/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_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 21:11:23,308 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-18 21:11:23,372 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 21:11:23,374 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 21:11:23,376 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 21:11:23,378 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 21:11:23,379 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 21:11:23,380 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 21:11:23,381 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 21:11:23,389 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 21:11:23,391 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 21:11:23,392 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 21:11:23,393 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 21:11:23,393 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 21:11:23,405 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 21:11:23,420 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 21:11:23,421 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 21:11:23,421 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 21:11:23,422 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 21:11:23,444 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 21:11:23,444 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 21:11:23,445 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 21:11:23,446 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 21:11:23,446 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 21:11:23,446 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 21:11:23,446 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 21:11:23,446 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 21:11:23,447 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 21:11:23,447 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 21:11:23,447 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 21:11:23,447 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 21:11:23,448 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 21:11:23,448 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 21:11:23,448 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 21:11:23,448 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 21:11:23,448 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 21:11:23,449 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 21:11:23,449 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 21:11:23,449 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 21:11:23,449 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 21:11:23,450 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 21:11:23,450 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 21:11:23,450 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 21:11:23,450 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 21:11:23,450 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 21:11:23,451 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 21:11:23,451 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 21:11:23,451 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 21:11:23,451 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 21:11:23,744 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 21:11:23,756 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 21:11:23,760 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 21:11:23,761 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 21:11:23,762 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 21:11:23,762 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label24.c [2020-08-18 21:11:23,830 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5d1002ce2/50685ddbf2284e05b7dd77b847e06cab/FLAG0485de0a6 [2020-08-18 21:11:24,414 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 21:11:24,415 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem14_label24.c [2020-08-18 21:11:24,430 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5d1002ce2/50685ddbf2284e05b7dd77b847e06cab/FLAG0485de0a6 [2020-08-18 21:11:24,711 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5d1002ce2/50685ddbf2284e05b7dd77b847e06cab [2020-08-18 21:11:24,722 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 21:11:24,724 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 21:11:24,725 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 21:11:24,725 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 21:11:24,729 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 21:11:24,730 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:11:24" (1/1) ... [2020-08-18 21:11:24,734 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@538d8bff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:11:24, skipping insertion in model container [2020-08-18 21:11:24,734 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:11:24" (1/1) ... [2020-08-18 21:11:24,743 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 21:11:24,806 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 21:11:25,408 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:11:25,413 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 21:11:25,597 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:11:25,623 INFO L208 MainTranslator]: Completed translation [2020-08-18 21:11:25,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:11:25 WrapperNode [2020-08-18 21:11:25,624 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 21:11:25,624 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 21:11:25,625 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 21:11:25,625 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 21:11:25,638 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:11:25" (1/1) ... [2020-08-18 21:11:25,638 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:11:25" (1/1) ... [2020-08-18 21:11:25,660 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:11:25" (1/1) ... [2020-08-18 21:11:25,661 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:11:25" (1/1) ... [2020-08-18 21:11:25,707 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:11:25" (1/1) ... [2020-08-18 21:11:25,735 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:11:25" (1/1) ... [2020-08-18 21:11:25,745 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:11:25" (1/1) ... [2020-08-18 21:11:25,757 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 21:11:25,758 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 21:11:25,758 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 21:11:25,759 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 21:11:25,759 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:11:25" (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 21:11:25,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 21:11:25,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 21:11:25,831 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-08-18 21:11:25,831 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 21:11:25,831 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-08-18 21:11:25,832 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 21:11:25,832 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 21:11:25,832 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-18 21:11:25,832 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 21:11:25,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 21:11:25,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 21:11:27,361 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 21:11:27,361 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 21:11:27,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:11:27 BoogieIcfgContainer [2020-08-18 21:11:27,376 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 21:11:27,378 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 21:11:27,378 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 21:11:27,382 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 21:11:27,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 09:11:24" (1/3) ... [2020-08-18 21:11:27,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66d55254 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:11:27, skipping insertion in model container [2020-08-18 21:11:27,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:11:25" (2/3) ... [2020-08-18 21:11:27,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66d55254 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:11:27, skipping insertion in model container [2020-08-18 21:11:27,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:11:27" (3/3) ... [2020-08-18 21:11:27,390 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label24.c [2020-08-18 21:11:27,401 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 21:11:27,414 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 21:11:27,430 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 21:11:27,470 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 21:11:27,472 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 21:11:27,472 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 21:11:27,472 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 21:11:27,472 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 21:11:27,472 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 21:11:27,473 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 21:11:27,473 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 21:11:27,509 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2020-08-18 21:11:27,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-18 21:11:27,523 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:11:27,524 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] [2020-08-18 21:11:27,525 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:11:27,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:11:27,533 INFO L82 PathProgramCache]: Analyzing trace with hash 2116109586, now seen corresponding path program 1 times [2020-08-18 21:11:27,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:11:27,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1776885602] [2020-08-18 21:11:27,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:11:27,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:27,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:11:27,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:27,987 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 21:11:27,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1776885602] [2020-08-18 21:11:27,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:11:27,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 21:11:27,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826779340] [2020-08-18 21:11:27,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:11:27,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:11:28,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:11:28,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:11:28,015 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2020-08-18 21:11:30,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:11:30,768 INFO L93 Difference]: Finished difference Result 886 states and 1613 transitions. [2020-08-18 21:11:30,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 21:11:30,773 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2020-08-18 21:11:30,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:11:30,813 INFO L225 Difference]: With dead ends: 886 [2020-08-18 21:11:30,815 INFO L226 Difference]: Without dead ends: 564 [2020-08-18 21:11:30,829 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 21:11:30,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-08-18 21:11:30,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 558. [2020-08-18 21:11:30,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2020-08-18 21:11:30,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 906 transitions. [2020-08-18 21:11:30,968 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 906 transitions. Word has length 47 [2020-08-18 21:11:30,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:11:30,970 INFO L479 AbstractCegarLoop]: Abstraction has 558 states and 906 transitions. [2020-08-18 21:11:30,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:11:30,971 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 906 transitions. [2020-08-18 21:11:30,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-18 21:11:30,990 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:11:30,991 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:11:30,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 21:11:30,991 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:11:30,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:11:30,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1939521290, now seen corresponding path program 1 times [2020-08-18 21:11:30,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:11:30,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [226527475] [2020-08-18 21:11:30,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:11:31,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:31,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:11:31,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:31,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 21:11:31,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:31,307 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:11:31,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [226527475] [2020-08-18 21:11:31,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:11:31,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 21:11:31,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521836639] [2020-08-18 21:11:31,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 21:11:31,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:11:31,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 21:11:31,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-18 21:11:31,312 INFO L87 Difference]: Start difference. First operand 558 states and 906 transitions. Second operand 8 states. [2020-08-18 21:11:33,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:11:33,282 INFO L93 Difference]: Finished difference Result 1320 states and 2174 transitions. [2020-08-18 21:11:33,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 21:11:33,283 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 121 [2020-08-18 21:11:33,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:11:33,289 INFO L225 Difference]: With dead ends: 1320 [2020-08-18 21:11:33,290 INFO L226 Difference]: Without dead ends: 768 [2020-08-18 21:11:33,292 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 21:11:33,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2020-08-18 21:11:33,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 566. [2020-08-18 21:11:33,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566 states. [2020-08-18 21:11:33,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 819 transitions. [2020-08-18 21:11:33,325 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 819 transitions. Word has length 121 [2020-08-18 21:11:33,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:11:33,326 INFO L479 AbstractCegarLoop]: Abstraction has 566 states and 819 transitions. [2020-08-18 21:11:33,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 21:11:33,326 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 819 transitions. [2020-08-18 21:11:33,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-08-18 21:11:33,329 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:11:33,330 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:11:33,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 21:11:33,330 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:11:33,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:11:33,331 INFO L82 PathProgramCache]: Analyzing trace with hash -2114473467, now seen corresponding path program 1 times [2020-08-18 21:11:33,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:11:33,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [387889219] [2020-08-18 21:11:33,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:11:33,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:33,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:11:33,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:33,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 21:11:33,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:33,614 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:11:33,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [387889219] [2020-08-18 21:11:33,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:11:33,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 21:11:33,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223275597] [2020-08-18 21:11:33,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 21:11:33,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:11:33,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 21:11:33,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-18 21:11:33,617 INFO L87 Difference]: Start difference. First operand 566 states and 819 transitions. Second operand 8 states. [2020-08-18 21:11:35,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:11:35,508 INFO L93 Difference]: Finished difference Result 1330 states and 1917 transitions. [2020-08-18 21:11:35,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 21:11:35,510 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 130 [2020-08-18 21:11:35,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:11:35,523 INFO L225 Difference]: With dead ends: 1330 [2020-08-18 21:11:35,523 INFO L226 Difference]: Without dead ends: 770 [2020-08-18 21:11:35,526 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 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 21:11:35,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2020-08-18 21:11:35,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 754. [2020-08-18 21:11:35,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 754 states. [2020-08-18 21:11:35,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1023 transitions. [2020-08-18 21:11:35,583 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1023 transitions. Word has length 130 [2020-08-18 21:11:35,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:11:35,585 INFO L479 AbstractCegarLoop]: Abstraction has 754 states and 1023 transitions. [2020-08-18 21:11:35,586 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 21:11:35,586 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1023 transitions. [2020-08-18 21:11:35,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-08-18 21:11:35,602 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:11:35,602 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, 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] [2020-08-18 21:11:35,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 21:11:35,603 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:11:35,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:11:35,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1539058259, now seen corresponding path program 1 times [2020-08-18 21:11:35,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:11:35,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [985978451] [2020-08-18 21:11:35,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:11:35,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:35,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:11:35,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:35,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 21:11:35,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:35,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-18 21:11:36,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:36,133 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 81 proven. 2 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-08-18 21:11:36,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [985978451] [2020-08-18 21:11:36,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:11:36,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 21:11:36,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309974599] [2020-08-18 21:11:36,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:11:36,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:11:36,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:11:36,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:11:36,137 INFO L87 Difference]: Start difference. First operand 754 states and 1023 transitions. Second operand 5 states. [2020-08-18 21:11:38,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:11:38,020 INFO L93 Difference]: Finished difference Result 2246 states and 3090 transitions. [2020-08-18 21:11:38,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 21:11:38,023 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 214 [2020-08-18 21:11:38,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:11:38,034 INFO L225 Difference]: With dead ends: 2246 [2020-08-18 21:11:38,034 INFO L226 Difference]: Without dead ends: 1498 [2020-08-18 21:11:38,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 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 21:11:38,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2020-08-18 21:11:38,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 1310. [2020-08-18 21:11:38,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1310 states. [2020-08-18 21:11:38,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 1681 transitions. [2020-08-18 21:11:38,091 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 1681 transitions. Word has length 214 [2020-08-18 21:11:38,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:11:38,093 INFO L479 AbstractCegarLoop]: Abstraction has 1310 states and 1681 transitions. [2020-08-18 21:11:38,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:11:38,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 1681 transitions. [2020-08-18 21:11:38,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-08-18 21:11:38,100 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:11:38,100 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:11:38,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 21:11:38,101 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:11:38,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:11:38,101 INFO L82 PathProgramCache]: Analyzing trace with hash -266552290, now seen corresponding path program 1 times [2020-08-18 21:11:38,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:11:38,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [811753293] [2020-08-18 21:11:38,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:11:38,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:38,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:11:38,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:38,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 21:11:38,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:38,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-18 21:11:38,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:38,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-08-18 21:11:38,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:38,899 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 154 proven. 191 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-18 21:11:38,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [811753293] [2020-08-18 21:11:38,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:11:38,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 21:11:38,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784205669] [2020-08-18 21:11:38,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 21:11:38,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:11:38,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 21:11:38,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-18 21:11:38,903 INFO L87 Difference]: Start difference. First operand 1310 states and 1681 transitions. Second operand 9 states. [2020-08-18 21:11:41,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:11:41,429 INFO L93 Difference]: Finished difference Result 3081 states and 3988 transitions. [2020-08-18 21:11:41,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 21:11:41,430 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 317 [2020-08-18 21:11:41,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:11:41,437 INFO L225 Difference]: With dead ends: 3081 [2020-08-18 21:11:41,438 INFO L226 Difference]: Without dead ends: 1734 [2020-08-18 21:11:41,441 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-08-18 21:11:41,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2020-08-18 21:11:41,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1690. [2020-08-18 21:11:41,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1690 states. [2020-08-18 21:11:41,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 1966 transitions. [2020-08-18 21:11:41,498 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 1966 transitions. Word has length 317 [2020-08-18 21:11:41,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:11:41,500 INFO L479 AbstractCegarLoop]: Abstraction has 1690 states and 1966 transitions. [2020-08-18 21:11:41,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 21:11:41,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 1966 transitions. [2020-08-18 21:11:41,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-08-18 21:11:41,508 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:11:41,509 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:11:41,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 21:11:41,510 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:11:41,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:11:41,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1074149043, now seen corresponding path program 1 times [2020-08-18 21:11:41,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:11:41,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2005321137] [2020-08-18 21:11:41,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:11:41,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:41,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:11:41,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:41,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 21:11:41,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:41,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-18 21:11:41,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:41,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2020-08-18 21:11:41,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:42,516 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 267 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-08-18 21:11:42,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2005321137] [2020-08-18 21:11:42,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:11:42,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 21:11:42,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557250251] [2020-08-18 21:11:42,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 21:11:42,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:11:42,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 21:11:42,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-18 21:11:42,519 INFO L87 Difference]: Start difference. First operand 1690 states and 1966 transitions. Second operand 8 states. [2020-08-18 21:11:44,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:11:44,634 INFO L93 Difference]: Finished difference Result 3607 states and 4282 transitions. [2020-08-18 21:11:44,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 21:11:44,635 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 342 [2020-08-18 21:11:44,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:11:44,646 INFO L225 Difference]: With dead ends: 3607 [2020-08-18 21:11:44,647 INFO L226 Difference]: Without dead ends: 1923 [2020-08-18 21:11:44,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-08-18 21:11:44,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2020-08-18 21:11:44,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 1882. [2020-08-18 21:11:44,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1882 states. [2020-08-18 21:11:44,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 2178 transitions. [2020-08-18 21:11:44,715 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 2178 transitions. Word has length 342 [2020-08-18 21:11:44,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:11:44,716 INFO L479 AbstractCegarLoop]: Abstraction has 1882 states and 2178 transitions. [2020-08-18 21:11:44,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 21:11:44,716 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 2178 transitions. [2020-08-18 21:11:44,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2020-08-18 21:11:44,724 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:11:44,725 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-08-18 21:11:44,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 21:11:44,725 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:11:44,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:11:44,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1716498031, now seen corresponding path program 1 times [2020-08-18 21:11:44,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:11:44,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2033771267] [2020-08-18 21:11:44,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:11:44,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:44,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:11:44,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:44,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 21:11:44,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:45,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-18 21:11:45,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:45,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2020-08-18 21:11:45,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:45,434 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 187 proven. 120 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-08-18 21:11:45,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2033771267] [2020-08-18 21:11:45,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:11:45,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 21:11:45,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060862308] [2020-08-18 21:11:45,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 21:11:45,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:11:45,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 21:11:45,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-18 21:11:45,439 INFO L87 Difference]: Start difference. First operand 1882 states and 2178 transitions. Second operand 9 states. [2020-08-18 21:11:49,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:11:49,061 INFO L93 Difference]: Finished difference Result 5807 states and 7053 transitions. [2020-08-18 21:11:49,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-18 21:11:49,068 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 360 [2020-08-18 21:11:49,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:11:49,088 INFO L225 Difference]: With dead ends: 5807 [2020-08-18 21:11:49,088 INFO L226 Difference]: Without dead ends: 3550 [2020-08-18 21:11:49,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-08-18 21:11:49,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2020-08-18 21:11:49,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 3178. [2020-08-18 21:11:49,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3178 states. [2020-08-18 21:11:49,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 3721 transitions. [2020-08-18 21:11:49,192 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 3721 transitions. Word has length 360 [2020-08-18 21:11:49,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:11:49,195 INFO L479 AbstractCegarLoop]: Abstraction has 3178 states and 3721 transitions. [2020-08-18 21:11:49,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 21:11:49,195 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 3721 transitions. [2020-08-18 21:11:49,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 610 [2020-08-18 21:11:49,216 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:11:49,217 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:11:49,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 21:11:49,218 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:11:49,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:11:49,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1968726846, now seen corresponding path program 1 times [2020-08-18 21:11:49,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:11:49,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [715525410] [2020-08-18 21:11:49,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:11:49,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:49,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:11:49,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:49,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 21:11:49,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:49,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 21:11:49,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:49,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 21:11:49,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:49,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 311 [2020-08-18 21:11:49,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:49,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 490 [2020-08-18 21:11:49,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:50,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1100 backedges. 516 proven. 79 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2020-08-18 21:11:50,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [715525410] [2020-08-18 21:11:50,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:11:50,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 21:11:50,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437105456] [2020-08-18 21:11:50,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 21:11:50,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:11:50,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 21:11:50,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 21:11:50,206 INFO L87 Difference]: Start difference. First operand 3178 states and 3721 transitions. Second operand 7 states. [2020-08-18 21:11:51,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:11:51,810 INFO L93 Difference]: Finished difference Result 6928 states and 8232 transitions. [2020-08-18 21:11:51,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 21:11:51,810 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 609 [2020-08-18 21:11:51,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:11:51,828 INFO L225 Difference]: With dead ends: 6928 [2020-08-18 21:11:51,830 INFO L226 Difference]: Without dead ends: 3938 [2020-08-18 21:11:51,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 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 21:11:51,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3938 states. [2020-08-18 21:11:51,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3938 to 3738. [2020-08-18 21:11:51,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3738 states. [2020-08-18 21:11:51,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3738 states to 3738 states and 4393 transitions. [2020-08-18 21:11:51,933 INFO L78 Accepts]: Start accepts. Automaton has 3738 states and 4393 transitions. Word has length 609 [2020-08-18 21:11:51,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:11:51,936 INFO L479 AbstractCegarLoop]: Abstraction has 3738 states and 4393 transitions. [2020-08-18 21:11:51,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 21:11:51,936 INFO L276 IsEmpty]: Start isEmpty. Operand 3738 states and 4393 transitions. [2020-08-18 21:11:51,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 643 [2020-08-18 21:11:51,950 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:11:51,950 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2020-08-18 21:11:51,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 21:11:51,951 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:11:51,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:11:51,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1522525447, now seen corresponding path program 1 times [2020-08-18 21:11:51,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:11:51,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2138349600] [2020-08-18 21:11:51,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:11:52,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:52,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:11:52,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:52,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 21:11:52,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:52,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 21:11:52,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:52,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 21:11:52,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:52,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-18 21:11:52,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:52,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 523 [2020-08-18 21:11:52,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:53,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1184 backedges. 549 proven. 79 refuted. 0 times theorem prover too weak. 556 trivial. 0 not checked. [2020-08-18 21:11:53,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2138349600] [2020-08-18 21:11:53,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:11:53,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 21:11:53,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573220644] [2020-08-18 21:11:53,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 21:11:53,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:11:53,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 21:11:53,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 21:11:53,051 INFO L87 Difference]: Start difference. First operand 3738 states and 4393 transitions. Second operand 7 states. [2020-08-18 21:11:54,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:11:54,675 INFO L93 Difference]: Finished difference Result 8034 states and 9576 transitions. [2020-08-18 21:11:54,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 21:11:54,676 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 642 [2020-08-18 21:11:54,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:11:54,697 INFO L225 Difference]: With dead ends: 8034 [2020-08-18 21:11:54,697 INFO L226 Difference]: Without dead ends: 4484 [2020-08-18 21:11:54,705 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 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 21:11:54,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4484 states. [2020-08-18 21:11:54,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4484 to 4472. [2020-08-18 21:11:54,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4472 states. [2020-08-18 21:11:54,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4472 states to 4472 states and 5249 transitions. [2020-08-18 21:11:54,823 INFO L78 Accepts]: Start accepts. Automaton has 4472 states and 5249 transitions. Word has length 642 [2020-08-18 21:11:54,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:11:54,824 INFO L479 AbstractCegarLoop]: Abstraction has 4472 states and 5249 transitions. [2020-08-18 21:11:54,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 21:11:54,824 INFO L276 IsEmpty]: Start isEmpty. Operand 4472 states and 5249 transitions. [2020-08-18 21:11:54,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 780 [2020-08-18 21:11:54,841 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:11:54,841 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, 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, 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, 3, 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] [2020-08-18 21:11:54,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 21:11:54,842 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:11:54,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:11:54,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1863793902, now seen corresponding path program 1 times [2020-08-18 21:11:54,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:11:54,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [230359022] [2020-08-18 21:11:54,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:11:54,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:55,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:11:55,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:55,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 21:11:55,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:55,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 21:11:55,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:55,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 21:11:55,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:55,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 311 [2020-08-18 21:11:55,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:55,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 441 [2020-08-18 21:11:55,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:55,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 520 [2020-08-18 21:11:55,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:55,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 660 [2020-08-18 21:11:55,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:56,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2167 backedges. 622 proven. 298 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2020-08-18 21:11:56,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [230359022] [2020-08-18 21:11:56,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:11:56,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 21:11:56,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567154424] [2020-08-18 21:11:56,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 21:11:56,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:11:56,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 21:11:56,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-18 21:11:56,036 INFO L87 Difference]: Start difference. First operand 4472 states and 5249 transitions. Second operand 7 states. [2020-08-18 21:11:57,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:11:57,896 INFO L93 Difference]: Finished difference Result 8817 states and 10383 transitions. [2020-08-18 21:11:57,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 21:11:57,897 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 779 [2020-08-18 21:11:57,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:11:57,916 INFO L225 Difference]: With dead ends: 8817 [2020-08-18 21:11:57,916 INFO L226 Difference]: Without dead ends: 4494 [2020-08-18 21:11:57,926 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-08-18 21:11:57,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4494 states. [2020-08-18 21:11:58,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4494 to 4464. [2020-08-18 21:11:58,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4464 states. [2020-08-18 21:11:58,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4464 states to 4464 states and 5013 transitions. [2020-08-18 21:11:58,034 INFO L78 Accepts]: Start accepts. Automaton has 4464 states and 5013 transitions. Word has length 779 [2020-08-18 21:11:58,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:11:58,035 INFO L479 AbstractCegarLoop]: Abstraction has 4464 states and 5013 transitions. [2020-08-18 21:11:58,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 21:11:58,035 INFO L276 IsEmpty]: Start isEmpty. Operand 4464 states and 5013 transitions. [2020-08-18 21:11:58,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 802 [2020-08-18 21:11:58,051 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:11:58,052 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 1] [2020-08-18 21:11:58,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 21:11:58,052 INFO L427 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:11:58,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:11:58,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1487204346, now seen corresponding path program 1 times [2020-08-18 21:11:58,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:11:58,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1026761117] [2020-08-18 21:11:58,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:11:58,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:58,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:11:58,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:58,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 21:11:58,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:58,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 21:11:58,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:58,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 21:11:58,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:58,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-18 21:11:58,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:58,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-08-18 21:11:58,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:58,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 682 [2020-08-18 21:11:58,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:11:59,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1799 backedges. 754 proven. 79 refuted. 0 times theorem prover too weak. 966 trivial. 0 not checked. [2020-08-18 21:11:59,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1026761117] [2020-08-18 21:11:59,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:11:59,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 21:11:59,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383698785] [2020-08-18 21:11:59,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 21:11:59,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:11:59,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 21:11:59,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 21:11:59,023 INFO L87 Difference]: Start difference. First operand 4464 states and 5013 transitions. Second operand 7 states. [2020-08-18 21:12:00,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:12:00,565 INFO L93 Difference]: Finished difference Result 9674 states and 10960 transitions. [2020-08-18 21:12:00,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 21:12:00,566 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 801 [2020-08-18 21:12:00,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:12:00,599 INFO L225 Difference]: With dead ends: 9674 [2020-08-18 21:12:00,600 INFO L226 Difference]: Without dead ends: 5398 [2020-08-18 21:12:00,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 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 21:12:00,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5398 states. [2020-08-18 21:12:00,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5398 to 5206. [2020-08-18 21:12:00,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5206 states. [2020-08-18 21:12:00,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5206 states to 5206 states and 5890 transitions. [2020-08-18 21:12:00,719 INFO L78 Accepts]: Start accepts. Automaton has 5206 states and 5890 transitions. Word has length 801 [2020-08-18 21:12:00,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:12:00,720 INFO L479 AbstractCegarLoop]: Abstraction has 5206 states and 5890 transitions. [2020-08-18 21:12:00,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 21:12:00,720 INFO L276 IsEmpty]: Start isEmpty. Operand 5206 states and 5890 transitions. [2020-08-18 21:12:00,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 806 [2020-08-18 21:12:00,737 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:12:00,738 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, 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, 5, 5, 5, 5, 5, 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, 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 21:12:00,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 21:12:00,739 INFO L427 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:12:00,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:12:00,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1595152538, now seen corresponding path program 1 times [2020-08-18 21:12:00,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:12:00,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1244718585] [2020-08-18 21:12:00,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:12:00,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:00,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:12:00,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:00,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 21:12:01,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:01,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 21:12:01,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:01,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 21:12:01,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:01,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 337 [2020-08-18 21:12:01,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:01,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 467 [2020-08-18 21:12:01,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:01,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 546 [2020-08-18 21:12:01,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:01,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 686 [2020-08-18 21:12:01,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:02,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2270 backedges. 648 proven. 298 refuted. 0 times theorem prover too weak. 1324 trivial. 0 not checked. [2020-08-18 21:12:02,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1244718585] [2020-08-18 21:12:02,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:12:02,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 21:12:02,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21698429] [2020-08-18 21:12:02,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 21:12:02,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:12:02,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 21:12:02,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-18 21:12:02,165 INFO L87 Difference]: Start difference. First operand 5206 states and 5890 transitions. Second operand 9 states. [2020-08-18 21:12:04,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:12:04,936 INFO L93 Difference]: Finished difference Result 11142 states and 12646 transitions. [2020-08-18 21:12:04,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 21:12:04,942 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 805 [2020-08-18 21:12:04,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:12:04,958 INFO L225 Difference]: With dead ends: 11142 [2020-08-18 21:12:04,959 INFO L226 Difference]: Without dead ends: 6124 [2020-08-18 21:12:04,969 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2020-08-18 21:12:04,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6124 states. [2020-08-18 21:12:05,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6124 to 5754. [2020-08-18 21:12:05,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5754 states. [2020-08-18 21:12:05,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5754 states to 5754 states and 6492 transitions. [2020-08-18 21:12:05,074 INFO L78 Accepts]: Start accepts. Automaton has 5754 states and 6492 transitions. Word has length 805 [2020-08-18 21:12:05,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:12:05,075 INFO L479 AbstractCegarLoop]: Abstraction has 5754 states and 6492 transitions. [2020-08-18 21:12:05,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 21:12:05,075 INFO L276 IsEmpty]: Start isEmpty. Operand 5754 states and 6492 transitions. [2020-08-18 21:12:05,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 849 [2020-08-18 21:12:05,093 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:12:05,094 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, 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, 5, 5, 5, 5, 5, 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, 1] [2020-08-18 21:12:05,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 21:12:05,094 INFO L427 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:12:05,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:12:05,094 INFO L82 PathProgramCache]: Analyzing trace with hash -322323375, now seen corresponding path program 1 times [2020-08-18 21:12:05,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:12:05,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1134389175] [2020-08-18 21:12:05,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:12:05,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:05,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:12:05,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:05,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 21:12:05,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:05,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 21:12:05,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:05,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 21:12:05,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:05,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-18 21:12:05,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:05,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 477 [2020-08-18 21:12:05,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:05,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 550 [2020-08-18 21:12:05,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:05,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 729 [2020-08-18 21:12:05,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:06,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 655 proven. 295 refuted. 0 times theorem prover too weak. 1301 trivial. 0 not checked. [2020-08-18 21:12:06,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1134389175] [2020-08-18 21:12:06,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:12:06,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 21:12:06,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525622885] [2020-08-18 21:12:06,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 21:12:06,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:12:06,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 21:12:06,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-18 21:12:06,919 INFO L87 Difference]: Start difference. First operand 5754 states and 6492 transitions. Second operand 10 states. [2020-08-18 21:12:10,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:12:10,524 INFO L93 Difference]: Finished difference Result 11324 states and 12797 transitions. [2020-08-18 21:12:10,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 21:12:10,525 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 848 [2020-08-18 21:12:10,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:12:10,545 INFO L225 Difference]: With dead ends: 11324 [2020-08-18 21:12:10,545 INFO L226 Difference]: Without dead ends: 5758 [2020-08-18 21:12:10,560 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2020-08-18 21:12:10,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5758 states. [2020-08-18 21:12:10,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5758 to 5756. [2020-08-18 21:12:10,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5756 states. [2020-08-18 21:12:10,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5756 states to 5756 states and 6481 transitions. [2020-08-18 21:12:10,707 INFO L78 Accepts]: Start accepts. Automaton has 5756 states and 6481 transitions. Word has length 848 [2020-08-18 21:12:10,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:12:10,713 INFO L479 AbstractCegarLoop]: Abstraction has 5756 states and 6481 transitions. [2020-08-18 21:12:10,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 21:12:10,713 INFO L276 IsEmpty]: Start isEmpty. Operand 5756 states and 6481 transitions. [2020-08-18 21:12:10,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 878 [2020-08-18 21:12:10,729 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:12:10,730 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, 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, 5, 5, 5, 5, 5, 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, 1, 1] [2020-08-18 21:12:10,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 21:12:10,730 INFO L427 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:12:10,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:12:10,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1192494146, now seen corresponding path program 1 times [2020-08-18 21:12:10,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:12:10,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [480112304] [2020-08-18 21:12:10,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:12:10,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:10,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:12:10,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:10,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 21:12:10,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:11,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 21:12:11,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:11,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 21:12:11,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:11,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-18 21:12:11,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:11,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-08-18 21:12:11,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:11,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 579 [2020-08-18 21:12:11,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:11,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 758 [2020-08-18 21:12:11,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:12,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2295 backedges. 616 proven. 160 refuted. 0 times theorem prover too weak. 1519 trivial. 0 not checked. [2020-08-18 21:12:12,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [480112304] [2020-08-18 21:12:12,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:12:12,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 21:12:12,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952558560] [2020-08-18 21:12:12,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 21:12:12,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:12:12,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 21:12:12,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-18 21:12:12,015 INFO L87 Difference]: Start difference. First operand 5756 states and 6481 transitions. Second operand 9 states. [2020-08-18 21:12:15,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:12:15,292 INFO L93 Difference]: Finished difference Result 13170 states and 14921 transitions. [2020-08-18 21:12:15,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-18 21:12:15,298 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 877 [2020-08-18 21:12:15,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:12:15,320 INFO L225 Difference]: With dead ends: 13170 [2020-08-18 21:12:15,320 INFO L226 Difference]: Without dead ends: 7602 [2020-08-18 21:12:15,331 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2020-08-18 21:12:15,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7602 states. [2020-08-18 21:12:15,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7602 to 7416. [2020-08-18 21:12:15,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7416 states. [2020-08-18 21:12:15,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7416 states to 7416 states and 8323 transitions. [2020-08-18 21:12:15,471 INFO L78 Accepts]: Start accepts. Automaton has 7416 states and 8323 transitions. Word has length 877 [2020-08-18 21:12:15,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:12:15,473 INFO L479 AbstractCegarLoop]: Abstraction has 7416 states and 8323 transitions. [2020-08-18 21:12:15,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 21:12:15,473 INFO L276 IsEmpty]: Start isEmpty. Operand 7416 states and 8323 transitions. [2020-08-18 21:12:15,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1112 [2020-08-18 21:12:15,504 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:12:15,507 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 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, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-08-18 21:12:15,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 21:12:15,508 INFO L427 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:12:15,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:12:15,509 INFO L82 PathProgramCache]: Analyzing trace with hash -488991978, now seen corresponding path program 1 times [2020-08-18 21:12:15,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:12:15,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885442125] [2020-08-18 21:12:15,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:12:15,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:15,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:12:15,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:15,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 21:12:15,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:15,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 21:12:15,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:15,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 21:12:15,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:15,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-18 21:12:15,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:15,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 425 [2020-08-18 21:12:15,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:15,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 558 [2020-08-18 21:12:15,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:16,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 631 [2020-08-18 21:12:16,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:16,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 810 [2020-08-18 21:12:16,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:16,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 992 [2020-08-18 21:12:16,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:12:17,136 INFO L134 CoverageAnalysis]: Checked inductivity of 3771 backedges. 1325 proven. 395 refuted. 0 times theorem prover too weak. 2051 trivial. 0 not checked. [2020-08-18 21:12:17,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885442125] [2020-08-18 21:12:17,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:12:17,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 21:12:17,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074022196] [2020-08-18 21:12:17,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 21:12:17,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:12:17,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 21:12:17,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-18 21:12:17,139 INFO L87 Difference]: Start difference. First operand 7416 states and 8323 transitions. Second operand 9 states.