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 -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem12_label45.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 16:35:44,901 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 16:35:44,903 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 16:35:44,915 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 16:35:44,924 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 16:35:44,924 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 16:35:44,925 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 16:35:44,926 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 16:35:44,927 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 16:35:44,928 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 16:35:44,930 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 16:35:44,932 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 16:35:44,933 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 16:35:44,934 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 16:35:44,935 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 16:35:44,936 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 16:35:44,941 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-09 16:35:44,945 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 16:35:44,949 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 16:35:44,950 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 16:35:44,951 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 16:35:44,952 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 16:35:44,952 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 16:35:44,953 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 16:35:44,953 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 16:35:44,954 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 16:35:44,954 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 16:35:44,955 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 16:35:44,956 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-09 16:35:44,970 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 16:35:44,970 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 16:35:44,971 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 16:35:44,971 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 16:35:44,971 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 16:35:44,972 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 16:35:44,972 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 16:35:44,972 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 16:35:44,972 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 16:35:44,972 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 16:35:44,973 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 16:35:44,973 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 16:35:44,973 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 16:35:44,974 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 16:35:44,974 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 16:35:44,974 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 16:35:44,974 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 16:35:44,974 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 16:35:44,975 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 16:35:44,975 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 16:35:44,975 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 16:35:44,975 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 16:35:44,975 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 16:35:44,976 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 16:35:44,976 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 16:35:44,976 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 16:35:44,976 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 16:35:44,976 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 16:35:44,976 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 16:35:44,977 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 16:35:45,004 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 16:35:45,017 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 16:35:45,020 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 16:35:45,021 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 16:35:45,022 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 16:35:45,022 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label45.c [2019-09-09 16:35:45,079 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9417f3be/2cf6a6d61660494297a0474f5be7ecce/FLAG5a8dfeecf [2019-09-09 16:35:45,779 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 16:35:45,779 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label45.c [2019-09-09 16:35:45,806 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9417f3be/2cf6a6d61660494297a0474f5be7ecce/FLAG5a8dfeecf [2019-09-09 16:35:45,896 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9417f3be/2cf6a6d61660494297a0474f5be7ecce [2019-09-09 16:35:45,909 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 16:35:45,911 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 16:35:45,916 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 16:35:45,916 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 16:35:45,920 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 16:35:45,921 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 04:35:45" (1/1) ... [2019-09-09 16:35:45,924 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57728f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:35:45, skipping insertion in model container [2019-09-09 16:35:45,924 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 04:35:45" (1/1) ... [2019-09-09 16:35:45,932 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 16:35:46,092 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 16:35:47,886 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 16:35:47,893 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 16:35:48,700 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 16:35:48,728 INFO L192 MainTranslator]: Completed translation [2019-09-09 16:35:48,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:35:48 WrapperNode [2019-09-09 16:35:48,729 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 16:35:48,730 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 16:35:48,730 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 16:35:48,730 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 16:35:48,743 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:35:48" (1/1) ... [2019-09-09 16:35:48,745 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:35:48" (1/1) ... [2019-09-09 16:35:48,798 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:35:48" (1/1) ... [2019-09-09 16:35:48,799 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:35:48" (1/1) ... [2019-09-09 16:35:48,922 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:35:48" (1/1) ... [2019-09-09 16:35:48,963 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:35:48" (1/1) ... [2019-09-09 16:35:49,006 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:35:48" (1/1) ... [2019-09-09 16:35:49,054 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 16:35:49,055 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 16:35:49,055 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 16:35:49,056 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 16:35:49,057 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:35:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2019-09-09 16:35:49,130 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 16:35:49,130 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 16:35:49,130 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 16:35:49,130 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 16:35:49,131 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-09-09 16:35:49,131 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-09-09 16:35:49,131 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 16:35:49,132 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 16:35:49,132 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 16:35:49,132 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-09-09 16:35:49,132 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-09-09 16:35:49,133 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 16:35:49,133 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 16:35:49,134 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 16:35:49,134 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 16:35:49,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 16:35:49,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 16:35:53,878 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 16:35:53,879 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 16:35:53,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 04:35:53 BoogieIcfgContainer [2019-09-09 16:35:53,883 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 16:35:53,885 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 16:35:53,885 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 16:35:53,890 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 16:35:53,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 04:35:45" (1/3) ... [2019-09-09 16:35:53,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4528b7db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 04:35:53, skipping insertion in model container [2019-09-09 16:35:53,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:35:48" (2/3) ... [2019-09-09 16:35:53,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4528b7db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 04:35:53, skipping insertion in model container [2019-09-09 16:35:53,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 04:35:53" (3/3) ... [2019-09-09 16:35:53,896 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label45.c [2019-09-09 16:35:53,905 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 16:35:53,913 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 16:35:53,929 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 16:35:53,956 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 16:35:53,956 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 16:35:53,956 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 16:35:53,956 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 16:35:53,956 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 16:35:53,957 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 16:35:53,957 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 16:35:53,957 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 16:35:53,993 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states. [2019-09-09 16:35:54,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-09-09 16:35:54,010 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 16:35:54,011 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 16:35:54,013 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 16:35:54,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:35:54,019 INFO L82 PathProgramCache]: Analyzing trace with hash -157974758, now seen corresponding path program 1 times [2019-09-09 16:35:54,021 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 16:35:54,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:35:54,072 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 16:35:54,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:35:54,073 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 16:35:54,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 16:35:54,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 16:35:54,426 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 16:35:54,427 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 16:35:54,427 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 16:35:54,432 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 16:35:54,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 16:35:54,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 16:35:54,449 INFO L87 Difference]: Start difference. First operand 839 states. Second operand 3 states. [2019-09-09 16:35:59,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 16:35:59,498 INFO L93 Difference]: Finished difference Result 1610 states and 2807 transitions. [2019-09-09 16:35:59,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 16:35:59,504 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 57 [2019-09-09 16:35:59,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 16:35:59,545 INFO L225 Difference]: With dead ends: 1610 [2019-09-09 16:35:59,545 INFO L226 Difference]: Without dead ends: 1542 [2019-09-09 16:35:59,547 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 16:35:59,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2019-09-09 16:35:59,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 1542. [2019-09-09 16:35:59,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1542 states. [2019-09-09 16:35:59,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1542 states to 1542 states and 2702 transitions. [2019-09-09 16:35:59,693 INFO L78 Accepts]: Start accepts. Automaton has 1542 states and 2702 transitions. Word has length 57 [2019-09-09 16:35:59,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 16:35:59,694 INFO L475 AbstractCegarLoop]: Abstraction has 1542 states and 2702 transitions. [2019-09-09 16:35:59,694 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 16:35:59,695 INFO L276 IsEmpty]: Start isEmpty. Operand 1542 states and 2702 transitions. [2019-09-09 16:35:59,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-09-09 16:35:59,700 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 16:35:59,700 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 16:35:59,701 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 16:35:59,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:35:59,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1774223795, now seen corresponding path program 1 times [2019-09-09 16:35:59,701 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 16:35:59,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:35:59,703 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 16:35:59,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:35:59,703 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 16:35:59,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 16:35:59,909 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 16:35:59,910 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 16:35:59,910 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 16:35:59,910 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 16:35:59,912 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 16:35:59,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 16:35:59,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 16:35:59,913 INFO L87 Difference]: Start difference. First operand 1542 states and 2702 transitions. Second operand 4 states. [2019-09-09 16:36:07,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 16:36:07,360 INFO L93 Difference]: Finished difference Result 4610 states and 7717 transitions. [2019-09-09 16:36:07,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 16:36:07,363 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 132 [2019-09-09 16:36:07,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 16:36:07,393 INFO L225 Difference]: With dead ends: 4610 [2019-09-09 16:36:07,394 INFO L226 Difference]: Without dead ends: 4610 [2019-09-09 16:36:07,395 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 16:36:07,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4610 states. [2019-09-09 16:36:07,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4610 to 4610. [2019-09-09 16:36:07,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4610 states. [2019-09-09 16:36:07,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4610 states to 4610 states and 7717 transitions. [2019-09-09 16:36:07,520 INFO L78 Accepts]: Start accepts. Automaton has 4610 states and 7717 transitions. Word has length 132 [2019-09-09 16:36:07,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 16:36:07,523 INFO L475 AbstractCegarLoop]: Abstraction has 4610 states and 7717 transitions. [2019-09-09 16:36:07,523 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 16:36:07,523 INFO L276 IsEmpty]: Start isEmpty. Operand 4610 states and 7717 transitions. [2019-09-09 16:36:07,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-09-09 16:36:07,539 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 16:36:07,539 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 16:36:07,539 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 16:36:07,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:36:07,540 INFO L82 PathProgramCache]: Analyzing trace with hash 773603615, now seen corresponding path program 1 times [2019-09-09 16:36:07,540 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 16:36:07,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:36:07,543 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 16:36:07,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:36:07,544 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 16:36:07,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 16:36:07,837 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 16:36:07,837 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 16:36:07,838 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 16:36:07,838 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 16:36:07,840 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 16:36:07,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 16:36:07,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 16:36:07,841 INFO L87 Difference]: Start difference. First operand 4610 states and 7717 transitions. Second operand 6 states. [2019-09-09 16:36:14,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 16:36:14,561 INFO L93 Difference]: Finished difference Result 9431 states and 15745 transitions. [2019-09-09 16:36:14,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 16:36:14,562 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 170 [2019-09-09 16:36:14,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 16:36:14,625 INFO L225 Difference]: With dead ends: 9431 [2019-09-09 16:36:14,625 INFO L226 Difference]: Without dead ends: 9431 [2019-09-09 16:36:14,634 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-09-09 16:36:14,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9431 states. [2019-09-09 16:36:14,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9431 to 9352. [2019-09-09 16:36:14,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9352 states. [2019-09-09 16:36:14,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9352 states to 9352 states and 15344 transitions. [2019-09-09 16:36:14,916 INFO L78 Accepts]: Start accepts. Automaton has 9352 states and 15344 transitions. Word has length 170 [2019-09-09 16:36:14,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 16:36:14,917 INFO L475 AbstractCegarLoop]: Abstraction has 9352 states and 15344 transitions. [2019-09-09 16:36:14,918 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 16:36:14,918 INFO L276 IsEmpty]: Start isEmpty. Operand 9352 states and 15344 transitions. [2019-09-09 16:36:14,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2019-09-09 16:36:14,924 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 16:36:14,924 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 16:36:14,924 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 16:36:14,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:36:14,925 INFO L82 PathProgramCache]: Analyzing trace with hash 398846734, now seen corresponding path program 1 times [2019-09-09 16:36:14,925 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 16:36:14,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:36:14,926 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 16:36:14,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:36:14,926 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 16:36:14,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 16:36:15,189 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 16:36:15,190 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 16:36:15,190 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 16:36:15,190 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 16:36:15,192 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 16:36:15,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 16:36:15,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-09 16:36:15,193 INFO L87 Difference]: Start difference. First operand 9352 states and 15344 transitions. Second operand 6 states. [2019-09-09 16:36:27,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 16:36:27,309 INFO L93 Difference]: Finished difference Result 25435 states and 41205 transitions. [2019-09-09 16:36:27,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-09 16:36:27,310 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 197 [2019-09-09 16:36:27,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 16:36:27,439 INFO L225 Difference]: With dead ends: 25435 [2019-09-09 16:36:27,440 INFO L226 Difference]: Without dead ends: 25435 [2019-09-09 16:36:27,440 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-09-09 16:36:27,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25435 states. [2019-09-09 16:36:28,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25435 to 25277. [2019-09-09 16:36:28,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25277 states. [2019-09-09 16:36:28,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25277 states to 25277 states and 39486 transitions. [2019-09-09 16:36:28,197 INFO L78 Accepts]: Start accepts. Automaton has 25277 states and 39486 transitions. Word has length 197 [2019-09-09 16:36:28,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 16:36:28,198 INFO L475 AbstractCegarLoop]: Abstraction has 25277 states and 39486 transitions. [2019-09-09 16:36:28,198 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 16:36:28,198 INFO L276 IsEmpty]: Start isEmpty. Operand 25277 states and 39486 transitions. [2019-09-09 16:36:28,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2019-09-09 16:36:28,202 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 16:36:28,203 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 16:36:28,203 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 16:36:28,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:36:28,203 INFO L82 PathProgramCache]: Analyzing trace with hash 364295070, now seen corresponding path program 1 times [2019-09-09 16:36:28,203 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 16:36:28,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:36:28,205 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 16:36:28,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:36:28,205 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 16:36:28,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 16:36:28,381 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 16:36:28,381 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 16:36:28,382 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 16:36:28,382 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 16:36:28,382 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 16:36:28,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 16:36:28,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 16:36:28,383 INFO L87 Difference]: Start difference. First operand 25277 states and 39486 transitions. Second operand 4 states. [2019-09-09 16:36:35,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 16:36:35,982 INFO L93 Difference]: Finished difference Result 38513 states and 54566 transitions. [2019-09-09 16:36:35,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 16:36:35,983 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 205 [2019-09-09 16:36:35,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 16:36:36,165 INFO L225 Difference]: With dead ends: 38513 [2019-09-09 16:36:36,167 INFO L226 Difference]: Without dead ends: 38513 [2019-09-09 16:36:36,167 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 16:36:36,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38513 states. [2019-09-09 16:36:37,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38513 to 36979. [2019-09-09 16:36:37,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36979 states. [2019-09-09 16:36:37,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36979 states to 36979 states and 52630 transitions. [2019-09-09 16:36:37,112 INFO L78 Accepts]: Start accepts. Automaton has 36979 states and 52630 transitions. Word has length 205 [2019-09-09 16:36:37,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 16:36:37,112 INFO L475 AbstractCegarLoop]: Abstraction has 36979 states and 52630 transitions. [2019-09-09 16:36:37,113 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 16:36:37,113 INFO L276 IsEmpty]: Start isEmpty. Operand 36979 states and 52630 transitions. [2019-09-09 16:36:37,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2019-09-09 16:36:37,137 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 16:36:37,137 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 16:36:37,138 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 16:36:37,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:36:37,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1151541650, now seen corresponding path program 1 times [2019-09-09 16:36:37,138 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 16:36:37,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:36:37,140 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 16:36:37,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:36:37,140 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 16:36:37,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 16:36:38,709 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 100 proven. 106 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 16:36:38,710 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 16:36:38,710 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 16:36:38,712 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 346 with the following transitions: [2019-09-09 16:36:38,715 INFO L207 CegarAbsIntRunner]: [0], [1], [1868], [1875], [1883], [1891], [1899], [1907], [1915], [1923], [1931], [1939], [1947], [1955], [1963], [1971], [1979], [1987], [1995], [2003], [2011], [2019], [2027], [2035], [2043], [2051], [2059], [2067], [2075], [2083], [2091], [2099], [2107], [2115], [2123], [2131], [2139], [2147], [2155], [2163], [2171], [2179], [2187], [2195], [2203], [2211], [2219], [2227], [2231], [2233], [2236], [2244], [2252], [2260], [2268], [2276], [2284], [2292], [2300], [2308], [2316], [2324], [2332], [2340], [2348], [2356], [2361], [2365], [2369], [2373], [2377], [2381], [2385], [2389], [2393], [2397], [2401], [2405], [2409], [2413], [2417], [2421], [2425], [2429], [2433], [2437], [2441], [2445], [2449], [2453], [2457], [2461], [2465], [2469], [2473], [2477], [2481], [2485], [2489], [2493], [2497], [2501], [2505], [2509], [2513], [2517], [2521], [2524], [2525], [2529], [2533], [2537], [2541], [2545], [2549], [2553], [2557], [2561], [2565], [2569], [2573], [2577], [2581], [2585], [2589], [2593], [2597], [2601], [2605], [2609], [2613], [2617], [2621], [2625], [2629], [2633], [2637], [2641], [2645], [2649], [2653], [2657], [2661], [2665], [2669], [2673], [2677], [2681], [2685], [2689], [2693], [2697], [2701], [2705], [2709], [2713], [2717], [2721], [2725], [2729], [2733], [2737], [2741], [2745], [2749], [2753], [2757], [2761], [2765], [2769], [2773], [2777], [2781], [2785], [2789], [2793], [2796], [3240], [3244], [3253], [3257], [3259], [3270], [3271], [3272], [3274], [3275] [2019-09-09 16:36:38,813 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 16:36:38,815 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 16:37:20,316 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 16:37:20,318 INFO L272 AbstractInterpreter]: Visited 183 different actions 183 times. Never merged. Never widened. Performed 377 root evaluator evaluations with a maximum evaluation depth of 16. Performed 377 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Never found a fixpoint. Largest state had 26 variables. [2019-09-09 16:37:20,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:37:20,322 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 16:38:07,376 INFO L227 lantSequenceWeakener]: Weakened 326 states. On average, predicates are now at 75.58% of their original sizes. [2019-09-09 16:38:07,376 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 16:38:07,496 INFO L420 sIntCurrentIteration]: We unified 344 AI predicates to 344 [2019-09-09 16:38:07,496 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 16:38:07,497 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 16:38:07,497 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [5] total 15 [2019-09-09 16:38:07,498 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 16:38:07,498 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-09 16:38:07,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-09 16:38:07,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-09-09 16:38:07,499 INFO L87 Difference]: Start difference. First operand 36979 states and 52630 transitions. Second operand 12 states. [2019-09-09 16:42:56,311 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.