/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/Problem01_label17.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:29:13,431 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:29:13,434 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:29:13,447 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:29:13,457 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:29:13,458 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:29:13,459 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:29:13,460 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:29:13,461 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:29:13,462 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:29:13,464 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:29:13,466 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:29:13,468 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:29:13,469 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:29:13,470 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:29:13,471 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:29:13,473 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:29:13,481 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:29:13,482 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:29:13,482 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:29:13,483 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 22:29:13,497 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:29:13,498 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:29:13,499 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:29:13,499 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:29:13,499 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:29:13,499 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:29:13,500 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:29:13,500 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:29:13,500 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:29:13,500 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:29:13,500 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:29:13,501 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:29:13,501 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:29:13,501 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:29:13,501 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:29:13,501 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:29:13,501 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:29:13,502 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:29:13,502 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:29:13,502 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:29:13,502 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:29:13,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:29:13,503 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:29:13,503 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:29:13,503 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:29:13,503 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:29:13,503 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:29:13,504 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:29:13,504 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 22:29:13,799 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:29:13,824 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:29:13,829 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:29:13,831 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:29:13,831 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:29:13,832 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label17.c [2019-11-06 22:29:13,905 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c0dd1c84/44939422280642188843be83ebb5ae25/FLAGe62e337dc [2019-11-06 22:29:14,461 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:29:14,462 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label17.c [2019-11-06 22:29:14,481 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c0dd1c84/44939422280642188843be83ebb5ae25/FLAGe62e337dc [2019-11-06 22:29:14,743 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c0dd1c84/44939422280642188843be83ebb5ae25 [2019-11-06 22:29:14,752 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:29:14,754 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:29:14,755 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:29:14,755 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:29:14,760 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:29:14,761 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:29:14" (1/1) ... [2019-11-06 22:29:14,764 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22fb272e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:14, skipping insertion in model container [2019-11-06 22:29:14,765 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:29:14" (1/1) ... [2019-11-06 22:29:14,772 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:29:14,823 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:29:15,323 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:29:15,329 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:29:15,480 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:29:15,496 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:29:15,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:15 WrapperNode [2019-11-06 22:29:15,497 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:29:15,497 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:29:15,498 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:29:15,498 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:29:15,510 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:15" (1/1) ... [2019-11-06 22:29:15,510 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:15" (1/1) ... [2019-11-06 22:29:15,528 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:15" (1/1) ... [2019-11-06 22:29:15,528 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:15" (1/1) ... [2019-11-06 22:29:15,569 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:15" (1/1) ... [2019-11-06 22:29:15,590 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:15" (1/1) ... [2019-11-06 22:29:15,597 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:15" (1/1) ... [2019-11-06 22:29:15,606 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:29:15,606 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:29:15,607 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:29:15,608 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:29:15,608 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:15" (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 22:29:15,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:29:15,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:29:15,666 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:29:15,666 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:29:15,667 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:29:15,667 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:29:15,667 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:29:15,667 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:29:15,667 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:29:15,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:29:15,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:29:16,807 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:29:16,807 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:29:16,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:29:16 BoogieIcfgContainer [2019-11-06 22:29:16,809 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:29:16,810 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:29:16,810 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:29:16,813 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:29:16,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:29:14" (1/3) ... [2019-11-06 22:29:16,814 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64c44aab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:29:16, skipping insertion in model container [2019-11-06 22:29:16,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:15" (2/3) ... [2019-11-06 22:29:16,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64c44aab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:29:16, skipping insertion in model container [2019-11-06 22:29:16,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:29:16" (3/3) ... [2019-11-06 22:29:16,817 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label17.c [2019-11-06 22:29:16,827 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:29:16,836 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:29:16,848 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:29:16,879 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:29:16,879 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:29:16,879 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:29:16,879 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:29:16,880 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:29:16,880 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:29:16,880 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:29:16,881 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:29:16,907 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-11-06 22:29:16,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-11-06 22:29:16,920 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:29:16,922 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:29:16,924 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:29:16,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:29:16,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1778503114, now seen corresponding path program 1 times [2019-11-06 22:29:16,940 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:29:16,940 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501118546] [2019-11-06 22:29:16,940 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:29:17,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:29:17,416 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 22:29:17,417 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501118546] [2019-11-06 22:29:17,418 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:29:17,418 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:29:17,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335324284] [2019-11-06 22:29:17,430 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:29:17,432 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:29:17,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:29:17,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:29:17,451 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 3 states. [2019-11-06 22:29:18,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:29:18,359 INFO L93 Difference]: Finished difference Result 547 states and 938 transitions. [2019-11-06 22:29:18,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:29:18,361 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 122 [2019-11-06 22:29:18,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:29:18,388 INFO L225 Difference]: With dead ends: 547 [2019-11-06 22:29:18,388 INFO L226 Difference]: Without dead ends: 278 [2019-11-06 22:29:18,399 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 22:29:18,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-11-06 22:29:18,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2019-11-06 22:29:18,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-11-06 22:29:18,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 412 transitions. [2019-11-06 22:29:18,514 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 412 transitions. Word has length 122 [2019-11-06 22:29:18,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:29:18,516 INFO L462 AbstractCegarLoop]: Abstraction has 278 states and 412 transitions. [2019-11-06 22:29:18,516 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:29:18,517 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 412 transitions. [2019-11-06 22:29:18,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-11-06 22:29:18,522 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:29:18,522 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:29:18,522 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:29:18,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:29:18,523 INFO L82 PathProgramCache]: Analyzing trace with hash -850587645, now seen corresponding path program 1 times [2019-11-06 22:29:18,523 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:29:18,523 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039061459] [2019-11-06 22:29:18,524 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:29:18,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:29:18,724 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:29:18,724 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039061459] [2019-11-06 22:29:18,724 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:29:18,725 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:29:18,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658016258] [2019-11-06 22:29:18,727 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:29:18,728 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:29:18,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:29:18,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:29:18,728 INFO L87 Difference]: Start difference. First operand 278 states and 412 transitions. Second operand 3 states. [2019-11-06 22:29:19,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:29:19,263 INFO L93 Difference]: Finished difference Result 820 states and 1233 transitions. [2019-11-06 22:29:19,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:29:19,263 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 139 [2019-11-06 22:29:19,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:29:19,271 INFO L225 Difference]: With dead ends: 820 [2019-11-06 22:29:19,272 INFO L226 Difference]: Without dead ends: 548 [2019-11-06 22:29:19,273 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 22:29:19,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2019-11-06 22:29:19,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 413. [2019-11-06 22:29:19,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 413 states. [2019-11-06 22:29:19,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 593 transitions. [2019-11-06 22:29:19,296 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 593 transitions. Word has length 139 [2019-11-06 22:29:19,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:29:19,297 INFO L462 AbstractCegarLoop]: Abstraction has 413 states and 593 transitions. [2019-11-06 22:29:19,297 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:29:19,297 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 593 transitions. [2019-11-06 22:29:19,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-11-06 22:29:19,300 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:29:19,301 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:29:19,301 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:29:19,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:29:19,301 INFO L82 PathProgramCache]: Analyzing trace with hash 252066703, now seen corresponding path program 1 times [2019-11-06 22:29:19,302 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:29:19,302 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561624426] [2019-11-06 22:29:19,302 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:29:19,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:29:19,437 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:29:19,437 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561624426] [2019-11-06 22:29:19,438 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:29:19,438 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:29:19,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185953417] [2019-11-06 22:29:19,439 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:29:19,439 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:29:19,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:29:19,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:29:19,440 INFO L87 Difference]: Start difference. First operand 413 states and 593 transitions. Second operand 6 states. [2019-11-06 22:29:20,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:29:20,252 INFO L93 Difference]: Finished difference Result 1116 states and 1631 transitions. [2019-11-06 22:29:20,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:29:20,254 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 165 [2019-11-06 22:29:20,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:29:20,259 INFO L225 Difference]: With dead ends: 1116 [2019-11-06 22:29:20,259 INFO L226 Difference]: Without dead ends: 709 [2019-11-06 22:29:20,261 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 22:29:20,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2019-11-06 22:29:20,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 699. [2019-11-06 22:29:20,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 699 states. [2019-11-06 22:29:20,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 950 transitions. [2019-11-06 22:29:20,294 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 950 transitions. Word has length 165 [2019-11-06 22:29:20,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:29:20,295 INFO L462 AbstractCegarLoop]: Abstraction has 699 states and 950 transitions. [2019-11-06 22:29:20,295 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:29:20,295 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 950 transitions. [2019-11-06 22:29:20,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-11-06 22:29:20,300 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:29:20,300 INFO L410 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, 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, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:29:20,300 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:29:20,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:29:20,301 INFO L82 PathProgramCache]: Analyzing trace with hash -159860650, now seen corresponding path program 1 times [2019-11-06 22:29:20,301 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:29:20,301 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377550951] [2019-11-06 22:29:20,302 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:29:20,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:29:20,458 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 57 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:29:20,459 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377550951] [2019-11-06 22:29:20,459 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101342474] [2019-11-06 22:29:20,459 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 22:29:20,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:29:20,637 INFO L256 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:29:20,666 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:29:20,780 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 57 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:29:20,781 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:29:20,891 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 57 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:29:20,892 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [149740142] [2019-11-06 22:29:20,898 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 177 [2019-11-06 22:29:20,955 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:29:20,955 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)