/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label01.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 15:33:12,820 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 15:33:12,823 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 15:33:12,849 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-18 15:33:12,858 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 15:33:12,859 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 15:33:12,860 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 15:33:12,861 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 15:33:12,862 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 15:33:12,863 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 15:33:12,864 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 15:33:12,866 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 15:33:12,868 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 15:33:12,869 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 15:33:12,870 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 15:33:12,871 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 15:33:12,873 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 15:33:12,880 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 15:33:12,881 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 15:33:12,885 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 15:33:12,886 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 [2020-08-18 15:33:12,934 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 15:33:12,934 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 15:33:12,936 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 15:33:12,936 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 15:33:12,936 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 15:33:12,936 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 15:33:12,937 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 15:33:12,937 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 15:33:12,937 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 15:33:12,937 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 15:33:12,937 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 15:33:12,937 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 15:33:12,938 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 15:33:12,938 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 15:33:12,938 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 15:33:12,938 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 15:33:12,938 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 15:33:12,939 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 15:33:12,942 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 15:33:12,942 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 15:33:12,942 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 15:33:12,943 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 15:33:12,943 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 15:33:12,943 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 15:33:12,943 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 15:33:12,943 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 15:33:12,944 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 15:33:12,946 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 15:33:12,946 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 15:33:12,946 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-08-18 15:33:13,282 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 15:33:13,295 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 15:33:13,298 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 15:33:13,300 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 15:33:13,300 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 15:33:13,301 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label01.c [2020-08-18 15:33:13,376 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/05ff36762/3f3b61914fda4971915d40c850c94bf2/FLAG309dd547e [2020-08-18 15:33:14,041 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 15:33:14,042 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem14_label01.c [2020-08-18 15:33:14,054 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/05ff36762/3f3b61914fda4971915d40c850c94bf2/FLAG309dd547e [2020-08-18 15:33:14,214 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/05ff36762/3f3b61914fda4971915d40c850c94bf2 [2020-08-18 15:33:14,225 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 15:33:14,227 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 15:33:14,228 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 15:33:14,228 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 15:33:14,232 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 15:33:14,233 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 03:33:14" (1/1) ... [2020-08-18 15:33:14,237 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ad15a05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:33:14, skipping insertion in model container [2020-08-18 15:33:14,237 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 03:33:14" (1/1) ... [2020-08-18 15:33:14,245 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 15:33:14,291 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 15:33:14,807 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 15:33:14,918 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 15:33:15,070 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 15:33:15,086 INFO L208 MainTranslator]: Completed translation [2020-08-18 15:33:15,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:33:15 WrapperNode [2020-08-18 15:33:15,087 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 15:33:15,088 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 15:33:15,088 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 15:33:15,088 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 15:33:15,102 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:33:15" (1/1) ... [2020-08-18 15:33:15,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:33:15" (1/1) ... [2020-08-18 15:33:15,122 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:33:15" (1/1) ... [2020-08-18 15:33:15,123 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:33:15" (1/1) ... [2020-08-18 15:33:15,180 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:33:15" (1/1) ... [2020-08-18 15:33:15,209 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:33:15" (1/1) ... [2020-08-18 15:33:15,219 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:33:15" (1/1) ... [2020-08-18 15:33:15,231 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 15:33:15,233 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 15:33:15,233 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 15:33:15,233 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 15:33:15,234 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:33:15" (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 [2020-08-18 15:33:15,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 15:33:15,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 15:33:15,309 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-08-18 15:33:15,309 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 15:33:15,309 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-08-18 15:33:15,310 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 15:33:15,310 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 15:33:15,311 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-18 15:33:15,311 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 15:33:15,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 15:33:15,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 15:33:16,777 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 15:33:16,778 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 15:33:16,784 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 03:33:16 BoogieIcfgContainer [2020-08-18 15:33:16,785 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 15:33:16,786 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 15:33:16,786 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 15:33:16,789 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 15:33:16,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 03:33:14" (1/3) ... [2020-08-18 15:33:16,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a88e79b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 03:33:16, skipping insertion in model container [2020-08-18 15:33:16,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:33:15" (2/3) ... [2020-08-18 15:33:16,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a88e79b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 03:33:16, skipping insertion in model container [2020-08-18 15:33:16,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 03:33:16" (3/3) ... [2020-08-18 15:33:16,793 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label01.c [2020-08-18 15:33:16,804 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 15:33:16,812 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 15:33:16,827 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 15:33:16,854 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 15:33:16,855 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 15:33:16,855 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 15:33:16,855 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 15:33:16,855 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 15:33:16,856 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 15:33:16,856 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 15:33:16,856 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 15:33:16,881 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2020-08-18 15:33:16,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-18 15:33:16,897 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:33:16,898 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:33:16,899 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:33:16,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:33:16,906 INFO L82 PathProgramCache]: Analyzing trace with hash -184228989, now seen corresponding path program 1 times [2020-08-18 15:33:16,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:33:16,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [738847150] [2020-08-18 15:33:16,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:33:17,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:17,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:33:17,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:17,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:33:17,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [738847150] [2020-08-18 15:33:17,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:33:17,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 15:33:17,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807186375] [2020-08-18 15:33:17,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 15:33:17,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:33:17,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 15:33:17,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 15:33:17,390 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2020-08-18 15:33:20,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:33:20,284 INFO L93 Difference]: Finished difference Result 886 states and 1612 transitions. [2020-08-18 15:33:20,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 15:33:20,287 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 60 [2020-08-18 15:33:20,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:33:20,307 INFO L225 Difference]: With dead ends: 886 [2020-08-18 15:33:20,308 INFO L226 Difference]: Without dead ends: 564 [2020-08-18 15:33:20,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-08-18 15:33:20,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-08-18 15:33:20,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 560. [2020-08-18 15:33:20,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 560 states. [2020-08-18 15:33:20,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 861 transitions. [2020-08-18 15:33:20,425 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 861 transitions. Word has length 60 [2020-08-18 15:33:20,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:33:20,425 INFO L479 AbstractCegarLoop]: Abstraction has 560 states and 861 transitions. [2020-08-18 15:33:20,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 15:33:20,426 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 861 transitions. [2020-08-18 15:33:20,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-08-18 15:33:20,434 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:33:20,435 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:33:20,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 15:33:20,435 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:33:20,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:33:20,436 INFO L82 PathProgramCache]: Analyzing trace with hash 2117260534, now seen corresponding path program 1 times [2020-08-18 15:33:20,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:33:20,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792537496] [2020-08-18 15:33:20,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:33:20,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:20,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:33:20,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:20,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 15:33:20,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:20,805 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:33:20,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792537496] [2020-08-18 15:33:20,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:33:20,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 15:33:20,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976916165] [2020-08-18 15:33:20,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 15:33:20,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:33:20,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 15:33:20,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 15:33:20,810 INFO L87 Difference]: Start difference. First operand 560 states and 861 transitions. Second operand 7 states. [2020-08-18 15:33:22,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:33:22,752 INFO L93 Difference]: Finished difference Result 1518 states and 2374 transitions. [2020-08-18 15:33:22,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 15:33:22,752 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 154 [2020-08-18 15:33:22,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:33:22,760 INFO L225 Difference]: With dead ends: 1518 [2020-08-18 15:33:22,761 INFO L226 Difference]: Without dead ends: 964 [2020-08-18 15:33:22,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-08-18 15:33:22,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2020-08-18 15:33:22,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 944. [2020-08-18 15:33:22,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 944 states. [2020-08-18 15:33:22,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1336 transitions. [2020-08-18 15:33:22,836 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1336 transitions. Word has length 154 [2020-08-18 15:33:22,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:33:22,840 INFO L479 AbstractCegarLoop]: Abstraction has 944 states and 1336 transitions. [2020-08-18 15:33:22,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 15:33:22,840 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1336 transitions. [2020-08-18 15:33:22,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-08-18 15:33:22,857 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:33:22,858 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:33:22,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 15:33:22,858 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:33:22,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:33:22,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1698067270, now seen corresponding path program 1 times [2020-08-18 15:33:22,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:33:22,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1948978549] [2020-08-18 15:33:22,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:33:22,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:23,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:33:23,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:23,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 15:33:23,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:23,291 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:33:23,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1948978549] [2020-08-18 15:33:23,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:33:23,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 15:33:23,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647147447] [2020-08-18 15:33:23,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 15:33:23,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:33:23,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 15:33:23,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-18 15:33:23,294 INFO L87 Difference]: Start difference. First operand 944 states and 1336 transitions. Second operand 8 states. [2020-08-18 15:33:25,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:33:25,273 INFO L93 Difference]: Finished difference Result 2490 states and 3798 transitions. [2020-08-18 15:33:25,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 15:33:25,276 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 200 [2020-08-18 15:33:25,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:33:25,293 INFO L225 Difference]: With dead ends: 2490 [2020-08-18 15:33:25,294 INFO L226 Difference]: Without dead ends: 1552 [2020-08-18 15:33:25,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-08-18 15:33:25,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1552 states. [2020-08-18 15:33:25,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1552 to 1518. [2020-08-18 15:33:25,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1518 states. [2020-08-18 15:33:25,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 2119 transitions. [2020-08-18 15:33:25,390 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 2119 transitions. Word has length 200 [2020-08-18 15:33:25,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:33:25,392 INFO L479 AbstractCegarLoop]: Abstraction has 1518 states and 2119 transitions. [2020-08-18 15:33:25,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 15:33:25,393 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 2119 transitions. [2020-08-18 15:33:25,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-08-18 15:33:25,399 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:33:25,399 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:33:25,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 15:33:25,400 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:33:25,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:33:25,401 INFO L82 PathProgramCache]: Analyzing trace with hash 328652488, now seen corresponding path program 1 times [2020-08-18 15:33:25,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:33:25,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [155937727] [2020-08-18 15:33:25,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:33:25,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:25,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:33:25,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:25,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 15:33:25,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:25,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-18 15:33:25,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:25,779 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 106 proven. 71 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 15:33:25,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [155937727] [2020-08-18 15:33:25,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:33:25,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 15:33:25,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428928553] [2020-08-18 15:33:25,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 15:33:25,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:33:25,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 15:33:25,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-18 15:33:25,782 INFO L87 Difference]: Start difference. First operand 1518 states and 2119 transitions. Second operand 8 states. [2020-08-18 15:33:27,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:33:27,505 INFO L93 Difference]: Finished difference Result 3412 states and 4693 transitions. [2020-08-18 15:33:27,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 15:33:27,506 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 219 [2020-08-18 15:33:27,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:33:27,515 INFO L225 Difference]: With dead ends: 3412 [2020-08-18 15:33:27,516 INFO L226 Difference]: Without dead ends: 1900 [2020-08-18 15:33:27,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-08-18 15:33:27,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1900 states. [2020-08-18 15:33:27,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1900 to 1890. [2020-08-18 15:33:27,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1890 states. [2020-08-18 15:33:27,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 2517 transitions. [2020-08-18 15:33:27,576 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 2517 transitions. Word has length 219 [2020-08-18 15:33:27,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:33:27,577 INFO L479 AbstractCegarLoop]: Abstraction has 1890 states and 2517 transitions. [2020-08-18 15:33:27,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 15:33:27,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 2517 transitions. [2020-08-18 15:33:27,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2020-08-18 15:33:27,583 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:33:27,583 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:33:27,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 15:33:27,584 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:33:27,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:33:27,584 INFO L82 PathProgramCache]: Analyzing trace with hash -56962879, now seen corresponding path program 1 times [2020-08-18 15:33:27,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:33:27,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286816888] [2020-08-18 15:33:27,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:33:27,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:27,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:33:27,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:27,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 15:33:27,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:27,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-18 15:33:27,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:27,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2020-08-18 15:33:28,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:28,255 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 193 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-18 15:33:28,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286816888] [2020-08-18 15:33:28,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:33:28,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 15:33:28,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324821563] [2020-08-18 15:33:28,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 15:33:28,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:33:28,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 15:33:28,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-18 15:33:28,258 INFO L87 Difference]: Start difference. First operand 1890 states and 2517 transitions. Second operand 9 states. [2020-08-18 15:33:30,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:33:30,741 INFO L93 Difference]: Finished difference Result 3677 states and 4968 transitions. [2020-08-18 15:33:30,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 15:33:30,742 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 303 [2020-08-18 15:33:30,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:33:30,753 INFO L225 Difference]: With dead ends: 3677 [2020-08-18 15:33:30,753 INFO L226 Difference]: Without dead ends: 1930 [2020-08-18 15:33:30,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-08-18 15:33:30,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-18 15:33:30,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1882. [2020-08-18 15:33:30,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1882 states. [2020-08-18 15:33:30,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 2280 transitions. [2020-08-18 15:33:30,814 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 2280 transitions. Word has length 303 [2020-08-18 15:33:30,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:33:30,816 INFO L479 AbstractCegarLoop]: Abstraction has 1882 states and 2280 transitions. [2020-08-18 15:33:30,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 15:33:30,816 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 2280 transitions. [2020-08-18 15:33:30,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2020-08-18 15:33:30,825 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:33:30,826 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:33:30,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 15:33:30,827 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:33:30,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:33:30,827 INFO L82 PathProgramCache]: Analyzing trace with hash -48667167, now seen corresponding path program 1 times [2020-08-18 15:33:30,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:33:30,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1074326494] [2020-08-18 15:33:30,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:33:30,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:31,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:33:31,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:31,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 15:33:31,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:31,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 15:33:31,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:31,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 15:33:31,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:31,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 310 [2020-08-18 15:33:31,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:31,472 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 438 proven. 11 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2020-08-18 15:33:31,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1074326494] [2020-08-18 15:33:31,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:33:31,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 15:33:31,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598874460] [2020-08-18 15:33:31,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 15:33:31,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:33:31,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 15:33:31,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-18 15:33:31,475 INFO L87 Difference]: Start difference. First operand 1882 states and 2280 transitions. Second operand 9 states. [2020-08-18 15:33:36,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:33:36,353 INFO L93 Difference]: Finished difference Result 5238 states and 6410 transitions. [2020-08-18 15:33:36,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-18 15:33:36,364 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 438 [2020-08-18 15:33:36,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:33:36,380 INFO L225 Difference]: With dead ends: 5238 [2020-08-18 15:33:36,380 INFO L226 Difference]: Without dead ends: 3356 [2020-08-18 15:33:36,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2020-08-18 15:33:36,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3356 states. [2020-08-18 15:33:36,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3356 to 2438. [2020-08-18 15:33:36,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2438 states. [2020-08-18 15:33:36,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2438 states to 2438 states and 2779 transitions. [2020-08-18 15:33:36,459 INFO L78 Accepts]: Start accepts. Automaton has 2438 states and 2779 transitions. Word has length 438 [2020-08-18 15:33:36,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:33:36,461 INFO L479 AbstractCegarLoop]: Abstraction has 2438 states and 2779 transitions. [2020-08-18 15:33:36,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 15:33:36,461 INFO L276 IsEmpty]: Start isEmpty. Operand 2438 states and 2779 transitions. [2020-08-18 15:33:36,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 559 [2020-08-18 15:33:36,475 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:33:36,476 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:33:36,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 15:33:36,476 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:33:36,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:33:36,477 INFO L82 PathProgramCache]: Analyzing trace with hash -347726080, now seen corresponding path program 1 times [2020-08-18 15:33:36,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:33:36,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724134152] [2020-08-18 15:33:36,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:33:36,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:36,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:33:36,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:36,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 15:33:36,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:36,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 15:33:36,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:36,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 15:33:36,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:36,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 300 [2020-08-18 15:33:36,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:37,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 412 [2020-08-18 15:33:37,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:37,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1167 backedges. 668 proven. 209 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2020-08-18 15:33:37,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724134152] [2020-08-18 15:33:37,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:33:37,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 15:33:37,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363660468] [2020-08-18 15:33:37,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 15:33:37,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:33:37,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 15:33:37,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-18 15:33:37,666 INFO L87 Difference]: Start difference. First operand 2438 states and 2779 transitions. Second operand 10 states. [2020-08-18 15:33:40,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:33:40,759 INFO L93 Difference]: Finished difference Result 5701 states and 6650 transitions. [2020-08-18 15:33:40,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 15:33:40,760 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 558 [2020-08-18 15:33:40,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:33:40,776 INFO L225 Difference]: With dead ends: 5701 [2020-08-18 15:33:40,776 INFO L226 Difference]: Without dead ends: 3400 [2020-08-18 15:33:40,782 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2020-08-18 15:33:40,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3400 states. [2020-08-18 15:33:40,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3400 to 3174. [2020-08-18 15:33:40,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3174 states. [2020-08-18 15:33:40,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3174 states to 3174 states and 3495 transitions. [2020-08-18 15:33:40,867 INFO L78 Accepts]: Start accepts. Automaton has 3174 states and 3495 transitions. Word has length 558 [2020-08-18 15:33:40,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:33:40,868 INFO L479 AbstractCegarLoop]: Abstraction has 3174 states and 3495 transitions. [2020-08-18 15:33:40,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 15:33:40,868 INFO L276 IsEmpty]: Start isEmpty. Operand 3174 states and 3495 transitions. [2020-08-18 15:33:40,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 592 [2020-08-18 15:33:40,884 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:33:40,885 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:33:40,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 15:33:40,886 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:33:40,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:33:40,886 INFO L82 PathProgramCache]: Analyzing trace with hash -229639858, now seen corresponding path program 1 times [2020-08-18 15:33:40,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:33:40,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1121482604] [2020-08-18 15:33:40,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:33:40,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:41,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:33:41,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:41,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 15:33:41,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:41,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 15:33:41,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:41,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 15:33:41,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:41,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 360 [2020-08-18 15:33:41,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:41,985 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 439 proven. 136 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2020-08-18 15:33:41,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1121482604] [2020-08-18 15:33:41,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:33:41,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 15:33:41,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176344989] [2020-08-18 15:33:41,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 15:33:41,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:33:41,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 15:33:41,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-18 15:33:41,988 INFO L87 Difference]: Start difference. First operand 3174 states and 3495 transitions. Second operand 10 states. [2020-08-18 15:33:45,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:33:45,034 INFO L93 Difference]: Finished difference Result 5994 states and 6643 transitions. [2020-08-18 15:33:45,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 15:33:45,035 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 591 [2020-08-18 15:33:45,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:33:45,048 INFO L225 Difference]: With dead ends: 5994 [2020-08-18 15:33:45,049 INFO L226 Difference]: Without dead ends: 3192 [2020-08-18 15:33:45,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2020-08-18 15:33:45,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3192 states. [2020-08-18 15:33:45,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3192 to 3178. [2020-08-18 15:33:45,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3178 states. [2020-08-18 15:33:45,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 3486 transitions. [2020-08-18 15:33:45,130 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 3486 transitions. Word has length 591 [2020-08-18 15:33:45,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:33:45,131 INFO L479 AbstractCegarLoop]: Abstraction has 3178 states and 3486 transitions. [2020-08-18 15:33:45,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 15:33:45,131 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 3486 transitions. [2020-08-18 15:33:45,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 702 [2020-08-18 15:33:45,140 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:33:45,141 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:33:45,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 15:33:45,141 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:33:45,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:33:45,142 INFO L82 PathProgramCache]: Analyzing trace with hash -278736799, now seen corresponding path program 2 times [2020-08-18 15:33:45,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:33:45,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1088593748] [2020-08-18 15:33:45,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:33:45,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:45,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:33:45,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:45,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 15:33:45,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:45,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 15:33:45,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:45,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 15:33:45,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:45,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 337 [2020-08-18 15:33:45,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:45,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 470 [2020-08-18 15:33:45,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:46,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1384 backedges. 609 proven. 140 refuted. 0 times theorem prover too weak. 635 trivial. 0 not checked. [2020-08-18 15:33:46,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1088593748] [2020-08-18 15:33:46,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:33:46,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 15:33:46,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770124087] [2020-08-18 15:33:46,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 15:33:46,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:33:46,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 15:33:46,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-18 15:33:46,594 INFO L87 Difference]: Start difference. First operand 3178 states and 3486 transitions. Second operand 9 states. [2020-08-18 15:33:49,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:33:49,070 INFO L93 Difference]: Finished difference Result 6354 states and 6982 transitions. [2020-08-18 15:33:49,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 15:33:49,071 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 701 [2020-08-18 15:33:49,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:33:49,087 INFO L225 Difference]: With dead ends: 6354 [2020-08-18 15:33:49,087 INFO L226 Difference]: Without dead ends: 3364 [2020-08-18 15:33:49,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-08-18 15:33:49,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3364 states. [2020-08-18 15:33:49,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3364 to 3178. [2020-08-18 15:33:49,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3178 states. [2020-08-18 15:33:49,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 3484 transitions. [2020-08-18 15:33:49,165 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 3484 transitions. Word has length 701 [2020-08-18 15:33:49,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:33:49,166 INFO L479 AbstractCegarLoop]: Abstraction has 3178 states and 3484 transitions. [2020-08-18 15:33:49,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 15:33:49,166 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 3484 transitions. [2020-08-18 15:33:49,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 709 [2020-08-18 15:33:49,174 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:33:49,175 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:33:49,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 15:33:49,175 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:33:49,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:33:49,176 INFO L82 PathProgramCache]: Analyzing trace with hash -638310518, now seen corresponding path program 1 times [2020-08-18 15:33:49,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:33:49,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [5521151] [2020-08-18 15:33:49,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:33:49,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:49,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:33:49,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:49,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 15:33:49,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:49,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 15:33:49,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:49,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 15:33:49,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:49,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-18 15:33:49,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:49,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 477 [2020-08-18 15:33:49,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:50,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1398 backedges. 616 proven. 140 refuted. 0 times theorem prover too weak. 642 trivial. 0 not checked. [2020-08-18 15:33:50,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [5521151] [2020-08-18 15:33:50,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:33:50,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 15:33:50,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218295923] [2020-08-18 15:33:50,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 15:33:50,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:33:50,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 15:33:50,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-18 15:33:50,761 INFO L87 Difference]: Start difference. First operand 3178 states and 3484 transitions. Second operand 10 states. [2020-08-18 15:33:54,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:33:54,212 INFO L93 Difference]: Finished difference Result 6540 states and 7200 transitions. [2020-08-18 15:33:54,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 15:33:54,219 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 708 [2020-08-18 15:33:54,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:33:54,233 INFO L225 Difference]: With dead ends: 6540 [2020-08-18 15:33:54,233 INFO L226 Difference]: Without dead ends: 3552 [2020-08-18 15:33:54,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2020-08-18 15:33:54,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3552 states. [2020-08-18 15:33:54,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3552 to 3548. [2020-08-18 15:33:54,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3548 states. [2020-08-18 15:33:54,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3548 states to 3548 states and 3869 transitions. [2020-08-18 15:33:54,311 INFO L78 Accepts]: Start accepts. Automaton has 3548 states and 3869 transitions. Word has length 708 [2020-08-18 15:33:54,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:33:54,313 INFO L479 AbstractCegarLoop]: Abstraction has 3548 states and 3869 transitions. [2020-08-18 15:33:54,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 15:33:54,313 INFO L276 IsEmpty]: Start isEmpty. Operand 3548 states and 3869 transitions. [2020-08-18 15:33:54,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 735 [2020-08-18 15:33:54,323 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:33:54,324 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:33:54,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 15:33:54,324 INFO L427 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:33:54,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:33:54,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1537329314, now seen corresponding path program 1 times [2020-08-18 15:33:54,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:33:54,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [287491512] [2020-08-18 15:33:54,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:33:54,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:54,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:33:54,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:54,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 15:33:54,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:54,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 15:33:54,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:54,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 15:33:54,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:54,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-18 15:33:54,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:54,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-08-18 15:33:54,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:55,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1424 backedges. 763 proven. 2 refuted. 0 times theorem prover too weak. 659 trivial. 0 not checked. [2020-08-18 15:33:55,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [287491512] [2020-08-18 15:33:55,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:33:55,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 15:33:55,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815226832] [2020-08-18 15:33:55,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 15:33:55,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:33:55,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 15:33:55,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 15:33:55,427 INFO L87 Difference]: Start difference. First operand 3548 states and 3869 transitions. Second operand 7 states. [2020-08-18 15:33:56,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:33:56,828 INFO L93 Difference]: Finished difference Result 8032 states and 8890 transitions. [2020-08-18 15:33:56,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 15:33:56,829 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 734 [2020-08-18 15:33:56,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:33:56,847 INFO L225 Difference]: With dead ends: 8032 [2020-08-18 15:33:56,847 INFO L226 Difference]: Without dead ends: 4674 [2020-08-18 15:33:56,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-08-18 15:33:56,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4674 states. [2020-08-18 15:33:56,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4674 to 4292. [2020-08-18 15:33:56,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4292 states. [2020-08-18 15:33:56,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4292 states to 4292 states and 4750 transitions. [2020-08-18 15:33:56,940 INFO L78 Accepts]: Start accepts. Automaton has 4292 states and 4750 transitions. Word has length 734 [2020-08-18 15:33:56,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:33:56,941 INFO L479 AbstractCegarLoop]: Abstraction has 4292 states and 4750 transitions. [2020-08-18 15:33:56,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 15:33:56,942 INFO L276 IsEmpty]: Start isEmpty. Operand 4292 states and 4750 transitions. [2020-08-18 15:33:56,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 790 [2020-08-18 15:33:56,952 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:33:56,953 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:33:56,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 15:33:56,953 INFO L427 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:33:56,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:33:56,954 INFO L82 PathProgramCache]: Analyzing trace with hash -583849898, now seen corresponding path program 1 times [2020-08-18 15:33:56,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:33:56,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [911945690] [2020-08-18 15:33:56,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:33:57,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:57,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:33:57,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:57,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 15:33:57,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:57,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 15:33:57,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:57,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 15:33:57,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:57,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-18 15:33:57,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:57,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 425 [2020-08-18 15:33:57,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:57,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 558 [2020-08-18 15:33:57,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:57,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1856 backedges. 327 proven. 6 refuted. 0 times theorem prover too weak. 1523 trivial. 0 not checked. [2020-08-18 15:33:57,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [911945690] [2020-08-18 15:33:57,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:33:57,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 15:33:57,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902740617] [2020-08-18 15:33:57,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 15:33:57,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:33:57,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 15:33:57,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 15:33:57,746 INFO L87 Difference]: Start difference. First operand 4292 states and 4750 transitions. Second operand 5 states. [2020-08-18 15:33:59,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:33:59,017 INFO L93 Difference]: Finished difference Result 4296 states and 4753 transitions. [2020-08-18 15:33:59,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 15:33:59,018 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 789 [2020-08-18 15:33:59,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:33:59,033 INFO L225 Difference]: With dead ends: 4296 [2020-08-18 15:33:59,033 INFO L226 Difference]: Without dead ends: 4294 [2020-08-18 15:33:59,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-08-18 15:33:59,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4294 states. [2020-08-18 15:33:59,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4294 to 4292. [2020-08-18 15:33:59,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4292 states. [2020-08-18 15:33:59,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4292 states to 4292 states and 4747 transitions. [2020-08-18 15:33:59,112 INFO L78 Accepts]: Start accepts. Automaton has 4292 states and 4747 transitions. Word has length 789 [2020-08-18 15:33:59,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:33:59,113 INFO L479 AbstractCegarLoop]: Abstraction has 4292 states and 4747 transitions. [2020-08-18 15:33:59,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 15:33:59,113 INFO L276 IsEmpty]: Start isEmpty. Operand 4292 states and 4747 transitions. [2020-08-18 15:33:59,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 835 [2020-08-18 15:33:59,127 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:33:59,127 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:33:59,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 15:33:59,128 INFO L427 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:33:59,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:33:59,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1874704500, now seen corresponding path program 1 times [2020-08-18 15:33:59,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:33:59,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1273627149] [2020-08-18 15:33:59,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:33:59,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:59,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:33:59,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:59,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 15:33:59,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:59,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 15:33:59,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:59,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 15:33:59,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:59,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-18 15:33:59,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:59,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-08-18 15:33:59,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:59,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 576 [2020-08-18 15:33:59,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:59,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 688 [2020-08-18 15:33:59,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:59,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2386 backedges. 382 proven. 7 refuted. 0 times theorem prover too weak. 1997 trivial. 0 not checked. [2020-08-18 15:33:59,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1273627149] [2020-08-18 15:33:59,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:33:59,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 15:33:59,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632646843] [2020-08-18 15:33:59,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 15:33:59,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:33:59,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 15:33:59,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 15:33:59,950 INFO L87 Difference]: Start difference. First operand 4292 states and 4747 transitions. Second operand 5 states. [2020-08-18 15:34:01,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:34:01,221 INFO L93 Difference]: Finished difference Result 9128 states and 10168 transitions. [2020-08-18 15:34:01,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 15:34:01,222 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 834 [2020-08-18 15:34:01,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:34:01,237 INFO L225 Difference]: With dead ends: 9128 [2020-08-18 15:34:01,237 INFO L226 Difference]: Without dead ends: 5026 [2020-08-18 15:34:01,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-08-18 15:34:01,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5026 states. [2020-08-18 15:34:01,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5026 to 3918. [2020-08-18 15:34:01,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3918 states. [2020-08-18 15:34:01,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3918 states to 3918 states and 4287 transitions. [2020-08-18 15:34:01,325 INFO L78 Accepts]: Start accepts. Automaton has 3918 states and 4287 transitions. Word has length 834 [2020-08-18 15:34:01,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:34:01,326 INFO L479 AbstractCegarLoop]: Abstraction has 3918 states and 4287 transitions. [2020-08-18 15:34:01,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 15:34:01,326 INFO L276 IsEmpty]: Start isEmpty. Operand 3918 states and 4287 transitions. [2020-08-18 15:34:01,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 846 [2020-08-18 15:34:01,341 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:34:01,342 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:34:01,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 15:34:01,343 INFO L427 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:34:01,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:34:01,343 INFO L82 PathProgramCache]: Analyzing trace with hash -177347705, now seen corresponding path program 1 times [2020-08-18 15:34:01,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:34:01,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [740331755] [2020-08-18 15:34:01,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:34:01,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:34:01,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:34:01,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:34:01,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 15:34:01,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:34:01,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 15:34:01,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:34:01,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 15:34:01,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:34:01,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-18 15:34:01,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:34:01,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-08-18 15:34:01,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:34:01,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 576 [2020-08-18 15:34:01,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:34:01,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 688 [2020-08-18 15:34:01,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:34:02,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2441 backedges. 379 proven. 28 refuted. 0 times theorem prover too weak. 2034 trivial. 0 not checked. [2020-08-18 15:34:02,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [740331755] [2020-08-18 15:34:02,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:34:02,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 15:34:02,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027076286] [2020-08-18 15:34:02,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 15:34:02,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:34:02,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 15:34:02,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-18 15:34:02,278 INFO L87 Difference]: Start difference. First operand 3918 states and 4287 transitions. Second operand 8 states. [2020-08-18 15:34:05,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:34:05,367 INFO L93 Difference]: Finished difference Result 5032 states and 5532 transitions. [2020-08-18 15:34:05,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 15:34:05,373 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 845 [2020-08-18 15:34:05,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:34:05,375 INFO L225 Difference]: With dead ends: 5032 [2020-08-18 15:34:05,375 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 15:34:05,382 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-08-18 15:34:05,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 15:34:05,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 15:34:05,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 15:34:05,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 15:34:05,383 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 845 [2020-08-18 15:34:05,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:34:05,383 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 15:34:05,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 15:34:05,384 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 15:34:05,384 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 15:34:05,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 15:34:05,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 15:34:05,919 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 177 [2020-08-18 15:34:06,109 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 177 [2020-08-18 15:34:07,631 WARN L193 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 250 DAG size of output: 61 [2020-08-18 15:34:08,691 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 183 DAG size of output: 55