/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=WIDEST -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 22:43:40,758 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 22:43:40,763 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 22:43:40,808 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-18 22:43:40,888 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 22:43:40,889 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 22:43:40,890 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 22:43:40,891 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 22:43:40,913 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 22:43:40,914 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 22:43:40,915 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 22:43:40,915 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 22:43:40,916 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 22:43:40,916 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 22:43:40,916 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 22:43:40,916 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 22:43:40,916 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 22:43:40,917 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 22:43:40,917 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 22:43:40,917 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 22:43:40,917 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 22:43:40,918 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 22:43:40,918 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 22:43:40,918 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 22:43:40,918 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 22:43:40,919 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 22:43:40,919 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 22:43:40,919 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 22:43:40,919 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 22:43:40,919 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 22:43:40,920 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 22:43:40,920 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 22:43:40,920 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 22:43:40,920 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 22:43:40,921 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 22:43:40,921 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 22:43:40,921 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 22:43:40,921 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=WIDEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDEST; [2020-08-18 22:43:41,267 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 22:43:41,287 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 22:43:41,294 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 22:43:41,298 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 22:43:41,299 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 22:43:41,300 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_10.c [2020-08-18 22:43:41,382 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3a9ee6149/48debdf263f444688f2ef4ea6ab9ef3c/FLAG22126b6dd [2020-08-18 22:43:41,885 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 22:43:41,886 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_10.c [2020-08-18 22:43:41,899 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3a9ee6149/48debdf263f444688f2ef4ea6ab9ef3c/FLAG22126b6dd [2020-08-18 22:43:42,216 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3a9ee6149/48debdf263f444688f2ef4ea6ab9ef3c [2020-08-18 22:43:42,225 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 22:43:42,226 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 22:43:42,227 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 22:43:42,227 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 22:43:42,231 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 22:43:42,232 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:43:42" (1/1) ... [2020-08-18 22:43:42,235 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2df08b93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:42, skipping insertion in model container [2020-08-18 22:43:42,236 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:43:42" (1/1) ... [2020-08-18 22:43:42,244 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 22:43:42,266 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 22:43:42,532 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:43:42,537 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 22:43:42,589 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:43:42,612 INFO L208 MainTranslator]: Completed translation [2020-08-18 22:43:42,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:42 WrapperNode [2020-08-18 22:43:42,613 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 22:43:42,614 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 22:43:42,614 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 22:43:42,614 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 22:43:42,710 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:42" (1/1) ... [2020-08-18 22:43:42,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:42" (1/1) ... [2020-08-18 22:43:42,719 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:42" (1/1) ... [2020-08-18 22:43:42,719 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:42" (1/1) ... [2020-08-18 22:43:42,730 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:42" (1/1) ... [2020-08-18 22:43:42,738 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:42" (1/1) ... [2020-08-18 22:43:42,740 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:42" (1/1) ... [2020-08-18 22:43:42,742 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 22:43:42,743 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 22:43:42,743 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 22:43:42,743 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 22:43:42,744 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:42" (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 22:43:42,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 22:43:42,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 22:43:42,801 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 22:43:42,801 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 22:43:42,801 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 22:43:42,801 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 22:43:42,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 22:43:42,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 22:43:43,099 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 22:43:43,099 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 22:43:43,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:43:43 BoogieIcfgContainer [2020-08-18 22:43:43,104 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 22:43:43,105 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 22:43:43,105 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 22:43:43,108 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 22:43:43,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 10:43:42" (1/3) ... [2020-08-18 22:43:43,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6319796a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:43:43, skipping insertion in model container [2020-08-18 22:43:43,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:43:42" (2/3) ... [2020-08-18 22:43:43,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6319796a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:43:43, skipping insertion in model container [2020-08-18 22:43:43,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:43:43" (3/3) ... [2020-08-18 22:43:43,112 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_10.c [2020-08-18 22:43:43,127 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 22:43:43,142 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 22:43:43,169 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 22:43:43,198 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 22:43:43,199 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 22:43:43,199 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 22:43:43,199 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 22:43:43,199 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 22:43:43,200 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 22:43:43,200 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 22:43:43,200 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 22:43:43,222 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-08-18 22:43:43,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 22:43:43,229 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:43,230 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:43,231 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:43,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:43,238 INFO L82 PathProgramCache]: Analyzing trace with hash -917347053, now seen corresponding path program 1 times [2020-08-18 22:43:43,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:43,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773200182] [2020-08-18 22:43:43,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:43,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:43,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:43,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:43,489 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 22:43:43,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773200182] [2020-08-18 22:43:43,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:43,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:43,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068530609] [2020-08-18 22:43:43,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:43,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:43,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:43,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:43,519 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 3 states. [2020-08-18 22:43:43,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:43,603 INFO L93 Difference]: Finished difference Result 87 states and 150 transitions. [2020-08-18 22:43:43,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:43,605 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 22:43:43,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:43,615 INFO L225 Difference]: With dead ends: 87 [2020-08-18 22:43:43,616 INFO L226 Difference]: Without dead ends: 72 [2020-08-18 22:43:43,619 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 22:43:43,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-18 22:43:43,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-08-18 22:43:43,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-18 22:43:43,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 89 transitions. [2020-08-18 22:43:43,664 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 89 transitions. Word has length 20 [2020-08-18 22:43:43,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:43,665 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 89 transitions. [2020-08-18 22:43:43,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:43,665 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 89 transitions. [2020-08-18 22:43:43,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 22:43:43,666 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:43,667 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 22:43:43,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 22:43:43,667 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:43,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:43,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1504153067, now seen corresponding path program 1 times [2020-08-18 22:43:43,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:43,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2073373137] [2020-08-18 22:43:43,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:43,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:43,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:43,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:43,736 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 22:43:43,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2073373137] [2020-08-18 22:43:43,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:43,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:43,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676335382] [2020-08-18 22:43:43,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:43,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:43,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:43,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:43,741 INFO L87 Difference]: Start difference. First operand 50 states and 89 transitions. Second operand 3 states. [2020-08-18 22:43:43,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:43,768 INFO L93 Difference]: Finished difference Result 117 states and 212 transitions. [2020-08-18 22:43:43,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:43,768 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 22:43:43,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:43,771 INFO L225 Difference]: With dead ends: 117 [2020-08-18 22:43:43,771 INFO L226 Difference]: Without dead ends: 72 [2020-08-18 22:43:43,772 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 22:43:43,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-18 22:43:43,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-08-18 22:43:43,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-18 22:43:43,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 125 transitions. [2020-08-18 22:43:43,794 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 125 transitions. Word has length 20 [2020-08-18 22:43:43,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:43,795 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 125 transitions. [2020-08-18 22:43:43,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:43,795 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 125 transitions. [2020-08-18 22:43:43,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 22:43:43,796 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:43,797 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 22:43:43,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 22:43:43,797 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:43,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:43,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1627225809, now seen corresponding path program 1 times [2020-08-18 22:43:43,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:43,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [878450814] [2020-08-18 22:43:43,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:43,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:43,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:43,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:43,891 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 22:43:43,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [878450814] [2020-08-18 22:43:43,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:43,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:43,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600117972] [2020-08-18 22:43:43,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:43,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:43,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:43,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:43,894 INFO L87 Difference]: Start difference. First operand 70 states and 125 transitions. Second operand 3 states. [2020-08-18 22:43:43,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:43,924 INFO L93 Difference]: Finished difference Result 108 states and 189 transitions. [2020-08-18 22:43:43,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:43,925 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 22:43:43,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:43,927 INFO L225 Difference]: With dead ends: 108 [2020-08-18 22:43:43,927 INFO L226 Difference]: Without dead ends: 75 [2020-08-18 22:43:43,928 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 22:43:43,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-18 22:43:43,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2020-08-18 22:43:43,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-18 22:43:43,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 127 transitions. [2020-08-18 22:43:43,949 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 127 transitions. Word has length 21 [2020-08-18 22:43:43,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:43,950 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 127 transitions. [2020-08-18 22:43:43,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:43,950 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 127 transitions. [2020-08-18 22:43:43,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 22:43:43,951 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:43,951 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 22:43:43,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 22:43:43,952 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:43,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:43,952 INFO L82 PathProgramCache]: Analyzing trace with hash 616108559, now seen corresponding path program 1 times [2020-08-18 22:43:43,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:43,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [604352418] [2020-08-18 22:43:43,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:43,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:44,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:44,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:44,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:44,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [604352418] [2020-08-18 22:43:44,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:44,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:44,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503488467] [2020-08-18 22:43:44,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:44,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:44,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:44,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:44,013 INFO L87 Difference]: Start difference. First operand 73 states and 127 transitions. Second operand 3 states. [2020-08-18 22:43:44,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:44,050 INFO L93 Difference]: Finished difference Result 136 states and 240 transitions. [2020-08-18 22:43:44,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:44,051 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 22:43:44,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:44,053 INFO L225 Difference]: With dead ends: 136 [2020-08-18 22:43:44,053 INFO L226 Difference]: Without dead ends: 134 [2020-08-18 22:43:44,054 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 22:43:44,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-08-18 22:43:44,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 96. [2020-08-18 22:43:44,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-18 22:43:44,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 168 transitions. [2020-08-18 22:43:44,070 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 168 transitions. Word has length 21 [2020-08-18 22:43:44,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:44,071 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 168 transitions. [2020-08-18 22:43:44,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:44,071 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 168 transitions. [2020-08-18 22:43:44,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 22:43:44,075 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:44,075 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 22:43:44,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 22:43:44,076 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:44,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:44,076 INFO L82 PathProgramCache]: Analyzing trace with hash 29302545, now seen corresponding path program 1 times [2020-08-18 22:43:44,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:44,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [214619990] [2020-08-18 22:43:44,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:44,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:44,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:44,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:44,127 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 22:43:44,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [214619990] [2020-08-18 22:43:44,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:44,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:44,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095587341] [2020-08-18 22:43:44,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:44,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:44,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:44,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:44,134 INFO L87 Difference]: Start difference. First operand 96 states and 168 transitions. Second operand 3 states. [2020-08-18 22:43:44,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:44,173 INFO L93 Difference]: Finished difference Result 224 states and 398 transitions. [2020-08-18 22:43:44,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:44,174 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 22:43:44,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:44,176 INFO L225 Difference]: With dead ends: 224 [2020-08-18 22:43:44,176 INFO L226 Difference]: Without dead ends: 136 [2020-08-18 22:43:44,179 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 22:43:44,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-08-18 22:43:44,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2020-08-18 22:43:44,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-08-18 22:43:44,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 234 transitions. [2020-08-18 22:43:44,193 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 234 transitions. Word has length 21 [2020-08-18 22:43:44,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:44,194 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 234 transitions. [2020-08-18 22:43:44,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:44,194 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 234 transitions. [2020-08-18 22:43:44,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 22:43:44,196 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:44,196 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 22:43:44,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 22:43:44,196 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:44,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:44,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1919709866, now seen corresponding path program 1 times [2020-08-18 22:43:44,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:44,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [403705086] [2020-08-18 22:43:44,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:44,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:44,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:44,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:44,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:43:44,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [403705086] [2020-08-18 22:43:44,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:44,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:44,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597598581] [2020-08-18 22:43:44,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:44,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:44,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:44,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:44,239 INFO L87 Difference]: Start difference. First operand 134 states and 234 transitions. Second operand 3 states. [2020-08-18 22:43:44,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:44,259 INFO L93 Difference]: Finished difference Result 201 states and 349 transitions. [2020-08-18 22:43:44,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:44,260 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 22:43:44,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:44,262 INFO L225 Difference]: With dead ends: 201 [2020-08-18 22:43:44,262 INFO L226 Difference]: Without dead ends: 138 [2020-08-18 22:43:44,263 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 22:43:44,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-18 22:43:44,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-08-18 22:43:44,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-08-18 22:43:44,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 234 transitions. [2020-08-18 22:43:44,275 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 234 transitions. Word has length 22 [2020-08-18 22:43:44,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:44,276 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 234 transitions. [2020-08-18 22:43:44,276 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:44,276 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 234 transitions. [2020-08-18 22:43:44,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 22:43:44,278 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:44,278 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 22:43:44,278 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 22:43:44,278 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:44,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:44,279 INFO L82 PathProgramCache]: Analyzing trace with hash 908592616, now seen corresponding path program 1 times [2020-08-18 22:43:44,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:44,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164441446] [2020-08-18 22:43:44,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:44,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:44,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:44,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:44,357 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 22:43:44,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164441446] [2020-08-18 22:43:44,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:44,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:44,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736816990] [2020-08-18 22:43:44,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:44,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:44,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:44,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:44,360 INFO L87 Difference]: Start difference. First operand 136 states and 234 transitions. Second operand 3 states. [2020-08-18 22:43:44,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:44,379 INFO L93 Difference]: Finished difference Result 252 states and 440 transitions. [2020-08-18 22:43:44,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:44,379 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 22:43:44,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:44,382 INFO L225 Difference]: With dead ends: 252 [2020-08-18 22:43:44,382 INFO L226 Difference]: Without dead ends: 250 [2020-08-18 22:43:44,382 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 22:43:44,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-18 22:43:44,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 184. [2020-08-18 22:43:44,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-08-18 22:43:44,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 314 transitions. [2020-08-18 22:43:44,396 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 314 transitions. Word has length 22 [2020-08-18 22:43:44,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:44,397 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 314 transitions. [2020-08-18 22:43:44,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:44,397 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 314 transitions. [2020-08-18 22:43:44,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 22:43:44,399 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:44,399 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 22:43:44,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 22:43:44,400 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:44,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:44,400 INFO L82 PathProgramCache]: Analyzing trace with hash 321786602, now seen corresponding path program 1 times [2020-08-18 22:43:44,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:44,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2138137566] [2020-08-18 22:43:44,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:44,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:44,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:44,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:44,432 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 22:43:44,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2138137566] [2020-08-18 22:43:44,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:44,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:44,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68591730] [2020-08-18 22:43:44,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:44,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:44,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:44,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:44,434 INFO L87 Difference]: Start difference. First operand 184 states and 314 transitions. Second operand 3 states. [2020-08-18 22:43:44,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:44,455 INFO L93 Difference]: Finished difference Result 432 states and 744 transitions. [2020-08-18 22:43:44,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:44,456 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 22:43:44,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:44,458 INFO L225 Difference]: With dead ends: 432 [2020-08-18 22:43:44,458 INFO L226 Difference]: Without dead ends: 258 [2020-08-18 22:43:44,460 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 22:43:44,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-08-18 22:43:44,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2020-08-18 22:43:44,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-08-18 22:43:44,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 434 transitions. [2020-08-18 22:43:44,476 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 434 transitions. Word has length 22 [2020-08-18 22:43:44,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:44,476 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 434 transitions. [2020-08-18 22:43:44,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:44,477 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 434 transitions. [2020-08-18 22:43:44,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 22:43:44,479 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:44,479 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 22:43:44,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 22:43:44,479 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:44,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:44,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1898185914, now seen corresponding path program 1 times [2020-08-18 22:43:44,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:44,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [77911207] [2020-08-18 22:43:44,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:44,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:44,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:44,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:44,516 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 22:43:44,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [77911207] [2020-08-18 22:43:44,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:44,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:44,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469042644] [2020-08-18 22:43:44,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:44,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:44,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:44,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:44,519 INFO L87 Difference]: Start difference. First operand 256 states and 434 transitions. Second operand 3 states. [2020-08-18 22:43:44,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:44,538 INFO L93 Difference]: Finished difference Result 384 states and 648 transitions. [2020-08-18 22:43:44,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:44,539 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 22:43:44,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:44,541 INFO L225 Difference]: With dead ends: 384 [2020-08-18 22:43:44,541 INFO L226 Difference]: Without dead ends: 262 [2020-08-18 22:43:44,543 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 22:43:44,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-08-18 22:43:44,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 260. [2020-08-18 22:43:44,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-08-18 22:43:44,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 434 transitions. [2020-08-18 22:43:44,556 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 434 transitions. Word has length 23 [2020-08-18 22:43:44,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:44,557 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 434 transitions. [2020-08-18 22:43:44,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:44,557 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 434 transitions. [2020-08-18 22:43:44,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 22:43:44,559 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:44,559 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 22:43:44,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 22:43:44,559 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:44,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:44,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1385664132, now seen corresponding path program 1 times [2020-08-18 22:43:44,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:44,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1905801288] [2020-08-18 22:43:44,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:44,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:44,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:44,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:44,610 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 22:43:44,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1905801288] [2020-08-18 22:43:44,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:44,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:44,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17829745] [2020-08-18 22:43:44,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:44,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:44,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:44,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:44,613 INFO L87 Difference]: Start difference. First operand 260 states and 434 transitions. Second operand 3 states. [2020-08-18 22:43:44,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:44,635 INFO L93 Difference]: Finished difference Result 476 states and 808 transitions. [2020-08-18 22:43:44,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:44,635 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 22:43:44,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:44,639 INFO L225 Difference]: With dead ends: 476 [2020-08-18 22:43:44,639 INFO L226 Difference]: Without dead ends: 474 [2020-08-18 22:43:44,640 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 22:43:44,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2020-08-18 22:43:44,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 360. [2020-08-18 22:43:44,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-08-18 22:43:44,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 590 transitions. [2020-08-18 22:43:44,655 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 590 transitions. Word has length 23 [2020-08-18 22:43:44,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:44,655 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 590 transitions. [2020-08-18 22:43:44,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:44,656 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 590 transitions. [2020-08-18 22:43:44,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 22:43:44,658 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:44,658 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 22:43:44,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 22:43:44,659 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:44,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:44,659 INFO L82 PathProgramCache]: Analyzing trace with hash 798858118, now seen corresponding path program 1 times [2020-08-18 22:43:44,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:44,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [725832356] [2020-08-18 22:43:44,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:44,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:44,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:44,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:44,684 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 22:43:44,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [725832356] [2020-08-18 22:43:44,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:44,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:44,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568101812] [2020-08-18 22:43:44,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:44,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:44,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:44,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:44,686 INFO L87 Difference]: Start difference. First operand 360 states and 590 transitions. Second operand 3 states. [2020-08-18 22:43:44,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:44,717 INFO L93 Difference]: Finished difference Result 844 states and 1392 transitions. [2020-08-18 22:43:44,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:44,718 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 22:43:44,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:44,721 INFO L225 Difference]: With dead ends: 844 [2020-08-18 22:43:44,721 INFO L226 Difference]: Without dead ends: 498 [2020-08-18 22:43:44,724 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 22:43:44,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2020-08-18 22:43:44,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 496. [2020-08-18 22:43:44,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 496 states. [2020-08-18 22:43:44,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 806 transitions. [2020-08-18 22:43:44,742 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 806 transitions. Word has length 23 [2020-08-18 22:43:44,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:44,742 INFO L479 AbstractCegarLoop]: Abstraction has 496 states and 806 transitions. [2020-08-18 22:43:44,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:44,743 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 806 transitions. [2020-08-18 22:43:44,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 22:43:44,744 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:44,744 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 22:43:44,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 22:43:44,745 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:44,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:44,745 INFO L82 PathProgramCache]: Analyzing trace with hash 6129535, now seen corresponding path program 1 times [2020-08-18 22:43:44,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:44,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [337473568] [2020-08-18 22:43:44,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:44,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:44,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:44,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:44,775 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 22:43:44,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [337473568] [2020-08-18 22:43:44,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:44,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:44,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853981355] [2020-08-18 22:43:44,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:44,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:44,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:44,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:44,777 INFO L87 Difference]: Start difference. First operand 496 states and 806 transitions. Second operand 3 states. [2020-08-18 22:43:44,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:44,806 INFO L93 Difference]: Finished difference Result 744 states and 1204 transitions. [2020-08-18 22:43:44,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:44,807 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 22:43:44,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:44,810 INFO L225 Difference]: With dead ends: 744 [2020-08-18 22:43:44,810 INFO L226 Difference]: Without dead ends: 506 [2020-08-18 22:43:44,811 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 22:43:44,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2020-08-18 22:43:44,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 504. [2020-08-18 22:43:44,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 504 states. [2020-08-18 22:43:44,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 806 transitions. [2020-08-18 22:43:44,827 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 806 transitions. Word has length 24 [2020-08-18 22:43:44,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:44,828 INFO L479 AbstractCegarLoop]: Abstraction has 504 states and 806 transitions. [2020-08-18 22:43:44,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:44,828 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 806 transitions. [2020-08-18 22:43:44,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 22:43:44,829 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:44,829 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 22:43:44,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 22:43:44,830 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:44,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:44,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1004987715, now seen corresponding path program 1 times [2020-08-18 22:43:44,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:44,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [257763842] [2020-08-18 22:43:44,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:44,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:44,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:44,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:44,855 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 22:43:44,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [257763842] [2020-08-18 22:43:44,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:44,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:44,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146042080] [2020-08-18 22:43:44,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:44,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:44,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:44,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:44,858 INFO L87 Difference]: Start difference. First operand 504 states and 806 transitions. Second operand 3 states. [2020-08-18 22:43:44,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:44,882 INFO L93 Difference]: Finished difference Result 908 states and 1480 transitions. [2020-08-18 22:43:44,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:44,883 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 22:43:44,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:44,888 INFO L225 Difference]: With dead ends: 908 [2020-08-18 22:43:44,888 INFO L226 Difference]: Without dead ends: 906 [2020-08-18 22:43:44,889 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 22:43:44,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2020-08-18 22:43:44,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 712. [2020-08-18 22:43:44,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2020-08-18 22:43:44,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1110 transitions. [2020-08-18 22:43:44,911 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1110 transitions. Word has length 24 [2020-08-18 22:43:44,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:44,911 INFO L479 AbstractCegarLoop]: Abstraction has 712 states and 1110 transitions. [2020-08-18 22:43:44,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:44,912 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1110 transitions. [2020-08-18 22:43:44,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 22:43:44,913 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:44,913 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, 1, 1] [2020-08-18 22:43:44,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 22:43:44,914 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:44,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:44,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1591793729, now seen corresponding path program 1 times [2020-08-18 22:43:44,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:44,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [128920345] [2020-08-18 22:43:44,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:44,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:44,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:44,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:44,941 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 22:43:44,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [128920345] [2020-08-18 22:43:44,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:44,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:44,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483321776] [2020-08-18 22:43:44,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:44,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:44,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:44,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:44,944 INFO L87 Difference]: Start difference. First operand 712 states and 1110 transitions. Second operand 3 states. [2020-08-18 22:43:44,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:44,979 INFO L93 Difference]: Finished difference Result 1660 states and 2600 transitions. [2020-08-18 22:43:44,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:44,980 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 22:43:44,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:44,985 INFO L225 Difference]: With dead ends: 1660 [2020-08-18 22:43:44,986 INFO L226 Difference]: Without dead ends: 970 [2020-08-18 22:43:44,988 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 22:43:44,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2020-08-18 22:43:45,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 968. [2020-08-18 22:43:45,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 968 states. [2020-08-18 22:43:45,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1494 transitions. [2020-08-18 22:43:45,024 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1494 transitions. Word has length 24 [2020-08-18 22:43:45,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:45,025 INFO L479 AbstractCegarLoop]: Abstraction has 968 states and 1494 transitions. [2020-08-18 22:43:45,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:45,025 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1494 transitions. [2020-08-18 22:43:45,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 22:43:45,027 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:45,027 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 22:43:45,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 22:43:45,027 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:45,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:45,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1089633349, now seen corresponding path program 1 times [2020-08-18 22:43:45,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:45,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2088893742] [2020-08-18 22:43:45,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:45,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:45,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:45,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:45,053 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 22:43:45,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2088893742] [2020-08-18 22:43:45,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:45,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:45,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511911264] [2020-08-18 22:43:45,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:45,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:45,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:45,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:45,056 INFO L87 Difference]: Start difference. First operand 968 states and 1494 transitions. Second operand 3 states. [2020-08-18 22:43:45,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:45,085 INFO L93 Difference]: Finished difference Result 1452 states and 2232 transitions. [2020-08-18 22:43:45,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:45,085 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 22:43:45,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:45,091 INFO L225 Difference]: With dead ends: 1452 [2020-08-18 22:43:45,091 INFO L226 Difference]: Without dead ends: 986 [2020-08-18 22:43:45,093 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 22:43:45,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2020-08-18 22:43:45,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 984. [2020-08-18 22:43:45,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 984 states. [2020-08-18 22:43:45,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 1494 transitions. [2020-08-18 22:43:45,140 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 1494 transitions. Word has length 25 [2020-08-18 22:43:45,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:45,141 INFO L479 AbstractCegarLoop]: Abstraction has 984 states and 1494 transitions. [2020-08-18 22:43:45,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:45,141 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 1494 transitions. [2020-08-18 22:43:45,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 22:43:45,143 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:45,143 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 22:43:45,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 22:43:45,143 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:45,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:45,144 INFO L82 PathProgramCache]: Analyzing trace with hash -2100750599, now seen corresponding path program 1 times [2020-08-18 22:43:45,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:45,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [587064671] [2020-08-18 22:43:45,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:45,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:45,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:45,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:45,166 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 22:43:45,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [587064671] [2020-08-18 22:43:45,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:45,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:45,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521617725] [2020-08-18 22:43:45,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:45,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:45,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:45,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:45,168 INFO L87 Difference]: Start difference. First operand 984 states and 1494 transitions. Second operand 3 states. [2020-08-18 22:43:45,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:45,200 INFO L93 Difference]: Finished difference Result 1740 states and 2696 transitions. [2020-08-18 22:43:45,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:45,201 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 22:43:45,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:45,210 INFO L225 Difference]: With dead ends: 1740 [2020-08-18 22:43:45,210 INFO L226 Difference]: Without dead ends: 1738 [2020-08-18 22:43:45,211 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 22:43:45,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2020-08-18 22:43:45,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1416. [2020-08-18 22:43:45,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1416 states. [2020-08-18 22:43:45,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 2086 transitions. [2020-08-18 22:43:45,253 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 2086 transitions. Word has length 25 [2020-08-18 22:43:45,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:45,253 INFO L479 AbstractCegarLoop]: Abstraction has 1416 states and 2086 transitions. [2020-08-18 22:43:45,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:45,254 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 2086 transitions. [2020-08-18 22:43:45,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 22:43:45,256 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:45,256 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 22:43:45,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 22:43:45,257 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:45,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:45,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1607410683, now seen corresponding path program 1 times [2020-08-18 22:43:45,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:45,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [627736348] [2020-08-18 22:43:45,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:45,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:45,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:45,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:45,278 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 22:43:45,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [627736348] [2020-08-18 22:43:45,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:45,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:45,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014681551] [2020-08-18 22:43:45,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:45,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:45,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:45,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:45,281 INFO L87 Difference]: Start difference. First operand 1416 states and 2086 transitions. Second operand 3 states. [2020-08-18 22:43:45,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:45,326 INFO L93 Difference]: Finished difference Result 3276 states and 4840 transitions. [2020-08-18 22:43:45,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:45,327 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 22:43:45,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:45,336 INFO L225 Difference]: With dead ends: 3276 [2020-08-18 22:43:45,336 INFO L226 Difference]: Without dead ends: 1898 [2020-08-18 22:43:45,340 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 22:43:45,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2020-08-18 22:43:45,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1896. [2020-08-18 22:43:45,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1896 states. [2020-08-18 22:43:45,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 2758 transitions. [2020-08-18 22:43:45,394 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 2758 transitions. Word has length 25 [2020-08-18 22:43:45,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:45,395 INFO L479 AbstractCegarLoop]: Abstraction has 1896 states and 2758 transitions. [2020-08-18 22:43:45,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:45,395 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 2758 transitions. [2020-08-18 22:43:45,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 22:43:45,398 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:45,398 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 22:43:45,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 22:43:45,398 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:45,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:45,399 INFO L82 PathProgramCache]: Analyzing trace with hash -698544044, now seen corresponding path program 1 times [2020-08-18 22:43:45,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:45,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [95776738] [2020-08-18 22:43:45,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:45,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:45,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:45,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:45,426 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 22:43:45,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [95776738] [2020-08-18 22:43:45,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:45,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:45,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22180009] [2020-08-18 22:43:45,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:45,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:45,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:45,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:45,431 INFO L87 Difference]: Start difference. First operand 1896 states and 2758 transitions. Second operand 3 states. [2020-08-18 22:43:45,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:45,478 INFO L93 Difference]: Finished difference Result 2844 states and 4120 transitions. [2020-08-18 22:43:45,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:45,479 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-18 22:43:45,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:45,488 INFO L225 Difference]: With dead ends: 2844 [2020-08-18 22:43:45,489 INFO L226 Difference]: Without dead ends: 1930 [2020-08-18 22:43:45,491 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 22:43:45,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-18 22:43:45,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1928. [2020-08-18 22:43:45,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1928 states. [2020-08-18 22:43:45,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 2758 transitions. [2020-08-18 22:43:45,550 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 2758 transitions. Word has length 26 [2020-08-18 22:43:45,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:45,551 INFO L479 AbstractCegarLoop]: Abstraction has 1928 states and 2758 transitions. [2020-08-18 22:43:45,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:45,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 2758 transitions. [2020-08-18 22:43:45,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 22:43:45,555 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:45,555 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 22:43:45,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 22:43:45,555 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:45,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:45,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1709661294, now seen corresponding path program 1 times [2020-08-18 22:43:45,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:45,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [309644338] [2020-08-18 22:43:45,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:45,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:45,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:45,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:45,592 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 22:43:45,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [309644338] [2020-08-18 22:43:45,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:45,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:45,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455561813] [2020-08-18 22:43:45,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:45,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:45,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:45,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:45,597 INFO L87 Difference]: Start difference. First operand 1928 states and 2758 transitions. Second operand 3 states. [2020-08-18 22:43:45,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:45,672 INFO L93 Difference]: Finished difference Result 3340 states and 4872 transitions. [2020-08-18 22:43:45,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:45,673 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-18 22:43:45,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:45,695 INFO L225 Difference]: With dead ends: 3340 [2020-08-18 22:43:45,695 INFO L226 Difference]: Without dead ends: 3338 [2020-08-18 22:43:45,697 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 22:43:45,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2020-08-18 22:43:45,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 2824. [2020-08-18 22:43:45,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2824 states. [2020-08-18 22:43:45,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2824 states to 2824 states and 3910 transitions. [2020-08-18 22:43:45,820 INFO L78 Accepts]: Start accepts. Automaton has 2824 states and 3910 transitions. Word has length 26 [2020-08-18 22:43:45,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:45,820 INFO L479 AbstractCegarLoop]: Abstraction has 2824 states and 3910 transitions. [2020-08-18 22:43:45,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:45,821 INFO L276 IsEmpty]: Start isEmpty. Operand 2824 states and 3910 transitions. [2020-08-18 22:43:45,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 22:43:45,831 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:45,831 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 22:43:45,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 22:43:45,832 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:45,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:45,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1998499988, now seen corresponding path program 1 times [2020-08-18 22:43:45,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:45,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1591789663] [2020-08-18 22:43:45,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:45,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:45,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:45,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:45,864 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 22:43:45,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1591789663] [2020-08-18 22:43:45,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:45,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:45,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521715613] [2020-08-18 22:43:45,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:45,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:45,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:45,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:45,867 INFO L87 Difference]: Start difference. First operand 2824 states and 3910 transitions. Second operand 3 states. [2020-08-18 22:43:45,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:45,978 INFO L93 Difference]: Finished difference Result 6476 states and 8968 transitions. [2020-08-18 22:43:45,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:45,979 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-18 22:43:45,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:46,000 INFO L225 Difference]: With dead ends: 6476 [2020-08-18 22:43:46,000 INFO L226 Difference]: Without dead ends: 3722 [2020-08-18 22:43:46,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:46,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2020-08-18 22:43:46,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3720. [2020-08-18 22:43:46,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3720 states. [2020-08-18 22:43:46,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3720 states to 3720 states and 5062 transitions. [2020-08-18 22:43:46,128 INFO L78 Accepts]: Start accepts. Automaton has 3720 states and 5062 transitions. Word has length 26 [2020-08-18 22:43:46,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:46,128 INFO L479 AbstractCegarLoop]: Abstraction has 3720 states and 5062 transitions. [2020-08-18 22:43:46,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:46,129 INFO L276 IsEmpty]: Start isEmpty. Operand 3720 states and 5062 transitions. [2020-08-18 22:43:46,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 22:43:46,134 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:46,134 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 22:43:46,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 22:43:46,138 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:46,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:46,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1459677136, now seen corresponding path program 1 times [2020-08-18 22:43:46,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:46,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449923166] [2020-08-18 22:43:46,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:46,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:46,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:46,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:46,170 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 22:43:46,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449923166] [2020-08-18 22:43:46,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:46,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:46,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966738643] [2020-08-18 22:43:46,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:46,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:46,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:46,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:46,172 INFO L87 Difference]: Start difference. First operand 3720 states and 5062 transitions. Second operand 3 states. [2020-08-18 22:43:46,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:46,239 INFO L93 Difference]: Finished difference Result 5580 states and 7560 transitions. [2020-08-18 22:43:46,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:46,239 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-18 22:43:46,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:46,257 INFO L225 Difference]: With dead ends: 5580 [2020-08-18 22:43:46,257 INFO L226 Difference]: Without dead ends: 3786 [2020-08-18 22:43:46,262 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 22:43:46,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3786 states. [2020-08-18 22:43:46,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3786 to 3784. [2020-08-18 22:43:46,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3784 states. [2020-08-18 22:43:46,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3784 states to 3784 states and 5062 transitions. [2020-08-18 22:43:46,403 INFO L78 Accepts]: Start accepts. Automaton has 3784 states and 5062 transitions. Word has length 27 [2020-08-18 22:43:46,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:46,404 INFO L479 AbstractCegarLoop]: Abstraction has 3784 states and 5062 transitions. [2020-08-18 22:43:46,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:46,404 INFO L276 IsEmpty]: Start isEmpty. Operand 3784 states and 5062 transitions. [2020-08-18 22:43:46,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 22:43:46,409 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:46,409 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:46,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-18 22:43:46,409 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:46,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:46,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1824172910, now seen corresponding path program 1 times [2020-08-18 22:43:46,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:46,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [882073020] [2020-08-18 22:43:46,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:46,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:46,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:46,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:46,450 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 22:43:46,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [882073020] [2020-08-18 22:43:46,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:46,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:46,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43594561] [2020-08-18 22:43:46,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:46,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:46,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:46,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:46,452 INFO L87 Difference]: Start difference. First operand 3784 states and 5062 transitions. Second operand 3 states. [2020-08-18 22:43:46,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:46,573 INFO L93 Difference]: Finished difference Result 10956 states and 14408 transitions. [2020-08-18 22:43:46,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:46,574 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-18 22:43:46,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:46,631 INFO L225 Difference]: With dead ends: 10956 [2020-08-18 22:43:46,632 INFO L226 Difference]: Without dead ends: 7306 [2020-08-18 22:43:46,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:46,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7306 states. [2020-08-18 22:43:46,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7306 to 7304. [2020-08-18 22:43:46,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7304 states. [2020-08-18 22:43:46,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 9350 transitions. [2020-08-18 22:43:46,905 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 9350 transitions. Word has length 27 [2020-08-18 22:43:46,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:46,905 INFO L479 AbstractCegarLoop]: Abstraction has 7304 states and 9350 transitions. [2020-08-18 22:43:46,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:46,906 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 9350 transitions. [2020-08-18 22:43:46,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 22:43:46,917 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:46,917 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:46,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-18 22:43:46,917 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:46,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:46,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1883988372, now seen corresponding path program 1 times [2020-08-18 22:43:46,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:46,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1032999067] [2020-08-18 22:43:46,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:46,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:46,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:46,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:46,941 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 22:43:46,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1032999067] [2020-08-18 22:43:46,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:46,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:46,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490277641] [2020-08-18 22:43:46,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:46,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:46,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:46,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:46,943 INFO L87 Difference]: Start difference. First operand 7304 states and 9350 transitions. Second operand 3 states. [2020-08-18 22:43:47,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:47,138 INFO L93 Difference]: Finished difference Result 8076 states and 10632 transitions. [2020-08-18 22:43:47,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:47,139 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-18 22:43:47,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:47,154 INFO L225 Difference]: With dead ends: 8076 [2020-08-18 22:43:47,154 INFO L226 Difference]: Without dead ends: 8074 [2020-08-18 22:43:47,156 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 22:43:47,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2020-08-18 22:43:47,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 7304. [2020-08-18 22:43:47,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7304 states. [2020-08-18 22:43:47,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 9222 transitions. [2020-08-18 22:43:47,352 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 9222 transitions. Word has length 27 [2020-08-18 22:43:47,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:47,353 INFO L479 AbstractCegarLoop]: Abstraction has 7304 states and 9222 transitions. [2020-08-18 22:43:47,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:47,353 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 9222 transitions. [2020-08-18 22:43:47,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 22:43:47,370 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:47,370 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 22:43:47,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-18 22:43:47,370 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:47,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:47,372 INFO L82 PathProgramCache]: Analyzing trace with hash 715001129, now seen corresponding path program 1 times [2020-08-18 22:43:47,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:47,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [284620462] [2020-08-18 22:43:47,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:47,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:47,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:47,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:47,431 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 22:43:47,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [284620462] [2020-08-18 22:43:47,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:47,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:47,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390653793] [2020-08-18 22:43:47,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:47,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:47,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:47,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:47,434 INFO L87 Difference]: Start difference. First operand 7304 states and 9222 transitions. Second operand 3 states. [2020-08-18 22:43:47,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:47,638 INFO L93 Difference]: Finished difference Result 12172 states and 15496 transitions. [2020-08-18 22:43:47,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:47,639 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-18 22:43:47,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:47,663 INFO L225 Difference]: With dead ends: 12172 [2020-08-18 22:43:47,663 INFO L226 Difference]: Without dead ends: 12170 [2020-08-18 22:43:47,669 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 22:43:47,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12170 states. [2020-08-18 22:43:47,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12170 to 11144. [2020-08-18 22:43:47,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11144 states. [2020-08-18 22:43:47,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11144 states to 11144 states and 13702 transitions. [2020-08-18 22:43:47,960 INFO L78 Accepts]: Start accepts. Automaton has 11144 states and 13702 transitions. Word has length 28 [2020-08-18 22:43:47,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:47,961 INFO L479 AbstractCegarLoop]: Abstraction has 11144 states and 13702 transitions. [2020-08-18 22:43:47,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:47,961 INFO L276 IsEmpty]: Start isEmpty. Operand 11144 states and 13702 transitions. [2020-08-18 22:43:47,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 22:43:47,978 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:47,978 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:43:47,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-18 22:43:47,978 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:47,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:47,979 INFO L82 PathProgramCache]: Analyzing trace with hash 128195115, now seen corresponding path program 1 times [2020-08-18 22:43:47,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:47,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114330867] [2020-08-18 22:43:47,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:47,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:48,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:48,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:48,004 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 22:43:48,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [114330867] [2020-08-18 22:43:48,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:48,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:48,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442429382] [2020-08-18 22:43:48,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:48,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:48,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:48,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:48,006 INFO L87 Difference]: Start difference. First operand 11144 states and 13702 transitions. Second operand 3 states. [2020-08-18 22:43:48,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:48,205 INFO L93 Difference]: Finished difference Result 25228 states and 30856 transitions. [2020-08-18 22:43:48,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:48,206 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-18 22:43:48,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:48,233 INFO L225 Difference]: With dead ends: 25228 [2020-08-18 22:43:48,234 INFO L226 Difference]: Without dead ends: 14218 [2020-08-18 22:43:48,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:48,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14218 states. [2020-08-18 22:43:48,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14218 to 14216. [2020-08-18 22:43:48,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14216 states. [2020-08-18 22:43:48,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14216 states to 14216 states and 16902 transitions. [2020-08-18 22:43:48,702 INFO L78 Accepts]: Start accepts. Automaton has 14216 states and 16902 transitions. Word has length 28 [2020-08-18 22:43:48,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:48,702 INFO L479 AbstractCegarLoop]: Abstraction has 14216 states and 16902 transitions. [2020-08-18 22:43:48,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:48,702 INFO L276 IsEmpty]: Start isEmpty. Operand 14216 states and 16902 transitions. [2020-08-18 22:43:48,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-18 22:43:48,719 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:48,720 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 22:43:48,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-18 22:43:48,720 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:48,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:48,720 INFO L82 PathProgramCache]: Analyzing trace with hash 690414627, now seen corresponding path program 1 times [2020-08-18 22:43:48,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:48,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [214878828] [2020-08-18 22:43:48,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:48,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:48,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:48,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:48,740 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 22:43:48,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [214878828] [2020-08-18 22:43:48,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:48,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:48,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181580359] [2020-08-18 22:43:48,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:48,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:48,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:48,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:48,742 INFO L87 Difference]: Start difference. First operand 14216 states and 16902 transitions. Second operand 3 states. [2020-08-18 22:43:48,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:48,909 INFO L93 Difference]: Finished difference Result 21516 states and 25608 transitions. [2020-08-18 22:43:48,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:48,910 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-18 22:43:48,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:48,937 INFO L225 Difference]: With dead ends: 21516 [2020-08-18 22:43:48,938 INFO L226 Difference]: Without dead ends: 14602 [2020-08-18 22:43:48,954 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 22:43:48,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14602 states. [2020-08-18 22:43:49,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14602 to 14600. [2020-08-18 22:43:49,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14600 states. [2020-08-18 22:43:49,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14600 states to 14600 states and 17158 transitions. [2020-08-18 22:43:49,690 INFO L78 Accepts]: Start accepts. Automaton has 14600 states and 17158 transitions. Word has length 29 [2020-08-18 22:43:49,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:49,690 INFO L479 AbstractCegarLoop]: Abstraction has 14600 states and 17158 transitions. [2020-08-18 22:43:49,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:49,690 INFO L276 IsEmpty]: Start isEmpty. Operand 14600 states and 17158 transitions. [2020-08-18 22:43:49,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-18 22:43:49,708 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:49,708 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 22:43:49,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-18 22:43:49,708 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:49,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:49,709 INFO L82 PathProgramCache]: Analyzing trace with hash -320702623, now seen corresponding path program 1 times [2020-08-18 22:43:49,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:49,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1175328082] [2020-08-18 22:43:49,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:49,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:49,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:49,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:49,738 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 22:43:49,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1175328082] [2020-08-18 22:43:49,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:49,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:49,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390645135] [2020-08-18 22:43:49,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:49,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:49,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:49,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:49,740 INFO L87 Difference]: Start difference. First operand 14600 states and 17158 transitions. Second operand 3 states. [2020-08-18 22:43:49,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:49,981 INFO L93 Difference]: Finished difference Result 23562 states and 27399 transitions. [2020-08-18 22:43:49,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:49,981 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-18 22:43:49,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:50,026 INFO L225 Difference]: With dead ends: 23562 [2020-08-18 22:43:50,027 INFO L226 Difference]: Without dead ends: 23560 [2020-08-18 22:43:50,039 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 22:43:50,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23560 states. [2020-08-18 22:43:50,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23560 to 22536. [2020-08-18 22:43:50,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22536 states. [2020-08-18 22:43:50,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22536 states to 22536 states and 25862 transitions. [2020-08-18 22:43:50,537 INFO L78 Accepts]: Start accepts. Automaton has 22536 states and 25862 transitions. Word has length 29 [2020-08-18 22:43:50,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:50,538 INFO L479 AbstractCegarLoop]: Abstraction has 22536 states and 25862 transitions. [2020-08-18 22:43:50,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:50,538 INFO L276 IsEmpty]: Start isEmpty. Operand 22536 states and 25862 transitions. [2020-08-18 22:43:50,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-18 22:43:50,572 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:43:50,572 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 22:43:50,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-18 22:43:50,572 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:43:50,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:43:50,573 INFO L82 PathProgramCache]: Analyzing trace with hash -907508637, now seen corresponding path program 1 times [2020-08-18 22:43:50,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:43:50,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561674141] [2020-08-18 22:43:50,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:43:50,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:50,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:43:50,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:43:50,596 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 22:43:50,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561674141] [2020-08-18 22:43:50,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:43:50,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:43:50,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533899298] [2020-08-18 22:43:50,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:43:50,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:43:50,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:43:50,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:43:50,598 INFO L87 Difference]: Start difference. First operand 22536 states and 25862 transitions. Second operand 3 states. [2020-08-18 22:43:50,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:43:50,921 INFO L93 Difference]: Finished difference Result 50184 states and 56582 transitions. [2020-08-18 22:43:50,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:43:50,922 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-18 22:43:50,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:43:50,923 INFO L225 Difference]: With dead ends: 50184 [2020-08-18 22:43:50,923 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 22:43:50,983 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 22:43:50,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 22:43:50,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 22:43:50,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 22:43:50,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 22:43:50,985 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-08-18 22:43:50,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:43:50,985 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 22:43:50,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:43:50,985 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 22:43:50,985 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 22:43:50,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-18 22:43:50,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 22:43:51,109 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 22:43:51,109 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 22:43:51,109 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 22:43:51,109 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 22:43:51,109 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 22:43:51,110 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 22:43:51,110 INFO L271 CegarLoopResult]: At program point L159(lines 5 163) the Hoare annotation is: true [2020-08-18 22:43:51,110 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 163) no Hoare annotation was computed. [2020-08-18 22:43:51,110 INFO L268 CegarLoopResult]: For program point L118-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 22:43:51,110 INFO L268 CegarLoopResult]: For program point L143-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 22:43:51,110 INFO L268 CegarLoopResult]: For program point L102-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 22:43:51,110 INFO L268 CegarLoopResult]: For program point L94-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 22:43:51,110 INFO L268 CegarLoopResult]: For program point L119(line 119) no Hoare annotation was computed. [2020-08-18 22:43:51,110 INFO L268 CegarLoopResult]: For program point L86-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 22:43:51,111 INFO L268 CegarLoopResult]: For program point L144(line 144) no Hoare annotation was computed. [2020-08-18 22:43:51,111 INFO L268 CegarLoopResult]: For program point L78-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 22:43:51,111 INFO L268 CegarLoopResult]: For program point L70-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 22:43:51,111 INFO L268 CegarLoopResult]: For program point L128-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 22:43:51,111 INFO L271 CegarLoopResult]: At program point L153-1(lines 39 158) the Hoare annotation is: true [2020-08-18 22:43:51,111 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 163) no Hoare annotation was computed. [2020-08-18 22:43:51,111 INFO L268 CegarLoopResult]: For program point L129(line 129) no Hoare annotation was computed. [2020-08-18 22:43:51,111 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 161) no Hoare annotation was computed. [2020-08-18 22:43:51,111 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 163) the Hoare annotation is: true [2020-08-18 22:43:51,112 INFO L268 CegarLoopResult]: For program point L154(line 154) no Hoare annotation was computed. [2020-08-18 22:43:51,113 INFO L264 CegarLoopResult]: At program point L154-1(lines 5 163) the Hoare annotation is: false [2020-08-18 22:43:51,113 INFO L268 CegarLoopResult]: For program point L113-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 22:43:51,114 INFO L268 CegarLoopResult]: For program point L138-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 22:43:51,114 INFO L268 CegarLoopResult]: For program point L114(line 114) no Hoare annotation was computed. [2020-08-18 22:43:51,114 INFO L268 CegarLoopResult]: For program point L139(line 139) no Hoare annotation was computed. [2020-08-18 22:43:51,114 INFO L268 CegarLoopResult]: For program point L98-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 22:43:51,114 INFO L268 CegarLoopResult]: For program point L123-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 22:43:51,114 INFO L268 CegarLoopResult]: For program point L90-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 22:43:51,114 INFO L268 CegarLoopResult]: For program point L148-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 22:43:51,114 INFO L268 CegarLoopResult]: For program point L82-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 22:43:51,114 INFO L268 CegarLoopResult]: For program point L41(lines 41 43) no Hoare annotation was computed. [2020-08-18 22:43:51,115 INFO L268 CegarLoopResult]: For program point L74-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 22:43:51,115 INFO L268 CegarLoopResult]: For program point L66(lines 66 68) no Hoare annotation was computed. [2020-08-18 22:43:51,115 INFO L268 CegarLoopResult]: For program point L66-2(lines 39 158) no Hoare annotation was computed. [2020-08-18 22:43:51,115 INFO L268 CegarLoopResult]: For program point L124(line 124) no Hoare annotation was computed. [2020-08-18 22:43:51,115 INFO L268 CegarLoopResult]: For program point L149(line 149) no Hoare annotation was computed. [2020-08-18 22:43:51,115 INFO L268 CegarLoopResult]: For program point L108-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 22:43:51,115 INFO L268 CegarLoopResult]: For program point L133-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 22:43:51,115 INFO L268 CegarLoopResult]: For program point L109(line 109) no Hoare annotation was computed. [2020-08-18 22:43:51,115 INFO L268 CegarLoopResult]: For program point L134(line 134) no Hoare annotation was computed. [2020-08-18 22:43:51,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 10:43:51 BoogieIcfgContainer [2020-08-18 22:43:51,136 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 22:43:51,139 INFO L168 Benchmark]: Toolchain (without parser) took 8911.66 ms. Allocated memory was 139.5 MB in the beginning and 648.0 MB in the end (delta: 508.6 MB). Free memory was 102.9 MB in the beginning and 531.4 MB in the end (delta: -428.5 MB). Peak memory consumption was 379.4 MB. Max. memory is 7.1 GB. [2020-08-18 22:43:51,142 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.7 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-18 22:43:51,143 INFO L168 Benchmark]: CACSL2BoogieTranslator took 386.27 ms. Allocated memory is still 139.5 MB. Free memory was 102.7 MB in the beginning and 92.0 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2020-08-18 22:43:51,146 INFO L168 Benchmark]: Boogie Preprocessor took 128.55 ms. Allocated memory was 139.5 MB in the beginning and 200.3 MB in the end (delta: 60.8 MB). Free memory was 92.0 MB in the beginning and 177.7 MB in the end (delta: -85.8 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-08-18 22:43:51,147 INFO L168 Benchmark]: RCFGBuilder took 360.93 ms. Allocated memory is still 200.3 MB. Free memory was 177.7 MB in the beginning and 158.3 MB in the end (delta: 19.4 MB). Peak memory consumption was 19.4 MB. Max. memory is 7.1 GB. [2020-08-18 22:43:51,147 INFO L168 Benchmark]: TraceAbstraction took 8031.28 ms. Allocated memory was 200.3 MB in the beginning and 648.0 MB in the end (delta: 447.7 MB). Free memory was 157.7 MB in the beginning and 531.4 MB in the end (delta: -373.7 MB). Peak memory consumption was 373.3 MB. Max. memory is 7.1 GB. [2020-08-18 22:43:51,152 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.7 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 386.27 ms. Allocated memory is still 139.5 MB. Free memory was 102.7 MB in the beginning and 92.0 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 128.55 ms. Allocated memory was 139.5 MB in the beginning and 200.3 MB in the end (delta: 60.8 MB). Free memory was 92.0 MB in the beginning and 177.7 MB in the end (delta: -85.8 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 360.93 ms. Allocated memory is still 200.3 MB. Free memory was 177.7 MB in the beginning and 158.3 MB in the end (delta: 19.4 MB). Peak memory consumption was 19.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8031.28 ms. Allocated memory was 200.3 MB in the beginning and 648.0 MB in the end (delta: 447.7 MB). Free memory was 157.7 MB in the beginning and 531.4 MB in the end (delta: -373.7 MB). Peak memory consumption was 373.3 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: 7.7s, OverallIterations: 28, TraceHistogramMax: 1, AutomataDifference: 2.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2384 SDtfs, 1153 SDslu, 1624 SDs, 0 SdLazy, 149 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 140 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s 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: 3.2s 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...