/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 --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem10_label40.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 15:03:36,072 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-09-24 15:03:36,141 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 15:03:36,144 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 15:03:36,147 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 15:03:36,148 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 15:03:36,150 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 15:03:36,151 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 15:03:36,153 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 15:03:36,161 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 15:03:36,163 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 15:03:36,164 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 15:03:36,165 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 15:03:36,166 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 15:03:36,179 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-24 15:03:36,196 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 15:03:36,197 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 15:03:36,198 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 15:03:36,199 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 [2020-09-24 15:03:36,240 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 15:03:36,241 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 15:03:36,243 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 15:03:36,243 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 15:03:36,243 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 15:03:36,243 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 15:03:36,244 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 15:03:36,244 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 15:03:36,244 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 15:03:36,244 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 15:03:36,245 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 15:03:36,245 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 15:03:36,246 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 15:03:36,246 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 15:03:36,246 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 15:03:36,247 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 15:03:36,247 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 15:03:36,247 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 15:03:36,247 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 15:03:36,247 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 15:03:36,248 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 15:03:36,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 15:03:36,248 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 15:03:36,248 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 15:03:36,249 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 15:03:36,249 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 15:03:36,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 15:03:36,249 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 15:03:36,249 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 15:03:36,250 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.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-09-24 15:03:36,694 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 15:03:36,719 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 15:03:36,724 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 15:03:36,727 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 15:03:36,728 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 15:03:36,729 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label40.c [2020-09-24 15:03:36,818 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c6fbdc925/a286f5bb9ffc42d18d6fd93ab11e3c93/FLAGc9b6345f2 [2020-09-24 15:03:37,414 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 15:03:37,416 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem10_label40.c [2020-09-24 15:03:37,434 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c6fbdc925/a286f5bb9ffc42d18d6fd93ab11e3c93/FLAGc9b6345f2 [2020-09-24 15:03:37,678 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c6fbdc925/a286f5bb9ffc42d18d6fd93ab11e3c93 [2020-09-24 15:03:37,691 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 15:03:37,697 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 15:03:37,698 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 15:03:37,698 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 15:03:37,703 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 15:03:37,704 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:03:37" (1/1) ... [2020-09-24 15:03:37,708 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ad15a05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:03:37, skipping insertion in model container [2020-09-24 15:03:37,708 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:03:37" (1/1) ... [2020-09-24 15:03:37,717 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 15:03:37,788 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 15:03:38,244 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 15:03:38,249 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 15:03:38,452 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 15:03:38,477 INFO L208 MainTranslator]: Completed translation [2020-09-24 15:03:38,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:03:38 WrapperNode [2020-09-24 15:03:38,478 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 15:03:38,479 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 15:03:38,479 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 15:03:38,479 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 15:03:38,496 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:03:38" (1/1) ... [2020-09-24 15:03:38,496 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:03:38" (1/1) ... [2020-09-24 15:03:38,520 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:03:38" (1/1) ... [2020-09-24 15:03:38,524 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:03:38" (1/1) ... [2020-09-24 15:03:38,563 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:03:38" (1/1) ... [2020-09-24 15:03:38,584 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:03:38" (1/1) ... [2020-09-24 15:03:38,590 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:03:38" (1/1) ... [2020-09-24 15:03:38,599 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 15:03:38,600 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 15:03:38,600 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 15:03:38,600 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 15:03:38,602 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:03:38" (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 [2020-09-24 15:03:38,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 15:03:38,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 15:03:38,693 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 15:03:38,693 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 15:03:38,694 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 15:03:38,694 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 15:03:38,694 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 15:03:38,695 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 15:03:38,695 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 15:03:38,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 15:03:38,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 15:03:40,187 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 15:03:40,188 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 15:03:40,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:03:40 BoogieIcfgContainer [2020-09-24 15:03:40,197 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 15:03:40,199 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 15:03:40,199 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 15:03:40,203 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 15:03:40,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 03:03:37" (1/3) ... [2020-09-24 15:03:40,205 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b9dacaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:03:40, skipping insertion in model container [2020-09-24 15:03:40,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:03:38" (2/3) ... [2020-09-24 15:03:40,205 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b9dacaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:03:40, skipping insertion in model container [2020-09-24 15:03:40,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:03:40" (3/3) ... [2020-09-24 15:03:40,208 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label40.c [2020-09-24 15:03:40,222 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 15:03:40,234 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 15:03:40,256 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 15:03:40,290 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 15:03:40,290 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 15:03:40,291 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 15:03:40,291 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 15:03:40,291 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 15:03:40,291 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 15:03:40,291 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 15:03:40,291 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 15:03:40,322 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states. [2020-09-24 15:03:40,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-09-24 15:03:40,333 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:03:40,334 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:03:40,335 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:03:40,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:03:40,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1046899727, now seen corresponding path program 1 times [2020-09-24 15:03:40,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:03:40,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1939204010] [2020-09-24 15:03:40,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:03:40,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:40,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:03:40,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:40,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:03:40,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1939204010] [2020-09-24 15:03:40,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:03:40,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 15:03:40,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029061478] [2020-09-24 15:03:40,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 15:03:40,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:03:40,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 15:03:40,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 15:03:40,888 INFO L87 Difference]: Start difference. First operand 456 states. Second operand 5 states. [2020-09-24 15:03:43,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:03:43,311 INFO L93 Difference]: Finished difference Result 1226 states and 1797 transitions. [2020-09-24 15:03:43,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 15:03:43,313 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-09-24 15:03:43,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:03:43,341 INFO L225 Difference]: With dead ends: 1226 [2020-09-24 15:03:43,342 INFO L226 Difference]: Without dead ends: 707 [2020-09-24 15:03:43,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-24 15:03:43,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2020-09-24 15:03:43,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 695. [2020-09-24 15:03:43,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 695 states. [2020-09-24 15:03:43,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 926 transitions. [2020-09-24 15:03:43,470 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 926 transitions. Word has length 68 [2020-09-24 15:03:43,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:03:43,471 INFO L479 AbstractCegarLoop]: Abstraction has 695 states and 926 transitions. [2020-09-24 15:03:43,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 15:03:43,471 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 926 transitions. [2020-09-24 15:03:43,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-09-24 15:03:43,481 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:03:43,481 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:03:43,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 15:03:43,482 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:03:43,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:03:43,483 INFO L82 PathProgramCache]: Analyzing trace with hash -160289432, now seen corresponding path program 1 times [2020-09-24 15:03:43,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:03:43,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523097250] [2020-09-24 15:03:43,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:03:43,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:43,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:03:43,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:43,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:03:43,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:43,819 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:03:43,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523097250] [2020-09-24 15:03:43,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:03:43,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 15:03:43,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969482440] [2020-09-24 15:03:43,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 15:03:43,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:03:43,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 15:03:43,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 15:03:43,824 INFO L87 Difference]: Start difference. First operand 695 states and 926 transitions. Second operand 8 states. [2020-09-24 15:03:46,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:03:46,156 INFO L93 Difference]: Finished difference Result 1559 states and 2130 transitions. [2020-09-24 15:03:46,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 15:03:46,157 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 151 [2020-09-24 15:03:46,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:03:46,167 INFO L225 Difference]: With dead ends: 1559 [2020-09-24 15:03:46,168 INFO L226 Difference]: Without dead ends: 879 [2020-09-24 15:03:46,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-09-24 15:03:46,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2020-09-24 15:03:46,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 853. [2020-09-24 15:03:46,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 853 states. [2020-09-24 15:03:46,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 1090 transitions. [2020-09-24 15:03:46,238 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 1090 transitions. Word has length 151 [2020-09-24 15:03:46,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:03:46,241 INFO L479 AbstractCegarLoop]: Abstraction has 853 states and 1090 transitions. [2020-09-24 15:03:46,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 15:03:46,241 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 1090 transitions. [2020-09-24 15:03:46,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-09-24 15:03:46,258 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:03:46,259 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:03:46,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 15:03:46,259 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:03:46,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:03:46,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1824017853, now seen corresponding path program 1 times [2020-09-24 15:03:46,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:03:46,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1044376295] [2020-09-24 15:03:46,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:03:46,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:46,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:03:46,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:46,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:03:46,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:46,672 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:03:46,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1044376295] [2020-09-24 15:03:46,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:03:46,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 15:03:46,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246657044] [2020-09-24 15:03:46,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 15:03:46,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:03:46,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 15:03:46,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 15:03:46,681 INFO L87 Difference]: Start difference. First operand 853 states and 1090 transitions. Second operand 8 states. [2020-09-24 15:03:49,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:03:49,367 INFO L93 Difference]: Finished difference Result 2976 states and 4114 transitions. [2020-09-24 15:03:49,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 15:03:49,368 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 157 [2020-09-24 15:03:49,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:03:49,383 INFO L225 Difference]: With dead ends: 2976 [2020-09-24 15:03:49,383 INFO L226 Difference]: Without dead ends: 2138 [2020-09-24 15:03:49,388 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-09-24 15:03:49,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2138 states. [2020-09-24 15:03:49,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2138 to 1839. [2020-09-24 15:03:49,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1839 states. [2020-09-24 15:03:49,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1839 states to 1839 states and 2431 transitions. [2020-09-24 15:03:49,464 INFO L78 Accepts]: Start accepts. Automaton has 1839 states and 2431 transitions. Word has length 157 [2020-09-24 15:03:49,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:03:49,465 INFO L479 AbstractCegarLoop]: Abstraction has 1839 states and 2431 transitions. [2020-09-24 15:03:49,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 15:03:49,465 INFO L276 IsEmpty]: Start isEmpty. Operand 1839 states and 2431 transitions. [2020-09-24 15:03:49,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-09-24 15:03:49,468 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:03:49,469 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:03:49,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 15:03:49,469 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:03:49,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:03:49,469 INFO L82 PathProgramCache]: Analyzing trace with hash -835987883, now seen corresponding path program 1 times [2020-09-24 15:03:49,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:03:49,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1928260018] [2020-09-24 15:03:49,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:03:49,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:49,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:03:49,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:49,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:03:49,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:49,722 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:03:49,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1928260018] [2020-09-24 15:03:49,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:03:49,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 15:03:49,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268545399] [2020-09-24 15:03:49,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 15:03:49,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:03:49,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 15:03:49,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 15:03:49,725 INFO L87 Difference]: Start difference. First operand 1839 states and 2431 transitions. Second operand 7 states. [2020-09-24 15:03:53,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:03:53,906 INFO L93 Difference]: Finished difference Result 4381 states and 5912 transitions. [2020-09-24 15:03:53,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 15:03:53,907 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 166 [2020-09-24 15:03:53,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:03:53,921 INFO L225 Difference]: With dead ends: 4381 [2020-09-24 15:03:53,921 INFO L226 Difference]: Without dead ends: 2557 [2020-09-24 15:03:53,926 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-24 15:03:53,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2557 states. [2020-09-24 15:03:53,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2557 to 2192. [2020-09-24 15:03:53,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2192 states. [2020-09-24 15:03:53,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2192 states to 2192 states and 2939 transitions. [2020-09-24 15:03:53,999 INFO L78 Accepts]: Start accepts. Automaton has 2192 states and 2939 transitions. Word has length 166 [2020-09-24 15:03:53,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:03:54,000 INFO L479 AbstractCegarLoop]: Abstraction has 2192 states and 2939 transitions. [2020-09-24 15:03:54,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 15:03:54,000 INFO L276 IsEmpty]: Start isEmpty. Operand 2192 states and 2939 transitions. [2020-09-24 15:03:54,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-09-24 15:03:54,005 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:03:54,005 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:03:54,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 15:03:54,006 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:03:54,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:03:54,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1830974367, now seen corresponding path program 1 times [2020-09-24 15:03:54,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:03:54,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118894550] [2020-09-24 15:03:54,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:03:54,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:54,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:03:54,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:54,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:03:54,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:54,262 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:03:54,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118894550] [2020-09-24 15:03:54,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:03:54,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 15:03:54,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047668355] [2020-09-24 15:03:54,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 15:03:54,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:03:54,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 15:03:54,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 15:03:54,265 INFO L87 Difference]: Start difference. First operand 2192 states and 2939 transitions. Second operand 8 states. [2020-09-24 15:03:57,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:03:57,777 INFO L93 Difference]: Finished difference Result 6109 states and 8514 transitions. [2020-09-24 15:03:57,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-24 15:03:57,779 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 190 [2020-09-24 15:03:57,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:03:57,800 INFO L225 Difference]: With dead ends: 6109 [2020-09-24 15:03:57,801 INFO L226 Difference]: Without dead ends: 4082 [2020-09-24 15:03:57,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-09-24 15:03:57,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4082 states. [2020-09-24 15:03:57,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4082 to 3878. [2020-09-24 15:03:57,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3878 states. [2020-09-24 15:03:57,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 5050 transitions. [2020-09-24 15:03:57,922 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 5050 transitions. Word has length 190 [2020-09-24 15:03:57,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:03:57,923 INFO L479 AbstractCegarLoop]: Abstraction has 3878 states and 5050 transitions. [2020-09-24 15:03:57,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 15:03:57,923 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 5050 transitions. [2020-09-24 15:03:57,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-09-24 15:03:57,927 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:03:57,927 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:03:57,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 15:03:57,928 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:03:57,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:03:57,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1089799840, now seen corresponding path program 1 times [2020-09-24 15:03:57,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:03:57,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1428928553] [2020-09-24 15:03:57,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:03:57,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:58,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:03:58,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:58,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:03:58,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:58,225 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:03:58,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1428928553] [2020-09-24 15:03:58,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:03:58,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 15:03:58,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995066321] [2020-09-24 15:03:58,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 15:03:58,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:03:58,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 15:03:58,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 15:03:58,232 INFO L87 Difference]: Start difference. First operand 3878 states and 5050 transitions. Second operand 7 states. [2020-09-24 15:04:00,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:04:00,588 INFO L93 Difference]: Finished difference Result 7624 states and 10008 transitions. [2020-09-24 15:04:00,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 15:04:00,593 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 195 [2020-09-24 15:04:00,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:04:00,613 INFO L225 Difference]: With dead ends: 7624 [2020-09-24 15:04:00,613 INFO L226 Difference]: Without dead ends: 3911 [2020-09-24 15:04:00,623 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-09-24 15:04:00,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3911 states. [2020-09-24 15:04:00,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3911 to 3894. [2020-09-24 15:04:00,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3894 states. [2020-09-24 15:04:00,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3894 states to 3894 states and 5093 transitions. [2020-09-24 15:04:00,728 INFO L78 Accepts]: Start accepts. Automaton has 3894 states and 5093 transitions. Word has length 195 [2020-09-24 15:04:00,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:04:00,729 INFO L479 AbstractCegarLoop]: Abstraction has 3894 states and 5093 transitions. [2020-09-24 15:04:00,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 15:04:00,729 INFO L276 IsEmpty]: Start isEmpty. Operand 3894 states and 5093 transitions. [2020-09-24 15:04:00,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-09-24 15:04:00,734 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:04:00,734 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:04:00,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 15:04:00,735 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:04:00,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:04:00,736 INFO L82 PathProgramCache]: Analyzing trace with hash 706836333, now seen corresponding path program 1 times [2020-09-24 15:04:00,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:04:00,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [419367978] [2020-09-24 15:04:00,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:04:00,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:00,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:04:00,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:00,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:04:00,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:00,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-09-24 15:04:00,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:01,042 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 170 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 15:04:01,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [419367978] [2020-09-24 15:04:01,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:04:01,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 15:04:01,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159980859] [2020-09-24 15:04:01,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 15:04:01,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:04:01,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 15:04:01,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-24 15:04:01,046 INFO L87 Difference]: Start difference. First operand 3894 states and 5093 transitions. Second operand 10 states. [2020-09-24 15:04:06,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:04:06,510 INFO L93 Difference]: Finished difference Result 9355 states and 12299 transitions. [2020-09-24 15:04:06,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-24 15:04:06,511 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 236 [2020-09-24 15:04:06,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:04:06,534 INFO L225 Difference]: With dead ends: 9355 [2020-09-24 15:04:06,534 INFO L226 Difference]: Without dead ends: 5626 [2020-09-24 15:04:06,547 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2020-09-24 15:04:06,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5626 states. [2020-09-24 15:04:06,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5626 to 3952. [2020-09-24 15:04:06,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3952 states. [2020-09-24 15:04:06,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3952 states to 3952 states and 4831 transitions. [2020-09-24 15:04:06,660 INFO L78 Accepts]: Start accepts. Automaton has 3952 states and 4831 transitions. Word has length 236 [2020-09-24 15:04:06,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:04:06,661 INFO L479 AbstractCegarLoop]: Abstraction has 3952 states and 4831 transitions. [2020-09-24 15:04:06,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 15:04:06,661 INFO L276 IsEmpty]: Start isEmpty. Operand 3952 states and 4831 transitions. [2020-09-24 15:04:06,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2020-09-24 15:04:06,667 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:04:06,668 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-24 15:04:06,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 15:04:06,669 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:04:06,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:04:06,669 INFO L82 PathProgramCache]: Analyzing trace with hash -585547793, now seen corresponding path program 1 times [2020-09-24 15:04:06,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:04:06,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [90446936] [2020-09-24 15:04:06,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:04:06,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:06,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:04:06,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:06,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:04:06,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:06,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-09-24 15:04:06,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:07,141 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 107 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-09-24 15:04:07,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [90446936] [2020-09-24 15:04:07,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:04:07,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 15:04:07,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411762862] [2020-09-24 15:04:07,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 15:04:07,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:04:07,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 15:04:07,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-09-24 15:04:07,143 INFO L87 Difference]: Start difference. First operand 3952 states and 4831 transitions. Second operand 10 states. [2020-09-24 15:04:11,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:04:11,111 INFO L93 Difference]: Finished difference Result 9063 states and 11175 transitions. [2020-09-24 15:04:11,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-24 15:04:11,112 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 269 [2020-09-24 15:04:11,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:04:11,131 INFO L225 Difference]: With dead ends: 9063 [2020-09-24 15:04:11,132 INFO L226 Difference]: Without dead ends: 5244 [2020-09-24 15:04:11,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2020-09-24 15:04:11,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5244 states. [2020-09-24 15:04:11,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5244 to 4901. [2020-09-24 15:04:11,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4901 states. [2020-09-24 15:04:11,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4901 states to 4901 states and 6049 transitions. [2020-09-24 15:04:11,248 INFO L78 Accepts]: Start accepts. Automaton has 4901 states and 6049 transitions. Word has length 269 [2020-09-24 15:04:11,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:04:11,248 INFO L479 AbstractCegarLoop]: Abstraction has 4901 states and 6049 transitions. [2020-09-24 15:04:11,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 15:04:11,249 INFO L276 IsEmpty]: Start isEmpty. Operand 4901 states and 6049 transitions. [2020-09-24 15:04:11,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2020-09-24 15:04:11,260 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:04:11,260 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-09-24 15:04:11,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 15:04:11,261 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:04:11,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:04:11,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1995565262, now seen corresponding path program 1 times [2020-09-24 15:04:11,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:04:11,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2013278290] [2020-09-24 15:04:11,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:04:11,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:11,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:04:11,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:11,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:04:11,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:11,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-09-24 15:04:11,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:11,680 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 179 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 15:04:11,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2013278290] [2020-09-24 15:04:11,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:04:11,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 15:04:11,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44231073] [2020-09-24 15:04:11,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 15:04:11,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:04:11,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 15:04:11,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-24 15:04:11,691 INFO L87 Difference]: Start difference. First operand 4901 states and 6049 transitions. Second operand 11 states. [2020-09-24 15:04:16,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:04:16,180 INFO L93 Difference]: Finished difference Result 12653 states and 15868 transitions. [2020-09-24 15:04:16,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 15:04:16,180 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 284 [2020-09-24 15:04:16,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:04:16,201 INFO L225 Difference]: With dead ends: 12653 [2020-09-24 15:04:16,201 INFO L226 Difference]: Without dead ends: 5690 [2020-09-24 15:04:16,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2020-09-24 15:04:16,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5690 states. [2020-09-24 15:04:16,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5690 to 4181. [2020-09-24 15:04:16,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4181 states. [2020-09-24 15:04:16,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4181 states to 4181 states and 4764 transitions. [2020-09-24 15:04:16,302 INFO L78 Accepts]: Start accepts. Automaton has 4181 states and 4764 transitions. Word has length 284 [2020-09-24 15:04:16,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:04:16,303 INFO L479 AbstractCegarLoop]: Abstraction has 4181 states and 4764 transitions. [2020-09-24 15:04:16,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 15:04:16,303 INFO L276 IsEmpty]: Start isEmpty. Operand 4181 states and 4764 transitions. [2020-09-24 15:04:16,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-09-24 15:04:16,313 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:04:16,314 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-09-24 15:04:16,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 15:04:16,314 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:04:16,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:04:16,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1248385123, now seen corresponding path program 1 times [2020-09-24 15:04:16,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:04:16,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981818799] [2020-09-24 15:04:16,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:04:16,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:16,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:04:16,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:16,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:04:16,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:16,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2020-09-24 15:04:16,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:17,137 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 191 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 15:04:17,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981818799] [2020-09-24 15:04:17,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:04:17,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 15:04:17,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747925419] [2020-09-24 15:04:17,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 15:04:17,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:04:17,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 15:04:17,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-09-24 15:04:17,140 INFO L87 Difference]: Start difference. First operand 4181 states and 4764 transitions. Second operand 15 states. [2020-09-24 15:04:20,847 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2020-09-24 15:04:23,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:04:23,910 INFO L93 Difference]: Finished difference Result 8870 states and 10171 transitions. [2020-09-24 15:04:23,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-24 15:04:23,911 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 319 [2020-09-24 15:04:23,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:04:23,931 INFO L225 Difference]: With dead ends: 8870 [2020-09-24 15:04:23,932 INFO L226 Difference]: Without dead ends: 4859 [2020-09-24 15:04:23,940 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=349, Invalid=1211, Unknown=0, NotChecked=0, Total=1560 [2020-09-24 15:04:23,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4859 states. [2020-09-24 15:04:24,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4859 to 4335. [2020-09-24 15:04:24,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4335 states. [2020-09-24 15:04:24,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4335 states to 4335 states and 4924 transitions. [2020-09-24 15:04:24,029 INFO L78 Accepts]: Start accepts. Automaton has 4335 states and 4924 transitions. Word has length 319 [2020-09-24 15:04:24,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:04:24,030 INFO L479 AbstractCegarLoop]: Abstraction has 4335 states and 4924 transitions. [2020-09-24 15:04:24,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 15:04:24,030 INFO L276 IsEmpty]: Start isEmpty. Operand 4335 states and 4924 transitions. [2020-09-24 15:04:24,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-09-24 15:04:24,047 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:04:24,047 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-09-24 15:04:24,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 15:04:24,048 INFO L427 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:04:24,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:04:24,049 INFO L82 PathProgramCache]: Analyzing trace with hash -2128216036, now seen corresponding path program 1 times [2020-09-24 15:04:24,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:04:24,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1457071628] [2020-09-24 15:04:24,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:04:24,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:24,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:04:24,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:24,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:04:24,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:24,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2020-09-24 15:04:24,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:24,459 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 107 proven. 2 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2020-09-24 15:04:24,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1457071628] [2020-09-24 15:04:24,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:04:24,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 15:04:24,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530825410] [2020-09-24 15:04:24,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 15:04:24,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:04:24,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 15:04:24,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 15:04:24,462 INFO L87 Difference]: Start difference. First operand 4335 states and 4924 transitions. Second operand 5 states. [2020-09-24 15:04:26,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:04:26,487 INFO L93 Difference]: Finished difference Result 9478 states and 10796 transitions. [2020-09-24 15:04:26,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 15:04:26,488 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 337 [2020-09-24 15:04:26,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:04:26,489 INFO L225 Difference]: With dead ends: 9478 [2020-09-24 15:04:26,489 INFO L226 Difference]: Without dead ends: 0 [2020-09-24 15:04:26,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-24 15:04:26,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-24 15:04:26,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-24 15:04:26,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-24 15:04:26,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-24 15:04:26,503 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 337 [2020-09-24 15:04:26,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:04:26,504 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-24 15:04:26,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 15:04:26,504 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-24 15:04:26,504 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-24 15:04:26,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 15:04:26,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-24 15:04:27,820 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2020-09-24 15:04:29,293 WARN L193 SmtUtils]: Spent 580.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 180 [2020-09-24 15:04:29,817 WARN L193 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 180 [2020-09-24 15:04:31,702 WARN L193 SmtUtils]: Spent 1.76 s on a formula simplification. DAG size of input: 321 DAG size of output: 48