/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_i10_o10-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 14:55:04,906 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-21 14:55:04,952 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 14:55:04,953 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 14:55:04,954 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 14:55:04,959 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 14:55:04,960 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 14:55:04,963 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 14:55:04,965 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 14:55:04,970 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 14:55:04,974 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 14:55:04,975 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 14:55:04,978 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 14:55:04,979 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 14:55:04,985 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 14:55:05,002 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 14:55:05,003 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 14:55:05,007 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 14:55:05,008 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 14:55:05,047 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 14:55:05,047 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 14:55:05,048 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 14:55:05,049 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 14:55:05,049 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 14:55:05,049 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 14:55:05,050 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 14:55:05,050 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 14:55:05,050 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 14:55:05,050 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 14:55:05,051 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 14:55:05,052 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 14:55:05,052 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 14:55:05,052 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 14:55:05,052 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 14:55:05,053 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 14:55:05,053 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 14:55:05,053 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 14:55:05,053 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 14:55:05,053 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 14:55:05,053 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 14:55:05,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 14:55:05,054 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 14:55:05,054 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 14:55:05,054 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 14:55:05,054 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 14:55:05,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 14:55:05,055 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 14:55:05,055 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 14:55:05,055 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> interpolation-heuristic=FIRST;log-additional-information=true; [2020-08-21 14:55:05,351 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 14:55:05,372 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 14:55:05,376 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 14:55:05,377 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 14:55:05,378 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 14:55:05,379 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i10_o10-2.c [2020-08-21 14:55:05,454 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f978ad14c/e305002863c6474995642582f37c248b/FLAG065907f80 [2020-08-21 14:55:05,912 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 14:55:05,913 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_i10_o10-2.c [2020-08-21 14:55:05,919 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f978ad14c/e305002863c6474995642582f37c248b/FLAG065907f80 [2020-08-21 14:55:06,289 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f978ad14c/e305002863c6474995642582f37c248b [2020-08-21 14:55:06,303 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 14:55:06,305 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 14:55:06,312 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 14:55:06,312 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 14:55:06,319 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 14:55:06,320 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:55:06" (1/1) ... [2020-08-21 14:55:06,324 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e48a7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:55:06, skipping insertion in model container [2020-08-21 14:55:06,324 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:55:06" (1/1) ... [2020-08-21 14:55:06,333 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 14:55:06,354 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 14:55:06,559 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:55:06,562 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 14:55:06,574 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:55:06,585 INFO L208 MainTranslator]: Completed translation [2020-08-21 14:55:06,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:55:06 WrapperNode [2020-08-21 14:55:06,586 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 14:55:06,587 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 14:55:06,587 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 14:55:06,587 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 14:55:06,597 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:55:06" (1/1) ... [2020-08-21 14:55:06,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:55:06" (1/1) ... [2020-08-21 14:55:06,602 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:55:06" (1/1) ... [2020-08-21 14:55:06,602 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:55:06" (1/1) ... [2020-08-21 14:55:06,605 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:55:06" (1/1) ... [2020-08-21 14:55:06,607 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:55:06" (1/1) ... [2020-08-21 14:55:06,608 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:55:06" (1/1) ... [2020-08-21 14:55:06,609 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 14:55:06,610 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 14:55:06,610 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 14:55:06,610 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 14:55:06,611 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:55:06" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 14:55:06,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 14:55:06,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 14:55:06,751 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-21 14:55:06,752 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 14:55:06,752 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 14:55:06,752 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 14:55:06,752 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-21 14:55:06,752 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 14:55:06,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 14:55:06,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 14:55:06,911 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 14:55:06,912 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 14:55:06,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:55:06 BoogieIcfgContainer [2020-08-21 14:55:06,915 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 14:55:06,916 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 14:55:06,917 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 14:55:06,922 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 14:55:06,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 02:55:06" (1/3) ... [2020-08-21 14:55:06,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d4a9abd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:55:06, skipping insertion in model container [2020-08-21 14:55:06,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:55:06" (2/3) ... [2020-08-21 14:55:06,924 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d4a9abd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:55:06, skipping insertion in model container [2020-08-21 14:55:06,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:55:06" (3/3) ... [2020-08-21 14:55:06,926 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i10_o10-2.c [2020-08-21 14:55:06,934 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 14:55:06,943 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 14:55:06,958 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 14:55:06,981 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 14:55:06,981 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 14:55:06,982 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 14:55:06,982 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 14:55:06,982 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 14:55:06,982 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 14:55:06,982 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 14:55:06,983 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 14:55:07,000 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-21 14:55:07,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 14:55:07,005 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:55:07,006 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:55:07,007 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:55:07,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:55:07,011 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-08-21 14:55:07,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:55:07,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119706284] [2020-08-21 14:55:07,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:55:07,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:07,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:55:07,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:07,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:55:07,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:07,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:55:07,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119706284] [2020-08-21 14:55:07,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:55:07,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 14:55:07,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069214914] [2020-08-21 14:55:07,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 14:55:07,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:55:07,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 14:55:07,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 14:55:07,293 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-21 14:55:07,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:55:07,369 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-21 14:55:07,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 14:55:07,371 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-21 14:55:07,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:55:07,382 INFO L225 Difference]: With dead ends: 30 [2020-08-21 14:55:07,382 INFO L226 Difference]: Without dead ends: 18 [2020-08-21 14:55:07,386 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 14:55:07,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-21 14:55:07,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-21 14:55:07,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-21 14:55:07,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-21 14:55:07,427 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-21 14:55:07,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:55:07,428 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-21 14:55:07,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 14:55:07,428 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-21 14:55:07,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 14:55:07,430 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:55:07,430 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:55:07,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 14:55:07,431 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:55:07,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:55:07,432 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-08-21 14:55:07,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:55:07,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327391624] [2020-08-21 14:55:07,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:55:07,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:07,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:55:07,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:07,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:55:07,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:07,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:07,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:07,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 14:55:07,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327391624] [2020-08-21 14:55:07,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:55:07,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 14:55:07,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230173922] [2020-08-21 14:55:07,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 14:55:07,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:55:07,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 14:55:07,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 14:55:07,621 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-08-21 14:55:07,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:55:07,701 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-21 14:55:07,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 14:55:07,702 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-21 14:55:07,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:55:07,703 INFO L225 Difference]: With dead ends: 25 [2020-08-21 14:55:07,704 INFO L226 Difference]: Without dead ends: 21 [2020-08-21 14:55:07,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-21 14:55:07,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-21 14:55:07,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-21 14:55:07,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-21 14:55:07,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-21 14:55:07,719 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-21 14:55:07,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:55:07,721 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-21 14:55:07,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 14:55:07,722 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-21 14:55:07,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 14:55:07,724 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:55:07,724 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:55:07,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 14:55:07,726 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:55:07,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:55:07,727 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-08-21 14:55:07,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:55:07,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1642394466] [2020-08-21 14:55:07,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:55:07,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:07,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:55:07,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:07,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:55:07,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:07,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:07,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:07,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:07,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:07,901 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-21 14:55:07,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1642394466] [2020-08-21 14:55:07,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:55:07,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 14:55:07,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863827874] [2020-08-21 14:55:07,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 14:55:07,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:55:07,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 14:55:07,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-21 14:55:07,904 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-08-21 14:55:07,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:55:07,964 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-21 14:55:07,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 14:55:07,964 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-21 14:55:07,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:55:07,966 INFO L225 Difference]: With dead ends: 28 [2020-08-21 14:55:07,966 INFO L226 Difference]: Without dead ends: 24 [2020-08-21 14:55:07,967 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-21 14:55:07,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-21 14:55:07,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-21 14:55:07,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-21 14:55:07,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-21 14:55:07,974 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-21 14:55:07,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:55:07,974 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-21 14:55:07,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 14:55:07,975 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-21 14:55:07,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 14:55:07,976 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:55:07,976 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:55:07,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 14:55:07,977 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:55:07,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:55:07,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-08-21 14:55:07,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:55:07,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455920177] [2020-08-21 14:55:07,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:55:07,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:08,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:55:08,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:08,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:55:08,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:08,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:08,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:08,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:08,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:08,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:08,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:08,212 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-21 14:55:08,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455920177] [2020-08-21 14:55:08,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:55:08,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 14:55:08,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577354449] [2020-08-21 14:55:08,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 14:55:08,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:55:08,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 14:55:08,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-21 14:55:08,218 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-08-21 14:55:08,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:55:08,324 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-21 14:55:08,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 14:55:08,324 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-08-21 14:55:08,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:55:08,326 INFO L225 Difference]: With dead ends: 31 [2020-08-21 14:55:08,326 INFO L226 Difference]: Without dead ends: 27 [2020-08-21 14:55:08,327 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-08-21 14:55:08,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-21 14:55:08,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-21 14:55:08,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-21 14:55:08,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-21 14:55:08,333 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-21 14:55:08,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:55:08,334 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-21 14:55:08,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 14:55:08,334 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-21 14:55:08,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-21 14:55:08,336 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:55:08,336 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:55:08,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 14:55:08,337 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:55:08,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:55:08,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-08-21 14:55:08,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:55:08,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1735325780] [2020-08-21 14:55:08,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:55:08,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:08,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:55:08,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:08,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:55:08,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:08,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:08,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:08,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:08,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:08,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:08,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:08,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:08,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:08,504 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-21 14:55:08,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1735325780] [2020-08-21 14:55:08,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:55:08,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 14:55:08,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774747652] [2020-08-21 14:55:08,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 14:55:08,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:55:08,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 14:55:08,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-21 14:55:08,507 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2020-08-21 14:55:08,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:55:08,591 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-21 14:55:08,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 14:55:08,592 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-08-21 14:55:08,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:55:08,594 INFO L225 Difference]: With dead ends: 34 [2020-08-21 14:55:08,594 INFO L226 Difference]: Without dead ends: 30 [2020-08-21 14:55:08,595 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-08-21 14:55:08,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-21 14:55:08,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-21 14:55:08,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 14:55:08,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-21 14:55:08,602 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-21 14:55:08,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:55:08,602 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-21 14:55:08,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 14:55:08,603 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-21 14:55:08,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-21 14:55:08,604 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:55:08,604 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:55:08,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 14:55:08,605 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:55:08,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:55:08,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-08-21 14:55:08,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:55:08,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635096549] [2020-08-21 14:55:08,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:55:08,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:08,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:55:08,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:08,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:55:08,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:08,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:08,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:08,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:08,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:08,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:08,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:08,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:08,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:08,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:08,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:08,784 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-21 14:55:08,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635096549] [2020-08-21 14:55:08,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:55:08,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 14:55:08,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644218753] [2020-08-21 14:55:08,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 14:55:08,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:55:08,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 14:55:08,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-21 14:55:08,787 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2020-08-21 14:55:08,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:55:08,877 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-21 14:55:08,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 14:55:08,878 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-21 14:55:08,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:55:08,879 INFO L225 Difference]: With dead ends: 37 [2020-08-21 14:55:08,879 INFO L226 Difference]: Without dead ends: 33 [2020-08-21 14:55:08,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-08-21 14:55:08,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-21 14:55:08,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-21 14:55:08,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-21 14:55:08,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-21 14:55:08,888 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-21 14:55:08,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:55:08,889 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-21 14:55:08,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 14:55:08,889 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-21 14:55:08,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-21 14:55:08,890 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:55:08,891 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:55:08,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 14:55:08,891 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:55:08,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:55:08,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-08-21 14:55:08,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:55:08,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1365465607] [2020-08-21 14:55:08,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:55:08,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:08,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:55:08,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:08,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:55:08,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:08,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:08,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:08,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:08,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:08,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:09,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:09,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:09,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:09,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:09,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:09,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:09,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:09,087 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-21 14:55:09,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1365465607] [2020-08-21 14:55:09,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:55:09,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 14:55:09,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889237731] [2020-08-21 14:55:09,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 14:55:09,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:55:09,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 14:55:09,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-21 14:55:09,090 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2020-08-21 14:55:09,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:55:09,222 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-21 14:55:09,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 14:55:09,223 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-08-21 14:55:09,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:55:09,226 INFO L225 Difference]: With dead ends: 40 [2020-08-21 14:55:09,226 INFO L226 Difference]: Without dead ends: 36 [2020-08-21 14:55:09,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-08-21 14:55:09,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-21 14:55:09,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-21 14:55:09,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-21 14:55:09,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-21 14:55:09,235 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-21 14:55:09,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:55:09,235 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-21 14:55:09,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 14:55:09,239 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-21 14:55:09,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-21 14:55:09,240 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:55:09,240 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:55:09,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 14:55:09,240 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:55:09,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:55:09,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-08-21 14:55:09,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:55:09,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2131351616] [2020-08-21 14:55:09,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:55:09,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:09,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:55:09,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:09,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:55:09,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:09,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:09,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:09,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:09,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:09,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:09,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:09,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:09,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:09,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:09,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:09,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:09,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:09,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:09,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:09,556 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-21 14:55:09,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2131351616] [2020-08-21 14:55:09,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:55:09,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 14:55:09,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341417677] [2020-08-21 14:55:09,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 14:55:09,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:55:09,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 14:55:09,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-21 14:55:09,559 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2020-08-21 14:55:09,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:55:09,675 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-21 14:55:09,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 14:55:09,676 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-08-21 14:55:09,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:55:09,677 INFO L225 Difference]: With dead ends: 43 [2020-08-21 14:55:09,677 INFO L226 Difference]: Without dead ends: 39 [2020-08-21 14:55:09,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2020-08-21 14:55:09,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-21 14:55:09,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-21 14:55:09,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-21 14:55:09,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-21 14:55:09,685 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-21 14:55:09,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:55:09,686 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-21 14:55:09,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 14:55:09,686 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-21 14:55:09,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 14:55:09,687 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:55:09,688 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:55:09,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 14:55:09,688 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:55:09,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:55:09,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-08-21 14:55:09,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:55:09,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83764478] [2020-08-21 14:55:09,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:55:09,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:09,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:55:09,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:09,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:55:09,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:09,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:09,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:09,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:09,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:09,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:09,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:09,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:09,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:09,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:09,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:09,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:09,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:09,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:09,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:09,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:09,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:09,958 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-21 14:55:09,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83764478] [2020-08-21 14:55:09,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:55:09,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 14:55:09,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63132577] [2020-08-21 14:55:09,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 14:55:09,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:55:09,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 14:55:09,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-21 14:55:09,961 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2020-08-21 14:55:10,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:55:10,089 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-21 14:55:10,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 14:55:10,090 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-08-21 14:55:10,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:55:10,091 INFO L225 Difference]: With dead ends: 46 [2020-08-21 14:55:10,092 INFO L226 Difference]: Without dead ends: 42 [2020-08-21 14:55:10,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-08-21 14:55:10,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-21 14:55:10,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-21 14:55:10,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-21 14:55:10,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-21 14:55:10,099 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-21 14:55:10,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:55:10,100 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-21 14:55:10,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 14:55:10,100 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-21 14:55:10,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-21 14:55:10,101 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:55:10,101 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:55:10,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 14:55:10,102 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:55:10,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:55:10,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-08-21 14:55:10,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:55:10,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259735203] [2020-08-21 14:55:10,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:55:10,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:10,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:55:10,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:10,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:55:10,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:10,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:10,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:10,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:10,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:10,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:10,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:10,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:10,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:10,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:10,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:10,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:10,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:10,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:10,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:10,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:10,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:10,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:10,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:10,389 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-21 14:55:10,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259735203] [2020-08-21 14:55:10,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:55:10,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 14:55:10,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624503684] [2020-08-21 14:55:10,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 14:55:10,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:55:10,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 14:55:10,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-21 14:55:10,392 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2020-08-21 14:55:10,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:55:10,552 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-21 14:55:10,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 14:55:10,553 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-08-21 14:55:10,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:55:10,555 INFO L225 Difference]: With dead ends: 49 [2020-08-21 14:55:10,555 INFO L226 Difference]: Without dead ends: 45 [2020-08-21 14:55:10,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2020-08-21 14:55:10,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-21 14:55:10,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-21 14:55:10,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-21 14:55:10,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-21 14:55:10,562 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-21 14:55:10,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:55:10,563 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-21 14:55:10,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 14:55:10,563 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-21 14:55:10,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-21 14:55:10,564 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:55:10,564 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:55:10,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 14:55:10,565 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:55:10,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:55:10,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-08-21 14:55:10,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:55:10,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1671533142] [2020-08-21 14:55:10,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:55:10,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:10,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:55:10,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:10,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:55:10,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:10,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:10,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:10,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:10,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:10,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:10,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:10,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:10,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:10,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:10,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:10,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:11,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:11,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:11,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:11,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:11,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:11,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:11,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:11,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:11,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:11,338 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-08-21 14:55:11,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1671533142] [2020-08-21 14:55:11,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:55:11,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-21 14:55:11,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092602188] [2020-08-21 14:55:11,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-21 14:55:11,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:55:11,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-21 14:55:11,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-08-21 14:55:11,343 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 25 states. [2020-08-21 14:55:11,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:55:11,622 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-08-21 14:55:11,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-21 14:55:11,622 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2020-08-21 14:55:11,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:55:11,624 INFO L225 Difference]: With dead ends: 52 [2020-08-21 14:55:11,624 INFO L226 Difference]: Without dead ends: 48 [2020-08-21 14:55:11,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-08-21 14:55:11,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-21 14:55:11,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-08-21 14:55:11,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-21 14:55:11,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-08-21 14:55:11,631 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-08-21 14:55:11,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:55:11,632 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-08-21 14:55:11,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-21 14:55:11,632 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-08-21 14:55:11,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-21 14:55:11,633 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:55:11,633 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:55:11,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 14:55:11,634 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:55:11,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:55:11,634 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2020-08-21 14:55:11,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:55:11,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855033767] [2020-08-21 14:55:11,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:55:11,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:11,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:55:11,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:11,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:55:11,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:11,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:11,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:11,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:11,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:11,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:11,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:11,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:11,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:11,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:11,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:11,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:11,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:11,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:11,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:11,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:11,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:11,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:11,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:11,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:11,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:11,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:55:11,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:55:12,004 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 165 proven. 22 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-08-21 14:55:12,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855033767] [2020-08-21 14:55:12,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:55:12,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-21 14:55:12,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565181337] [2020-08-21 14:55:12,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-21 14:55:12,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:55:12,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-21 14:55:12,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-08-21 14:55:12,007 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2020-08-21 14:55:12,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:55:12,259 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2020-08-21 14:55:12,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 14:55:12,259 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2020-08-21 14:55:12,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:55:12,260 INFO L225 Difference]: With dead ends: 48 [2020-08-21 14:55:12,260 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 14:55:12,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=242, Invalid=514, Unknown=0, NotChecked=0, Total=756 [2020-08-21 14:55:12,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 14:55:12,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 14:55:12,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 14:55:12,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 14:55:12,262 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 79 [2020-08-21 14:55:12,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:55:12,262 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 14:55:12,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-21 14:55:12,262 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 14:55:12,262 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 14:55:12,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 14:55:12,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 14:55:12,303 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 14:55:12,303 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 14:55:12,303 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 14:55:12,303 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 14:55:12,303 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 14:55:12,303 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 14:55:12,304 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2020-08-21 14:55:12,304 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 9 15) the Hoare annotation is: true [2020-08-21 14:55:12,304 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 9 15) no Hoare annotation was computed. [2020-08-21 14:55:12,304 INFO L268 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-08-21 14:55:12,304 INFO L268 CegarLoopResult]: For program point L12(lines 12 14) no Hoare annotation was computed. [2020-08-21 14:55:12,305 INFO L264 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (<= 10 main_~input~0) (<= main_~input~0 10)) [2020-08-21 14:55:12,305 INFO L268 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-08-21 14:55:12,305 INFO L268 CegarLoopResult]: For program point L12-2(lines 9 15) no Hoare annotation was computed. [2020-08-21 14:55:12,305 INFO L268 CegarLoopResult]: For program point idFINAL(lines 4 7) no Hoare annotation was computed. [2020-08-21 14:55:12,305 INFO L268 CegarLoopResult]: For program point idEXIT(lines 4 7) no Hoare annotation was computed. [2020-08-21 14:55:12,305 INFO L271 CegarLoopResult]: At program point idENTRY(lines 4 7) the Hoare annotation is: true [2020-08-21 14:55:12,305 INFO L264 CegarLoopResult]: At program point L6(line 6) the Hoare annotation is: (= |id_#in~x| id_~x) [2020-08-21 14:55:12,306 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-08-21 14:55:12,306 INFO L268 CegarLoopResult]: For program point L6-1(line 6) no Hoare annotation was computed. [2020-08-21 14:55:12,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 02:55:12 BoogieIcfgContainer [2020-08-21 14:55:12,313 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 14:55:12,316 INFO L168 Benchmark]: Toolchain (without parser) took 6010.95 ms. Allocated memory was 141.6 MB in the beginning and 288.4 MB in the end (delta: 146.8 MB). Free memory was 103.4 MB in the beginning and 98.7 MB in the end (delta: 4.7 MB). Peak memory consumption was 151.5 MB. Max. memory is 7.1 GB. [2020-08-21 14:55:12,317 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 141.6 MB. Free memory was 121.2 MB in the beginning and 121.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 14:55:12,318 INFO L168 Benchmark]: CACSL2BoogieTranslator took 274.74 ms. Allocated memory is still 141.6 MB. Free memory was 103.2 MB in the beginning and 94.0 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-08-21 14:55:12,319 INFO L168 Benchmark]: Boogie Preprocessor took 22.66 ms. Allocated memory is still 141.6 MB. Free memory was 94.0 MB in the beginning and 92.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-08-21 14:55:12,319 INFO L168 Benchmark]: RCFGBuilder took 305.34 ms. Allocated memory was 141.6 MB in the beginning and 202.4 MB in the end (delta: 60.8 MB). Free memory was 92.6 MB in the beginning and 170.3 MB in the end (delta: -77.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-08-21 14:55:12,320 INFO L168 Benchmark]: TraceAbstraction took 5397.20 ms. Allocated memory was 202.4 MB in the beginning and 288.4 MB in the end (delta: 86.0 MB). Free memory was 170.3 MB in the beginning and 98.7 MB in the end (delta: 71.6 MB). Peak memory consumption was 157.6 MB. Max. memory is 7.1 GB. [2020-08-21 14:55:12,324 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 141.6 MB. Free memory was 121.2 MB in the beginning and 121.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 274.74 ms. Allocated memory is still 141.6 MB. Free memory was 103.2 MB in the beginning and 94.0 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 22.66 ms. Allocated memory is still 141.6 MB. Free memory was 94.0 MB in the beginning and 92.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 305.34 ms. Allocated memory was 141.6 MB in the beginning and 202.4 MB in the end (delta: 60.8 MB). Free memory was 92.6 MB in the beginning and 170.3 MB in the end (delta: -77.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5397.20 ms. Allocated memory was 202.4 MB in the beginning and 288.4 MB in the end (delta: 86.0 MB). Free memory was 170.3 MB in the beginning and 98.7 MB in the end (delta: 71.6 MB). Peak memory consumption was 157.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.2s, OverallIterations: 12, TraceHistogramMax: 12, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 200 SDtfs, 167 SDslu, 1215 SDs, 0 SdLazy, 702 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 372 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 12 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 15 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.0s InterpolantComputationTime, 552 NumberOfCodeBlocks, 552 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 540 ConstructedInterpolants, 0 QuantifiedInterpolants, 78096 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 1 PerfectInterpolantSequences, 957/1584 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...