559 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 127 transitions. [2020-08-18 19:30:15,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:15,560 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 127 transitions. [2020-08-18 19:30:15,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 19:30:15,561 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:15,561 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:30:15,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 19:30:15,561 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:15,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:15,562 INFO L82 PathProgramCache]: Analyzing trace with hash 616108559, now seen corresponding path program 1 times [2020-08-18 19:30:15,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:15,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052990327] [2020-08-18 19:30:15,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:15,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:15,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:15,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:15,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:15,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052990327] [2020-08-18 19:30:15,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:15,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:15,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128987400] [2020-08-18 19:30:15,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:15,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:15,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:15,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:15,610 INFO L87 Difference]: Start difference. First operand 73 states and 127 transitions. Second operand 3 states. [2020-08-18 19:30:15,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:15,656 INFO L93 Difference]: Finished difference Result 136 states and 240 transitions. [2020-08-18 19:30:15,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:15,656 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 19:30:15,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:15,658 INFO L225 Difference]: With dead ends: 136 [2020-08-18 19:30:15,659 INFO L226 Difference]: Without dead ends: 134 [2020-08-18 19:30:15,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:15,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-08-18 19:30:15,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 96. [2020-08-18 19:30:15,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-18 19:30:15,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 168 transitions. [2020-08-18 19:30:15,673 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 168 transitions. Word has length 21 [2020-08-18 19:30:15,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:15,673 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 168 transitions. [2020-08-18 19:30:15,673 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:15,674 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 168 transitions. [2020-08-18 19:30:15,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 19:30:15,675 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:15,675 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:30:15,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 19:30:15,676 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:15,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:15,676 INFO L82 PathProgramCache]: Analyzing trace with hash 29302545, now seen corresponding path program 1 times [2020-08-18 19:30:15,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:15,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1989372991] [2020-08-18 19:30:15,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:15,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:15,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:15,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:15,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:15,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1989372991] [2020-08-18 19:30:15,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:15,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:15,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778156921] [2020-08-18 19:30:15,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:15,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:15,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:15,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:15,721 INFO L87 Difference]: Start difference. First operand 96 states and 168 transitions. Second operand 3 states. [2020-08-18 19:30:15,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:15,745 INFO L93 Difference]: Finished difference Result 224 states and 398 transitions. [2020-08-18 19:30:15,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:15,746 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 19:30:15,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:15,748 INFO L225 Difference]: With dead ends: 224 [2020-08-18 19:30:15,748 INFO L226 Difference]: Without dead ends: 136 [2020-08-18 19:30:15,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:15,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-08-18 19:30:15,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2020-08-18 19:30:15,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-08-18 19:30:15,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 234 transitions. [2020-08-18 19:30:15,767 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 234 transitions. Word has length 21 [2020-08-18 19:30:15,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:15,768 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 234 transitions. [2020-08-18 19:30:15,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:15,768 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 234 transitions. [2020-08-18 19:30:15,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 19:30:15,772 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:15,772 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] [2020-08-18 19:30:15,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 19:30:15,772 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:15,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:15,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1919709866, now seen corresponding path program 1 times [2020-08-18 19:30:15,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:15,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236865219] [2020-08-18 19:30:15,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:15,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:15,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:15,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:15,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:15,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236865219] [2020-08-18 19:30:15,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:15,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:15,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215860775] [2020-08-18 19:30:15,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:15,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:15,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:15,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:15,859 INFO L87 Difference]: Start difference. First operand 134 states and 234 transitions. Second operand 3 states. [2020-08-18 19:30:15,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:15,881 INFO L93 Difference]: Finished difference Result 201 states and 349 transitions. [2020-08-18 19:30:15,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:15,896 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 19:30:15,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:15,898 INFO L225 Difference]: With dead ends: 201 [2020-08-18 19:30:15,898 INFO L226 Difference]: Without dead ends: 138 [2020-08-18 19:30:15,899 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:15,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-18 19:30:15,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-08-18 19:30:15,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-08-18 19:30:15,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 234 transitions. [2020-08-18 19:30:15,910 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 234 transitions. Word has length 22 [2020-08-18 19:30:15,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:15,911 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 234 transitions. [2020-08-18 19:30:15,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:15,911 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 234 transitions. [2020-08-18 19:30:15,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 19:30:15,913 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:15,913 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:30:15,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 19:30:15,913 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:15,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:15,914 INFO L82 PathProgramCache]: Analyzing trace with hash 908592616, now seen corresponding path program 1 times [2020-08-18 19:30:15,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:15,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [41142924] [2020-08-18 19:30:15,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:15,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:15,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:15,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:15,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:15,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [41142924] [2020-08-18 19:30:15,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:15,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:15,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795993454] [2020-08-18 19:30:15,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:15,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:15,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:15,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:15,946 INFO L87 Difference]: Start difference. First operand 136 states and 234 transitions. Second operand 3 states. [2020-08-18 19:30:15,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:15,965 INFO L93 Difference]: Finished difference Result 252 states and 440 transitions. [2020-08-18 19:30:15,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:15,965 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 19:30:15,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:15,968 INFO L225 Difference]: With dead ends: 252 [2020-08-18 19:30:15,968 INFO L226 Difference]: Without dead ends: 250 [2020-08-18 19:30:15,969 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:15,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-18 19:30:15,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 184. [2020-08-18 19:30:15,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-08-18 19:30:15,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 314 transitions. [2020-08-18 19:30:15,986 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 314 transitions. Word has length 22 [2020-08-18 19:30:15,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:15,987 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 314 transitions. [2020-08-18 19:30:15,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:15,987 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 314 transitions. [2020-08-18 19:30:15,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 19:30:15,989 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:15,989 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:30:15,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 19:30:15,989 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:15,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:15,990 INFO L82 PathProgramCache]: Analyzing trace with hash 321786602, now seen corresponding path program 1 times [2020-08-18 19:30:15,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:15,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1651171673] [2020-08-18 19:30:15,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:15,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:16,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:16,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:16,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:16,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1651171673] [2020-08-18 19:30:16,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:16,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:16,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180621384] [2020-08-18 19:30:16,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:16,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:16,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:16,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:16,018 INFO L87 Difference]: Start difference. First operand 184 states and 314 transitions. Second operand 3 states. [2020-08-18 19:30:16,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:16,039 INFO L93 Difference]: Finished difference Result 432 states and 744 transitions. [2020-08-18 19:30:16,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:16,040 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 19:30:16,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:16,042 INFO L225 Difference]: With dead ends: 432 [2020-08-18 19:30:16,042 INFO L226 Difference]: Without dead ends: 258 [2020-08-18 19:30:16,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:16,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-08-18 19:30:16,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2020-08-18 19:30:16,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-08-18 19:30:16,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 434 transitions. [2020-08-18 19:30:16,060 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 434 transitions. Word has length 22 [2020-08-18 19:30:16,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:16,060 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 434 transitions. [2020-08-18 19:30:16,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:16,060 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 434 transitions. [2020-08-18 19:30:16,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 19:30:16,062 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:16,062 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:30:16,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 19:30:16,063 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:16,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:16,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1898185914, now seen corresponding path program 1 times [2020-08-18 19:30:16,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:16,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [725613149] [2020-08-18 19:30:16,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:16,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:16,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:16,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:16,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:16,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [725613149] [2020-08-18 19:30:16,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:16,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:16,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878750707] [2020-08-18 19:30:16,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:16,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:16,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:16,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:16,096 INFO L87 Difference]: Start difference. First operand 256 states and 434 transitions. Second operand 3 states. [2020-08-18 19:30:16,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:16,137 INFO L93 Difference]: Finished difference Result 384 states and 648 transitions. [2020-08-18 19:30:16,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:16,138 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 19:30:16,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:16,139 INFO L225 Difference]: With dead ends: 384 [2020-08-18 19:30:16,140 INFO L226 Difference]: Without dead ends: 262 [2020-08-18 19:30:16,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:16,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-08-18 19:30:16,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 260. [2020-08-18 19:30:16,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-08-18 19:30:16,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 434 transitions. [2020-08-18 19:30:16,173 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 434 transitions. Word has length 23 [2020-08-18 19:30:16,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:16,173 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 434 transitions. [2020-08-18 19:30:16,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:16,174 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 434 transitions. [2020-08-18 19:30:16,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 19:30:16,181 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:16,181 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:30:16,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 19:30:16,181 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:16,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:16,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1385664132, now seen corresponding path program 1 times [2020-08-18 19:30:16,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:16,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1620902896] [2020-08-18 19:30:16,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:16,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:16,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:16,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:16,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:16,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1620902896] [2020-08-18 19:30:16,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:16,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:16,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672069215] [2020-08-18 19:30:16,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:16,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:16,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:16,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:16,240 INFO L87 Difference]: Start difference. First operand 260 states and 434 transitions. Second operand 3 states. [2020-08-18 19:30:16,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:16,260 INFO L93 Difference]: Finished difference Result 476 states and 808 transitions. [2020-08-18 19:30:16,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:16,261 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 19:30:16,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:16,264 INFO L225 Difference]: With dead ends: 476 [2020-08-18 19:30:16,264 INFO L226 Difference]: Without dead ends: 474 [2020-08-18 19:30:16,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:16,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2020-08-18 19:30:16,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 360. [2020-08-18 19:30:16,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-08-18 19:30:16,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 590 transitions. [2020-08-18 19:30:16,279 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 590 transitions. Word has length 23 [2020-08-18 19:30:16,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:16,280 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 590 transitions. [2020-08-18 19:30:16,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:16,280 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 590 transitions. [2020-08-18 19:30:16,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 19:30:16,282 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:16,282 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:30:16,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 19:30:16,283 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:16,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:16,283 INFO L82 PathProgramCache]: Analyzing trace with hash 798858118, now seen corresponding path program 1 times [2020-08-18 19:30:16,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:16,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1061023433] [2020-08-18 19:30:16,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:16,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:16,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:16,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:16,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:16,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1061023433] [2020-08-18 19:30:16,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:16,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:16,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423431032] [2020-08-18 19:30:16,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:16,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:16,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:16,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:16,309 INFO L87 Difference]: Start difference. First operand 360 states and 590 transitions. Second operand 3 states. [2020-08-18 19:30:16,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:16,340 INFO L93 Difference]: Finished difference Result 844 states and 1392 transitions. [2020-08-18 19:30:16,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:16,341 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 19:30:16,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:16,344 INFO L225 Difference]: With dead ends: 844 [2020-08-18 19:30:16,344 INFO L226 Difference]: Without dead ends: 498 [2020-08-18 19:30:16,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:16,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2020-08-18 19:30:16,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 496. [2020-08-18 19:30:16,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 496 states. [2020-08-18 19:30:16,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 806 transitions. [2020-08-18 19:30:16,363 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 806 transitions. Word has length 23 [2020-08-18 19:30:16,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:16,363 INFO L479 AbstractCegarLoop]: Abstraction has 496 states and 806 transitions. [2020-08-18 19:30:16,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:16,364 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 806 transitions. [2020-08-18 19:30:16,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 19:30:16,365 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:16,365 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:30:16,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 19:30:16,366 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:16,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:16,366 INFO L82 PathProgramCache]: Analyzing trace with hash 6129535, now seen corresponding path program 1 times [2020-08-18 19:30:16,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:16,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1325283821] [2020-08-18 19:30:16,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:16,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:16,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:16,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:16,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:16,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1325283821] [2020-08-18 19:30:16,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:16,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:16,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838581183] [2020-08-18 19:30:16,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:16,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:16,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:16,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:16,391 INFO L87 Difference]: Start difference. First operand 496 states and 806 transitions. Second operand 3 states. [2020-08-18 19:30:16,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:16,413 INFO L93 Difference]: Finished difference Result 744 states and 1204 transitions. [2020-08-18 19:30:16,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:16,413 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 19:30:16,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:16,416 INFO L225 Difference]: With dead ends: 744 [2020-08-18 19:30:16,416 INFO L226 Difference]: Without dead ends: 506 [2020-08-18 19:30:16,418 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:16,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2020-08-18 19:30:16,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 504. [2020-08-18 19:30:16,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 504 states. [2020-08-18 19:30:16,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 806 transitions. [2020-08-18 19:30:16,437 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 806 transitions. Word has length 24 [2020-08-18 19:30:16,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:16,437 INFO L479 AbstractCegarLoop]: Abstraction has 504 states and 806 transitions. [2020-08-18 19:30:16,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:16,438 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 806 transitions. [2020-08-18 19:30:16,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 19:30:16,439 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:16,439 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] [2020-08-18 19:30:16,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 19:30:16,443 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:16,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:16,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1004987715, now seen corresponding path program 1 times [2020-08-18 19:30:16,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:16,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1750948181] [2020-08-18 19:30:16,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:16,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:16,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:16,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:16,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:16,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1750948181] [2020-08-18 19:30:16,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:16,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:16,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747141454] [2020-08-18 19:30:16,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:16,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:16,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:16,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:16,496 INFO L87 Difference]: Start difference. First operand 504 states and 806 transitions. Second operand 3 states. [2020-08-18 19:30:16,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:16,534 INFO L93 Difference]: Finished difference Result 908 states and 1480 transitions. [2020-08-18 19:30:16,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:16,537 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 19:30:16,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:16,542 INFO L225 Difference]: With dead ends: 908 [2020-08-18 19:30:16,543 INFO L226 Difference]: Without dead ends: 906 [2020-08-18 19:30:16,544 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:16,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2020-08-18 19:30:16,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 712. [2020-08-18 19:30:16,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2020-08-18 19:30:16,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1110 transitions. [2020-08-18 19:30:16,572 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1110 transitions. Word has length 24 [2020-08-18 19:30:16,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:16,573 INFO L479 AbstractCegarLoop]: Abstraction has 712 states and 1110 transitions. [2020-08-18 19:30:16,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:16,573 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1110 transitions. [2020-08-18 19:30:16,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 19:30:16,577 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:16,578 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] [2020-08-18 19:30:16,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 19:30:16,578 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:16,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:16,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1591793729, now seen corresponding path program 1 times [2020-08-18 19:30:16,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:16,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1169564752] [2020-08-18 19:30:16,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:16,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:16,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:16,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:16,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:16,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1169564752] [2020-08-18 19:30:16,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:16,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:16,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713324022] [2020-08-18 19:30:16,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:16,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:16,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:16,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:16,627 INFO L87 Difference]: Start difference. First operand 712 states and 1110 transitions. Second operand 3 states. [2020-08-18 19:30:16,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:16,666 INFO L93 Difference]: Finished difference Result 1660 states and 2600 transitions. [2020-08-18 19:30:16,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:16,667 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 19:30:16,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:16,673 INFO L225 Difference]: With dead ends: 1660 [2020-08-18 19:30:16,673 INFO L226 Difference]: Without dead ends: 970 [2020-08-18 19:30:16,676 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:16,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2020-08-18 19:30:16,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 968. [2020-08-18 19:30:16,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 968 states. [2020-08-18 19:30:16,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1494 transitions. [2020-08-18 19:30:16,711 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1494 transitions. Word has length 24 [2020-08-18 19:30:16,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:16,713 INFO L479 AbstractCegarLoop]: Abstraction has 968 states and 1494 transitions. [2020-08-18 19:30:16,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:16,714 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1494 transitions. [2020-08-18 19:30:16,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 19:30:16,717 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:16,717 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] [2020-08-18 19:30:16,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 19:30:16,717 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:16,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:16,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1089633349, now seen corresponding path program 1 times [2020-08-18 19:30:16,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:16,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773683990] [2020-08-18 19:30:16,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:16,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:16,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:16,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:16,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:16,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773683990] [2020-08-18 19:30:16,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:16,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:16,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515319766] [2020-08-18 19:30:16,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:16,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:16,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:16,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:16,773 INFO L87 Difference]: Start difference. First operand 968 states and 1494 transitions. Second operand 3 states. [2020-08-18 19:30:16,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:16,804 INFO L93 Difference]: Finished difference Result 1452 states and 2232 transitions. [2020-08-18 19:30:16,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:16,804 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 19:30:16,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:16,809 INFO L225 Difference]: With dead ends: 1452 [2020-08-18 19:30:16,810 INFO L226 Difference]: Without dead ends: 986 [2020-08-18 19:30:16,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:16,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2020-08-18 19:30:16,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 984. [2020-08-18 19:30:16,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 984 states. [2020-08-18 19:30:16,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 1494 transitions. [2020-08-18 19:30:16,840 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 1494 transitions. Word has length 25 [2020-08-18 19:30:16,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:16,840 INFO L479 AbstractCegarLoop]: Abstraction has 984 states and 1494 transitions. [2020-08-18 19:30:16,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:16,840 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 1494 transitions. [2020-08-18 19:30:16,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 19:30:16,842 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:16,842 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] [2020-08-18 19:30:16,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 19:30:16,843 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:16,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:16,843 INFO L82 PathProgramCache]: Analyzing trace with hash -2100750599, now seen corresponding path program 1 times [2020-08-18 19:30:16,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:16,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [846703170] [2020-08-18 19:30:16,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:16,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:16,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:16,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:16,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:16,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [846703170] [2020-08-18 19:30:16,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:16,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:16,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867761752] [2020-08-18 19:30:16,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:16,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:16,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:16,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:16,873 INFO L87 Difference]: Start difference. First operand 984 states and 1494 transitions. Second operand 3 states. [2020-08-18 19:30:16,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:16,913 INFO L93 Difference]: Finished difference Result 1740 states and 2696 transitions. [2020-08-18 19:30:16,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:16,914 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 19:30:16,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:16,926 INFO L225 Difference]: With dead ends: 1740 [2020-08-18 19:30:16,926 INFO L226 Difference]: Without dead ends: 1738 [2020-08-18 19:30:16,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:16,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2020-08-18 19:30:16,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1416. [2020-08-18 19:30:16,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1416 states. [2020-08-18 19:30:16,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 2086 transitions. [2020-08-18 19:30:16,982 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 2086 transitions. Word has length 25 [2020-08-18 19:30:16,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:16,983 INFO L479 AbstractCegarLoop]: Abstraction has 1416 states and 2086 transitions. [2020-08-18 19:30:16,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:16,983 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 2086 transitions. [2020-08-18 19:30:16,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 19:30:16,986 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:16,986 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] [2020-08-18 19:30:16,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 19:30:16,986 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:16,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:16,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1607410683, now seen corresponding path program 1 times [2020-08-18 19:30:16,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:16,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087890165] [2020-08-18 19:30:16,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:16,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:17,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:17,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:17,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:17,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2087890165] [2020-08-18 19:30:17,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:17,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:17,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832455499] [2020-08-18 19:30:17,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:17,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:17,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:17,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:17,028 INFO L87 Difference]: Start difference. First operand 1416 states and 2086 transitions. Second operand 3 states. [2020-08-18 19:30:17,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:17,097 INFO L93 Difference]: Finished difference Result 3276 states and 4840 transitions. [2020-08-18 19:30:17,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:17,098 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 19:30:17,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:17,110 INFO L225 Difference]: With dead ends: 3276 [2020-08-18 19:30:17,110 INFO L226 Difference]: Without dead ends: 1898 [2020-08-18 19:30:17,114 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 [2020-08-18 19:30:17,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2020-08-18 19:30:17,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1896. [2020-08-18 19:30:17,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1896 states. [2020-08-18 19:30:17,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 2758 transitions. [2020-08-18 19:30:17,209 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 2758 transitions. Word has length 25 [2020-08-18 19:30:17,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:17,210 INFO L479 AbstractCegarLoop]: Abstraction has 1896 states and 2758 transitions. [2020-08-18 19:30:17,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:17,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 2758 transitions. [2020-08-18 19:30:17,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 19:30:17,214 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:17,215 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] [2020-08-18 19:30:17,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 19:30:17,215 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:17,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:17,216 INFO L82 PathProgramCache]: Analyzing trace with hash -698544044, now seen corresponding path program 1 times [2020-08-18 19:30:17,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:17,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1936583521] [2020-08-18 19:30:17,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:17,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:17,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:17,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:17,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:17,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1936583521] [2020-08-18 19:30:17,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:17,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:17,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914685459] [2020-08-18 19:30:17,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:17,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:17,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:17,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:17,258 INFO L87 Difference]: Start difference. First operand 1896 states and 2758 transitions. Second operand 3 states. [2020-08-18 19:30:17,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:17,320 INFO L93 Difference]: Finished difference Result 2844 states and 4120 transitions. [2020-08-18 19:30:17,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:17,321 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-18 19:30:17,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:17,334 INFO L225 Difference]: With dead ends: 2844 [2020-08-18 19:30:17,334 INFO L226 Difference]: Without dead ends: 1930 [2020-08-18 19:30:17,337 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 [2020-08-18 19:30:17,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-18 19:30:17,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1928. [2020-08-18 19:30:17,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1928 states. [2020-08-18 19:30:17,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 2758 transitions. [2020-08-18 19:30:17,412 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 2758 transitions. Word has length 26 [2020-08-18 19:30:17,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:17,412 INFO L479 AbstractCegarLoop]: Abstraction has 1928 states and 2758 transitions. [2020-08-18 19:30:17,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:17,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 2758 transitions. [2020-08-18 19:30:17,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 19:30:17,440 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:17,440 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] [2020-08-18 19:30:17,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 19:30:17,441 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:17,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:17,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1709661294, now seen corresponding path program 1 times [2020-08-18 19:30:17,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:17,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843139713] [2020-08-18 19:30:17,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:17,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:17,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:17,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:17,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:17,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843139713] [2020-08-18 19:30:17,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:17,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:17,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210517005] [2020-08-18 19:30:17,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:17,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:17,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:17,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:17,472 INFO L87 Difference]: Start difference. First operand 1928 states and 2758 transitions. Second operand 3 states. [2020-08-18 19:30:17,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:17,535 INFO L93 Difference]: Finished difference Result 3340 states and 4872 transitions. [2020-08-18 19:30:17,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:17,536 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-18 19:30:17,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:17,551 INFO L225 Difference]: With dead ends: 3340 [2020-08-18 19:30:17,552 INFO L226 Difference]: Without dead ends: 3338 [2020-08-18 19:30:17,553 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:17,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2020-08-18 19:30:17,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 2824. [2020-08-18 19:30:17,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2824 states. [2020-08-18 19:30:17,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2824 states to 2824 states and 3910 transitions. [2020-08-18 19:30:17,645 INFO L78 Accepts]: Start accepts. Automaton has 2824 states and 3910 transitions. Word has length 26 [2020-08-18 19:30:17,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:17,645 INFO L479 AbstractCegarLoop]: Abstraction has 2824 states and 3910 transitions. [2020-08-18 19:30:17,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:17,645 INFO L276 IsEmpty]: Start isEmpty. Operand 2824 states and 3910 transitions. [2020-08-18 19:30:17,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 19:30:17,650 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:17,650 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] [2020-08-18 19:30:17,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 19:30:17,651 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:17,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:17,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1998499988, now seen corresponding path program 1 times [2020-08-18 19:30:17,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:17,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1072366705] [2020-08-18 19:30:17,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:17,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:17,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:17,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:17,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:17,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1072366705] [2020-08-18 19:30:17,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:17,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:17,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803970202] [2020-08-18 19:30:17,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:17,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:17,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:17,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:17,676 INFO L87 Difference]: Start difference. First operand 2824 states and 3910 transitions. Second operand 3 states. [2020-08-18 19:30:17,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:17,752 INFO L93 Difference]: Finished difference Result 6476 states and 8968 transitions. [2020-08-18 19:30:17,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:17,752 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-18 19:30:17,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:17,770 INFO L225 Difference]: With dead ends: 6476 [2020-08-18 19:30:17,770 INFO L226 Difference]: Without dead ends: 3722 [2020-08-18 19:30:17,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:17,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2020-08-18 19:30:17,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3720. [2020-08-18 19:30:17,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3720 states. [2020-08-18 19:30:17,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3720 states to 3720 states and 5062 transitions. [2020-08-18 19:30:17,887 INFO L78 Accepts]: Start accepts. Automaton has 3720 states and 5062 transitions. Word has length 26 [2020-08-18 19:30:17,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:17,888 INFO L479 AbstractCegarLoop]: Abstraction has 3720 states and 5062 transitions. [2020-08-18 19:30:17,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:17,888 INFO L276 IsEmpty]: Start isEmpty. Operand 3720 states and 5062 transitions. [2020-08-18 19:30:17,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 19:30:17,893 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:17,893 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] [2020-08-18 19:30:17,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 19:30:17,896 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:17,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:17,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1459677136, now seen corresponding path program 1 times [2020-08-18 19:30:17,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:17,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1460570465] [2020-08-18 19:30:17,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:17,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:17,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:17,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:17,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:17,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1460570465] [2020-08-18 19:30:17,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:17,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:17,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146052493] [2020-08-18 19:30:17,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:17,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:17,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:17,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:17,948 INFO L87 Difference]: Start difference. First operand 3720 states and 5062 transitions. Second operand 3 states. [2020-08-18 19:30:18,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:18,011 INFO L93 Difference]: Finished difference Result 5580 states and 7560 transitions. [2020-08-18 19:30:18,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:18,011 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-18 19:30:18,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:18,029 INFO L225 Difference]: With dead ends: 5580 [2020-08-18 19:30:18,029 INFO L226 Difference]: Without dead ends: 3786 [2020-08-18 19:30:18,033 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:18,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3786 states. [2020-08-18 19:30:18,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3786 to 3784. [2020-08-18 19:30:18,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3784 states. [2020-08-18 19:30:18,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3784 states to 3784 states and 5062 transitions. [2020-08-18 19:30:18,140 INFO L78 Accepts]: Start accepts. Automaton has 3784 states and 5062 transitions. Word has length 27 [2020-08-18 19:30:18,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:18,141 INFO L479 AbstractCegarLoop]: Abstraction has 3784 states and 5062 transitions. [2020-08-18 19:30:18,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:18,141 INFO L276 IsEmpty]: Start isEmpty. Operand 3784 states and 5062 transitions. [2020-08-18 19:30:18,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 19:30:18,146 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:18,146 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] [2020-08-18 19:30:18,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-18 19:30:18,147 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:18,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:18,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1824172910, now seen corresponding path program 1 times [2020-08-18 19:30:18,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:18,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446053085] [2020-08-18 19:30:18,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:18,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:18,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:18,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:18,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:18,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [446053085] [2020-08-18 19:30:18,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:18,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:18,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622066519] [2020-08-18 19:30:18,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:18,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:18,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:18,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:18,176 INFO L87 Difference]: Start difference. First operand 3784 states and 5062 transitions. Second operand 3 states. [2020-08-18 19:30:18,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:18,278 INFO L93 Difference]: Finished difference Result 10956 states and 14408 transitions. [2020-08-18 19:30:18,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:18,278 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-18 19:30:18,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:18,319 INFO L225 Difference]: With dead ends: 10956 [2020-08-18 19:30:18,320 INFO L226 Difference]: Without dead ends: 7306 [2020-08-18 19:30:18,329 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:18,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7306 states. [2020-08-18 19:30:18,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7306 to 7304. [2020-08-18 19:30:18,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7304 states. [2020-08-18 19:30:18,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 9350 transitions. [2020-08-18 19:30:18,589 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 9350 transitions. Word has length 27 [2020-08-18 19:30:18,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:18,589 INFO L479 AbstractCegarLoop]: Abstraction has 7304 states and 9350 transitions. [2020-08-18 19:30:18,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:18,589 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 9350 transitions. [2020-08-18 19:30:18,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 19:30:18,598 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:18,598 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] [2020-08-18 19:30:18,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-18 19:30:18,599 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:18,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:18,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1883988372, now seen corresponding path program 1 times [2020-08-18 19:30:18,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:18,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888599260] [2020-08-18 19:30:18,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:18,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:18,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:18,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:18,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:18,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1888599260] [2020-08-18 19:30:18,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:18,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:18,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945435181] [2020-08-18 19:30:18,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:18,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:18,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:18,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:18,633 INFO L87 Difference]: Start difference. First operand 7304 states and 9350 transitions. Second operand 3 states. [2020-08-18 19:30:18,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:18,738 INFO L93 Difference]: Finished difference Result 8076 states and 10632 transitions. [2020-08-18 19:30:18,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:18,738 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-18 19:30:18,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:18,755 INFO L225 Difference]: With dead ends: 8076 [2020-08-18 19:30:18,755 INFO L226 Difference]: Without dead ends: 8074 [2020-08-18 19:30:18,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:18,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2020-08-18 19:30:18,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 7304. [2020-08-18 19:30:18,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7304 states. [2020-08-18 19:30:18,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 9222 transitions. [2020-08-18 19:30:18,928 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 9222 transitions. Word has length 27 [2020-08-18 19:30:18,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:18,928 INFO L479 AbstractCegarLoop]: Abstraction has 7304 states and 9222 transitions. [2020-08-18 19:30:18,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:18,929 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 9222 transitions. [2020-08-18 19:30:18,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 19:30:18,937 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:18,938 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] [2020-08-18 19:30:18,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-18 19:30:18,938 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:18,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:18,939 INFO L82 PathProgramCache]: Analyzing trace with hash 715001129, now seen corresponding path program 1 times [2020-08-18 19:30:18,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:18,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1567223040] [2020-08-18 19:30:18,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:18,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:18,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:18,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:18,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:18,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1567223040] [2020-08-18 19:30:18,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:18,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:18,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178926111] [2020-08-18 19:30:18,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:18,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:18,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:18,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:18,992 INFO L87 Difference]: Start difference. First operand 7304 states and 9222 transitions. Second operand 3 states. [2020-08-18 19:30:19,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:19,192 INFO L93 Difference]: Finished difference Result 12172 states and 15496 transitions. [2020-08-18 19:30:19,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:19,192 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-18 19:30:19,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:19,214 INFO L225 Difference]: With dead ends: 12172 [2020-08-18 19:30:19,214 INFO L226 Difference]: Without dead ends: 12170 [2020-08-18 19:30:19,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:19,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12170 states. [2020-08-18 19:30:19,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12170 to 11144. [2020-08-18 19:30:19,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11144 states. [2020-08-18 19:30:19,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11144 states to 11144 states and 13702 transitions. [2020-08-18 19:30:19,437 INFO L78 Accepts]: Start accepts. Automaton has 11144 states and 13702 transitions. Word has length 28 [2020-08-18 19:30:19,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:19,438 INFO L479 AbstractCegarLoop]: Abstraction has 11144 states and 13702 transitions. [2020-08-18 19:30:19,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:19,438 INFO L276 IsEmpty]: Start isEmpty. Operand 11144 states and 13702 transitions. [2020-08-18 19:30:19,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 19:30:19,455 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:19,455 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] [2020-08-18 19:30:19,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-18 19:30:19,456 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:19,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:19,456 INFO L82 PathProgramCache]: Analyzing trace with hash 128195115, now seen corresponding path program 1 times [2020-08-18 19:30:19,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:19,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [760104923] [2020-08-18 19:30:19,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:19,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:19,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:19,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:19,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:19,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [760104923] [2020-08-18 19:30:19,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:19,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:19,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872670305] [2020-08-18 19:30:19,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:19,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:19,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:19,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:19,485 INFO L87 Difference]: Start difference. First operand 11144 states and 13702 transitions. Second operand 3 states. [2020-08-18 19:30:19,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:19,763 INFO L93 Difference]: Finished difference Result 25228 states and 30856 transitions. [2020-08-18 19:30:19,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:19,764 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-18 19:30:19,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:19,788 INFO L225 Difference]: With dead ends: 25228 [2020-08-18 19:30:19,789 INFO L226 Difference]: Without dead ends: 14218 [2020-08-18 19:30:19,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:19,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14218 states. [2020-08-18 19:30:20,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14218 to 14216. [2020-08-18 19:30:20,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14216 states. [2020-08-18 19:30:20,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14216 states to 14216 states and 16902 transitions. [2020-08-18 19:30:20,111 INFO L78 Accepts]: Start accepts. Automaton has 14216 states and 16902 transitions. Word has length 28 [2020-08-18 19:30:20,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:20,111 INFO L479 AbstractCegarLoop]: Abstraction has 14216 states and 16902 transitions. [2020-08-18 19:30:20,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:20,112 INFO L276 IsEmpty]: Start isEmpty. Operand 14216 states and 16902 transitions. [2020-08-18 19:30:20,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-18 19:30:20,129 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:20,129 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] [2020-08-18 19:30:20,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-18 19:30:20,129 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:20,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:20,130 INFO L82 PathProgramCache]: Analyzing trace with hash 690414627, now seen corresponding path program 1 times [2020-08-18 19:30:20,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:20,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1862110844] [2020-08-18 19:30:20,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:20,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:20,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:20,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:20,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:20,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1862110844] [2020-08-18 19:30:20,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:20,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:20,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704217019] [2020-08-18 19:30:20,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:20,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:20,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:20,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:20,151 INFO L87 Difference]: Start difference. First operand 14216 states and 16902 transitions. Second operand 3 states. [2020-08-18 19:30:20,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:20,425 INFO L93 Difference]: Finished difference Result 21516 states and 25608 transitions. [2020-08-18 19:30:20,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:20,426 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-18 19:30:20,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:20,451 INFO L225 Difference]: With dead ends: 21516 [2020-08-18 19:30:20,452 INFO L226 Difference]: Without dead ends: 14602 [2020-08-18 19:30:20,466 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:20,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14602 states. [2020-08-18 19:30:20,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14602 to 14600. [2020-08-18 19:30:20,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14600 states. [2020-08-18 19:30:20,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14600 states to 14600 states and 17158 transitions. [2020-08-18 19:30:20,729 INFO L78 Accepts]: Start accepts. Automaton has 14600 states and 17158 transitions. Word has length 29 [2020-08-18 19:30:20,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:20,730 INFO L479 AbstractCegarLoop]: Abstraction has 14600 states and 17158 transitions. [2020-08-18 19:30:20,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:20,730 INFO L276 IsEmpty]: Start isEmpty. Operand 14600 states and 17158 transitions. [2020-08-18 19:30:20,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-18 19:30:20,747 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:20,747 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] [2020-08-18 19:30:20,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-18 19:30:20,747 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:20,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:20,748 INFO L82 PathProgramCache]: Analyzing trace with hash -320702623, now seen corresponding path program 1 times [2020-08-18 19:30:20,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:20,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15370773] [2020-08-18 19:30:20,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:20,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:20,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:20,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:20,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:20,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15370773] [2020-08-18 19:30:20,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:20,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:20,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833149118] [2020-08-18 19:30:20,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:20,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:20,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:20,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:20,771 INFO L87 Difference]: Start difference. First operand 14600 states and 17158 transitions. Second operand 3 states. [2020-08-18 19:30:21,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:21,404 INFO L93 Difference]: Finished difference Result 23562 states and 27399 transitions. [2020-08-18 19:30:21,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:21,405 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-18 19:30:21,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:21,442 INFO L225 Difference]: With dead ends: 23562 [2020-08-18 19:30:21,442 INFO L226 Difference]: Without dead ends: 23560 [2020-08-18 19:30:21,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:21,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23560 states. [2020-08-18 19:30:21,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23560 to 22536. [2020-08-18 19:30:21,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22536 states. [2020-08-18 19:30:21,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22536 states to 22536 states and 25862 transitions. [2020-08-18 19:30:21,769 INFO L78 Accepts]: Start accepts. Automaton has 22536 states and 25862 transitions. Word has length 29 [2020-08-18 19:30:21,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:21,769 INFO L479 AbstractCegarLoop]: Abstraction has 22536 states and 25862 transitions. [2020-08-18 19:30:21,769 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:21,769 INFO L276 IsEmpty]: Start isEmpty. Operand 22536 states and 25862 transitions. [2020-08-18 19:30:21,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-18 19:30:21,875 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:30:21,875 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] [2020-08-18 19:30:21,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-18 19:30:21,876 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:30:21,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:30:21,876 INFO L82 PathProgramCache]: Analyzing trace with hash -907508637, now seen corresponding path program 1 times [2020-08-18 19:30:21,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:30:21,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1104423904] [2020-08-18 19:30:21,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:30:21,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:21,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:30:21,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:30:21,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:30:21,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1104423904] [2020-08-18 19:30:21,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:30:21,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:30:21,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462039503] [2020-08-18 19:30:21,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:30:21,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:30:21,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:30:21,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:21,895 INFO L87 Difference]: Start difference. First operand 22536 states and 25862 transitions. Second operand 3 states. [2020-08-18 19:30:22,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:30:22,180 INFO L93 Difference]: Finished difference Result 50184 states and 56582 transitions. [2020-08-18 19:30:22,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:30:22,181 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-18 19:30:22,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:30:22,181 INFO L225 Difference]: With dead ends: 50184 [2020-08-18 19:30:22,181 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 19:30:22,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:30:22,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 19:30:22,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 19:30:22,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 19:30:22,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 19:30:22,242 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-08-18 19:30:22,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:30:22,242 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 19:30:22,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:30:22,242 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 19:30:22,242 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 19:30:22,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-18 19:30:22,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 19:30:22,269 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 19:30:22,269 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 19:30:22,269 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 19:30:22,269 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 19:30:22,269 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 19:30:22,269 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 19:30:22,270 INFO L271 CegarLoopResult]: At program point L159(lines 5 163) the Hoare annotation is: true [2020-08-18 19:30:22,270 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 163) no Hoare annotation was computed. [2020-08-18 19:30:22,270 INFO L268 CegarLoopResult]: For program point L118-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 19:30:22,270 INFO L268 CegarLoopResult]: For program point L143-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 19:30:22,270 INFO L268 CegarLoopResult]: For program point L102-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 19:30:22,270 INFO L268 CegarLoopResult]: For program point L94-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 19:30:22,270 INFO L268 CegarLoopResult]: For program point L119(line 119) no Hoare annotation was computed. [2020-08-18 19:30:22,270 INFO L268 CegarLoopResult]: For program point L86-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 19:30:22,271 INFO L268 CegarLoopResult]: For program point L144(line 144) no Hoare annotation was computed. [2020-08-18 19:30:22,271 INFO L268 CegarLoopResult]: For program point L78-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 19:30:22,271 INFO L268 CegarLoopResult]: For program point L70-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 19:30:22,271 INFO L268 CegarLoopResult]: For program point L128-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 19:30:22,271 INFO L271 CegarLoopResult]: At program point L153-1(lines 39 158) the Hoare annotation is: true [2020-08-18 19:30:22,271 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 163) no Hoare annotation was computed. [2020-08-18 19:30:22,271 INFO L268 CegarLoopResult]: For program point L129(line 129) no Hoare annotation was computed. [2020-08-18 19:30:22,272 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 161) no Hoare annotation was computed. [2020-08-18 19:30:22,272 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 163) the Hoare annotation is: true [2020-08-18 19:30:22,272 INFO L268 CegarLoopResult]: For program point L154(line 154) no Hoare annotation was computed. [2020-08-18 19:30:22,272 INFO L264 CegarLoopResult]: At program point L154-1(lines 5 163) the Hoare annotation is: false [2020-08-18 19:30:22,272 INFO L268 CegarLoopResult]: For program point L113-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 19:30:22,272 INFO L268 CegarLoopResult]: For program point L138-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 19:30:22,272 INFO L268 CegarLoopResult]: For program point L114(line 114) no Hoare annotation was computed. [2020-08-18 19:30:22,272 INFO L268 CegarLoopResult]: For program point L139(line 139) no Hoare annotation was computed. [2020-08-18 19:30:22,273 INFO L268 CegarLoopResult]: For program point L98-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 19:30:22,273 INFO L268 CegarLoopResult]: For program point L123-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 19:30:22,273 INFO L268 CegarLoopResult]: For program point L90-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 19:30:22,273 INFO L268 CegarLoopResult]: For program point L148-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 19:30:22,273 INFO L268 CegarLoopResult]: For program point L82-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 19:30:22,273 INFO L268 CegarLoopResult]: For program point L41(lines 41 43) no Hoare annotation was computed. [2020-08-18 19:30:22,273 INFO L268 CegarLoopResult]: For program point L74-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 19:30:22,273 INFO L268 CegarLoopResult]: For program point L66(lines 66 68) no Hoare annotation was computed. [2020-08-18 19:30:22,274 INFO L268 CegarLoopResult]: For program point L66-2(lines 39 158) no Hoare annotation was computed. [2020-08-18 19:30:22,274 INFO L268 CegarLoopResult]: For program point L124(line 124) no Hoare annotation was computed. [2020-08-18 19:30:22,274 INFO L268 CegarLoopResult]: For program point L149(line 149) no Hoare annotation was computed. [2020-08-18 19:30:22,274 INFO L268 CegarLoopResult]: For program point L108-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 19:30:22,274 INFO L268 CegarLoopResult]: For program point L133-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 19:30:22,274 INFO L268 CegarLoopResult]: For program point L109(line 109) no Hoare annotation was computed. [2020-08-18 19:30:22,274 INFO L268 CegarLoopResult]: For program point L134(line 134) no Hoare annotation was computed. [2020-08-18 19:30:22,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 07:30:22 BoogieIcfgContainer [2020-08-18 19:30:22,286 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 19:30:22,289 INFO L168 Benchmark]: Toolchain (without parser) took 8343.58 ms. Allocated memory was 141.0 MB in the beginning and 633.9 MB in the end (delta: 492.8 MB). Free memory was 104.3 MB in the beginning and 355.5 MB in the end (delta: -251.2 MB). Peak memory consumption was 241.6 MB. Max. memory is 7.1 GB. [2020-08-18 19:30:22,289 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 19:30:22,290 INFO L168 Benchmark]: CACSL2BoogieTranslator took 291.56 ms. Allocated memory is still 141.0 MB. Free memory was 104.1 MB in the beginning and 92.8 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. [2020-08-18 19:30:22,291 INFO L168 Benchmark]: Boogie Preprocessor took 141.52 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 92.8 MB in the beginning and 181.0 MB in the end (delta: -88.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-08-18 19:30:22,291 INFO L168 Benchmark]: RCFGBuilder took 407.79 ms. Allocated memory is still 203.9 MB. Free memory was 181.0 MB in the beginning and 162.0 MB in the end (delta: 19.1 MB). Peak memory consumption was 19.1 MB. Max. memory is 7.1 GB. [2020-08-18 19:30:22,292 INFO L168 Benchmark]: TraceAbstraction took 7488.52 ms. Allocated memory was 203.9 MB in the beginning and 633.9 MB in the end (delta: 429.9 MB). Free memory was 161.3 MB in the beginning and 355.5 MB in the end (delta: -194.2 MB). Peak memory consumption was 235.7 MB. Max. memory is 7.1 GB. [2020-08-18 19:30:22,294 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 291.56 ms. Allocated memory is still 141.0 MB. Free memory was 104.1 MB in the beginning and 92.8 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 141.52 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 92.8 MB in the beginning and 181.0 MB in the end (delta: -88.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 407.79 ms. Allocated memory is still 203.9 MB. Free memory was 181.0 MB in the beginning and 162.0 MB in the end (delta: 19.1 MB). Peak memory consumption was 19.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7488.52 ms. Allocated memory was 203.9 MB in the beginning and 633.9 MB in the end (delta: 429.9 MB). Free memory was 161.3 MB in the beginning and 355.5 MB in the end (delta: -194.2 MB). Peak memory consumption was 235.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 161]: 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: 39]: 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, 44 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7.3s, OverallIterations: 28, TraceHistogramMax: 1, AutomataDifference: 3.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2384 SDtfs, 1153 SDslu, 1624 SDs, 0 SdLazy, 149 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 140 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22536occurred in iteration=27, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.3s AutomataMinimizationTime, 28 MinimizatonAttempts, 4124 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 1034 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 687 NumberOfCodeBlocks, 687 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 659 ConstructedInterpolants, 0 QuantifiedInterpolants, 31265 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 28 InterpolantComputations, 28 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...