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/Problem01_label56.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 17:14:55,876 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 17:14:55,878 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 17:14:55,890 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-02 17:14:55,900 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 17:14:55,901 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 17:14:55,901 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 17:14:55,903 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 17:14:55,903 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 17:14:55,904 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 17:14:55,906 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 17:14:55,908 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 17:14:55,910 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 17:14:55,911 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 17:14:55,912 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 17:14:55,913 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 17:14:55,915 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 17:14:55,923 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 17:14:55,924 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 17:14:55,925 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 17:14:55,925 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 [2019-10-02 17:14:55,940 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 17:14:55,941 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 17:14:55,941 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 17:14:55,941 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 17:14:55,942 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 17:14:55,942 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 17:14:55,942 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 17:14:55,943 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 17:14:55,943 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 17:14:55,943 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 17:14:55,944 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 17:14:55,944 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 17:14:55,945 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 17:14:55,945 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 17:14:55,945 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 17:14:55,946 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 17:14:55,946 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 17:14:55,946 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 17:14:55,946 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 17:14:55,947 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 17:14:55,947 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 17:14:55,947 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 17:14:55,947 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 17:14:55,947 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 17:14:55,948 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 17:14:55,948 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 17:14:55,949 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 17:14:55,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 17:14:55,949 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 17:14:55,949 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 17:14:55,985 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 17:14:55,996 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 17:14:56,000 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 17:14:56,001 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 17:14:56,002 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 17:14:56,002 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label56.c [2019-10-02 17:14:56,070 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e2cce4ea/80e8a5a51b1d47fba4aa6e632b3a8c69/FLAG562d892f5 [2019-10-02 17:14:56,653 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 17:14:56,654 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label56.c [2019-10-02 17:14:56,671 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e2cce4ea/80e8a5a51b1d47fba4aa6e632b3a8c69/FLAG562d892f5 [2019-10-02 17:14:56,960 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e2cce4ea/80e8a5a51b1d47fba4aa6e632b3a8c69 [2019-10-02 17:14:56,969 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 17:14:56,970 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 17:14:56,971 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 17:14:56,972 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 17:14:56,975 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 17:14:56,976 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 05:14:56" (1/1) ... [2019-10-02 17:14:56,979 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cca5a79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:14:56, skipping insertion in model container [2019-10-02 17:14:56,979 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 05:14:56" (1/1) ... [2019-10-02 17:14:56,986 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 17:14:57,042 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 17:14:57,670 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 17:14:57,676 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 17:14:57,757 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 17:14:57,776 INFO L192 MainTranslator]: Completed translation [2019-10-02 17:14:57,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:14:57 WrapperNode [2019-10-02 17:14:57,777 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 17:14:57,778 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 17:14:57,778 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 17:14:57,778 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 17:14:57,790 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:14:57" (1/1) ... [2019-10-02 17:14:57,791 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:14:57" (1/1) ... [2019-10-02 17:14:57,808 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:14:57" (1/1) ... [2019-10-02 17:14:57,809 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:14:57" (1/1) ... [2019-10-02 17:14:57,863 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:14:57" (1/1) ... [2019-10-02 17:14:57,881 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:14:57" (1/1) ... [2019-10-02 17:14:57,895 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:14:57" (1/1) ... [2019-10-02 17:14:57,908 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 17:14:57,909 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 17:14:57,909 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 17:14:57,909 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 17:14:57,910 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:14:57" (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 [2019-10-02 17:14:57,995 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 17:14:57,995 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 17:14:57,995 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 17:14:57,996 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 17:14:57,996 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 17:14:57,996 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 17:14:57,996 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 17:14:57,996 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 17:14:57,997 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 17:14:57,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 17:14:57,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 17:14:59,288 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 17:14:59,288 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 17:14:59,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 05:14:59 BoogieIcfgContainer [2019-10-02 17:14:59,292 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 17:14:59,294 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 17:14:59,294 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 17:14:59,297 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 17:14:59,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 05:14:56" (1/3) ... [2019-10-02 17:14:59,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@272e26b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 05:14:59, skipping insertion in model container [2019-10-02 17:14:59,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:14:57" (2/3) ... [2019-10-02 17:14:59,300 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@272e26b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 05:14:59, skipping insertion in model container [2019-10-02 17:14:59,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 05:14:59" (3/3) ... [2019-10-02 17:14:59,303 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label56.c [2019-10-02 17:14:59,316 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 17:14:59,327 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 17:14:59,346 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 17:14:59,378 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 17:14:59,379 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 17:14:59,379 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 17:14:59,379 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 17:14:59,379 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 17:14:59,380 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 17:14:59,380 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 17:14:59,380 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 17:14:59,411 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-10-02 17:14:59,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-10-02 17:14:59,428 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 17:14:59,429 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 17:14:59,431 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 17:14:59,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 17:14:59,438 INFO L82 PathProgramCache]: Analyzing trace with hash -503641322, now seen corresponding path program 1 times [2019-10-02 17:14:59,440 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 17:14:59,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:14:59,498 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 17:14:59,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:14:59,499 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 17:14:59,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 17:14:59,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 17:14:59,963 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 17:14:59,963 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 17:14:59,963 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 17:14:59,970 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 17:14:59,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 17:14:59,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 17:14:59,988 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 3 states. [2019-10-02 17:15:00,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 17:15:00,974 INFO L93 Difference]: Finished difference Result 346 states and 517 transitions. [2019-10-02 17:15:00,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 17:15:00,975 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 82 [2019-10-02 17:15:00,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 17:15:01,007 INFO L225 Difference]: With dead ends: 346 [2019-10-02 17:15:01,007 INFO L226 Difference]: Without dead ends: 278 [2019-10-02 17:15:01,011 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 17:15:01,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-10-02 17:15:01,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2019-10-02 17:15:01,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-10-02 17:15:01,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 412 transitions. [2019-10-02 17:15:01,136 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 412 transitions. Word has length 82 [2019-10-02 17:15:01,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 17:15:01,138 INFO L475 AbstractCegarLoop]: Abstraction has 278 states and 412 transitions. [2019-10-02 17:15:01,138 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 17:15:01,138 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 412 transitions. [2019-10-02 17:15:01,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-10-02 17:15:01,152 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 17:15:01,152 INFO L411 BasicCegarLoop]: trace histogram [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] [2019-10-02 17:15:01,152 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 17:15:01,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 17:15:01,153 INFO L82 PathProgramCache]: Analyzing trace with hash 613251555, now seen corresponding path program 1 times [2019-10-02 17:15:01,153 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 17:15:01,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:15:01,156 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 17:15:01,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:15:01,157 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 17:15:01,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 17:15:01,285 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 17:15:01,285 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 17:15:01,285 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 17:15:01,285 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 17:15:01,287 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 17:15:01,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 17:15:01,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 17:15:01,288 INFO L87 Difference]: Start difference. First operand 278 states and 412 transitions. Second operand 3 states. [2019-10-02 17:15:01,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 17:15:01,870 INFO L93 Difference]: Finished difference Result 548 states and 776 transitions. [2019-10-02 17:15:01,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 17:15:01,870 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 99 [2019-10-02 17:15:01,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 17:15:01,875 INFO L225 Difference]: With dead ends: 548 [2019-10-02 17:15:01,875 INFO L226 Difference]: Without dead ends: 548 [2019-10-02 17:15:01,876 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 17:15:01,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2019-10-02 17:15:01,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 413. [2019-10-02 17:15:01,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 413 states. [2019-10-02 17:15:01,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 593 transitions. [2019-10-02 17:15:01,921 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 593 transitions. Word has length 99 [2019-10-02 17:15:01,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 17:15:01,922 INFO L475 AbstractCegarLoop]: Abstraction has 413 states and 593 transitions. [2019-10-02 17:15:01,922 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 17:15:01,923 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 593 transitions. [2019-10-02 17:15:01,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-02 17:15:01,928 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 17:15:01,929 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 17:15:01,929 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 17:15:01,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 17:15:01,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1499324049, now seen corresponding path program 1 times [2019-10-02 17:15:01,930 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 17:15:01,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:15:01,932 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 17:15:01,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:15:01,932 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 17:15:01,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 17:15:02,095 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 17:15:02,096 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 17:15:02,096 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 17:15:02,097 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 17:15:02,099 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 17:15:02,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 17:15:02,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 17:15:02,100 INFO L87 Difference]: Start difference. First operand 413 states and 593 transitions. Second operand 6 states. [2019-10-02 17:15:02,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 17:15:02,937 INFO L93 Difference]: Finished difference Result 709 states and 975 transitions. [2019-10-02 17:15:02,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 17:15:02,937 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 125 [2019-10-02 17:15:02,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 17:15:02,946 INFO L225 Difference]: With dead ends: 709 [2019-10-02 17:15:02,947 INFO L226 Difference]: Without dead ends: 709 [2019-10-02 17:15:02,947 INFO L640 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 [2019-10-02 17:15:02,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2019-10-02 17:15:02,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 699. [2019-10-02 17:15:02,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 699 states. [2019-10-02 17:15:02,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 950 transitions. [2019-10-02 17:15:02,984 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 950 transitions. Word has length 125 [2019-10-02 17:15:02,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 17:15:02,993 INFO L475 AbstractCegarLoop]: Abstraction has 699 states and 950 transitions. [2019-10-02 17:15:02,993 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 17:15:02,993 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 950 transitions. [2019-10-02 17:15:02,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-10-02 17:15:02,997 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 17:15:02,997 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 17:15:02,997 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 17:15:02,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 17:15:02,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1223806666, now seen corresponding path program 1 times [2019-10-02 17:15:02,998 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 17:15:03,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:15:03,002 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 17:15:03,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:15:03,002 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 17:15:03,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 17:15:03,194 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 57 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 17:15:03,194 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 17:15:03,195 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 17:15:03,196 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 137 with the following transitions: [2019-10-02 17:15:03,198 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [6], [10], [14], [17], [18], [22], [26], [30], [34], [38], [42], [46], [50], [54], [58], [62], [66], [70], [74], [78], [82], [86], [90], [94], [98], [102], [106], [110], [114], [118], [122], [126], [130], [134], [138], [142], [145], [146], [150], [154], [158], [162], [166], [170], [174], [178], [182], [186], [190], [194], [198], [202], [206], [210], [214], [218], [222], [226], [230], [234], [238], [242], [246], [250], [254], [258], [262], [266], [273], [281], [289], [297], [301], [303], [757], [761], [770], [774], [776], [781], [782], [783], [785], [786] [2019-10-02 17:15:03,268 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 17:15:03,268 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)