/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/Problem11_label50.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:47:36,344 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:47:36,347 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:47:36,365 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:47:36,390 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:47:36,393 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:47:36,395 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:47:36,398 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:47:36,399 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:47:36,400 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:47:36,401 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:47:36,403 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:47:36,404 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:47:36,405 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:47:36,406 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:47:36,407 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:47:36,409 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:47:36,416 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:47:36,417 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:47:36,417 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:47:36,418 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 22:47:36,432 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:47:36,432 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:47:36,433 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:47:36,433 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:47:36,434 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:47:36,434 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:47:36,434 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:47:36,434 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:47:36,435 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:47:36,435 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:47:36,435 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:47:36,435 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:47:36,435 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:47:36,435 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:47:36,436 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:47:36,436 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:47:36,436 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:47:36,436 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:47:36,437 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:47:36,437 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:47:36,437 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:47:36,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:47:36,437 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:47:36,438 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:47:36,438 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:47:36,438 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:47:36,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:47:36,438 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:47:36,439 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 22:47:36,711 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:47:36,733 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:47:36,737 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:47:36,740 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:47:36,740 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:47:36,741 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label50.c [2019-11-06 22:47:36,814 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/083e04d45/bb0c106ace4545e8a38a6781f3d590eb/FLAG604f1bc07 [2019-11-06 22:47:37,468 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:47:37,469 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label50.c [2019-11-06 22:47:37,483 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/083e04d45/bb0c106ace4545e8a38a6781f3d590eb/FLAG604f1bc07 [2019-11-06 22:47:37,685 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/083e04d45/bb0c106ace4545e8a38a6781f3d590eb [2019-11-06 22:47:37,693 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:47:37,695 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:47:37,696 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:47:37,696 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:47:37,700 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:47:37,701 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:47:37" (1/1) ... [2019-11-06 22:47:37,703 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@611855c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:37, skipping insertion in model container [2019-11-06 22:47:37,704 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:47:37" (1/1) ... [2019-11-06 22:47:37,711 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:47:37,764 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:47:38,498 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:47:38,509 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:47:38,701 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:47:38,718 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:47:38,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:38 WrapperNode [2019-11-06 22:47:38,719 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:47:38,720 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:47:38,720 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:47:38,720 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:47:38,735 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:38" (1/1) ... [2019-11-06 22:47:38,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:38" (1/1) ... [2019-11-06 22:47:38,759 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:38" (1/1) ... [2019-11-06 22:47:38,760 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:38" (1/1) ... [2019-11-06 22:47:38,833 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:38" (1/1) ... [2019-11-06 22:47:38,863 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:38" (1/1) ... [2019-11-06 22:47:38,882 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:38" (1/1) ... [2019-11-06 22:47:38,899 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:47:38,899 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:47:38,900 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:47:38,900 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:47:38,901 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:38" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:47:38,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:47:38,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:47:38,968 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:47:38,969 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:47:38,969 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:47:38,970 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:47:38,970 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:47:38,970 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:47:38,971 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:47:38,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:47:38,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:47:40,820 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:47:40,822 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:47:40,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:47:40 BoogieIcfgContainer [2019-11-06 22:47:40,827 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:47:40,830 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:47:40,830 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:47:40,839 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:47:40,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:47:37" (1/3) ... [2019-11-06 22:47:40,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45c5038a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:47:40, skipping insertion in model container [2019-11-06 22:47:40,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:38" (2/3) ... [2019-11-06 22:47:40,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45c5038a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:47:40, skipping insertion in model container [2019-11-06 22:47:40,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:47:40" (3/3) ... [2019-11-06 22:47:40,855 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label50.c [2019-11-06 22:47:40,871 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:47:40,885 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:47:40,901 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:47:40,956 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:47:40,956 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:47:40,957 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:47:40,957 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:47:40,957 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:47:40,957 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:47:40,958 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:47:40,958 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:47:40,991 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-11-06 22:47:40,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-06 22:47:41,000 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:47:41,001 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] [2019-11-06 22:47:41,003 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:47:41,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:47:41,012 INFO L82 PathProgramCache]: Analyzing trace with hash -172206893, now seen corresponding path program 1 times [2019-11-06 22:47:41,024 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:47:41,025 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299836443] [2019-11-06 22:47:41,025 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:47:41,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:41,442 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 22:47:41,443 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299836443] [2019-11-06 22:47:41,444 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:47:41,444 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:47:41,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071882041] [2019-11-06 22:47:41,451 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:47:41,453 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:47:41,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:47:41,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:47:41,471 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 4 states. [2019-11-06 22:47:43,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:47:43,841 INFO L93 Difference]: Finished difference Result 997 states and 1776 transitions. [2019-11-06 22:47:43,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:47:43,843 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2019-11-06 22:47:43,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:47:43,870 INFO L225 Difference]: With dead ends: 997 [2019-11-06 22:47:43,870 INFO L226 Difference]: Without dead ends: 623 [2019-11-06 22:47:43,885 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 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 22:47:43,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2019-11-06 22:47:43,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 620. [2019-11-06 22:47:43,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 620 states. [2019-11-06 22:47:43,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 896 transitions. [2019-11-06 22:47:44,000 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 896 transitions. Word has length 42 [2019-11-06 22:47:44,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:47:44,001 INFO L462 AbstractCegarLoop]: Abstraction has 620 states and 896 transitions. [2019-11-06 22:47:44,001 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:47:44,001 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 896 transitions. [2019-11-06 22:47:44,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-11-06 22:47:44,007 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:47:44,008 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:47:44,008 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:47:44,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:47:44,008 INFO L82 PathProgramCache]: Analyzing trace with hash -258983758, now seen corresponding path program 1 times [2019-11-06 22:47:44,009 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:47:44,009 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575345479] [2019-11-06 22:47:44,009 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:47:44,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:44,206 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:47:44,207 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575345479] [2019-11-06 22:47:44,207 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:47:44,208 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:47:44,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869760059] [2019-11-06 22:47:44,216 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:47:44,216 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:47:44,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:47:44,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:47:44,216 INFO L87 Difference]: Start difference. First operand 620 states and 896 transitions. Second operand 6 states. [2019-11-06 22:47:45,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:47:45,807 INFO L93 Difference]: Finished difference Result 1833 states and 2715 transitions. [2019-11-06 22:47:45,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:47:45,808 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2019-11-06 22:47:45,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:47:45,818 INFO L225 Difference]: With dead ends: 1833 [2019-11-06 22:47:45,818 INFO L226 Difference]: Without dead ends: 1219 [2019-11-06 22:47:45,820 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 22:47:45,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2019-11-06 22:47:45,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 1200. [2019-11-06 22:47:45,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1200 states. [2019-11-06 22:47:45,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 1735 transitions. [2019-11-06 22:47:45,871 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 1735 transitions. Word has length 114 [2019-11-06 22:47:45,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:47:45,872 INFO L462 AbstractCegarLoop]: Abstraction has 1200 states and 1735 transitions. [2019-11-06 22:47:45,872 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:47:45,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 1735 transitions. [2019-11-06 22:47:45,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-11-06 22:47:45,875 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:47:45,875 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:47:45,875 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:47:45,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:47:45,876 INFO L82 PathProgramCache]: Analyzing trace with hash -590798395, now seen corresponding path program 1 times [2019-11-06 22:47:45,876 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:47:45,876 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9190766] [2019-11-06 22:47:45,876 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:47:45,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:46,000 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:47:46,000 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9190766] [2019-11-06 22:47:46,001 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:47:46,001 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:47:46,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859021901] [2019-11-06 22:47:46,004 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:47:46,004 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:47:46,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:47:46,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:47:46,006 INFO L87 Difference]: Start difference. First operand 1200 states and 1735 transitions. Second operand 4 states. [2019-11-06 22:47:47,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:47:47,782 INFO L93 Difference]: Finished difference Result 3552 states and 5208 transitions. [2019-11-06 22:47:47,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:47:47,783 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 115 [2019-11-06 22:47:47,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:47:47,797 INFO L225 Difference]: With dead ends: 3552 [2019-11-06 22:47:47,797 INFO L226 Difference]: Without dead ends: 2358 [2019-11-06 22:47:47,800 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 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 22:47:47,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2358 states. [2019-11-06 22:47:47,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2358 to 2153. [2019-11-06 22:47:47,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2153 states. [2019-11-06 22:47:47,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 3070 transitions. [2019-11-06 22:47:47,866 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 3070 transitions. Word has length 115 [2019-11-06 22:47:47,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:47:47,867 INFO L462 AbstractCegarLoop]: Abstraction has 2153 states and 3070 transitions. [2019-11-06 22:47:47,867 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:47:47,867 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 3070 transitions. [2019-11-06 22:47:47,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-11-06 22:47:47,870 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:47:47,871 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:47:47,871 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:47:47,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:47:47,871 INFO L82 PathProgramCache]: Analyzing trace with hash 865187038, now seen corresponding path program 1 times [2019-11-06 22:47:47,872 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:47:47,872 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276183462] [2019-11-06 22:47:47,872 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:47:47,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:48,017 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:47:48,018 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276183462] [2019-11-06 22:47:48,018 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:47:48,018 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:47:48,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921689817] [2019-11-06 22:47:48,019 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:47:48,020 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:47:48,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:47:48,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:47:48,020 INFO L87 Difference]: Start difference. First operand 2153 states and 3070 transitions. Second operand 6 states. [2019-11-06 22:47:50,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:47:50,672 INFO L93 Difference]: Finished difference Result 8027 states and 14009 transitions. [2019-11-06 22:47:50,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 22:47:50,673 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 140 [2019-11-06 22:47:50,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:47:50,731 INFO L225 Difference]: With dead ends: 8027 [2019-11-06 22:47:50,731 INFO L226 Difference]: Without dead ends: 5880 [2019-11-06 22:47:50,742 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:47:50,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5880 states. [2019-11-06 22:47:50,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5880 to 5142. [2019-11-06 22:47:50,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5142 states. [2019-11-06 22:47:50,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5142 states to 5142 states and 7403 transitions. [2019-11-06 22:47:50,975 INFO L78 Accepts]: Start accepts. Automaton has 5142 states and 7403 transitions. Word has length 140 [2019-11-06 22:47:50,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:47:50,976 INFO L462 AbstractCegarLoop]: Abstraction has 5142 states and 7403 transitions. [2019-11-06 22:47:50,976 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:47:50,976 INFO L276 IsEmpty]: Start isEmpty. Operand 5142 states and 7403 transitions. [2019-11-06 22:47:50,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-11-06 22:47:50,981 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:47:50,982 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 22:47:50,982 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:47:50,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:47:50,982 INFO L82 PathProgramCache]: Analyzing trace with hash 141894414, now seen corresponding path program 1 times [2019-11-06 22:47:50,983 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:47:50,983 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863409270] [2019-11-06 22:47:50,983 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:47:51,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:51,201 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 139 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:47:51,202 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863409270] [2019-11-06 22:47:51,203 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440463760] [2019-11-06 22:47:51,203 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 22:47:51,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:51,350 INFO L256 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 22:47:51,374 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:47:51,431 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 139 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:47:51,431 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:47:51,630 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 139 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:47:51,630 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1164597176] [2019-11-06 22:47:51,636 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 188 [2019-11-06 22:47:51,687 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:47:51,687 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-11-06 22:48:19,175 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-11-06 22:48:19,177 INFO L272 AbstractInterpreter]: Visited 79 different actions 79 times. Never merged. Never widened. Performed 207 root evaluator evaluations with a maximum evaluation depth of 16. Performed 207 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Never found a fixpoint. Largest state had 28 variables. [2019-11-06 22:48:19,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:48:19,182 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates