/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 false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_9.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-89f541c [2020-08-27 21:50:54,991 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-27 21:50:54,995 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-27 21:50:55,039 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-27 21:50:55,040 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-27 21:50:55,051 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-27 21:50:55,053 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-27 21:50:55,058 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-27 21:50:55,061 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-27 21:50:55,065 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-27 21:50:55,066 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-27 21:50:55,067 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-27 21:50:55,068 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-27 21:50:55,071 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-27 21:50:55,074 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-27 21:50:55,076 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-27 21:50:55,078 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-27 21:50:55,080 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-27 21:50:55,083 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-27 21:50:55,093 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-27 21:50:55,096 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-27 21:50:55,097 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-27 21:50:55,099 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-27 21:50:55,100 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-27 21:50:55,103 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-27 21:50:55,116 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-27 21:50:55,118 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-27 21:50:55,120 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-27 21:50:55,121 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 [2020-08-27 21:50:55,169 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-27 21:50:55,170 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-27 21:50:55,172 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-27 21:50:55,172 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-27 21:50:55,173 INFO L138 SettingsManager]: * Use SBE=true [2020-08-27 21:50:55,173 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-27 21:50:55,173 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-27 21:50:55,174 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-27 21:50:55,174 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-27 21:50:55,174 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-27 21:50:55,175 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-27 21:50:55,175 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-27 21:50:55,176 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-27 21:50:55,176 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-27 21:50:55,176 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-27 21:50:55,177 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-27 21:50:55,177 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-27 21:50:55,177 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-27 21:50:55,177 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-27 21:50:55,177 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-27 21:50:55,178 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-27 21:50:55,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-27 21:50:55,178 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-27 21:50:55,178 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-27 21:50:55,178 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-27 21:50:55,179 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-27 21:50:55,179 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-27 21:50:55,179 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-27 21:50:55,179 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-27 21:50:55,179 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 -> false [2020-08-27 21:50:55,672 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-27 21:50:55,697 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-27 21:50:55,703 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-27 21:50:55,705 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-27 21:50:55,706 INFO L275 PluginConnector]: CDTParser initialized [2020-08-27 21:50:55,707 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_9.c [2020-08-27 21:50:55,786 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/10adaf12b/f3cc618c7eb24bdfa3154b63bd9dbce2/FLAGb27e72925 [2020-08-27 21:50:56,274 INFO L306 CDTParser]: Found 1 translation units. [2020-08-27 21:50:56,275 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_9.c [2020-08-27 21:50:56,285 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/10adaf12b/f3cc618c7eb24bdfa3154b63bd9dbce2/FLAGb27e72925 [2020-08-27 21:50:56,623 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/10adaf12b/f3cc618c7eb24bdfa3154b63bd9dbce2 [2020-08-27 21:50:56,637 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-27 21:50:56,639 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-27 21:50:56,643 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-27 21:50:56,643 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-27 21:50:56,647 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-27 21:50:56,648 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 09:50:56" (1/1) ... [2020-08-27 21:50:56,654 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5537a615 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:56, skipping insertion in model container [2020-08-27 21:50:56,654 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 09:50:56" (1/1) ... [2020-08-27 21:50:56,664 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-27 21:50:56,694 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-27 21:50:56,942 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-27 21:50:56,948 INFO L203 MainTranslator]: Completed pre-run [2020-08-27 21:50:56,976 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-27 21:50:56,991 INFO L208 MainTranslator]: Completed translation [2020-08-27 21:50:56,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:56 WrapperNode [2020-08-27 21:50:56,992 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-27 21:50:56,993 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-27 21:50:56,993 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-27 21:50:56,993 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-27 21:50:57,006 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:56" (1/1) ... [2020-08-27 21:50:57,006 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:56" (1/1) ... [2020-08-27 21:50:57,091 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:56" (1/1) ... [2020-08-27 21:50:57,092 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:56" (1/1) ... [2020-08-27 21:50:57,101 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:56" (1/1) ... [2020-08-27 21:50:57,109 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:56" (1/1) ... [2020-08-27 21:50:57,111 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:56" (1/1) ... [2020-08-27 21:50:57,114 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-27 21:50:57,114 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-27 21:50:57,115 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-27 21:50:57,115 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-27 21:50:57,116 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:56" (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 [2020-08-27 21:50:57,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-27 21:50:57,200 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-27 21:50:57,200 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-27 21:50:57,200 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-27 21:50:57,200 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-27 21:50:57,200 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-27 21:50:57,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-27 21:50:57,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-27 21:50:57,499 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-27 21:50:57,499 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-27 21:50:57,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 09:50:57 BoogieIcfgContainer [2020-08-27 21:50:57,504 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-27 21:50:57,506 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-27 21:50:57,506 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-27 21:50:57,510 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-27 21:50:57,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 09:50:56" (1/3) ... [2020-08-27 21:50:57,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a00a886 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 09:50:57, skipping insertion in model container [2020-08-27 21:50:57,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:56" (2/3) ... [2020-08-27 21:50:57,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a00a886 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 09:50:57, skipping insertion in model container [2020-08-27 21:50:57,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 09:50:57" (3/3) ... [2020-08-27 21:50:57,515 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_9.c [2020-08-27 21:50:57,527 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-27 21:50:57,538 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-27 21:50:57,561 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-27 21:50:57,613 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-27 21:50:57,613 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-27 21:50:57,613 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-27 21:50:57,614 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-27 21:50:57,614 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-27 21:50:57,614 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-27 21:50:57,614 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-27 21:50:57,614 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-27 21:50:57,671 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-08-27 21:50:57,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-27 21:50:57,680 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:57,681 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:57,681 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:57,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:57,691 INFO L82 PathProgramCache]: Analyzing trace with hash 691982780, now seen corresponding path program 1 times [2020-08-27 21:50:57,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:57,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1843960163] [2020-08-27 21:50:57,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:57,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:57,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:57,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:57,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:57,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1843960163] [2020-08-27 21:50:57,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:57,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:57,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011181999] [2020-08-27 21:50:57,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:57,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:57,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:57,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:57,993 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 3 states. [2020-08-27 21:50:58,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:58,092 INFO L93 Difference]: Finished difference Result 81 states and 138 transitions. [2020-08-27 21:50:58,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:58,095 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-27 21:50:58,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:58,117 INFO L225 Difference]: With dead ends: 81 [2020-08-27 21:50:58,117 INFO L226 Difference]: Without dead ends: 66 [2020-08-27 21:50:58,122 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 [2020-08-27 21:50:58,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-27 21:50:58,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2020-08-27 21:50:58,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-27 21:50:58,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 81 transitions. [2020-08-27 21:50:58,179 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 81 transitions. Word has length 19 [2020-08-27 21:50:58,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:58,180 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 81 transitions. [2020-08-27 21:50:58,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:58,180 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 81 transitions. [2020-08-27 21:50:58,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-27 21:50:58,182 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:58,182 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:58,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-27 21:50:58,183 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:58,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:58,183 INFO L82 PathProgramCache]: Analyzing trace with hash 950148218, now seen corresponding path program 1 times [2020-08-27 21:50:58,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:58,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1086779355] [2020-08-27 21:50:58,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:58,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:58,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:58,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:58,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:58,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1086779355] [2020-08-27 21:50:58,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:58,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:58,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137530439] [2020-08-27 21:50:58,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:58,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:58,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:58,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:58,296 INFO L87 Difference]: Start difference. First operand 46 states and 81 transitions. Second operand 3 states. [2020-08-27 21:50:58,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:58,330 INFO L93 Difference]: Finished difference Result 107 states and 192 transitions. [2020-08-27 21:50:58,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:58,332 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-27 21:50:58,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:58,333 INFO L225 Difference]: With dead ends: 107 [2020-08-27 21:50:58,334 INFO L226 Difference]: Without dead ends: 66 [2020-08-27 21:50:58,335 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 [2020-08-27 21:50:58,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-27 21:50:58,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2020-08-27 21:50:58,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-27 21:50:58,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 113 transitions. [2020-08-27 21:50:58,347 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 113 transitions. Word has length 19 [2020-08-27 21:50:58,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:58,347 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 113 transitions. [2020-08-27 21:50:58,347 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:58,347 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 113 transitions. [2020-08-27 21:50:58,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-27 21:50:58,348 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:58,349 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] [2020-08-27 21:50:58,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-27 21:50:58,349 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:58,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:58,350 INFO L82 PathProgramCache]: Analyzing trace with hash -23156596, now seen corresponding path program 1 times [2020-08-27 21:50:58,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:58,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [890121844] [2020-08-27 21:50:58,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:58,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:58,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:58,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:58,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:58,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [890121844] [2020-08-27 21:50:58,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:58,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:58,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417939597] [2020-08-27 21:50:58,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:58,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:58,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:58,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:58,429 INFO L87 Difference]: Start difference. First operand 64 states and 113 transitions. Second operand 3 states. [2020-08-27 21:50:58,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:58,453 INFO L93 Difference]: Finished difference Result 99 states and 171 transitions. [2020-08-27 21:50:58,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:58,454 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-27 21:50:58,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:58,455 INFO L225 Difference]: With dead ends: 99 [2020-08-27 21:50:58,456 INFO L226 Difference]: Without dead ends: 69 [2020-08-27 21:50:58,457 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 [2020-08-27 21:50:58,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-27 21:50:58,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2020-08-27 21:50:58,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-27 21:50:58,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 115 transitions. [2020-08-27 21:50:58,467 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 115 transitions. Word has length 20 [2020-08-27 21:50:58,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:58,468 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 115 transitions. [2020-08-27 21:50:58,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:58,468 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 115 transitions. [2020-08-27 21:50:58,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-27 21:50:58,469 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:58,469 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] [2020-08-27 21:50:58,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-27 21:50:58,470 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:58,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:58,470 INFO L82 PathProgramCache]: Analyzing trace with hash -609962610, now seen corresponding path program 1 times [2020-08-27 21:50:58,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:58,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1463276291] [2020-08-27 21:50:58,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:58,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:58,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:58,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:58,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:58,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1463276291] [2020-08-27 21:50:58,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:58,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:58,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019472145] [2020-08-27 21:50:58,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:58,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:58,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:58,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:58,521 INFO L87 Difference]: Start difference. First operand 67 states and 115 transitions. Second operand 3 states. [2020-08-27 21:50:58,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:58,540 INFO L93 Difference]: Finished difference Result 124 states and 216 transitions. [2020-08-27 21:50:58,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:58,541 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-27 21:50:58,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:58,543 INFO L225 Difference]: With dead ends: 124 [2020-08-27 21:50:58,543 INFO L226 Difference]: Without dead ends: 122 [2020-08-27 21:50:58,544 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:58,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-27 21:50:58,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 88. [2020-08-27 21:50:58,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-27 21:50:58,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 152 transitions. [2020-08-27 21:50:58,556 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 152 transitions. Word has length 20 [2020-08-27 21:50:58,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:58,557 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 152 transitions. [2020-08-27 21:50:58,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:58,557 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 152 transitions. [2020-08-27 21:50:58,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-27 21:50:58,558 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:58,559 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:58,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-27 21:50:58,559 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:58,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:58,560 INFO L82 PathProgramCache]: Analyzing trace with hash -351797172, now seen corresponding path program 1 times [2020-08-27 21:50:58,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:58,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [415437730] [2020-08-27 21:50:58,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:58,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:58,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:58,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:58,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:58,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [415437730] [2020-08-27 21:50:58,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:58,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:58,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207252235] [2020-08-27 21:50:58,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:58,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:58,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:58,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:58,652 INFO L87 Difference]: Start difference. First operand 88 states and 152 transitions. Second operand 3 states. [2020-08-27 21:50:58,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:58,682 INFO L93 Difference]: Finished difference Result 204 states and 358 transitions. [2020-08-27 21:50:58,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:58,684 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-27 21:50:58,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:58,686 INFO L225 Difference]: With dead ends: 204 [2020-08-27 21:50:58,686 INFO L226 Difference]: Without dead ends: 124 [2020-08-27 21:50:58,688 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 [2020-08-27 21:50:58,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-27 21:50:58,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2020-08-27 21:50:58,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-08-27 21:50:58,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 210 transitions. [2020-08-27 21:50:58,709 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 210 transitions. Word has length 20 [2020-08-27 21:50:58,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:58,709 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 210 transitions. [2020-08-27 21:50:58,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:58,710 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 210 transitions. [2020-08-27 21:50:58,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-27 21:50:58,711 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:58,711 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] [2020-08-27 21:50:58,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-27 21:50:58,712 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:58,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:58,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1728757681, now seen corresponding path program 1 times [2020-08-27 21:50:58,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:58,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38066747] [2020-08-27 21:50:58,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:58,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:58,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:58,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:58,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:58,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38066747] [2020-08-27 21:50:58,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:58,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:58,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568143684] [2020-08-27 21:50:58,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:58,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:58,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:58,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:58,754 INFO L87 Difference]: Start difference. First operand 122 states and 210 transitions. Second operand 3 states. [2020-08-27 21:50:58,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:58,774 INFO L93 Difference]: Finished difference Result 183 states and 313 transitions. [2020-08-27 21:50:58,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:58,774 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-27 21:50:58,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:58,776 INFO L225 Difference]: With dead ends: 183 [2020-08-27 21:50:58,776 INFO L226 Difference]: Without dead ends: 126 [2020-08-27 21:50:58,777 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 [2020-08-27 21:50:58,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-08-27 21:50:58,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2020-08-27 21:50:58,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-08-27 21:50:58,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 210 transitions. [2020-08-27 21:50:58,789 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 210 transitions. Word has length 21 [2020-08-27 21:50:58,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:58,789 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 210 transitions. [2020-08-27 21:50:58,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:58,790 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 210 transitions. [2020-08-27 21:50:58,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-27 21:50:58,791 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:58,791 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] [2020-08-27 21:50:58,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-27 21:50:58,792 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:58,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:58,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1979403601, now seen corresponding path program 1 times [2020-08-27 21:50:58,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:58,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [221020168] [2020-08-27 21:50:58,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:58,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:58,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:58,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:58,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:58,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [221020168] [2020-08-27 21:50:58,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:58,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:58,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515108593] [2020-08-27 21:50:58,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:58,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:58,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:58,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:58,848 INFO L87 Difference]: Start difference. First operand 124 states and 210 transitions. Second operand 3 states. [2020-08-27 21:50:58,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:58,866 INFO L93 Difference]: Finished difference Result 228 states and 392 transitions. [2020-08-27 21:50:58,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:58,867 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-27 21:50:58,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:58,869 INFO L225 Difference]: With dead ends: 228 [2020-08-27 21:50:58,869 INFO L226 Difference]: Without dead ends: 226 [2020-08-27 21:50:58,870 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 [2020-08-27 21:50:58,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-08-27 21:50:58,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 168. [2020-08-27 21:50:58,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-27 21:50:58,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 282 transitions. [2020-08-27 21:50:58,883 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 282 transitions. Word has length 21 [2020-08-27 21:50:58,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:58,884 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 282 transitions. [2020-08-27 21:50:58,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:58,884 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 282 transitions. [2020-08-27 21:50:58,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-27 21:50:58,885 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:58,886 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] [2020-08-27 21:50:58,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-27 21:50:58,886 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:58,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:58,887 INFO L82 PathProgramCache]: Analyzing trace with hash -2057398257, now seen corresponding path program 1 times [2020-08-27 21:50:58,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:58,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1673481333] [2020-08-27 21:50:58,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:58,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:58,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:58,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:58,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:58,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1673481333] [2020-08-27 21:50:58,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:58,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:58,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339508597] [2020-08-27 21:50:58,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:58,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:58,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:58,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:58,937 INFO L87 Difference]: Start difference. First operand 168 states and 282 transitions. Second operand 3 states. [2020-08-27 21:50:58,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:58,964 INFO L93 Difference]: Finished difference Result 392 states and 664 transitions. [2020-08-27 21:50:58,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:58,965 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-27 21:50:58,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:58,967 INFO L225 Difference]: With dead ends: 392 [2020-08-27 21:50:58,967 INFO L226 Difference]: Without dead ends: 234 [2020-08-27 21:50:58,969 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:58,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-08-27 21:50:58,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 232. [2020-08-27 21:50:58,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-08-27 21:50:58,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 386 transitions. [2020-08-27 21:50:58,985 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 386 transitions. Word has length 21 [2020-08-27 21:50:58,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:58,985 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 386 transitions. [2020-08-27 21:50:58,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:58,985 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 386 transitions. [2020-08-27 21:50:58,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-27 21:50:58,987 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:58,988 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] [2020-08-27 21:50:58,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-27 21:50:58,988 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:58,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:58,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1232183873, now seen corresponding path program 1 times [2020-08-27 21:50:58,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:58,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [718786884] [2020-08-27 21:50:58,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:58,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:59,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:59,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:59,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:59,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [718786884] [2020-08-27 21:50:59,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:59,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:59,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249551000] [2020-08-27 21:50:59,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:59,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:59,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:59,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:59,022 INFO L87 Difference]: Start difference. First operand 232 states and 386 transitions. Second operand 3 states. [2020-08-27 21:50:59,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:59,042 INFO L93 Difference]: Finished difference Result 348 states and 576 transitions. [2020-08-27 21:50:59,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:59,043 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-27 21:50:59,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:59,047 INFO L225 Difference]: With dead ends: 348 [2020-08-27 21:50:59,048 INFO L226 Difference]: Without dead ends: 238 [2020-08-27 21:50:59,049 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 [2020-08-27 21:50:59,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-08-27 21:50:59,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 236. [2020-08-27 21:50:59,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-08-27 21:50:59,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 386 transitions. [2020-08-27 21:50:59,065 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 386 transitions. Word has length 22 [2020-08-27 21:50:59,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:59,067 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 386 transitions. [2020-08-27 21:50:59,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:59,067 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 386 transitions. [2020-08-27 21:50:59,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-27 21:50:59,069 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:59,069 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] [2020-08-27 21:50:59,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-27 21:50:59,076 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:59,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:59,076 INFO L82 PathProgramCache]: Analyzing trace with hash 645377859, now seen corresponding path program 1 times [2020-08-27 21:50:59,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:59,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [84604603] [2020-08-27 21:50:59,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:59,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:59,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:59,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:59,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:59,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [84604603] [2020-08-27 21:50:59,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:59,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:59,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90692118] [2020-08-27 21:50:59,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:59,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:59,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:59,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:59,138 INFO L87 Difference]: Start difference. First operand 236 states and 386 transitions. Second operand 3 states. [2020-08-27 21:50:59,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:59,174 INFO L93 Difference]: Finished difference Result 428 states and 712 transitions. [2020-08-27 21:50:59,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:59,175 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-27 21:50:59,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:59,178 INFO L225 Difference]: With dead ends: 428 [2020-08-27 21:50:59,178 INFO L226 Difference]: Without dead ends: 426 [2020-08-27 21:50:59,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:59,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-08-27 21:50:59,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 328. [2020-08-27 21:50:59,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-08-27 21:50:59,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 526 transitions. [2020-08-27 21:50:59,197 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 526 transitions. Word has length 22 [2020-08-27 21:50:59,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:59,199 INFO L479 AbstractCegarLoop]: Abstraction has 328 states and 526 transitions. [2020-08-27 21:50:59,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:59,199 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 526 transitions. [2020-08-27 21:50:59,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-27 21:50:59,210 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:59,210 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] [2020-08-27 21:50:59,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-27 21:50:59,210 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:59,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:59,211 INFO L82 PathProgramCache]: Analyzing trace with hash 903543297, now seen corresponding path program 1 times [2020-08-27 21:50:59,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:59,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156062129] [2020-08-27 21:50:59,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:59,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:59,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:59,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:59,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:59,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156062129] [2020-08-27 21:50:59,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:59,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:59,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405070152] [2020-08-27 21:50:59,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:59,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:59,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:59,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:59,248 INFO L87 Difference]: Start difference. First operand 328 states and 526 transitions. Second operand 3 states. [2020-08-27 21:50:59,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:59,296 INFO L93 Difference]: Finished difference Result 764 states and 1232 transitions. [2020-08-27 21:50:59,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:59,297 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-27 21:50:59,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:59,300 INFO L225 Difference]: With dead ends: 764 [2020-08-27 21:50:59,300 INFO L226 Difference]: Without dead ends: 450 [2020-08-27 21:50:59,306 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 [2020-08-27 21:50:59,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-08-27 21:50:59,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 448. [2020-08-27 21:50:59,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2020-08-27 21:50:59,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 710 transitions. [2020-08-27 21:50:59,333 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 710 transitions. Word has length 22 [2020-08-27 21:50:59,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:59,333 INFO L479 AbstractCegarLoop]: Abstraction has 448 states and 710 transitions. [2020-08-27 21:50:59,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:59,334 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 710 transitions. [2020-08-27 21:50:59,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-27 21:50:59,335 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:59,335 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] [2020-08-27 21:50:59,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-27 21:50:59,336 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:59,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:59,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1467908124, now seen corresponding path program 1 times [2020-08-27 21:50:59,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:59,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1908203816] [2020-08-27 21:50:59,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:59,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:59,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:59,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:59,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:59,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1908203816] [2020-08-27 21:50:59,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:59,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:59,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705697211] [2020-08-27 21:50:59,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:59,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:59,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:59,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:59,386 INFO L87 Difference]: Start difference. First operand 448 states and 710 transitions. Second operand 3 states. [2020-08-27 21:50:59,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:59,409 INFO L93 Difference]: Finished difference Result 672 states and 1060 transitions. [2020-08-27 21:50:59,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:59,410 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-27 21:50:59,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:59,413 INFO L225 Difference]: With dead ends: 672 [2020-08-27 21:50:59,413 INFO L226 Difference]: Without dead ends: 458 [2020-08-27 21:50:59,414 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 [2020-08-27 21:50:59,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2020-08-27 21:50:59,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 456. [2020-08-27 21:50:59,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-08-27 21:50:59,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 710 transitions. [2020-08-27 21:50:59,429 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 710 transitions. Word has length 23 [2020-08-27 21:50:59,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:59,430 INFO L479 AbstractCegarLoop]: Abstraction has 456 states and 710 transitions. [2020-08-27 21:50:59,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:59,430 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 710 transitions. [2020-08-27 21:50:59,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-27 21:50:59,431 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:59,431 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] [2020-08-27 21:50:59,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-27 21:50:59,432 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:59,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:59,432 INFO L82 PathProgramCache]: Analyzing trace with hash -2054714138, now seen corresponding path program 1 times [2020-08-27 21:50:59,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:59,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1663238755] [2020-08-27 21:50:59,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:59,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:59,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:59,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:59,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:59,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1663238755] [2020-08-27 21:50:59,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:59,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:59,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104660052] [2020-08-27 21:50:59,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:59,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:59,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:59,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:59,462 INFO L87 Difference]: Start difference. First operand 456 states and 710 transitions. Second operand 3 states. [2020-08-27 21:50:59,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:59,486 INFO L93 Difference]: Finished difference Result 812 states and 1288 transitions. [2020-08-27 21:50:59,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:59,486 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-27 21:50:59,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:59,491 INFO L225 Difference]: With dead ends: 812 [2020-08-27 21:50:59,491 INFO L226 Difference]: Without dead ends: 810 [2020-08-27 21:50:59,492 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 [2020-08-27 21:50:59,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2020-08-27 21:50:59,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 648. [2020-08-27 21:50:59,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 648 states. [2020-08-27 21:50:59,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 982 transitions. [2020-08-27 21:50:59,512 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 982 transitions. Word has length 23 [2020-08-27 21:50:59,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:59,512 INFO L479 AbstractCegarLoop]: Abstraction has 648 states and 982 transitions. [2020-08-27 21:50:59,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:59,512 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 982 transitions. [2020-08-27 21:50:59,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-27 21:50:59,514 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:59,514 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] [2020-08-27 21:50:59,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-27 21:50:59,514 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:59,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:59,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1796548700, now seen corresponding path program 1 times [2020-08-27 21:50:59,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:59,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [468364906] [2020-08-27 21:50:59,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:59,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:59,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:59,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:59,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:59,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [468364906] [2020-08-27 21:50:59,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:59,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:59,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964141844] [2020-08-27 21:50:59,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:59,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:59,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:59,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:59,558 INFO L87 Difference]: Start difference. First operand 648 states and 982 transitions. Second operand 3 states. [2020-08-27 21:50:59,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:59,592 INFO L93 Difference]: Finished difference Result 1500 states and 2280 transitions. [2020-08-27 21:50:59,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:59,593 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-27 21:50:59,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:59,598 INFO L225 Difference]: With dead ends: 1500 [2020-08-27 21:50:59,598 INFO L226 Difference]: Without dead ends: 874 [2020-08-27 21:50:59,600 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 [2020-08-27 21:50:59,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2020-08-27 21:50:59,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 872. [2020-08-27 21:50:59,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 872 states. [2020-08-27 21:50:59,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1302 transitions. [2020-08-27 21:50:59,633 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1302 transitions. Word has length 23 [2020-08-27 21:50:59,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:59,634 INFO L479 AbstractCegarLoop]: Abstraction has 872 states and 1302 transitions. [2020-08-27 21:50:59,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:59,634 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1302 transitions. [2020-08-27 21:50:59,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-27 21:50:59,635 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:59,636 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] [2020-08-27 21:50:59,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-27 21:50:59,636 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:59,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:59,637 INFO L82 PathProgramCache]: Analyzing trace with hash 728586230, now seen corresponding path program 1 times [2020-08-27 21:50:59,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:59,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [41948605] [2020-08-27 21:50:59,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:59,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:59,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:59,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:59,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:59,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [41948605] [2020-08-27 21:50:59,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:59,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:59,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228065083] [2020-08-27 21:50:59,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:59,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:59,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:59,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:59,672 INFO L87 Difference]: Start difference. First operand 872 states and 1302 transitions. Second operand 3 states. [2020-08-27 21:50:59,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:59,704 INFO L93 Difference]: Finished difference Result 1308 states and 1944 transitions. [2020-08-27 21:50:59,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:59,705 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-27 21:50:59,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:59,710 INFO L225 Difference]: With dead ends: 1308 [2020-08-27 21:50:59,710 INFO L226 Difference]: Without dead ends: 890 [2020-08-27 21:50:59,713 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 [2020-08-27 21:50:59,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2020-08-27 21:50:59,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 888. [2020-08-27 21:50:59,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 888 states. [2020-08-27 21:50:59,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1302 transitions. [2020-08-27 21:50:59,764 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1302 transitions. Word has length 24 [2020-08-27 21:50:59,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:59,764 INFO L479 AbstractCegarLoop]: Abstraction has 888 states and 1302 transitions. [2020-08-27 21:50:59,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:59,764 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1302 transitions. [2020-08-27 21:50:59,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-27 21:50:59,769 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:59,770 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] [2020-08-27 21:50:59,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-27 21:50:59,770 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:59,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:59,770 INFO L82 PathProgramCache]: Analyzing trace with hash 141780216, now seen corresponding path program 1 times [2020-08-27 21:50:59,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:59,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100134956] [2020-08-27 21:50:59,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:59,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:59,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:59,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:59,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:59,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2100134956] [2020-08-27 21:50:59,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:59,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:59,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279006199] [2020-08-27 21:50:59,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:59,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:59,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:59,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:59,802 INFO L87 Difference]: Start difference. First operand 888 states and 1302 transitions. Second operand 3 states. [2020-08-27 21:50:59,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:59,832 INFO L93 Difference]: Finished difference Result 1548 states and 2312 transitions. [2020-08-27 21:50:59,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:59,833 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-27 21:50:59,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:59,840 INFO L225 Difference]: With dead ends: 1548 [2020-08-27 21:50:59,840 INFO L226 Difference]: Without dead ends: 1546 [2020-08-27 21:50:59,841 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 [2020-08-27 21:50:59,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2020-08-27 21:50:59,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1288. [2020-08-27 21:50:59,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1288 states. [2020-08-27 21:50:59,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 1830 transitions. [2020-08-27 21:50:59,878 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 1830 transitions. Word has length 24 [2020-08-27 21:50:59,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:59,878 INFO L479 AbstractCegarLoop]: Abstraction has 1288 states and 1830 transitions. [2020-08-27 21:50:59,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:59,878 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 1830 transitions. [2020-08-27 21:50:59,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-27 21:50:59,880 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:59,880 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] [2020-08-27 21:50:59,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-27 21:50:59,881 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:59,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:59,881 INFO L82 PathProgramCache]: Analyzing trace with hash 399945654, now seen corresponding path program 1 times [2020-08-27 21:50:59,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:59,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [76147135] [2020-08-27 21:50:59,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:59,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:59,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:59,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:59,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:59,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [76147135] [2020-08-27 21:50:59,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:59,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:59,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892724270] [2020-08-27 21:50:59,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:59,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:59,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:59,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:59,910 INFO L87 Difference]: Start difference. First operand 1288 states and 1830 transitions. Second operand 3 states. [2020-08-27 21:50:59,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:59,954 INFO L93 Difference]: Finished difference Result 2956 states and 4200 transitions. [2020-08-27 21:50:59,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:59,955 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-27 21:50:59,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:59,964 INFO L225 Difference]: With dead ends: 2956 [2020-08-27 21:50:59,964 INFO L226 Difference]: Without dead ends: 1706 [2020-08-27 21:50:59,967 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 [2020-08-27 21:50:59,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1706 states. [2020-08-27 21:51:00,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1706 to 1704. [2020-08-27 21:51:00,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1704 states. [2020-08-27 21:51:00,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1704 states to 1704 states and 2374 transitions. [2020-08-27 21:51:00,021 INFO L78 Accepts]: Start accepts. Automaton has 1704 states and 2374 transitions. Word has length 24 [2020-08-27 21:51:00,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:51:00,021 INFO L479 AbstractCegarLoop]: Abstraction has 1704 states and 2374 transitions. [2020-08-27 21:51:00,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:51:00,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1704 states and 2374 transitions. [2020-08-27 21:51:00,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-27 21:51:00,024 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:51:00,024 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] [2020-08-27 21:51:00,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-27 21:51:00,024 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:51:00,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:51:00,025 INFO L82 PathProgramCache]: Analyzing trace with hash 100434809, now seen corresponding path program 1 times [2020-08-27 21:51:00,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:51:00,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1382733556] [2020-08-27 21:51:00,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:51:00,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:00,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:51:00,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:00,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:51:00,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1382733556] [2020-08-27 21:51:00,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:51:00,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:51:00,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627471405] [2020-08-27 21:51:00,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:51:00,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:51:00,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:51:00,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:51:00,054 INFO L87 Difference]: Start difference. First operand 1704 states and 2374 transitions. Second operand 3 states. [2020-08-27 21:51:00,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:51:00,107 INFO L93 Difference]: Finished difference Result 2556 states and 3544 transitions. [2020-08-27 21:51:00,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:51:00,108 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-27 21:51:00,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:51:00,119 INFO L225 Difference]: With dead ends: 2556 [2020-08-27 21:51:00,120 INFO L226 Difference]: Without dead ends: 1738 [2020-08-27 21:51:00,123 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 [2020-08-27 21:51:00,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2020-08-27 21:51:00,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1736. [2020-08-27 21:51:00,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1736 states. [2020-08-27 21:51:00,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 2374 transitions. [2020-08-27 21:51:00,200 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 2374 transitions. Word has length 25 [2020-08-27 21:51:00,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:51:00,200 INFO L479 AbstractCegarLoop]: Abstraction has 1736 states and 2374 transitions. [2020-08-27 21:51:00,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:51:00,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 2374 transitions. [2020-08-27 21:51:00,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-27 21:51:00,203 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:51:00,203 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:51:00,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-27 21:51:00,204 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:51:00,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:51:00,204 INFO L82 PathProgramCache]: Analyzing trace with hash -486371205, now seen corresponding path program 1 times [2020-08-27 21:51:00,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:51:00,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702127391] [2020-08-27 21:51:00,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:51:00,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:00,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:51:00,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:00,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:51:00,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702127391] [2020-08-27 21:51:00,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:51:00,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:51:00,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110743285] [2020-08-27 21:51:00,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:51:00,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:51:00,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:51:00,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:51:00,236 INFO L87 Difference]: Start difference. First operand 1736 states and 2374 transitions. Second operand 3 states. [2020-08-27 21:51:00,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:51:00,313 INFO L93 Difference]: Finished difference Result 2956 states and 4104 transitions. [2020-08-27 21:51:00,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:51:00,314 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-27 21:51:00,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:51:00,333 INFO L225 Difference]: With dead ends: 2956 [2020-08-27 21:51:00,334 INFO L226 Difference]: Without dead ends: 2954 [2020-08-27 21:51:00,335 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 [2020-08-27 21:51:00,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2020-08-27 21:51:00,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2568. [2020-08-27 21:51:00,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2568 states. [2020-08-27 21:51:00,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 3398 transitions. [2020-08-27 21:51:00,468 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 3398 transitions. Word has length 25 [2020-08-27 21:51:00,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:51:00,468 INFO L479 AbstractCegarLoop]: Abstraction has 2568 states and 3398 transitions. [2020-08-27 21:51:00,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:51:00,468 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 3398 transitions. [2020-08-27 21:51:00,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-27 21:51:00,472 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:51:00,473 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] [2020-08-27 21:51:00,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-27 21:51:00,473 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:51:00,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:51:00,473 INFO L82 PathProgramCache]: Analyzing trace with hash -228205767, now seen corresponding path program 1 times [2020-08-27 21:51:00,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:51:00,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [373336502] [2020-08-27 21:51:00,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:51:00,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:00,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:51:00,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:00,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:51:00,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [373336502] [2020-08-27 21:51:00,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:51:00,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:51:00,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499767575] [2020-08-27 21:51:00,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:51:00,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:51:00,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:51:00,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:51:00,501 INFO L87 Difference]: Start difference. First operand 2568 states and 3398 transitions. Second operand 3 states. [2020-08-27 21:51:00,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:51:00,573 INFO L93 Difference]: Finished difference Result 5836 states and 7688 transitions. [2020-08-27 21:51:00,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:51:00,574 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-27 21:51:00,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:51:00,590 INFO L225 Difference]: With dead ends: 5836 [2020-08-27 21:51:00,591 INFO L226 Difference]: Without dead ends: 3338 [2020-08-27 21:51:00,596 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 [2020-08-27 21:51:00,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2020-08-27 21:51:00,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 3336. [2020-08-27 21:51:00,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3336 states. [2020-08-27 21:51:00,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3336 states to 3336 states and 4294 transitions. [2020-08-27 21:51:00,706 INFO L78 Accepts]: Start accepts. Automaton has 3336 states and 4294 transitions. Word has length 25 [2020-08-27 21:51:00,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:51:00,707 INFO L479 AbstractCegarLoop]: Abstraction has 3336 states and 4294 transitions. [2020-08-27 21:51:00,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:51:00,707 INFO L276 IsEmpty]: Start isEmpty. Operand 3336 states and 4294 transitions. [2020-08-27 21:51:00,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-27 21:51:00,711 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:51:00,712 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] [2020-08-27 21:51:00,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-27 21:51:00,712 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:51:00,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:51:00,712 INFO L82 PathProgramCache]: Analyzing trace with hash 2102577579, now seen corresponding path program 1 times [2020-08-27 21:51:00,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:51:00,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [391719797] [2020-08-27 21:51:00,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:51:00,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:00,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:51:00,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:00,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:51:00,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [391719797] [2020-08-27 21:51:00,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:51:00,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:51:00,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316766540] [2020-08-27 21:51:00,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:51:00,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:51:00,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:51:00,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:51:00,739 INFO L87 Difference]: Start difference. First operand 3336 states and 4294 transitions. Second operand 3 states. [2020-08-27 21:51:00,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:51:00,801 INFO L93 Difference]: Finished difference Result 5004 states and 6408 transitions. [2020-08-27 21:51:00,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:51:00,802 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-27 21:51:00,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:51:00,817 INFO L225 Difference]: With dead ends: 5004 [2020-08-27 21:51:00,817 INFO L226 Difference]: Without dead ends: 3402 [2020-08-27 21:51:00,821 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 [2020-08-27 21:51:00,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3402 states. [2020-08-27 21:51:00,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3402 to 3400. [2020-08-27 21:51:00,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3400 states. [2020-08-27 21:51:00,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3400 states to 3400 states and 4294 transitions. [2020-08-27 21:51:00,947 INFO L78 Accepts]: Start accepts. Automaton has 3400 states and 4294 transitions. Word has length 26 [2020-08-27 21:51:00,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:51:00,948 INFO L479 AbstractCegarLoop]: Abstraction has 3400 states and 4294 transitions. [2020-08-27 21:51:00,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:51:00,949 INFO L276 IsEmpty]: Start isEmpty. Operand 3400 states and 4294 transitions. [2020-08-27 21:51:00,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-27 21:51:00,953 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:51:00,953 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] [2020-08-27 21:51:00,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-27 21:51:00,954 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:51:00,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:51:00,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1515771565, now seen corresponding path program 1 times [2020-08-27 21:51:00,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:51:00,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1489951365] [2020-08-27 21:51:00,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:51:00,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:00,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:51:00,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:00,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:51:00,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1489951365] [2020-08-27 21:51:00,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:51:00,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:51:00,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326113626] [2020-08-27 21:51:00,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:51:00,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:51:00,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:51:00,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:51:00,990 INFO L87 Difference]: Start difference. First operand 3400 states and 4294 transitions. Second operand 3 states. [2020-08-27 21:51:01,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:51:01,098 INFO L93 Difference]: Finished difference Result 9804 states and 12104 transitions. [2020-08-27 21:51:01,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:51:01,098 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-27 21:51:01,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:51:01,128 INFO L225 Difference]: With dead ends: 9804 [2020-08-27 21:51:01,129 INFO L226 Difference]: Without dead ends: 6538 [2020-08-27 21:51:01,137 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 [2020-08-27 21:51:01,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6538 states. [2020-08-27 21:51:01,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6538 to 6536. [2020-08-27 21:51:01,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6536 states. [2020-08-27 21:51:01,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 7814 transitions. [2020-08-27 21:51:01,337 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 7814 transitions. Word has length 26 [2020-08-27 21:51:01,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:51:01,338 INFO L479 AbstractCegarLoop]: Abstraction has 6536 states and 7814 transitions. [2020-08-27 21:51:01,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:51:01,338 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 7814 transitions. [2020-08-27 21:51:01,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-27 21:51:01,346 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:51:01,347 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] [2020-08-27 21:51:01,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-27 21:51:01,347 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:51:01,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:51:01,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1257606127, now seen corresponding path program 1 times [2020-08-27 21:51:01,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:51:01,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1175962840] [2020-08-27 21:51:01,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:51:01,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:01,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:51:01,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:01,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:51:01,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1175962840] [2020-08-27 21:51:01,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:51:01,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:51:01,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010576084] [2020-08-27 21:51:01,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:51:01,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:51:01,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:51:01,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:51:01,377 INFO L87 Difference]: Start difference. First operand 6536 states and 7814 transitions. Second operand 3 states. [2020-08-27 21:51:01,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:51:01,560 INFO L93 Difference]: Finished difference Result 7052 states and 8584 transitions. [2020-08-27 21:51:01,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:51:01,561 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-27 21:51:01,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:51:01,591 INFO L225 Difference]: With dead ends: 7052 [2020-08-27 21:51:01,592 INFO L226 Difference]: Without dead ends: 7050 [2020-08-27 21:51:01,594 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 [2020-08-27 21:51:01,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7050 states. [2020-08-27 21:51:01,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7050 to 6536. [2020-08-27 21:51:01,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6536 states. [2020-08-27 21:51:01,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 7686 transitions. [2020-08-27 21:51:01,771 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 7686 transitions. Word has length 26 [2020-08-27 21:51:01,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:51:01,772 INFO L479 AbstractCegarLoop]: Abstraction has 6536 states and 7686 transitions. [2020-08-27 21:51:01,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:51:01,772 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 7686 transitions. [2020-08-27 21:51:01,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-27 21:51:01,781 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:51:01,782 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] [2020-08-27 21:51:01,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-27 21:51:01,782 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:51:01,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:51:01,782 INFO L82 PathProgramCache]: Analyzing trace with hash -255505650, now seen corresponding path program 1 times [2020-08-27 21:51:01,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:51:01,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202555767] [2020-08-27 21:51:01,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:51:01,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:01,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:51:01,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:01,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:51:01,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202555767] [2020-08-27 21:51:01,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:51:01,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:51:01,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645837885] [2020-08-27 21:51:01,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:51:01,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:51:01,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:51:01,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:51:01,816 INFO L87 Difference]: Start difference. First operand 6536 states and 7686 transitions. Second operand 3 states. [2020-08-27 21:51:01,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:51:01,993 INFO L93 Difference]: Finished difference Result 10634 states and 12423 transitions. [2020-08-27 21:51:01,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:51:01,993 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-27 21:51:01,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:51:02,019 INFO L225 Difference]: With dead ends: 10634 [2020-08-27 21:51:02,019 INFO L226 Difference]: Without dead ends: 10632 [2020-08-27 21:51:02,024 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 [2020-08-27 21:51:02,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10632 states. [2020-08-27 21:51:02,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10632 to 10120. [2020-08-27 21:51:02,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10120 states. [2020-08-27 21:51:02,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10120 states to 10120 states and 11654 transitions. [2020-08-27 21:51:02,312 INFO L78 Accepts]: Start accepts. Automaton has 10120 states and 11654 transitions. Word has length 27 [2020-08-27 21:51:02,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:51:02,312 INFO L479 AbstractCegarLoop]: Abstraction has 10120 states and 11654 transitions. [2020-08-27 21:51:02,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:51:02,312 INFO L276 IsEmpty]: Start isEmpty. Operand 10120 states and 11654 transitions. [2020-08-27 21:51:02,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-27 21:51:02,332 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:51:02,332 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:51:02,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-27 21:51:02,333 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:51:02,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:51:02,333 INFO L82 PathProgramCache]: Analyzing trace with hash 2659788, now seen corresponding path program 1 times [2020-08-27 21:51:02,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:51:02,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090747024] [2020-08-27 21:51:02,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:51:02,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:02,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:51:02,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:51:02,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:51:02,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090747024] [2020-08-27 21:51:02,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:51:02,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:51:02,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309094947] [2020-08-27 21:51:02,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:51:02,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:51:02,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:51:02,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:51:02,363 INFO L87 Difference]: Start difference. First operand 10120 states and 11654 transitions. Second operand 3 states. [2020-08-27 21:51:02,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:51:02,558 INFO L93 Difference]: Finished difference Result 22664 states and 25734 transitions. [2020-08-27 21:51:02,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:51:02,559 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-27 21:51:02,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:51:02,559 INFO L225 Difference]: With dead ends: 22664 [2020-08-27 21:51:02,559 INFO L226 Difference]: Without dead ends: 0 [2020-08-27 21:51:02,592 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 [2020-08-27 21:51:02,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-27 21:51:02,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-27 21:51:02,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-27 21:51:02,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-27 21:51:02,593 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2020-08-27 21:51:02,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:51:02,593 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-27 21:51:02,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:51:02,593 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-27 21:51:02,593 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-27 21:51:02,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-27 21:51:02,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-27 21:51:02,623 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-27 21:51:02,623 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-27 21:51:02,623 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-27 21:51:02,623 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-27 21:51:02,624 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-27 21:51:02,624 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-27 21:51:02,624 INFO L268 CegarLoopResult]: For program point L93-1(lines 36 144) no Hoare annotation was computed. [2020-08-27 21:51:02,624 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 149) no Hoare annotation was computed. [2020-08-27 21:51:02,624 INFO L268 CegarLoopResult]: For program point L85-1(lines 36 144) no Hoare annotation was computed. [2020-08-27 21:51:02,624 INFO L268 CegarLoopResult]: For program point L110(line 110) no Hoare annotation was computed. [2020-08-27 21:51:02,624 INFO L268 CegarLoopResult]: For program point L77-1(lines 36 144) no Hoare annotation was computed. [2020-08-27 21:51:02,624 INFO L268 CegarLoopResult]: For program point L135(line 135) no Hoare annotation was computed. [2020-08-27 21:51:02,625 INFO L268 CegarLoopResult]: For program point L69-1(lines 36 144) no Hoare annotation was computed. [2020-08-27 21:51:02,625 INFO L268 CegarLoopResult]: For program point L61(lines 61 63) no Hoare annotation was computed. [2020-08-27 21:51:02,625 INFO L268 CegarLoopResult]: For program point L61-2(lines 36 144) no Hoare annotation was computed. [2020-08-27 21:51:02,625 INFO L268 CegarLoopResult]: For program point L119-1(lines 36 144) no Hoare annotation was computed. [2020-08-27 21:51:02,625 INFO L268 CegarLoopResult]: For program point L120(line 120) no Hoare annotation was computed. [2020-08-27 21:51:02,625 INFO L271 CegarLoopResult]: At program point L145(lines 5 149) the Hoare annotation is: true [2020-08-27 21:51:02,625 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 149) no Hoare annotation was computed. [2020-08-27 21:51:02,625 INFO L268 CegarLoopResult]: For program point L104-1(lines 36 144) no Hoare annotation was computed. [2020-08-27 21:51:02,626 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-08-27 21:51:02,626 INFO L268 CegarLoopResult]: For program point L129-1(lines 36 144) no Hoare annotation was computed. [2020-08-27 21:51:02,626 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 147) no Hoare annotation was computed. [2020-08-27 21:51:02,626 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 149) the Hoare annotation is: true [2020-08-27 21:51:02,626 INFO L268 CegarLoopResult]: For program point L105(line 105) no Hoare annotation was computed. [2020-08-27 21:51:02,626 INFO L268 CegarLoopResult]: For program point L130(line 130) no Hoare annotation was computed. [2020-08-27 21:51:02,627 INFO L268 CegarLoopResult]: For program point L89-1(lines 36 144) no Hoare annotation was computed. [2020-08-27 21:51:02,627 INFO L268 CegarLoopResult]: For program point L114-1(lines 36 144) no Hoare annotation was computed. [2020-08-27 21:51:02,627 INFO L268 CegarLoopResult]: For program point L81-1(lines 36 144) no Hoare annotation was computed. [2020-08-27 21:51:02,627 INFO L271 CegarLoopResult]: At program point L139-1(lines 36 144) the Hoare annotation is: true [2020-08-27 21:51:02,627 INFO L268 CegarLoopResult]: For program point L73-1(lines 36 144) no Hoare annotation was computed. [2020-08-27 21:51:02,627 INFO L268 CegarLoopResult]: For program point L65-1(lines 36 144) no Hoare annotation was computed. [2020-08-27 21:51:02,627 INFO L268 CegarLoopResult]: For program point L115(line 115) no Hoare annotation was computed. [2020-08-27 21:51:02,627 INFO L268 CegarLoopResult]: For program point L140(line 140) no Hoare annotation was computed. [2020-08-27 21:51:02,627 INFO L264 CegarLoopResult]: At program point L140-1(lines 5 149) the Hoare annotation is: false [2020-08-27 21:51:02,628 INFO L268 CegarLoopResult]: For program point L99-1(lines 36 144) no Hoare annotation was computed. [2020-08-27 21:51:02,628 INFO L268 CegarLoopResult]: For program point L124-1(lines 36 144) no Hoare annotation was computed. [2020-08-27 21:51:02,628 INFO L268 CegarLoopResult]: For program point L100(line 100) no Hoare annotation was computed. [2020-08-27 21:51:02,628 INFO L268 CegarLoopResult]: For program point L125(line 125) no Hoare annotation was computed. [2020-08-27 21:51:02,628 INFO L268 CegarLoopResult]: For program point L109-1(lines 36 144) no Hoare annotation was computed. [2020-08-27 21:51:02,628 INFO L268 CegarLoopResult]: For program point L134-1(lines 36 144) no Hoare annotation was computed. [2020-08-27 21:51:02,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 09:51:02 BoogieIcfgContainer [2020-08-27 21:51:02,643 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-27 21:51:02,646 INFO L168 Benchmark]: Toolchain (without parser) took 6006.25 ms. Allocated memory was 140.5 MB in the beginning and 361.2 MB in the end (delta: 220.7 MB). Free memory was 103.6 MB in the beginning and 158.6 MB in the end (delta: -54.9 MB). Peak memory consumption was 165.8 MB. Max. memory is 7.1 GB. [2020-08-27 21:51:02,647 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.6 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-08-27 21:51:02,647 INFO L168 Benchmark]: CACSL2BoogieTranslator took 349.46 ms. Allocated memory is still 140.5 MB. Free memory was 103.6 MB in the beginning and 93.2 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-08-27 21:51:02,648 INFO L168 Benchmark]: Boogie Preprocessor took 121.49 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 92.8 MB in the beginning and 180.9 MB in the end (delta: -88.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-08-27 21:51:02,648 INFO L168 Benchmark]: RCFGBuilder took 390.38 ms. Allocated memory is still 203.4 MB. Free memory was 180.9 MB in the beginning and 162.8 MB in the end (delta: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 7.1 GB. [2020-08-27 21:51:02,649 INFO L168 Benchmark]: TraceAbstraction took 5136.80 ms. Allocated memory was 203.4 MB in the beginning and 361.2 MB in the end (delta: 157.8 MB). Free memory was 161.8 MB in the beginning and 158.6 MB in the end (delta: 3.2 MB). Peak memory consumption was 161.1 MB. Max. memory is 7.1 GB. [2020-08-27 21:51:02,652 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.6 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 349.46 ms. Allocated memory is still 140.5 MB. Free memory was 103.6 MB in the beginning and 93.2 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 121.49 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 92.8 MB in the beginning and 180.9 MB in the end (delta: -88.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 390.38 ms. Allocated memory is still 203.4 MB. Free memory was 180.9 MB in the beginning and 162.8 MB in the end (delta: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5136.80 ms. Allocated memory was 203.4 MB in the beginning and 361.2 MB in the end (delta: 157.8 MB). Free memory was 161.8 MB in the beginning and 158.6 MB in the end (delta: 3.2 MB). Peak memory consumption was 161.1 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: 4.9s, OverallIterations: 25, TraceHistogramMax: 1, AutomataDifference: 1.8s, 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: 1.5s 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, 0.3s SatisfiabilityAnalysisTime, 0.7s 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...