/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/Problem02_label52.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:36:47,325 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:36:47,328 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:36:47,347 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:36:47,371 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:36:47,372 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:36:47,374 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:36:47,376 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:36:47,377 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:36:47,378 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:36:47,380 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:36:47,384 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:36:47,388 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:36:47,390 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:36:47,392 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:36:47,393 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:36:47,395 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:36:47,403 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:36:47,404 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:36:47,405 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:36:47,405 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 22:36:47,425 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:36:47,426 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:36:47,427 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:36:47,427 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:36:47,427 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:36:47,427 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:36:47,428 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:36:47,428 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:36:47,428 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:36:47,428 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:36:47,428 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:36:47,429 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:36:47,429 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:36:47,429 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:36:47,429 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:36:47,429 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:36:47,429 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:36:47,430 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:36:47,430 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:36:47,430 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:36:47,430 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:36:47,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:36:47,431 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:36:47,431 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:36:47,431 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:36:47,431 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:36:47,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:36:47,432 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:36:47,432 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 22:36:47,698 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:36:47,711 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:36:47,714 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:36:47,716 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:36:47,716 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:36:47,717 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label52.c [2019-11-06 22:36:47,784 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2fb504e92/91cad0632ec54366bc578dc3805d8a61/FLAG8d3cd90a2 [2019-11-06 22:36:48,270 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:36:48,271 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label52.c [2019-11-06 22:36:48,286 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2fb504e92/91cad0632ec54366bc578dc3805d8a61/FLAG8d3cd90a2 [2019-11-06 22:36:48,588 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2fb504e92/91cad0632ec54366bc578dc3805d8a61 [2019-11-06 22:36:48,598 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:36:48,599 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:36:48,600 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:36:48,600 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:36:48,604 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:36:48,604 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:36:48" (1/1) ... [2019-11-06 22:36:48,607 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d04c9f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:48, skipping insertion in model container [2019-11-06 22:36:48,607 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:36:48" (1/1) ... [2019-11-06 22:36:48,614 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:36:48,666 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:36:49,218 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:36:49,223 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:36:49,314 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:36:49,337 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:36:49,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:49 WrapperNode [2019-11-06 22:36:49,338 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:36:49,338 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:36:49,339 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:36:49,339 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:36:49,352 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:49" (1/1) ... [2019-11-06 22:36:49,352 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:49" (1/1) ... [2019-11-06 22:36:49,368 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:49" (1/1) ... [2019-11-06 22:36:49,368 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:49" (1/1) ... [2019-11-06 22:36:49,408 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:49" (1/1) ... [2019-11-06 22:36:49,424 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:49" (1/1) ... [2019-11-06 22:36:49,430 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:49" (1/1) ... [2019-11-06 22:36:49,441 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:36:49,441 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:36:49,441 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:36:49,441 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:36:49,446 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:49" (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 22:36:49,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:36:49,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:36:49,507 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:36:49,507 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:36:49,507 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:36:49,507 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:36:49,507 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:36:49,507 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:36:49,508 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:36:49,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:36:49,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:36:50,653 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:36:50,657 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:36:50,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:36:50 BoogieIcfgContainer [2019-11-06 22:36:50,659 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:36:50,662 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:36:50,662 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:36:50,667 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:36:50,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:36:48" (1/3) ... [2019-11-06 22:36:50,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7568cac4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:36:50, skipping insertion in model container [2019-11-06 22:36:50,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:49" (2/3) ... [2019-11-06 22:36:50,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7568cac4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:36:50, skipping insertion in model container [2019-11-06 22:36:50,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:36:50" (3/3) ... [2019-11-06 22:36:50,672 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label52.c [2019-11-06 22:36:50,682 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:36:50,692 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:36:50,703 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:36:50,734 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:36:50,735 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:36:50,735 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:36:50,735 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:36:50,735 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:36:50,736 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:36:50,736 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:36:50,736 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:36:50,772 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states. [2019-11-06 22:36:50,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-11-06 22:36:50,792 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:36:50,793 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] [2019-11-06 22:36:50,796 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:36:50,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:36:50,802 INFO L82 PathProgramCache]: Analyzing trace with hash -777531634, now seen corresponding path program 1 times [2019-11-06 22:36:50,812 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:36:50,812 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3337722] [2019-11-06 22:36:50,812 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:36:51,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:36:51,401 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 22:36:51,402 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3337722] [2019-11-06 22:36:51,403 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:36:51,403 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:36:51,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744112954] [2019-11-06 22:36:51,414 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:36:51,416 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:36:51,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:36:51,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:36:51,438 INFO L87 Difference]: Start difference. First operand 236 states. Second operand 4 states. [2019-11-06 22:36:52,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:36:52,655 INFO L93 Difference]: Finished difference Result 770 states and 1353 transitions. [2019-11-06 22:36:52,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:36:52,657 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 110 [2019-11-06 22:36:52,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:36:52,676 INFO L225 Difference]: With dead ends: 770 [2019-11-06 22:36:52,677 INFO L226 Difference]: Without dead ends: 468 [2019-11-06 22:36:52,685 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:36:52,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2019-11-06 22:36:52,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 466. [2019-11-06 22:36:52,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 466 states. [2019-11-06 22:36:52,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 692 transitions. [2019-11-06 22:36:52,768 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 692 transitions. Word has length 110 [2019-11-06 22:36:52,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:36:52,769 INFO L462 AbstractCegarLoop]: Abstraction has 466 states and 692 transitions. [2019-11-06 22:36:52,770 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:36:52,770 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 692 transitions. [2019-11-06 22:36:52,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-11-06 22:36:52,781 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:36:52,782 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:36:52,782 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:36:52,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:36:52,783 INFO L82 PathProgramCache]: Analyzing trace with hash 235870035, now seen corresponding path program 1 times [2019-11-06 22:36:52,783 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:36:52,784 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923995696] [2019-11-06 22:36:52,785 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:36:52,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:36:52,944 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:36:52,946 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923995696] [2019-11-06 22:36:52,946 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:36:52,946 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:36:52,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188014569] [2019-11-06 22:36:52,951 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:36:52,951 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:36:52,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:36:52,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:36:52,952 INFO L87 Difference]: Start difference. First operand 466 states and 692 transitions. Second operand 6 states. [2019-11-06 22:36:53,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:36:53,777 INFO L93 Difference]: Finished difference Result 1395 states and 2141 transitions. [2019-11-06 22:36:53,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:36:53,778 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 130 [2019-11-06 22:36:53,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:36:53,786 INFO L225 Difference]: With dead ends: 1395 [2019-11-06 22:36:53,787 INFO L226 Difference]: Without dead ends: 935 [2019-11-06 22:36:53,789 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 22:36:53,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2019-11-06 22:36:53,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 918. [2019-11-06 22:36:53,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 918 states. [2019-11-06 22:36:53,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 1351 transitions. [2019-11-06 22:36:53,848 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 1351 transitions. Word has length 130 [2019-11-06 22:36:53,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:36:53,851 INFO L462 AbstractCegarLoop]: Abstraction has 918 states and 1351 transitions. [2019-11-06 22:36:53,851 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:36:53,851 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 1351 transitions. [2019-11-06 22:36:53,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-11-06 22:36:53,857 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:36:53,857 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:36:53,857 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:36:53,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:36:53,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1290355991, now seen corresponding path program 1 times [2019-11-06 22:36:53,858 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:36:53,858 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338798768] [2019-11-06 22:36:53,858 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:36:53,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:36:54,052 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:36:54,052 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338798768] [2019-11-06 22:36:54,052 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:36:54,053 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:36:54,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483258663] [2019-11-06 22:36:54,054 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:36:54,054 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:36:54,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:36:54,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:36:54,055 INFO L87 Difference]: Start difference. First operand 918 states and 1351 transitions. Second operand 3 states. [2019-11-06 22:36:54,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:36:54,669 INFO L93 Difference]: Finished difference Result 2411 states and 3645 transitions. [2019-11-06 22:36:54,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:36:54,670 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 131 [2019-11-06 22:36:54,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:36:54,679 INFO L225 Difference]: With dead ends: 2411 [2019-11-06 22:36:54,680 INFO L226 Difference]: Without dead ends: 1499 [2019-11-06 22:36:54,683 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 22:36:54,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1499 states. [2019-11-06 22:36:54,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1499 to 1209. [2019-11-06 22:36:54,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1209 states. [2019-11-06 22:36:54,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 1768 transitions. [2019-11-06 22:36:54,732 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 1768 transitions. Word has length 131 [2019-11-06 22:36:54,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:36:54,733 INFO L462 AbstractCegarLoop]: Abstraction has 1209 states and 1768 transitions. [2019-11-06 22:36:54,733 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:36:54,733 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 1768 transitions. [2019-11-06 22:36:54,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-11-06 22:36:54,738 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:36:54,739 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, 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] [2019-11-06 22:36:54,739 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:36:54,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:36:54,739 INFO L82 PathProgramCache]: Analyzing trace with hash 741521436, now seen corresponding path program 1 times [2019-11-06 22:36:54,740 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:36:54,740 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092838678] [2019-11-06 22:36:54,740 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:36:54,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:36:54,919 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 91 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:36:54,920 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092838678] [2019-11-06 22:36:54,920 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619081843] [2019-11-06 22:36:54,920 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 22:36:55,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:36:55,037 INFO L256 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:36:55,050 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:36:55,164 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 91 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:36:55,165 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:36:55,285 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 91 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:36:55,286 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1436243535] [2019-11-06 22:36:55,292 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 184 [2019-11-06 22:36:55,339 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:36:55,339 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)