/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=DEEPEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label01.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 21:11:18,503 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 21:11:18,506 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 21:11:18,546 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-18 21:11:18,569 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 21:11:18,572 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 21:11:18,574 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 21:11:18,576 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 21:11:18,577 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 21:11:18,578 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 21:11:18,580 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 21:11:18,586 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 21:11:18,587 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 21:11:18,588 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 21:11:18,589 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 21:11:18,589 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 21:11:18,598 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 21:11:18,606 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 21:11:18,607 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 21:11:18,609 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 21:11:18,609 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 21:11:18,651 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 21:11:18,651 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 21:11:18,653 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 21:11:18,653 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 21:11:18,654 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 21:11:18,654 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 21:11:18,654 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 21:11:18,655 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 21:11:18,655 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 21:11:18,655 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 21:11:18,656 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 21:11:18,656 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 21:11:18,656 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 21:11:18,657 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 21:11:18,657 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 21:11:18,658 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 21:11:18,658 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 21:11:18,658 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 21:11:18,658 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 21:11:18,658 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 21:11:18,658 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 21:11:18,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 21:11:18,659 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 21:11:18,659 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 21:11:18,659 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 21:11:18,659 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 21:11:18,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 21:11:18,660 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 21:11:18,660 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 21:11:18,660 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=DEEPEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=DEEPEST; [2020-08-18 21:11:18,996 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 21:11:19,009 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 21:11:19,012 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 21:11:19,013 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 21:11:19,014 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 21:11:19,015 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label01.c [2020-08-18 21:11:19,071 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7b018448c/1425da3edb3c40c9813ca067498b3a54/FLAG0fb2da44f [2020-08-18 21:11:19,614 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 21:11:19,615 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem14_label01.c [2020-08-18 21:11:19,626 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7b018448c/1425da3edb3c40c9813ca067498b3a54/FLAG0fb2da44f [2020-08-18 21:11:19,852 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7b018448c/1425da3edb3c40c9813ca067498b3a54 [2020-08-18 21:11:19,863 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 21:11:19,864 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 21:11:19,865 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 21:11:19,865 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 21:11:19,868 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 21:11:19,869 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:11:19" (1/1) ... [2020-08-18 21:11:19,872 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1806b88f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:11:19, skipping insertion in model container [2020-08-18 21:11:19,872 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:11:19" (1/1) ... [2020-08-18 21:11:19,880 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 21:11:19,936 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 21:11:20,564 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:11:20,572 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 21:11:20,719 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:11:20,735 INFO L208 MainTranslator]: Completed translation [2020-08-18 21:11:20,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:11:20 WrapperNode [2020-08-18 21:11:20,736 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 21:11:20,737 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 21:11:20,737 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 21:11:20,737 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 21:11:20,752 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:11:20" (1/1) ... [2020-08-18 21:11:20,752 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:11:20" (1/1) ... [2020-08-18 21:11:20,774 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:11:20" (1/1) ... [2020-08-18 21:11:20,774 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:11:20" (1/1) ... [2020-08-18 21:11:20,823 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:11:20" (1/1) ... [2020-08-18 21:11:20,849 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:11:20" (1/1) ... [2020-08-18 21:11:20,857 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:11:20" (1/1) ... [2020-08-18 21:11:20,868 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 21:11:20,868 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 21:11:20,868 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 21:11:20,869 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 21:11:20,870 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:11:20" (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 21:11:20,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 21:11:20,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 21:11:20,955 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-08-18 21:11:20,955 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 21:11:20,956 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-08-18 21:11:20,956 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 21:11:20,956 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 21:11:20,957 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-18 21:11:20,957 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 21:11:20,958 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 21:11:20,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 21:11:22,434 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 21:11:22,434 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 21:11:22,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:11:22 BoogieIcfgContainer [2020-08-18 21:11:22,442 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 21:11:22,443 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 21:11:22,443 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 21:11:22,447 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 21:11:22,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 09:11:19" (1/3) ... [2020-08-18 21:11:22,448 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50024e4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:11:22, skipping insertion in model container [2020-08-18 21:11:22,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:11:20" (2/3) ... [2020-08-18 21:11:22,449 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50024e4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:11:22, skipping insertion in model container [2020-08-18 21:11:22,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:11:22" (3/3) ... [2020-08-18 21:11:22,451 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label01.c [2020-08-18 21:11:22,461 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 21:11:22,471 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 21:11:22,485 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 21:11:22,510 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 21:11:22,510 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 21:11:22,511 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 21:11:22,511 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 21:11:22,511 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 21:11:22,511 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 21:11:22,512 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 21:11:22,512 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 21:11:22,535 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2020-08-18 21:11:22,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-18 21:11:22,544 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:11:22,546 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:11:22,546 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:11:22,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:11:22,552 INFO L82 PathProgramCache]: Analyzing trace with hash -184228989, now seen corresponding path program 1 times [2020-08-18 21:11:22,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:11:22,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1207276541] [2020-08-18 21:11:22,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:11:22,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:22,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:11:22,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:22,985 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 21:11:22,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1207276541] [2020-08-18 21:11:22,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:11:22,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 21:11:22,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021306972] [2020-08-18 21:11:22,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:11:23,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:11:23,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:11:23,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:11:23,024 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2020-08-18 21:11:25,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:11:25,793 INFO L93 Difference]: Finished difference Result 886 states and 1612 transitions. [2020-08-18 21:11:25,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 21:11:25,796 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 60 [2020-08-18 21:11:25,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:11:25,819 INFO L225 Difference]: With dead ends: 886 [2020-08-18 21:11:25,819 INFO L226 Difference]: Without dead ends: 564 [2020-08-18 21:11:25,829 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 21:11:25,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-08-18 21:11:25,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 560. [2020-08-18 21:11:25,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 560 states. [2020-08-18 21:11:25,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 861 transitions. [2020-08-18 21:11:25,923 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 861 transitions. Word has length 60 [2020-08-18 21:11:25,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:11:25,924 INFO L479 AbstractCegarLoop]: Abstraction has 560 states and 861 transitions. [2020-08-18 21:11:25,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:11:25,925 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 861 transitions. [2020-08-18 21:11:25,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-08-18 21:11:25,934 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:11:25,934 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:11:25,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 21:11:25,935 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:11:25,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:11:25,935 INFO L82 PathProgramCache]: Analyzing trace with hash 2117260534, now seen corresponding path program 1 times [2020-08-18 21:11:25,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:11:25,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [623503662] [2020-08-18 21:11:25,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:11:26,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:26,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:11:26,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:26,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 21:11:26,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:26,307 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:11:26,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [623503662] [2020-08-18 21:11:26,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:11:26,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 21:11:26,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440675202] [2020-08-18 21:11:26,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 21:11:26,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:11:26,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 21:11:26,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 21:11:26,312 INFO L87 Difference]: Start difference. First operand 560 states and 861 transitions. Second operand 7 states. [2020-08-18 21:11:28,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:11:28,315 INFO L93 Difference]: Finished difference Result 1518 states and 2374 transitions. [2020-08-18 21:11:28,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 21:11:28,315 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 154 [2020-08-18 21:11:28,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:11:28,327 INFO L225 Difference]: With dead ends: 1518 [2020-08-18 21:11:28,327 INFO L226 Difference]: Without dead ends: 964 [2020-08-18 21:11:28,330 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 21:11:28,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2020-08-18 21:11:28,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 944. [2020-08-18 21:11:28,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 944 states. [2020-08-18 21:11:28,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1336 transitions. [2020-08-18 21:11:28,413 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1336 transitions. Word has length 154 [2020-08-18 21:11:28,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:11:28,416 INFO L479 AbstractCegarLoop]: Abstraction has 944 states and 1336 transitions. [2020-08-18 21:11:28,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 21:11:28,416 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1336 transitions. [2020-08-18 21:11:28,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-08-18 21:11:28,430 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:11:28,432 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:11:28,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 21:11:28,432 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:11:28,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:11:28,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1698067270, now seen corresponding path program 1 times [2020-08-18 21:11:28,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:11:28,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1979739606] [2020-08-18 21:11:28,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:11:28,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:28,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:11:28,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:28,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 21:11:28,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:28,914 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:11:28,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1979739606] [2020-08-18 21:11:28,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:11:28,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 21:11:28,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684111051] [2020-08-18 21:11:28,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 21:11:28,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:11:28,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 21:11:28,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-18 21:11:28,917 INFO L87 Difference]: Start difference. First operand 944 states and 1336 transitions. Second operand 8 states. [2020-08-18 21:11:30,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:11:30,865 INFO L93 Difference]: Finished difference Result 2490 states and 3798 transitions. [2020-08-18 21:11:30,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 21:11:30,867 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 200 [2020-08-18 21:11:30,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:11:30,885 INFO L225 Difference]: With dead ends: 2490 [2020-08-18 21:11:30,885 INFO L226 Difference]: Without dead ends: 1552 [2020-08-18 21:11:30,888 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 21:11:30,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1552 states. [2020-08-18 21:11:30,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1552 to 1518. [2020-08-18 21:11:30,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1518 states. [2020-08-18 21:11:30,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 2119 transitions. [2020-08-18 21:11:30,988 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 2119 transitions. Word has length 200 [2020-08-18 21:11:30,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:11:30,989 INFO L479 AbstractCegarLoop]: Abstraction has 1518 states and 2119 transitions. [2020-08-18 21:11:30,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 21:11:30,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 2119 transitions. [2020-08-18 21:11:30,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-08-18 21:11:30,995 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:11:30,995 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:11:30,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 21:11:30,996 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:11:30,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:11:30,996 INFO L82 PathProgramCache]: Analyzing trace with hash 328652488, now seen corresponding path program 1 times [2020-08-18 21:11:30,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:11:30,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078536749] [2020-08-18 21:11:30,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:11:31,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:31,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:11:31,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:31,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 21:11:31,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:31,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-18 21:11:31,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:31,331 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 106 proven. 71 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 21:11:31,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078536749] [2020-08-18 21:11:31,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:11:31,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 21:11:31,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285732496] [2020-08-18 21:11:31,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 21:11:31,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:11:31,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 21:11:31,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-18 21:11:31,339 INFO L87 Difference]: Start difference. First operand 1518 states and 2119 transitions. Second operand 8 states. [2020-08-18 21:11:33,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:11:33,032 INFO L93 Difference]: Finished difference Result 3412 states and 4693 transitions. [2020-08-18 21:11:33,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 21:11:33,033 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 219 [2020-08-18 21:11:33,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:11:33,043 INFO L225 Difference]: With dead ends: 3412 [2020-08-18 21:11:33,043 INFO L226 Difference]: Without dead ends: 1900 [2020-08-18 21:11:33,047 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 21:11:33,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1900 states. [2020-08-18 21:11:33,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1900 to 1890. [2020-08-18 21:11:33,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1890 states. [2020-08-18 21:11:33,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 2517 transitions. [2020-08-18 21:11:33,102 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 2517 transitions. Word has length 219 [2020-08-18 21:11:33,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:11:33,103 INFO L479 AbstractCegarLoop]: Abstraction has 1890 states and 2517 transitions. [2020-08-18 21:11:33,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 21:11:33,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 2517 transitions. [2020-08-18 21:11:33,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2020-08-18 21:11:33,109 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:11:33,110 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:11:33,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 21:11:33,110 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:11:33,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:11:33,111 INFO L82 PathProgramCache]: Analyzing trace with hash -56962879, now seen corresponding path program 1 times [2020-08-18 21:11:33,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:11:33,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [60965799] [2020-08-18 21:11:33,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:11:33,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:33,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:11:33,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:33,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 21:11:33,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:33,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-18 21:11:33,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:33,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2020-08-18 21:11:33,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:33,778 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 193 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-18 21:11:33,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [60965799] [2020-08-18 21:11:33,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:11:33,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 21:11:33,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445280166] [2020-08-18 21:11:33,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 21:11:33,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:11:33,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 21:11:33,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-18 21:11:33,782 INFO L87 Difference]: Start difference. First operand 1890 states and 2517 transitions. Second operand 9 states. [2020-08-18 21:11:36,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:11:36,489 INFO L93 Difference]: Finished difference Result 3677 states and 4968 transitions. [2020-08-18 21:11:36,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 21:11:36,490 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 303 [2020-08-18 21:11:36,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:11:36,500 INFO L225 Difference]: With dead ends: 3677 [2020-08-18 21:11:36,500 INFO L226 Difference]: Without dead ends: 1930 [2020-08-18 21:11:36,505 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 21:11:36,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-18 21:11:36,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1882. [2020-08-18 21:11:36,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1882 states. [2020-08-18 21:11:36,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 2280 transitions. [2020-08-18 21:11:36,567 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 2280 transitions. Word has length 303 [2020-08-18 21:11:36,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:11:36,569 INFO L479 AbstractCegarLoop]: Abstraction has 1882 states and 2280 transitions. [2020-08-18 21:11:36,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 21:11:36,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 2280 transitions. [2020-08-18 21:11:36,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2020-08-18 21:11:36,579 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:11:36,579 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:11:36,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 21:11:36,580 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:11:36,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:11:36,580 INFO L82 PathProgramCache]: Analyzing trace with hash -48667167, now seen corresponding path program 1 times [2020-08-18 21:11:36,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:11:36,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2024588458] [2020-08-18 21:11:36,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:11:36,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:36,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:11:36,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:36,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 21:11:36,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:36,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 21:11:36,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:36,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 21:11:36,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:36,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 310 [2020-08-18 21:11:36,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:37,311 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 438 proven. 11 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2020-08-18 21:11:37,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2024588458] [2020-08-18 21:11:37,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:11:37,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 21:11:37,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021613972] [2020-08-18 21:11:37,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 21:11:37,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:11:37,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 21:11:37,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-18 21:11:37,315 INFO L87 Difference]: Start difference. First operand 1882 states and 2280 transitions. Second operand 9 states. [2020-08-18 21:11:41,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:11:41,860 INFO L93 Difference]: Finished difference Result 5238 states and 6410 transitions. [2020-08-18 21:11:41,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-18 21:11:41,868 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 438 [2020-08-18 21:11:41,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:11:41,885 INFO L225 Difference]: With dead ends: 5238 [2020-08-18 21:11:41,885 INFO L226 Difference]: Without dead ends: 3356 [2020-08-18 21:11:41,890 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 21:11:41,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3356 states. [2020-08-18 21:11:41,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3356 to 2438. [2020-08-18 21:11:41,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2438 states. [2020-08-18 21:11:41,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2438 states to 2438 states and 2779 transitions. [2020-08-18 21:11:41,965 INFO L78 Accepts]: Start accepts. Automaton has 2438 states and 2779 transitions. Word has length 438 [2020-08-18 21:11:41,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:11:41,966 INFO L479 AbstractCegarLoop]: Abstraction has 2438 states and 2779 transitions. [2020-08-18 21:11:41,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 21:11:41,966 INFO L276 IsEmpty]: Start isEmpty. Operand 2438 states and 2779 transitions. [2020-08-18 21:11:41,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 559 [2020-08-18 21:11:41,981 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:11:41,981 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:11:41,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 21:11:41,982 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:11:41,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:11:41,982 INFO L82 PathProgramCache]: Analyzing trace with hash -347726080, now seen corresponding path program 1 times [2020-08-18 21:11:41,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:11:41,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1940814381] [2020-08-18 21:11:41,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:11:42,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:42,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:11:42,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:42,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 21:11:42,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:42,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 21:11:42,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:42,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 21:11:42,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:42,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 300 [2020-08-18 21:11:42,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:42,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 412 [2020-08-18 21:11:42,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:43,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1167 backedges. 668 proven. 209 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2020-08-18 21:11:43,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1940814381] [2020-08-18 21:11:43,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:11:43,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 21:11:43,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247577673] [2020-08-18 21:11:43,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 21:11:43,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:11:43,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 21:11:43,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-18 21:11:43,137 INFO L87 Difference]: Start difference. First operand 2438 states and 2779 transitions. Second operand 10 states. [2020-08-18 21:11:46,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:11:46,107 INFO L93 Difference]: Finished difference Result 5701 states and 6650 transitions. [2020-08-18 21:11:46,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 21:11:46,108 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 558 [2020-08-18 21:11:46,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:11:46,123 INFO L225 Difference]: With dead ends: 5701 [2020-08-18 21:11:46,123 INFO L226 Difference]: Without dead ends: 3400 [2020-08-18 21:11:46,129 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 21:11:46,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3400 states. [2020-08-18 21:11:46,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3400 to 3174. [2020-08-18 21:11:46,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3174 states. [2020-08-18 21:11:46,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3174 states to 3174 states and 3495 transitions. [2020-08-18 21:11:46,199 INFO L78 Accepts]: Start accepts. Automaton has 3174 states and 3495 transitions. Word has length 558 [2020-08-18 21:11:46,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:11:46,199 INFO L479 AbstractCegarLoop]: Abstraction has 3174 states and 3495 transitions. [2020-08-18 21:11:46,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 21:11:46,200 INFO L276 IsEmpty]: Start isEmpty. Operand 3174 states and 3495 transitions. [2020-08-18 21:11:46,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 592 [2020-08-18 21:11:46,207 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:11:46,207 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:11:46,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 21:11:46,208 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:11:46,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:11:46,208 INFO L82 PathProgramCache]: Analyzing trace with hash -229639858, now seen corresponding path program 1 times [2020-08-18 21:11:46,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:11:46,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1013678956] [2020-08-18 21:11:46,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:11:46,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:46,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:11:46,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:46,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 21:11:46,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:46,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 21:11:46,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:46,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 21:11:46,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:46,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 360 [2020-08-18 21:11:46,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:47,623 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 439 proven. 136 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2020-08-18 21:11:47,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1013678956] [2020-08-18 21:11:47,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:11:47,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 21:11:47,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406012123] [2020-08-18 21:11:47,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 21:11:47,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:11:47,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 21:11:47,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-18 21:11:47,626 INFO L87 Difference]: Start difference. First operand 3174 states and 3495 transitions. Second operand 10 states. [2020-08-18 21:11:50,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:11:50,633 INFO L93 Difference]: Finished difference Result 5994 states and 6643 transitions. [2020-08-18 21:11:50,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 21:11:50,634 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 591 [2020-08-18 21:11:50,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:11:50,647 INFO L225 Difference]: With dead ends: 5994 [2020-08-18 21:11:50,647 INFO L226 Difference]: Without dead ends: 3192 [2020-08-18 21:11:50,654 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 21:11:50,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3192 states. [2020-08-18 21:11:50,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3192 to 3178. [2020-08-18 21:11:50,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3178 states. [2020-08-18 21:11:50,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 3486 transitions. [2020-08-18 21:11:50,731 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 3486 transitions. Word has length 591 [2020-08-18 21:11:50,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:11:50,732 INFO L479 AbstractCegarLoop]: Abstraction has 3178 states and 3486 transitions. [2020-08-18 21:11:50,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 21:11:50,732 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 3486 transitions. [2020-08-18 21:11:50,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 702 [2020-08-18 21:11:50,740 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:11:50,741 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:11:50,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 21:11:50,743 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:11:50,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:11:50,745 INFO L82 PathProgramCache]: Analyzing trace with hash -278736799, now seen corresponding path program 2 times [2020-08-18 21:11:50,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:11:50,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [14712675] [2020-08-18 21:11:50,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:11:50,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:51,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:11:51,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:51,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 21:11:51,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:51,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 21:11:51,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:51,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 21:11:51,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:51,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 337 [2020-08-18 21:11:51,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:51,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 470 [2020-08-18 21:11:51,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:52,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1384 backedges. 609 proven. 140 refuted. 0 times theorem prover too weak. 635 trivial. 0 not checked. [2020-08-18 21:11:52,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [14712675] [2020-08-18 21:11:52,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:11:52,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 21:11:52,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714628297] [2020-08-18 21:11:52,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 21:11:52,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:11:52,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 21:11:52,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-18 21:11:52,170 INFO L87 Difference]: Start difference. First operand 3178 states and 3486 transitions. Second operand 9 states. [2020-08-18 21:11:54,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:11:54,657 INFO L93 Difference]: Finished difference Result 6354 states and 6982 transitions. [2020-08-18 21:11:54,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 21:11:54,658 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 701 [2020-08-18 21:11:54,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:11:54,669 INFO L225 Difference]: With dead ends: 6354 [2020-08-18 21:11:54,669 INFO L226 Difference]: Without dead ends: 3364 [2020-08-18 21:11:54,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-08-18 21:11:54,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3364 states. [2020-08-18 21:11:54,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3364 to 3178. [2020-08-18 21:11:54,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3178 states. [2020-08-18 21:11:54,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 3484 transitions. [2020-08-18 21:11:54,752 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 3484 transitions. Word has length 701 [2020-08-18 21:11:54,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:11:54,753 INFO L479 AbstractCegarLoop]: Abstraction has 3178 states and 3484 transitions. [2020-08-18 21:11:54,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 21:11:54,753 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 3484 transitions. [2020-08-18 21:11:54,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 709 [2020-08-18 21:11:54,761 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:11:54,762 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:11:54,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 21:11:54,763 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:11:54,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:11:54,763 INFO L82 PathProgramCache]: Analyzing trace with hash -638310518, now seen corresponding path program 1 times [2020-08-18 21:11:54,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:11:54,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [325673923] [2020-08-18 21:11:54,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:11:54,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:54,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:11:54,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:54,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 21:11:54,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:55,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 21:11:55,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:55,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 21:11:55,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:55,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-18 21:11:55,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:55,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 477 [2020-08-18 21:11:55,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:56,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1398 backedges. 616 proven. 140 refuted. 0 times theorem prover too weak. 642 trivial. 0 not checked. [2020-08-18 21:11:56,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [325673923] [2020-08-18 21:11:56,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:11:56,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 21:11:56,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255898399] [2020-08-18 21:11:56,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 21:11:56,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:11:56,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 21:11:56,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-18 21:11:56,131 INFO L87 Difference]: Start difference. First operand 3178 states and 3484 transitions. Second operand 10 states. [2020-08-18 21:11:57,950 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2020-08-18 21:11:59,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:11:59,798 INFO L93 Difference]: Finished difference Result 6540 states and 7200 transitions. [2020-08-18 21:11:59,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 21:11:59,801 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 708 [2020-08-18 21:11:59,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:11:59,815 INFO L225 Difference]: With dead ends: 6540 [2020-08-18 21:11:59,815 INFO L226 Difference]: Without dead ends: 3552 [2020-08-18 21:11:59,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2020-08-18 21:11:59,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3552 states. [2020-08-18 21:11:59,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3552 to 3548. [2020-08-18 21:11:59,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3548 states. [2020-08-18 21:11:59,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3548 states to 3548 states and 3869 transitions. [2020-08-18 21:11:59,892 INFO L78 Accepts]: Start accepts. Automaton has 3548 states and 3869 transitions. Word has length 708 [2020-08-18 21:11:59,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:11:59,893 INFO L479 AbstractCegarLoop]: Abstraction has 3548 states and 3869 transitions. [2020-08-18 21:11:59,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 21:11:59,893 INFO L276 IsEmpty]: Start isEmpty. Operand 3548 states and 3869 transitions. [2020-08-18 21:11:59,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 735 [2020-08-18 21:11:59,902 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:11:59,903 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:11:59,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 21:11:59,903 INFO L427 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:11:59,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:11:59,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1537329314, now seen corresponding path program 1 times [2020-08-18 21:11:59,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:11:59,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1566770550] [2020-08-18 21:11:59,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:12:00,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:00,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:12:00,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:00,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 21:12:00,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:00,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 21:12:00,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:00,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 21:12:00,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:00,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-18 21:12:00,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:00,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-08-18 21:12:00,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:00,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1424 backedges. 763 proven. 2 refuted. 0 times theorem prover too weak. 659 trivial. 0 not checked. [2020-08-18 21:12:00,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1566770550] [2020-08-18 21:12:00,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:12:00,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 21:12:00,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801457780] [2020-08-18 21:12:00,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 21:12:00,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:12:00,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 21:12:00,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 21:12:00,888 INFO L87 Difference]: Start difference. First operand 3548 states and 3869 transitions. Second operand 7 states. [2020-08-18 21:12:02,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:12:02,356 INFO L93 Difference]: Finished difference Result 8032 states and 8890 transitions. [2020-08-18 21:12:02,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 21:12:02,361 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 734 [2020-08-18 21:12:02,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:12:02,387 INFO L225 Difference]: With dead ends: 8032 [2020-08-18 21:12:02,387 INFO L226 Difference]: Without dead ends: 4674 [2020-08-18 21:12:02,395 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 21:12:02,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4674 states. [2020-08-18 21:12:02,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4674 to 4292. [2020-08-18 21:12:02,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4292 states. [2020-08-18 21:12:02,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4292 states to 4292 states and 4750 transitions. [2020-08-18 21:12:02,484 INFO L78 Accepts]: Start accepts. Automaton has 4292 states and 4750 transitions. Word has length 734 [2020-08-18 21:12:02,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:12:02,485 INFO L479 AbstractCegarLoop]: Abstraction has 4292 states and 4750 transitions. [2020-08-18 21:12:02,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 21:12:02,485 INFO L276 IsEmpty]: Start isEmpty. Operand 4292 states and 4750 transitions. [2020-08-18 21:12:02,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 790 [2020-08-18 21:12:02,496 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:12:02,497 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:12:02,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 21:12:02,497 INFO L427 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:12:02,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:12:02,498 INFO L82 PathProgramCache]: Analyzing trace with hash -583849898, now seen corresponding path program 1 times [2020-08-18 21:12:02,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:12:02,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1714861259] [2020-08-18 21:12:02,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:12:02,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:02,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:12:02,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:02,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 21:12:02,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:02,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 21:12:02,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:02,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 21:12:02,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:02,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-18 21:12:02,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:02,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 425 [2020-08-18 21:12:02,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:02,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 558 [2020-08-18 21:12:02,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:03,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1856 backedges. 327 proven. 6 refuted. 0 times theorem prover too weak. 1523 trivial. 0 not checked. [2020-08-18 21:12:03,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1714861259] [2020-08-18 21:12:03,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:12:03,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 21:12:03,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029549101] [2020-08-18 21:12:03,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:12:03,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:12:03,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:12:03,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:12:03,503 INFO L87 Difference]: Start difference. First operand 4292 states and 4750 transitions. Second operand 5 states. [2020-08-18 21:12:04,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:12:04,716 INFO L93 Difference]: Finished difference Result 4296 states and 4753 transitions. [2020-08-18 21:12:04,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 21:12:04,721 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 789 [2020-08-18 21:12:04,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:12:04,733 INFO L225 Difference]: With dead ends: 4296 [2020-08-18 21:12:04,734 INFO L226 Difference]: Without dead ends: 4294 [2020-08-18 21:12:04,736 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 21:12:04,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4294 states. [2020-08-18 21:12:04,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4294 to 4292. [2020-08-18 21:12:04,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4292 states. [2020-08-18 21:12:04,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4292 states to 4292 states and 4747 transitions. [2020-08-18 21:12:04,811 INFO L78 Accepts]: Start accepts. Automaton has 4292 states and 4747 transitions. Word has length 789 [2020-08-18 21:12:04,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:12:04,812 INFO L479 AbstractCegarLoop]: Abstraction has 4292 states and 4747 transitions. [2020-08-18 21:12:04,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:12:04,812 INFO L276 IsEmpty]: Start isEmpty. Operand 4292 states and 4747 transitions. [2020-08-18 21:12:04,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 835 [2020-08-18 21:12:04,825 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:12:04,826 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:12:04,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 21:12:04,826 INFO L427 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:12:04,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:12:04,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1874704500, now seen corresponding path program 1 times [2020-08-18 21:12:04,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:12:04,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [892274572] [2020-08-18 21:12:04,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:12:04,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:05,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:12:05,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:05,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 21:12:05,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:05,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 21:12:05,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:05,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 21:12:05,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:05,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-18 21:12:05,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:05,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-08-18 21:12:05,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:05,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 576 [2020-08-18 21:12:05,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:05,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 688 [2020-08-18 21:12:05,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:05,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2386 backedges. 382 proven. 7 refuted. 0 times theorem prover too weak. 1997 trivial. 0 not checked. [2020-08-18 21:12:05,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [892274572] [2020-08-18 21:12:05,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:12:05,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 21:12:05,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568012818] [2020-08-18 21:12:05,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:12:05,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:12:05,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:12:05,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:12:05,695 INFO L87 Difference]: Start difference. First operand 4292 states and 4747 transitions. Second operand 5 states. [2020-08-18 21:12:06,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:12:06,967 INFO L93 Difference]: Finished difference Result 9128 states and 10168 transitions. [2020-08-18 21:12:06,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 21:12:06,968 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 834 [2020-08-18 21:12:06,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:12:06,981 INFO L225 Difference]: With dead ends: 9128 [2020-08-18 21:12:06,981 INFO L226 Difference]: Without dead ends: 5026 [2020-08-18 21:12:06,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-08-18 21:12:06,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5026 states. [2020-08-18 21:12:07,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5026 to 3918. [2020-08-18 21:12:07,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3918 states. [2020-08-18 21:12:07,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3918 states to 3918 states and 4287 transitions. [2020-08-18 21:12:07,066 INFO L78 Accepts]: Start accepts. Automaton has 3918 states and 4287 transitions. Word has length 834 [2020-08-18 21:12:07,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:12:07,067 INFO L479 AbstractCegarLoop]: Abstraction has 3918 states and 4287 transitions. [2020-08-18 21:12:07,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:12:07,067 INFO L276 IsEmpty]: Start isEmpty. Operand 3918 states and 4287 transitions. [2020-08-18 21:12:07,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 846 [2020-08-18 21:12:07,080 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:12:07,081 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:12:07,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 21:12:07,081 INFO L427 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:12:07,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:12:07,082 INFO L82 PathProgramCache]: Analyzing trace with hash -177347705, now seen corresponding path program 1 times [2020-08-18 21:12:07,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:12:07,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [569778425] [2020-08-18 21:12:07,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:12:07,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:07,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:12:07,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:07,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 21:12:07,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:07,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 21:12:07,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:07,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 21:12:07,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:07,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-18 21:12:07,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:07,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-08-18 21:12:07,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:07,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 576 [2020-08-18 21:12:07,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:07,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 688 [2020-08-18 21:12:07,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:07,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2441 backedges. 379 proven. 28 refuted. 0 times theorem prover too weak. 2034 trivial. 0 not checked. [2020-08-18 21:12:07,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [569778425] [2020-08-18 21:12:07,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:12:07,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 21:12:07,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663680102] [2020-08-18 21:12:07,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 21:12:07,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:12:07,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 21:12:07,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-18 21:12:07,999 INFO L87 Difference]: Start difference. First operand 3918 states and 4287 transitions. Second operand 8 states. [2020-08-18 21:12:11,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:12:11,061 INFO L93 Difference]: Finished difference Result 5032 states and 5532 transitions. [2020-08-18 21:12:11,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 21:12:11,066 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 845 [2020-08-18 21:12:11,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:12:11,067 INFO L225 Difference]: With dead ends: 5032 [2020-08-18 21:12:11,067 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 21:12:11,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-08-18 21:12:11,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 21:12:11,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 21:12:11,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 21:12:11,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 21:12:11,077 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 845 [2020-08-18 21:12:11,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:12:11,078 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 21:12:11,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 21:12:11,078 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 21:12:11,078 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 21:12:11,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 21:12:11,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 21:12:11,641 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 177 [2020-08-18 21:12:11,841 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 177 [2020-08-18 21:12:13,367 WARN L193 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 250 DAG size of output: 61 [2020-08-18 21:12:14,396 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 183 DAG size of output: 55