/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_8.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 21:22:43,863 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 21:22:43,866 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 21:22:43,906 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-21 21:22:43,988 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 21:22:44,010 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 21:22:44,010 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 21:22:44,012 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 21:22:44,012 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 21:22:44,012 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 21:22:44,012 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 21:22:44,013 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 21:22:44,013 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 21:22:44,013 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 21:22:44,013 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 21:22:44,013 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 21:22:44,013 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 21:22:44,014 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 21:22:44,014 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 21:22:44,014 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 21:22:44,014 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 21:22:44,014 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 21:22:44,015 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 21:22:44,015 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 21:22:44,015 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 21:22:44,015 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 21:22:44,015 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 21:22:44,016 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 21:22:44,016 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 21:22:44,016 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 21:22:44,016 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 21:22:44,016 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 21:22:44,016 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 21:22:44,017 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 21:22:44,017 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; [2020-08-21 21:22:44,313 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 21:22:44,329 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 21:22:44,335 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 21:22:44,337 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 21:22:44,339 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 21:22:44,339 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_8.c [2020-08-21 21:22:44,407 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bd615014b/43ba79f65934470abb0e3cb8c0ab1da2/FLAGfd05d1e65 [2020-08-21 21:22:44,872 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 21:22:44,873 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_8.c [2020-08-21 21:22:44,881 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bd615014b/43ba79f65934470abb0e3cb8c0ab1da2/FLAGfd05d1e65 [2020-08-21 21:22:45,272 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bd615014b/43ba79f65934470abb0e3cb8c0ab1da2 [2020-08-21 21:22:45,281 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 21:22:45,283 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 21:22:45,284 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 21:22:45,284 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 21:22:45,291 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 21:22:45,292 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:22:45" (1/1) ... [2020-08-21 21:22:45,301 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ec04bb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:22:45, skipping insertion in model container [2020-08-21 21:22:45,301 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:22:45" (1/1) ... [2020-08-21 21:22:45,310 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 21:22:45,339 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 21:22:45,536 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 21:22:45,543 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 21:22:45,568 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 21:22:45,582 INFO L208 MainTranslator]: Completed translation [2020-08-21 21:22:45,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:22:45 WrapperNode [2020-08-21 21:22:45,582 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 21:22:45,583 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 21:22:45,583 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 21:22:45,583 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 21:22:45,685 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:22:45" (1/1) ... [2020-08-21 21:22:45,685 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:22:45" (1/1) ... [2020-08-21 21:22:45,693 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:22:45" (1/1) ... [2020-08-21 21:22:45,694 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:22:45" (1/1) ... [2020-08-21 21:22:45,709 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:22:45" (1/1) ... [2020-08-21 21:22:45,719 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:22:45" (1/1) ... [2020-08-21 21:22:45,721 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:22:45" (1/1) ... [2020-08-21 21:22:45,723 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 21:22:45,723 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 21:22:45,724 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 21:22:45,724 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 21:22:45,725 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:22:45" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 21:22:45,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 21:22:45,790 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 21:22:45,790 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 21:22:45,790 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 21:22:45,790 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 21:22:45,790 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 21:22:45,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 21:22:45,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 21:22:46,084 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 21:22:46,084 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 21:22:46,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:22:46 BoogieIcfgContainer [2020-08-21 21:22:46,090 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 21:22:46,091 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 21:22:46,091 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 21:22:46,094 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 21:22:46,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 09:22:45" (1/3) ... [2020-08-21 21:22:46,095 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@544114a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:22:46, skipping insertion in model container [2020-08-21 21:22:46,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:22:45" (2/3) ... [2020-08-21 21:22:46,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@544114a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:22:46, skipping insertion in model container [2020-08-21 21:22:46,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:22:46" (3/3) ... [2020-08-21 21:22:46,098 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_8.c [2020-08-21 21:22:46,111 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 21:22:46,120 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 21:22:46,138 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 21:22:46,166 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 21:22:46,166 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 21:22:46,166 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 21:22:46,167 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 21:22:46,167 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 21:22:46,167 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 21:22:46,167 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 21:22:46,167 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 21:22:46,190 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-08-21 21:22:46,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 21:22:46,198 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:46,199 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:46,200 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:46,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:46,207 INFO L82 PathProgramCache]: Analyzing trace with hash 577441593, now seen corresponding path program 1 times [2020-08-21 21:22:46,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:46,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [812091861] [2020-08-21 21:22:46,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:46,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:46,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:46,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:46,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:46,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [812091861] [2020-08-21 21:22:46,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:46,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:46,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079920654] [2020-08-21 21:22:46,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:46,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:46,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:46,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:46,438 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-08-21 21:22:46,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:46,497 INFO L93 Difference]: Finished difference Result 75 states and 126 transitions. [2020-08-21 21:22:46,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:46,499 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-21 21:22:46,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:46,513 INFO L225 Difference]: With dead ends: 75 [2020-08-21 21:22:46,513 INFO L226 Difference]: Without dead ends: 60 [2020-08-21 21:22:46,520 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:46,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-21 21:22:46,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 42. [2020-08-21 21:22:46,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-21 21:22:46,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 73 transitions. [2020-08-21 21:22:46,571 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 73 transitions. Word has length 18 [2020-08-21 21:22:46,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:46,572 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 73 transitions. [2020-08-21 21:22:46,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:46,572 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 73 transitions. [2020-08-21 21:22:46,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 21:22:46,574 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:46,574 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:46,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 21:22:46,575 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:46,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:46,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1278506171, now seen corresponding path program 1 times [2020-08-21 21:22:46,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:46,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909907427] [2020-08-21 21:22:46,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:46,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:46,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:46,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:46,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:46,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909907427] [2020-08-21 21:22:46,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:46,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:46,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224936095] [2020-08-21 21:22:46,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:46,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:46,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:46,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:46,655 INFO L87 Difference]: Start difference. First operand 42 states and 73 transitions. Second operand 3 states. [2020-08-21 21:22:46,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:46,710 INFO L93 Difference]: Finished difference Result 97 states and 172 transitions. [2020-08-21 21:22:46,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:46,711 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-21 21:22:46,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:46,712 INFO L225 Difference]: With dead ends: 97 [2020-08-21 21:22:46,713 INFO L226 Difference]: Without dead ends: 60 [2020-08-21 21:22:46,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:46,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-21 21:22:46,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2020-08-21 21:22:46,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-08-21 21:22:46,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 101 transitions. [2020-08-21 21:22:46,726 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 101 transitions. Word has length 18 [2020-08-21 21:22:46,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:46,726 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 101 transitions. [2020-08-21 21:22:46,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:46,727 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 101 transitions. [2020-08-21 21:22:46,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 21:22:46,728 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:46,728 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:46,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 21:22:46,729 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:46,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:46,730 INFO L82 PathProgramCache]: Analyzing trace with hash 721034227, now seen corresponding path program 1 times [2020-08-21 21:22:46,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:46,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885874573] [2020-08-21 21:22:46,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:46,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:46,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:46,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:46,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:46,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885874573] [2020-08-21 21:22:46,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:46,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:46,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461022371] [2020-08-21 21:22:46,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:46,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:46,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:46,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:46,787 INFO L87 Difference]: Start difference. First operand 58 states and 101 transitions. Second operand 3 states. [2020-08-21 21:22:46,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:46,810 INFO L93 Difference]: Finished difference Result 90 states and 153 transitions. [2020-08-21 21:22:46,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:46,811 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 21:22:46,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:46,813 INFO L225 Difference]: With dead ends: 90 [2020-08-21 21:22:46,813 INFO L226 Difference]: Without dead ends: 63 [2020-08-21 21:22:46,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:46,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-21 21:22:46,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2020-08-21 21:22:46,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-21 21:22:46,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 103 transitions. [2020-08-21 21:22:46,825 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 103 transitions. Word has length 19 [2020-08-21 21:22:46,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:46,826 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 103 transitions. [2020-08-21 21:22:46,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:46,826 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 103 transitions. [2020-08-21 21:22:46,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 21:22:46,827 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:46,828 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:46,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 21:22:46,828 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:46,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:46,829 INFO L82 PathProgramCache]: Analyzing trace with hash 979199665, now seen corresponding path program 1 times [2020-08-21 21:22:46,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:46,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [483103007] [2020-08-21 21:22:46,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:46,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:46,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:46,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:46,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:46,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [483103007] [2020-08-21 21:22:46,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:46,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:46,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410098111] [2020-08-21 21:22:46,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:46,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:46,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:46,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:46,906 INFO L87 Difference]: Start difference. First operand 61 states and 103 transitions. Second operand 3 states. [2020-08-21 21:22:46,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:46,927 INFO L93 Difference]: Finished difference Result 112 states and 192 transitions. [2020-08-21 21:22:46,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:46,928 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 21:22:46,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:46,929 INFO L225 Difference]: With dead ends: 112 [2020-08-21 21:22:46,930 INFO L226 Difference]: Without dead ends: 110 [2020-08-21 21:22:46,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:46,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-08-21 21:22:46,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 80. [2020-08-21 21:22:46,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-08-21 21:22:46,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 136 transitions. [2020-08-21 21:22:46,945 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 136 transitions. Word has length 19 [2020-08-21 21:22:46,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:46,945 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 136 transitions. [2020-08-21 21:22:46,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:46,946 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 136 transitions. [2020-08-21 21:22:46,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 21:22:46,947 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:46,947 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:46,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 21:22:46,948 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:46,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:46,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1680264243, now seen corresponding path program 1 times [2020-08-21 21:22:46,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:46,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [123443488] [2020-08-21 21:22:46,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:46,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:46,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:46,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:46,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:46,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [123443488] [2020-08-21 21:22:46,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:46,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:46,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399801494] [2020-08-21 21:22:46,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:46,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:46,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:46,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:46,993 INFO L87 Difference]: Start difference. First operand 80 states and 136 transitions. Second operand 3 states. [2020-08-21 21:22:47,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:47,018 INFO L93 Difference]: Finished difference Result 184 states and 318 transitions. [2020-08-21 21:22:47,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:47,019 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 21:22:47,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:47,021 INFO L225 Difference]: With dead ends: 184 [2020-08-21 21:22:47,021 INFO L226 Difference]: Without dead ends: 112 [2020-08-21 21:22:47,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:47,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-08-21 21:22:47,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2020-08-21 21:22:47,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-08-21 21:22:47,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 186 transitions. [2020-08-21 21:22:47,036 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 186 transitions. Word has length 19 [2020-08-21 21:22:47,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:47,037 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 186 transitions. [2020-08-21 21:22:47,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:47,037 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 186 transitions. [2020-08-21 21:22:47,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 21:22:47,038 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:47,042 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] [2020-08-21 21:22:47,042 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 21:22:47,042 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:47,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:47,043 INFO L82 PathProgramCache]: Analyzing trace with hash 290632912, now seen corresponding path program 1 times [2020-08-21 21:22:47,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:47,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [948493074] [2020-08-21 21:22:47,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:47,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:47,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:47,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:47,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:47,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [948493074] [2020-08-21 21:22:47,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:47,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:47,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146720525] [2020-08-21 21:22:47,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:47,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:47,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:47,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:47,080 INFO L87 Difference]: Start difference. First operand 110 states and 186 transitions. Second operand 3 states. [2020-08-21 21:22:47,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:47,100 INFO L93 Difference]: Finished difference Result 165 states and 277 transitions. [2020-08-21 21:22:47,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:47,101 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 21:22:47,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:47,103 INFO L225 Difference]: With dead ends: 165 [2020-08-21 21:22:47,103 INFO L226 Difference]: Without dead ends: 114 [2020-08-21 21:22:47,104 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:47,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-08-21 21:22:47,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2020-08-21 21:22:47,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-08-21 21:22:47,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 186 transitions. [2020-08-21 21:22:47,117 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 186 transitions. Word has length 20 [2020-08-21 21:22:47,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:47,118 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 186 transitions. [2020-08-21 21:22:47,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:47,118 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 186 transitions. [2020-08-21 21:22:47,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 21:22:47,119 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:47,120 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] [2020-08-21 21:22:47,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 21:22:47,120 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:47,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:47,121 INFO L82 PathProgramCache]: Analyzing trace with hash 548798350, now seen corresponding path program 1 times [2020-08-21 21:22:47,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:47,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1539803652] [2020-08-21 21:22:47,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:47,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:47,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:47,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:47,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:47,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1539803652] [2020-08-21 21:22:47,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:47,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:47,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326440703] [2020-08-21 21:22:47,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:47,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:47,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:47,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:47,158 INFO L87 Difference]: Start difference. First operand 112 states and 186 transitions. Second operand 3 states. [2020-08-21 21:22:47,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:47,209 INFO L93 Difference]: Finished difference Result 204 states and 344 transitions. [2020-08-21 21:22:47,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:47,215 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 21:22:47,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:47,217 INFO L225 Difference]: With dead ends: 204 [2020-08-21 21:22:47,217 INFO L226 Difference]: Without dead ends: 202 [2020-08-21 21:22:47,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:47,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-08-21 21:22:47,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 152. [2020-08-21 21:22:47,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-08-21 21:22:47,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 250 transitions. [2020-08-21 21:22:47,234 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 250 transitions. Word has length 20 [2020-08-21 21:22:47,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:47,235 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 250 transitions. [2020-08-21 21:22:47,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:47,235 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 250 transitions. [2020-08-21 21:22:47,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 21:22:47,236 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:47,237 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] [2020-08-21 21:22:47,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 21:22:47,237 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:47,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:47,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1249862928, now seen corresponding path program 1 times [2020-08-21 21:22:47,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:47,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1121763097] [2020-08-21 21:22:47,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:47,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:47,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:47,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:47,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:47,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1121763097] [2020-08-21 21:22:47,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:47,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:47,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860053424] [2020-08-21 21:22:47,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:47,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:47,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:47,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:47,272 INFO L87 Difference]: Start difference. First operand 152 states and 250 transitions. Second operand 3 states. [2020-08-21 21:22:47,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:47,292 INFO L93 Difference]: Finished difference Result 352 states and 584 transitions. [2020-08-21 21:22:47,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:47,293 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 21:22:47,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:47,295 INFO L225 Difference]: With dead ends: 352 [2020-08-21 21:22:47,295 INFO L226 Difference]: Without dead ends: 210 [2020-08-21 21:22:47,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:47,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-08-21 21:22:47,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 208. [2020-08-21 21:22:47,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-08-21 21:22:47,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 338 transitions. [2020-08-21 21:22:47,313 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 338 transitions. Word has length 20 [2020-08-21 21:22:47,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:47,313 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 338 transitions. [2020-08-21 21:22:47,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:47,313 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 338 transitions. [2020-08-21 21:22:47,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 21:22:47,315 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:47,315 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:47,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 21:22:47,316 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:47,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:47,316 INFO L82 PathProgramCache]: Analyzing trace with hash -166905624, now seen corresponding path program 1 times [2020-08-21 21:22:47,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:47,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1180717546] [2020-08-21 21:22:47,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:47,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:47,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:47,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:47,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:47,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1180717546] [2020-08-21 21:22:47,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:47,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:47,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502879987] [2020-08-21 21:22:47,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:47,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:47,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:47,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:47,351 INFO L87 Difference]: Start difference. First operand 208 states and 338 transitions. Second operand 3 states. [2020-08-21 21:22:47,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:47,372 INFO L93 Difference]: Finished difference Result 312 states and 504 transitions. [2020-08-21 21:22:47,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:47,373 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 21:22:47,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:47,374 INFO L225 Difference]: With dead ends: 312 [2020-08-21 21:22:47,375 INFO L226 Difference]: Without dead ends: 214 [2020-08-21 21:22:47,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:47,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-08-21 21:22:47,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2020-08-21 21:22:47,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-08-21 21:22:47,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 338 transitions. [2020-08-21 21:22:47,394 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 338 transitions. Word has length 21 [2020-08-21 21:22:47,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:47,395 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 338 transitions. [2020-08-21 21:22:47,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:47,395 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 338 transitions. [2020-08-21 21:22:47,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 21:22:47,400 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:47,400 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:47,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 21:22:47,401 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:47,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:47,401 INFO L82 PathProgramCache]: Analyzing trace with hash 91259814, now seen corresponding path program 1 times [2020-08-21 21:22:47,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:47,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587151653] [2020-08-21 21:22:47,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:47,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:47,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:47,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:47,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:47,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587151653] [2020-08-21 21:22:47,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:47,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:47,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592524512] [2020-08-21 21:22:47,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:47,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:47,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:47,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:47,436 INFO L87 Difference]: Start difference. First operand 212 states and 338 transitions. Second operand 3 states. [2020-08-21 21:22:47,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:47,475 INFO L93 Difference]: Finished difference Result 380 states and 616 transitions. [2020-08-21 21:22:47,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:47,476 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 21:22:47,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:47,478 INFO L225 Difference]: With dead ends: 380 [2020-08-21 21:22:47,478 INFO L226 Difference]: Without dead ends: 378 [2020-08-21 21:22:47,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:47,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2020-08-21 21:22:47,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 296. [2020-08-21 21:22:47,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-08-21 21:22:47,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 462 transitions. [2020-08-21 21:22:47,502 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 462 transitions. Word has length 21 [2020-08-21 21:22:47,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:47,503 INFO L479 AbstractCegarLoop]: Abstraction has 296 states and 462 transitions. [2020-08-21 21:22:47,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:47,503 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 462 transitions. [2020-08-21 21:22:47,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 21:22:47,505 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:47,506 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:47,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 21:22:47,506 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:47,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:47,506 INFO L82 PathProgramCache]: Analyzing trace with hash 792324392, now seen corresponding path program 1 times [2020-08-21 21:22:47,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:47,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [394486008] [2020-08-21 21:22:47,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:47,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:47,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:47,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:47,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:47,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [394486008] [2020-08-21 21:22:47,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:47,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:47,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669168938] [2020-08-21 21:22:47,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:47,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:47,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:47,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:47,537 INFO L87 Difference]: Start difference. First operand 296 states and 462 transitions. Second operand 3 states. [2020-08-21 21:22:47,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:47,566 INFO L93 Difference]: Finished difference Result 684 states and 1072 transitions. [2020-08-21 21:22:47,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:47,566 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 21:22:47,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:47,569 INFO L225 Difference]: With dead ends: 684 [2020-08-21 21:22:47,569 INFO L226 Difference]: Without dead ends: 402 [2020-08-21 21:22:47,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:47,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-08-21 21:22:47,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 400. [2020-08-21 21:22:47,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2020-08-21 21:22:47,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 614 transitions. [2020-08-21 21:22:47,587 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 614 transitions. Word has length 21 [2020-08-21 21:22:47,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:47,588 INFO L479 AbstractCegarLoop]: Abstraction has 400 states and 614 transitions. [2020-08-21 21:22:47,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:47,588 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 614 transitions. [2020-08-21 21:22:47,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 21:22:47,590 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:47,590 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:47,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 21:22:47,590 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:47,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:47,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1465698011, now seen corresponding path program 1 times [2020-08-21 21:22:47,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:47,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773568497] [2020-08-21 21:22:47,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:47,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:47,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:47,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:47,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:47,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773568497] [2020-08-21 21:22:47,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:47,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:47,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891210882] [2020-08-21 21:22:47,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:47,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:47,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:47,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:47,616 INFO L87 Difference]: Start difference. First operand 400 states and 614 transitions. Second operand 3 states. [2020-08-21 21:22:47,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:47,636 INFO L93 Difference]: Finished difference Result 600 states and 916 transitions. [2020-08-21 21:22:47,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:47,637 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 21:22:47,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:47,639 INFO L225 Difference]: With dead ends: 600 [2020-08-21 21:22:47,640 INFO L226 Difference]: Without dead ends: 410 [2020-08-21 21:22:47,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:47,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-08-21 21:22:47,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 408. [2020-08-21 21:22:47,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 408 states. [2020-08-21 21:22:47,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 614 transitions. [2020-08-21 21:22:47,656 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 614 transitions. Word has length 22 [2020-08-21 21:22:47,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:47,657 INFO L479 AbstractCegarLoop]: Abstraction has 408 states and 614 transitions. [2020-08-21 21:22:47,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:47,657 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 614 transitions. [2020-08-21 21:22:47,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 21:22:47,659 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:47,659 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:47,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 21:22:47,659 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:47,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:47,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1207532573, now seen corresponding path program 1 times [2020-08-21 21:22:47,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:47,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1376029843] [2020-08-21 21:22:47,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:47,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:47,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:47,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:47,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:47,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1376029843] [2020-08-21 21:22:47,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:47,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:47,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848742314] [2020-08-21 21:22:47,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:47,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:47,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:47,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:47,688 INFO L87 Difference]: Start difference. First operand 408 states and 614 transitions. Second operand 3 states. [2020-08-21 21:22:47,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:47,711 INFO L93 Difference]: Finished difference Result 716 states and 1096 transitions. [2020-08-21 21:22:47,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:47,712 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 21:22:47,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:47,716 INFO L225 Difference]: With dead ends: 716 [2020-08-21 21:22:47,716 INFO L226 Difference]: Without dead ends: 714 [2020-08-21 21:22:47,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:47,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2020-08-21 21:22:47,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 584. [2020-08-21 21:22:47,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2020-08-21 21:22:47,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 854 transitions. [2020-08-21 21:22:47,739 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 854 transitions. Word has length 22 [2020-08-21 21:22:47,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:47,740 INFO L479 AbstractCegarLoop]: Abstraction has 584 states and 854 transitions. [2020-08-21 21:22:47,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:47,740 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 854 transitions. [2020-08-21 21:22:47,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 21:22:47,742 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:47,742 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:47,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 21:22:47,743 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:47,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:47,743 INFO L82 PathProgramCache]: Analyzing trace with hash -506467995, now seen corresponding path program 1 times [2020-08-21 21:22:47,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:47,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [752224234] [2020-08-21 21:22:47,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:47,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:47,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:47,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:47,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:47,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [752224234] [2020-08-21 21:22:47,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:47,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:47,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502097538] [2020-08-21 21:22:47,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:47,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:47,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:47,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:47,768 INFO L87 Difference]: Start difference. First operand 584 states and 854 transitions. Second operand 3 states. [2020-08-21 21:22:47,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:47,798 INFO L93 Difference]: Finished difference Result 1340 states and 1960 transitions. [2020-08-21 21:22:47,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:47,799 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 21:22:47,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:47,803 INFO L225 Difference]: With dead ends: 1340 [2020-08-21 21:22:47,803 INFO L226 Difference]: Without dead ends: 778 [2020-08-21 21:22:47,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:47,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2020-08-21 21:22:47,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 776. [2020-08-21 21:22:47,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-08-21 21:22:47,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1110 transitions. [2020-08-21 21:22:47,831 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1110 transitions. Word has length 22 [2020-08-21 21:22:47,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:47,832 INFO L479 AbstractCegarLoop]: Abstraction has 776 states and 1110 transitions. [2020-08-21 21:22:47,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:47,832 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1110 transitions. [2020-08-21 21:22:47,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 21:22:47,834 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:47,834 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:47,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 21:22:47,835 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:47,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:47,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1221411293, now seen corresponding path program 1 times [2020-08-21 21:22:47,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:47,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78823325] [2020-08-21 21:22:47,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:47,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:47,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:47,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:47,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:47,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [78823325] [2020-08-21 21:22:47,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:47,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:47,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458878674] [2020-08-21 21:22:47,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:47,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:47,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:47,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:47,863 INFO L87 Difference]: Start difference. First operand 776 states and 1110 transitions. Second operand 3 states. [2020-08-21 21:22:47,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:47,897 INFO L93 Difference]: Finished difference Result 1164 states and 1656 transitions. [2020-08-21 21:22:47,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:47,898 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 21:22:47,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:47,903 INFO L225 Difference]: With dead ends: 1164 [2020-08-21 21:22:47,903 INFO L226 Difference]: Without dead ends: 794 [2020-08-21 21:22:47,906 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:47,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2020-08-21 21:22:47,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 792. [2020-08-21 21:22:47,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 792 states. [2020-08-21 21:22:47,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1110 transitions. [2020-08-21 21:22:47,937 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1110 transitions. Word has length 23 [2020-08-21 21:22:47,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:47,937 INFO L479 AbstractCegarLoop]: Abstraction has 792 states and 1110 transitions. [2020-08-21 21:22:47,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:47,938 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1110 transitions. [2020-08-21 21:22:47,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 21:22:47,940 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:47,940 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:47,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 21:22:47,940 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:47,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:47,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1479576731, now seen corresponding path program 1 times [2020-08-21 21:22:47,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:47,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1423232509] [2020-08-21 21:22:47,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:47,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:47,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:47,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:47,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:47,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1423232509] [2020-08-21 21:22:47,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:47,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:47,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829329441] [2020-08-21 21:22:47,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:47,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:47,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:47,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:47,993 INFO L87 Difference]: Start difference. First operand 792 states and 1110 transitions. Second operand 3 states. [2020-08-21 21:22:48,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:48,045 INFO L93 Difference]: Finished difference Result 1356 states and 1928 transitions. [2020-08-21 21:22:48,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:48,045 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 21:22:48,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:48,052 INFO L225 Difference]: With dead ends: 1356 [2020-08-21 21:22:48,052 INFO L226 Difference]: Without dead ends: 1354 [2020-08-21 21:22:48,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:48,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2020-08-21 21:22:48,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1160. [2020-08-21 21:22:48,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1160 states. [2020-08-21 21:22:48,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1574 transitions. [2020-08-21 21:22:48,090 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1574 transitions. Word has length 23 [2020-08-21 21:22:48,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:48,091 INFO L479 AbstractCegarLoop]: Abstraction has 1160 states and 1574 transitions. [2020-08-21 21:22:48,091 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:48,091 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1574 transitions. [2020-08-21 21:22:48,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 21:22:48,094 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:48,094 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:48,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 21:22:48,094 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:48,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:48,095 INFO L82 PathProgramCache]: Analyzing trace with hash -2114325987, now seen corresponding path program 1 times [2020-08-21 21:22:48,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:48,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2143652571] [2020-08-21 21:22:48,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:48,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:48,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:48,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:48,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:48,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2143652571] [2020-08-21 21:22:48,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:48,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:48,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387093226] [2020-08-21 21:22:48,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:48,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:48,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:48,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:48,121 INFO L87 Difference]: Start difference. First operand 1160 states and 1574 transitions. Second operand 3 states. [2020-08-21 21:22:48,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:48,165 INFO L93 Difference]: Finished difference Result 2636 states and 3560 transitions. [2020-08-21 21:22:48,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:48,166 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 21:22:48,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:48,173 INFO L225 Difference]: With dead ends: 2636 [2020-08-21 21:22:48,174 INFO L226 Difference]: Without dead ends: 1514 [2020-08-21 21:22:48,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:48,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2020-08-21 21:22:48,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 1512. [2020-08-21 21:22:48,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1512 states. [2020-08-21 21:22:48,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 1990 transitions. [2020-08-21 21:22:48,225 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 1990 transitions. Word has length 23 [2020-08-21 21:22:48,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:48,226 INFO L479 AbstractCegarLoop]: Abstraction has 1512 states and 1990 transitions. [2020-08-21 21:22:48,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:48,226 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 1990 transitions. [2020-08-21 21:22:48,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 21:22:48,229 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:48,229 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:48,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 21:22:48,229 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:48,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:48,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1377545862, now seen corresponding path program 1 times [2020-08-21 21:22:48,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:48,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [497626336] [2020-08-21 21:22:48,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:48,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:48,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:48,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:48,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:48,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [497626336] [2020-08-21 21:22:48,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:48,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:48,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999693136] [2020-08-21 21:22:48,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:48,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:48,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:48,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:48,251 INFO L87 Difference]: Start difference. First operand 1512 states and 1990 transitions. Second operand 3 states. [2020-08-21 21:22:48,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:48,291 INFO L93 Difference]: Finished difference Result 2268 states and 2968 transitions. [2020-08-21 21:22:48,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:48,292 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 21:22:48,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:48,299 INFO L225 Difference]: With dead ends: 2268 [2020-08-21 21:22:48,299 INFO L226 Difference]: Without dead ends: 1546 [2020-08-21 21:22:48,301 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:48,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2020-08-21 21:22:48,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1544. [2020-08-21 21:22:48,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1544 states. [2020-08-21 21:22:48,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 1990 transitions. [2020-08-21 21:22:48,353 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 1990 transitions. Word has length 24 [2020-08-21 21:22:48,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:48,354 INFO L479 AbstractCegarLoop]: Abstraction has 1544 states and 1990 transitions. [2020-08-21 21:22:48,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:48,354 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 1990 transitions. [2020-08-21 21:22:48,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 21:22:48,357 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:48,357 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:48,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 21:22:48,358 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:48,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:48,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1119380424, now seen corresponding path program 1 times [2020-08-21 21:22:48,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:48,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1202451092] [2020-08-21 21:22:48,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:48,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:48,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:48,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:48,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:48,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1202451092] [2020-08-21 21:22:48,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:48,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:48,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765854706] [2020-08-21 21:22:48,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:48,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:48,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:48,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:48,391 INFO L87 Difference]: Start difference. First operand 1544 states and 1990 transitions. Second operand 3 states. [2020-08-21 21:22:48,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:48,463 INFO L93 Difference]: Finished difference Result 2572 states and 3336 transitions. [2020-08-21 21:22:48,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:48,464 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 21:22:48,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:48,480 INFO L225 Difference]: With dead ends: 2572 [2020-08-21 21:22:48,481 INFO L226 Difference]: Without dead ends: 2570 [2020-08-21 21:22:48,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:48,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2570 states. [2020-08-21 21:22:48,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2570 to 2312. [2020-08-21 21:22:48,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2312 states. [2020-08-21 21:22:48,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2312 states to 2312 states and 2886 transitions. [2020-08-21 21:22:48,636 INFO L78 Accepts]: Start accepts. Automaton has 2312 states and 2886 transitions. Word has length 24 [2020-08-21 21:22:48,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:48,637 INFO L479 AbstractCegarLoop]: Abstraction has 2312 states and 2886 transitions. [2020-08-21 21:22:48,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:48,637 INFO L276 IsEmpty]: Start isEmpty. Operand 2312 states and 2886 transitions. [2020-08-21 21:22:48,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 21:22:48,642 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:48,642 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:48,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 21:22:48,642 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:48,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:48,643 INFO L82 PathProgramCache]: Analyzing trace with hash -418315846, now seen corresponding path program 1 times [2020-08-21 21:22:48,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:48,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [386676845] [2020-08-21 21:22:48,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:48,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:48,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:48,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:48,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:48,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [386676845] [2020-08-21 21:22:48,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:48,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:48,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332462642] [2020-08-21 21:22:48,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:48,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:48,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:48,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:48,681 INFO L87 Difference]: Start difference. First operand 2312 states and 2886 transitions. Second operand 3 states. [2020-08-21 21:22:48,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:48,803 INFO L93 Difference]: Finished difference Result 5196 states and 6408 transitions. [2020-08-21 21:22:48,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:48,803 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 21:22:48,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:48,817 INFO L225 Difference]: With dead ends: 5196 [2020-08-21 21:22:48,817 INFO L226 Difference]: Without dead ends: 2954 [2020-08-21 21:22:48,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:48,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2020-08-21 21:22:48,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2952. [2020-08-21 21:22:48,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2952 states. [2020-08-21 21:22:48,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2952 states to 2952 states and 3526 transitions. [2020-08-21 21:22:48,928 INFO L78 Accepts]: Start accepts. Automaton has 2952 states and 3526 transitions. Word has length 24 [2020-08-21 21:22:48,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:48,928 INFO L479 AbstractCegarLoop]: Abstraction has 2952 states and 3526 transitions. [2020-08-21 21:22:48,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:48,928 INFO L276 IsEmpty]: Start isEmpty. Operand 2952 states and 3526 transitions. [2020-08-21 21:22:48,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 21:22:48,933 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:48,933 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:48,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 21:22:48,936 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:48,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:48,936 INFO L82 PathProgramCache]: Analyzing trace with hash -340838702, now seen corresponding path program 1 times [2020-08-21 21:22:48,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:48,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [408344933] [2020-08-21 21:22:48,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:48,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:48,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:48,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:48,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:48,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [408344933] [2020-08-21 21:22:48,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:48,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:48,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198819401] [2020-08-21 21:22:48,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:48,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:48,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:48,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:48,969 INFO L87 Difference]: Start difference. First operand 2952 states and 3526 transitions. Second operand 3 states. [2020-08-21 21:22:49,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:49,034 INFO L93 Difference]: Finished difference Result 4428 states and 5256 transitions. [2020-08-21 21:22:49,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:49,035 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 21:22:49,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:49,048 INFO L225 Difference]: With dead ends: 4428 [2020-08-21 21:22:49,049 INFO L226 Difference]: Without dead ends: 3018 [2020-08-21 21:22:49,052 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:49,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3018 states. [2020-08-21 21:22:49,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3018 to 3016. [2020-08-21 21:22:49,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3016 states. [2020-08-21 21:22:49,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 3526 transitions. [2020-08-21 21:22:49,153 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 3526 transitions. Word has length 25 [2020-08-21 21:22:49,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:49,154 INFO L479 AbstractCegarLoop]: Abstraction has 3016 states and 3526 transitions. [2020-08-21 21:22:49,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:49,154 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 3526 transitions. [2020-08-21 21:22:49,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 21:22:49,190 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:49,190 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:49,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 21:22:49,190 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:49,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:49,190 INFO L82 PathProgramCache]: Analyzing trace with hash -82673264, now seen corresponding path program 1 times [2020-08-21 21:22:49,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:49,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1948210830] [2020-08-21 21:22:49,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:49,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:49,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:49,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:49,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:49,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1948210830] [2020-08-21 21:22:49,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:49,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:49,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826944463] [2020-08-21 21:22:49,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:49,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:49,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:49,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:49,214 INFO L87 Difference]: Start difference. First operand 3016 states and 3526 transitions. Second operand 3 states. [2020-08-21 21:22:49,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:49,319 INFO L93 Difference]: Finished difference Result 8650 states and 9799 transitions. [2020-08-21 21:22:49,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:49,320 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 21:22:49,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:49,335 INFO L225 Difference]: With dead ends: 8650 [2020-08-21 21:22:49,335 INFO L226 Difference]: Without dead ends: 3016 [2020-08-21 21:22:49,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:49,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3016 states. [2020-08-21 21:22:49,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3016 to 3016. [2020-08-21 21:22:49,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3016 states. [2020-08-21 21:22:49,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 3270 transitions. [2020-08-21 21:22:49,456 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 3270 transitions. Word has length 25 [2020-08-21 21:22:49,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:49,457 INFO L479 AbstractCegarLoop]: Abstraction has 3016 states and 3270 transitions. [2020-08-21 21:22:49,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:49,457 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 3270 transitions. [2020-08-21 21:22:49,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 21:22:49,462 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:49,462 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:22:49,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-21 21:22:49,463 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:49,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:49,463 INFO L82 PathProgramCache]: Analyzing trace with hash -783737842, now seen corresponding path program 1 times [2020-08-21 21:22:49,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:49,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [195590470] [2020-08-21 21:22:49,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:49,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:49,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:49,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:49,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:49,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [195590470] [2020-08-21 21:22:49,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:49,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:49,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520574154] [2020-08-21 21:22:49,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:49,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:49,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:49,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:49,486 INFO L87 Difference]: Start difference. First operand 3016 states and 3270 transitions. Second operand 3 states. [2020-08-21 21:22:49,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:49,531 INFO L93 Difference]: Finished difference Result 3016 states and 3270 transitions. [2020-08-21 21:22:49,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:49,532 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 21:22:49,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:49,532 INFO L225 Difference]: With dead ends: 3016 [2020-08-21 21:22:49,532 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 21:22:49,537 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:49,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 21:22:49,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 21:22:49,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 21:22:49,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 21:22:49,538 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2020-08-21 21:22:49,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:49,538 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 21:22:49,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:49,539 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 21:22:49,539 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 21:22:49,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-21 21:22:49,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 21:22:49,562 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 21:22:49,562 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 21:22:49,562 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 21:22:49,562 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 21:22:49,562 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 21:22:49,563 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 21:22:49,563 INFO L268 CegarLoopResult]: For program point L126(line 126) no Hoare annotation was computed. [2020-08-21 21:22:49,563 INFO L264 CegarLoopResult]: At program point L126-1(lines 5 135) the Hoare annotation is: false [2020-08-21 21:22:49,563 INFO L268 CegarLoopResult]: For program point L60-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 21:22:49,563 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 135) no Hoare annotation was computed. [2020-08-21 21:22:49,563 INFO L268 CegarLoopResult]: For program point L110-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 21:22:49,563 INFO L268 CegarLoopResult]: For program point L111(line 111) no Hoare annotation was computed. [2020-08-21 21:22:49,563 INFO L268 CegarLoopResult]: For program point L95-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 21:22:49,564 INFO L268 CegarLoopResult]: For program point L120-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 21:22:49,564 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 135) no Hoare annotation was computed. [2020-08-21 21:22:49,564 INFO L268 CegarLoopResult]: For program point L96(line 96) no Hoare annotation was computed. [2020-08-21 21:22:49,564 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 133) no Hoare annotation was computed. [2020-08-21 21:22:49,564 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 135) the Hoare annotation is: true [2020-08-21 21:22:49,564 INFO L268 CegarLoopResult]: For program point L121(line 121) no Hoare annotation was computed. [2020-08-21 21:22:49,564 INFO L268 CegarLoopResult]: For program point L80-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 21:22:49,564 INFO L268 CegarLoopResult]: For program point L105-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 21:22:49,565 INFO L268 CegarLoopResult]: For program point L72-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 21:22:49,565 INFO L268 CegarLoopResult]: For program point L64-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 21:22:49,565 INFO L268 CegarLoopResult]: For program point L56(lines 56 58) no Hoare annotation was computed. [2020-08-21 21:22:49,565 INFO L268 CegarLoopResult]: For program point L56-2(lines 33 130) no Hoare annotation was computed. [2020-08-21 21:22:49,565 INFO L268 CegarLoopResult]: For program point L106(line 106) no Hoare annotation was computed. [2020-08-21 21:22:49,565 INFO L271 CegarLoopResult]: At program point L131(lines 5 135) the Hoare annotation is: true [2020-08-21 21:22:49,565 INFO L268 CegarLoopResult]: For program point L90-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 21:22:49,565 INFO L268 CegarLoopResult]: For program point L115-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 21:22:49,565 INFO L268 CegarLoopResult]: For program point L91(line 91) no Hoare annotation was computed. [2020-08-21 21:22:49,566 INFO L268 CegarLoopResult]: For program point L116(line 116) no Hoare annotation was computed. [2020-08-21 21:22:49,566 INFO L268 CegarLoopResult]: For program point L100-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 21:22:49,566 INFO L271 CegarLoopResult]: At program point L125-1(lines 33 130) the Hoare annotation is: true [2020-08-21 21:22:49,566 INFO L268 CegarLoopResult]: For program point L84-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 21:22:49,566 INFO L268 CegarLoopResult]: For program point L76-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 21:22:49,566 INFO L268 CegarLoopResult]: For program point L101(line 101) no Hoare annotation was computed. [2020-08-21 21:22:49,566 INFO L268 CegarLoopResult]: For program point L35(lines 35 37) no Hoare annotation was computed. [2020-08-21 21:22:49,566 INFO L268 CegarLoopResult]: For program point L68-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 21:22:49,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 09:22:49 BoogieIcfgContainer [2020-08-21 21:22:49,578 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 21:22:49,581 INFO L168 Benchmark]: Toolchain (without parser) took 4297.41 ms. Allocated memory was 147.8 MB in the beginning and 299.4 MB in the end (delta: 151.5 MB). Free memory was 103.5 MB in the beginning and 166.1 MB in the end (delta: -62.6 MB). Peak memory consumption was 88.9 MB. Max. memory is 7.1 GB. [2020-08-21 21:22:49,581 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 147.8 MB. Free memory was 122.4 MB in the beginning and 122.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 21:22:49,582 INFO L168 Benchmark]: CACSL2BoogieTranslator took 298.48 ms. Allocated memory is still 147.8 MB. Free memory was 103.3 MB in the beginning and 92.9 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-08-21 21:22:49,583 INFO L168 Benchmark]: Boogie Preprocessor took 140.07 ms. Allocated memory was 147.8 MB in the beginning and 203.9 MB in the end (delta: 56.1 MB). Free memory was 92.9 MB in the beginning and 181.7 MB in the end (delta: -88.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-08-21 21:22:49,583 INFO L168 Benchmark]: RCFGBuilder took 366.41 ms. Allocated memory is still 203.9 MB. Free memory was 181.0 MB in the beginning and 163.6 MB in the end (delta: 17.4 MB). Peak memory consumption was 17.4 MB. Max. memory is 7.1 GB. [2020-08-21 21:22:49,584 INFO L168 Benchmark]: TraceAbstraction took 3487.59 ms. Allocated memory was 203.9 MB in the beginning and 299.4 MB in the end (delta: 95.4 MB). Free memory was 163.6 MB in the beginning and 166.1 MB in the end (delta: -2.5 MB). Peak memory consumption was 92.9 MB. Max. memory is 7.1 GB. [2020-08-21 21:22:49,586 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 147.8 MB. Free memory was 122.4 MB in the beginning and 122.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 298.48 ms. Allocated memory is still 147.8 MB. Free memory was 103.3 MB in the beginning and 92.9 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 140.07 ms. Allocated memory was 147.8 MB in the beginning and 203.9 MB in the end (delta: 56.1 MB). Free memory was 92.9 MB in the beginning and 181.7 MB in the end (delta: -88.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 366.41 ms. Allocated memory is still 203.9 MB. Free memory was 181.0 MB in the beginning and 163.6 MB in the end (delta: 17.4 MB). Peak memory consumption was 17.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3487.59 ms. Allocated memory was 203.9 MB in the beginning and 299.4 MB in the end (delta: 95.4 MB). Free memory was 163.6 MB in the beginning and 166.1 MB in the end (delta: -2.5 MB). Peak memory consumption was 92.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 133]: 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: 33]: 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, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.3s, OverallIterations: 23, TraceHistogramMax: 1, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1573 SDtfs, 755 SDslu, 1056 SDs, 0 SdLazy, 121 SolverSat, 23 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 115 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3016occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 23 MinimizatonAttempts, 790 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 266 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 498 NumberOfCodeBlocks, 498 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 475 ConstructedInterpolants, 0 QuantifiedInterpolants, 19027 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 23 InterpolantComputations, 23 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...