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_label28.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 16:45:29,470 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 16:45:29,472 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 16:45:29,485 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-02 16:45:29,495 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 16:45:29,496 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 16:45:29,497 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 16:45:29,498 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 16:45:29,499 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 16:45:29,500 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 16:45:29,502 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 16:45:29,504 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 16:45:29,506 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 16:45:29,507 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 16:45:29,508 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 16:45:29,509 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 16:45:29,511 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 16:45:29,515 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-02 16:45:29,516 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-02 16:45:29,517 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-02 16:45:29,518 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-02 16:45:29,519 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-02 16:45:29,519 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-02 16:45:29,520 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-02 16:45:29,520 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-02 16:45:29,520 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 16:45:29,521 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 16:45:29,522 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 16:45:29,523 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 16:45:29,539 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 16:45:29,539 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 16:45:29,540 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 16:45:29,540 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 16:45:29,540 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 16:45:29,541 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 16:45:29,541 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 16:45:29,541 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 16:45:29,541 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 16:45:29,542 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 16:45:29,542 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 16:45:29,543 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 16:45:29,543 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 16:45:29,543 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 16:45:29,543 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 16:45:29,543 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 16:45:29,544 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 16:45:29,544 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 16:45:29,544 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 16:45:29,544 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 16:45:29,545 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 16:45:29,545 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 16:45:29,545 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 16:45:29,545 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 16:45:29,545 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 16:45:29,546 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 16:45:29,546 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 16:45:29,546 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 16:45:29,546 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 16:45:29,546 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 16:45:29,580 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 16:45:29,592 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 16:45:29,596 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 16:45:29,597 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 16:45:29,598 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 16:45:29,599 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label28.c [2019-10-02 16:45:29,685 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f8550a05/bea6d5fd4de343b88330ea30b678e836/FLAG30bc77e64 [2019-10-02 16:45:30,341 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 16:45:30,342 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label28.c [2019-10-02 16:45:30,356 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f8550a05/bea6d5fd4de343b88330ea30b678e836/FLAG30bc77e64 [2019-10-02 16:45:30,572 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f8550a05/bea6d5fd4de343b88330ea30b678e836 [2019-10-02 16:45:30,582 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 16:45:30,584 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 16:45:30,585 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 16:45:30,586 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 16:45:30,590 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 16:45:30,591 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 04:45:30" (1/1) ... [2019-10-02 16:45:30,594 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@193b1bbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:45:30, skipping insertion in model container [2019-10-02 16:45:30,595 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 04:45:30" (1/1) ... [2019-10-02 16:45:30,603 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 16:45:30,672 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 16:45:31,264 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 16:45:31,274 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 16:45:31,365 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 16:45:31,385 INFO L192 MainTranslator]: Completed translation [2019-10-02 16:45:31,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:45:31 WrapperNode [2019-10-02 16:45:31,386 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 16:45:31,387 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 16:45:31,387 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 16:45:31,387 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 16:45:31,400 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:45:31" (1/1) ... [2019-10-02 16:45:31,400 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:45:31" (1/1) ... [2019-10-02 16:45:31,428 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:45:31" (1/1) ... [2019-10-02 16:45:31,429 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:45:31" (1/1) ... [2019-10-02 16:45:31,475 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:45:31" (1/1) ... [2019-10-02 16:45:31,488 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:45:31" (1/1) ... [2019-10-02 16:45:31,495 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:45:31" (1/1) ... [2019-10-02 16:45:31,505 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 16:45:31,506 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 16:45:31,506 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 16:45:31,506 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 16:45:31,507 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:45:31" (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 16:45:31,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 16:45:31,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 16:45:31,559 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 16:45:31,559 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 16:45:31,559 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 16:45:31,559 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 16:45:31,559 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 16:45:31,559 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 16:45:31,560 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 16:45:31,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 16:45:31,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 16:45:32,853 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 16:45:32,853 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 16:45:32,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 04:45:32 BoogieIcfgContainer [2019-10-02 16:45:32,855 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 16:45:32,856 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 16:45:32,856 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 16:45:32,860 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 16:45:32,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 04:45:30" (1/3) ... [2019-10-02 16:45:32,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@323f9bbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 04:45:32, skipping insertion in model container [2019-10-02 16:45:32,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 04:45:31" (2/3) ... [2019-10-02 16:45:32,862 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@323f9bbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 04:45:32, skipping insertion in model container [2019-10-02 16:45:32,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 04:45:32" (3/3) ... [2019-10-02 16:45:32,864 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label28.c [2019-10-02 16:45:32,875 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 16:45:32,884 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 16:45:32,902 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 16:45:32,931 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 16:45:32,932 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 16:45:32,932 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 16:45:32,932 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 16:45:32,932 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 16:45:32,932 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 16:45:32,933 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 16:45:32,933 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 16:45:32,955 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-10-02 16:45:32,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-10-02 16:45:32,969 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 16:45:32,970 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] [2019-10-02 16:45:32,972 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 16:45:32,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 16:45:32,977 INFO L82 PathProgramCache]: Analyzing trace with hash -199989281, now seen corresponding path program 1 times [2019-10-02 16:45:32,980 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 16:45:33,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:45:33,035 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 16:45:33,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:45:33,035 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 16:45:33,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 16:45:33,575 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 16:45:33,578 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 16:45:33,578 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 16:45:33,578 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 16:45:33,590 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 16:45:33,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 16:45:33,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 16:45:33,610 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 4 states. [2019-10-02 16:45:34,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 16:45:34,899 INFO L93 Difference]: Finished difference Result 497 states and 751 transitions. [2019-10-02 16:45:34,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 16:45:34,901 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 99 [2019-10-02 16:45:34,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 16:45:34,920 INFO L225 Difference]: With dead ends: 497 [2019-10-02 16:45:34,921 INFO L226 Difference]: Without dead ends: 413 [2019-10-02 16:45:34,924 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 16:45:34,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2019-10-02 16:45:35,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 278. [2019-10-02 16:45:35,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-10-02 16:45:35,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 400 transitions. [2019-10-02 16:45:35,010 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 400 transitions. Word has length 99 [2019-10-02 16:45:35,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 16:45:35,011 INFO L475 AbstractCegarLoop]: Abstraction has 278 states and 400 transitions. [2019-10-02 16:45:35,011 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 16:45:35,013 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 400 transitions. [2019-10-02 16:45:35,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-10-02 16:45:35,021 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 16:45:35,021 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] [2019-10-02 16:45:35,021 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 16:45:35,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 16:45:35,024 INFO L82 PathProgramCache]: Analyzing trace with hash 732624616, now seen corresponding path program 1 times [2019-10-02 16:45:35,024 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 16:45:35,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:45:35,027 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 16:45:35,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:45:35,027 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 16:45:35,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 16:45:35,184 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 16:45:35,185 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 16:45:35,185 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 16:45:35,185 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 16:45:35,190 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 16:45:35,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 16:45:35,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 16:45:35,191 INFO L87 Difference]: Start difference. First operand 278 states and 400 transitions. Second operand 6 states. [2019-10-02 16:45:36,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 16:45:36,023 INFO L93 Difference]: Finished difference Result 568 states and 828 transitions. [2019-10-02 16:45:36,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 16:45:36,025 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 109 [2019-10-02 16:45:36,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 16:45:36,030 INFO L225 Difference]: With dead ends: 568 [2019-10-02 16:45:36,030 INFO L226 Difference]: Without dead ends: 568 [2019-10-02 16:45:36,031 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 16:45:36,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2019-10-02 16:45:36,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 556. [2019-10-02 16:45:36,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2019-10-02 16:45:36,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 798 transitions. [2019-10-02 16:45:36,071 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 798 transitions. Word has length 109 [2019-10-02 16:45:36,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 16:45:36,071 INFO L475 AbstractCegarLoop]: Abstraction has 556 states and 798 transitions. [2019-10-02 16:45:36,071 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 16:45:36,071 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 798 transitions. [2019-10-02 16:45:36,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-10-02 16:45:36,076 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 16:45:36,077 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 16:45:36,077 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 16:45:36,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 16:45:36,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1967237378, now seen corresponding path program 1 times [2019-10-02 16:45:36,078 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 16:45:36,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:45:36,079 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 16:45:36,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:45:36,080 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 16:45:36,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 16:45:36,198 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 16:45:36,200 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 16:45:36,200 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 16:45:36,200 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 16:45:36,202 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 16:45:36,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 16:45:36,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 16:45:36,203 INFO L87 Difference]: Start difference. First operand 556 states and 798 transitions. Second operand 6 states. [2019-10-02 16:45:37,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 16:45:37,094 INFO L93 Difference]: Finished difference Result 987 states and 1418 transitions. [2019-10-02 16:45:37,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 16:45:37,095 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 122 [2019-10-02 16:45:37,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 16:45:37,101 INFO L225 Difference]: With dead ends: 987 [2019-10-02 16:45:37,102 INFO L226 Difference]: Without dead ends: 987 [2019-10-02 16:45:37,102 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 16:45:37,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2019-10-02 16:45:37,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 977. [2019-10-02 16:45:37,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 977 states. [2019-10-02 16:45:37,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 1387 transitions. [2019-10-02 16:45:37,153 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 1387 transitions. Word has length 122 [2019-10-02 16:45:37,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 16:45:37,153 INFO L475 AbstractCegarLoop]: Abstraction has 977 states and 1387 transitions. [2019-10-02 16:45:37,154 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 16:45:37,154 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 1387 transitions. [2019-10-02 16:45:37,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-02 16:45:37,159 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 16:45:37,159 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] [2019-10-02 16:45:37,159 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 16:45:37,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 16:45:37,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1893643415, now seen corresponding path program 1 times [2019-10-02 16:45:37,160 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 16:45:37,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:45:37,162 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 16:45:37,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 16:45:37,162 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 16:45:37,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 16:45:37,294 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 16:45:37,295 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 16:45:37,295 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 16:45:37,296 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 134 with the following transitions: [2019-10-02 16:45:37,298 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], [437], [439], [757], [761], [770], [774], [776], [781], [782], [783], [785], [786] [2019-10-02 16:45:37,343 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 16:45:37,344 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)