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_label52.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 17:00:36,728 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 17:00:36,730 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 17:00:36,746 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-02 17:00:36,768 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 17:00:36,769 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 17:00:36,771 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 17:00:36,772 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 17:00:36,774 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 17:00:36,775 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 17:00:36,777 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 17:00:36,783 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 17:00:36,787 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 17:00:36,788 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 17:00:36,791 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 17:00:36,792 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 17:00:36,794 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 17:00:36,806 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 17:00:36,841 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 17:00:36,844 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 17:00:36,845 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 17:00:36,845 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 17:00:36,846 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 17:00:36,846 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 17:00:36,846 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 17:00:36,846 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 17:00:36,846 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 17:00:36,846 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 17:00:36,847 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 17:00:36,847 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 17:00:36,847 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 17:00:36,848 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 17:00:36,848 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 17:00:36,848 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 17:00:36,848 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 17:00:36,848 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 17:00:36,848 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 17:00:36,849 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 17:00:36,849 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 17:00:36,849 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 17:00:36,849 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 17:00:36,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 17:00:36,850 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 17:00:36,850 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 17:00:36,850 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 17:00:36,850 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 17:00:36,850 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 17:00:36,851 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 17:00:36,886 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 17:00:36,902 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 17:00:36,906 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 17:00:36,908 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 17:00:36,908 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 17:00:36,909 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label52.c [2019-10-02 17:00:36,969 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4967a8212/f61907dc53f4401eb8e19fbb37b0d396/FLAGc54ee948c [2019-10-02 17:00:37,534 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 17:00:37,535 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label52.c [2019-10-02 17:00:37,549 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4967a8212/f61907dc53f4401eb8e19fbb37b0d396/FLAGc54ee948c [2019-10-02 17:00:37,798 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4967a8212/f61907dc53f4401eb8e19fbb37b0d396 [2019-10-02 17:00:37,808 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 17:00:37,810 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 17:00:37,812 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 17:00:37,812 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 17:00:37,816 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 17:00:37,817 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 05:00:37" (1/1) ... [2019-10-02 17:00:37,820 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26e611eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:00:37, skipping insertion in model container [2019-10-02 17:00:37,820 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 05:00:37" (1/1) ... [2019-10-02 17:00:37,827 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 17:00:37,885 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 17:00:38,345 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 17:00:38,353 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 17:00:38,462 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 17:00:38,484 INFO L192 MainTranslator]: Completed translation [2019-10-02 17:00:38,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:00:38 WrapperNode [2019-10-02 17:00:38,485 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 17:00:38,485 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 17:00:38,486 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 17:00:38,486 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 17:00:38,498 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:00:38" (1/1) ... [2019-10-02 17:00:38,498 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:00:38" (1/1) ... [2019-10-02 17:00:38,524 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:00:38" (1/1) ... [2019-10-02 17:00:38,525 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:00:38" (1/1) ... [2019-10-02 17:00:38,571 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:00:38" (1/1) ... [2019-10-02 17:00:38,581 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:00:38" (1/1) ... [2019-10-02 17:00:38,586 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:00:38" (1/1) ... [2019-10-02 17:00:38,593 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 17:00:38,593 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 17:00:38,593 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 17:00:38,593 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 17:00:38,594 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:00:38" (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 17:00:38,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 17:00:38,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 17:00:38,649 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 17:00:38,649 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 17:00:38,649 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 17:00:38,649 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 17:00:38,649 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 17:00:38,649 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 17:00:38,649 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 17:00:38,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 17:00:38,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 17:00:39,802 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 17:00:39,802 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 17:00:39,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 05:00:39 BoogieIcfgContainer [2019-10-02 17:00:39,804 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 17:00:39,805 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 17:00:39,805 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 17:00:39,809 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 17:00:39,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 05:00:37" (1/3) ... [2019-10-02 17:00:39,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@779fc619 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 05:00:39, skipping insertion in model container [2019-10-02 17:00:39,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:00:38" (2/3) ... [2019-10-02 17:00:39,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@779fc619 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 05:00:39, skipping insertion in model container [2019-10-02 17:00:39,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 05:00:39" (3/3) ... [2019-10-02 17:00:39,812 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label52.c [2019-10-02 17:00:39,824 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 17:00:39,833 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 17:00:39,851 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 17:00:39,881 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 17:00:39,882 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 17:00:39,882 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 17:00:39,882 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 17:00:39,882 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 17:00:39,882 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 17:00:39,883 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 17:00:39,883 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 17:00:39,906 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-10-02 17:00:39,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-02 17:00:39,926 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 17:00:39,927 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 17:00:39,929 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 17:00:39,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 17:00:39,934 INFO L82 PathProgramCache]: Analyzing trace with hash -421627906, now seen corresponding path program 1 times [2019-10-02 17:00:39,935 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 17:00:39,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:00:39,983 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 17:00:39,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:00:39,983 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 17:00:40,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 17:00:40,439 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 17:00:40,442 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 17:00:40,442 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 17:00:40,443 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 17:00:40,453 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 17:00:40,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 17:00:40,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 17:00:40,475 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 3 states. [2019-10-02 17:00:41,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 17:00:41,396 INFO L93 Difference]: Finished difference Result 346 states and 515 transitions. [2019-10-02 17:00:41,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 17:00:41,401 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 132 [2019-10-02 17:00:41,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 17:00:41,435 INFO L225 Difference]: With dead ends: 346 [2019-10-02 17:00:41,435 INFO L226 Difference]: Without dead ends: 278 [2019-10-02 17:00:41,438 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 17:00:41,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-10-02 17:00:41,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2019-10-02 17:00:41,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-10-02 17:00:41,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 406 transitions. [2019-10-02 17:00:41,554 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 406 transitions. Word has length 132 [2019-10-02 17:00:41,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 17:00:41,557 INFO L475 AbstractCegarLoop]: Abstraction has 278 states and 406 transitions. [2019-10-02 17:00:41,558 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 17:00:41,558 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 406 transitions. [2019-10-02 17:00:41,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-02 17:00:41,567 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 17:00:41,567 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 17:00:41,567 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 17:00:41,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 17:00:41,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1878869349, now seen corresponding path program 1 times [2019-10-02 17:00:41,568 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 17:00:41,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:00:41,570 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 17:00:41,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:00:41,570 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 17:00:41,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 17:00:41,698 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 17:00:41,698 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 17:00:41,698 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-02 17:00:41,699 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 17:00:41,701 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-02 17:00:41,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-02 17:00:41,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-02 17:00:41,703 INFO L87 Difference]: Start difference. First operand 278 states and 406 transitions. Second operand 5 states. [2019-10-02 17:00:42,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 17:00:42,457 INFO L93 Difference]: Finished difference Result 568 states and 809 transitions. [2019-10-02 17:00:42,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 17:00:42,458 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 141 [2019-10-02 17:00:42,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 17:00:42,464 INFO L225 Difference]: With dead ends: 568 [2019-10-02 17:00:42,464 INFO L226 Difference]: Without dead ends: 568 [2019-10-02 17:00:42,465 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 17:00:42,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2019-10-02 17:00:42,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 558. [2019-10-02 17:00:42,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2019-10-02 17:00:42,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 788 transitions. [2019-10-02 17:00:42,503 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 788 transitions. Word has length 141 [2019-10-02 17:00:42,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 17:00:42,504 INFO L475 AbstractCegarLoop]: Abstraction has 558 states and 788 transitions. [2019-10-02 17:00:42,504 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-02 17:00:42,504 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 788 transitions. [2019-10-02 17:00:42,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-02 17:00:42,507 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 17:00:42,508 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 17:00:42,508 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 17:00:42,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 17:00:42,508 INFO L82 PathProgramCache]: Analyzing trace with hash -260285342, now seen corresponding path program 1 times [2019-10-02 17:00:42,509 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 17:00:42,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:00:42,510 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 17:00:42,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:00:42,510 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 17:00:42,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 17:00:42,605 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 17:00:42,606 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 17:00:42,606 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 17:00:42,607 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 153 with the following transitions: [2019-10-02 17:00:42,609 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], [585], [593], [601], [609], [617], [625], [633], [641], [649], [657], [665], [673], [681], [689], [697], [701], [703], [757], [761], [770], [774], [776], [781], [782], [783], [785], [786] [2019-10-02 17:00:42,716 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 17:00:42,716 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)