/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label18.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 15:04:02,743 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 15:04:02,747 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 15:04:02,792 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-09-24 15:04:02,818 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 15:04:02,821 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 15:04:02,824 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 15:04:02,826 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 15:04:02,830 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 15:04:02,831 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 15:04:02,832 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 15:04:02,839 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 15:04:02,840 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 15:04:02,842 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 15:04:02,846 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 15:04:02,847 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 15:04:02,849 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-24 15:04:02,857 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 15:04:02,858 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 15:04:02,859 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 15:04:02,860 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 15:04:02,886 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 15:04:02,887 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 15:04:02,888 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 15:04:02,888 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 15:04:02,888 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 15:04:02,889 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 15:04:02,889 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 15:04:02,889 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 15:04:02,889 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 15:04:02,890 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 15:04:02,890 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 15:04:02,890 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 15:04:02,890 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 15:04:02,890 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 15:04:02,891 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 15:04:02,891 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 15:04:02,891 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 15:04:02,891 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 15:04:02,891 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 15:04:02,892 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 15:04:02,892 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 15:04:02,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 15:04:02,892 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 15:04:02,892 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 15:04:02,893 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 15:04:02,893 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 15:04:02,893 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 15:04:02,893 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 15:04:02,893 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 15:04:02,894 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-09-24 15:04:03,364 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 15:04:03,383 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 15:04:03,388 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 15:04:03,389 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 15:04:03,390 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 15:04:03,391 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label18.c [2020-09-24 15:04:03,487 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d7fc77de0/8adf036f391a406ab16ded6c2cbfca0a/FLAG8f626247f [2020-09-24 15:04:04,168 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 15:04:04,169 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem11_label18.c [2020-09-24 15:04:04,185 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d7fc77de0/8adf036f391a406ab16ded6c2cbfca0a/FLAG8f626247f [2020-09-24 15:04:04,370 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d7fc77de0/8adf036f391a406ab16ded6c2cbfca0a [2020-09-24 15:04:04,387 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 15:04:04,394 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 15:04:04,399 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 15:04:04,400 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 15:04:04,406 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 15:04:04,407 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:04:04" (1/1) ... [2020-09-24 15:04:04,413 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f58caab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:04:04, skipping insertion in model container [2020-09-24 15:04:04,413 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:04:04" (1/1) ... [2020-09-24 15:04:04,423 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 15:04:04,502 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 15:04:05,364 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 15:04:05,373 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 15:04:05,589 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 15:04:05,612 INFO L208 MainTranslator]: Completed translation [2020-09-24 15:04:05,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:04:05 WrapperNode [2020-09-24 15:04:05,614 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 15:04:05,615 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 15:04:05,615 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 15:04:05,615 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 15:04:05,634 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:04:05" (1/1) ... [2020-09-24 15:04:05,636 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:04:05" (1/1) ... [2020-09-24 15:04:05,662 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:04:05" (1/1) ... [2020-09-24 15:04:05,663 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:04:05" (1/1) ... [2020-09-24 15:04:05,716 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:04:05" (1/1) ... [2020-09-24 15:04:05,731 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:04:05" (1/1) ... [2020-09-24 15:04:05,739 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:04:05" (1/1) ... [2020-09-24 15:04:05,751 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 15:04:05,751 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 15:04:05,752 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 15:04:05,752 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 15:04:05,753 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:04:05" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 15:04:05,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 15:04:05,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 15:04:05,856 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 15:04:05,856 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 15:04:05,856 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 15:04:05,857 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 15:04:05,857 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 15:04:05,857 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 15:04:05,857 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 15:04:05,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 15:04:05,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 15:04:08,379 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 15:04:08,380 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 15:04:08,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:04:08 BoogieIcfgContainer [2020-09-24 15:04:08,401 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 15:04:08,403 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 15:04:08,403 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 15:04:08,407 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 15:04:08,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 03:04:04" (1/3) ... [2020-09-24 15:04:08,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a7ef218 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:04:08, skipping insertion in model container [2020-09-24 15:04:08,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:04:05" (2/3) ... [2020-09-24 15:04:08,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a7ef218 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:04:08, skipping insertion in model container [2020-09-24 15:04:08,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:04:08" (3/3) ... [2020-09-24 15:04:08,418 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label18.c [2020-09-24 15:04:08,430 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 15:04:08,447 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 15:04:08,470 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 15:04:08,502 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 15:04:08,502 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 15:04:08,502 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 15:04:08,502 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 15:04:08,503 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 15:04:08,503 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 15:04:08,503 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 15:04:08,503 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 15:04:08,540 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states. [2020-09-24 15:04:08,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-24 15:04:08,550 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:04:08,552 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:04:08,553 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:04:08,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:04:08,561 INFO L82 PathProgramCache]: Analyzing trace with hash -123889732, now seen corresponding path program 1 times [2020-09-24 15:04:08,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:04:08,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [830239290] [2020-09-24 15:04:08,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:04:08,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:08,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:04:08,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:09,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:04:09,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [830239290] [2020-09-24 15:04:09,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:04:09,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 15:04:09,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931705151] [2020-09-24 15:04:09,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 15:04:09,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:04:09,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 15:04:09,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 15:04:09,064 INFO L87 Difference]: Start difference. First operand 813 states. Second operand 5 states. [2020-09-24 15:04:14,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:04:14,562 INFO L93 Difference]: Finished difference Result 2361 states and 3156 transitions. [2020-09-24 15:04:14,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 15:04:14,565 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2020-09-24 15:04:14,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:04:14,607 INFO L225 Difference]: With dead ends: 2361 [2020-09-24 15:04:14,608 INFO L226 Difference]: Without dead ends: 1487 [2020-09-24 15:04:14,627 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-24 15:04:14,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1487 states. [2020-09-24 15:04:14,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1487 to 1155. [2020-09-24 15:04:14,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1155 states. [2020-09-24 15:04:14,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1155 states to 1155 states and 1484 transitions. [2020-09-24 15:04:14,786 INFO L78 Accepts]: Start accepts. Automaton has 1155 states and 1484 transitions. Word has length 55 [2020-09-24 15:04:14,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:04:14,787 INFO L479 AbstractCegarLoop]: Abstraction has 1155 states and 1484 transitions. [2020-09-24 15:04:14,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 15:04:14,787 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states and 1484 transitions. [2020-09-24 15:04:14,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-09-24 15:04:14,796 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:04:14,797 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:04:14,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 15:04:14,797 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:04:14,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:04:14,798 INFO L82 PathProgramCache]: Analyzing trace with hash 736411249, now seen corresponding path program 1 times [2020-09-24 15:04:14,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:04:14,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [986394516] [2020-09-24 15:04:14,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:04:14,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:14,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:04:14,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:15,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-24 15:04:15,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:15,165 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:04:15,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [986394516] [2020-09-24 15:04:15,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:04:15,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 15:04:15,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803474206] [2020-09-24 15:04:15,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 15:04:15,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:04:15,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 15:04:15,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 15:04:15,171 INFO L87 Difference]: Start difference. First operand 1155 states and 1484 transitions. Second operand 7 states. [2020-09-24 15:04:20,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:04:20,091 INFO L93 Difference]: Finished difference Result 3082 states and 4163 transitions. [2020-09-24 15:04:20,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 15:04:20,092 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 136 [2020-09-24 15:04:20,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:04:20,109 INFO L225 Difference]: With dead ends: 3082 [2020-09-24 15:04:20,110 INFO L226 Difference]: Without dead ends: 1944 [2020-09-24 15:04:20,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-09-24 15:04:20,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2020-09-24 15:04:20,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1847. [2020-09-24 15:04:20,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1847 states. [2020-09-24 15:04:20,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1847 states to 1847 states and 2324 transitions. [2020-09-24 15:04:20,210 INFO L78 Accepts]: Start accepts. Automaton has 1847 states and 2324 transitions. Word has length 136 [2020-09-24 15:04:20,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:04:20,213 INFO L479 AbstractCegarLoop]: Abstraction has 1847 states and 2324 transitions. [2020-09-24 15:04:20,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 15:04:20,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1847 states and 2324 transitions. [2020-09-24 15:04:20,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-09-24 15:04:20,227 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:04:20,228 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:04:20,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 15:04:20,228 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:04:20,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:04:20,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1086264008, now seen corresponding path program 1 times [2020-09-24 15:04:20,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:04:20,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1139250572] [2020-09-24 15:04:20,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:04:20,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:20,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:04:20,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:20,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-24 15:04:20,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:20,549 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:04:20,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1139250572] [2020-09-24 15:04:20,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:04:20,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 15:04:20,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308363470] [2020-09-24 15:04:20,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 15:04:20,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:04:20,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 15:04:20,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 15:04:20,552 INFO L87 Difference]: Start difference. First operand 1847 states and 2324 transitions. Second operand 7 states. [2020-09-24 15:04:25,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:04:25,511 INFO L93 Difference]: Finished difference Result 4824 states and 6321 transitions. [2020-09-24 15:04:25,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 15:04:25,513 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 144 [2020-09-24 15:04:25,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:04:25,530 INFO L225 Difference]: With dead ends: 4824 [2020-09-24 15:04:25,531 INFO L226 Difference]: Without dead ends: 2994 [2020-09-24 15:04:25,538 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-09-24 15:04:25,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2994 states. [2020-09-24 15:04:25,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2994 to 2913. [2020-09-24 15:04:25,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2913 states. [2020-09-24 15:04:25,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2913 states to 2913 states and 3624 transitions. [2020-09-24 15:04:25,632 INFO L78 Accepts]: Start accepts. Automaton has 2913 states and 3624 transitions. Word has length 144 [2020-09-24 15:04:25,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:04:25,633 INFO L479 AbstractCegarLoop]: Abstraction has 2913 states and 3624 transitions. [2020-09-24 15:04:25,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 15:04:25,634 INFO L276 IsEmpty]: Start isEmpty. Operand 2913 states and 3624 transitions. [2020-09-24 15:04:25,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-09-24 15:04:25,639 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:04:25,640 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-09-24 15:04:25,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 15:04:25,640 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:04:25,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:04:25,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1034486148, now seen corresponding path program 1 times [2020-09-24 15:04:25,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:04:25,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1113404421] [2020-09-24 15:04:25,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:04:25,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:25,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:04:25,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:25,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-24 15:04:25,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:25,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-09-24 15:04:26,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:26,129 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 74 proven. 65 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-24 15:04:26,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1113404421] [2020-09-24 15:04:26,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:04:26,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 15:04:26,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970619079] [2020-09-24 15:04:26,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 15:04:26,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:04:26,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 15:04:26,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 15:04:26,134 INFO L87 Difference]: Start difference. First operand 2913 states and 3624 transitions. Second operand 8 states. [2020-09-24 15:04:31,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:04:31,034 INFO L93 Difference]: Finished difference Result 5476 states and 6930 transitions. [2020-09-24 15:04:31,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 15:04:31,039 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 220 [2020-09-24 15:04:31,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:04:31,055 INFO L225 Difference]: With dead ends: 5476 [2020-09-24 15:04:31,056 INFO L226 Difference]: Without dead ends: 2974 [2020-09-24 15:04:31,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-09-24 15:04:31,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2974 states. [2020-09-24 15:04:31,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2974 to 2917. [2020-09-24 15:04:31,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2917 states. [2020-09-24 15:04:31,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2917 states to 2917 states and 3623 transitions. [2020-09-24 15:04:31,157 INFO L78 Accepts]: Start accepts. Automaton has 2917 states and 3623 transitions. Word has length 220 [2020-09-24 15:04:31,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:04:31,159 INFO L479 AbstractCegarLoop]: Abstraction has 2917 states and 3623 transitions. [2020-09-24 15:04:31,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 15:04:31,159 INFO L276 IsEmpty]: Start isEmpty. Operand 2917 states and 3623 transitions. [2020-09-24 15:04:31,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2020-09-24 15:04:31,164 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:04:31,165 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:04:31,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 15:04:31,165 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:04:31,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:04:31,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1151458182, now seen corresponding path program 1 times [2020-09-24 15:04:31,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:04:31,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1371810450] [2020-09-24 15:04:31,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:04:31,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:31,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:04:31,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:31,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-24 15:04:31,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:31,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2020-09-24 15:04:31,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:31,613 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 116 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-24 15:04:31,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1371810450] [2020-09-24 15:04:31,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:04:31,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 15:04:31,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317742083] [2020-09-24 15:04:31,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 15:04:31,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:04:31,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 15:04:31,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-24 15:04:31,616 INFO L87 Difference]: Start difference. First operand 2917 states and 3623 transitions. Second operand 6 states. [2020-09-24 15:04:36,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:04:36,963 INFO L93 Difference]: Finished difference Result 7172 states and 9353 transitions. [2020-09-24 15:04:36,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 15:04:36,964 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 269 [2020-09-24 15:04:36,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:04:36,996 INFO L225 Difference]: With dead ends: 7172 [2020-09-24 15:04:36,996 INFO L226 Difference]: Without dead ends: 4666 [2020-09-24 15:04:37,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-24 15:04:37,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4666 states. [2020-09-24 15:04:37,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4666 to 4601. [2020-09-24 15:04:37,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4601 states. [2020-09-24 15:04:37,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4601 states to 4601 states and 5915 transitions. [2020-09-24 15:04:37,129 INFO L78 Accepts]: Start accepts. Automaton has 4601 states and 5915 transitions. Word has length 269 [2020-09-24 15:04:37,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:04:37,129 INFO L479 AbstractCegarLoop]: Abstraction has 4601 states and 5915 transitions. [2020-09-24 15:04:37,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 15:04:37,130 INFO L276 IsEmpty]: Start isEmpty. Operand 4601 states and 5915 transitions. [2020-09-24 15:04:37,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2020-09-24 15:04:37,137 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:04:37,138 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:04:37,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 15:04:37,138 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:04:37,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:04:37,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1320429082, now seen corresponding path program 1 times [2020-09-24 15:04:37,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:04:37,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1745755698] [2020-09-24 15:04:37,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:04:37,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:37,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:04:37,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:37,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-24 15:04:37,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:37,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2020-09-24 15:04:37,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:37,520 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 77 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-09-24 15:04:37,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1745755698] [2020-09-24 15:04:37,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:04:37,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 15:04:37,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704478989] [2020-09-24 15:04:37,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 15:04:37,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:04:37,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 15:04:37,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 15:04:37,533 INFO L87 Difference]: Start difference. First operand 4601 states and 5915 transitions. Second operand 5 states. [2020-09-24 15:04:42,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:04:42,077 INFO L93 Difference]: Finished difference Result 9909 states and 13093 transitions. [2020-09-24 15:04:42,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 15:04:42,078 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 277 [2020-09-24 15:04:42,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:04:42,108 INFO L225 Difference]: With dead ends: 9909 [2020-09-24 15:04:42,108 INFO L226 Difference]: Without dead ends: 5719 [2020-09-24 15:04:42,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-24 15:04:42,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5719 states. [2020-09-24 15:04:42,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5719 to 5662. [2020-09-24 15:04:42,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5662 states. [2020-09-24 15:04:42,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5662 states to 5662 states and 7396 transitions. [2020-09-24 15:04:42,274 INFO L78 Accepts]: Start accepts. Automaton has 5662 states and 7396 transitions. Word has length 277 [2020-09-24 15:04:42,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:04:42,275 INFO L479 AbstractCegarLoop]: Abstraction has 5662 states and 7396 transitions. [2020-09-24 15:04:42,276 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 15:04:42,276 INFO L276 IsEmpty]: Start isEmpty. Operand 5662 states and 7396 transitions. [2020-09-24 15:04:42,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2020-09-24 15:04:42,283 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:04:42,284 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:04:42,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 15:04:42,284 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:04:42,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:04:42,285 INFO L82 PathProgramCache]: Analyzing trace with hash -93697981, now seen corresponding path program 1 times [2020-09-24 15:04:42,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:04:42,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574118237] [2020-09-24 15:04:42,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:04:42,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:42,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:04:42,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:42,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-24 15:04:42,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:42,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2020-09-24 15:04:42,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:42,943 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 84 proven. 2 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2020-09-24 15:04:42,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574118237] [2020-09-24 15:04:42,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:04:42,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 15:04:42,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193389394] [2020-09-24 15:04:42,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 15:04:42,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:04:42,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 15:04:42,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-24 15:04:42,947 INFO L87 Difference]: Start difference. First operand 5662 states and 7396 transitions. Second operand 9 states. [2020-09-24 15:04:51,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:04:51,372 INFO L93 Difference]: Finished difference Result 14775 states and 20627 transitions. [2020-09-24 15:04:51,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 15:04:51,373 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 279 [2020-09-24 15:04:51,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:04:51,429 INFO L225 Difference]: With dead ends: 14775 [2020-09-24 15:04:51,429 INFO L226 Difference]: Without dead ends: 9524 [2020-09-24 15:04:51,445 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-09-24 15:04:51,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9524 states. [2020-09-24 15:04:51,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9524 to 9230. [2020-09-24 15:04:51,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9230 states. [2020-09-24 15:04:51,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9230 states to 9230 states and 12961 transitions. [2020-09-24 15:04:51,714 INFO L78 Accepts]: Start accepts. Automaton has 9230 states and 12961 transitions. Word has length 279 [2020-09-24 15:04:51,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:04:51,715 INFO L479 AbstractCegarLoop]: Abstraction has 9230 states and 12961 transitions. [2020-09-24 15:04:51,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 15:04:51,716 INFO L276 IsEmpty]: Start isEmpty. Operand 9230 states and 12961 transitions. [2020-09-24 15:04:51,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2020-09-24 15:04:51,730 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:04:51,731 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:04:51,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 15:04:51,732 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:04:51,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:04:51,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1780607293, now seen corresponding path program 1 times [2020-09-24 15:04:51,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:04:51,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2010702314] [2020-09-24 15:04:51,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:04:51,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:51,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:04:51,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:51,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-24 15:04:51,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:52,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2020-09-24 15:04:52,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:52,133 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 150 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 15:04:52,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2010702314] [2020-09-24 15:04:52,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:04:52,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 15:04:52,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306229371] [2020-09-24 15:04:52,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 15:04:52,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:04:52,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 15:04:52,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-24 15:04:52,137 INFO L87 Difference]: Start difference. First operand 9230 states and 12961 transitions. Second operand 9 states. [2020-09-24 15:05:01,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:05:01,307 INFO L93 Difference]: Finished difference Result 29358 states and 43858 transitions. [2020-09-24 15:05:01,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 15:05:01,308 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 285 [2020-09-24 15:05:01,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:05:01,421 INFO L225 Difference]: With dead ends: 29358 [2020-09-24 15:05:01,422 INFO L226 Difference]: Without dead ends: 20539 [2020-09-24 15:05:01,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2020-09-24 15:05:01,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20539 states. [2020-09-24 15:05:02,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20539 to 20239. [2020-09-24 15:05:02,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20239 states. [2020-09-24 15:05:02,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20239 states to 20239 states and 28166 transitions. [2020-09-24 15:05:02,060 INFO L78 Accepts]: Start accepts. Automaton has 20239 states and 28166 transitions. Word has length 285 [2020-09-24 15:05:02,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:05:02,061 INFO L479 AbstractCegarLoop]: Abstraction has 20239 states and 28166 transitions. [2020-09-24 15:05:02,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 15:05:02,061 INFO L276 IsEmpty]: Start isEmpty. Operand 20239 states and 28166 transitions. [2020-09-24 15:05:02,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2020-09-24 15:05:02,072 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:05:02,073 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:05:02,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 15:05:02,073 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:05:02,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:05:02,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1312144757, now seen corresponding path program 1 times [2020-09-24 15:05:02,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:05:02,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1730145742] [2020-09-24 15:05:02,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:05:02,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:02,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:05:02,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:02,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-24 15:05:02,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:02,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2020-09-24 15:05:02,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:05:02,678 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 77 proven. 2 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-09-24 15:05:02,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1730145742] [2020-09-24 15:05:02,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:05:02,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 15:05:02,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338904460] [2020-09-24 15:05:02,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 15:05:02,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:05:02,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 15:05:02,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 15:05:02,689 INFO L87 Difference]: Start difference. First operand 20239 states and 28166 transitions. Second operand 5 states.