/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST -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 12:13:24,268 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-18 12:13:24,338 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 12:13:24,340 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 12:13:24,343 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 12:13:24,344 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 12:13:24,346 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 12:13:24,348 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 12:13:24,349 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 12:13:24,357 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 12:13:24,359 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 12:13:24,360 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 12:13:24,361 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 12:13:24,362 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 12:13:24,375 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 12:13:24,392 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 12:13:24,393 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 12:13:24,394 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 12:13:24,395 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 12:13:24,435 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 12:13:24,435 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 12:13:24,436 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 12:13:24,436 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 12:13:24,437 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 12:13:24,437 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 12:13:24,437 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 12:13:24,437 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 12:13:24,438 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 12:13:24,438 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 12:13:24,438 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 12:13:24,438 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 12:13:24,438 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 12:13:24,438 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 12:13:24,439 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 12:13:24,439 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 12:13:24,439 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 12:13:24,439 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 12:13:24,439 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 12:13:24,440 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 12:13:24,440 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 12:13:24,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 12:13:24,440 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 12:13:24,440 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 12:13:24,441 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 12:13:24,441 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 12:13:24,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 12:13:24,441 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 12:13:24,441 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 12:13:24,442 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; [2020-08-18 12:13:24,753 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 12:13:24,775 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 12:13:24,785 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 12:13:24,787 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 12:13:24,788 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 12:13:24,789 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label24.c [2020-08-18 12:13:24,879 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/be2b24273/0b7322696a9b4333a01f3f913d7a3e3b/FLAGc238b838a [2020-08-18 12:13:25,480 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 12:13:25,482 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem14_label24.c [2020-08-18 12:13:25,501 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/be2b24273/0b7322696a9b4333a01f3f913d7a3e3b/FLAGc238b838a [2020-08-18 12:13:25,783 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/be2b24273/0b7322696a9b4333a01f3f913d7a3e3b [2020-08-18 12:13:25,793 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 12:13:25,794 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 12:13:25,797 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 12:13:25,797 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 12:13:25,801 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 12:13:25,803 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 12:13:25" (1/1) ... [2020-08-18 12:13:25,806 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1abca0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:13:25, skipping insertion in model container [2020-08-18 12:13:25,806 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 12:13:25" (1/1) ... [2020-08-18 12:13:25,816 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 12:13:25,885 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 12:13:26,519 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 12:13:26,524 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 12:13:26,688 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 12:13:26,711 INFO L208 MainTranslator]: Completed translation [2020-08-18 12:13:26,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:13:26 WrapperNode [2020-08-18 12:13:26,712 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 12:13:26,713 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 12:13:26,713 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 12:13:26,713 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 12:13:26,733 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:13:26" (1/1) ... [2020-08-18 12:13:26,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:13:26" (1/1) ... [2020-08-18 12:13:26,778 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:13:26" (1/1) ... [2020-08-18 12:13:26,778 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:13:26" (1/1) ... [2020-08-18 12:13:26,838 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:13:26" (1/1) ... [2020-08-18 12:13:26,851 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:13:26" (1/1) ... [2020-08-18 12:13:26,859 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:13:26" (1/1) ... [2020-08-18 12:13:26,869 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 12:13:26,870 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 12:13:26,870 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 12:13:26,871 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 12:13:26,872 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:13:26" (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 12:13:26,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 12:13:26,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 12:13:26,968 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-08-18 12:13:26,969 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 12:13:26,970 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-08-18 12:13:26,970 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 12:13:26,970 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 12:13:26,971 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-18 12:13:26,971 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 12:13:26,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 12:13:26,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 12:13:28,706 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 12:13:28,707 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 12:13:28,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 12:13:28 BoogieIcfgContainer [2020-08-18 12:13:28,714 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 12:13:28,716 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 12:13:28,716 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 12:13:28,719 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 12:13:28,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 12:13:25" (1/3) ... [2020-08-18 12:13:28,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@142b2901 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 12:13:28, skipping insertion in model container [2020-08-18 12:13:28,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:13:26" (2/3) ... [2020-08-18 12:13:28,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@142b2901 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 12:13:28, skipping insertion in model container [2020-08-18 12:13:28,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 12:13:28" (3/3) ... [2020-08-18 12:13:28,724 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label24.c [2020-08-18 12:13:28,737 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 12:13:28,747 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 12:13:28,764 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 12:13:28,794 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 12:13:28,794 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 12:13:28,794 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 12:13:28,795 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 12:13:28,795 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 12:13:28,795 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 12:13:28,795 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 12:13:28,795 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 12:13:28,824 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2020-08-18 12:13:28,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-18 12:13:28,834 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:13:28,835 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 12:13:28,836 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:13:28,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:13:28,843 INFO L82 PathProgramCache]: Analyzing trace with hash 2116109586, now seen corresponding path program 1 times [2020-08-18 12:13:28,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:13:28,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [805733844] [2020-08-18 12:13:28,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:13:29,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:13:29,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:13:29,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:13:29,311 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 12:13:29,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [805733844] [2020-08-18 12:13:29,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:13:29,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 12:13:29,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440374650] [2020-08-18 12:13:29,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 12:13:29,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:13:29,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 12:13:29,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 12:13:29,349 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2020-08-18 12:13:32,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:13:32,521 INFO L93 Difference]: Finished difference Result 886 states and 1613 transitions. [2020-08-18 12:13:32,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 12:13:32,524 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2020-08-18 12:13:32,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:13:32,544 INFO L225 Difference]: With dead ends: 886 [2020-08-18 12:13:32,545 INFO L226 Difference]: Without dead ends: 564 [2020-08-18 12:13:32,553 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 12:13:32,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-08-18 12:13:32,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 558. [2020-08-18 12:13:32,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2020-08-18 12:13:32,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 906 transitions. [2020-08-18 12:13:32,646 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 906 transitions. Word has length 47 [2020-08-18 12:13:32,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:13:32,647 INFO L479 AbstractCegarLoop]: Abstraction has 558 states and 906 transitions. [2020-08-18 12:13:32,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 12:13:32,647 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 906 transitions. [2020-08-18 12:13:32,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-18 12:13:32,654 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:13:32,654 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 12:13:32,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 12:13:32,655 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:13:32,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:13:32,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1939521290, now seen corresponding path program 1 times [2020-08-18 12:13:32,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:13:32,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1022875851] [2020-08-18 12:13:32,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:13:32,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:13:32,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:13:32,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:13:32,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 12:13:32,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:13:32,976 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 12:13:32,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1022875851] [2020-08-18 12:13:32,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:13:32,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 12:13:32,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82931604] [2020-08-18 12:13:32,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 12:13:32,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:13:32,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 12:13:32,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-18 12:13:32,981 INFO L87 Difference]: Start difference. First operand 558 states and 906 transitions. Second operand 8 states. [2020-08-18 12:13:35,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:13:35,238 INFO L93 Difference]: Finished difference Result 1320 states and 2174 transitions. [2020-08-18 12:13:35,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 12:13:35,239 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 121 [2020-08-18 12:13:35,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:13:35,246 INFO L225 Difference]: With dead ends: 1320 [2020-08-18 12:13:35,247 INFO L226 Difference]: Without dead ends: 768 [2020-08-18 12:13:35,249 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 12:13:35,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2020-08-18 12:13:35,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 566. [2020-08-18 12:13:35,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566 states. [2020-08-18 12:13:35,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 819 transitions. [2020-08-18 12:13:35,290 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 819 transitions. Word has length 121 [2020-08-18 12:13:35,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:13:35,290 INFO L479 AbstractCegarLoop]: Abstraction has 566 states and 819 transitions. [2020-08-18 12:13:35,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 12:13:35,291 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 819 transitions. [2020-08-18 12:13:35,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-08-18 12:13:35,296 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:13:35,297 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 12:13:35,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 12:13:35,297 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:13:35,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:13:35,298 INFO L82 PathProgramCache]: Analyzing trace with hash -2114473467, now seen corresponding path program 1 times [2020-08-18 12:13:35,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:13:35,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [452348755] [2020-08-18 12:13:35,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:13:35,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:13:35,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:13:35,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:13:35,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 12:13:35,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:13:35,620 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 12:13:35,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [452348755] [2020-08-18 12:13:35,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:13:35,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 12:13:35,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992366850] [2020-08-18 12:13:35,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 12:13:35,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:13:35,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 12:13:35,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-18 12:13:35,625 INFO L87 Difference]: Start difference. First operand 566 states and 819 transitions. Second operand 8 states. [2020-08-18 12:13:37,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:13:37,590 INFO L93 Difference]: Finished difference Result 1330 states and 1917 transitions. [2020-08-18 12:13:37,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 12:13:37,592 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 130 [2020-08-18 12:13:37,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:13:37,599 INFO L225 Difference]: With dead ends: 1330 [2020-08-18 12:13:37,599 INFO L226 Difference]: Without dead ends: 770 [2020-08-18 12:13:37,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-08-18 12:13:37,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2020-08-18 12:13:37,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 754. [2020-08-18 12:13:37,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 754 states. [2020-08-18 12:13:37,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1023 transitions. [2020-08-18 12:13:37,641 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1023 transitions. Word has length 130 [2020-08-18 12:13:37,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:13:37,644 INFO L479 AbstractCegarLoop]: Abstraction has 754 states and 1023 transitions. [2020-08-18 12:13:37,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 12:13:37,644 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1023 transitions. [2020-08-18 12:13:37,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-08-18 12:13:37,659 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:13:37,659 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 12:13:37,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 12:13:37,660 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:13:37,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:13:37,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1539058259, now seen corresponding path program 1 times [2020-08-18 12:13:37,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:13:37,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1580873616] [2020-08-18 12:13:37,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:13:37,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:13:37,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:13:37,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:13:37,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 12:13:37,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:13:37,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-18 12:13:37,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:13:37,942 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 12:13:37,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1580873616] [2020-08-18 12:13:37,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:13:37,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 12:13:37,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962262155] [2020-08-18 12:13:37,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 12:13:37,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:13:37,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 12:13:37,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 12:13:37,945 INFO L87 Difference]: Start difference. First operand 754 states and 1023 transitions. Second operand 5 states. [2020-08-18 12:13:40,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:13:40,012 INFO L93 Difference]: Finished difference Result 2246 states and 3090 transitions. [2020-08-18 12:13:40,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 12:13:40,014 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 214 [2020-08-18 12:13:40,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:13:40,025 INFO L225 Difference]: With dead ends: 2246 [2020-08-18 12:13:40,025 INFO L226 Difference]: Without dead ends: 1498 [2020-08-18 12:13:40,029 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 12:13:40,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2020-08-18 12:13:40,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 1310. [2020-08-18 12:13:40,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1310 states. [2020-08-18 12:13:40,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 1681 transitions. [2020-08-18 12:13:40,081 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 1681 transitions. Word has length 214 [2020-08-18 12:13:40,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:13:40,082 INFO L479 AbstractCegarLoop]: Abstraction has 1310 states and 1681 transitions. [2020-08-18 12:13:40,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 12:13:40,083 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 1681 transitions. [2020-08-18 12:13:40,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-08-18 12:13:40,089 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:13:40,089 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 12:13:40,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 12:13:40,090 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:13:40,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:13:40,090 INFO L82 PathProgramCache]: Analyzing trace with hash -266552290, now seen corresponding path program 1 times [2020-08-18 12:13:40,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:13:40,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234596666] [2020-08-18 12:13:40,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:13:40,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:13:40,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:13:40,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:13:40,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 12:13:40,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:13:40,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-18 12:13:40,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:13:40,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-08-18 12:13:40,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:13:40,855 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 12:13:40,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234596666] [2020-08-18 12:13:40,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:13:40,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 12:13:40,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075281603] [2020-08-18 12:13:40,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 12:13:40,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:13:40,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 12:13:40,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-18 12:13:40,860 INFO L87 Difference]: Start difference. First operand 1310 states and 1681 transitions. Second operand 9 states. [2020-08-18 12:13:41,744 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2020-08-18 12:13:44,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:13:44,159 INFO L93 Difference]: Finished difference Result 3081 states and 3988 transitions. [2020-08-18 12:13:44,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 12:13:44,166 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 317 [2020-08-18 12:13:44,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:13:44,176 INFO L225 Difference]: With dead ends: 3081 [2020-08-18 12:13:44,176 INFO L226 Difference]: Without dead ends: 1734 [2020-08-18 12:13:44,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-08-18 12:13:44,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2020-08-18 12:13:44,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1690. [2020-08-18 12:13:44,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1690 states. [2020-08-18 12:13:44,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 1966 transitions. [2020-08-18 12:13:44,232 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 1966 transitions. Word has length 317 [2020-08-18 12:13:44,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:13:44,232 INFO L479 AbstractCegarLoop]: Abstraction has 1690 states and 1966 transitions. [2020-08-18 12:13:44,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 12:13:44,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 1966 transitions. [2020-08-18 12:13:44,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-08-18 12:13:44,239 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:13:44,240 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 12:13:44,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 12:13:44,240 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:13:44,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:13:44,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1074149043, now seen corresponding path program 1 times [2020-08-18 12:13:44,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:13:44,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [534381081] [2020-08-18 12:13:44,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:13:44,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:13:44,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:13:44,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:13:44,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 12:13:44,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:13:44,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-18 12:13:44,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:13:44,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2020-08-18 12:13:44,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:13:45,035 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 12:13:45,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [534381081] [2020-08-18 12:13:45,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:13:45,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 12:13:45,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843658698] [2020-08-18 12:13:45,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 12:13:45,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:13:45,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 12:13:45,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-18 12:13:45,038 INFO L87 Difference]: Start difference. First operand 1690 states and 1966 transitions. Second operand 8 states. [2020-08-18 12:13:47,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:13:47,498 INFO L93 Difference]: Finished difference Result 3607 states and 4282 transitions. [2020-08-18 12:13:47,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 12:13:47,499 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 342 [2020-08-18 12:13:47,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:13:47,509 INFO L225 Difference]: With dead ends: 3607 [2020-08-18 12:13:47,510 INFO L226 Difference]: Without dead ends: 1923 [2020-08-18 12:13:47,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-08-18 12:13:47,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2020-08-18 12:13:47,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 1882. [2020-08-18 12:13:47,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1882 states. [2020-08-18 12:13:47,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 2178 transitions. [2020-08-18 12:13:47,573 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 2178 transitions. Word has length 342 [2020-08-18 12:13:47,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:13:47,573 INFO L479 AbstractCegarLoop]: Abstraction has 1882 states and 2178 transitions. [2020-08-18 12:13:47,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 12:13:47,574 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 2178 transitions. [2020-08-18 12:13:47,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2020-08-18 12:13:47,582 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:13:47,582 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 12:13:47,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 12:13:47,583 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:13:47,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:13:47,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1716498031, now seen corresponding path program 1 times [2020-08-18 12:13:47,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:13:47,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1507825410] [2020-08-18 12:13:47,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:13:47,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:13:47,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:13:47,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:13:47,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 12:13:47,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:13:47,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-18 12:13:47,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:13:47,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2020-08-18 12:13:47,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:13:48,055 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 12:13:48,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1507825410] [2020-08-18 12:13:48,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:13:48,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 12:13:48,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887096225] [2020-08-18 12:13:48,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 12:13:48,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:13:48,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 12:13:48,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-18 12:13:48,058 INFO L87 Difference]: Start difference. First operand 1882 states and 2178 transitions. Second operand 9 states. [2020-08-18 12:13:52,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:13:52,002 INFO L93 Difference]: Finished difference Result 5807 states and 7053 transitions. [2020-08-18 12:13:52,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-18 12:13:52,005 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 360 [2020-08-18 12:13:52,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:13:52,021 INFO L225 Difference]: With dead ends: 5807 [2020-08-18 12:13:52,021 INFO L226 Difference]: Without dead ends: 3550 [2020-08-18 12:13:52,028 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 12:13:52,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2020-08-18 12:13:52,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 3178. [2020-08-18 12:13:52,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3178 states. [2020-08-18 12:13:52,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 3721 transitions. [2020-08-18 12:13:52,112 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 3721 transitions. Word has length 360 [2020-08-18 12:13:52,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:13:52,113 INFO L479 AbstractCegarLoop]: Abstraction has 3178 states and 3721 transitions. [2020-08-18 12:13:52,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 12:13:52,113 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 3721 transitions. [2020-08-18 12:13:52,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 610 [2020-08-18 12:13:52,122 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:13:52,123 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 12:13:52,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 12:13:52,124 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:13:52,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:13:52,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1968726846, now seen corresponding path program 1 times [2020-08-18 12:13:52,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:13:52,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561775616] [2020-08-18 12:13:52,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:13:52,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:13:52,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:13:52,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:13:52,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 12:13:52,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:13:52,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 12:13:52,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:13:52,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 12:13:52,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:13:52,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 311 [2020-08-18 12:13:52,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:13:52,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 490 [2020-08-18 12:13:52,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:13:52,807 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 12:13:52,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561775616] [2020-08-18 12:13:52,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:13:52,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 12:13:52,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417176227] [2020-08-18 12:13:52,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 12:13:52,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:13:52,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 12:13:52,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 12:13:52,810 INFO L87 Difference]: Start difference. First operand 3178 states and 3721 transitions. Second operand 7 states. [2020-08-18 12:13:54,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:13:54,592 INFO L93 Difference]: Finished difference Result 6928 states and 8232 transitions. [2020-08-18 12:13:54,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 12:13:54,593 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 609 [2020-08-18 12:13:54,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:13:54,614 INFO L225 Difference]: With dead ends: 6928 [2020-08-18 12:13:54,614 INFO L226 Difference]: Without dead ends: 3938 [2020-08-18 12:13:54,623 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 12:13:54,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3938 states. [2020-08-18 12:13:54,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3938 to 3738. [2020-08-18 12:13:54,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3738 states. [2020-08-18 12:13:54,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3738 states to 3738 states and 4393 transitions. [2020-08-18 12:13:54,716 INFO L78 Accepts]: Start accepts. Automaton has 3738 states and 4393 transitions. Word has length 609 [2020-08-18 12:13:54,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:13:54,720 INFO L479 AbstractCegarLoop]: Abstraction has 3738 states and 4393 transitions. [2020-08-18 12:13:54,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 12:13:54,720 INFO L276 IsEmpty]: Start isEmpty. Operand 3738 states and 4393 transitions. [2020-08-18 12:13:54,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 643 [2020-08-18 12:13:54,732 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:13:54,732 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 12:13:54,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 12:13:54,733 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:13:54,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:13:54,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1522525447, now seen corresponding path program 1 times [2020-08-18 12:13:54,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:13:54,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184654715] [2020-08-18 12:13:54,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:13:54,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:13:54,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:13:54,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:13:55,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 12:13:55,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:13:55,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 12:13:55,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:13:55,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 12:13:55,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:13:55,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-18 12:13:55,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:13:55,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 523 [2020-08-18 12:13:55,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:13:55,466 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 12:13:55,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184654715] [2020-08-18 12:13:55,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:13:55,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 12:13:55,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808758059] [2020-08-18 12:13:55,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 12:13:55,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:13:55,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 12:13:55,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 12:13:55,469 INFO L87 Difference]: Start difference. First operand 3738 states and 4393 transitions. Second operand 7 states. [2020-08-18 12:13:57,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:13:57,304 INFO L93 Difference]: Finished difference Result 8034 states and 9576 transitions. [2020-08-18 12:13:57,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 12:13:57,305 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 642 [2020-08-18 12:13:57,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:13:57,323 INFO L225 Difference]: With dead ends: 8034 [2020-08-18 12:13:57,323 INFO L226 Difference]: Without dead ends: 4484 [2020-08-18 12:13:57,333 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 12:13:57,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4484 states. [2020-08-18 12:13:57,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4484 to 4472. [2020-08-18 12:13:57,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4472 states. [2020-08-18 12:13:57,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4472 states to 4472 states and 5249 transitions. [2020-08-18 12:13:57,464 INFO L78 Accepts]: Start accepts. Automaton has 4472 states and 5249 transitions. Word has length 642 [2020-08-18 12:13:57,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:13:57,466 INFO L479 AbstractCegarLoop]: Abstraction has 4472 states and 5249 transitions. [2020-08-18 12:13:57,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 12:13:57,466 INFO L276 IsEmpty]: Start isEmpty. Operand 4472 states and 5249 transitions. [2020-08-18 12:13:57,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 780 [2020-08-18 12:13:57,484 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:13:57,485 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 12:13:57,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 12:13:57,485 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:13:57,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:13:57,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1863793902, now seen corresponding path program 1 times [2020-08-18 12:13:57,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:13:57,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [259298986] [2020-08-18 12:13:57,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:13:57,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:13:57,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:13:57,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:13:57,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 12:13:57,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:13:57,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 12:13:57,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:13:57,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 12:13:57,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:13:57,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 311 [2020-08-18 12:13:57,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:13:58,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 441 [2020-08-18 12:13:58,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:13:58,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 520 [2020-08-18 12:13:58,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:13:58,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 660 [2020-08-18 12:13:58,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:13:58,842 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 12:13:58,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [259298986] [2020-08-18 12:13:58,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:13:58,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 12:13:58,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099077255] [2020-08-18 12:13:58,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 12:13:58,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:13:58,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 12:13:58,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-18 12:13:58,844 INFO L87 Difference]: Start difference. First operand 4472 states and 5249 transitions. Second operand 7 states. [2020-08-18 12:14:00,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:14:00,870 INFO L93 Difference]: Finished difference Result 8817 states and 10383 transitions. [2020-08-18 12:14:00,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 12:14:00,871 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 779 [2020-08-18 12:14:00,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:14:00,890 INFO L225 Difference]: With dead ends: 8817 [2020-08-18 12:14:00,890 INFO L226 Difference]: Without dead ends: 4494 [2020-08-18 12:14:00,902 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 12:14:00,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4494 states. [2020-08-18 12:14:00,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4494 to 4464. [2020-08-18 12:14:00,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4464 states. [2020-08-18 12:14:01,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4464 states to 4464 states and 5013 transitions. [2020-08-18 12:14:01,003 INFO L78 Accepts]: Start accepts. Automaton has 4464 states and 5013 transitions. Word has length 779 [2020-08-18 12:14:01,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:14:01,004 INFO L479 AbstractCegarLoop]: Abstraction has 4464 states and 5013 transitions. [2020-08-18 12:14:01,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 12:14:01,004 INFO L276 IsEmpty]: Start isEmpty. Operand 4464 states and 5013 transitions. [2020-08-18 12:14:01,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 802 [2020-08-18 12:14:01,020 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:14:01,021 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 12:14:01,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 12:14:01,021 INFO L427 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:14:01,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:14:01,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1487204346, now seen corresponding path program 1 times [2020-08-18 12:14:01,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:14:01,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617410416] [2020-08-18 12:14:01,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:14:01,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:14:01,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:14:01,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:14:01,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 12:14:01,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:14:01,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 12:14:01,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:14:01,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 12:14:01,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:14:01,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-18 12:14:01,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:14:01,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-08-18 12:14:01,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:14:01,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 682 [2020-08-18 12:14:01,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:14:02,031 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 12:14:02,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617410416] [2020-08-18 12:14:02,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:14:02,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 12:14:02,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493225950] [2020-08-18 12:14:02,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 12:14:02,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:14:02,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 12:14:02,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 12:14:02,034 INFO L87 Difference]: Start difference. First operand 4464 states and 5013 transitions. Second operand 7 states. [2020-08-18 12:14:03,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:14:03,745 INFO L93 Difference]: Finished difference Result 9674 states and 10960 transitions. [2020-08-18 12:14:03,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 12:14:03,751 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 801 [2020-08-18 12:14:03,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:14:03,773 INFO L225 Difference]: With dead ends: 9674 [2020-08-18 12:14:03,773 INFO L226 Difference]: Without dead ends: 5398 [2020-08-18 12:14:03,783 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 12:14:03,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5398 states. [2020-08-18 12:14:03,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5398 to 5206. [2020-08-18 12:14:03,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5206 states. [2020-08-18 12:14:03,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5206 states to 5206 states and 5890 transitions. [2020-08-18 12:14:03,887 INFO L78 Accepts]: Start accepts. Automaton has 5206 states and 5890 transitions. Word has length 801 [2020-08-18 12:14:03,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:14:03,888 INFO L479 AbstractCegarLoop]: Abstraction has 5206 states and 5890 transitions. [2020-08-18 12:14:03,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 12:14:03,889 INFO L276 IsEmpty]: Start isEmpty. Operand 5206 states and 5890 transitions. [2020-08-18 12:14:03,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 806 [2020-08-18 12:14:03,905 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:14:03,906 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 12:14:03,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 12:14:03,906 INFO L427 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:14:03,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:14:03,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1595152538, now seen corresponding path program 1 times [2020-08-18 12:14:03,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:14:03,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1128456275] [2020-08-18 12:14:03,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:14:03,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:14:04,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:14:04,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:14:04,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 12:14:04,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:14:04,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 12:14:04,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:14:04,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 12:14:04,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:14:04,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 337 [2020-08-18 12:14:04,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:14:04,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 467 [2020-08-18 12:14:04,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:14:04,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 546 [2020-08-18 12:14:04,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:14:04,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 686 [2020-08-18 12:14:04,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:14:05,186 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 12:14:05,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1128456275] [2020-08-18 12:14:05,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:14:05,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 12:14:05,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26728901] [2020-08-18 12:14:05,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 12:14:05,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:14:05,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 12:14:05,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-18 12:14:05,188 INFO L87 Difference]: Start difference. First operand 5206 states and 5890 transitions. Second operand 9 states. [2020-08-18 12:14:08,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:14:08,301 INFO L93 Difference]: Finished difference Result 11142 states and 12646 transitions. [2020-08-18 12:14:08,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 12:14:08,308 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 805 [2020-08-18 12:14:08,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:14:08,327 INFO L225 Difference]: With dead ends: 11142 [2020-08-18 12:14:08,327 INFO L226 Difference]: Without dead ends: 6124 [2020-08-18 12:14:08,338 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2020-08-18 12:14:08,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6124 states. [2020-08-18 12:14:08,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6124 to 5754. [2020-08-18 12:14:08,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5754 states. [2020-08-18 12:14:08,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5754 states to 5754 states and 6492 transitions. [2020-08-18 12:14:08,441 INFO L78 Accepts]: Start accepts. Automaton has 5754 states and 6492 transitions. Word has length 805 [2020-08-18 12:14:08,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:14:08,442 INFO L479 AbstractCegarLoop]: Abstraction has 5754 states and 6492 transitions. [2020-08-18 12:14:08,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 12:14:08,442 INFO L276 IsEmpty]: Start isEmpty. Operand 5754 states and 6492 transitions. [2020-08-18 12:14:08,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 849 [2020-08-18 12:14:08,460 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:14:08,460 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 12:14:08,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 12:14:08,461 INFO L427 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:14:08,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:14:08,461 INFO L82 PathProgramCache]: Analyzing trace with hash -322323375, now seen corresponding path program 1 times [2020-08-18 12:14:08,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:14:08,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [357778206] [2020-08-18 12:14:08,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:14:08,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:14:08,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:14:08,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:14:08,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 12:14:08,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:14:08,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 12:14:08,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:14:08,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 12:14:08,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:14:08,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-18 12:14:08,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:14:09,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 477 [2020-08-18 12:14:09,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:14:09,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 550 [2020-08-18 12:14:09,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:14:09,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 729 [2020-08-18 12:14:09,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:14:09,828 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 12:14:09,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [357778206] [2020-08-18 12:14:09,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:14:09,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 12:14:09,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671521777] [2020-08-18 12:14:09,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 12:14:09,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:14:09,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 12:14:09,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-18 12:14:09,830 INFO L87 Difference]: Start difference. First operand 5754 states and 6492 transitions. Second operand 10 states. [2020-08-18 12:14:10,467 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-08-18 12:14:11,820 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2020-08-18 12:14:12,766 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-08-18 12:14:13,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:14:13,831 INFO L93 Difference]: Finished difference Result 11324 states and 12797 transitions. [2020-08-18 12:14:13,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 12:14:13,832 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 848 [2020-08-18 12:14:13,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:14:13,848 INFO L225 Difference]: With dead ends: 11324 [2020-08-18 12:14:13,848 INFO L226 Difference]: Without dead ends: 5758 [2020-08-18 12:14:13,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2020-08-18 12:14:13,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5758 states. [2020-08-18 12:14:13,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5758 to 5756. [2020-08-18 12:14:13,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5756 states. [2020-08-18 12:14:13,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5756 states to 5756 states and 6481 transitions. [2020-08-18 12:14:13,981 INFO L78 Accepts]: Start accepts. Automaton has 5756 states and 6481 transitions. Word has length 848 [2020-08-18 12:14:13,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:14:13,981 INFO L479 AbstractCegarLoop]: Abstraction has 5756 states and 6481 transitions. [2020-08-18 12:14:13,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 12:14:13,982 INFO L276 IsEmpty]: Start isEmpty. Operand 5756 states and 6481 transitions. [2020-08-18 12:14:14,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 878 [2020-08-18 12:14:14,003 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:14:14,004 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 12:14:14,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 12:14:14,004 INFO L427 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:14:14,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:14:14,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1192494146, now seen corresponding path program 1 times [2020-08-18 12:14:14,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:14:14,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605686551] [2020-08-18 12:14:14,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:14:14,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:14:14,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:14:14,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:14:14,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 12:14:14,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:14:14,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 12:14:14,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:14:14,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 12:14:14,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:14:14,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-18 12:14:14,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:14:14,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-08-18 12:14:14,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:14:14,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 579 [2020-08-18 12:14:14,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:14:14,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 758 [2020-08-18 12:14:14,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:14:15,006 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 12:14:15,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605686551] [2020-08-18 12:14:15,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:14:15,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 12:14:15,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907688560] [2020-08-18 12:14:15,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 12:14:15,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:14:15,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 12:14:15,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-18 12:14:15,009 INFO L87 Difference]: Start difference. First operand 5756 states and 6481 transitions. Second operand 9 states. [2020-08-18 12:14:18,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:14:18,638 INFO L93 Difference]: Finished difference Result 13170 states and 14921 transitions. [2020-08-18 12:14:18,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-18 12:14:18,639 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 877 [2020-08-18 12:14:18,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:14:18,659 INFO L225 Difference]: With dead ends: 13170 [2020-08-18 12:14:18,659 INFO L226 Difference]: Without dead ends: 7602 [2020-08-18 12:14:18,671 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2020-08-18 12:14:18,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7602 states. [2020-08-18 12:14:18,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7602 to 7416. [2020-08-18 12:14:18,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7416 states. [2020-08-18 12:14:18,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7416 states to 7416 states and 8323 transitions. [2020-08-18 12:14:18,833 INFO L78 Accepts]: Start accepts. Automaton has 7416 states and 8323 transitions. Word has length 877 [2020-08-18 12:14:18,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:14:18,834 INFO L479 AbstractCegarLoop]: Abstraction has 7416 states and 8323 transitions. [2020-08-18 12:14:18,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 12:14:18,834 INFO L276 IsEmpty]: Start isEmpty. Operand 7416 states and 8323 transitions. [2020-08-18 12:14:18,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1112 [2020-08-18 12:14:18,870 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:14:18,873 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 12:14:18,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 12:14:18,873 INFO L427 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:14:18,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:14:18,874 INFO L82 PathProgramCache]: Analyzing trace with hash -488991978, now seen corresponding path program 1 times [2020-08-18 12:14:18,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:14:18,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1250834697] [2020-08-18 12:14:18,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:14:19,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:14:19,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:14:19,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:14:19,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 12:14:19,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:14:19,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 12:14:19,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:14:19,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 12:14:19,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:14:19,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-18 12:14:19,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:14:19,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 425 [2020-08-18 12:14:19,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:14:19,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 558 [2020-08-18 12:14:19,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:14:19,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 631 [2020-08-18 12:14:19,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:14:19,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 810 [2020-08-18 12:14:19,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:14:19,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 992 [2020-08-18 12:14:19,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:14:20,394 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 12:14:20,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1250834697] [2020-08-18 12:14:20,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:14:20,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 12:14:20,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463170866] [2020-08-18 12:14:20,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 12:14:20,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:14:20,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 12:14:20,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-18 12:14:20,397 INFO L87 Difference]: Start difference. First operand 7416 states and 8323 transitions. Second operand 9 states. [2020-08-18 12:14:23,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:14:23,632 INFO L93 Difference]: Finished difference Result 17064 states and 19350 transitions. [2020-08-18 12:14:23,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-18 12:14:23,633 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1111 [2020-08-18 12:14:23,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:14:23,659 INFO L225 Difference]: With dead ends: 17064 [2020-08-18 12:14:23,659 INFO L226 Difference]: Without dead ends: 9836 [2020-08-18 12:14:23,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2020-08-18 12:14:23,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9836 states. [2020-08-18 12:14:23,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9836 to 8722. [2020-08-18 12:14:23,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8722 states. [2020-08-18 12:14:23,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8722 states to 8722 states and 9968 transitions. [2020-08-18 12:14:23,860 INFO L78 Accepts]: Start accepts. Automaton has 8722 states and 9968 transitions. Word has length 1111 [2020-08-18 12:14:23,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:14:23,862 INFO L479 AbstractCegarLoop]: Abstraction has 8722 states and 9968 transitions. [2020-08-18 12:14:23,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 12:14:23,862 INFO L276 IsEmpty]: Start isEmpty. Operand 8722 states and 9968 transitions.