/usr/bin/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label32.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:55:11,403 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:55:11,406 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:55:11,424 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:55:11,442 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:55:11,443 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:55:11,444 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:55:11,445 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:55:11,445 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:55:11,446 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:55:11,448 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:55:11,449 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:55:11,451 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:55:11,452 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:55:11,453 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:55:11,453 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:55:11,455 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:55:11,462 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:55:11,463 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:55:11,464 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:55:11,465 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 22:55:11,479 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:55:11,480 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:55:11,481 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:55:11,481 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:55:11,481 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:55:11,481 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:55:11,482 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:55:11,482 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:55:11,482 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:55:11,482 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:55:11,482 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:55:11,482 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:55:11,483 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:55:11,483 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:55:11,483 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:55:11,483 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:55:11,483 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:55:11,484 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:55:11,484 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:55:11,484 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:55:11,484 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:55:11,484 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:55:11,485 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:55:11,485 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:55:11,485 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:55:11,485 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:55:11,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:55:11,486 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:55:11,486 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-11-06 22:55:11,776 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:55:11,793 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:55:11,798 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:55:11,799 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:55:11,800 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:55:11,801 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label32.c [2019-11-06 22:55:11,877 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67a2f118b/99792851907748a69bba1ffce3f39df5/FLAG360906e2e [2019-11-06 22:55:12,600 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:55:12,601 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label32.c [2019-11-06 22:55:12,624 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67a2f118b/99792851907748a69bba1ffce3f39df5/FLAG360906e2e [2019-11-06 22:55:12,670 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67a2f118b/99792851907748a69bba1ffce3f39df5 [2019-11-06 22:55:12,678 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:55:12,680 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:55:12,680 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:55:12,681 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:55:12,684 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:55:12,685 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:55:12" (1/1) ... [2019-11-06 22:55:12,688 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d80ea1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:12, skipping insertion in model container [2019-11-06 22:55:12,688 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:55:12" (1/1) ... [2019-11-06 22:55:12,696 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:55:12,773 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:55:13,607 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:55:13,614 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:55:13,870 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:55:13,891 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:55:13,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:13 WrapperNode [2019-11-06 22:55:13,892 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:55:13,892 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:55:13,893 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:55:13,893 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:55:13,907 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:13" (1/1) ... [2019-11-06 22:55:13,908 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:13" (1/1) ... [2019-11-06 22:55:13,948 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:13" (1/1) ... [2019-11-06 22:55:13,948 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:13" (1/1) ... [2019-11-06 22:55:14,017 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:13" (1/1) ... [2019-11-06 22:55:14,039 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:13" (1/1) ... [2019-11-06 22:55:14,054 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:13" (1/1) ... [2019-11-06 22:55:14,069 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:55:14,070 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:55:14,070 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:55:14,070 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:55:14,071 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:13" (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 [2019-11-06 22:55:14,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:55:14,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:55:14,145 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:55:14,145 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:55:14,145 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:55:14,145 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:55:14,145 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:55:14,146 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:55:14,146 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:55:14,146 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:55:14,146 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:55:14,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:55:14,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:55:16,396 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:55:16,396 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:55:16,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:55:16 BoogieIcfgContainer [2019-11-06 22:55:16,398 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:55:16,402 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:55:16,402 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:55:16,405 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:55:16,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:55:12" (1/3) ... [2019-11-06 22:55:16,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d81f754 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:55:16, skipping insertion in model container [2019-11-06 22:55:16,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:13" (2/3) ... [2019-11-06 22:55:16,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d81f754 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:55:16, skipping insertion in model container [2019-11-06 22:55:16,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:55:16" (3/3) ... [2019-11-06 22:55:16,414 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label32.c [2019-11-06 22:55:16,430 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:55:16,446 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:55:16,458 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:55:16,501 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:55:16,502 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:55:16,502 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:55:16,502 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:55:16,502 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:55:16,502 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:55:16,503 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:55:16,503 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:55:16,540 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-11-06 22:55:16,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-06 22:55:16,550 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:55:16,551 INFO L410 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] [2019-11-06 22:55:16,553 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:55:16,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:16,559 INFO L82 PathProgramCache]: Analyzing trace with hash -808797987, now seen corresponding path program 1 times [2019-11-06 22:55:16,569 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:55:16,570 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124314179] [2019-11-06 22:55:16,571 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:55:16,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:16,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:55:16,879 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124314179] [2019-11-06 22:55:16,880 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:55:16,880 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:55:16,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753451026] [2019-11-06 22:55:16,886 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:55:16,888 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:55:16,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:55:16,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:55:16,905 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 3 states. [2019-11-06 22:55:19,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:55:19,168 INFO L93 Difference]: Finished difference Result 1153 states and 2141 transitions. [2019-11-06 22:55:19,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:55:19,169 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2019-11-06 22:55:19,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:55:19,200 INFO L225 Difference]: With dead ends: 1153 [2019-11-06 22:55:19,200 INFO L226 Difference]: Without dead ends: 682 [2019-11-06 22:55:19,211 INFO L630 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 [2019-11-06 22:55:19,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-11-06 22:55:19,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-11-06 22:55:19,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-11-06 22:55:19,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1184 transitions. [2019-11-06 22:55:19,315 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1184 transitions. Word has length 54 [2019-11-06 22:55:19,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:55:19,316 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1184 transitions. [2019-11-06 22:55:19,317 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:55:19,318 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1184 transitions. [2019-11-06 22:55:19,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-06 22:55:19,330 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:55:19,331 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 22:55:19,331 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:55:19,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:19,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1409214545, now seen corresponding path program 1 times [2019-11-06 22:55:19,332 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:55:19,333 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758550196] [2019-11-06 22:55:19,333 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:55:19,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:19,523 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:55:19,524 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758550196] [2019-11-06 22:55:19,524 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:55:19,524 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:55:19,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635843489] [2019-11-06 22:55:19,526 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:55:19,527 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:55:19,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:55:19,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:55:19,528 INFO L87 Difference]: Start difference. First operand 682 states and 1184 transitions. Second operand 5 states. [2019-11-06 22:55:22,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:55:22,363 INFO L93 Difference]: Finished difference Result 2066 states and 3624 transitions. [2019-11-06 22:55:22,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:55:22,364 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 123 [2019-11-06 22:55:22,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:55:22,376 INFO L225 Difference]: With dead ends: 2066 [2019-11-06 22:55:22,376 INFO L226 Difference]: Without dead ends: 1390 [2019-11-06 22:55:22,379 INFO L630 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 [2019-11-06 22:55:22,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2019-11-06 22:55:22,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 1372. [2019-11-06 22:55:22,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1372 states. [2019-11-06 22:55:22,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 2268 transitions. [2019-11-06 22:55:22,471 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 2268 transitions. Word has length 123 [2019-11-06 22:55:22,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:55:22,472 INFO L462 AbstractCegarLoop]: Abstraction has 1372 states and 2268 transitions. [2019-11-06 22:55:22,472 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:55:22,472 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 2268 transitions. [2019-11-06 22:55:22,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-11-06 22:55:22,475 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:55:22,475 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 22:55:22,476 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:55:22,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:22,476 INFO L82 PathProgramCache]: Analyzing trace with hash -102275548, now seen corresponding path program 1 times [2019-11-06 22:55:22,476 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:55:22,477 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074362216] [2019-11-06 22:55:22,477 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:55:22,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:22,715 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:55:22,716 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074362216] [2019-11-06 22:55:22,716 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:55:22,716 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:55:22,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888836038] [2019-11-06 22:55:22,717 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:55:22,718 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:55:22,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:55:22,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:55:22,718 INFO L87 Difference]: Start difference. First operand 1372 states and 2268 transitions. Second operand 6 states. [2019-11-06 22:55:25,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:55:25,544 INFO L93 Difference]: Finished difference Result 3472 states and 5791 transitions. [2019-11-06 22:55:25,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:55:25,544 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 152 [2019-11-06 22:55:25,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:55:25,561 INFO L225 Difference]: With dead ends: 3472 [2019-11-06 22:55:25,561 INFO L226 Difference]: Without dead ends: 2106 [2019-11-06 22:55:25,566 INFO L630 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 [2019-11-06 22:55:25,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2019-11-06 22:55:25,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 2081. [2019-11-06 22:55:25,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2081 states. [2019-11-06 22:55:25,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 3263 transitions. [2019-11-06 22:55:25,657 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 3263 transitions. Word has length 152 [2019-11-06 22:55:25,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:55:25,659 INFO L462 AbstractCegarLoop]: Abstraction has 2081 states and 3263 transitions. [2019-11-06 22:55:25,660 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:55:25,660 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 3263 transitions. [2019-11-06 22:55:25,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-11-06 22:55:25,665 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:55:25,666 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 22:55:25,666 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:55:25,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:25,667 INFO L82 PathProgramCache]: Analyzing trace with hash 2025156256, now seen corresponding path program 1 times [2019-11-06 22:55:25,667 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:55:25,668 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861894451] [2019-11-06 22:55:25,668 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:55:25,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:25,877 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:55:25,878 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861894451] [2019-11-06 22:55:25,878 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:55:25,878 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:55:25,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044263985] [2019-11-06 22:55:25,879 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:55:25,880 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:55:25,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:55:25,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:55:25,881 INFO L87 Difference]: Start difference. First operand 2081 states and 3263 transitions. Second operand 6 states. [2019-11-06 22:55:28,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:55:28,361 INFO L93 Difference]: Finished difference Result 5241 states and 8253 transitions. [2019-11-06 22:55:28,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:55:28,361 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 170 [2019-11-06 22:55:28,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:55:28,383 INFO L225 Difference]: With dead ends: 5241 [2019-11-06 22:55:28,383 INFO L226 Difference]: Without dead ends: 3166 [2019-11-06 22:55:28,390 INFO L630 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 [2019-11-06 22:55:28,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3166 states. [2019-11-06 22:55:28,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3166 to 3140. [2019-11-06 22:55:28,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3140 states. [2019-11-06 22:55:28,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3140 states to 3140 states and 4128 transitions. [2019-11-06 22:55:28,485 INFO L78 Accepts]: Start accepts. Automaton has 3140 states and 4128 transitions. Word has length 170 [2019-11-06 22:55:28,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:55:28,486 INFO L462 AbstractCegarLoop]: Abstraction has 3140 states and 4128 transitions. [2019-11-06 22:55:28,486 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:55:28,486 INFO L276 IsEmpty]: Start isEmpty. Operand 3140 states and 4128 transitions. [2019-11-06 22:55:28,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2019-11-06 22:55:28,490 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:55:28,491 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:55:28,491 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:55:28,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:28,492 INFO L82 PathProgramCache]: Analyzing trace with hash -925564779, now seen corresponding path program 1 times [2019-11-06 22:55:28,492 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:55:28,493 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379597218] [2019-11-06 22:55:28,493 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:55:28,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:28,837 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 113 proven. 46 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:55:28,838 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379597218] [2019-11-06 22:55:28,838 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529604573] [2019-11-06 22:55:28,838 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:55:28,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:28,969 INFO L256 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:55:28,985 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:55:29,122 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-06 22:55:29,123 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:55:29,228 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-06 22:55:29,228 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:55:29,228 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2019-11-06 22:55:29,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052947204] [2019-11-06 22:55:29,231 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:55:29,232 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:55:29,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:55:29,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:55:29,232 INFO L87 Difference]: Start difference. First operand 3140 states and 4128 transitions. Second operand 4 states. [2019-11-06 22:55:32,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:55:32,073 INFO L93 Difference]: Finished difference Result 7976 states and 10525 transitions. [2019-11-06 22:55:32,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:55:32,080 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 252 [2019-11-06 22:55:32,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:55:32,102 INFO L225 Difference]: With dead ends: 7976 [2019-11-06 22:55:32,102 INFO L226 Difference]: Without dead ends: 4842 [2019-11-06 22:55:32,113 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 505 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:55:32,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4842 states. [2019-11-06 22:55:32,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4842 to 4501. [2019-11-06 22:55:32,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4501 states. [2019-11-06 22:55:32,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4501 states to 4501 states and 5661 transitions. [2019-11-06 22:55:32,248 INFO L78 Accepts]: Start accepts. Automaton has 4501 states and 5661 transitions. Word has length 252 [2019-11-06 22:55:32,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:55:32,249 INFO L462 AbstractCegarLoop]: Abstraction has 4501 states and 5661 transitions. [2019-11-06 22:55:32,249 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:55:32,249 INFO L276 IsEmpty]: Start isEmpty. Operand 4501 states and 5661 transitions. [2019-11-06 22:55:32,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2019-11-06 22:55:32,262 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:55:32,263 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-11-06 22:55:32,467 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:55:32,467 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:55:32,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:32,468 INFO L82 PathProgramCache]: Analyzing trace with hash -538670075, now seen corresponding path program 1 times [2019-11-06 22:55:32,468 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:55:32,468 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399250699] [2019-11-06 22:55:32,468 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:55:32,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:32,973 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 258 proven. 115 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2019-11-06 22:55:32,973 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399250699] [2019-11-06 22:55:32,974 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060168973] [2019-11-06 22:55:32,974 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:55:33,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:33,158 INFO L256 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:55:33,186 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:55:33,436 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 450 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-11-06 22:55:33,436 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:55:33,760 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 258 proven. 115 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2019-11-06 22:55:33,761 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [682549545] [2019-11-06 22:55:33,770 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 472 [2019-11-06 22:55:33,871 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:55:33,872 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-11-06 22:55:45,048 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-11-06 22:55:45,050 INFO L272 AbstractInterpreter]: Visited 179 different actions 179 times. Never merged. Never widened. Performed 350 root evaluator evaluations with a maximum evaluation depth of 14. Performed 350 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Never found a fixpoint. Largest state had 24 variables. [2019-11-06 22:55:45,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:45,054 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates