/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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_9.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 00:36:35,977 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-22 00:36:36,044 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 00:36:36,047 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 00:36:36,049 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 00:36:36,051 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 00:36:36,053 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 00:36:36,054 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 00:36:36,055 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 00:36:36,063 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 00:36:36,065 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 00:36:36,066 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 00:36:36,067 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 00:36:36,068 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 00:36:36,085 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 00:36:36,098 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 00:36:36,099 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 00:36:36,100 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 00:36:36,101 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 [2020-08-22 00:36:36,138 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 00:36:36,138 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 00:36:36,141 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 00:36:36,141 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 00:36:36,141 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 00:36:36,141 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 00:36:36,144 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 00:36:36,144 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 00:36:36,144 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 00:36:36,144 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 00:36:36,144 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 00:36:36,144 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 00:36:36,145 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 00:36:36,145 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 00:36:36,145 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 00:36:36,145 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 00:36:36,145 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 00:36:36,146 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 00:36:36,146 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 00:36:36,146 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 00:36:36,146 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 00:36:36,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 00:36:36,146 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 00:36:36,146 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 00:36:36,147 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 00:36:36,147 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 00:36:36,147 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 00:36:36,147 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 00:36:36,147 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 00:36:36,147 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=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; [2020-08-22 00:36:36,468 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 00:36:36,480 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 00:36:36,483 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 00:36:36,485 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 00:36:36,485 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 00:36:36,486 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_9.c [2020-08-22 00:36:36,547 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/93ef21e45/9b0c227070d54698bf92b8aed6dad334/FLAG906922ad1 [2020-08-22 00:36:37,006 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 00:36:37,007 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_9.c [2020-08-22 00:36:37,016 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/93ef21e45/9b0c227070d54698bf92b8aed6dad334/FLAG906922ad1 [2020-08-22 00:36:37,397 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/93ef21e45/9b0c227070d54698bf92b8aed6dad334 [2020-08-22 00:36:37,404 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 00:36:37,406 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 00:36:37,407 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 00:36:37,407 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 00:36:37,410 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 00:36:37,411 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 12:36:37" (1/1) ... [2020-08-22 00:36:37,414 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@729581a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:36:37, skipping insertion in model container [2020-08-22 00:36:37,415 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 12:36:37" (1/1) ... [2020-08-22 00:36:37,422 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 00:36:37,451 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 00:36:37,639 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 00:36:37,643 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 00:36:37,670 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 00:36:37,685 INFO L208 MainTranslator]: Completed translation [2020-08-22 00:36:37,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:36:37 WrapperNode [2020-08-22 00:36:37,686 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 00:36:37,687 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 00:36:37,687 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 00:36:37,687 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 00:36:37,781 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:36:37" (1/1) ... [2020-08-22 00:36:37,782 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:36:37" (1/1) ... [2020-08-22 00:36:37,787 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:36:37" (1/1) ... [2020-08-22 00:36:37,788 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:36:37" (1/1) ... [2020-08-22 00:36:37,792 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:36:37" (1/1) ... [2020-08-22 00:36:37,800 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:36:37" (1/1) ... [2020-08-22 00:36:37,801 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:36:37" (1/1) ... [2020-08-22 00:36:37,804 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 00:36:37,804 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 00:36:37,805 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 00:36:37,805 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 00:36:37,806 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:36:37" (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 [2020-08-22 00:36:37,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 00:36:37,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 00:36:37,869 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 00:36:37,869 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 00:36:37,869 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 00:36:37,869 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 00:36:37,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 00:36:37,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 00:36:38,149 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 00:36:38,149 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 00:36:38,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 12:36:38 BoogieIcfgContainer [2020-08-22 00:36:38,154 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 00:36:38,155 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 00:36:38,156 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 00:36:38,161 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 00:36:38,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 12:36:37" (1/3) ... [2020-08-22 00:36:38,162 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f2563fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 12:36:38, skipping insertion in model container [2020-08-22 00:36:38,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:36:37" (2/3) ... [2020-08-22 00:36:38,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f2563fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 12:36:38, skipping insertion in model container [2020-08-22 00:36:38,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 12:36:38" (3/3) ... [2020-08-22 00:36:38,168 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_9.c [2020-08-22 00:36:38,194 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 00:36:38,211 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 00:36:38,248 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 00:36:38,305 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 00:36:38,305 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 00:36:38,305 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 00:36:38,306 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 00:36:38,306 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 00:36:38,306 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 00:36:38,307 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 00:36:38,307 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 00:36:38,326 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-08-22 00:36:38,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 00:36:38,332 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:38,333 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:36:38,334 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:38,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:38,339 INFO L82 PathProgramCache]: Analyzing trace with hash 691982780, now seen corresponding path program 1 times [2020-08-22 00:36:38,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:38,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722509744] [2020-08-22 00:36:38,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:38,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:38,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:38,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:38,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:38,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722509744] [2020-08-22 00:36:38,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:38,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:38,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269654206] [2020-08-22 00:36:38,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:38,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:38,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:38,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:38,573 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 3 states. [2020-08-22 00:36:38,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:38,642 INFO L93 Difference]: Finished difference Result 81 states and 138 transitions. [2020-08-22 00:36:38,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:38,647 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-22 00:36:38,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:38,668 INFO L225 Difference]: With dead ends: 81 [2020-08-22 00:36:38,668 INFO L226 Difference]: Without dead ends: 66 [2020-08-22 00:36:38,676 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:38,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-22 00:36:38,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2020-08-22 00:36:38,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-22 00:36:38,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 81 transitions. [2020-08-22 00:36:38,740 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 81 transitions. Word has length 19 [2020-08-22 00:36:38,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:38,741 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 81 transitions. [2020-08-22 00:36:38,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:38,742 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 81 transitions. [2020-08-22 00:36:38,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 00:36:38,745 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:38,745 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:36:38,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 00:36:38,746 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:38,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:38,746 INFO L82 PathProgramCache]: Analyzing trace with hash 950148218, now seen corresponding path program 1 times [2020-08-22 00:36:38,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:38,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872236520] [2020-08-22 00:36:38,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:38,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:38,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:38,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:38,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:38,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872236520] [2020-08-22 00:36:38,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:38,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:38,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638831768] [2020-08-22 00:36:38,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:38,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:38,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:38,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:38,871 INFO L87 Difference]: Start difference. First operand 46 states and 81 transitions. Second operand 3 states. [2020-08-22 00:36:38,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:38,899 INFO L93 Difference]: Finished difference Result 107 states and 192 transitions. [2020-08-22 00:36:38,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:38,900 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-22 00:36:38,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:38,902 INFO L225 Difference]: With dead ends: 107 [2020-08-22 00:36:38,902 INFO L226 Difference]: Without dead ends: 66 [2020-08-22 00:36:38,904 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 [2020-08-22 00:36:38,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-22 00:36:38,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2020-08-22 00:36:38,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-22 00:36:38,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 113 transitions. [2020-08-22 00:36:38,914 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 113 transitions. Word has length 19 [2020-08-22 00:36:38,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:38,914 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 113 transitions. [2020-08-22 00:36:38,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:38,915 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 113 transitions. [2020-08-22 00:36:38,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 00:36:38,916 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:38,916 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] [2020-08-22 00:36:38,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 00:36:38,917 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:38,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:38,917 INFO L82 PathProgramCache]: Analyzing trace with hash -23156596, now seen corresponding path program 1 times [2020-08-22 00:36:38,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:38,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1193034510] [2020-08-22 00:36:38,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:38,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:38,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:38,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:38,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:38,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1193034510] [2020-08-22 00:36:38,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:38,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:38,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273683886] [2020-08-22 00:36:38,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:38,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:38,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:38,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:38,970 INFO L87 Difference]: Start difference. First operand 64 states and 113 transitions. Second operand 3 states. [2020-08-22 00:36:39,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:39,003 INFO L93 Difference]: Finished difference Result 99 states and 171 transitions. [2020-08-22 00:36:39,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:39,003 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 00:36:39,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:39,005 INFO L225 Difference]: With dead ends: 99 [2020-08-22 00:36:39,005 INFO L226 Difference]: Without dead ends: 69 [2020-08-22 00:36:39,006 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 [2020-08-22 00:36:39,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-22 00:36:39,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2020-08-22 00:36:39,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-22 00:36:39,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 115 transitions. [2020-08-22 00:36:39,016 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 115 transitions. Word has length 20 [2020-08-22 00:36:39,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:39,017 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 115 transitions. [2020-08-22 00:36:39,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:39,017 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 115 transitions. [2020-08-22 00:36:39,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 00:36:39,018 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:39,018 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] [2020-08-22 00:36:39,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 00:36:39,019 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:39,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:39,019 INFO L82 PathProgramCache]: Analyzing trace with hash -609962610, now seen corresponding path program 1 times [2020-08-22 00:36:39,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:39,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792629786] [2020-08-22 00:36:39,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:39,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:39,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:39,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:39,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:39,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792629786] [2020-08-22 00:36:39,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:39,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:39,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849988444] [2020-08-22 00:36:39,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:39,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:39,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:39,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:39,063 INFO L87 Difference]: Start difference. First operand 67 states and 115 transitions. Second operand 3 states. [2020-08-22 00:36:39,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:39,095 INFO L93 Difference]: Finished difference Result 124 states and 216 transitions. [2020-08-22 00:36:39,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:39,096 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 00:36:39,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:39,098 INFO L225 Difference]: With dead ends: 124 [2020-08-22 00:36:39,098 INFO L226 Difference]: Without dead ends: 122 [2020-08-22 00:36:39,099 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 [2020-08-22 00:36:39,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-22 00:36:39,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 88. [2020-08-22 00:36:39,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-22 00:36:39,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 152 transitions. [2020-08-22 00:36:39,111 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 152 transitions. Word has length 20 [2020-08-22 00:36:39,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:39,111 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 152 transitions. [2020-08-22 00:36:39,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:39,112 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 152 transitions. [2020-08-22 00:36:39,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 00:36:39,113 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:39,113 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] [2020-08-22 00:36:39,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 00:36:39,114 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:39,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:39,114 INFO L82 PathProgramCache]: Analyzing trace with hash -351797172, now seen corresponding path program 1 times [2020-08-22 00:36:39,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:39,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1166201803] [2020-08-22 00:36:39,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:39,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:39,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:39,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:39,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:39,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1166201803] [2020-08-22 00:36:39,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:39,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:39,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268000502] [2020-08-22 00:36:39,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:39,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:39,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:39,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:39,155 INFO L87 Difference]: Start difference. First operand 88 states and 152 transitions. Second operand 3 states. [2020-08-22 00:36:39,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:39,177 INFO L93 Difference]: Finished difference Result 204 states and 358 transitions. [2020-08-22 00:36:39,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:39,177 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 00:36:39,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:39,179 INFO L225 Difference]: With dead ends: 204 [2020-08-22 00:36:39,180 INFO L226 Difference]: Without dead ends: 124 [2020-08-22 00:36:39,181 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 [2020-08-22 00:36:39,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-22 00:36:39,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2020-08-22 00:36:39,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-08-22 00:36:39,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 210 transitions. [2020-08-22 00:36:39,195 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 210 transitions. Word has length 20 [2020-08-22 00:36:39,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:39,196 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 210 transitions. [2020-08-22 00:36:39,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:39,196 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 210 transitions. [2020-08-22 00:36:39,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 00:36:39,197 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:39,198 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] [2020-08-22 00:36:39,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 00:36:39,198 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:39,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:39,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1728757681, now seen corresponding path program 1 times [2020-08-22 00:36:39,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:39,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580309994] [2020-08-22 00:36:39,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:39,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:39,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:39,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:39,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:39,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580309994] [2020-08-22 00:36:39,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:39,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:39,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147219045] [2020-08-22 00:36:39,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:39,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:39,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:39,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:39,237 INFO L87 Difference]: Start difference. First operand 122 states and 210 transitions. Second operand 3 states. [2020-08-22 00:36:39,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:39,258 INFO L93 Difference]: Finished difference Result 183 states and 313 transitions. [2020-08-22 00:36:39,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:39,259 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 00:36:39,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:39,261 INFO L225 Difference]: With dead ends: 183 [2020-08-22 00:36:39,261 INFO L226 Difference]: Without dead ends: 126 [2020-08-22 00:36:39,262 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:39,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-08-22 00:36:39,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2020-08-22 00:36:39,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-08-22 00:36:39,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 210 transitions. [2020-08-22 00:36:39,277 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 210 transitions. Word has length 21 [2020-08-22 00:36:39,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:39,277 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 210 transitions. [2020-08-22 00:36:39,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:39,277 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 210 transitions. [2020-08-22 00:36:39,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 00:36:39,279 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:39,279 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] [2020-08-22 00:36:39,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 00:36:39,280 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:39,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:39,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1979403601, now seen corresponding path program 1 times [2020-08-22 00:36:39,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:39,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1586899651] [2020-08-22 00:36:39,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:39,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:39,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:39,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:39,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:39,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1586899651] [2020-08-22 00:36:39,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:39,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:39,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771810417] [2020-08-22 00:36:39,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:39,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:39,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:39,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:39,344 INFO L87 Difference]: Start difference. First operand 124 states and 210 transitions. Second operand 3 states. [2020-08-22 00:36:39,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:39,377 INFO L93 Difference]: Finished difference Result 228 states and 392 transitions. [2020-08-22 00:36:39,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:39,378 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 00:36:39,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:39,382 INFO L225 Difference]: With dead ends: 228 [2020-08-22 00:36:39,382 INFO L226 Difference]: Without dead ends: 226 [2020-08-22 00:36:39,384 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 [2020-08-22 00:36:39,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-08-22 00:36:39,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 168. [2020-08-22 00:36:39,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-22 00:36:39,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 282 transitions. [2020-08-22 00:36:39,401 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 282 transitions. Word has length 21 [2020-08-22 00:36:39,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:39,402 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 282 transitions. [2020-08-22 00:36:39,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:39,402 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 282 transitions. [2020-08-22 00:36:39,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 00:36:39,404 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:39,404 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] [2020-08-22 00:36:39,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 00:36:39,404 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:39,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:39,405 INFO L82 PathProgramCache]: Analyzing trace with hash -2057398257, now seen corresponding path program 1 times [2020-08-22 00:36:39,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:39,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [263865450] [2020-08-22 00:36:39,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:39,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:39,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:39,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:39,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:39,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [263865450] [2020-08-22 00:36:39,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:39,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:39,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63357241] [2020-08-22 00:36:39,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:39,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:39,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:39,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:39,437 INFO L87 Difference]: Start difference. First operand 168 states and 282 transitions. Second operand 3 states. [2020-08-22 00:36:39,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:39,458 INFO L93 Difference]: Finished difference Result 392 states and 664 transitions. [2020-08-22 00:36:39,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:39,459 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 00:36:39,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:39,461 INFO L225 Difference]: With dead ends: 392 [2020-08-22 00:36:39,461 INFO L226 Difference]: Without dead ends: 234 [2020-08-22 00:36:39,462 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 [2020-08-22 00:36:39,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-08-22 00:36:39,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 232. [2020-08-22 00:36:39,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-08-22 00:36:39,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 386 transitions. [2020-08-22 00:36:39,479 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 386 transitions. Word has length 21 [2020-08-22 00:36:39,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:39,479 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 386 transitions. [2020-08-22 00:36:39,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:39,480 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 386 transitions. [2020-08-22 00:36:39,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 00:36:39,482 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:39,482 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] [2020-08-22 00:36:39,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 00:36:39,482 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:39,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:39,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1232183873, now seen corresponding path program 1 times [2020-08-22 00:36:39,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:39,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1203101218] [2020-08-22 00:36:39,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:39,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:39,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:39,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:39,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:39,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1203101218] [2020-08-22 00:36:39,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:39,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:39,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940732835] [2020-08-22 00:36:39,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:39,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:39,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:39,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:39,512 INFO L87 Difference]: Start difference. First operand 232 states and 386 transitions. Second operand 3 states. [2020-08-22 00:36:39,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:39,531 INFO L93 Difference]: Finished difference Result 348 states and 576 transitions. [2020-08-22 00:36:39,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:39,531 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 00:36:39,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:39,533 INFO L225 Difference]: With dead ends: 348 [2020-08-22 00:36:39,533 INFO L226 Difference]: Without dead ends: 238 [2020-08-22 00:36:39,535 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 [2020-08-22 00:36:39,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-08-22 00:36:39,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 236. [2020-08-22 00:36:39,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-08-22 00:36:39,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 386 transitions. [2020-08-22 00:36:39,549 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 386 transitions. Word has length 22 [2020-08-22 00:36:39,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:39,549 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 386 transitions. [2020-08-22 00:36:39,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:39,549 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 386 transitions. [2020-08-22 00:36:39,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 00:36:39,551 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:39,551 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] [2020-08-22 00:36:39,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 00:36:39,552 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:39,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:39,552 INFO L82 PathProgramCache]: Analyzing trace with hash 645377859, now seen corresponding path program 1 times [2020-08-22 00:36:39,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:39,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1887886683] [2020-08-22 00:36:39,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:39,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:39,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:39,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:39,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:39,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1887886683] [2020-08-22 00:36:39,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:39,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:39,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126117033] [2020-08-22 00:36:39,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:39,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:39,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:39,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:39,616 INFO L87 Difference]: Start difference. First operand 236 states and 386 transitions. Second operand 3 states. [2020-08-22 00:36:39,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:39,652 INFO L93 Difference]: Finished difference Result 428 states and 712 transitions. [2020-08-22 00:36:39,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:39,659 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 00:36:39,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:39,662 INFO L225 Difference]: With dead ends: 428 [2020-08-22 00:36:39,662 INFO L226 Difference]: Without dead ends: 426 [2020-08-22 00:36:39,662 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 [2020-08-22 00:36:39,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-08-22 00:36:39,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 328. [2020-08-22 00:36:39,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-08-22 00:36:39,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 526 transitions. [2020-08-22 00:36:39,686 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 526 transitions. Word has length 22 [2020-08-22 00:36:39,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:39,690 INFO L479 AbstractCegarLoop]: Abstraction has 328 states and 526 transitions. [2020-08-22 00:36:39,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:39,690 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 526 transitions. [2020-08-22 00:36:39,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 00:36:39,698 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:39,698 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] [2020-08-22 00:36:39,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 00:36:39,702 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:39,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:39,702 INFO L82 PathProgramCache]: Analyzing trace with hash 903543297, now seen corresponding path program 1 times [2020-08-22 00:36:39,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:39,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884094161] [2020-08-22 00:36:39,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:39,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:39,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:39,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:39,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:39,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884094161] [2020-08-22 00:36:39,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:39,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:39,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53718579] [2020-08-22 00:36:39,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:39,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:39,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:39,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:39,737 INFO L87 Difference]: Start difference. First operand 328 states and 526 transitions. Second operand 3 states. [2020-08-22 00:36:39,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:39,762 INFO L93 Difference]: Finished difference Result 764 states and 1232 transitions. [2020-08-22 00:36:39,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:39,763 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 00:36:39,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:39,766 INFO L225 Difference]: With dead ends: 764 [2020-08-22 00:36:39,766 INFO L226 Difference]: Without dead ends: 450 [2020-08-22 00:36:39,767 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 [2020-08-22 00:36:39,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-08-22 00:36:39,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 448. [2020-08-22 00:36:39,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2020-08-22 00:36:39,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 710 transitions. [2020-08-22 00:36:39,785 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 710 transitions. Word has length 22 [2020-08-22 00:36:39,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:39,785 INFO L479 AbstractCegarLoop]: Abstraction has 448 states and 710 transitions. [2020-08-22 00:36:39,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:39,786 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 710 transitions. [2020-08-22 00:36:39,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 00:36:39,787 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:39,787 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] [2020-08-22 00:36:39,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 00:36:39,788 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:39,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:39,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1467908124, now seen corresponding path program 1 times [2020-08-22 00:36:39,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:39,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [85655796] [2020-08-22 00:36:39,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:39,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:39,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:39,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:39,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:39,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [85655796] [2020-08-22 00:36:39,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:39,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:39,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024747941] [2020-08-22 00:36:39,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:39,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:39,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:39,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:39,816 INFO L87 Difference]: Start difference. First operand 448 states and 710 transitions. Second operand 3 states. [2020-08-22 00:36:39,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:39,836 INFO L93 Difference]: Finished difference Result 672 states and 1060 transitions. [2020-08-22 00:36:39,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:39,836 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 00:36:39,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:39,839 INFO L225 Difference]: With dead ends: 672 [2020-08-22 00:36:39,839 INFO L226 Difference]: Without dead ends: 458 [2020-08-22 00:36:39,840 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 [2020-08-22 00:36:39,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2020-08-22 00:36:39,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 456. [2020-08-22 00:36:39,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-08-22 00:36:39,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 710 transitions. [2020-08-22 00:36:39,855 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 710 transitions. Word has length 23 [2020-08-22 00:36:39,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:39,855 INFO L479 AbstractCegarLoop]: Abstraction has 456 states and 710 transitions. [2020-08-22 00:36:39,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:39,856 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 710 transitions. [2020-08-22 00:36:39,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 00:36:39,857 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:39,857 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] [2020-08-22 00:36:39,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 00:36:39,857 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:39,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:39,858 INFO L82 PathProgramCache]: Analyzing trace with hash -2054714138, now seen corresponding path program 1 times [2020-08-22 00:36:39,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:39,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393401619] [2020-08-22 00:36:39,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:39,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:39,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:39,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:39,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:39,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1393401619] [2020-08-22 00:36:39,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:39,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:39,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653588959] [2020-08-22 00:36:39,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:39,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:39,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:39,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:39,888 INFO L87 Difference]: Start difference. First operand 456 states and 710 transitions. Second operand 3 states. [2020-08-22 00:36:39,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:39,914 INFO L93 Difference]: Finished difference Result 812 states and 1288 transitions. [2020-08-22 00:36:39,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:39,915 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 00:36:39,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:39,919 INFO L225 Difference]: With dead ends: 812 [2020-08-22 00:36:39,919 INFO L226 Difference]: Without dead ends: 810 [2020-08-22 00:36:39,920 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 [2020-08-22 00:36:39,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2020-08-22 00:36:39,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 648. [2020-08-22 00:36:39,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 648 states. [2020-08-22 00:36:39,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 982 transitions. [2020-08-22 00:36:39,939 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 982 transitions. Word has length 23 [2020-08-22 00:36:39,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:39,939 INFO L479 AbstractCegarLoop]: Abstraction has 648 states and 982 transitions. [2020-08-22 00:36:39,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:39,940 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 982 transitions. [2020-08-22 00:36:39,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 00:36:39,941 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:39,941 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] [2020-08-22 00:36:39,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 00:36:39,942 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:39,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:39,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1796548700, now seen corresponding path program 1 times [2020-08-22 00:36:39,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:39,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [445881969] [2020-08-22 00:36:39,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:39,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:39,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:39,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:39,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:39,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [445881969] [2020-08-22 00:36:39,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:39,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:39,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311070609] [2020-08-22 00:36:39,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:39,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:39,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:39,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:39,970 INFO L87 Difference]: Start difference. First operand 648 states and 982 transitions. Second operand 3 states. [2020-08-22 00:36:39,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:39,999 INFO L93 Difference]: Finished difference Result 1500 states and 2280 transitions. [2020-08-22 00:36:39,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:39,999 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 00:36:40,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:40,004 INFO L225 Difference]: With dead ends: 1500 [2020-08-22 00:36:40,004 INFO L226 Difference]: Without dead ends: 874 [2020-08-22 00:36:40,006 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 [2020-08-22 00:36:40,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2020-08-22 00:36:40,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 872. [2020-08-22 00:36:40,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 872 states. [2020-08-22 00:36:40,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1302 transitions. [2020-08-22 00:36:40,037 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1302 transitions. Word has length 23 [2020-08-22 00:36:40,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:40,037 INFO L479 AbstractCegarLoop]: Abstraction has 872 states and 1302 transitions. [2020-08-22 00:36:40,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:40,037 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1302 transitions. [2020-08-22 00:36:40,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 00:36:40,039 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:40,039 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] [2020-08-22 00:36:40,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 00:36:40,040 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:40,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:40,040 INFO L82 PathProgramCache]: Analyzing trace with hash 728586230, now seen corresponding path program 1 times [2020-08-22 00:36:40,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:40,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [984483956] [2020-08-22 00:36:40,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:40,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:40,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:40,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:40,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:40,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [984483956] [2020-08-22 00:36:40,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:40,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:40,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422738874] [2020-08-22 00:36:40,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:40,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:40,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:40,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:40,066 INFO L87 Difference]: Start difference. First operand 872 states and 1302 transitions. Second operand 3 states. [2020-08-22 00:36:40,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:40,094 INFO L93 Difference]: Finished difference Result 1308 states and 1944 transitions. [2020-08-22 00:36:40,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:40,095 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-22 00:36:40,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:40,099 INFO L225 Difference]: With dead ends: 1308 [2020-08-22 00:36:40,100 INFO L226 Difference]: Without dead ends: 890 [2020-08-22 00:36:40,101 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 [2020-08-22 00:36:40,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2020-08-22 00:36:40,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 888. [2020-08-22 00:36:40,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 888 states. [2020-08-22 00:36:40,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1302 transitions. [2020-08-22 00:36:40,146 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1302 transitions. Word has length 24 [2020-08-22 00:36:40,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:40,146 INFO L479 AbstractCegarLoop]: Abstraction has 888 states and 1302 transitions. [2020-08-22 00:36:40,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:40,146 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1302 transitions. [2020-08-22 00:36:40,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 00:36:40,148 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:40,148 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] [2020-08-22 00:36:40,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 00:36:40,148 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:40,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:40,148 INFO L82 PathProgramCache]: Analyzing trace with hash 141780216, now seen corresponding path program 1 times [2020-08-22 00:36:40,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:40,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017617939] [2020-08-22 00:36:40,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:40,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:40,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:40,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:40,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:40,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2017617939] [2020-08-22 00:36:40,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:40,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:40,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737519670] [2020-08-22 00:36:40,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:40,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:40,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:40,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:40,190 INFO L87 Difference]: Start difference. First operand 888 states and 1302 transitions. Second operand 3 states. [2020-08-22 00:36:40,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:40,242 INFO L93 Difference]: Finished difference Result 1548 states and 2312 transitions. [2020-08-22 00:36:40,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:40,243 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-22 00:36:40,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:40,253 INFO L225 Difference]: With dead ends: 1548 [2020-08-22 00:36:40,253 INFO L226 Difference]: Without dead ends: 1546 [2020-08-22 00:36:40,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:40,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2020-08-22 00:36:40,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1288. [2020-08-22 00:36:40,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1288 states. [2020-08-22 00:36:40,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 1830 transitions. [2020-08-22 00:36:40,314 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 1830 transitions. Word has length 24 [2020-08-22 00:36:40,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:40,316 INFO L479 AbstractCegarLoop]: Abstraction has 1288 states and 1830 transitions. [2020-08-22 00:36:40,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:40,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 1830 transitions. [2020-08-22 00:36:40,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 00:36:40,321 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:40,321 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] [2020-08-22 00:36:40,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 00:36:40,322 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:40,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:40,323 INFO L82 PathProgramCache]: Analyzing trace with hash 399945654, now seen corresponding path program 1 times [2020-08-22 00:36:40,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:40,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [654519310] [2020-08-22 00:36:40,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:40,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:40,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:40,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:40,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:40,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [654519310] [2020-08-22 00:36:40,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:40,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:40,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143139045] [2020-08-22 00:36:40,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:40,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:40,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:40,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:40,372 INFO L87 Difference]: Start difference. First operand 1288 states and 1830 transitions. Second operand 3 states. [2020-08-22 00:36:40,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:40,433 INFO L93 Difference]: Finished difference Result 2956 states and 4200 transitions. [2020-08-22 00:36:40,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:40,433 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-22 00:36:40,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:40,445 INFO L225 Difference]: With dead ends: 2956 [2020-08-22 00:36:40,445 INFO L226 Difference]: Without dead ends: 1706 [2020-08-22 00:36:40,450 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 [2020-08-22 00:36:40,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1706 states. [2020-08-22 00:36:40,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1706 to 1704. [2020-08-22 00:36:40,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1704 states. [2020-08-22 00:36:40,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1704 states to 1704 states and 2374 transitions. [2020-08-22 00:36:40,520 INFO L78 Accepts]: Start accepts. Automaton has 1704 states and 2374 transitions. Word has length 24 [2020-08-22 00:36:40,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:40,520 INFO L479 AbstractCegarLoop]: Abstraction has 1704 states and 2374 transitions. [2020-08-22 00:36:40,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:40,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1704 states and 2374 transitions. [2020-08-22 00:36:40,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 00:36:40,525 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:40,526 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] [2020-08-22 00:36:40,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 00:36:40,526 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:40,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:40,527 INFO L82 PathProgramCache]: Analyzing trace with hash 100434809, now seen corresponding path program 1 times [2020-08-22 00:36:40,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:40,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1879935738] [2020-08-22 00:36:40,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:40,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:40,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:40,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:40,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:40,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1879935738] [2020-08-22 00:36:40,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:40,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:40,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765445076] [2020-08-22 00:36:40,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:40,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:40,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:40,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:40,568 INFO L87 Difference]: Start difference. First operand 1704 states and 2374 transitions. Second operand 3 states. [2020-08-22 00:36:40,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:40,627 INFO L93 Difference]: Finished difference Result 2556 states and 3544 transitions. [2020-08-22 00:36:40,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:40,628 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-22 00:36:40,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:40,636 INFO L225 Difference]: With dead ends: 2556 [2020-08-22 00:36:40,636 INFO L226 Difference]: Without dead ends: 1738 [2020-08-22 00:36:40,638 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 [2020-08-22 00:36:40,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2020-08-22 00:36:40,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1736. [2020-08-22 00:36:40,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1736 states. [2020-08-22 00:36:40,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 2374 transitions. [2020-08-22 00:36:40,694 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 2374 transitions. Word has length 25 [2020-08-22 00:36:40,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:40,695 INFO L479 AbstractCegarLoop]: Abstraction has 1736 states and 2374 transitions. [2020-08-22 00:36:40,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:40,695 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 2374 transitions. [2020-08-22 00:36:40,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 00:36:40,698 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:40,698 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] [2020-08-22 00:36:40,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 00:36:40,699 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:40,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:40,699 INFO L82 PathProgramCache]: Analyzing trace with hash -486371205, now seen corresponding path program 1 times [2020-08-22 00:36:40,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:40,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [79980242] [2020-08-22 00:36:40,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:40,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:40,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:40,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:40,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:40,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [79980242] [2020-08-22 00:36:40,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:40,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:40,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6344978] [2020-08-22 00:36:40,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:40,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:40,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:40,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:40,727 INFO L87 Difference]: Start difference. First operand 1736 states and 2374 transitions. Second operand 3 states. [2020-08-22 00:36:40,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:40,784 INFO L93 Difference]: Finished difference Result 2956 states and 4104 transitions. [2020-08-22 00:36:40,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:40,785 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-22 00:36:40,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:40,799 INFO L225 Difference]: With dead ends: 2956 [2020-08-22 00:36:40,799 INFO L226 Difference]: Without dead ends: 2954 [2020-08-22 00:36:40,801 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 [2020-08-22 00:36:40,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2020-08-22 00:36:40,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2568. [2020-08-22 00:36:40,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2568 states. [2020-08-22 00:36:40,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 3398 transitions. [2020-08-22 00:36:40,893 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 3398 transitions. Word has length 25 [2020-08-22 00:36:40,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:40,893 INFO L479 AbstractCegarLoop]: Abstraction has 2568 states and 3398 transitions. [2020-08-22 00:36:40,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:40,893 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 3398 transitions. [2020-08-22 00:36:40,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 00:36:40,898 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:40,898 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] [2020-08-22 00:36:40,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 00:36:40,899 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:40,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:40,899 INFO L82 PathProgramCache]: Analyzing trace with hash -228205767, now seen corresponding path program 1 times [2020-08-22 00:36:40,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:40,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [304131302] [2020-08-22 00:36:40,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:40,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:40,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:40,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:40,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:40,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [304131302] [2020-08-22 00:36:40,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:40,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:40,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002867139] [2020-08-22 00:36:40,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:40,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:40,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:40,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:40,925 INFO L87 Difference]: Start difference. First operand 2568 states and 3398 transitions. Second operand 3 states. [2020-08-22 00:36:40,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:40,992 INFO L93 Difference]: Finished difference Result 5836 states and 7688 transitions. [2020-08-22 00:36:40,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:40,992 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-22 00:36:40,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:41,007 INFO L225 Difference]: With dead ends: 5836 [2020-08-22 00:36:41,008 INFO L226 Difference]: Without dead ends: 3338 [2020-08-22 00:36:41,013 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 [2020-08-22 00:36:41,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2020-08-22 00:36:41,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 3336. [2020-08-22 00:36:41,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3336 states. [2020-08-22 00:36:41,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3336 states to 3336 states and 4294 transitions. [2020-08-22 00:36:41,112 INFO L78 Accepts]: Start accepts. Automaton has 3336 states and 4294 transitions. Word has length 25 [2020-08-22 00:36:41,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:41,112 INFO L479 AbstractCegarLoop]: Abstraction has 3336 states and 4294 transitions. [2020-08-22 00:36:41,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:41,112 INFO L276 IsEmpty]: Start isEmpty. Operand 3336 states and 4294 transitions. [2020-08-22 00:36:41,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 00:36:41,117 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:41,117 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:36:41,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 00:36:41,118 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:41,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:41,118 INFO L82 PathProgramCache]: Analyzing trace with hash 2102577579, now seen corresponding path program 1 times [2020-08-22 00:36:41,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:41,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1968899455] [2020-08-22 00:36:41,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:41,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:41,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:41,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:41,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:41,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1968899455] [2020-08-22 00:36:41,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:41,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:41,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717254765] [2020-08-22 00:36:41,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:41,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:41,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:41,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:41,139 INFO L87 Difference]: Start difference. First operand 3336 states and 4294 transitions. Second operand 3 states. [2020-08-22 00:36:41,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:41,193 INFO L93 Difference]: Finished difference Result 5004 states and 6408 transitions. [2020-08-22 00:36:41,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:41,194 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-22 00:36:41,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:41,208 INFO L225 Difference]: With dead ends: 5004 [2020-08-22 00:36:41,208 INFO L226 Difference]: Without dead ends: 3402 [2020-08-22 00:36:41,211 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:41,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3402 states. [2020-08-22 00:36:41,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3402 to 3400. [2020-08-22 00:36:41,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3400 states. [2020-08-22 00:36:41,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3400 states to 3400 states and 4294 transitions. [2020-08-22 00:36:41,323 INFO L78 Accepts]: Start accepts. Automaton has 3400 states and 4294 transitions. Word has length 26 [2020-08-22 00:36:41,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:41,323 INFO L479 AbstractCegarLoop]: Abstraction has 3400 states and 4294 transitions. [2020-08-22 00:36:41,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:41,323 INFO L276 IsEmpty]: Start isEmpty. Operand 3400 states and 4294 transitions. [2020-08-22 00:36:41,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 00:36:41,328 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:41,328 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:36:41,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 00:36:41,328 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:41,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:41,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1515771565, now seen corresponding path program 1 times [2020-08-22 00:36:41,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:41,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [464184231] [2020-08-22 00:36:41,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:41,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:41,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:41,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:41,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:41,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [464184231] [2020-08-22 00:36:41,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:41,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:41,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933339134] [2020-08-22 00:36:41,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:41,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:41,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:41,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:41,349 INFO L87 Difference]: Start difference. First operand 3400 states and 4294 transitions. Second operand 3 states. [2020-08-22 00:36:41,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:41,444 INFO L93 Difference]: Finished difference Result 9804 states and 12104 transitions. [2020-08-22 00:36:41,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:41,445 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-22 00:36:41,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:41,475 INFO L225 Difference]: With dead ends: 9804 [2020-08-22 00:36:41,475 INFO L226 Difference]: Without dead ends: 6538 [2020-08-22 00:36:41,482 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 [2020-08-22 00:36:41,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6538 states. [2020-08-22 00:36:41,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6538 to 6536. [2020-08-22 00:36:41,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6536 states. [2020-08-22 00:36:41,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 7814 transitions. [2020-08-22 00:36:41,671 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 7814 transitions. Word has length 26 [2020-08-22 00:36:41,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:41,671 INFO L479 AbstractCegarLoop]: Abstraction has 6536 states and 7814 transitions. [2020-08-22 00:36:41,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:41,671 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 7814 transitions. [2020-08-22 00:36:41,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 00:36:41,679 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:41,680 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:36:41,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 00:36:41,680 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:41,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:41,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1257606127, now seen corresponding path program 1 times [2020-08-22 00:36:41,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:41,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1565900498] [2020-08-22 00:36:41,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:41,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:41,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:41,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:41,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:41,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1565900498] [2020-08-22 00:36:41,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:41,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:41,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130971053] [2020-08-22 00:36:41,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:41,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:41,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:41,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:41,701 INFO L87 Difference]: Start difference. First operand 6536 states and 7814 transitions. Second operand 3 states. [2020-08-22 00:36:41,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:41,879 INFO L93 Difference]: Finished difference Result 7052 states and 8584 transitions. [2020-08-22 00:36:41,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:41,879 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-22 00:36:41,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:41,911 INFO L225 Difference]: With dead ends: 7052 [2020-08-22 00:36:41,911 INFO L226 Difference]: Without dead ends: 7050 [2020-08-22 00:36:41,913 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 [2020-08-22 00:36:41,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7050 states. [2020-08-22 00:36:42,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7050 to 6536. [2020-08-22 00:36:42,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6536 states. [2020-08-22 00:36:42,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 7686 transitions. [2020-08-22 00:36:42,099 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 7686 transitions. Word has length 26 [2020-08-22 00:36:42,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:42,099 INFO L479 AbstractCegarLoop]: Abstraction has 6536 states and 7686 transitions. [2020-08-22 00:36:42,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:42,099 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 7686 transitions. [2020-08-22 00:36:42,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 00:36:42,109 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:42,109 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:36:42,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 00:36:42,109 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:42,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:42,110 INFO L82 PathProgramCache]: Analyzing trace with hash -255505650, now seen corresponding path program 1 times [2020-08-22 00:36:42,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:42,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162703317] [2020-08-22 00:36:42,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:42,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:42,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:42,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:42,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:42,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162703317] [2020-08-22 00:36:42,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:42,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:42,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602171766] [2020-08-22 00:36:42,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:42,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:42,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:42,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:42,133 INFO L87 Difference]: Start difference. First operand 6536 states and 7686 transitions. Second operand 3 states. [2020-08-22 00:36:42,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:42,276 INFO L93 Difference]: Finished difference Result 10634 states and 12423 transitions. [2020-08-22 00:36:42,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:42,276 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-22 00:36:42,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:42,294 INFO L225 Difference]: With dead ends: 10634 [2020-08-22 00:36:42,295 INFO L226 Difference]: Without dead ends: 10632 [2020-08-22 00:36:42,299 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 [2020-08-22 00:36:42,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10632 states. [2020-08-22 00:36:42,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10632 to 10120. [2020-08-22 00:36:42,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10120 states. [2020-08-22 00:36:42,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10120 states to 10120 states and 11654 transitions. [2020-08-22 00:36:42,538 INFO L78 Accepts]: Start accepts. Automaton has 10120 states and 11654 transitions. Word has length 27 [2020-08-22 00:36:42,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:42,538 INFO L479 AbstractCegarLoop]: Abstraction has 10120 states and 11654 transitions. [2020-08-22 00:36:42,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:42,539 INFO L276 IsEmpty]: Start isEmpty. Operand 10120 states and 11654 transitions. [2020-08-22 00:36:42,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 00:36:42,553 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:36:42,554 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:36:42,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-22 00:36:42,554 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:36:42,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:36:42,554 INFO L82 PathProgramCache]: Analyzing trace with hash 2659788, now seen corresponding path program 1 times [2020-08-22 00:36:42,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:36:42,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1154057095] [2020-08-22 00:36:42,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:36:42,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:42,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:36:42,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:36:42,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:36:42,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1154057095] [2020-08-22 00:36:42,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:36:42,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 00:36:42,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644718198] [2020-08-22 00:36:42,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 00:36:42,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:36:42,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 00:36:42,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 00:36:42,581 INFO L87 Difference]: Start difference. First operand 10120 states and 11654 transitions. Second operand 3 states. [2020-08-22 00:36:42,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:36:42,750 INFO L93 Difference]: Finished difference Result 22664 states and 25734 transitions. [2020-08-22 00:36:42,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 00:36:42,750 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-22 00:36:42,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:36:42,751 INFO L225 Difference]: With dead ends: 22664 [2020-08-22 00:36:42,751 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 00:36:42,782 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 [2020-08-22 00:36:42,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 00:36:42,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 00:36:42,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 00:36:42,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 00:36:42,783 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2020-08-22 00:36:42,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:36:42,783 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 00:36:42,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 00:36:42,783 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 00:36:42,783 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 00:36:42,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-22 00:36:42,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 00:36:42,807 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 00:36:42,807 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-22 00:36:42,807 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-22 00:36:42,807 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 00:36:42,807 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 00:36:42,807 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-22 00:36:42,807 INFO L268 CegarLoopResult]: For program point L93-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 00:36:42,807 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 149) no Hoare annotation was computed. [2020-08-22 00:36:42,808 INFO L268 CegarLoopResult]: For program point L85-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 00:36:42,808 INFO L268 CegarLoopResult]: For program point L110(line 110) no Hoare annotation was computed. [2020-08-22 00:36:42,808 INFO L268 CegarLoopResult]: For program point L77-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 00:36:42,808 INFO L268 CegarLoopResult]: For program point L135(line 135) no Hoare annotation was computed. [2020-08-22 00:36:42,808 INFO L268 CegarLoopResult]: For program point L69-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 00:36:42,808 INFO L268 CegarLoopResult]: For program point L61(lines 61 63) no Hoare annotation was computed. [2020-08-22 00:36:42,808 INFO L268 CegarLoopResult]: For program point L61-2(lines 36 144) no Hoare annotation was computed. [2020-08-22 00:36:42,808 INFO L268 CegarLoopResult]: For program point L119-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 00:36:42,809 INFO L268 CegarLoopResult]: For program point L120(line 120) no Hoare annotation was computed. [2020-08-22 00:36:42,809 INFO L271 CegarLoopResult]: At program point L145(lines 5 149) the Hoare annotation is: true [2020-08-22 00:36:42,809 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 149) no Hoare annotation was computed. [2020-08-22 00:36:42,809 INFO L268 CegarLoopResult]: For program point L104-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 00:36:42,809 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-08-22 00:36:42,809 INFO L268 CegarLoopResult]: For program point L129-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 00:36:42,809 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 147) no Hoare annotation was computed. [2020-08-22 00:36:42,810 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 149) the Hoare annotation is: true [2020-08-22 00:36:42,810 INFO L268 CegarLoopResult]: For program point L105(line 105) no Hoare annotation was computed. [2020-08-22 00:36:42,810 INFO L268 CegarLoopResult]: For program point L130(line 130) no Hoare annotation was computed. [2020-08-22 00:36:42,810 INFO L268 CegarLoopResult]: For program point L89-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 00:36:42,810 INFO L268 CegarLoopResult]: For program point L114-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 00:36:42,810 INFO L268 CegarLoopResult]: For program point L81-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 00:36:42,810 INFO L271 CegarLoopResult]: At program point L139-1(lines 36 144) the Hoare annotation is: true [2020-08-22 00:36:42,810 INFO L268 CegarLoopResult]: For program point L73-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 00:36:42,811 INFO L268 CegarLoopResult]: For program point L65-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 00:36:42,811 INFO L268 CegarLoopResult]: For program point L115(line 115) no Hoare annotation was computed. [2020-08-22 00:36:42,811 INFO L268 CegarLoopResult]: For program point L140(line 140) no Hoare annotation was computed. [2020-08-22 00:36:42,811 INFO L264 CegarLoopResult]: At program point L140-1(lines 5 149) the Hoare annotation is: false [2020-08-22 00:36:42,811 INFO L268 CegarLoopResult]: For program point L99-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 00:36:42,811 INFO L268 CegarLoopResult]: For program point L124-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 00:36:42,811 INFO L268 CegarLoopResult]: For program point L100(line 100) no Hoare annotation was computed. [2020-08-22 00:36:42,811 INFO L268 CegarLoopResult]: For program point L125(line 125) no Hoare annotation was computed. [2020-08-22 00:36:42,812 INFO L268 CegarLoopResult]: For program point L109-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 00:36:42,812 INFO L268 CegarLoopResult]: For program point L134-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 00:36:42,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 12:36:42 BoogieIcfgContainer [2020-08-22 00:36:42,823 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 00:36:42,826 INFO L168 Benchmark]: Toolchain (without parser) took 5419.39 ms. Allocated memory was 141.0 MB in the beginning and 328.2 MB in the end (delta: 187.2 MB). Free memory was 104.0 MB in the beginning and 99.8 MB in the end (delta: 4.2 MB). Peak memory consumption was 191.4 MB. Max. memory is 7.1 GB. [2020-08-22 00:36:42,826 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.2 MB in the end (delta: 419.4 kB). Peak memory consumption was 419.4 kB. Max. memory is 7.1 GB. [2020-08-22 00:36:42,827 INFO L168 Benchmark]: CACSL2BoogieTranslator took 279.50 ms. Allocated memory is still 141.0 MB. Free memory was 104.0 MB in the beginning and 93.2 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2020-08-22 00:36:42,828 INFO L168 Benchmark]: Boogie Preprocessor took 117.50 ms. Allocated memory was 141.0 MB in the beginning and 204.5 MB in the end (delta: 63.4 MB). Free memory was 93.2 MB in the beginning and 182.0 MB in the end (delta: -88.8 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2020-08-22 00:36:42,828 INFO L168 Benchmark]: RCFGBuilder took 349.70 ms. Allocated memory is still 204.5 MB. Free memory was 182.0 MB in the beginning and 162.8 MB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 7.1 GB. [2020-08-22 00:36:42,829 INFO L168 Benchmark]: TraceAbstraction took 4667.99 ms. Allocated memory was 204.5 MB in the beginning and 328.2 MB in the end (delta: 123.7 MB). Free memory was 162.8 MB in the beginning and 99.8 MB in the end (delta: 63.0 MB). Peak memory consumption was 186.8 MB. Max. memory is 7.1 GB. [2020-08-22 00:36:42,831 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.2 MB in the end (delta: 419.4 kB). Peak memory consumption was 419.4 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 279.50 ms. Allocated memory is still 141.0 MB. Free memory was 104.0 MB in the beginning and 93.2 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 117.50 ms. Allocated memory was 141.0 MB in the beginning and 204.5 MB in the end (delta: 63.4 MB). Free memory was 93.2 MB in the beginning and 182.0 MB in the end (delta: -88.8 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 349.70 ms. Allocated memory is still 204.5 MB. Free memory was 182.0 MB in the beginning and 162.8 MB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4667.99 ms. Allocated memory was 204.5 MB in the beginning and 328.2 MB in the end (delta: 123.7 MB). Free memory was 162.8 MB in the beginning and 99.8 MB in the end (delta: 63.0 MB). Peak memory consumption was 186.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 147]: 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: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.4s, OverallIterations: 25, TraceHistogramMax: 1, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1937 SDtfs, 926 SDslu, 1314 SDs, 0 SdLazy, 133 SolverSat, 25 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 125 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10120occurred in iteration=24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.3s AutomataMinimizationTime, 25 MinimizatonAttempts, 2072 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 522 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, 575 NumberOfCodeBlocks, 575 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 550 ConstructedInterpolants, 0 QuantifiedInterpolants, 23930 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 25 InterpolantComputations, 25 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...