/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 false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 15:33:20,103 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-18 15:33:20,139 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 15:33:20,139 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 15:33:20,140 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 15:33:20,141 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 15:33:20,142 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 15:33:20,143 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 15:33:20,145 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 15:33:20,146 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 15:33:20,148 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 15:33:20,149 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 15:33:20,150 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 15:33:20,154 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 15:33:20,157 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 15:33:20,170 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 15:33:20,171 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 15:33:20,171 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 15:33:20,172 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 15:33:20,196 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 15:33:20,196 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 15:33:20,197 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 15:33:20,198 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 15:33:20,198 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 15:33:20,198 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 15:33:20,198 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 15:33:20,198 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 15:33:20,199 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 15:33:20,199 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 15:33:20,199 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 15:33:20,199 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 15:33:20,199 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 15:33:20,200 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 15:33:20,200 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 15:33:20,200 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 15:33:20,200 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 15:33:20,200 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 15:33:20,201 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 15:33:20,201 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 15:33:20,201 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 15:33:20,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 15:33:20,202 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 15:33:20,202 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 15:33:20,202 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 15:33:20,202 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 15:33:20,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 15:33:20,202 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 15:33:20,203 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 15:33:20,203 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 -> false [2020-08-18 15:33:20,547 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 15:33:20,567 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 15:33:20,571 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 15:33:20,573 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 15:33:20,573 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 15:33:20,575 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label24.c [2020-08-18 15:33:20,650 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6fde2d28f/9ad9245b563a4cb1923111130e22b0ef/FLAG5ef84fa7e [2020-08-18 15:33:21,242 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 15:33:21,242 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem14_label24.c [2020-08-18 15:33:21,255 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6fde2d28f/9ad9245b563a4cb1923111130e22b0ef/FLAG5ef84fa7e [2020-08-18 15:33:21,439 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6fde2d28f/9ad9245b563a4cb1923111130e22b0ef [2020-08-18 15:33:21,448 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 15:33:21,450 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 15:33:21,451 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 15:33:21,451 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 15:33:21,455 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 15:33:21,456 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 03:33:21" (1/1) ... [2020-08-18 15:33:21,459 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@500f3ebc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:33:21, skipping insertion in model container [2020-08-18 15:33:21,460 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 03:33:21" (1/1) ... [2020-08-18 15:33:21,468 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 15:33:21,532 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 15:33:22,167 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 15:33:22,177 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 15:33:22,347 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 15:33:22,372 INFO L208 MainTranslator]: Completed translation [2020-08-18 15:33:22,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:33:22 WrapperNode [2020-08-18 15:33:22,373 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 15:33:22,374 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 15:33:22,374 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 15:33:22,374 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 15:33:22,394 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:33:22" (1/1) ... [2020-08-18 15:33:22,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:33:22" (1/1) ... [2020-08-18 15:33:22,416 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:33:22" (1/1) ... [2020-08-18 15:33:22,416 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:33:22" (1/1) ... [2020-08-18 15:33:22,479 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:33:22" (1/1) ... [2020-08-18 15:33:22,511 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:33:22" (1/1) ... [2020-08-18 15:33:22,530 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:33:22" (1/1) ... [2020-08-18 15:33:22,558 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 15:33:22,559 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 15:33:22,559 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 15:33:22,560 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 15:33:22,563 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:33:22" (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 15:33:22,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 15:33:22,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 15:33:22,664 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-08-18 15:33:22,665 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 15:33:22,665 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-08-18 15:33:22,666 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 15:33:22,667 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 15:33:22,667 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-18 15:33:22,668 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 15:33:22,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 15:33:22,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 15:33:24,339 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 15:33:24,340 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 15:33:24,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 03:33:24 BoogieIcfgContainer [2020-08-18 15:33:24,347 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 15:33:24,349 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 15:33:24,349 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 15:33:24,353 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 15:33:24,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 03:33:21" (1/3) ... [2020-08-18 15:33:24,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@459d03c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 03:33:24, skipping insertion in model container [2020-08-18 15:33:24,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:33:22" (2/3) ... [2020-08-18 15:33:24,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@459d03c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 03:33:24, skipping insertion in model container [2020-08-18 15:33:24,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 03:33:24" (3/3) ... [2020-08-18 15:33:24,357 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label24.c [2020-08-18 15:33:24,369 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 15:33:24,378 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 15:33:24,396 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 15:33:24,425 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 15:33:24,425 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 15:33:24,425 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 15:33:24,426 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 15:33:24,426 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 15:33:24,426 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 15:33:24,426 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 15:33:24,427 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 15:33:24,453 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2020-08-18 15:33:24,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-18 15:33:24,463 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:33:24,464 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:33:24,464 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:33:24,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:33:24,472 INFO L82 PathProgramCache]: Analyzing trace with hash 2116109586, now seen corresponding path program 1 times [2020-08-18 15:33:24,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:33:24,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294965742] [2020-08-18 15:33:24,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:33:24,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:24,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:33:24,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:24,901 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 15:33:24,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294965742] [2020-08-18 15:33:24,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:33:24,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 15:33:24,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164925798] [2020-08-18 15:33:24,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 15:33:24,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:33:24,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 15:33:24,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 15:33:24,932 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2020-08-18 15:33:27,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:33:27,894 INFO L93 Difference]: Finished difference Result 886 states and 1613 transitions. [2020-08-18 15:33:27,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 15:33:27,897 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2020-08-18 15:33:27,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:33:27,942 INFO L225 Difference]: With dead ends: 886 [2020-08-18 15:33:27,942 INFO L226 Difference]: Without dead ends: 564 [2020-08-18 15:33:27,957 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 15:33:27,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-08-18 15:33:28,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 558. [2020-08-18 15:33:28,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2020-08-18 15:33:28,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 906 transitions. [2020-08-18 15:33:28,120 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 906 transitions. Word has length 47 [2020-08-18 15:33:28,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:33:28,120 INFO L479 AbstractCegarLoop]: Abstraction has 558 states and 906 transitions. [2020-08-18 15:33:28,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 15:33:28,121 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 906 transitions. [2020-08-18 15:33:28,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-18 15:33:28,127 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:33:28,127 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:33:28,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 15:33:28,128 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:33:28,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:33:28,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1939521290, now seen corresponding path program 1 times [2020-08-18 15:33:28,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:33:28,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1100997918] [2020-08-18 15:33:28,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:33:28,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:28,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:33:28,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:28,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 15:33:28,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:28,396 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:33:28,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1100997918] [2020-08-18 15:33:28,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:33:28,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 15:33:28,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835549458] [2020-08-18 15:33:28,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 15:33:28,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:33:28,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 15:33:28,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-18 15:33:28,400 INFO L87 Difference]: Start difference. First operand 558 states and 906 transitions. Second operand 8 states. [2020-08-18 15:33:30,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:33:30,342 INFO L93 Difference]: Finished difference Result 1320 states and 2174 transitions. [2020-08-18 15:33:30,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 15:33:30,342 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 121 [2020-08-18 15:33:30,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:33:30,349 INFO L225 Difference]: With dead ends: 1320 [2020-08-18 15:33:30,349 INFO L226 Difference]: Without dead ends: 768 [2020-08-18 15:33:30,352 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 15:33:30,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2020-08-18 15:33:30,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 566. [2020-08-18 15:33:30,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566 states. [2020-08-18 15:33:30,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 819 transitions. [2020-08-18 15:33:30,383 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 819 transitions. Word has length 121 [2020-08-18 15:33:30,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:33:30,383 INFO L479 AbstractCegarLoop]: Abstraction has 566 states and 819 transitions. [2020-08-18 15:33:30,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 15:33:30,384 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 819 transitions. [2020-08-18 15:33:30,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-08-18 15:33:30,386 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:33:30,387 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:33:30,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 15:33:30,387 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:33:30,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:33:30,388 INFO L82 PathProgramCache]: Analyzing trace with hash -2114473467, now seen corresponding path program 1 times [2020-08-18 15:33:30,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:33:30,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [565235854] [2020-08-18 15:33:30,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:33:30,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:30,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:33:30,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:30,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 15:33:30,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:30,786 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:33:30,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [565235854] [2020-08-18 15:33:30,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:33:30,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 15:33:30,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956779786] [2020-08-18 15:33:30,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 15:33:30,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:33:30,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 15:33:30,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-18 15:33:30,794 INFO L87 Difference]: Start difference. First operand 566 states and 819 transitions. Second operand 8 states. [2020-08-18 15:33:32,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:33:32,754 INFO L93 Difference]: Finished difference Result 1330 states and 1917 transitions. [2020-08-18 15:33:32,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 15:33:32,756 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 130 [2020-08-18 15:33:32,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:33:32,767 INFO L225 Difference]: With dead ends: 1330 [2020-08-18 15:33:32,767 INFO L226 Difference]: Without dead ends: 770 [2020-08-18 15:33:32,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-08-18 15:33:32,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2020-08-18 15:33:32,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 754. [2020-08-18 15:33:32,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 754 states. [2020-08-18 15:33:32,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1023 transitions. [2020-08-18 15:33:32,815 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1023 transitions. Word has length 130 [2020-08-18 15:33:32,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:33:32,818 INFO L479 AbstractCegarLoop]: Abstraction has 754 states and 1023 transitions. [2020-08-18 15:33:32,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 15:33:32,818 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1023 transitions. [2020-08-18 15:33:32,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-08-18 15:33:32,830 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:33:32,830 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:33:32,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 15:33:32,832 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:33:32,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:33:32,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1539058259, now seen corresponding path program 1 times [2020-08-18 15:33:32,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:33:32,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [741122903] [2020-08-18 15:33:32,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:33:32,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:33,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:33:33,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:33,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 15:33:33,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:33,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-18 15:33:33,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:33,161 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 81 proven. 2 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-08-18 15:33:33,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [741122903] [2020-08-18 15:33:33,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:33:33,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 15:33:33,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845512145] [2020-08-18 15:33:33,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 15:33:33,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:33:33,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 15:33:33,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 15:33:33,164 INFO L87 Difference]: Start difference. First operand 754 states and 1023 transitions. Second operand 5 states. [2020-08-18 15:33:35,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:33:35,016 INFO L93 Difference]: Finished difference Result 2246 states and 3090 transitions. [2020-08-18 15:33:35,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 15:33:35,016 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 214 [2020-08-18 15:33:35,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:33:35,026 INFO L225 Difference]: With dead ends: 2246 [2020-08-18 15:33:35,026 INFO L226 Difference]: Without dead ends: 1498 [2020-08-18 15:33:35,029 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-08-18 15:33:35,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2020-08-18 15:33:35,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 1310. [2020-08-18 15:33:35,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1310 states. [2020-08-18 15:33:35,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 1681 transitions. [2020-08-18 15:33:35,075 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 1681 transitions. Word has length 214 [2020-08-18 15:33:35,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:33:35,077 INFO L479 AbstractCegarLoop]: Abstraction has 1310 states and 1681 transitions. [2020-08-18 15:33:35,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 15:33:35,077 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 1681 transitions. [2020-08-18 15:33:35,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-08-18 15:33:35,084 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:33:35,084 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:33:35,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 15:33:35,085 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:33:35,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:33:35,085 INFO L82 PathProgramCache]: Analyzing trace with hash -266552290, now seen corresponding path program 1 times [2020-08-18 15:33:35,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:33:35,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164195602] [2020-08-18 15:33:35,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:33:35,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:35,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:33:35,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:35,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 15:33:35,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:35,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-18 15:33:35,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:35,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-08-18 15:33:35,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:35,982 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 154 proven. 191 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-18 15:33:35,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164195602] [2020-08-18 15:33:35,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:33:35,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 15:33:35,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290966893] [2020-08-18 15:33:35,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 15:33:35,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:33:35,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 15:33:35,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-18 15:33:35,985 INFO L87 Difference]: Start difference. First operand 1310 states and 1681 transitions. Second operand 9 states. [2020-08-18 15:33:38,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:33:38,906 INFO L93 Difference]: Finished difference Result 3081 states and 3988 transitions. [2020-08-18 15:33:38,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 15:33:38,907 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 317 [2020-08-18 15:33:38,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:33:38,917 INFO L225 Difference]: With dead ends: 3081 [2020-08-18 15:33:38,918 INFO L226 Difference]: Without dead ends: 1734 [2020-08-18 15:33:38,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-08-18 15:33:38,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2020-08-18 15:33:38,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1690. [2020-08-18 15:33:38,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1690 states. [2020-08-18 15:33:38,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 1966 transitions. [2020-08-18 15:33:38,981 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 1966 transitions. Word has length 317 [2020-08-18 15:33:38,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:33:38,982 INFO L479 AbstractCegarLoop]: Abstraction has 1690 states and 1966 transitions. [2020-08-18 15:33:38,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 15:33:38,982 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 1966 transitions. [2020-08-18 15:33:38,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-08-18 15:33:38,990 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:33:38,990 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:33:38,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 15:33:38,991 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:33:38,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:33:38,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1074149043, now seen corresponding path program 1 times [2020-08-18 15:33:38,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:33:38,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1531543533] [2020-08-18 15:33:38,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:33:39,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:39,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:33:39,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:39,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 15:33:39,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:39,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-18 15:33:39,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:39,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2020-08-18 15:33:39,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:39,858 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 267 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-08-18 15:33:39,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1531543533] [2020-08-18 15:33:39,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:33:39,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 15:33:39,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763146461] [2020-08-18 15:33:39,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 15:33:39,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:33:39,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 15:33:39,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-18 15:33:39,872 INFO L87 Difference]: Start difference. First operand 1690 states and 1966 transitions. Second operand 8 states. [2020-08-18 15:33:41,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:33:41,965 INFO L93 Difference]: Finished difference Result 3607 states and 4282 transitions. [2020-08-18 15:33:41,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 15:33:41,966 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 342 [2020-08-18 15:33:41,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:33:41,977 INFO L225 Difference]: With dead ends: 3607 [2020-08-18 15:33:41,977 INFO L226 Difference]: Without dead ends: 1923 [2020-08-18 15:33:41,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-08-18 15:33:41,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2020-08-18 15:33:42,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 1882. [2020-08-18 15:33:42,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1882 states. [2020-08-18 15:33:42,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 2178 transitions. [2020-08-18 15:33:42,043 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 2178 transitions. Word has length 342 [2020-08-18 15:33:42,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:33:42,044 INFO L479 AbstractCegarLoop]: Abstraction has 1882 states and 2178 transitions. [2020-08-18 15:33:42,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 15:33:42,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 2178 transitions. [2020-08-18 15:33:42,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2020-08-18 15:33:42,051 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:33:42,052 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:33:42,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 15:33:42,052 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:33:42,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:33:42,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1716498031, now seen corresponding path program 1 times [2020-08-18 15:33:42,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:33:42,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [75228192] [2020-08-18 15:33:42,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:33:42,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:42,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:33:42,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:42,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 15:33:42,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:42,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-18 15:33:42,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:42,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2020-08-18 15:33:42,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:42,538 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 187 proven. 120 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-08-18 15:33:42,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [75228192] [2020-08-18 15:33:42,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:33:42,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 15:33:42,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527452745] [2020-08-18 15:33:42,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 15:33:42,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:33:42,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 15:33:42,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-18 15:33:42,541 INFO L87 Difference]: Start difference. First operand 1882 states and 2178 transitions. Second operand 9 states. [2020-08-18 15:33:45,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:33:45,952 INFO L93 Difference]: Finished difference Result 5807 states and 7053 transitions. [2020-08-18 15:33:45,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-18 15:33:45,954 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 360 [2020-08-18 15:33:45,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:33:45,972 INFO L225 Difference]: With dead ends: 5807 [2020-08-18 15:33:45,973 INFO L226 Difference]: Without dead ends: 3550 [2020-08-18 15:33:45,980 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-08-18 15:33:45,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2020-08-18 15:33:46,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 3178. [2020-08-18 15:33:46,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3178 states. [2020-08-18 15:33:46,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 3721 transitions. [2020-08-18 15:33:46,075 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 3721 transitions. Word has length 360 [2020-08-18 15:33:46,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:33:46,075 INFO L479 AbstractCegarLoop]: Abstraction has 3178 states and 3721 transitions. [2020-08-18 15:33:46,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 15:33:46,076 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 3721 transitions. [2020-08-18 15:33:46,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 610 [2020-08-18 15:33:46,096 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:33:46,096 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:33:46,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 15:33:46,097 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:33:46,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:33:46,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1968726846, now seen corresponding path program 1 times [2020-08-18 15:33:46,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:33:46,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1176184728] [2020-08-18 15:33:46,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:33:46,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:46,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:33:46,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:46,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 15:33:46,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:46,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 15:33:46,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:46,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 15:33:46,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:46,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 311 [2020-08-18 15:33:46,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:46,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 490 [2020-08-18 15:33:46,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:46,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1100 backedges. 516 proven. 79 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2020-08-18 15:33:46,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1176184728] [2020-08-18 15:33:46,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:33:46,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 15:33:46,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674704517] [2020-08-18 15:33:46,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 15:33:46,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:33:46,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 15:33:46,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 15:33:46,838 INFO L87 Difference]: Start difference. First operand 3178 states and 3721 transitions. Second operand 7 states. [2020-08-18 15:33:48,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:33:48,381 INFO L93 Difference]: Finished difference Result 6928 states and 8232 transitions. [2020-08-18 15:33:48,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 15:33:48,381 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 609 [2020-08-18 15:33:48,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:33:48,400 INFO L225 Difference]: With dead ends: 6928 [2020-08-18 15:33:48,401 INFO L226 Difference]: Without dead ends: 3938 [2020-08-18 15:33:48,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-08-18 15:33:48,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3938 states. [2020-08-18 15:33:48,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3938 to 3738. [2020-08-18 15:33:48,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3738 states. [2020-08-18 15:33:48,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3738 states to 3738 states and 4393 transitions. [2020-08-18 15:33:48,517 INFO L78 Accepts]: Start accepts. Automaton has 3738 states and 4393 transitions. Word has length 609 [2020-08-18 15:33:48,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:33:48,519 INFO L479 AbstractCegarLoop]: Abstraction has 3738 states and 4393 transitions. [2020-08-18 15:33:48,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 15:33:48,519 INFO L276 IsEmpty]: Start isEmpty. Operand 3738 states and 4393 transitions. [2020-08-18 15:33:48,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 643 [2020-08-18 15:33:48,538 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:33:48,539 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:33:48,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 15:33:48,540 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:33:48,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:33:48,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1522525447, now seen corresponding path program 1 times [2020-08-18 15:33:48,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:33:48,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077766826] [2020-08-18 15:33:48,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:33:48,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:48,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:33:48,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:48,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 15:33:48,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:48,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 15:33:48,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:48,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 15:33:48,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:48,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-18 15:33:48,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:49,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 523 [2020-08-18 15:33:49,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:49,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1184 backedges. 549 proven. 79 refuted. 0 times theorem prover too weak. 556 trivial. 0 not checked. [2020-08-18 15:33:49,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077766826] [2020-08-18 15:33:49,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:33:49,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 15:33:49,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820303260] [2020-08-18 15:33:49,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 15:33:49,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:33:49,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 15:33:49,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 15:33:49,585 INFO L87 Difference]: Start difference. First operand 3738 states and 4393 transitions. Second operand 7 states. [2020-08-18 15:33:51,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:33:51,279 INFO L93 Difference]: Finished difference Result 8034 states and 9576 transitions. [2020-08-18 15:33:51,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 15:33:51,286 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 642 [2020-08-18 15:33:51,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:33:51,307 INFO L225 Difference]: With dead ends: 8034 [2020-08-18 15:33:51,308 INFO L226 Difference]: Without dead ends: 4484 [2020-08-18 15:33:51,316 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-08-18 15:33:51,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4484 states. [2020-08-18 15:33:51,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4484 to 4472. [2020-08-18 15:33:51,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4472 states. [2020-08-18 15:33:51,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4472 states to 4472 states and 5249 transitions. [2020-08-18 15:33:51,429 INFO L78 Accepts]: Start accepts. Automaton has 4472 states and 5249 transitions. Word has length 642 [2020-08-18 15:33:51,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:33:51,431 INFO L479 AbstractCegarLoop]: Abstraction has 4472 states and 5249 transitions. [2020-08-18 15:33:51,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 15:33:51,431 INFO L276 IsEmpty]: Start isEmpty. Operand 4472 states and 5249 transitions. [2020-08-18 15:33:51,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 780 [2020-08-18 15:33:51,447 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:33:51,448 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:33:51,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 15:33:51,448 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:33:51,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:33:51,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1863793902, now seen corresponding path program 1 times [2020-08-18 15:33:51,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:33:51,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [681698357] [2020-08-18 15:33:51,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:33:51,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:51,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:33:51,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:51,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 15:33:51,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:51,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 15:33:51,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:51,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 15:33:51,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:51,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 311 [2020-08-18 15:33:51,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:51,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 441 [2020-08-18 15:33:51,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:51,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 520 [2020-08-18 15:33:52,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:52,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 660 [2020-08-18 15:33:52,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:53,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2167 backedges. 622 proven. 298 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2020-08-18 15:33:53,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [681698357] [2020-08-18 15:33:53,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:33:53,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 15:33:53,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093383843] [2020-08-18 15:33:53,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 15:33:53,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:33:53,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 15:33:53,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-18 15:33:53,115 INFO L87 Difference]: Start difference. First operand 4472 states and 5249 transitions. Second operand 7 states. [2020-08-18 15:33:54,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:33:54,936 INFO L93 Difference]: Finished difference Result 8817 states and 10383 transitions. [2020-08-18 15:33:54,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 15:33:54,937 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 779 [2020-08-18 15:33:54,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:33:54,955 INFO L225 Difference]: With dead ends: 8817 [2020-08-18 15:33:54,955 INFO L226 Difference]: Without dead ends: 4494 [2020-08-18 15:33:54,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-08-18 15:33:54,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4494 states. [2020-08-18 15:33:55,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4494 to 4464. [2020-08-18 15:33:55,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4464 states. [2020-08-18 15:33:55,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4464 states to 4464 states and 5013 transitions. [2020-08-18 15:33:55,068 INFO L78 Accepts]: Start accepts. Automaton has 4464 states and 5013 transitions. Word has length 779 [2020-08-18 15:33:55,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:33:55,069 INFO L479 AbstractCegarLoop]: Abstraction has 4464 states and 5013 transitions. [2020-08-18 15:33:55,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 15:33:55,069 INFO L276 IsEmpty]: Start isEmpty. Operand 4464 states and 5013 transitions. [2020-08-18 15:33:55,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 802 [2020-08-18 15:33:55,087 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:33:55,088 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:33:55,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 15:33:55,089 INFO L427 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:33:55,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:33:55,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1487204346, now seen corresponding path program 1 times [2020-08-18 15:33:55,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:33:55,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1916928358] [2020-08-18 15:33:55,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:33:55,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:55,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:33:55,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:55,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 15:33:55,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:55,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 15:33:55,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:55,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 15:33:55,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:55,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-18 15:33:55,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:55,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-08-18 15:33:55,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:55,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 682 [2020-08-18 15:33:55,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:56,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1799 backedges. 754 proven. 79 refuted. 0 times theorem prover too weak. 966 trivial. 0 not checked. [2020-08-18 15:33:56,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1916928358] [2020-08-18 15:33:56,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:33:56,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 15:33:56,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809615548] [2020-08-18 15:33:56,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 15:33:56,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:33:56,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 15:33:56,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 15:33:56,136 INFO L87 Difference]: Start difference. First operand 4464 states and 5013 transitions. Second operand 7 states. [2020-08-18 15:33:57,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:33:57,647 INFO L93 Difference]: Finished difference Result 9674 states and 10960 transitions. [2020-08-18 15:33:57,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 15:33:57,647 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 801 [2020-08-18 15:33:57,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:33:57,684 INFO L225 Difference]: With dead ends: 9674 [2020-08-18 15:33:57,685 INFO L226 Difference]: Without dead ends: 5398 [2020-08-18 15:33:57,694 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-08-18 15:33:57,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5398 states. [2020-08-18 15:33:57,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5398 to 5206. [2020-08-18 15:33:57,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5206 states. [2020-08-18 15:33:57,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5206 states to 5206 states and 5890 transitions. [2020-08-18 15:33:57,810 INFO L78 Accepts]: Start accepts. Automaton has 5206 states and 5890 transitions. Word has length 801 [2020-08-18 15:33:57,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:33:57,811 INFO L479 AbstractCegarLoop]: Abstraction has 5206 states and 5890 transitions. [2020-08-18 15:33:57,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 15:33:57,811 INFO L276 IsEmpty]: Start isEmpty. Operand 5206 states and 5890 transitions. [2020-08-18 15:33:57,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 806 [2020-08-18 15:33:57,828 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:33:57,829 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:33:57,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 15:33:57,829 INFO L427 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:33:57,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:33:57,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1595152538, now seen corresponding path program 1 times [2020-08-18 15:33:57,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:33:57,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [590895723] [2020-08-18 15:33:57,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:33:57,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:58,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:33:58,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:58,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 15:33:58,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:58,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 15:33:58,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:58,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 15:33:58,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:58,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 337 [2020-08-18 15:33:58,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:58,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 467 [2020-08-18 15:33:58,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:58,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 546 [2020-08-18 15:33:58,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:58,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 686 [2020-08-18 15:33:58,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:33:59,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2270 backedges. 648 proven. 298 refuted. 0 times theorem prover too weak. 1324 trivial. 0 not checked. [2020-08-18 15:33:59,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [590895723] [2020-08-18 15:33:59,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:33:59,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 15:33:59,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737918456] [2020-08-18 15:33:59,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 15:33:59,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:33:59,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 15:33:59,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-18 15:33:59,068 INFO L87 Difference]: Start difference. First operand 5206 states and 5890 transitions. Second operand 9 states. [2020-08-18 15:34:01,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:34:01,771 INFO L93 Difference]: Finished difference Result 11142 states and 12646 transitions. [2020-08-18 15:34:01,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 15:34:01,772 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 805 [2020-08-18 15:34:01,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:34:01,790 INFO L225 Difference]: With dead ends: 11142 [2020-08-18 15:34:01,791 INFO L226 Difference]: Without dead ends: 6124 [2020-08-18 15:34:01,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2020-08-18 15:34:01,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6124 states. [2020-08-18 15:34:01,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6124 to 5754. [2020-08-18 15:34:01,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5754 states. [2020-08-18 15:34:01,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5754 states to 5754 states and 6492 transitions. [2020-08-18 15:34:01,921 INFO L78 Accepts]: Start accepts. Automaton has 5754 states and 6492 transitions. Word has length 805 [2020-08-18 15:34:01,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:34:01,922 INFO L479 AbstractCegarLoop]: Abstraction has 5754 states and 6492 transitions. [2020-08-18 15:34:01,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 15:34:01,922 INFO L276 IsEmpty]: Start isEmpty. Operand 5754 states and 6492 transitions. [2020-08-18 15:34:01,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 849 [2020-08-18 15:34:01,942 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:34:01,943 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:34:01,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 15:34:01,944 INFO L427 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:34:01,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:34:01,944 INFO L82 PathProgramCache]: Analyzing trace with hash -322323375, now seen corresponding path program 1 times [2020-08-18 15:34:01,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:34:01,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26270424] [2020-08-18 15:34:01,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:34:02,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:34:02,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:34:02,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:34:02,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 15:34:02,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:34:02,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 15:34:02,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:34:02,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 15:34:02,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:34:02,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-18 15:34:02,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:34:02,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 477 [2020-08-18 15:34:02,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:34:02,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 550 [2020-08-18 15:34:02,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:34:02,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 729 [2020-08-18 15:34:02,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:34:03,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 655 proven. 295 refuted. 0 times theorem prover too weak. 1301 trivial. 0 not checked. [2020-08-18 15:34:03,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26270424] [2020-08-18 15:34:03,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:34:03,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 15:34:03,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424944590] [2020-08-18 15:34:03,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 15:34:03,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:34:03,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 15:34:03,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-18 15:34:03,308 INFO L87 Difference]: Start difference. First operand 5754 states and 6492 transitions. Second operand 10 states. [2020-08-18 15:34:06,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:34:06,845 INFO L93 Difference]: Finished difference Result 11324 states and 12797 transitions. [2020-08-18 15:34:06,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 15:34:06,846 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 848 [2020-08-18 15:34:06,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:34:06,861 INFO L225 Difference]: With dead ends: 11324 [2020-08-18 15:34:06,861 INFO L226 Difference]: Without dead ends: 5758 [2020-08-18 15:34:06,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2020-08-18 15:34:06,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5758 states. [2020-08-18 15:34:06,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5758 to 5756. [2020-08-18 15:34:06,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5756 states. [2020-08-18 15:34:06,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5756 states to 5756 states and 6481 transitions. [2020-08-18 15:34:06,993 INFO L78 Accepts]: Start accepts. Automaton has 5756 states and 6481 transitions. Word has length 848 [2020-08-18 15:34:06,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:34:06,994 INFO L479 AbstractCegarLoop]: Abstraction has 5756 states and 6481 transitions. [2020-08-18 15:34:06,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 15:34:06,994 INFO L276 IsEmpty]: Start isEmpty. Operand 5756 states and 6481 transitions. [2020-08-18 15:34:07,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 878 [2020-08-18 15:34:07,019 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:34:07,020 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:34:07,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 15:34:07,020 INFO L427 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:34:07,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:34:07,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1192494146, now seen corresponding path program 1 times [2020-08-18 15:34:07,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:34:07,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [583444871] [2020-08-18 15:34:07,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:34:07,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:34:07,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:34:07,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:34:07,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 15:34:07,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:34:07,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 15:34:07,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:34:07,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 15:34:07,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:34:07,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-18 15:34:07,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:34:07,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-08-18 15:34:07,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:34:07,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 579 [2020-08-18 15:34:07,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:34:07,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 758 [2020-08-18 15:34:07,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:34:08,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2295 backedges. 616 proven. 160 refuted. 0 times theorem prover too weak. 1519 trivial. 0 not checked. [2020-08-18 15:34:08,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [583444871] [2020-08-18 15:34:08,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:34:08,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 15:34:08,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116780745] [2020-08-18 15:34:08,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 15:34:08,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:34:08,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 15:34:08,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-18 15:34:08,060 INFO L87 Difference]: Start difference. First operand 5756 states and 6481 transitions. Second operand 9 states. [2020-08-18 15:34:11,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:34:11,263 INFO L93 Difference]: Finished difference Result 13170 states and 14921 transitions. [2020-08-18 15:34:11,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-18 15:34:11,264 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 877 [2020-08-18 15:34:11,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:34:11,284 INFO L225 Difference]: With dead ends: 13170 [2020-08-18 15:34:11,284 INFO L226 Difference]: Without dead ends: 7602 [2020-08-18 15:34:11,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2020-08-18 15:34:11,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7602 states. [2020-08-18 15:34:11,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7602 to 7416. [2020-08-18 15:34:11,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7416 states. [2020-08-18 15:34:11,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7416 states to 7416 states and 8323 transitions. [2020-08-18 15:34:11,447 INFO L78 Accepts]: Start accepts. Automaton has 7416 states and 8323 transitions. Word has length 877 [2020-08-18 15:34:11,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:34:11,448 INFO L479 AbstractCegarLoop]: Abstraction has 7416 states and 8323 transitions. [2020-08-18 15:34:11,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 15:34:11,449 INFO L276 IsEmpty]: Start isEmpty. Operand 7416 states and 8323 transitions. [2020-08-18 15:34:11,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1112 [2020-08-18 15:34:11,486 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:34:11,487 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:34:11,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 15:34:11,487 INFO L427 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:34:11,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:34:11,488 INFO L82 PathProgramCache]: Analyzing trace with hash -488991978, now seen corresponding path program 1 times [2020-08-18 15:34:11,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:34:11,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786050677] [2020-08-18 15:34:11,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:34:11,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:34:11,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:34:11,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:34:11,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 15:34:11,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:34:11,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 15:34:11,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:34:11,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 15:34:11,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:34:11,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-18 15:34:11,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:34:11,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 425 [2020-08-18 15:34:11,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:34:11,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 558 [2020-08-18 15:34:11,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:34:12,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 631 [2020-08-18 15:34:12,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:34:12,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 810 [2020-08-18 15:34:12,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:34:12,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 992 [2020-08-18 15:34:12,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:34:12,867 INFO L134 CoverageAnalysis]: Checked inductivity of 3771 backedges. 1325 proven. 395 refuted. 0 times theorem prover too weak. 2051 trivial. 0 not checked. [2020-08-18 15:34:12,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1786050677] [2020-08-18 15:34:12,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:34:12,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 15:34:12,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39557438] [2020-08-18 15:34:12,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 15:34:12,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:34:12,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 15:34:12,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-18 15:34:12,870 INFO L87 Difference]: Start difference. First operand 7416 states and 8323 transitions. Second operand 9 states. [2020-08-18 15:34:15,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:34:15,789 INFO L93 Difference]: Finished difference Result 17064 states and 19350 transitions. [2020-08-18 15:34:15,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-18 15:34:15,790 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1111 [2020-08-18 15:34:15,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:34:15,833 INFO L225 Difference]: With dead ends: 17064 [2020-08-18 15:34:15,834 INFO L226 Difference]: Without dead ends: 9836 [2020-08-18 15:34:15,851 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2020-08-18 15:34:15,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9836 states. [2020-08-18 15:34:16,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9836 to 8722. [2020-08-18 15:34:16,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8722 states. [2020-08-18 15:34:16,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8722 states to 8722 states and 9968 transitions. [2020-08-18 15:34:16,039 INFO L78 Accepts]: Start accepts. Automaton has 8722 states and 9968 transitions. Word has length 1111 [2020-08-18 15:34:16,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:34:16,040 INFO L479 AbstractCegarLoop]: Abstraction has 8722 states and 9968 transitions. [2020-08-18 15:34:16,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 15:34:16,040 INFO L276 IsEmpty]: Start isEmpty. Operand 8722 states and 9968 transitions. [2020-08-18 15:34:16,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1149 [2020-08-18 15:34:16,075 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:34:16,076 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 8, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 15:34:16,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 15:34:16,077 INFO L427 AbstractCegarLoop]: === Iteration 16 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:34:16,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:34:16,077 INFO L82 PathProgramCache]: Analyzing trace with hash 166705873, now seen corresponding path program 1 times [2020-08-18 15:34:16,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:34:16,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076529706] [2020-08-18 15:34:16,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:34:16,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:34:16,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:34:16,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:34:16,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 15:34:16,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:34:16,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 15:34:16,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:34:16,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 15:34:16,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:34:16,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-18 15:34:16,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:34:16,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 425 [2020-08-18 15:34:16,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:34:16,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 498 [2020-08-18 15:34:16,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:34:16,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 628 [2020-08-18 15:34:16,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:34:16,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 707 [2020-08-18 15:34:16,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:34:16,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 847