/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label36.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 22:48:12,725 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-18 22:48:12,768 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 22:48:12,769 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 22:48:12,770 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 22:48:12,771 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 22:48:12,772 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 22:48:12,773 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 22:48:12,774 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 22:48:12,776 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 22:48:12,778 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 22:48:12,779 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 22:48:12,780 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 22:48:12,781 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 22:48:12,783 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 22:48:12,791 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 22:48:12,792 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 22:48:12,792 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 22:48:12,793 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 22:48:12,816 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 22:48:12,817 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 22:48:12,818 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 22:48:12,818 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 22:48:12,818 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 22:48:12,818 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 22:48:12,819 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 22:48:12,819 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 22:48:12,819 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 22:48:12,819 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 22:48:12,819 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 22:48:12,820 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 22:48:12,820 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 22:48:12,820 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 22:48:12,820 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 22:48:12,820 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 22:48:12,821 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 22:48:12,821 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 22:48:12,821 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 22:48:12,821 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 22:48:12,821 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 22:48:12,822 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 22:48:12,822 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 22:48:12,822 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 22:48:12,822 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 22:48:12,822 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 22:48:12,823 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 22:48:12,823 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 22:48:12,823 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 22:48:12,823 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDEST; [2020-08-18 22:48:13,131 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 22:48:13,144 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 22:48:13,148 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 22:48:13,149 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 22:48:13,150 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 22:48:13,150 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label36.c [2020-08-18 22:48:13,210 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c0e531e9d/f80dece5fa95466089a0ff35019589df/FLAG6e6b054ed [2020-08-18 22:48:13,753 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 22:48:13,754 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem14_label36.c [2020-08-18 22:48:13,768 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c0e531e9d/f80dece5fa95466089a0ff35019589df/FLAG6e6b054ed [2020-08-18 22:48:14,014 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c0e531e9d/f80dece5fa95466089a0ff35019589df [2020-08-18 22:48:14,024 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 22:48:14,026 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 22:48:14,031 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 22:48:14,031 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 22:48:14,035 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 22:48:14,036 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:48:14" (1/1) ... [2020-08-18 22:48:14,040 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1808924a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:48:14, skipping insertion in model container [2020-08-18 22:48:14,040 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:48:14" (1/1) ... [2020-08-18 22:48:14,049 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 22:48:14,115 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 22:48:14,654 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:48:14,664 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 22:48:15,072 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:48:15,095 INFO L208 MainTranslator]: Completed translation [2020-08-18 22:48:15,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:48:15 WrapperNode [2020-08-18 22:48:15,096 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 22:48:15,097 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 22:48:15,097 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 22:48:15,098 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 22:48:15,116 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:48:15" (1/1) ... [2020-08-18 22:48:15,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:48:15" (1/1) ... [2020-08-18 22:48:15,137 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:48:15" (1/1) ... [2020-08-18 22:48:15,137 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:48:15" (1/1) ... [2020-08-18 22:48:15,197 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:48:15" (1/1) ... [2020-08-18 22:48:15,230 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:48:15" (1/1) ... [2020-08-18 22:48:15,249 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:48:15" (1/1) ... [2020-08-18 22:48:15,261 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 22:48:15,262 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 22:48:15,262 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 22:48:15,262 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 22:48:15,263 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:48:15" (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 22:48:15,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 22:48:15,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 22:48:15,345 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-08-18 22:48:15,345 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 22:48:15,346 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-08-18 22:48:15,346 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 22:48:15,346 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 22:48:15,347 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-18 22:48:15,347 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 22:48:15,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 22:48:15,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 22:48:16,979 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 22:48:16,980 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 22:48:16,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:48:16 BoogieIcfgContainer [2020-08-18 22:48:16,987 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 22:48:16,989 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 22:48:16,989 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 22:48:16,993 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 22:48:16,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 10:48:14" (1/3) ... [2020-08-18 22:48:16,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b7fd4da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:48:16, skipping insertion in model container [2020-08-18 22:48:16,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:48:15" (2/3) ... [2020-08-18 22:48:16,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b7fd4da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:48:16, skipping insertion in model container [2020-08-18 22:48:16,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:48:16" (3/3) ... [2020-08-18 22:48:16,998 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label36.c [2020-08-18 22:48:17,011 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 22:48:17,021 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 22:48:17,038 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 22:48:17,070 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 22:48:17,071 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 22:48:17,071 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 22:48:17,071 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 22:48:17,071 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 22:48:17,072 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 22:48:17,072 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 22:48:17,072 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 22:48:17,111 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2020-08-18 22:48:17,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-18 22:48:17,126 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:48:17,128 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] [2020-08-18 22:48:17,128 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:48:17,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:48:17,138 INFO L82 PathProgramCache]: Analyzing trace with hash 406410443, now seen corresponding path program 1 times [2020-08-18 22:48:17,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:48:17,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2046574401] [2020-08-18 22:48:17,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:48:17,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:17,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:48:17,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:17,689 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 22:48:17,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2046574401] [2020-08-18 22:48:17,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:48:17,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 22:48:17,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252897230] [2020-08-18 22:48:17,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:48:17,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:48:17,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:48:17,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:48:17,726 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2020-08-18 22:48:20,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:48:20,549 INFO L93 Difference]: Finished difference Result 886 states and 1612 transitions. [2020-08-18 22:48:20,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 22:48:20,552 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-08-18 22:48:20,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:48:20,593 INFO L225 Difference]: With dead ends: 886 [2020-08-18 22:48:20,593 INFO L226 Difference]: Without dead ends: 564 [2020-08-18 22:48:20,602 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 22:48:20,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-08-18 22:48:20,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 560. [2020-08-18 22:48:20,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 560 states. [2020-08-18 22:48:20,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 861 transitions. [2020-08-18 22:48:20,729 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 861 transitions. Word has length 54 [2020-08-18 22:48:20,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:48:20,730 INFO L479 AbstractCegarLoop]: Abstraction has 560 states and 861 transitions. [2020-08-18 22:48:20,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:48:20,730 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 861 transitions. [2020-08-18 22:48:20,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-08-18 22:48:20,742 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:48:20,743 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:48:20,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 22:48:20,744 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:48:20,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:48:20,745 INFO L82 PathProgramCache]: Analyzing trace with hash -724645666, now seen corresponding path program 1 times [2020-08-18 22:48:20,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:48:20,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1454737856] [2020-08-18 22:48:20,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:48:20,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:20,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:48:20,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:20,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 22:48:20,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:21,026 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:48:21,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1454737856] [2020-08-18 22:48:21,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:48:21,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 22:48:21,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605124146] [2020-08-18 22:48:21,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 22:48:21,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:48:21,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 22:48:21,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 22:48:21,030 INFO L87 Difference]: Start difference. First operand 560 states and 861 transitions. Second operand 7 states. [2020-08-18 22:48:23,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:48:23,037 INFO L93 Difference]: Finished difference Result 1518 states and 2374 transitions. [2020-08-18 22:48:23,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 22:48:23,038 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 148 [2020-08-18 22:48:23,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:48:23,046 INFO L225 Difference]: With dead ends: 1518 [2020-08-18 22:48:23,046 INFO L226 Difference]: Without dead ends: 964 [2020-08-18 22:48:23,049 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 22:48:23,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2020-08-18 22:48:23,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 944. [2020-08-18 22:48:23,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 944 states. [2020-08-18 22:48:23,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1336 transitions. [2020-08-18 22:48:23,104 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1336 transitions. Word has length 148 [2020-08-18 22:48:23,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:48:23,105 INFO L479 AbstractCegarLoop]: Abstraction has 944 states and 1336 transitions. [2020-08-18 22:48:23,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 22:48:23,105 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1336 transitions. [2020-08-18 22:48:23,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-08-18 22:48:23,111 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:48:23,112 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:48:23,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 22:48:23,112 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:48:23,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:48:23,113 INFO L82 PathProgramCache]: Analyzing trace with hash 2026240930, now seen corresponding path program 1 times [2020-08-18 22:48:23,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:48:23,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [709456590] [2020-08-18 22:48:23,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:48:23,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:23,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:48:23,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:23,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 22:48:23,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:23,460 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:48:23,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [709456590] [2020-08-18 22:48:23,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:48:23,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 22:48:23,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632500651] [2020-08-18 22:48:23,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 22:48:23,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:48:23,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 22:48:23,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-18 22:48:23,466 INFO L87 Difference]: Start difference. First operand 944 states and 1336 transitions. Second operand 8 states. [2020-08-18 22:48:25,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:48:25,509 INFO L93 Difference]: Finished difference Result 2490 states and 3798 transitions. [2020-08-18 22:48:25,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 22:48:25,510 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 194 [2020-08-18 22:48:25,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:48:25,522 INFO L225 Difference]: With dead ends: 2490 [2020-08-18 22:48:25,522 INFO L226 Difference]: Without dead ends: 1552 [2020-08-18 22:48:25,525 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 22:48:25,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1552 states. [2020-08-18 22:48:25,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1552 to 1518. [2020-08-18 22:48:25,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1518 states. [2020-08-18 22:48:25,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 2119 transitions. [2020-08-18 22:48:25,592 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 2119 transitions. Word has length 194 [2020-08-18 22:48:25,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:48:25,593 INFO L479 AbstractCegarLoop]: Abstraction has 1518 states and 2119 transitions. [2020-08-18 22:48:25,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 22:48:25,594 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 2119 transitions. [2020-08-18 22:48:25,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-08-18 22:48:25,599 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:48:25,599 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, 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] [2020-08-18 22:48:25,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 22:48:25,600 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:48:25,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:48:25,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1200176176, now seen corresponding path program 1 times [2020-08-18 22:48:25,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:48:25,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [401935877] [2020-08-18 22:48:25,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:48:25,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:25,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:48:25,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:25,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 22:48:25,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:25,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-18 22:48:25,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:25,935 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 94 proven. 71 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 22:48:25,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [401935877] [2020-08-18 22:48:25,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:48:25,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 22:48:25,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956782127] [2020-08-18 22:48:25,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 22:48:25,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:48:25,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 22:48:25,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-18 22:48:25,940 INFO L87 Difference]: Start difference. First operand 1518 states and 2119 transitions. Second operand 8 states. [2020-08-18 22:48:27,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:48:27,758 INFO L93 Difference]: Finished difference Result 3412 states and 4693 transitions. [2020-08-18 22:48:27,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 22:48:27,759 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 213 [2020-08-18 22:48:27,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:48:27,772 INFO L225 Difference]: With dead ends: 3412 [2020-08-18 22:48:27,773 INFO L226 Difference]: Without dead ends: 1900 [2020-08-18 22:48:27,779 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 22:48:27,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1900 states. [2020-08-18 22:48:27,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1900 to 1890. [2020-08-18 22:48:27,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1890 states. [2020-08-18 22:48:27,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 2517 transitions. [2020-08-18 22:48:27,878 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 2517 transitions. Word has length 213 [2020-08-18 22:48:27,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:48:27,879 INFO L479 AbstractCegarLoop]: Abstraction has 1890 states and 2517 transitions. [2020-08-18 22:48:27,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 22:48:27,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 2517 transitions. [2020-08-18 22:48:27,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2020-08-18 22:48:27,885 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:48:27,885 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:48:27,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 22:48:27,888 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:48:27,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:48:27,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1683146711, now seen corresponding path program 1 times [2020-08-18 22:48:27,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:48:27,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1073697638] [2020-08-18 22:48:27,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:48:27,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:28,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:48:28,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:28,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 22:48:28,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:28,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-18 22:48:28,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:28,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2020-08-18 22:48:28,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:28,718 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 175 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-18 22:48:28,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1073697638] [2020-08-18 22:48:28,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:48:28,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 22:48:28,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408449011] [2020-08-18 22:48:28,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 22:48:28,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:48:28,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 22:48:28,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-18 22:48:28,723 INFO L87 Difference]: Start difference. First operand 1890 states and 2517 transitions. Second operand 9 states. [2020-08-18 22:48:31,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:48:31,369 INFO L93 Difference]: Finished difference Result 3677 states and 4968 transitions. [2020-08-18 22:48:31,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 22:48:31,370 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 297 [2020-08-18 22:48:31,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:48:31,381 INFO L225 Difference]: With dead ends: 3677 [2020-08-18 22:48:31,381 INFO L226 Difference]: Without dead ends: 1930 [2020-08-18 22:48:31,386 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 22:48:31,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-18 22:48:31,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1882. [2020-08-18 22:48:31,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1882 states. [2020-08-18 22:48:31,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 2280 transitions. [2020-08-18 22:48:31,446 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 2280 transitions. Word has length 297 [2020-08-18 22:48:31,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:48:31,447 INFO L479 AbstractCegarLoop]: Abstraction has 1882 states and 2280 transitions. [2020-08-18 22:48:31,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 22:48:31,447 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 2280 transitions. [2020-08-18 22:48:31,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2020-08-18 22:48:31,456 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:48:31,456 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, 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, 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 22:48:31,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 22:48:31,457 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:48:31,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:48:31,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1242283415, now seen corresponding path program 1 times [2020-08-18 22:48:31,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:48:31,458 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1549841584] [2020-08-18 22:48:31,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:48:31,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:31,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:48:31,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:31,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 22:48:31,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:31,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 22:48:31,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:31,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 22:48:31,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:31,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 310 [2020-08-18 22:48:31,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:32,114 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 414 proven. 11 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2020-08-18 22:48:32,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1549841584] [2020-08-18 22:48:32,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:48:32,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 22:48:32,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559344384] [2020-08-18 22:48:32,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 22:48:32,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:48:32,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 22:48:32,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-18 22:48:32,127 INFO L87 Difference]: Start difference. First operand 1882 states and 2280 transitions. Second operand 9 states. [2020-08-18 22:48:36,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:48:36,598 INFO L93 Difference]: Finished difference Result 5238 states and 6410 transitions. [2020-08-18 22:48:36,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-18 22:48:36,598 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 432 [2020-08-18 22:48:36,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:48:36,617 INFO L225 Difference]: With dead ends: 5238 [2020-08-18 22:48:36,618 INFO L226 Difference]: Without dead ends: 3356 [2020-08-18 22:48:36,625 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 22:48:36,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3356 states. [2020-08-18 22:48:36,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3356 to 2438. [2020-08-18 22:48:36,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2438 states. [2020-08-18 22:48:36,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2438 states to 2438 states and 2779 transitions. [2020-08-18 22:48:36,713 INFO L78 Accepts]: Start accepts. Automaton has 2438 states and 2779 transitions. Word has length 432 [2020-08-18 22:48:36,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:48:36,715 INFO L479 AbstractCegarLoop]: Abstraction has 2438 states and 2779 transitions. [2020-08-18 22:48:36,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 22:48:36,715 INFO L276 IsEmpty]: Start isEmpty. Operand 2438 states and 2779 transitions. [2020-08-18 22:48:36,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2020-08-18 22:48:36,734 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:48:36,735 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, 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, 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 22:48:36,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 22:48:36,735 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:48:36,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:48:36,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1681885400, now seen corresponding path program 1 times [2020-08-18 22:48:36,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:48:36,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [572857281] [2020-08-18 22:48:36,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:48:36,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:37,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:48:37,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:37,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 22:48:37,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:37,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 22:48:37,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:37,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 22:48:37,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:37,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 300 [2020-08-18 22:48:37,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:37,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 412 [2020-08-18 22:48:37,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:38,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1137 backedges. 638 proven. 209 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2020-08-18 22:48:38,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [572857281] [2020-08-18 22:48:38,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:48:38,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 22:48:38,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133142549] [2020-08-18 22:48:38,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 22:48:38,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:48:38,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 22:48:38,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-18 22:48:38,089 INFO L87 Difference]: Start difference. First operand 2438 states and 2779 transitions. Second operand 10 states. [2020-08-18 22:48:41,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:48:41,195 INFO L93 Difference]: Finished difference Result 5701 states and 6650 transitions. [2020-08-18 22:48:41,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 22:48:41,196 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 552 [2020-08-18 22:48:41,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:48:41,213 INFO L225 Difference]: With dead ends: 5701 [2020-08-18 22:48:41,213 INFO L226 Difference]: Without dead ends: 3400 [2020-08-18 22:48:41,221 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 22:48:41,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3400 states. [2020-08-18 22:48:41,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3400 to 3174. [2020-08-18 22:48:41,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3174 states. [2020-08-18 22:48:41,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3174 states to 3174 states and 3494 transitions. [2020-08-18 22:48:41,301 INFO L78 Accepts]: Start accepts. Automaton has 3174 states and 3494 transitions. Word has length 552 [2020-08-18 22:48:41,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:48:41,302 INFO L479 AbstractCegarLoop]: Abstraction has 3174 states and 3494 transitions. [2020-08-18 22:48:41,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 22:48:41,302 INFO L276 IsEmpty]: Start isEmpty. Operand 3174 states and 3494 transitions. [2020-08-18 22:48:41,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 586 [2020-08-18 22:48:41,319 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:48:41,320 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, 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, 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 22:48:41,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 22:48:41,321 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:48:41,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:48:41,321 INFO L82 PathProgramCache]: Analyzing trace with hash 60264982, now seen corresponding path program 1 times [2020-08-18 22:48:41,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:48:41,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1316869421] [2020-08-18 22:48:41,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:48:41,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:41,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:48:41,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:41,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 22:48:41,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:41,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 22:48:41,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:41,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 22:48:41,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:41,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 360 [2020-08-18 22:48:41,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:42,536 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 415 proven. 136 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2020-08-18 22:48:42,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1316869421] [2020-08-18 22:48:42,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:48:42,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 22:48:42,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354544559] [2020-08-18 22:48:42,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 22:48:42,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:48:42,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 22:48:42,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-18 22:48:42,539 INFO L87 Difference]: Start difference. First operand 3174 states and 3494 transitions. Second operand 10 states. [2020-08-18 22:48:45,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:48:45,532 INFO L93 Difference]: Finished difference Result 5994 states and 6641 transitions. [2020-08-18 22:48:45,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 22:48:45,532 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 585 [2020-08-18 22:48:45,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:48:45,549 INFO L225 Difference]: With dead ends: 5994 [2020-08-18 22:48:45,549 INFO L226 Difference]: Without dead ends: 3192 [2020-08-18 22:48:45,557 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 22:48:45,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3192 states. [2020-08-18 22:48:45,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3192 to 3178. [2020-08-18 22:48:45,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3178 states. [2020-08-18 22:48:45,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 3485 transitions. [2020-08-18 22:48:45,642 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 3485 transitions. Word has length 585 [2020-08-18 22:48:45,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:48:45,643 INFO L479 AbstractCegarLoop]: Abstraction has 3178 states and 3485 transitions. [2020-08-18 22:48:45,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 22:48:45,643 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 3485 transitions. [2020-08-18 22:48:45,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 696 [2020-08-18 22:48:45,654 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:48:45,655 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, 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, 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 22:48:45,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 22:48:45,658 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:48:45,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:48:45,658 INFO L82 PathProgramCache]: Analyzing trace with hash 762745801, now seen corresponding path program 2 times [2020-08-18 22:48:45,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:48:45,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1341239676] [2020-08-18 22:48:45,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:48:45,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:46,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:48:46,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:46,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 22:48:46,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:46,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 22:48:46,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:46,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 22:48:46,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:46,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 337 [2020-08-18 22:48:46,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:46,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 470 [2020-08-18 22:48:46,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:47,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1354 backedges. 579 proven. 140 refuted. 0 times theorem prover too weak. 635 trivial. 0 not checked. [2020-08-18 22:48:47,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1341239676] [2020-08-18 22:48:47,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:48:47,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 22:48:47,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403576304] [2020-08-18 22:48:47,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 22:48:47,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:48:47,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 22:48:47,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-18 22:48:47,259 INFO L87 Difference]: Start difference. First operand 3178 states and 3485 transitions. Second operand 9 states. [2020-08-18 22:48:49,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:48:49,714 INFO L93 Difference]: Finished difference Result 6354 states and 6980 transitions. [2020-08-18 22:48:49,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 22:48:49,715 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 695 [2020-08-18 22:48:49,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:48:49,730 INFO L225 Difference]: With dead ends: 6354 [2020-08-18 22:48:49,730 INFO L226 Difference]: Without dead ends: 3364 [2020-08-18 22:48:49,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-08-18 22:48:49,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3364 states. [2020-08-18 22:48:49,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3364 to 3178. [2020-08-18 22:48:49,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3178 states. [2020-08-18 22:48:49,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 3483 transitions. [2020-08-18 22:48:49,811 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 3483 transitions. Word has length 695 [2020-08-18 22:48:49,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:48:49,812 INFO L479 AbstractCegarLoop]: Abstraction has 3178 states and 3483 transitions. [2020-08-18 22:48:49,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 22:48:49,813 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 3483 transitions. [2020-08-18 22:48:49,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 703 [2020-08-18 22:48:49,821 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:48:49,822 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, 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, 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 22:48:49,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 22:48:49,826 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:48:49,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:48:49,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1185073778, now seen corresponding path program 1 times [2020-08-18 22:48:49,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:48:49,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576753543] [2020-08-18 22:48:49,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:48:49,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:50,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:48:50,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:50,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 22:48:50,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:50,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 22:48:50,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:50,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 22:48:50,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:50,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-18 22:48:50,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:50,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 477 [2020-08-18 22:48:50,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:51,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 586 proven. 140 refuted. 0 times theorem prover too weak. 642 trivial. 0 not checked. [2020-08-18 22:48:51,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1576753543] [2020-08-18 22:48:51,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:48:51,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 22:48:51,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908589638] [2020-08-18 22:48:51,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 22:48:51,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:48:51,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 22:48:51,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-18 22:48:51,467 INFO L87 Difference]: Start difference. First operand 3178 states and 3483 transitions. Second operand 10 states. [2020-08-18 22:48:53,143 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2020-08-18 22:48:54,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:48:54,890 INFO L93 Difference]: Finished difference Result 6540 states and 7198 transitions. [2020-08-18 22:48:54,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 22:48:54,894 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 702 [2020-08-18 22:48:54,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:48:54,909 INFO L225 Difference]: With dead ends: 6540 [2020-08-18 22:48:54,909 INFO L226 Difference]: Without dead ends: 3552 [2020-08-18 22:48:54,916 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 22:48:54,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3552 states. [2020-08-18 22:48:54,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3552 to 3548. [2020-08-18 22:48:54,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3548 states. [2020-08-18 22:48:54,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3548 states to 3548 states and 3868 transitions. [2020-08-18 22:48:54,992 INFO L78 Accepts]: Start accepts. Automaton has 3548 states and 3868 transitions. Word has length 702 [2020-08-18 22:48:54,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:48:54,993 INFO L479 AbstractCegarLoop]: Abstraction has 3548 states and 3868 transitions. [2020-08-18 22:48:54,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 22:48:54,993 INFO L276 IsEmpty]: Start isEmpty. Operand 3548 states and 3868 transitions. [2020-08-18 22:48:55,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 729 [2020-08-18 22:48:55,004 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:48:55,004 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, 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, 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 22:48:55,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 22:48:55,005 INFO L427 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:48:55,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:48:55,005 INFO L82 PathProgramCache]: Analyzing trace with hash 326490438, now seen corresponding path program 1 times [2020-08-18 22:48:55,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:48:55,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [329522053] [2020-08-18 22:48:55,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:48:55,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:55,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:48:55,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:55,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 22:48:55,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:55,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 22:48:55,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:55,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 22:48:55,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:55,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-18 22:48:55,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:55,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-08-18 22:48:55,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:56,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1394 backedges. 733 proven. 2 refuted. 0 times theorem prover too weak. 659 trivial. 0 not checked. [2020-08-18 22:48:56,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [329522053] [2020-08-18 22:48:56,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:48:56,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 22:48:56,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081688226] [2020-08-18 22:48:56,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 22:48:56,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:48:56,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 22:48:56,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 22:48:56,161 INFO L87 Difference]: Start difference. First operand 3548 states and 3868 transitions. Second operand 7 states. [2020-08-18 22:48:57,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:48:57,648 INFO L93 Difference]: Finished difference Result 8032 states and 8888 transitions. [2020-08-18 22:48:57,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 22:48:57,649 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 728 [2020-08-18 22:48:57,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:48:57,680 INFO L225 Difference]: With dead ends: 8032 [2020-08-18 22:48:57,680 INFO L226 Difference]: Without dead ends: 4674 [2020-08-18 22:48:57,689 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 22:48:57,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4674 states. [2020-08-18 22:48:57,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4674 to 4292. [2020-08-18 22:48:57,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4292 states. [2020-08-18 22:48:57,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4292 states to 4292 states and 4748 transitions. [2020-08-18 22:48:57,788 INFO L78 Accepts]: Start accepts. Automaton has 4292 states and 4748 transitions. Word has length 728 [2020-08-18 22:48:57,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:48:57,790 INFO L479 AbstractCegarLoop]: Abstraction has 4292 states and 4748 transitions. [2020-08-18 22:48:57,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 22:48:57,790 INFO L276 IsEmpty]: Start isEmpty. Operand 4292 states and 4748 transitions. [2020-08-18 22:48:57,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 784 [2020-08-18 22:48:57,801 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:48:57,802 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, 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, 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 22:48:57,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 22:48:57,802 INFO L427 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:48:57,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:48:57,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1244120290, now seen corresponding path program 1 times [2020-08-18 22:48:57,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:48:57,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1272893797] [2020-08-18 22:48:57,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:48:57,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:58,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:48:58,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:58,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 22:48:58,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:58,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 22:48:58,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:58,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 22:48:58,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:58,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-18 22:48:58,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:58,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 425 [2020-08-18 22:48:58,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:58,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 558 [2020-08-18 22:48:58,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:48:58,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 291 proven. 6 refuted. 0 times theorem prover too weak. 1523 trivial. 0 not checked. [2020-08-18 22:48:58,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1272893797] [2020-08-18 22:48:58,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:48:58,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 22:48:58,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541967018] [2020-08-18 22:48:58,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:48:58,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:48:58,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:48:58,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:48:58,741 INFO L87 Difference]: Start difference. First operand 4292 states and 4748 transitions. Second operand 5 states. [2020-08-18 22:48:59,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:48:59,888 INFO L93 Difference]: Finished difference Result 4296 states and 4751 transitions. [2020-08-18 22:48:59,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 22:48:59,889 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 783 [2020-08-18 22:48:59,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:48:59,910 INFO L225 Difference]: With dead ends: 4296 [2020-08-18 22:48:59,910 INFO L226 Difference]: Without dead ends: 4294 [2020-08-18 22:48:59,913 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 22:48:59,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4294 states. [2020-08-18 22:48:59,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4294 to 4292. [2020-08-18 22:49:00,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4292 states. [2020-08-18 22:49:00,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4292 states to 4292 states and 4747 transitions. [2020-08-18 22:49:00,009 INFO L78 Accepts]: Start accepts. Automaton has 4292 states and 4747 transitions. Word has length 783 [2020-08-18 22:49:00,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:49:00,010 INFO L479 AbstractCegarLoop]: Abstraction has 4292 states and 4747 transitions. [2020-08-18 22:49:00,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:49:00,011 INFO L276 IsEmpty]: Start isEmpty. Operand 4292 states and 4747 transitions. [2020-08-18 22:49:00,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 829 [2020-08-18 22:49:00,028 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:49:00,029 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, 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, 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 22:49:00,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 22:49:00,030 INFO L427 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:49:00,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:49:00,031 INFO L82 PathProgramCache]: Analyzing trace with hash 277730204, now seen corresponding path program 1 times [2020-08-18 22:49:00,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:49:00,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [854140953] [2020-08-18 22:49:00,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:49:00,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:49:00,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:49:00,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:49:00,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 22:49:00,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:49:00,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 22:49:00,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:49:00,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 22:49:00,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:49:00,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-18 22:49:00,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:49:00,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-08-18 22:49:00,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:49:00,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 576 [2020-08-18 22:49:00,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:49:00,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 688 [2020-08-18 22:49:00,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:49:00,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2344 backedges. 340 proven. 7 refuted. 0 times theorem prover too weak. 1997 trivial. 0 not checked. [2020-08-18 22:49:00,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [854140953] [2020-08-18 22:49:00,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:49:00,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 22:49:00,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34834927] [2020-08-18 22:49:00,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:49:00,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:49:00,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:49:00,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:49:00,946 INFO L87 Difference]: Start difference. First operand 4292 states and 4747 transitions. Second operand 5 states. [2020-08-18 22:49:02,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:49:02,120 INFO L93 Difference]: Finished difference Result 4668 states and 5158 transitions. [2020-08-18 22:49:02,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 22:49:02,122 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 828 [2020-08-18 22:49:02,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:49:02,137 INFO L225 Difference]: With dead ends: 4668 [2020-08-18 22:49:02,137 INFO L226 Difference]: Without dead ends: 4666 [2020-08-18 22:49:02,140 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 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 22:49:02,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4666 states. [2020-08-18 22:49:02,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4666 to 4292. [2020-08-18 22:49:02,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4292 states. [2020-08-18 22:49:02,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4292 states to 4292 states and 4751 transitions. [2020-08-18 22:49:02,225 INFO L78 Accepts]: Start accepts. Automaton has 4292 states and 4751 transitions. Word has length 828 [2020-08-18 22:49:02,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:49:02,226 INFO L479 AbstractCegarLoop]: Abstraction has 4292 states and 4751 transitions. [2020-08-18 22:49:02,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:49:02,226 INFO L276 IsEmpty]: Start isEmpty. Operand 4292 states and 4751 transitions. [2020-08-18 22:49:02,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 840 [2020-08-18 22:49:02,241 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:49:02,241 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, 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, 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 22:49:02,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 22:49:02,242 INFO L427 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:49:02,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:49:02,242 INFO L82 PathProgramCache]: Analyzing trace with hash 117494447, now seen corresponding path program 1 times [2020-08-18 22:49:02,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:49:02,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580193063] [2020-08-18 22:49:02,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:49:02,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:49:02,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:49:02,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:49:02,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 22:49:02,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:49:02,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 22:49:02,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:49:02,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 22:49:02,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:49:02,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-18 22:49:02,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:49:02,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-08-18 22:49:02,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:49:02,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 576 [2020-08-18 22:49:02,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:49:02,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 688 [2020-08-18 22:49:02,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:49:03,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2399 backedges. 337 proven. 28 refuted. 0 times theorem prover too weak. 2034 trivial. 0 not checked. [2020-08-18 22:49:03,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580193063] [2020-08-18 22:49:03,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:49:03,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 22:49:03,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765393956] [2020-08-18 22:49:03,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 22:49:03,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:49:03,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 22:49:03,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-18 22:49:03,348 INFO L87 Difference]: Start difference. First operand 4292 states and 4751 transitions. Second operand 7 states. [2020-08-18 22:49:05,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:49:05,998 INFO L93 Difference]: Finished difference Result 4854 states and 5352 transitions. [2020-08-18 22:49:05,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 22:49:06,000 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 839 [2020-08-18 22:49:06,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:49:06,001 INFO L225 Difference]: With dead ends: 4854 [2020-08-18 22:49:06,001 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 22:49:06,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-08-18 22:49:06,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 22:49:06,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 22:49:06,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 22:49:06,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 22:49:06,010 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 839 [2020-08-18 22:49:06,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:49:06,010 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 22:49:06,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 22:49:06,010 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 22:49:06,010 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 22:49:06,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 22:49:06,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 22:49:06,616 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 163 [2020-08-18 22:49:06,865 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 163 [2020-08-18 22:49:07,868 WARN L193 SmtUtils]: Spent 856.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 41