/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/Problem10_label30.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:42:57,291 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:42:57,294 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:42:57,314 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:42:57,339 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:42:57,341 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:42:57,342 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:42:57,344 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:42:57,346 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:42:57,347 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:42:57,348 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:42:57,353 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:42:57,357 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:42:57,360 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:42:57,364 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:42:57,364 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:42:57,366 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:42:57,376 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:42:57,377 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:42:57,380 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:42:57,381 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 22:42:57,410 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:42:57,410 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:42:57,411 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:42:57,412 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:42:57,412 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:42:57,412 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:42:57,412 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:42:57,416 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:42:57,416 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:42:57,416 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:42:57,416 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:42:57,417 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:42:57,417 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:42:57,417 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:42:57,417 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:42:57,417 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:42:57,418 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:42:57,418 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:42:57,418 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:42:57,418 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:42:57,419 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:42:57,422 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:42:57,422 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:42:57,422 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:42:57,423 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:42:57,423 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:42:57,423 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:42:57,423 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:42:57,423 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 22:42:57,701 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:42:57,722 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:42:57,726 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:42:57,728 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:42:57,728 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:42:57,729 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label30.c [2019-11-06 22:42:57,807 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ce4193a7/07fe7a7b966a4d7194da9d3db2c3b3eb/FLAGc13c9d771 [2019-11-06 22:42:58,381 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:42:58,382 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label30.c [2019-11-06 22:42:58,393 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ce4193a7/07fe7a7b966a4d7194da9d3db2c3b3eb/FLAGc13c9d771 [2019-11-06 22:42:58,651 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ce4193a7/07fe7a7b966a4d7194da9d3db2c3b3eb [2019-11-06 22:42:58,660 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:42:58,661 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:42:58,662 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:42:58,662 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:42:58,666 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:42:58,667 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:42:58" (1/1) ... [2019-11-06 22:42:58,670 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64049ca7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:58, skipping insertion in model container [2019-11-06 22:42:58,670 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:42:58" (1/1) ... [2019-11-06 22:42:58,679 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:42:58,734 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:42:59,157 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:42:59,162 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:42:59,394 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:42:59,416 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:42:59,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:59 WrapperNode [2019-11-06 22:42:59,416 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:42:59,417 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:42:59,417 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:42:59,417 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:42:59,430 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:59" (1/1) ... [2019-11-06 22:42:59,430 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:59" (1/1) ... [2019-11-06 22:42:59,448 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:59" (1/1) ... [2019-11-06 22:42:59,448 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:59" (1/1) ... [2019-11-06 22:42:59,500 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:59" (1/1) ... [2019-11-06 22:42:59,515 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:59" (1/1) ... [2019-11-06 22:42:59,521 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:59" (1/1) ... [2019-11-06 22:42:59,530 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:42:59,530 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:42:59,531 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:42:59,531 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:42:59,532 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:59" (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 22:42:59,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:42:59,630 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:42:59,630 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:42:59,630 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:42:59,630 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:42:59,631 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:42:59,631 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:42:59,632 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:42:59,632 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:42:59,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:42:59,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:43:00,909 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:43:00,910 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:43:00,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:43:00 BoogieIcfgContainer [2019-11-06 22:43:00,915 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:43:00,916 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:43:00,916 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:43:00,919 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:43:00,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:42:58" (1/3) ... [2019-11-06 22:43:00,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54eff3f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:43:00, skipping insertion in model container [2019-11-06 22:43:00,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:59" (2/3) ... [2019-11-06 22:43:00,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54eff3f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:43:00, skipping insertion in model container [2019-11-06 22:43:00,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:43:00" (3/3) ... [2019-11-06 22:43:00,929 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label30.c [2019-11-06 22:43:00,941 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:43:00,950 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:43:00,962 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:43:01,001 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:43:01,001 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:43:01,003 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:43:01,003 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:43:01,004 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:43:01,004 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:43:01,004 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:43:01,004 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:43:01,030 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-11-06 22:43:01,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-06 22:43:01,038 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:43:01,040 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] [2019-11-06 22:43:01,041 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:43:01,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:43:01,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1422134543, now seen corresponding path program 1 times [2019-11-06 22:43:01,055 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:43:01,055 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913886898] [2019-11-06 22:43:01,055 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:43:01,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:43:01,359 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 22:43:01,360 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913886898] [2019-11-06 22:43:01,360 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:43:01,361 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:43:01,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263975253] [2019-11-06 22:43:01,370 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:43:01,372 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:43:01,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:43:01,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:43:01,394 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 3 states. [2019-11-06 22:43:02,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:43:02,397 INFO L93 Difference]: Finished difference Result 571 states and 989 transitions. [2019-11-06 22:43:02,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:43:02,403 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2019-11-06 22:43:02,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:43:02,435 INFO L225 Difference]: With dead ends: 571 [2019-11-06 22:43:02,436 INFO L226 Difference]: Without dead ends: 294 [2019-11-06 22:43:02,448 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 22:43:02,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2019-11-06 22:43:02,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2019-11-06 22:43:02,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-11-06 22:43:02,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 446 transitions. [2019-11-06 22:43:02,533 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 446 transitions. Word has length 40 [2019-11-06 22:43:02,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:43:02,533 INFO L462 AbstractCegarLoop]: Abstraction has 294 states and 446 transitions. [2019-11-06 22:43:02,533 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:43:02,534 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 446 transitions. [2019-11-06 22:43:02,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-11-06 22:43:02,540 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:43:02,540 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:43:02,540 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:43:02,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:43:02,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1223819674, now seen corresponding path program 1 times [2019-11-06 22:43:02,541 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:43:02,542 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666189232] [2019-11-06 22:43:02,542 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:43:02,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:43:02,812 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:43:02,813 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666189232] [2019-11-06 22:43:02,814 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:43:02,814 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:43:02,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078810049] [2019-11-06 22:43:02,817 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:43:02,817 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:43:02,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:43:02,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:43:02,818 INFO L87 Difference]: Start difference. First operand 294 states and 446 transitions. Second operand 5 states. [2019-11-06 22:43:03,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:43:03,886 INFO L93 Difference]: Finished difference Result 888 states and 1367 transitions. [2019-11-06 22:43:03,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:43:03,887 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 122 [2019-11-06 22:43:03,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:43:03,892 INFO L225 Difference]: With dead ends: 888 [2019-11-06 22:43:03,892 INFO L226 Difference]: Without dead ends: 600 [2019-11-06 22:43:03,894 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 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 22:43:03,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2019-11-06 22:43:03,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 447. [2019-11-06 22:43:03,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447 states. [2019-11-06 22:43:03,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 661 transitions. [2019-11-06 22:43:03,957 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 661 transitions. Word has length 122 [2019-11-06 22:43:03,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:43:03,958 INFO L462 AbstractCegarLoop]: Abstraction has 447 states and 661 transitions. [2019-11-06 22:43:03,958 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:43:03,958 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 661 transitions. [2019-11-06 22:43:03,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-11-06 22:43:03,966 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:43:03,969 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:43:03,969 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:43:03,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:43:03,970 INFO L82 PathProgramCache]: Analyzing trace with hash 865845370, now seen corresponding path program 1 times [2019-11-06 22:43:03,970 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:43:03,970 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504151502] [2019-11-06 22:43:03,970 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:43:04,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:43:04,229 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:43:04,229 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504151502] [2019-11-06 22:43:04,230 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:43:04,230 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:43:04,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280445539] [2019-11-06 22:43:04,233 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:43:04,233 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:43:04,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:43:04,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:43:04,234 INFO L87 Difference]: Start difference. First operand 447 states and 661 transitions. Second operand 6 states. [2019-11-06 22:43:05,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:43:05,219 INFO L93 Difference]: Finished difference Result 1200 states and 1824 transitions. [2019-11-06 22:43:05,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:43:05,222 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 138 [2019-11-06 22:43:05,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:43:05,227 INFO L225 Difference]: With dead ends: 1200 [2019-11-06 22:43:05,227 INFO L226 Difference]: Without dead ends: 759 [2019-11-06 22:43:05,228 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 22:43:05,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2019-11-06 22:43:05,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 745. [2019-11-06 22:43:05,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 745 states. [2019-11-06 22:43:05,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1096 transitions. [2019-11-06 22:43:05,261 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1096 transitions. Word has length 138 [2019-11-06 22:43:05,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:43:05,262 INFO L462 AbstractCegarLoop]: Abstraction has 745 states and 1096 transitions. [2019-11-06 22:43:05,262 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:43:05,262 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1096 transitions. [2019-11-06 22:43:05,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-11-06 22:43:05,265 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:43:05,266 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:43:05,266 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:43:05,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:43:05,267 INFO L82 PathProgramCache]: Analyzing trace with hash 52272842, now seen corresponding path program 1 times [2019-11-06 22:43:05,267 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:43:05,267 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305066713] [2019-11-06 22:43:05,267 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:43:05,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:43:05,479 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:43:05,480 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305066713] [2019-11-06 22:43:05,480 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:43:05,480 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:43:05,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107406564] [2019-11-06 22:43:05,482 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:43:05,482 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:43:05,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:43:05,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:43:05,483 INFO L87 Difference]: Start difference. First operand 745 states and 1096 transitions. Second operand 6 states. [2019-11-06 22:43:06,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:43:06,569 INFO L93 Difference]: Finished difference Result 1814 states and 2766 transitions. [2019-11-06 22:43:06,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:43:06,569 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 162 [2019-11-06 22:43:06,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:43:06,577 INFO L225 Difference]: With dead ends: 1814 [2019-11-06 22:43:06,577 INFO L226 Difference]: Without dead ends: 1075 [2019-11-06 22:43:06,579 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 22:43:06,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2019-11-06 22:43:06,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 1047. [2019-11-06 22:43:06,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1047 states. [2019-11-06 22:43:06,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 1430 transitions. [2019-11-06 22:43:06,617 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 1430 transitions. Word has length 162 [2019-11-06 22:43:06,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:43:06,618 INFO L462 AbstractCegarLoop]: Abstraction has 1047 states and 1430 transitions. [2019-11-06 22:43:06,618 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:43:06,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 1430 transitions. [2019-11-06 22:43:06,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2019-11-06 22:43:06,621 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:43:06,622 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, 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] [2019-11-06 22:43:06,622 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:43:06,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:43:06,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1574410488, now seen corresponding path program 1 times [2019-11-06 22:43:06,623 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:43:06,623 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931061073] [2019-11-06 22:43:06,623 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:43:06,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:43:07,054 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 143 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:43:07,055 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931061073] [2019-11-06 22:43:07,055 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87428350] [2019-11-06 22:43:07,055 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 22:43:07,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:43:07,141 INFO L256 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:43:07,153 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:43:07,292 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 143 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:43:07,292 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:43:07,505 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 143 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:43:07,506 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [289759260] [2019-11-06 22:43:07,514 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 202 [2019-11-06 22:43:07,581 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:43:07,582 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-11-06 22:43:19,802 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-11-06 22:43:35,659 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-11-06 22:43:35,662 INFO L272 AbstractInterpreter]: Visited 90 different actions 173 times. Merged at 3 different actions 3 times. Never widened. Performed 307 root evaluator evaluations with a maximum evaluation depth of 16. Performed 307 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-11-06 22:43:35,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:43:35,665 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates