/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/sum_15x0-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 04:22:55,892 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 04:22:55,896 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 04:22:55,936 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-19 04:22:55,955 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 04:22:55,956 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 04:22:55,959 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 04:22:55,960 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 04:22:55,962 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 04:22:55,965 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 04:22:55,967 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 04:22:55,975 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 04:22:55,978 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 04:22:55,980 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 04:22:55,981 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 04:22:55,982 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 04:22:55,986 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 04:22:56,006 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 04:22:56,008 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 04:22:56,008 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 04:22:56,009 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 [2020-08-19 04:22:56,052 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 04:22:56,052 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 04:22:56,054 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 04:22:56,054 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 04:22:56,054 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 04:22:56,055 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 04:22:56,055 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 04:22:56,055 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 04:22:56,055 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 04:22:56,056 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 04:22:56,057 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 04:22:56,057 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 04:22:56,057 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 04:22:56,057 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 04:22:56,058 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 04:22:56,058 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 04:22:56,058 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 04:22:56,058 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 04:22:56,058 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 04:22:56,059 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 04:22:56,059 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 04:22:56,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 04:22:56,059 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 04:22:56,059 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 04:22:56,060 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 04:22:56,060 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 04:22:56,060 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 04:22:56,060 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 04:22:56,060 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 04:22:56,061 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2; [2020-08-19 04:22:56,404 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 04:22:56,421 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 04:22:56,429 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 04:22:56,431 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 04:22:56,431 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 04:22:56,432 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_15x0-1.c [2020-08-19 04:22:56,519 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5f3114f91/2844650edeef4afc951e18800d82d499/FLAGd2542622e [2020-08-19 04:22:56,943 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 04:22:56,943 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/sum_15x0-1.c [2020-08-19 04:22:56,949 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5f3114f91/2844650edeef4afc951e18800d82d499/FLAGd2542622e [2020-08-19 04:22:57,319 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5f3114f91/2844650edeef4afc951e18800d82d499 [2020-08-19 04:22:57,328 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 04:22:57,330 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 04:22:57,331 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 04:22:57,332 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 04:22:57,335 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 04:22:57,337 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 04:22:57" (1/1) ... [2020-08-19 04:22:57,340 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6220607 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:22:57, skipping insertion in model container [2020-08-19 04:22:57,340 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 04:22:57" (1/1) ... [2020-08-19 04:22:57,349 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 04:22:57,369 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 04:22:57,608 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 04:22:57,615 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 04:22:57,636 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 04:22:57,652 INFO L208 MainTranslator]: Completed translation [2020-08-19 04:22:57,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:22:57 WrapperNode [2020-08-19 04:22:57,655 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 04:22:57,656 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 04:22:57,656 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 04:22:57,656 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 04:22:57,670 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:22:57" (1/1) ... [2020-08-19 04:22:57,672 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:22:57" (1/1) ... [2020-08-19 04:22:57,676 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:22:57" (1/1) ... [2020-08-19 04:22:57,676 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:22:57" (1/1) ... [2020-08-19 04:22:57,680 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:22:57" (1/1) ... [2020-08-19 04:22:57,682 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:22:57" (1/1) ... [2020-08-19 04:22:57,683 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:22:57" (1/1) ... [2020-08-19 04:22:57,685 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 04:22:57,685 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 04:22:57,686 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 04:22:57,686 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 04:22:57,687 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:22:57" (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 [2020-08-19 04:22:57,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 04:22:57,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 04:22:57,837 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-08-19 04:22:57,837 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 04:22:57,837 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 04:22:57,837 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-08-19 04:22:57,837 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 04:22:57,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 04:22:57,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 04:22:58,008 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 04:22:58,009 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-19 04:22:58,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 04:22:58 BoogieIcfgContainer [2020-08-19 04:22:58,015 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 04:22:58,016 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 04:22:58,017 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 04:22:58,020 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 04:22:58,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 04:22:57" (1/3) ... [2020-08-19 04:22:58,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cbc3883 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 04:22:58, skipping insertion in model container [2020-08-19 04:22:58,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:22:57" (2/3) ... [2020-08-19 04:22:58,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cbc3883 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 04:22:58, skipping insertion in model container [2020-08-19 04:22:58,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 04:22:58" (3/3) ... [2020-08-19 04:22:58,024 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_15x0-1.c [2020-08-19 04:22:58,037 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 04:22:58,046 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 04:22:58,064 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 04:22:58,120 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 04:22:58,120 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 04:22:58,121 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 04:22:58,121 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 04:22:58,121 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 04:22:58,121 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 04:22:58,121 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 04:22:58,122 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 04:22:58,144 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-19 04:22:58,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-19 04:22:58,153 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:22:58,155 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:22:58,155 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:22:58,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:22:58,163 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2020-08-19 04:22:58,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:22:58,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [401959235] [2020-08-19 04:22:58,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:22:58,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:58,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:22:58,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:58,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:22:58,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:58,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:22:58,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [401959235] [2020-08-19 04:22:58,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:22:58,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 04:22:58,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571429804] [2020-08-19 04:22:58,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 04:22:58,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:22:58,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 04:22:58,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 04:22:58,496 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-19 04:22:58,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:22:58,583 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-19 04:22:58,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 04:22:58,585 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-19 04:22:58,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:22:58,595 INFO L225 Difference]: With dead ends: 30 [2020-08-19 04:22:58,595 INFO L226 Difference]: Without dead ends: 18 [2020-08-19 04:22:58,599 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 [2020-08-19 04:22:58,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-19 04:22:58,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-19 04:22:58,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-19 04:22:58,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-19 04:22:58,649 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-19 04:22:58,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:22:58,650 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-19 04:22:58,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 04:22:58,651 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-19 04:22:58,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 04:22:58,653 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:22:58,653 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:22:58,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 04:22:58,654 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:22:58,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:22:58,655 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2020-08-19 04:22:58,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:22:58,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842196861] [2020-08-19 04:22:58,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:22:58,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:58,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:22:58,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:58,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:22:58,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:58,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:58,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:58,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-19 04:22:58,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842196861] [2020-08-19 04:22:58,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:22:58,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-19 04:22:58,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67590287] [2020-08-19 04:22:58,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 04:22:58,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:22:58,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 04:22:58,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-19 04:22:58,793 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-08-19 04:22:58,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:22:58,876 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-19 04:22:58,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 04:22:58,877 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-19 04:22:58,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:22:58,878 INFO L225 Difference]: With dead ends: 25 [2020-08-19 04:22:58,878 INFO L226 Difference]: Without dead ends: 21 [2020-08-19 04:22:58,880 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 [2020-08-19 04:22:58,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-19 04:22:58,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-19 04:22:58,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-19 04:22:58,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-19 04:22:58,892 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-19 04:22:58,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:22:58,893 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-19 04:22:58,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 04:22:58,894 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-19 04:22:58,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 04:22:58,896 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:22:58,896 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:22:58,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 04:22:58,897 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:22:58,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:22:58,898 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2020-08-19 04:22:58,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:22:58,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835647665] [2020-08-19 04:22:58,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:22:58,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:58,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:22:58,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:58,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:22:58,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:58,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:59,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:59,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:59,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:59,050 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-19 04:22:59,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1835647665] [2020-08-19 04:22:59,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:22:59,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 04:22:59,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579467894] [2020-08-19 04:22:59,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 04:22:59,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:22:59,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 04:22:59,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-19 04:22:59,053 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-08-19 04:22:59,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:22:59,118 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-19 04:22:59,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 04:22:59,119 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-19 04:22:59,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:22:59,120 INFO L225 Difference]: With dead ends: 28 [2020-08-19 04:22:59,120 INFO L226 Difference]: Without dead ends: 24 [2020-08-19 04:22:59,121 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 [2020-08-19 04:22:59,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-19 04:22:59,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-19 04:22:59,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-19 04:22:59,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-19 04:22:59,128 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-19 04:22:59,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:22:59,129 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-19 04:22:59,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 04:22:59,129 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-19 04:22:59,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-19 04:22:59,130 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:22:59,131 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:22:59,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 04:22:59,131 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:22:59,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:22:59,132 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2020-08-19 04:22:59,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:22:59,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [667614874] [2020-08-19 04:22:59,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:22:59,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:59,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:22:59,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:59,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:22:59,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:59,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:59,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:59,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:59,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:59,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:59,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:59,351 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-19 04:22:59,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [667614874] [2020-08-19 04:22:59,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:22:59,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 04:22:59,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632351968] [2020-08-19 04:22:59,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 04:22:59,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:22:59,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 04:22:59,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-19 04:22:59,354 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-08-19 04:22:59,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:22:59,442 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-19 04:22:59,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 04:22:59,443 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-08-19 04:22:59,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:22:59,444 INFO L225 Difference]: With dead ends: 31 [2020-08-19 04:22:59,445 INFO L226 Difference]: Without dead ends: 27 [2020-08-19 04:22:59,445 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 [2020-08-19 04:22:59,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-19 04:22:59,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-19 04:22:59,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-19 04:22:59,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-19 04:22:59,452 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-19 04:22:59,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:22:59,453 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-19 04:22:59,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 04:22:59,453 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-19 04:22:59,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-19 04:22:59,455 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:22:59,455 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:22:59,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 04:22:59,455 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:22:59,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:22:59,456 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2020-08-19 04:22:59,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:22:59,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611913708] [2020-08-19 04:22:59,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:22:59,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:59,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:22:59,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:59,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:22:59,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:59,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:59,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:59,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:59,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:59,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:59,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:59,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:59,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:59,608 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-19 04:22:59,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611913708] [2020-08-19 04:22:59,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:22:59,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 04:22:59,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260561328] [2020-08-19 04:22:59,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 04:22:59,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:22:59,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 04:22:59,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-19 04:22:59,610 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2020-08-19 04:22:59,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:22:59,706 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-19 04:22:59,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 04:22:59,707 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-08-19 04:22:59,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:22:59,709 INFO L225 Difference]: With dead ends: 34 [2020-08-19 04:22:59,709 INFO L226 Difference]: Without dead ends: 30 [2020-08-19 04:22:59,710 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-08-19 04:22:59,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-19 04:22:59,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-19 04:22:59,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-19 04:22:59,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-19 04:22:59,716 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-19 04:22:59,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:22:59,717 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-19 04:22:59,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 04:22:59,717 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-19 04:22:59,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-19 04:22:59,719 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:22:59,719 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:22:59,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 04:22:59,719 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:22:59,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:22:59,720 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2020-08-19 04:22:59,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:22:59,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [959454226] [2020-08-19 04:22:59,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:22:59,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:59,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:22:59,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:59,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:22:59,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:59,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:59,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:59,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:59,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:59,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:59,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:59,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:59,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:59,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:59,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:59,962 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-19 04:22:59,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [959454226] [2020-08-19 04:22:59,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:22:59,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 04:22:59,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582917580] [2020-08-19 04:22:59,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 04:22:59,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:22:59,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 04:22:59,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-19 04:22:59,964 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2020-08-19 04:23:00,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:00,066 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-19 04:23:00,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 04:23:00,067 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-19 04:23:00,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:00,068 INFO L225 Difference]: With dead ends: 37 [2020-08-19 04:23:00,068 INFO L226 Difference]: Without dead ends: 33 [2020-08-19 04:23:00,069 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 [2020-08-19 04:23:00,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-19 04:23:00,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-19 04:23:00,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-19 04:23:00,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-19 04:23:00,076 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-19 04:23:00,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:00,077 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-19 04:23:00,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 04:23:00,077 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-19 04:23:00,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-19 04:23:00,079 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:00,079 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:23:00,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 04:23:00,079 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:00,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:00,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2020-08-19 04:23:00,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:00,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [768103103] [2020-08-19 04:23:00,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:00,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:00,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:00,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:00,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:23:00,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:00,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:00,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:00,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:00,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:00,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:00,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:00,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:00,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:00,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:00,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:00,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:00,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:00,300 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-19 04:23:00,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [768103103] [2020-08-19 04:23:00,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:23:00,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 04:23:00,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261178625] [2020-08-19 04:23:00,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 04:23:00,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:00,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 04:23:00,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-19 04:23:00,303 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2020-08-19 04:23:00,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:00,417 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-19 04:23:00,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 04:23:00,418 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-08-19 04:23:00,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:00,419 INFO L225 Difference]: With dead ends: 40 [2020-08-19 04:23:00,420 INFO L226 Difference]: Without dead ends: 36 [2020-08-19 04:23:00,420 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 [2020-08-19 04:23:00,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-19 04:23:00,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-19 04:23:00,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-19 04:23:00,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-19 04:23:00,427 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-19 04:23:00,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:00,428 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-19 04:23:00,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 04:23:00,428 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-19 04:23:00,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-19 04:23:00,429 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:00,429 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:23:00,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 04:23:00,430 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:00,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:00,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2020-08-19 04:23:00,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:00,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580309994] [2020-08-19 04:23:00,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:00,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:00,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:00,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:00,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:23:00,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:00,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:00,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:00,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:00,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:00,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:00,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:00,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:00,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:00,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:00,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:00,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:00,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:00,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:00,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:00,648 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-19 04:23:00,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580309994] [2020-08-19 04:23:00,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:23:00,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-19 04:23:00,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63357241] [2020-08-19 04:23:00,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 04:23:00,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:00,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 04:23:00,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-19 04:23:00,651 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2020-08-19 04:23:00,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:00,766 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-19 04:23:00,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-19 04:23:00,767 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-08-19 04:23:00,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:00,769 INFO L225 Difference]: With dead ends: 43 [2020-08-19 04:23:00,769 INFO L226 Difference]: Without dead ends: 39 [2020-08-19 04:23:00,770 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 [2020-08-19 04:23:00,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-19 04:23:00,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-19 04:23:00,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-19 04:23:00,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-19 04:23:00,777 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-19 04:23:00,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:00,777 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-19 04:23:00,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 04:23:00,778 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-19 04:23:00,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-19 04:23:00,779 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:00,779 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:23:00,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 04:23:00,779 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:00,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:00,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2020-08-19 04:23:00,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:00,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [537750362] [2020-08-19 04:23:00,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:00,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:00,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:00,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:00,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:23:00,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:00,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:00,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:00,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:00,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:00,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:00,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:00,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:00,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:00,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:00,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:01,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:01,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:01,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:01,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:01,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:01,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:01,084 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-19 04:23:01,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [537750362] [2020-08-19 04:23:01,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:23:01,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-19 04:23:01,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841699202] [2020-08-19 04:23:01,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-19 04:23:01,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:01,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-19 04:23:01,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-19 04:23:01,087 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2020-08-19 04:23:01,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:01,220 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-19 04:23:01,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-19 04:23:01,221 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-08-19 04:23:01,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:01,222 INFO L225 Difference]: With dead ends: 46 [2020-08-19 04:23:01,223 INFO L226 Difference]: Without dead ends: 42 [2020-08-19 04:23:01,224 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 [2020-08-19 04:23:01,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-19 04:23:01,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-19 04:23:01,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-19 04:23:01,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-19 04:23:01,230 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-19 04:23:01,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:01,230 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-19 04:23:01,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-19 04:23:01,231 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-19 04:23:01,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-19 04:23:01,232 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:01,232 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:23:01,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 04:23:01,232 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:01,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:01,233 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2020-08-19 04:23:01,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:01,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [572607376] [2020-08-19 04:23:01,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:01,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:01,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:01,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:01,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:23:01,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:01,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:01,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:01,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:01,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:01,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:01,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:01,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:01,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:01,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:01,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:01,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:01,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:01,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:01,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:01,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:01,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:01,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:01,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:01,600 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-19 04:23:01,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [572607376] [2020-08-19 04:23:01,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:23:01,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-19 04:23:01,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824510039] [2020-08-19 04:23:01,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-19 04:23:01,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:01,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-19 04:23:01,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-19 04:23:01,606 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2020-08-19 04:23:01,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:01,759 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-19 04:23:01,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-19 04:23:01,760 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-08-19 04:23:01,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:01,761 INFO L225 Difference]: With dead ends: 49 [2020-08-19 04:23:01,761 INFO L226 Difference]: Without dead ends: 45 [2020-08-19 04:23:01,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2020-08-19 04:23:01,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-19 04:23:01,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-19 04:23:01,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-19 04:23:01,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-19 04:23:01,774 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-19 04:23:01,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:01,774 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-19 04:23:01,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-19 04:23:01,774 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-19 04:23:01,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-19 04:23:01,777 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:01,778 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:23:01,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 04:23:01,781 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:01,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:01,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2020-08-19 04:23:01,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:01,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [623264792] [2020-08-19 04:23:01,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:01,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:01,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:01,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:01,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:23:01,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:01,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:01,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:01,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:01,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:01,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:01,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:01,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:02,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:02,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:02,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:02,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:02,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:02,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:02,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:02,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:02,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:02,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:02,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:02,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:02,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:02,227 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-08-19 04:23:02,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [623264792] [2020-08-19 04:23:02,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:23:02,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-19 04:23:02,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234037437] [2020-08-19 04:23:02,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-19 04:23:02,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:02,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-19 04:23:02,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-08-19 04:23:02,231 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2020-08-19 04:23:02,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:02,398 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-08-19 04:23:02,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-19 04:23:02,399 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2020-08-19 04:23:02,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:02,400 INFO L225 Difference]: With dead ends: 52 [2020-08-19 04:23:02,400 INFO L226 Difference]: Without dead ends: 48 [2020-08-19 04:23:02,401 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2020-08-19 04:23:02,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-19 04:23:02,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-08-19 04:23:02,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-19 04:23:02,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-08-19 04:23:02,409 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-08-19 04:23:02,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:02,409 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-08-19 04:23:02,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-19 04:23:02,410 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-08-19 04:23:02,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-19 04:23:02,411 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:02,411 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:23:02,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 04:23:02,411 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:02,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:02,412 INFO L82 PathProgramCache]: Analyzing trace with hash -2010530748, now seen corresponding path program 11 times [2020-08-19 04:23:02,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:02,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [168740064] [2020-08-19 04:23:02,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:02,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:02,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:02,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:02,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:23:02,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:02,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:02,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:02,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:02,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:02,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:02,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:02,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:02,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:02,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:02,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:02,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:02,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:02,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:02,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:02,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:02,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:02,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:02,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:02,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:02,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:02,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:02,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:02,984 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-08-19 04:23:02,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [168740064] [2020-08-19 04:23:02,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:23:02,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-19 04:23:02,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533712148] [2020-08-19 04:23:02,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-19 04:23:02,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:02,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-19 04:23:02,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-08-19 04:23:02,988 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2020-08-19 04:23:03,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:03,184 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-08-19 04:23:03,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-19 04:23:03,185 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2020-08-19 04:23:03,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:03,186 INFO L225 Difference]: With dead ends: 55 [2020-08-19 04:23:03,186 INFO L226 Difference]: Without dead ends: 51 [2020-08-19 04:23:03,187 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2020-08-19 04:23:03,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-19 04:23:03,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-08-19 04:23:03,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-19 04:23:03,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-08-19 04:23:03,193 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-08-19 04:23:03,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:03,194 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-08-19 04:23:03,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-19 04:23:03,194 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-08-19 04:23:03,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-19 04:23:03,195 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:03,195 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:23:03,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 04:23:03,196 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:03,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:03,196 INFO L82 PathProgramCache]: Analyzing trace with hash -986521316, now seen corresponding path program 12 times [2020-08-19 04:23:03,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:03,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097706290] [2020-08-19 04:23:03,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:03,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:03,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:03,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:03,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:23:03,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:03,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:03,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:03,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:03,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:03,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:03,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:03,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:03,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:03,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:03,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:03,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:03,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:03,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:03,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:03,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:03,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:03,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:03,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:03,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:03,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:03,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:03,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:03,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:03,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:03,667 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-08-19 04:23:03,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097706290] [2020-08-19 04:23:03,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:23:03,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-19 04:23:03,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058997414] [2020-08-19 04:23:03,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-19 04:23:03,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:03,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-19 04:23:03,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-08-19 04:23:03,671 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 17 states. [2020-08-19 04:23:03,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:03,867 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-08-19 04:23:03,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-19 04:23:03,868 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2020-08-19 04:23:03,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:03,869 INFO L225 Difference]: With dead ends: 58 [2020-08-19 04:23:03,869 INFO L226 Difference]: Without dead ends: 54 [2020-08-19 04:23:03,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2020-08-19 04:23:03,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-19 04:23:03,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-08-19 04:23:03,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-19 04:23:03,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-08-19 04:23:03,880 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-08-19 04:23:03,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:03,880 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-08-19 04:23:03,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-19 04:23:03,881 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-08-19 04:23:03,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-19 04:23:03,881 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:03,882 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:23:03,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 04:23:03,882 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:03,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:03,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1073897604, now seen corresponding path program 13 times [2020-08-19 04:23:03,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:03,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331113805] [2020-08-19 04:23:03,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:03,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:03,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:03,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:03,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:23:03,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:03,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:04,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:04,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:04,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:04,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:04,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:04,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:04,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:04,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:04,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:04,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:04,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:04,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:04,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:04,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:04,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:04,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:04,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:04,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:04,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:04,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:04,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:04,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:04,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:04,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:04,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:04,441 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-08-19 04:23:04,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331113805] [2020-08-19 04:23:04,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:23:04,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-19 04:23:04,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371192644] [2020-08-19 04:23:04,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-19 04:23:04,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:04,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-19 04:23:04,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-08-19 04:23:04,444 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 18 states. [2020-08-19 04:23:04,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:04,635 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-08-19 04:23:04,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-19 04:23:04,635 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2020-08-19 04:23:04,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:04,636 INFO L225 Difference]: With dead ends: 61 [2020-08-19 04:23:04,636 INFO L226 Difference]: Without dead ends: 57 [2020-08-19 04:23:04,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2020-08-19 04:23:04,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-19 04:23:04,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-08-19 04:23:04,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-19 04:23:04,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-08-19 04:23:04,645 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-08-19 04:23:04,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:04,645 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-08-19 04:23:04,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-19 04:23:04,646 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-08-19 04:23:04,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-19 04:23:04,647 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:04,647 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:23:04,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 04:23:04,647 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:04,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:04,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1572648100, now seen corresponding path program 14 times [2020-08-19 04:23:04,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:04,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1632366477] [2020-08-19 04:23:04,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:04,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:04,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:04,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:04,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:23:04,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:04,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:04,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:04,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:04,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:04,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:04,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:04,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:04,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:04,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:04,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:04,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:04,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:04,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:04,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:05,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:05,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:05,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:05,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:05,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:05,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:05,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:05,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:05,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:05,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:05,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:05,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:05,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:05,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:05,334 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-08-19 04:23:05,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1632366477] [2020-08-19 04:23:05,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:23:05,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-19 04:23:05,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898507700] [2020-08-19 04:23:05,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-19 04:23:05,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:05,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-19 04:23:05,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-08-19 04:23:05,338 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2020-08-19 04:23:05,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:05,588 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-08-19 04:23:05,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-19 04:23:05,589 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2020-08-19 04:23:05,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:05,590 INFO L225 Difference]: With dead ends: 64 [2020-08-19 04:23:05,590 INFO L226 Difference]: Without dead ends: 60 [2020-08-19 04:23:05,594 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2020-08-19 04:23:05,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-19 04:23:05,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-08-19 04:23:05,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-19 04:23:05,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-08-19 04:23:05,604 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-08-19 04:23:05,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:05,605 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-08-19 04:23:05,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-19 04:23:05,605 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-08-19 04:23:05,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-19 04:23:05,607 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:05,607 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:23:05,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-19 04:23:05,608 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:05,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:05,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1584030916, now seen corresponding path program 15 times [2020-08-19 04:23:05,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:05,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2067830056] [2020-08-19 04:23:05,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:05,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:05,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:05,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:05,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:23:05,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:05,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:05,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:05,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:05,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:06,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:06,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:06,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:06,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:06,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:06,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:06,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:06,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:06,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:06,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:06,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:06,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:06,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:06,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:06,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:06,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:06,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:06,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:06,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:06,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:06,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:06,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:06,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:06,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:07,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:23:07,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:07,309 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 329 proven. 30 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2020-08-19 04:23:07,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2067830056] [2020-08-19 04:23:07,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:23:07,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-08-19 04:23:07,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552361857] [2020-08-19 04:23:07,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-08-19 04:23:07,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:07,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-08-19 04:23:07,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1122, Unknown=0, NotChecked=0, Total=1406 [2020-08-19 04:23:07,316 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 38 states. [2020-08-19 04:23:09,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:09,276 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2020-08-19 04:23:09,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-08-19 04:23:09,276 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 103 [2020-08-19 04:23:09,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:09,277 INFO L225 Difference]: With dead ends: 60 [2020-08-19 04:23:09,277 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 04:23:09,280 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=866, Invalid=4104, Unknown=0, NotChecked=0, Total=4970 [2020-08-19 04:23:09,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 04:23:09,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 04:23:09,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 04:23:09,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 04:23:09,281 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 103 [2020-08-19 04:23:09,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:09,282 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 04:23:09,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-08-19 04:23:09,282 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 04:23:09,282 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 04:23:09,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-19 04:23:09,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 04:23:09,316 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-19 04:23:09,316 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-19 04:23:09,316 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-19 04:23:09,316 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-19 04:23:09,316 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-19 04:23:09,317 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-19 04:23:09,317 INFO L268 CegarLoopResult]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2020-08-19 04:23:09,317 INFO L264 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (and (= sum_~n |sum_#in~n|) (<= 1 sum_~n) (= sum_~m |sum_#in~m|)) [2020-08-19 04:23:09,317 INFO L268 CegarLoopResult]: For program point L7-1(line 7) no Hoare annotation was computed. [2020-08-19 04:23:09,317 INFO L268 CegarLoopResult]: For program point L4(lines 4 8) no Hoare annotation was computed. [2020-08-19 04:23:09,317 INFO L268 CegarLoopResult]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2020-08-19 04:23:09,317 INFO L271 CegarLoopResult]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2020-08-19 04:23:09,318 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2020-08-19 04:23:09,318 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2020-08-19 04:23:09,318 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 18) no Hoare annotation was computed. [2020-08-19 04:23:09,318 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-08-19 04:23:09,318 INFO L268 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-08-19 04:23:09,318 INFO L264 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: (and (<= 15 main_~a~0) (<= main_~a~0 15)) [2020-08-19 04:23:09,318 INFO L268 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-08-19 04:23:09,319 INFO L268 CegarLoopResult]: For program point L15-2(lines 11 18) no Hoare annotation was computed. [2020-08-19 04:23:09,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 04:23:09 BoogieIcfgContainer [2020-08-19 04:23:09,331 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 04:23:09,343 INFO L168 Benchmark]: Toolchain (without parser) took 12003.59 ms. Allocated memory was 141.0 MB in the beginning and 400.0 MB in the end (delta: 259.0 MB). Free memory was 105.0 MB in the beginning and 351.7 MB in the end (delta: -246.7 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. [2020-08-19 04:23:09,344 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.2 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-08-19 04:23:09,347 INFO L168 Benchmark]: CACSL2BoogieTranslator took 323.79 ms. Allocated memory is still 141.0 MB. Free memory was 104.6 MB in the beginning and 95.5 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2020-08-19 04:23:09,348 INFO L168 Benchmark]: Boogie Preprocessor took 29.41 ms. Allocated memory is still 141.0 MB. Free memory was 95.5 MB in the beginning and 94.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-08-19 04:23:09,348 INFO L168 Benchmark]: RCFGBuilder took 329.70 ms. Allocated memory was 141.0 MB in the beginning and 202.4 MB in the end (delta: 61.3 MB). Free memory was 93.8 MB in the beginning and 170.4 MB in the end (delta: -76.6 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-08-19 04:23:09,349 INFO L168 Benchmark]: TraceAbstraction took 11315.27 ms. Allocated memory was 202.4 MB in the beginning and 400.0 MB in the end (delta: 197.7 MB). Free memory was 169.5 MB in the beginning and 351.7 MB in the end (delta: -182.2 MB). Peak memory consumption was 15.5 MB. Max. memory is 7.1 GB. [2020-08-19 04:23:09,357 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.2 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 323.79 ms. Allocated memory is still 141.0 MB. Free memory was 104.6 MB in the beginning and 95.5 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 29.41 ms. Allocated memory is still 141.0 MB. Free memory was 95.5 MB in the beginning and 94.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 329.70 ms. Allocated memory was 141.0 MB in the beginning and 202.4 MB in the end (delta: 61.3 MB). Free memory was 93.8 MB in the beginning and 170.4 MB in the end (delta: -76.6 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11315.27 ms. Allocated memory was 202.4 MB in the beginning and 400.0 MB in the end (delta: 197.7 MB). Free memory was 169.5 MB in the beginning and 351.7 MB in the end (delta: -182.2 MB). Peak memory consumption was 15.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: 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: 11.1s, OverallIterations: 16, TraceHistogramMax: 16, AutomataDifference: 4.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 207 SDtfs, 322 SDslu, 990 SDs, 0 SdLazy, 1033 SolverSat, 39 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 659 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 339 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1588 ImplicationChecksByTransitivity, 5.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 16 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 22 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 6.1s InterpolantComputationTime, 928 NumberOfCodeBlocks, 928 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 912 ConstructedInterpolants, 0 QuantifiedInterpolants, 213258 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 16 InterpolantComputations, 1 PerfectInterpolantSequences, 2235/3840 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...