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_label07.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 16:30:41,982 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 16:30:41,984 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 16:30:41,996 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-02 16:30:42,006 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 16:30:42,007 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 16:30:42,008 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 16:30:42,009 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 16:30:42,010 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 16:30:42,010 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 16:30:42,012 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 16:30:42,014 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 16:30:42,015 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 16:30:42,016 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 16:30:42,017 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 16:30:42,018 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 16:30:42,020 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 16:30:42,023 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-02 16:30:42,024 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-02 16:30:42,024 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-02 16:30:42,025 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-02 16:30:42,026 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-02 16:30:42,026 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-02 16:30:42,027 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-02 16:30:42,027 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-02 16:30:42,027 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 16:30:42,028 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 16:30:42,029 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 16:30:42,030 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 16:30:42,044 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 16:30:42,044 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 16:30:42,044 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 16:30:42,045 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 16:30:42,045 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 16:30:42,046 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 16:30:42,046 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 16:30:42,046 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 16:30:42,046 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 16:30:42,046 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 16:30:42,047 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 16:30:42,047 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 16:30:42,047 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 16:30:42,048 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 16:30:42,048 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 16:30:42,048 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 16:30:42,048 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 16:30:42,048 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 16:30:42,049 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 16:30:42,049 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 16:30:42,049 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 16:30:42,049 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 16:30:42,049 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 16:30:42,050 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 16:30:42,050 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 16:30:42,050 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 16:30:42,050 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 16:30:42,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 16:30:42,051 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 16:30:42,051 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 16:30:42,079 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 16:30:42,093 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 16:30:42,098 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 16:30:42,099 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 16:30:42,100 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 16:30:42,102 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label07.c [2019-10-02 16:30:42,179 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a31b868eb/34cce0afd70d44619eea6169b47084e8/FLAGc9d77c812 [2019-10-02 16:30:42,790 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 16:30:42,791 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label07.c [2019-10-02 16:30:42,807 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a31b868eb/34cce0afd70d44619eea6169b47084e8/FLAGc9d77c812 [2019-10-02 16:30:43,009 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a31b868eb/34cce0afd70d44619eea6169b47084e8 [2019-10-02 16:30:43,022 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 16:30:43,025 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 16:30:43,026 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 16:30:43,026 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 16:30:43,030 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 16:30:43,031 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 04:30:43" (1/1) ... [2019-10-02 16:30:43,034 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@180dbcb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:30:43, skipping insertion in model container [2019-10-02 16:30:43,034 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 04:30:43" (1/1) ... [2019-10-02 16:30:43,042 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 16:30:43,098 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 16:30:43,711 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 16:30:43,725 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 16:30:43,852 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 16:30:43,874 INFO L192 MainTranslator]: Completed translation [2019-10-02 16:30:43,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:30:43 WrapperNode [2019-10-02 16:30:43,875 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 16:30:43,876 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 16:30:43,876 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 16:30:43,876 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 16:30:43,890 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:30:43" (1/1) ... [2019-10-02 16:30:43,893 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:30:43" (1/1) ... [2019-10-02 16:30:43,934 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:30:43" (1/1) ... [2019-10-02 16:30:43,939 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:30:43" (1/1) ... [2019-10-02 16:30:43,987 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:30:43" (1/1) ... [2019-10-02 16:30:44,006 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:30:43" (1/1) ... [2019-10-02 16:30:44,010 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:30:43" (1/1) ... [2019-10-02 16:30:44,017 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 16:30:44,018 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 16:30:44,018 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 16:30:44,018 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 16:30:44,019 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:30:43" (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 16:30:44,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 16:30:44,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 16:30:44,091 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 16:30:44,092 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 16:30:44,092 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 16:30:44,092 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 16:30:44,093 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 16:30:44,093 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 16:30:44,093 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 16:30:44,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 16:30:44,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 16:30:45,441 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 16:30:45,442 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 16:30:45,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 04:30:45 BoogieIcfgContainer [2019-10-02 16:30:45,445 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 16:30:45,447 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 16:30:45,447 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 16:30:45,450 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 16:30:45,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 04:30:43" (1/3) ... [2019-10-02 16:30:45,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ef08409 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 04:30:45, skipping insertion in model container [2019-10-02 16:30:45,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:30:43" (2/3) ... [2019-10-02 16:30:45,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ef08409 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 04:30:45, skipping insertion in model container [2019-10-02 16:30:45,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 04:30:45" (3/3) ... [2019-10-02 16:30:45,454 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label07.c [2019-10-02 16:30:45,465 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 16:30:45,476 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 16:30:45,494 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 16:30:45,527 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 16:30:45,528 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 16:30:45,528 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 16:30:45,528 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 16:30:45,528 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 16:30:45,529 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 16:30:45,529 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 16:30:45,529 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 16:30:45,551 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-10-02 16:30:45,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-02 16:30:45,567 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 16:30:45,568 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] [2019-10-02 16:30:45,570 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 16:30:45,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 16:30:45,577 INFO L82 PathProgramCache]: Analyzing trace with hash -897711290, now seen corresponding path program 1 times [2019-10-02 16:30:45,579 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 16:30:45,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:30:45,624 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 16:30:45,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:30:45,624 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 16:30:45,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 16:30:46,132 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 16:30:46,135 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 16:30:46,135 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 16:30:46,136 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 16:30:46,146 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 16:30:46,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 16:30:46,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 16:30:46,172 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 3 states. [2019-10-02 16:30:47,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 16:30:47,093 INFO L93 Difference]: Finished difference Result 346 states and 499 transitions. [2019-10-02 16:30:47,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 16:30:47,097 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 110 [2019-10-02 16:30:47,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 16:30:47,126 INFO L225 Difference]: With dead ends: 346 [2019-10-02 16:30:47,126 INFO L226 Difference]: Without dead ends: 278 [2019-10-02 16:30:47,129 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 3 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 16:30:47,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-10-02 16:30:47,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2019-10-02 16:30:47,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-10-02 16:30:47,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 394 transitions. [2019-10-02 16:30:47,241 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 394 transitions. Word has length 110 [2019-10-02 16:30:47,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 16:30:47,242 INFO L475 AbstractCegarLoop]: Abstraction has 278 states and 394 transitions. [2019-10-02 16:30:47,242 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 16:30:47,242 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 394 transitions. [2019-10-02 16:30:47,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-02 16:30:47,248 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 16:30:47,248 INFO L411 BasicCegarLoop]: trace histogram [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, 1] [2019-10-02 16:30:47,249 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 16:30:47,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 16:30:47,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1715018595, now seen corresponding path program 1 times [2019-10-02 16:30:47,249 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 16:30:47,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:30:47,251 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 16:30:47,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:30:47,251 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 16:30:47,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 16:30:47,386 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 16:30:47,387 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 16:30:47,387 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 16:30:47,387 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 16:30:47,389 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 16:30:47,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 16:30:47,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 16:30:47,390 INFO L87 Difference]: Start difference. First operand 278 states and 394 transitions. Second operand 6 states. [2019-10-02 16:30:48,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 16:30:48,228 INFO L93 Difference]: Finished difference Result 568 states and 813 transitions. [2019-10-02 16:30:48,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 16:30:48,231 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 120 [2019-10-02 16:30:48,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 16:30:48,238 INFO L225 Difference]: With dead ends: 568 [2019-10-02 16:30:48,238 INFO L226 Difference]: Without dead ends: 568 [2019-10-02 16:30:48,239 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 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 16:30:48,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2019-10-02 16:30:48,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 556. [2019-10-02 16:30:48,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2019-10-02 16:30:48,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 784 transitions. [2019-10-02 16:30:48,276 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 784 transitions. Word has length 120 [2019-10-02 16:30:48,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 16:30:48,276 INFO L475 AbstractCegarLoop]: Abstraction has 556 states and 784 transitions. [2019-10-02 16:30:48,276 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 16:30:48,277 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 784 transitions. [2019-10-02 16:30:48,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-10-02 16:30:48,290 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 16:30:48,290 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:30:48,290 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 16:30:48,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 16:30:48,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1875176562, now seen corresponding path program 1 times [2019-10-02 16:30:48,291 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 16:30:48,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:30:48,297 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 16:30:48,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:30:48,297 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 16:30:48,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 16:30:48,498 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 16:30:48,499 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 16:30:48,499 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 16:30:48,501 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 145 with the following transitions: [2019-10-02 16:30:48,504 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [6], [10], [14], [17], [18], [22], [26], [30], [34], [38], [42], [46], [50], [54], [58], [62], [65], [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], [525], [527], [757], [761], [770], [774], [776], [781], [782], [783], [785], [786] [2019-10-02 16:30:48,590 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 16:30:48,590 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)