/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_5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 10:20:37,906 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:20:37,910 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:20:37,936 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:20:37,936 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:20:37,938 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:20:37,939 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:20:37,941 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:20:37,943 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:20:37,944 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:20:37,945 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:20:37,946 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:20:37,947 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:20:37,948 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:20:37,949 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:20:37,951 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:20:37,952 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:20:37,953 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:20:37,954 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:20:37,956 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:20:37,958 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:20:37,959 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:20:37,960 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:20:37,961 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:20:37,964 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-21 10:20:37,978 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:20:37,979 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:20:37,981 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:20:37,982 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 [2020-09-21 10:20:38,041 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:20:38,041 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:20:38,043 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:20:38,043 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:20:38,044 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:20:38,044 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:20:38,045 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:20:38,045 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:20:38,045 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:20:38,045 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:20:38,045 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:20:38,046 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:20:38,047 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:20:38,047 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:20:38,047 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:20:38,047 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:20:38,047 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:20:38,048 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:20:38,048 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:20:38,048 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:20:38,048 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:20:38,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:20:38,049 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:20:38,049 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:20:38,050 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:20:38,050 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:20:38,050 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:20:38,050 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:20:38,050 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:20:38,051 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 [2020-09-21 10:20:38,513 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:20:38,536 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:20:38,542 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:20:38,544 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:20:38,545 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:20:38,546 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_5.c [2020-09-21 10:20:38,636 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fb36e5d7e/23e4358bbd47420ba3e4d9e066e4a2ad/FLAG47f612e57 [2020-09-21 10:20:39,217 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:20:39,218 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_5.c [2020-09-21 10:20:39,227 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fb36e5d7e/23e4358bbd47420ba3e4d9e066e4a2ad/FLAG47f612e57 [2020-09-21 10:20:39,537 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fb36e5d7e/23e4358bbd47420ba3e4d9e066e4a2ad [2020-09-21 10:20:39,552 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:20:39,558 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:20:39,559 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:20:39,560 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:20:39,564 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:20:39,565 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:20:39" (1/1) ... [2020-09-21 10:20:39,569 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ab12f38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:39, skipping insertion in model container [2020-09-21 10:20:39,569 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:20:39" (1/1) ... [2020-09-21 10:20:39,578 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:20:39,605 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:20:39,823 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:20:39,828 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:20:39,854 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:20:39,871 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:20:39,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:39 WrapperNode [2020-09-21 10:20:39,871 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:20:39,872 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:20:39,872 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:20:39,873 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:20:39,890 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:39" (1/1) ... [2020-09-21 10:20:39,890 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:39" (1/1) ... [2020-09-21 10:20:39,980 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:39" (1/1) ... [2020-09-21 10:20:39,980 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:39" (1/1) ... [2020-09-21 10:20:39,986 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:39" (1/1) ... [2020-09-21 10:20:39,993 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:39" (1/1) ... [2020-09-21 10:20:40,000 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:39" (1/1) ... [2020-09-21 10:20:40,002 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:20:40,003 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:20:40,003 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:20:40,003 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:20:40,004 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:39" (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 [2020-09-21 10:20:40,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:20:40,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:20:40,101 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:20:40,102 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:20:40,102 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 10:20:40,103 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:20:40,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:20:40,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:20:40,375 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:20:40,376 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-21 10:20:40,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:20:40 BoogieIcfgContainer [2020-09-21 10:20:40,382 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:20:40,384 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:20:40,384 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:20:40,388 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:20:40,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:20:39" (1/3) ... [2020-09-21 10:20:40,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@789fb327 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:20:40, skipping insertion in model container [2020-09-21 10:20:40,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:39" (2/3) ... [2020-09-21 10:20:40,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@789fb327 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:20:40, skipping insertion in model container [2020-09-21 10:20:40,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:20:40" (3/3) ... [2020-09-21 10:20:40,392 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_5.c [2020-09-21 10:20:40,406 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:20:40,421 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:20:40,479 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:20:40,517 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:20:40,518 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:20:40,518 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:20:40,518 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:20:40,518 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:20:40,519 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:20:40,519 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:20:40,519 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:20:40,540 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-09-21 10:20:40,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-21 10:20:40,549 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:40,550 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:40,551 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:40,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:40,559 INFO L82 PathProgramCache]: Analyzing trace with hash 316328318, now seen corresponding path program 1 times [2020-09-21 10:20:40,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:40,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2051924822] [2020-09-21 10:20:40,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:40,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:40,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:40,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:40,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:40,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2051924822] [2020-09-21 10:20:40,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:40,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:40,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839005025] [2020-09-21 10:20:40,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:40,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:40,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:40,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:40,802 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-09-21 10:20:40,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:40,910 INFO L93 Difference]: Finished difference Result 57 states and 90 transitions. [2020-09-21 10:20:40,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:40,913 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-09-21 10:20:40,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:40,927 INFO L225 Difference]: With dead ends: 57 [2020-09-21 10:20:40,928 INFO L226 Difference]: Without dead ends: 42 [2020-09-21 10:20:40,932 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 [2020-09-21 10:20:40,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-21 10:20:40,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 30. [2020-09-21 10:20:40,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-21 10:20:40,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 49 transitions. [2020-09-21 10:20:40,982 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 49 transitions. Word has length 15 [2020-09-21 10:20:40,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:40,983 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 49 transitions. [2020-09-21 10:20:40,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:40,983 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 49 transitions. [2020-09-21 10:20:40,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-21 10:20:40,984 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:40,984 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:40,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:20:40,985 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:40,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:40,986 INFO L82 PathProgramCache]: Analyzing trace with hash -493018308, now seen corresponding path program 1 times [2020-09-21 10:20:40,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:40,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [318456776] [2020-09-21 10:20:40,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:41,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:41,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:41,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:41,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:41,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [318456776] [2020-09-21 10:20:41,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:41,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:41,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290826294] [2020-09-21 10:20:41,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:41,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:41,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:41,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:41,051 INFO L87 Difference]: Start difference. First operand 30 states and 49 transitions. Second operand 3 states. [2020-09-21 10:20:41,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:41,075 INFO L93 Difference]: Finished difference Result 67 states and 112 transitions. [2020-09-21 10:20:41,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:41,076 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-09-21 10:20:41,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:41,077 INFO L225 Difference]: With dead ends: 67 [2020-09-21 10:20:41,078 INFO L226 Difference]: Without dead ends: 42 [2020-09-21 10:20:41,079 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 [2020-09-21 10:20:41,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-21 10:20:41,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-09-21 10:20:41,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-21 10:20:41,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 65 transitions. [2020-09-21 10:20:41,090 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 65 transitions. Word has length 15 [2020-09-21 10:20:41,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:41,091 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 65 transitions. [2020-09-21 10:20:41,091 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:41,091 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 65 transitions. [2020-09-21 10:20:41,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-21 10:20:41,092 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:41,092 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:41,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:20:41,092 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:41,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:41,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1216458266, now seen corresponding path program 1 times [2020-09-21 10:20:41,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:41,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683908486] [2020-09-21 10:20:41,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:41,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:41,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:41,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:41,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:41,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [683908486] [2020-09-21 10:20:41,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:41,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:41,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462321693] [2020-09-21 10:20:41,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:41,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:41,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:41,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:41,153 INFO L87 Difference]: Start difference. First operand 40 states and 65 transitions. Second operand 3 states. [2020-09-21 10:20:41,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:41,187 INFO L93 Difference]: Finished difference Result 63 states and 99 transitions. [2020-09-21 10:20:41,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:41,188 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-09-21 10:20:41,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:41,190 INFO L225 Difference]: With dead ends: 63 [2020-09-21 10:20:41,190 INFO L226 Difference]: Without dead ends: 45 [2020-09-21 10:20:41,191 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 [2020-09-21 10:20:41,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-09-21 10:20:41,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2020-09-21 10:20:41,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-21 10:20:41,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 67 transitions. [2020-09-21 10:20:41,200 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 67 transitions. Word has length 16 [2020-09-21 10:20:41,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:41,201 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 67 transitions. [2020-09-21 10:20:41,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:41,201 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 67 transitions. [2020-09-21 10:20:41,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-21 10:20:41,202 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:41,202 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:41,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 10:20:41,203 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:41,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:41,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1896516636, now seen corresponding path program 1 times [2020-09-21 10:20:41,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:41,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975082123] [2020-09-21 10:20:41,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:41,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:41,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:41,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:41,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:41,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975082123] [2020-09-21 10:20:41,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:41,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:41,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712503308] [2020-09-21 10:20:41,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:41,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:41,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:41,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:41,251 INFO L87 Difference]: Start difference. First operand 43 states and 67 transitions. Second operand 3 states. [2020-09-21 10:20:41,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:41,273 INFO L93 Difference]: Finished difference Result 76 states and 120 transitions. [2020-09-21 10:20:41,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:41,274 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-09-21 10:20:41,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:41,275 INFO L225 Difference]: With dead ends: 76 [2020-09-21 10:20:41,276 INFO L226 Difference]: Without dead ends: 74 [2020-09-21 10:20:41,277 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 [2020-09-21 10:20:41,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-09-21 10:20:41,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 56. [2020-09-21 10:20:41,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-21 10:20:41,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 88 transitions. [2020-09-21 10:20:41,287 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 88 transitions. Word has length 16 [2020-09-21 10:20:41,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:41,288 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 88 transitions. [2020-09-21 10:20:41,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:41,288 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 88 transitions. [2020-09-21 10:20:41,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-21 10:20:41,289 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:41,289 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:41,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 10:20:41,290 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:41,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:41,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1087170010, now seen corresponding path program 1 times [2020-09-21 10:20:41,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:41,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338385271] [2020-09-21 10:20:41,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:41,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:41,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:41,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:41,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:41,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1338385271] [2020-09-21 10:20:41,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:41,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:41,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028995887] [2020-09-21 10:20:41,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:41,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:41,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:41,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:41,330 INFO L87 Difference]: Start difference. First operand 56 states and 88 transitions. Second operand 3 states. [2020-09-21 10:20:41,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:41,352 INFO L93 Difference]: Finished difference Result 124 states and 198 transitions. [2020-09-21 10:20:41,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:41,353 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-09-21 10:20:41,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:41,354 INFO L225 Difference]: With dead ends: 124 [2020-09-21 10:20:41,355 INFO L226 Difference]: Without dead ends: 76 [2020-09-21 10:20:41,357 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 [2020-09-21 10:20:41,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-21 10:20:41,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2020-09-21 10:20:41,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-21 10:20:41,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 114 transitions. [2020-09-21 10:20:41,369 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 114 transitions. Word has length 16 [2020-09-21 10:20:41,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:41,369 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 114 transitions. [2020-09-21 10:20:41,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:41,369 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 114 transitions. [2020-09-21 10:20:41,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-21 10:20:41,370 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:41,372 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:41,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 10:20:41,372 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:41,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:41,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1337311087, now seen corresponding path program 1 times [2020-09-21 10:20:41,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:41,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [67007638] [2020-09-21 10:20:41,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:41,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:41,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:41,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:41,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:41,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [67007638] [2020-09-21 10:20:41,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:41,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:41,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236142821] [2020-09-21 10:20:41,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:41,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:41,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:41,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:41,410 INFO L87 Difference]: Start difference. First operand 74 states and 114 transitions. Second operand 3 states. [2020-09-21 10:20:41,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:41,428 INFO L93 Difference]: Finished difference Result 111 states and 169 transitions. [2020-09-21 10:20:41,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:41,429 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-09-21 10:20:41,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:41,430 INFO L225 Difference]: With dead ends: 111 [2020-09-21 10:20:41,430 INFO L226 Difference]: Without dead ends: 78 [2020-09-21 10:20:41,431 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 [2020-09-21 10:20:41,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-21 10:20:41,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-09-21 10:20:41,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-21 10:20:41,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 114 transitions. [2020-09-21 10:20:41,444 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 114 transitions. Word has length 17 [2020-09-21 10:20:41,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:41,445 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 114 transitions. [2020-09-21 10:20:41,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:41,445 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 114 transitions. [2020-09-21 10:20:41,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-21 10:20:41,446 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:41,446 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:41,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 10:20:41,448 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:41,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:41,448 INFO L82 PathProgramCache]: Analyzing trace with hash -657252717, now seen corresponding path program 1 times [2020-09-21 10:20:41,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:41,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1441571891] [2020-09-21 10:20:41,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:41,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:41,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:41,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:41,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:41,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1441571891] [2020-09-21 10:20:41,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:41,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:41,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586755961] [2020-09-21 10:20:41,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:41,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:41,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:41,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:41,530 INFO L87 Difference]: Start difference. First operand 76 states and 114 transitions. Second operand 3 states. [2020-09-21 10:20:41,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:41,556 INFO L93 Difference]: Finished difference Result 132 states and 200 transitions. [2020-09-21 10:20:41,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:41,557 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-09-21 10:20:41,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:41,559 INFO L225 Difference]: With dead ends: 132 [2020-09-21 10:20:41,559 INFO L226 Difference]: Without dead ends: 130 [2020-09-21 10:20:41,560 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 [2020-09-21 10:20:41,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-21 10:20:41,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 104. [2020-09-21 10:20:41,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-21 10:20:41,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 154 transitions. [2020-09-21 10:20:41,574 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 154 transitions. Word has length 17 [2020-09-21 10:20:41,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:41,574 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 154 transitions. [2020-09-21 10:20:41,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:41,574 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 154 transitions. [2020-09-21 10:20:41,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-21 10:20:41,576 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:41,576 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:41,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 10:20:41,577 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:41,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:41,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1466599343, now seen corresponding path program 1 times [2020-09-21 10:20:41,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:41,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1183920903] [2020-09-21 10:20:41,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:41,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:41,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:41,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:41,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:41,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1183920903] [2020-09-21 10:20:41,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:41,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:41,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608442803] [2020-09-21 10:20:41,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:41,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:41,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:41,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:41,613 INFO L87 Difference]: Start difference. First operand 104 states and 154 transitions. Second operand 3 states. [2020-09-21 10:20:41,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:41,635 INFO L93 Difference]: Finished difference Result 232 states and 344 transitions. [2020-09-21 10:20:41,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:41,636 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-09-21 10:20:41,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:41,637 INFO L225 Difference]: With dead ends: 232 [2020-09-21 10:20:41,638 INFO L226 Difference]: Without dead ends: 138 [2020-09-21 10:20:41,639 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 [2020-09-21 10:20:41,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-21 10:20:41,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-09-21 10:20:41,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-21 10:20:41,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 194 transitions. [2020-09-21 10:20:41,655 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 194 transitions. Word has length 17 [2020-09-21 10:20:41,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:41,656 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 194 transitions. [2020-09-21 10:20:41,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:41,656 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 194 transitions. [2020-09-21 10:20:41,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-21 10:20:41,657 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:41,658 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:41,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 10:20:41,658 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:41,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:41,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1100217935, now seen corresponding path program 1 times [2020-09-21 10:20:41,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:41,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1705893421] [2020-09-21 10:20:41,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:41,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:41,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:41,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:41,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:41,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1705893421] [2020-09-21 10:20:41,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:41,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:41,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136755664] [2020-09-21 10:20:41,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:41,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:41,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:41,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:41,705 INFO L87 Difference]: Start difference. First operand 136 states and 194 transitions. Second operand 3 states. [2020-09-21 10:20:41,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:41,724 INFO L93 Difference]: Finished difference Result 204 states and 288 transitions. [2020-09-21 10:20:41,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:41,725 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-09-21 10:20:41,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:41,726 INFO L225 Difference]: With dead ends: 204 [2020-09-21 10:20:41,726 INFO L226 Difference]: Without dead ends: 142 [2020-09-21 10:20:41,727 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 [2020-09-21 10:20:41,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-09-21 10:20:41,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2020-09-21 10:20:41,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-21 10:20:41,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 194 transitions. [2020-09-21 10:20:41,741 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 194 transitions. Word has length 18 [2020-09-21 10:20:41,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:41,741 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 194 transitions. [2020-09-21 10:20:41,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:41,741 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 194 transitions. [2020-09-21 10:20:41,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-21 10:20:41,743 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:41,743 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:41,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 10:20:41,744 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:41,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:41,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1780276305, now seen corresponding path program 1 times [2020-09-21 10:20:41,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:41,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45423179] [2020-09-21 10:20:41,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:41,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:41,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:41,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:41,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:41,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45423179] [2020-09-21 10:20:41,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:41,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:41,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711908758] [2020-09-21 10:20:41,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:41,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:41,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:41,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:41,789 INFO L87 Difference]: Start difference. First operand 140 states and 194 transitions. Second operand 3 states. [2020-09-21 10:20:41,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:41,814 INFO L93 Difference]: Finished difference Result 236 states and 328 transitions. [2020-09-21 10:20:41,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:41,815 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-09-21 10:20:41,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:41,817 INFO L225 Difference]: With dead ends: 236 [2020-09-21 10:20:41,817 INFO L226 Difference]: Without dead ends: 234 [2020-09-21 10:20:41,817 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 [2020-09-21 10:20:41,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-09-21 10:20:41,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 200. [2020-09-21 10:20:41,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-09-21 10:20:41,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 270 transitions. [2020-09-21 10:20:41,832 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 270 transitions. Word has length 18 [2020-09-21 10:20:41,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:41,832 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 270 transitions. [2020-09-21 10:20:41,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:41,832 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 270 transitions. [2020-09-21 10:20:41,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-21 10:20:41,834 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:41,834 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:41,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 10:20:41,835 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:41,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:41,835 INFO L82 PathProgramCache]: Analyzing trace with hash 970929679, now seen corresponding path program 1 times [2020-09-21 10:20:41,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:41,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1060037702] [2020-09-21 10:20:41,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:41,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:41,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:41,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:41,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:41,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1060037702] [2020-09-21 10:20:41,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:41,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:41,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577197732] [2020-09-21 10:20:41,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:41,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:41,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:41,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:41,871 INFO L87 Difference]: Start difference. First operand 200 states and 270 transitions. Second operand 3 states. [2020-09-21 10:20:41,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:41,895 INFO L93 Difference]: Finished difference Result 444 states and 592 transitions. [2020-09-21 10:20:41,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:41,896 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-09-21 10:20:41,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:41,898 INFO L225 Difference]: With dead ends: 444 [2020-09-21 10:20:41,898 INFO L226 Difference]: Without dead ends: 258 [2020-09-21 10:20:41,900 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 [2020-09-21 10:20:41,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-09-21 10:20:41,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2020-09-21 10:20:41,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-09-21 10:20:41,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 326 transitions. [2020-09-21 10:20:41,917 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 326 transitions. Word has length 18 [2020-09-21 10:20:41,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:41,918 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 326 transitions. [2020-09-21 10:20:41,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:41,918 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 326 transitions. [2020-09-21 10:20:41,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-21 10:20:41,920 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:41,920 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:41,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 10:20:41,920 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:41,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:41,921 INFO L82 PathProgramCache]: Analyzing trace with hash -645793370, now seen corresponding path program 1 times [2020-09-21 10:20:41,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:41,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1265285653] [2020-09-21 10:20:41,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:41,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:41,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:41,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:41,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:41,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1265285653] [2020-09-21 10:20:41,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:41,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:41,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790927360] [2020-09-21 10:20:41,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:41,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:41,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:41,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:41,959 INFO L87 Difference]: Start difference. First operand 256 states and 326 transitions. Second operand 3 states. [2020-09-21 10:20:41,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:41,982 INFO L93 Difference]: Finished difference Result 384 states and 484 transitions. [2020-09-21 10:20:41,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:41,982 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-09-21 10:20:41,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:41,984 INFO L225 Difference]: With dead ends: 384 [2020-09-21 10:20:41,984 INFO L226 Difference]: Without dead ends: 266 [2020-09-21 10:20:41,985 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 [2020-09-21 10:20:41,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-09-21 10:20:41,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 264. [2020-09-21 10:20:41,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-09-21 10:20:41,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 326 transitions. [2020-09-21 10:20:41,999 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 326 transitions. Word has length 19 [2020-09-21 10:20:42,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:42,000 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 326 transitions. [2020-09-21 10:20:42,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:42,000 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 326 transitions. [2020-09-21 10:20:42,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-21 10:20:42,002 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:42,002 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:42,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-21 10:20:42,002 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:42,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:42,003 INFO L82 PathProgramCache]: Analyzing trace with hash 34265000, now seen corresponding path program 1 times [2020-09-21 10:20:42,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:42,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [929464127] [2020-09-21 10:20:42,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:42,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:42,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:42,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:42,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:42,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [929464127] [2020-09-21 10:20:42,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:42,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:42,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382454609] [2020-09-21 10:20:42,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:42,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:42,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:42,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:42,030 INFO L87 Difference]: Start difference. First operand 264 states and 326 transitions. Second operand 3 states. [2020-09-21 10:20:42,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:42,052 INFO L93 Difference]: Finished difference Result 426 states and 519 transitions. [2020-09-21 10:20:42,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:42,053 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-09-21 10:20:42,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:42,056 INFO L225 Difference]: With dead ends: 426 [2020-09-21 10:20:42,056 INFO L226 Difference]: Without dead ends: 424 [2020-09-21 10:20:42,056 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 [2020-09-21 10:20:42,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2020-09-21 10:20:42,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 392. [2020-09-21 10:20:42,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-09-21 10:20:42,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 470 transitions. [2020-09-21 10:20:42,072 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 470 transitions. Word has length 19 [2020-09-21 10:20:42,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:42,072 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 470 transitions. [2020-09-21 10:20:42,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:42,072 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 470 transitions. [2020-09-21 10:20:42,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-21 10:20:42,075 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:42,075 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:42,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-21 10:20:42,075 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:42,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:42,076 INFO L82 PathProgramCache]: Analyzing trace with hash -775081626, now seen corresponding path program 1 times [2020-09-21 10:20:42,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:42,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2130168092] [2020-09-21 10:20:42,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:42,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:42,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:42,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:42,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:42,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2130168092] [2020-09-21 10:20:42,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:42,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:42,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398395135] [2020-09-21 10:20:42,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:42,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:42,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:42,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:42,109 INFO L87 Difference]: Start difference. First operand 392 states and 470 transitions. Second operand 3 states. [2020-09-21 10:20:42,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:42,140 INFO L93 Difference]: Finished difference Result 856 states and 998 transitions. [2020-09-21 10:20:42,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:42,141 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-09-21 10:20:42,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:42,142 INFO L225 Difference]: With dead ends: 856 [2020-09-21 10:20:42,142 INFO L226 Difference]: Without dead ends: 0 [2020-09-21 10:20:42,145 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 [2020-09-21 10:20:42,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-21 10:20:42,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-21 10:20:42,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-21 10:20:42,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-21 10:20:42,146 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-09-21 10:20:42,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:42,147 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-21 10:20:42,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:42,147 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-21 10:20:42,147 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-21 10:20:42,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-21 10:20:42,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-21 10:20:42,180 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-21 10:20:42,180 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-21 10:20:42,180 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-21 10:20:42,180 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-21 10:20:42,181 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-21 10:20:42,181 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-21 10:20:42,181 INFO L268 CegarLoopResult]: For program point L64(line 64) no Hoare annotation was computed. [2020-09-21 10:20:42,181 INFO L271 CegarLoopResult]: At program point L89(lines 5 93) the Hoare annotation is: true [2020-09-21 10:20:42,181 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 93) no Hoare annotation was computed. [2020-09-21 10:20:42,181 INFO L268 CegarLoopResult]: For program point L73-1(lines 24 88) no Hoare annotation was computed. [2020-09-21 10:20:42,182 INFO L268 CegarLoopResult]: For program point L69(line 69) no Hoare annotation was computed. [2020-09-21 10:20:42,182 INFO L268 CegarLoopResult]: For program point L57-1(lines 24 88) no Hoare annotation was computed. [2020-09-21 10:20:42,182 INFO L268 CegarLoopResult]: For program point L53-1(lines 24 88) no Hoare annotation was computed. [2020-09-21 10:20:42,182 INFO L268 CegarLoopResult]: For program point L49-1(lines 24 88) no Hoare annotation was computed. [2020-09-21 10:20:42,182 INFO L268 CegarLoopResult]: For program point L78-1(lines 24 88) no Hoare annotation was computed. [2020-09-21 10:20:42,182 INFO L268 CegarLoopResult]: For program point L45-1(lines 24 88) no Hoare annotation was computed. [2020-09-21 10:20:42,183 INFO L268 CegarLoopResult]: For program point L74(line 74) no Hoare annotation was computed. [2020-09-21 10:20:42,183 INFO L268 CegarLoopResult]: For program point L41(lines 41 43) no Hoare annotation was computed. [2020-09-21 10:20:42,183 INFO L268 CegarLoopResult]: For program point L41-2(lines 24 88) no Hoare annotation was computed. [2020-09-21 10:20:42,183 INFO L271 CegarLoopResult]: At program point L83-1(lines 24 88) the Hoare annotation is: true [2020-09-21 10:20:42,183 INFO L268 CegarLoopResult]: For program point L79(line 79) no Hoare annotation was computed. [2020-09-21 10:20:42,183 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 93) no Hoare annotation was computed. [2020-09-21 10:20:42,184 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 91) no Hoare annotation was computed. [2020-09-21 10:20:42,184 INFO L268 CegarLoopResult]: For program point L63-1(lines 24 88) no Hoare annotation was computed. [2020-09-21 10:20:42,184 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 93) the Hoare annotation is: true [2020-09-21 10:20:42,184 INFO L268 CegarLoopResult]: For program point L26(lines 26 28) no Hoare annotation was computed. [2020-09-21 10:20:42,184 INFO L268 CegarLoopResult]: For program point L84(line 84) no Hoare annotation was computed. [2020-09-21 10:20:42,184 INFO L264 CegarLoopResult]: At program point L84-1(lines 5 93) the Hoare annotation is: false [2020-09-21 10:20:42,185 INFO L268 CegarLoopResult]: For program point L68-1(lines 24 88) no Hoare annotation was computed. [2020-09-21 10:20:42,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 10:20:42 BoogieIcfgContainer [2020-09-21 10:20:42,199 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 10:20:42,203 INFO L168 Benchmark]: Toolchain (without parser) took 2647.92 ms. Allocated memory was 147.8 MB in the beginning and 234.4 MB in the end (delta: 86.5 MB). Free memory was 104.1 MB in the beginning and 143.4 MB in the end (delta: -39.3 MB). Peak memory consumption was 47.2 MB. Max. memory is 7.1 GB. [2020-09-21 10:20:42,204 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 147.8 MB. Free memory was 122.4 MB in the beginning and 121.9 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-09-21 10:20:42,205 INFO L168 Benchmark]: CACSL2BoogieTranslator took 312.41 ms. Allocated memory is still 147.8 MB. Free memory was 103.7 MB in the beginning and 93.1 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-09-21 10:20:42,206 INFO L168 Benchmark]: Boogie Preprocessor took 130.11 ms. Allocated memory was 147.8 MB in the beginning and 203.4 MB in the end (delta: 55.6 MB). Free memory was 93.1 MB in the beginning and 181.9 MB in the end (delta: -88.8 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-09-21 10:20:42,207 INFO L168 Benchmark]: RCFGBuilder took 380.01 ms. Allocated memory is still 203.4 MB. Free memory was 181.9 MB in the beginning and 167.0 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. [2020-09-21 10:20:42,208 INFO L168 Benchmark]: TraceAbstraction took 1815.44 ms. Allocated memory was 203.4 MB in the beginning and 234.4 MB in the end (delta: 30.9 MB). Free memory was 166.1 MB in the beginning and 143.4 MB in the end (delta: 22.7 MB). Peak memory consumption was 53.6 MB. Max. memory is 7.1 GB. [2020-09-21 10:20:42,211 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 147.8 MB. Free memory was 122.4 MB in the beginning and 121.9 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 312.41 ms. Allocated memory is still 147.8 MB. Free memory was 103.7 MB in the beginning and 93.1 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 130.11 ms. Allocated memory was 147.8 MB in the beginning and 203.4 MB in the end (delta: 55.6 MB). Free memory was 93.1 MB in the beginning and 181.9 MB in the end (delta: -88.8 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 380.01 ms. Allocated memory is still 203.4 MB. Free memory was 181.9 MB in the beginning and 167.0 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1815.44 ms. Allocated memory was 203.4 MB in the beginning and 234.4 MB in the end (delta: 30.9 MB). Free memory was 166.1 MB in the beginning and 143.4 MB in the end (delta: 22.7 MB). Peak memory consumption was 53.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 91]: 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: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.6s, OverallIterations: 14, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 654 SDtfs, 285 SDslu, 428 SDs, 0 SdLazy, 75 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=392occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 138 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 42 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 240 NumberOfCodeBlocks, 240 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 226 ConstructedInterpolants, 0 QuantifiedInterpolants, 6424 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 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...