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_label55.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 17:14:54,367 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 17:14:54,369 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 17:14:54,381 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-02 17:14:54,391 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 17:14:54,392 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 17:14:54,393 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 17:14:54,394 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 17:14:54,394 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 17:14:54,395 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 17:14:54,397 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 17:14:54,399 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 17:14:54,400 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 17:14:54,401 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 17:14:54,402 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 17:14:54,403 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 17:14:54,405 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 17:14:54,407 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-02 17:14:54,408 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-02 17:14:54,409 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-02 17:14:54,410 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-02 17:14:54,411 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-02 17:14:54,411 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-02 17:14:54,411 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-02 17:14:54,412 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-02 17:14:54,412 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 17:14:54,413 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 17:14:54,413 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 17:14:54,414 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 17:14:54,429 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 17:14:54,429 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 17:14:54,429 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 17:14:54,429 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 17:14:54,430 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 17:14:54,430 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 17:14:54,430 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 17:14:54,431 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 17:14:54,431 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 17:14:54,431 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 17:14:54,432 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 17:14:54,432 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 17:14:54,432 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 17:14:54,432 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 17:14:54,432 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 17:14:54,433 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 17:14:54,433 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 17:14:54,433 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 17:14:54,433 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 17:14:54,433 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 17:14:54,434 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 17:14:54,434 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 17:14:54,434 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 17:14:54,434 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 17:14:54,434 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 17:14:54,435 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 17:14:54,435 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 17:14:54,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 17:14:54,435 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 17:14:54,435 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 17:14:54,464 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 17:14:54,476 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 17:14:54,479 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 17:14:54,481 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 17:14:54,481 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 17:14:54,482 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label55.c [2019-10-02 17:14:54,552 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/572ee19fc/8db73eb6ce0c47a9b9ff18d18d8f516b/FLAG3a52f8d8d [2019-10-02 17:14:55,130 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 17:14:55,132 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label55.c [2019-10-02 17:14:55,149 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/572ee19fc/8db73eb6ce0c47a9b9ff18d18d8f516b/FLAG3a52f8d8d [2019-10-02 17:14:55,392 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/572ee19fc/8db73eb6ce0c47a9b9ff18d18d8f516b [2019-10-02 17:14:55,404 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 17:14:55,405 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 17:14:55,406 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 17:14:55,407 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 17:14:55,410 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 17:14:55,411 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 05:14:55" (1/1) ... [2019-10-02 17:14:55,414 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ed5a493 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:14:55, skipping insertion in model container [2019-10-02 17:14:55,414 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 05:14:55" (1/1) ... [2019-10-02 17:14:55,422 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 17:14:55,483 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 17:14:56,011 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 17:14:56,017 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 17:14:56,157 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 17:14:56,175 INFO L192 MainTranslator]: Completed translation [2019-10-02 17:14:56,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:14:56 WrapperNode [2019-10-02 17:14:56,176 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 17:14:56,176 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 17:14:56,177 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 17:14:56,177 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 17:14:56,189 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:14:56" (1/1) ... [2019-10-02 17:14:56,190 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:14:56" (1/1) ... [2019-10-02 17:14:56,207 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:14:56" (1/1) ... [2019-10-02 17:14:56,208 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:14:56" (1/1) ... [2019-10-02 17:14:56,252 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:14:56" (1/1) ... [2019-10-02 17:14:56,274 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:14:56" (1/1) ... [2019-10-02 17:14:56,287 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:14:56" (1/1) ... [2019-10-02 17:14:56,297 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 17:14:56,298 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 17:14:56,298 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 17:14:56,298 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 17:14:56,299 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:14:56" (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 17:14:56,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 17:14:56,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 17:14:56,356 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 17:14:56,356 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 17:14:56,356 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 17:14:56,356 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 17:14:56,356 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 17:14:56,356 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 17:14:56,356 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 17:14:56,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 17:14:56,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 17:14:57,613 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 17:14:57,613 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 17:14:57,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 05:14:57 BoogieIcfgContainer [2019-10-02 17:14:57,616 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 17:14:57,617 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 17:14:57,617 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 17:14:57,621 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 17:14:57,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 05:14:55" (1/3) ... [2019-10-02 17:14:57,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71153d83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 05:14:57, skipping insertion in model container [2019-10-02 17:14:57,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:14:56" (2/3) ... [2019-10-02 17:14:57,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71153d83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 05:14:57, skipping insertion in model container [2019-10-02 17:14:57,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 05:14:57" (3/3) ... [2019-10-02 17:14:57,625 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label55.c [2019-10-02 17:14:57,637 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 17:14:57,648 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 17:14:57,669 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 17:14:57,703 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 17:14:57,703 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 17:14:57,704 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 17:14:57,704 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 17:14:57,704 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 17:14:57,704 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 17:14:57,705 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 17:14:57,705 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 17:14:57,731 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-10-02 17:14:57,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-10-02 17:14:57,750 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 17:14:57,752 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:14:57,754 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 17:14:57,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 17:14:57,762 INFO L82 PathProgramCache]: Analyzing trace with hash -462333177, now seen corresponding path program 1 times [2019-10-02 17:14:57,766 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 17:14:57,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:14:57,829 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 17:14:57,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:14:57,830 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 17:14:58,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 17:14:58,325 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 17:14:58,328 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 17:14:58,328 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 17:14:58,329 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 17:14:58,343 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 17:14:58,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 17:14:58,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 17:14:58,368 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 3 states. [2019-10-02 17:14:59,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 17:14:59,378 INFO L93 Difference]: Finished difference Result 346 states and 515 transitions. [2019-10-02 17:14:59,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 17:14:59,380 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 117 [2019-10-02 17:14:59,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 17:14:59,409 INFO L225 Difference]: With dead ends: 346 [2019-10-02 17:14:59,409 INFO L226 Difference]: Without dead ends: 278 [2019-10-02 17:14:59,412 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 17:14:59,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-10-02 17:14:59,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2019-10-02 17:14:59,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-10-02 17:14:59,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 406 transitions. [2019-10-02 17:14:59,487 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 406 transitions. Word has length 117 [2019-10-02 17:14:59,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 17:14:59,488 INFO L475 AbstractCegarLoop]: Abstraction has 278 states and 406 transitions. [2019-10-02 17:14:59,489 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 17:14:59,489 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 406 transitions. [2019-10-02 17:14:59,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-02 17:14:59,493 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 17:14:59,493 INFO L411 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 17:14:59,494 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 17:14:59,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 17:14:59,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1604702730, now seen corresponding path program 1 times [2019-10-02 17:14:59,494 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 17:14:59,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:14:59,496 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 17:14:59,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:14:59,497 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 17:14:59,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 17:14:59,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 17:14:59,602 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 17:14:59,603 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-02 17:14:59,603 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 17:14:59,605 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-02 17:14:59,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-02 17:14:59,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-02 17:14:59,606 INFO L87 Difference]: Start difference. First operand 278 states and 406 transitions. Second operand 5 states. [2019-10-02 17:15:00,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 17:15:00,446 INFO L93 Difference]: Finished difference Result 568 states and 809 transitions. [2019-10-02 17:15:00,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 17:15:00,447 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 126 [2019-10-02 17:15:00,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 17:15:00,454 INFO L225 Difference]: With dead ends: 568 [2019-10-02 17:15:00,454 INFO L226 Difference]: Without dead ends: 568 [2019-10-02 17:15:00,455 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-02 17:15:00,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2019-10-02 17:15:00,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 558. [2019-10-02 17:15:00,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2019-10-02 17:15:00,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 788 transitions. [2019-10-02 17:15:00,519 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 788 transitions. Word has length 126 [2019-10-02 17:15:00,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 17:15:00,520 INFO L475 AbstractCegarLoop]: Abstraction has 558 states and 788 transitions. [2019-10-02 17:15:00,520 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-02 17:15:00,520 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 788 transitions. [2019-10-02 17:15:00,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-10-02 17:15:00,524 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 17:15:00,525 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2019-10-02 17:15:00,525 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 17:15:00,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 17:15:00,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1555807011, now seen corresponding path program 1 times [2019-10-02 17:15:00,526 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 17:15:00,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:15:00,527 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 17:15:00,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:15:00,528 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 17:15:00,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 17:15:00,636 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 17:15:00,636 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 17:15:00,636 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 17:15:00,637 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 138 with the following transitions: [2019-10-02 17:15:00,640 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [6], [9], [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], [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], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [457], [465], [473], [481], [489], [497], [505], [513], [521], [529], [537], [545], [553], [561], [569], [577], [581], [583], [757], [761], [770], [774], [776], [781], [782], [783], [785], [786] [2019-10-02 17:15:00,690 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 17:15:00,691 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)