/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=BIGGEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label36.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 17:58:09,081 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-18 17:58:09,149 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 17:58:09,150 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 17:58:09,151 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 17:58:09,152 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 17:58:09,153 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 17:58:09,153 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 17:58:09,155 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 17:58:09,157 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 17:58:09,158 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 17:58:09,159 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 17:58:09,160 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 17:58:09,161 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 17:58:09,163 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 17:58:09,171 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 17:58:09,172 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 17:58:09,172 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 17:58:09,173 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 17:58:09,199 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 17:58:09,199 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 17:58:09,200 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 17:58:09,200 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 17:58:09,201 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 17:58:09,201 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 17:58:09,201 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 17:58:09,201 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 17:58:09,201 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 17:58:09,202 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 17:58:09,202 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 17:58:09,202 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 17:58:09,202 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 17:58:09,202 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 17:58:09,202 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 17:58:09,203 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 17:58:09,203 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 17:58:09,203 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 17:58:09,203 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 17:58:09,203 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 17:58:09,204 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 17:58:09,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 17:58:09,204 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 17:58:09,204 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 17:58:09,204 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 17:58:09,205 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 17:58:09,205 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 17:58:09,205 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 17:58:09,205 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 17:58:09,205 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=BIGGEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; [2020-08-18 17:58:09,540 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 17:58:09,554 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 17:58:09,557 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 17:58:09,559 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 17:58:09,560 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 17:58:09,560 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label36.c [2020-08-18 17:58:09,625 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eb50ea715/532f8383c72f4c1eb1fa51181ce6ada0/FLAG03fefa6e7 [2020-08-18 17:58:10,244 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 17:58:10,246 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem14_label36.c [2020-08-18 17:58:10,261 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eb50ea715/532f8383c72f4c1eb1fa51181ce6ada0/FLAG03fefa6e7 [2020-08-18 17:58:10,482 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eb50ea715/532f8383c72f4c1eb1fa51181ce6ada0 [2020-08-18 17:58:10,490 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 17:58:10,492 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 17:58:10,493 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 17:58:10,493 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 17:58:10,497 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 17:58:10,498 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:58:10" (1/1) ... [2020-08-18 17:58:10,501 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c78ef90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:58:10, skipping insertion in model container [2020-08-18 17:58:10,501 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:58:10" (1/1) ... [2020-08-18 17:58:10,509 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 17:58:10,580 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 17:58:11,311 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:58:11,317 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 17:58:11,534 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:58:11,556 INFO L208 MainTranslator]: Completed translation [2020-08-18 17:58:11,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:58:11 WrapperNode [2020-08-18 17:58:11,558 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 17:58:11,558 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 17:58:11,559 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 17:58:11,559 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 17:58:11,573 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:58:11" (1/1) ... [2020-08-18 17:58:11,575 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:58:11" (1/1) ... [2020-08-18 17:58:11,605 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:58:11" (1/1) ... [2020-08-18 17:58:11,605 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:58:11" (1/1) ... [2020-08-18 17:58:11,646 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:58:11" (1/1) ... [2020-08-18 17:58:11,674 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:58:11" (1/1) ... [2020-08-18 17:58:11,685 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:58:11" (1/1) ... [2020-08-18 17:58:11,693 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 17:58:11,694 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 17:58:11,694 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 17:58:11,694 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 17:58:11,695 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:58:11" (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 17:58:11,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 17:58:11,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 17:58:11,766 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-08-18 17:58:11,766 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 17:58:11,766 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-08-18 17:58:11,767 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 17:58:11,767 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 17:58:11,767 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-18 17:58:11,767 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 17:58:11,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 17:58:11,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 17:58:13,188 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 17:58:13,188 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 17:58:13,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:58:13 BoogieIcfgContainer [2020-08-18 17:58:13,195 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 17:58:13,196 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 17:58:13,196 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 17:58:13,200 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 17:58:13,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 05:58:10" (1/3) ... [2020-08-18 17:58:13,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44a138eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:58:13, skipping insertion in model container [2020-08-18 17:58:13,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:58:11" (2/3) ... [2020-08-18 17:58:13,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44a138eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:58:13, skipping insertion in model container [2020-08-18 17:58:13,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:58:13" (3/3) ... [2020-08-18 17:58:13,204 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label36.c [2020-08-18 17:58:13,215 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 17:58:13,223 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 17:58:13,238 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 17:58:13,266 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 17:58:13,266 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 17:58:13,267 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 17:58:13,267 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 17:58:13,267 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 17:58:13,267 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 17:58:13,267 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 17:58:13,267 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 17:58:13,293 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2020-08-18 17:58:13,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-18 17:58:13,303 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:58:13,304 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:58:13,305 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:58:13,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:58:13,312 INFO L82 PathProgramCache]: Analyzing trace with hash 406410443, now seen corresponding path program 1 times [2020-08-18 17:58:13,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:58:13,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1525479667] [2020-08-18 17:58:13,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:58:13,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:13,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:58:13,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:13,723 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 17:58:13,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1525479667] [2020-08-18 17:58:13,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:58:13,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 17:58:13,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980763169] [2020-08-18 17:58:13,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:58:13,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:58:13,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:58:13,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:58:13,756 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2020-08-18 17:58:16,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:58:16,526 INFO L93 Difference]: Finished difference Result 886 states and 1612 transitions. [2020-08-18 17:58:16,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 17:58:16,528 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-08-18 17:58:16,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:58:16,551 INFO L225 Difference]: With dead ends: 886 [2020-08-18 17:58:16,551 INFO L226 Difference]: Without dead ends: 564 [2020-08-18 17:58:16,561 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 17:58:16,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-08-18 17:58:16,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 560. [2020-08-18 17:58:16,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 560 states. [2020-08-18 17:58:16,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 861 transitions. [2020-08-18 17:58:16,689 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 861 transitions. Word has length 54 [2020-08-18 17:58:16,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:58:16,691 INFO L479 AbstractCegarLoop]: Abstraction has 560 states and 861 transitions. [2020-08-18 17:58:16,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:58:16,691 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 861 transitions. [2020-08-18 17:58:16,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-08-18 17:58:16,702 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:58:16,704 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:58:16,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 17:58:16,706 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:58:16,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:58:16,706 INFO L82 PathProgramCache]: Analyzing trace with hash -724645666, now seen corresponding path program 1 times [2020-08-18 17:58:16,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:58:16,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676819932] [2020-08-18 17:58:16,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:58:16,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:16,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:58:16,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:16,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 17:58:17,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:17,102 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:58:17,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676819932] [2020-08-18 17:58:17,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:58:17,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 17:58:17,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829904542] [2020-08-18 17:58:17,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 17:58:17,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:58:17,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 17:58:17,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 17:58:17,107 INFO L87 Difference]: Start difference. First operand 560 states and 861 transitions. Second operand 7 states. [2020-08-18 17:58:19,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:58:19,163 INFO L93 Difference]: Finished difference Result 1518 states and 2374 transitions. [2020-08-18 17:58:19,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 17:58:19,164 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 148 [2020-08-18 17:58:19,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:58:19,172 INFO L225 Difference]: With dead ends: 1518 [2020-08-18 17:58:19,172 INFO L226 Difference]: Without dead ends: 964 [2020-08-18 17:58:19,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-08-18 17:58:19,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2020-08-18 17:58:19,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 944. [2020-08-18 17:58:19,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 944 states. [2020-08-18 17:58:19,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1336 transitions. [2020-08-18 17:58:19,232 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1336 transitions. Word has length 148 [2020-08-18 17:58:19,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:58:19,233 INFO L479 AbstractCegarLoop]: Abstraction has 944 states and 1336 transitions. [2020-08-18 17:58:19,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 17:58:19,233 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1336 transitions. [2020-08-18 17:58:19,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-08-18 17:58:19,240 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:58:19,240 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:58:19,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 17:58:19,241 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:58:19,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:58:19,241 INFO L82 PathProgramCache]: Analyzing trace with hash 2026240930, now seen corresponding path program 1 times [2020-08-18 17:58:19,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:58:19,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [57412599] [2020-08-18 17:58:19,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:58:19,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:19,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:58:19,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:19,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 17:58:19,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:19,560 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:58:19,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [57412599] [2020-08-18 17:58:19,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:58:19,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 17:58:19,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320060092] [2020-08-18 17:58:19,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 17:58:19,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:58:19,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 17:58:19,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-18 17:58:19,563 INFO L87 Difference]: Start difference. First operand 944 states and 1336 transitions. Second operand 8 states. [2020-08-18 17:58:21,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:58:21,666 INFO L93 Difference]: Finished difference Result 2490 states and 3798 transitions. [2020-08-18 17:58:21,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 17:58:21,669 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 194 [2020-08-18 17:58:21,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:58:21,690 INFO L225 Difference]: With dead ends: 2490 [2020-08-18 17:58:21,691 INFO L226 Difference]: Without dead ends: 1552 [2020-08-18 17:58:21,695 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 17:58:21,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1552 states. [2020-08-18 17:58:21,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1552 to 1518. [2020-08-18 17:58:21,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1518 states. [2020-08-18 17:58:21,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 2119 transitions. [2020-08-18 17:58:21,810 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 2119 transitions. Word has length 194 [2020-08-18 17:58:21,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:58:21,812 INFO L479 AbstractCegarLoop]: Abstraction has 1518 states and 2119 transitions. [2020-08-18 17:58:21,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 17:58:21,813 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 2119 transitions. [2020-08-18 17:58:21,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-08-18 17:58:21,824 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:58:21,824 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:58:21,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 17:58:21,825 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:58:21,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:58:21,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1200176176, now seen corresponding path program 1 times [2020-08-18 17:58:21,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:58:21,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1730099127] [2020-08-18 17:58:21,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:58:21,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:22,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:58:22,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:22,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 17:58:22,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:22,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-18 17:58:22,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:22,290 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 94 proven. 71 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 17:58:22,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1730099127] [2020-08-18 17:58:22,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:58:22,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 17:58:22,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447018111] [2020-08-18 17:58:22,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 17:58:22,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:58:22,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 17:58:22,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-18 17:58:22,296 INFO L87 Difference]: Start difference. First operand 1518 states and 2119 transitions. Second operand 8 states. [2020-08-18 17:58:24,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:58:24,281 INFO L93 Difference]: Finished difference Result 3412 states and 4693 transitions. [2020-08-18 17:58:24,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 17:58:24,282 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 213 [2020-08-18 17:58:24,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:58:24,294 INFO L225 Difference]: With dead ends: 3412 [2020-08-18 17:58:24,295 INFO L226 Difference]: Without dead ends: 1900 [2020-08-18 17:58:24,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-08-18 17:58:24,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1900 states. [2020-08-18 17:58:24,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1900 to 1890. [2020-08-18 17:58:24,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1890 states. [2020-08-18 17:58:24,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 2517 transitions. [2020-08-18 17:58:24,370 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 2517 transitions. Word has length 213 [2020-08-18 17:58:24,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:58:24,371 INFO L479 AbstractCegarLoop]: Abstraction has 1890 states and 2517 transitions. [2020-08-18 17:58:24,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 17:58:24,372 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 2517 transitions. [2020-08-18 17:58:24,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2020-08-18 17:58:24,378 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:58:24,379 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:58:24,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 17:58:24,380 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:58:24,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:58:24,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1683146711, now seen corresponding path program 1 times [2020-08-18 17:58:24,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:58:24,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501146921] [2020-08-18 17:58:24,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:58:24,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:24,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:58:24,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:24,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 17:58:24,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:24,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-18 17:58:24,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:24,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2020-08-18 17:58:24,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:25,122 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 175 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-18 17:58:25,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1501146921] [2020-08-18 17:58:25,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:58:25,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 17:58:25,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116788925] [2020-08-18 17:58:25,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 17:58:25,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:58:25,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 17:58:25,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-18 17:58:25,125 INFO L87 Difference]: Start difference. First operand 1890 states and 2517 transitions. Second operand 9 states. [2020-08-18 17:58:27,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:58:27,755 INFO L93 Difference]: Finished difference Result 3677 states and 4968 transitions. [2020-08-18 17:58:27,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 17:58:27,756 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 297 [2020-08-18 17:58:27,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:58:27,768 INFO L225 Difference]: With dead ends: 3677 [2020-08-18 17:58:27,768 INFO L226 Difference]: Without dead ends: 1930 [2020-08-18 17:58:27,774 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-08-18 17:58:27,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-18 17:58:27,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1882. [2020-08-18 17:58:27,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1882 states. [2020-08-18 17:58:27,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 2280 transitions. [2020-08-18 17:58:27,834 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 2280 transitions. Word has length 297 [2020-08-18 17:58:27,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:58:27,834 INFO L479 AbstractCegarLoop]: Abstraction has 1882 states and 2280 transitions. [2020-08-18 17:58:27,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 17:58:27,835 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 2280 transitions. [2020-08-18 17:58:27,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2020-08-18 17:58:27,844 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:58:27,845 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:58:27,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 17:58:27,846 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:58:27,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:58:27,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1242283415, now seen corresponding path program 1 times [2020-08-18 17:58:27,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:58:27,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [585334470] [2020-08-18 17:58:27,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:58:27,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:28,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:58:28,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:28,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 17:58:28,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:28,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 17:58:28,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:28,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 17:58:28,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:28,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 310 [2020-08-18 17:58:28,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:28,559 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 414 proven. 11 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2020-08-18 17:58:28,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [585334470] [2020-08-18 17:58:28,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:58:28,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 17:58:28,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176101670] [2020-08-18 17:58:28,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 17:58:28,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:58:28,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 17:58:28,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-18 17:58:28,573 INFO L87 Difference]: Start difference. First operand 1882 states and 2280 transitions. Second operand 9 states. [2020-08-18 17:58:33,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:58:33,265 INFO L93 Difference]: Finished difference Result 5238 states and 6410 transitions. [2020-08-18 17:58:33,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-18 17:58:33,266 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 432 [2020-08-18 17:58:33,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:58:33,281 INFO L225 Difference]: With dead ends: 5238 [2020-08-18 17:58:33,282 INFO L226 Difference]: Without dead ends: 3356 [2020-08-18 17:58:33,287 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2020-08-18 17:58:33,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3356 states. [2020-08-18 17:58:33,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3356 to 2438. [2020-08-18 17:58:33,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2438 states. [2020-08-18 17:58:33,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2438 states to 2438 states and 2779 transitions. [2020-08-18 17:58:33,363 INFO L78 Accepts]: Start accepts. Automaton has 2438 states and 2779 transitions. Word has length 432 [2020-08-18 17:58:33,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:58:33,364 INFO L479 AbstractCegarLoop]: Abstraction has 2438 states and 2779 transitions. [2020-08-18 17:58:33,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 17:58:33,364 INFO L276 IsEmpty]: Start isEmpty. Operand 2438 states and 2779 transitions. [2020-08-18 17:58:33,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2020-08-18 17:58:33,381 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:58:33,383 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:58:33,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 17:58:33,384 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:58:33,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:58:33,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1681885400, now seen corresponding path program 1 times [2020-08-18 17:58:33,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:58:33,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1916024668] [2020-08-18 17:58:33,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:58:33,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:33,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:58:33,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:33,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 17:58:33,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:33,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 17:58:33,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:33,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 17:58:33,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:33,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 300 [2020-08-18 17:58:33,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:33,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 412 [2020-08-18 17:58:33,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:34,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1137 backedges. 638 proven. 209 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2020-08-18 17:58:34,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1916024668] [2020-08-18 17:58:34,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:58:34,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 17:58:34,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301509652] [2020-08-18 17:58:34,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 17:58:34,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:58:34,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 17:58:34,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-18 17:58:34,911 INFO L87 Difference]: Start difference. First operand 2438 states and 2779 transitions. Second operand 10 states. [2020-08-18 17:58:38,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:58:38,206 INFO L93 Difference]: Finished difference Result 5701 states and 6650 transitions. [2020-08-18 17:58:38,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 17:58:38,207 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 552 [2020-08-18 17:58:38,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:58:38,222 INFO L225 Difference]: With dead ends: 5701 [2020-08-18 17:58:38,223 INFO L226 Difference]: Without dead ends: 3400 [2020-08-18 17:58:38,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2020-08-18 17:58:38,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3400 states. [2020-08-18 17:58:38,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3400 to 3174. [2020-08-18 17:58:38,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3174 states. [2020-08-18 17:58:38,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3174 states to 3174 states and 3494 transitions. [2020-08-18 17:58:38,304 INFO L78 Accepts]: Start accepts. Automaton has 3174 states and 3494 transitions. Word has length 552 [2020-08-18 17:58:38,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:58:38,305 INFO L479 AbstractCegarLoop]: Abstraction has 3174 states and 3494 transitions. [2020-08-18 17:58:38,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 17:58:38,305 INFO L276 IsEmpty]: Start isEmpty. Operand 3174 states and 3494 transitions. [2020-08-18 17:58:38,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 586 [2020-08-18 17:58:38,320 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:58:38,320 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:58:38,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 17:58:38,321 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:58:38,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:58:38,321 INFO L82 PathProgramCache]: Analyzing trace with hash 60264982, now seen corresponding path program 1 times [2020-08-18 17:58:38,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:58:38,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [385856164] [2020-08-18 17:58:38,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:58:38,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:38,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:58:38,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:38,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 17:58:38,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:38,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 17:58:38,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:38,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 17:58:38,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:38,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 360 [2020-08-18 17:58:39,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:39,675 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 415 proven. 136 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2020-08-18 17:58:39,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [385856164] [2020-08-18 17:58:39,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:58:39,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 17:58:39,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287019827] [2020-08-18 17:58:39,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 17:58:39,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:58:39,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 17:58:39,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-18 17:58:39,678 INFO L87 Difference]: Start difference. First operand 3174 states and 3494 transitions. Second operand 10 states. [2020-08-18 17:58:41,077 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2020-08-18 17:58:42,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:58:42,710 INFO L93 Difference]: Finished difference Result 5994 states and 6641 transitions. [2020-08-18 17:58:42,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 17:58:42,713 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 585 [2020-08-18 17:58:42,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:58:42,726 INFO L225 Difference]: With dead ends: 5994 [2020-08-18 17:58:42,726 INFO L226 Difference]: Without dead ends: 3192 [2020-08-18 17:58:42,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2020-08-18 17:58:42,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3192 states. [2020-08-18 17:58:42,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3192 to 3178. [2020-08-18 17:58:42,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3178 states. [2020-08-18 17:58:42,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 3485 transitions. [2020-08-18 17:58:42,808 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 3485 transitions. Word has length 585 [2020-08-18 17:58:42,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:58:42,809 INFO L479 AbstractCegarLoop]: Abstraction has 3178 states and 3485 transitions. [2020-08-18 17:58:42,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 17:58:42,810 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 3485 transitions. [2020-08-18 17:58:42,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 696 [2020-08-18 17:58:42,818 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:58:42,819 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:58:42,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 17:58:42,821 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:58:42,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:58:42,822 INFO L82 PathProgramCache]: Analyzing trace with hash 762745801, now seen corresponding path program 2 times [2020-08-18 17:58:42,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:58:42,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [554420965] [2020-08-18 17:58:42,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:58:42,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:43,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:58:43,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:43,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 17:58:43,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:43,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 17:58:43,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:43,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 17:58:43,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:43,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 337 [2020-08-18 17:58:43,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:43,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 470 [2020-08-18 17:58:43,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:44,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1354 backedges. 579 proven. 140 refuted. 0 times theorem prover too weak. 635 trivial. 0 not checked. [2020-08-18 17:58:44,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [554420965] [2020-08-18 17:58:44,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:58:44,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 17:58:44,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345461103] [2020-08-18 17:58:44,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 17:58:44,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:58:44,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 17:58:44,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-18 17:58:44,290 INFO L87 Difference]: Start difference. First operand 3178 states and 3485 transitions. Second operand 9 states. [2020-08-18 17:58:46,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:58:46,659 INFO L93 Difference]: Finished difference Result 6354 states and 6980 transitions. [2020-08-18 17:58:46,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 17:58:46,660 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 695 [2020-08-18 17:58:46,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:58:46,673 INFO L225 Difference]: With dead ends: 6354 [2020-08-18 17:58:46,673 INFO L226 Difference]: Without dead ends: 3364 [2020-08-18 17:58:46,680 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-08-18 17:58:46,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3364 states. [2020-08-18 17:58:46,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3364 to 3178. [2020-08-18 17:58:46,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3178 states. [2020-08-18 17:58:46,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 3483 transitions. [2020-08-18 17:58:46,747 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 3483 transitions. Word has length 695 [2020-08-18 17:58:46,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:58:46,748 INFO L479 AbstractCegarLoop]: Abstraction has 3178 states and 3483 transitions. [2020-08-18 17:58:46,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 17:58:46,748 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 3483 transitions. [2020-08-18 17:58:46,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 703 [2020-08-18 17:58:46,761 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:58:46,761 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:58:46,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 17:58:46,764 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:58:46,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:58:46,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1185073778, now seen corresponding path program 1 times [2020-08-18 17:58:46,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:58:46,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [512638548] [2020-08-18 17:58:46,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:58:46,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:47,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:58:47,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:47,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 17:58:47,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:47,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 17:58:47,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:47,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 17:58:47,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:47,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-18 17:58:47,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:47,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 477 [2020-08-18 17:58:47,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:47,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 586 proven. 140 refuted. 0 times theorem prover too weak. 642 trivial. 0 not checked. [2020-08-18 17:58:47,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [512638548] [2020-08-18 17:58:47,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:58:47,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 17:58:47,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453779890] [2020-08-18 17:58:47,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 17:58:47,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:58:47,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 17:58:47,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-18 17:58:47,964 INFO L87 Difference]: Start difference. First operand 3178 states and 3483 transitions. Second operand 10 states. [2020-08-18 17:58:49,719 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2020-08-18 17:58:51,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:58:51,506 INFO L93 Difference]: Finished difference Result 6540 states and 7198 transitions. [2020-08-18 17:58:51,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 17:58:51,512 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 702 [2020-08-18 17:58:51,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:58:51,528 INFO L225 Difference]: With dead ends: 6540 [2020-08-18 17:58:51,528 INFO L226 Difference]: Without dead ends: 3552 [2020-08-18 17:58:51,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2020-08-18 17:58:51,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3552 states. [2020-08-18 17:58:51,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3552 to 3548. [2020-08-18 17:58:51,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3548 states. [2020-08-18 17:58:51,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3548 states to 3548 states and 3868 transitions. [2020-08-18 17:58:51,607 INFO L78 Accepts]: Start accepts. Automaton has 3548 states and 3868 transitions. Word has length 702 [2020-08-18 17:58:51,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:58:51,608 INFO L479 AbstractCegarLoop]: Abstraction has 3548 states and 3868 transitions. [2020-08-18 17:58:51,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 17:58:51,608 INFO L276 IsEmpty]: Start isEmpty. Operand 3548 states and 3868 transitions. [2020-08-18 17:58:51,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 729 [2020-08-18 17:58:51,617 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:58:51,618 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:58:51,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 17:58:51,619 INFO L427 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:58:51,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:58:51,619 INFO L82 PathProgramCache]: Analyzing trace with hash 326490438, now seen corresponding path program 1 times [2020-08-18 17:58:51,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:58:51,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1208420149] [2020-08-18 17:58:51,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:58:51,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:51,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:58:51,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:51,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 17:58:51,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:51,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 17:58:51,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:51,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 17:58:51,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:51,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-18 17:58:52,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:52,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-08-18 17:58:52,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:52,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1394 backedges. 733 proven. 2 refuted. 0 times theorem prover too weak. 659 trivial. 0 not checked. [2020-08-18 17:58:52,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1208420149] [2020-08-18 17:58:52,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:58:52,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 17:58:52,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954382315] [2020-08-18 17:58:52,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 17:58:52,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:58:52,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 17:58:52,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 17:58:52,431 INFO L87 Difference]: Start difference. First operand 3548 states and 3868 transitions. Second operand 7 states. [2020-08-18 17:58:53,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:58:53,851 INFO L93 Difference]: Finished difference Result 8032 states and 8888 transitions. [2020-08-18 17:58:53,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 17:58:53,852 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 728 [2020-08-18 17:58:53,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:58:53,869 INFO L225 Difference]: With dead ends: 8032 [2020-08-18 17:58:53,870 INFO L226 Difference]: Without dead ends: 4674 [2020-08-18 17:58:53,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-08-18 17:58:53,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4674 states. [2020-08-18 17:58:53,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4674 to 4292. [2020-08-18 17:58:53,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4292 states. [2020-08-18 17:58:53,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4292 states to 4292 states and 4748 transitions. [2020-08-18 17:58:53,985 INFO L78 Accepts]: Start accepts. Automaton has 4292 states and 4748 transitions. Word has length 728 [2020-08-18 17:58:53,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:58:53,986 INFO L479 AbstractCegarLoop]: Abstraction has 4292 states and 4748 transitions. [2020-08-18 17:58:53,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 17:58:53,987 INFO L276 IsEmpty]: Start isEmpty. Operand 4292 states and 4748 transitions. [2020-08-18 17:58:54,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 784 [2020-08-18 17:58:54,001 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:58:54,001 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:58:54,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 17:58:54,002 INFO L427 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:58:54,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:58:54,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1244120290, now seen corresponding path program 1 times [2020-08-18 17:58:54,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:58:54,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621714621] [2020-08-18 17:58:54,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:58:54,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:54,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:58:54,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:54,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 17:58:54,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:54,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 17:58:54,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:54,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 17:58:54,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:54,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-18 17:58:54,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:54,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 425 [2020-08-18 17:58:54,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:54,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 558 [2020-08-18 17:58:54,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:54,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 291 proven. 6 refuted. 0 times theorem prover too weak. 1523 trivial. 0 not checked. [2020-08-18 17:58:54,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1621714621] [2020-08-18 17:58:54,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:58:54,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 17:58:54,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107011530] [2020-08-18 17:58:54,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:58:54,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:58:54,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:58:54,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:58:54,928 INFO L87 Difference]: Start difference. First operand 4292 states and 4748 transitions. Second operand 5 states. [2020-08-18 17:58:56,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:58:56,086 INFO L93 Difference]: Finished difference Result 4296 states and 4751 transitions. [2020-08-18 17:58:56,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:58:56,086 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 783 [2020-08-18 17:58:56,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:58:56,099 INFO L225 Difference]: With dead ends: 4296 [2020-08-18 17:58:56,099 INFO L226 Difference]: Without dead ends: 4294 [2020-08-18 17:58:56,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:58:56,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4294 states. [2020-08-18 17:58:56,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4294 to 4292. [2020-08-18 17:58:56,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4292 states. [2020-08-18 17:58:56,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4292 states to 4292 states and 4747 transitions. [2020-08-18 17:58:56,177 INFO L78 Accepts]: Start accepts. Automaton has 4292 states and 4747 transitions. Word has length 783 [2020-08-18 17:58:56,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:58:56,178 INFO L479 AbstractCegarLoop]: Abstraction has 4292 states and 4747 transitions. [2020-08-18 17:58:56,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:58:56,179 INFO L276 IsEmpty]: Start isEmpty. Operand 4292 states and 4747 transitions. [2020-08-18 17:58:56,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 829 [2020-08-18 17:58:56,193 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:58:56,193 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:58:56,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 17:58:56,194 INFO L427 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:58:56,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:58:56,194 INFO L82 PathProgramCache]: Analyzing trace with hash 277730204, now seen corresponding path program 1 times [2020-08-18 17:58:56,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:58:56,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [886470474] [2020-08-18 17:58:56,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:58:56,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:56,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:58:56,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:56,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 17:58:56,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:56,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 17:58:56,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:56,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 17:58:56,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:56,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-18 17:58:56,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:56,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-08-18 17:58:56,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:56,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 576 [2020-08-18 17:58:56,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:56,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 688 [2020-08-18 17:58:56,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:57,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2344 backedges. 340 proven. 7 refuted. 0 times theorem prover too weak. 1997 trivial. 0 not checked. [2020-08-18 17:58:57,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [886470474] [2020-08-18 17:58:57,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:58:57,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 17:58:57,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057712997] [2020-08-18 17:58:57,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:58:57,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:58:57,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:58:57,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:58:57,151 INFO L87 Difference]: Start difference. First operand 4292 states and 4747 transitions. Second operand 5 states. [2020-08-18 17:58:58,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:58:58,336 INFO L93 Difference]: Finished difference Result 4668 states and 5158 transitions. [2020-08-18 17:58:58,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:58:58,341 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 828 [2020-08-18 17:58:58,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:58:58,354 INFO L225 Difference]: With dead ends: 4668 [2020-08-18 17:58:58,355 INFO L226 Difference]: Without dead ends: 4666 [2020-08-18 17:58:58,357 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:58:58,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4666 states. [2020-08-18 17:58:58,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4666 to 4292. [2020-08-18 17:58:58,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4292 states. [2020-08-18 17:58:58,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4292 states to 4292 states and 4751 transitions. [2020-08-18 17:58:58,431 INFO L78 Accepts]: Start accepts. Automaton has 4292 states and 4751 transitions. Word has length 828 [2020-08-18 17:58:58,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:58:58,432 INFO L479 AbstractCegarLoop]: Abstraction has 4292 states and 4751 transitions. [2020-08-18 17:58:58,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:58:58,432 INFO L276 IsEmpty]: Start isEmpty. Operand 4292 states and 4751 transitions. [2020-08-18 17:58:58,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 840 [2020-08-18 17:58:58,446 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:58:58,447 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:58:58,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 17:58:58,447 INFO L427 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:58:58,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:58:58,448 INFO L82 PathProgramCache]: Analyzing trace with hash 117494447, now seen corresponding path program 1 times [2020-08-18 17:58:58,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:58:58,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856211816] [2020-08-18 17:58:58,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:58:58,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:58,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:58:58,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:58,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 17:58:58,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:58,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 17:58:58,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:58,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 17:58:58,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:58,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-18 17:58:58,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:58,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-08-18 17:58:58,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:58,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 576 [2020-08-18 17:58:58,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:58,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 688 [2020-08-18 17:58:58,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:58:59,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2399 backedges. 337 proven. 28 refuted. 0 times theorem prover too weak. 2034 trivial. 0 not checked. [2020-08-18 17:58:59,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856211816] [2020-08-18 17:58:59,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:58:59,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 17:58:59,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299772031] [2020-08-18 17:58:59,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 17:58:59,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:58:59,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 17:58:59,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-18 17:58:59,306 INFO L87 Difference]: Start difference. First operand 4292 states and 4751 transitions. Second operand 7 states. [2020-08-18 17:59:01,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:59:01,833 INFO L93 Difference]: Finished difference Result 4854 states and 5352 transitions. [2020-08-18 17:59:01,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 17:59:01,834 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 839 [2020-08-18 17:59:01,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:59:01,836 INFO L225 Difference]: With dead ends: 4854 [2020-08-18 17:59:01,836 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 17:59:01,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-08-18 17:59:01,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 17:59:01,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 17:59:01,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 17:59:01,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 17:59:01,845 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 839 [2020-08-18 17:59:01,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:59:01,845 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 17:59:01,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 17:59:01,846 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 17:59:01,846 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 17:59:01,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 17:59:01,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 17:59:02,400 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 163 [2020-08-18 17:59:02,633 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 163